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/* Subroutines used for MIPS code generation.
Copyright (C) 1989-2021 Free Software Foundation, Inc.
Contributed by A. Lichnewsky, lich@inria.inria.fr.
Changes by Michael Meissner, meissner@osf.org.
64-bit r4000 support by Ian Lance Taylor, ian@cygnus.com, and
Brendan Eich, brendan@microunity.com.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#define IN_TARGET_CODE 1
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "backend.h"
#include "target.h"
#include "rtl.h"
#include "tree.h"
#include "memmodel.h"
#include "gimple.h"
#include "cfghooks.h"
#include "df.h"
#include "tm_p.h"
#include "stringpool.h"
#include "attribs.h"
#include "optabs.h"
#include "regs.h"
#include "emit-rtl.h"
#include "recog.h"
#include "cgraph.h"
#include "diagnostic.h"
#include "insn-attr.h"
#include "output.h"
#include "alias.h"
#include "fold-const.h"
#include "varasm.h"
#include "stor-layout.h"
#include "calls.h"
#include "explow.h"
#include "expr.h"
#include "libfuncs.h"
#include "reload.h"
#include "common/common-target.h"
#include "langhooks.h"
#include "cfgrtl.h"
#include "cfganal.h"
#include "sched-int.h"
#include "gimplify.h"
#include "target-globals.h"
#include "tree-pass.h"
#include "context.h"
#include "builtins.h"
#include "rtl-iter.h"
#include "flags.h"
/* This file should be included last. */
#include "target-def.h"
/* True if X is an UNSPEC wrapper around a SYMBOL_REF or LABEL_REF. */
#define UNSPEC_ADDRESS_P(X) \
(GET_CODE (X) == UNSPEC \
&& XINT (X, 1) >= UNSPEC_ADDRESS_FIRST \
&& XINT (X, 1) < UNSPEC_ADDRESS_FIRST + NUM_SYMBOL_TYPES)
/* Extract the symbol or label from UNSPEC wrapper X. */
#define UNSPEC_ADDRESS(X) \
XVECEXP (X, 0, 0)
/* Extract the symbol type from UNSPEC wrapper X. */
#define UNSPEC_ADDRESS_TYPE(X) \
((enum mips_symbol_type) (XINT (X, 1) - UNSPEC_ADDRESS_FIRST))
/* The maximum distance between the top of the stack frame and the
value $sp has when we save and restore registers.
The value for normal-mode code must be a SMALL_OPERAND and must
preserve the maximum stack alignment. We therefore use a value
of 0x7ff0 in this case.
microMIPS LWM and SWM support 12-bit offsets (from -0x800 to 0x7ff),
so we use a maximum of 0x7f0 for TARGET_MICROMIPS.
MIPS16e SAVE and RESTORE instructions can adjust the stack pointer by
up to 0x7f8 bytes and can usually save or restore all the registers
that we need to save or restore. (Note that we can only use these
instructions for o32, for which the stack alignment is 8 bytes.)
We use a maximum gap of 0x100 or 0x400 for MIPS16 code when SAVE and
RESTORE are not available. We can then use unextended instructions
to save and restore registers, and to allocate and deallocate the top
part of the frame. */
#define MIPS_MAX_FIRST_STACK_STEP \
(!TARGET_COMPRESSION ? 0x7ff0 \
: TARGET_MICROMIPS || GENERATE_MIPS16E_SAVE_RESTORE ? 0x7f8 \
: TARGET_64BIT ? 0x100 : 0x400)
/* True if INSN is a mips.md pattern or asm statement. */
/* ??? This test exists through the compiler, perhaps it should be
moved to rtl.h. */
#define USEFUL_INSN_P(INSN) \
(NONDEBUG_INSN_P (INSN) \
&& GET_CODE (PATTERN (INSN)) != USE \
&& GET_CODE (PATTERN (INSN)) != CLOBBER)
/* If INSN is a delayed branch sequence, return the first instruction
in the sequence, otherwise return INSN itself. */
#define SEQ_BEGIN(INSN) \
(INSN_P (INSN) && GET_CODE (PATTERN (INSN)) == SEQUENCE \
? as_a <rtx_insn *> (XVECEXP (PATTERN (INSN), 0, 0)) \
: (INSN))
/* Likewise for the last instruction in a delayed branch sequence. */
#define SEQ_END(INSN) \
(INSN_P (INSN) && GET_CODE (PATTERN (INSN)) == SEQUENCE \
? as_a <rtx_insn *> (XVECEXP (PATTERN (INSN), \
0, \
XVECLEN (PATTERN (INSN), 0) - 1)) \
: (INSN))
/* Execute the following loop body with SUBINSN set to each instruction
between SEQ_BEGIN (INSN) and SEQ_END (INSN) inclusive. */
#define FOR_EACH_SUBINSN(SUBINSN, INSN) \
for ((SUBINSN) = SEQ_BEGIN (INSN); \
(SUBINSN) != NEXT_INSN (SEQ_END (INSN)); \
(SUBINSN) = NEXT_INSN (SUBINSN))
/* True if bit BIT is set in VALUE. */
#define BITSET_P(VALUE, BIT) (((VALUE) & (1 << (BIT))) != 0)
/* Return the opcode for a ptr_mode load of the form:
l[wd] DEST, OFFSET(BASE). */
#define MIPS_LOAD_PTR(DEST, OFFSET, BASE) \
(((ptr_mode == DImode ? 0x37 : 0x23) << 26) \
| ((BASE) << 21) \
| ((DEST) << 16) \
| (OFFSET))
/* Return the opcode to move register SRC into register DEST. */
#define MIPS_MOVE(DEST, SRC) \
((TARGET_64BIT ? 0x2d : 0x21) \
| ((DEST) << 11) \
| ((SRC) << 21))
/* Return the opcode for:
lui DEST, VALUE. */
#define MIPS_LUI(DEST, VALUE) \
((0xf << 26) | ((DEST) << 16) | (VALUE))
/* Return the opcode to jump to register DEST. When the JR opcode is not
available use JALR $0, DEST. */
#define MIPS_JR(DEST) \
(TARGET_CB_ALWAYS ? ((0x1b << 27) | ((DEST) << 16)) \
: (((DEST) << 21) | (ISA_HAS_JR ? 0x8 : 0x9)))
/* Return the opcode for:
bal . + (1 + OFFSET) * 4. */
#define MIPS_BAL(OFFSET) \
((0x1 << 26) | (0x11 << 16) | (OFFSET))
/* Return the usual opcode for a nop. */
#define MIPS_NOP 0
/* Classifies an address.
ADDRESS_REG
A natural register + offset address. The register satisfies
mips_valid_base_register_p and the offset is a const_arith_operand.
ADDRESS_LO_SUM
A LO_SUM rtx. The first operand is a valid base register and
the second operand is a symbolic address.
ADDRESS_CONST_INT
A signed 16-bit constant address.
ADDRESS_SYMBOLIC:
A constant symbolic address. */
enum mips_address_type {
ADDRESS_REG,
ADDRESS_LO_SUM,
ADDRESS_CONST_INT,
ADDRESS_SYMBOLIC
};
/* Classifies an unconditional branch of interest for the P6600. */
enum mips_ucbranch_type
{
/* May not even be a branch. */
UC_UNDEFINED,
UC_BALC,
UC_OTHER
};
/* Macros to create an enumeration identifier for a function prototype. */
#define MIPS_FTYPE_NAME1(A, B) MIPS_##A##_FTYPE_##B
#define MIPS_FTYPE_NAME2(A, B, C) MIPS_##A##_FTYPE_##B##_##C
#define MIPS_FTYPE_NAME3(A, B, C, D) MIPS_##A##_FTYPE_##B##_##C##_##D
#define MIPS_FTYPE_NAME4(A, B, C, D, E) MIPS_##A##_FTYPE_##B##_##C##_##D##_##E
/* Classifies the prototype of a built-in function. */
enum mips_function_type {
#define DEF_MIPS_FTYPE(NARGS, LIST) MIPS_FTYPE_NAME##NARGS LIST,
#include "config/mips/mips-ftypes.def"
#undef DEF_MIPS_FTYPE
MIPS_MAX_FTYPE_MAX
};
/* Specifies how a built-in function should be converted into rtl. */
enum mips_builtin_type {
/* The function corresponds directly to an .md pattern. The return
value is mapped to operand 0 and the arguments are mapped to
operands 1 and above. */
MIPS_BUILTIN_DIRECT,
/* The function corresponds directly to an .md pattern. There is no return
value and the arguments are mapped to operands 0 and above. */
MIPS_BUILTIN_DIRECT_NO_TARGET,
/* The function corresponds to a comparison instruction followed by
a mips_cond_move_tf_ps pattern. The first two arguments are the
values to compare and the second two arguments are the vector
operands for the movt.ps or movf.ps instruction (in assembly order). */
MIPS_BUILTIN_MOVF,
MIPS_BUILTIN_MOVT,
/* The function corresponds to a V2SF comparison instruction. Operand 0
of this instruction is the result of the comparison, which has mode
CCV2 or CCV4. The function arguments are mapped to operands 1 and
above. The function's return value is an SImode boolean that is
true under the following conditions:
MIPS_BUILTIN_CMP_ANY: one of the registers is true
MIPS_BUILTIN_CMP_ALL: all of the registers are true
MIPS_BUILTIN_CMP_LOWER: the first register is true
MIPS_BUILTIN_CMP_UPPER: the second register is true. */
MIPS_BUILTIN_CMP_ANY,
MIPS_BUILTIN_CMP_ALL,
MIPS_BUILTIN_CMP_UPPER,
MIPS_BUILTIN_CMP_LOWER,
/* As above, but the instruction only sets a single $fcc register. */
MIPS_BUILTIN_CMP_SINGLE,
/* The function corresponds to an MSA conditional branch instruction
combined with a compare instruction. */
MIPS_BUILTIN_MSA_TEST_BRANCH,
/* For generating bposge32 branch instructions in MIPS32 DSP ASE. */
MIPS_BUILTIN_BPOSGE32
};
/* Invoke MACRO (COND) for each C.cond.fmt condition. */
#define MIPS_FP_CONDITIONS(MACRO) \
MACRO (f), \
MACRO (un), \
MACRO (eq), \
MACRO (ueq), \
MACRO (olt), \
MACRO (ult), \
MACRO (ole), \
MACRO (ule), \
MACRO (sf), \
MACRO (ngle), \
MACRO (seq), \
MACRO (ngl), \
MACRO (lt), \
MACRO (nge), \
MACRO (le), \
MACRO (ngt)
/* Enumerates the codes above as MIPS_FP_COND_<X>. */
#define DECLARE_MIPS_COND(X) MIPS_FP_COND_ ## X
enum mips_fp_condition {
MIPS_FP_CONDITIONS (DECLARE_MIPS_COND)
};
#undef DECLARE_MIPS_COND
/* Index X provides the string representation of MIPS_FP_COND_<X>. */
#define STRINGIFY(X) #X
static const char *const mips_fp_conditions[] = {
MIPS_FP_CONDITIONS (STRINGIFY)
};
#undef STRINGIFY
/* A class used to control a comdat-style stub that we output in each
translation unit that needs it. */
class mips_one_only_stub {
public:
virtual ~mips_one_only_stub () {}
/* Return the name of the stub. */
virtual const char *get_name () = 0;
/* Output the body of the function to asm_out_file. */
virtual void output_body () = 0;
};
/* Tuning information that is automatically derived from other sources
(such as the scheduler). */
static struct {
/* The architecture and tuning settings that this structure describes. */
enum processor arch;
enum processor tune;
/* True if this structure describes MIPS16 settings. */
bool mips16_p;
/* True if the structure has been initialized. */
bool initialized_p;
/* True if "MULT $0, $0" is preferable to "MTLO $0; MTHI $0"
when optimizing for speed. */
bool fast_mult_zero_zero_p;
} mips_tuning_info;
/* Information about a single argument. */
struct mips_arg_info {
/* True if the argument is passed in a floating-point register, or
would have been if we hadn't run out of registers. */
bool fpr_p;
/* The number of words passed in registers, rounded up. */
unsigned int reg_words;
/* For EABI, the offset of the first register from GP_ARG_FIRST or
FP_ARG_FIRST. For other ABIs, the offset of the first register from
the start of the ABI's argument structure (see the CUMULATIVE_ARGS
comment for details).
The value is MAX_ARGS_IN_REGISTERS if the argument is passed entirely
on the stack. */
unsigned int reg_offset;
/* The number of words that must be passed on the stack, rounded up. */
unsigned int stack_words;
/* The offset from the start of the stack overflow area of the argument's
first stack word. Only meaningful when STACK_WORDS is nonzero. */
unsigned int stack_offset;
};
/* Information about an address described by mips_address_type.
ADDRESS_CONST_INT
No fields are used.
ADDRESS_REG
REG is the base register and OFFSET is the constant offset.
ADDRESS_LO_SUM
REG and OFFSET are the operands to the LO_SUM and SYMBOL_TYPE
is the type of symbol it references.
ADDRESS_SYMBOLIC
SYMBOL_TYPE is the type of symbol that the address references. */
struct mips_address_info {
enum mips_address_type type;
rtx reg;
rtx offset;
enum mips_symbol_type symbol_type;
};
/* One stage in a constant building sequence. These sequences have
the form:
A = VALUE[0]
A = A CODE[1] VALUE[1]
A = A CODE[2] VALUE[2]
...
where A is an accumulator, each CODE[i] is a binary rtl operation
and each VALUE[i] is a constant integer. CODE[0] is undefined. */
struct mips_integer_op {
enum rtx_code code;
unsigned HOST_WIDE_INT value;
};
/* The largest number of operations needed to load an integer constant.
The worst accepted case for 64-bit constants is LUI,ORI,SLL,ORI,SLL,ORI.
When the lowest bit is clear, we can try, but reject a sequence with
an extra SLL at the end. */
#define MIPS_MAX_INTEGER_OPS 7
/* Information about a MIPS16e SAVE or RESTORE instruction. */
struct mips16e_save_restore_info {
/* The number of argument registers saved by a SAVE instruction.
0 for RESTORE instructions. */
unsigned int nargs;
/* Bit X is set if the instruction saves or restores GPR X. */
unsigned int mask;
/* The total number of bytes to allocate. */
HOST_WIDE_INT size;
};
/* Costs of various operations on the different architectures. */
struct mips_rtx_cost_data
{
unsigned short fp_add;
unsigned short fp_mult_sf;
unsigned short fp_mult_df;
unsigned short fp_div_sf;
unsigned short fp_div_df;
unsigned short int_mult_si;
unsigned short int_mult_di;
unsigned short int_div_si;
unsigned short int_div_di;
unsigned short branch_cost;
unsigned short memory_latency;
};
/* Global variables for machine-dependent things. */
/* The -G setting, or the configuration's default small-data limit if
no -G option is given. */
static unsigned int mips_small_data_threshold;
/* The number of file directives written by mips_output_filename. */
int num_source_filenames;
/* The name that appeared in the last .file directive written by
mips_output_filename, or "" if mips_output_filename hasn't
written anything yet. */
const char *current_function_file = "";
/* Arrays that map GCC register numbers to debugger register numbers. */
int mips_dbx_regno[FIRST_PSEUDO_REGISTER];
int mips_dwarf_regno[FIRST_PSEUDO_REGISTER];
/* Information about the current function's epilogue, used only while
expanding it. */
static struct {
/* A list of queued REG_CFA_RESTORE notes. */
rtx cfa_restores;
/* The CFA is currently defined as CFA_REG + CFA_OFFSET. */
rtx cfa_reg;
HOST_WIDE_INT cfa_offset;
/* The offset of the CFA from the stack pointer while restoring
registers. */
HOST_WIDE_INT cfa_restore_sp_offset;
} mips_epilogue;
/* The nesting depth of the PRINT_OPERAND '%(', '%<' and '%[' constructs. */
struct mips_asm_switch mips_noreorder = { "reorder", 0 };
struct mips_asm_switch mips_nomacro = { "macro", 0 };
struct mips_asm_switch mips_noat = { "at", 0 };
/* True if we're writing out a branch-likely instruction rather than a
normal branch. */
static bool mips_branch_likely;
/* The current instruction-set architecture. */
enum processor mips_arch;
const struct mips_cpu_info *mips_arch_info;
/* The processor that we should tune the code for. */
enum processor mips_tune;
const struct mips_cpu_info *mips_tune_info;
/* The ISA level associated with mips_arch. */
int mips_isa;
/* The ISA revision level. This is 0 for MIPS I to V and N for
MIPS{32,64}rN. */
int mips_isa_rev;
/* The architecture selected by -mipsN, or null if -mipsN wasn't used. */
static const struct mips_cpu_info *mips_isa_option_info;
/* Which cost information to use. */
static const struct mips_rtx_cost_data *mips_cost;
/* The ambient target flags, excluding MASK_MIPS16. */
static int mips_base_target_flags;
/* The default compression mode. */
unsigned int mips_base_compression_flags;
/* The ambient values of other global variables. */
static int mips_base_schedule_insns; /* flag_schedule_insns */
static int mips_base_reorder_blocks_and_partition; /* flag_reorder... */
static int mips_base_move_loop_invariants; /* flag_move_loop_invariants */
static const char *mips_base_align_loops; /* align_loops */
static const char *mips_base_align_jumps; /* align_jumps */
static const char *mips_base_align_functions; /* align_functions */
/* Index [M][R] is true if register R is allowed to hold a value of mode M. */
static bool mips_hard_regno_mode_ok_p[MAX_MACHINE_MODE][FIRST_PSEUDO_REGISTER];
/* Index C is true if character C is a valid PRINT_OPERAND punctation
character. */
static bool mips_print_operand_punct[256];
static GTY (()) int mips_output_filename_first_time = 1;
/* mips_split_p[X] is true if symbols of type X can be split by
mips_split_symbol. */
bool mips_split_p[NUM_SYMBOL_TYPES];
/* mips_split_hi_p[X] is true if the high parts of symbols of type X
can be split by mips_split_symbol. */
bool mips_split_hi_p[NUM_SYMBOL_TYPES];
/* mips_use_pcrel_pool_p[X] is true if symbols of type X should be
forced into a PC-relative constant pool. */
bool mips_use_pcrel_pool_p[NUM_SYMBOL_TYPES];
/* mips_lo_relocs[X] is the relocation to use when a symbol of type X
appears in a LO_SUM. It can be null if such LO_SUMs aren't valid or
if they are matched by a special .md file pattern. */
const char *mips_lo_relocs[NUM_SYMBOL_TYPES];
/* Likewise for HIGHs. */
const char *mips_hi_relocs[NUM_SYMBOL_TYPES];
/* Target state for MIPS16. */
struct target_globals *mips16_globals;
/* Target state for MICROMIPS. */
struct target_globals *micromips_globals;
/* Cached value of can_issue_more. This is cached in mips_variable_issue hook
and returned from mips_sched_reorder2. */
static int cached_can_issue_more;
/* The stubs for various MIPS16 support functions, if used. */
static mips_one_only_stub *mips16_rdhwr_stub;
static mips_one_only_stub *mips16_get_fcsr_stub;
static mips_one_only_stub *mips16_set_fcsr_stub;
/* Index R is the smallest register class that contains register R. */
const enum reg_class mips_regno_to_class[FIRST_PSEUDO_REGISTER] = {
LEA_REGS, LEA_REGS, M16_STORE_REGS, V1_REG,
M16_STORE_REGS, M16_STORE_REGS, M16_STORE_REGS, M16_STORE_REGS,
LEA_REGS, LEA_REGS, LEA_REGS, LEA_REGS,
LEA_REGS, LEA_REGS, LEA_REGS, LEA_REGS,
M16_REGS, M16_STORE_REGS, LEA_REGS, LEA_REGS,
LEA_REGS, LEA_REGS, LEA_REGS, LEA_REGS,
T_REG, PIC_FN_ADDR_REG, LEA_REGS, LEA_REGS,
LEA_REGS, M16_SP_REGS, LEA_REGS, LEA_REGS,
FP_REGS, FP_REGS, FP_REGS, FP_REGS,
FP_REGS, FP_REGS, FP_REGS, FP_REGS,
FP_REGS, FP_REGS, FP_REGS, FP_REGS,
FP_REGS, FP_REGS, FP_REGS, FP_REGS,
FP_REGS, FP_REGS, FP_REGS, FP_REGS,
FP_REGS, FP_REGS, FP_REGS, FP_REGS,
FP_REGS, FP_REGS, FP_REGS, FP_REGS,
FP_REGS, FP_REGS, FP_REGS, FP_REGS,
MD0_REG, MD1_REG, NO_REGS, ST_REGS,
ST_REGS, ST_REGS, ST_REGS, ST_REGS,
ST_REGS, ST_REGS, ST_REGS, NO_REGS,
NO_REGS, FRAME_REGS, FRAME_REGS, NO_REGS,
COP0_REGS, COP0_REGS, COP0_REGS, COP0_REGS,
COP0_REGS, COP0_REGS, COP0_REGS, COP0_REGS,
COP0_REGS, COP0_REGS, COP0_REGS, COP0_REGS,
COP0_REGS, COP0_REGS, COP0_REGS, COP0_REGS,
COP0_REGS, COP0_REGS, COP0_REGS, COP0_REGS,
COP0_REGS, COP0_REGS, COP0_REGS, COP0_REGS,
COP0_REGS, COP0_REGS, COP0_REGS, COP0_REGS,
COP0_REGS, COP0_REGS, COP0_REGS, COP0_REGS,
COP2_REGS, COP2_REGS, COP2_REGS, COP2_REGS,
COP2_REGS, COP2_REGS, COP2_REGS, COP2_REGS,
COP2_REGS, COP2_REGS, COP2_REGS, COP2_REGS,
COP2_REGS, COP2_REGS, COP2_REGS, COP2_REGS,
COP2_REGS, COP2_REGS, COP2_REGS, COP2_REGS,
COP2_REGS, COP2_REGS, COP2_REGS, COP2_REGS,
COP2_REGS, COP2_REGS, COP2_REGS, COP2_REGS,
COP2_REGS, COP2_REGS, COP2_REGS, COP2_REGS,
COP3_REGS, COP3_REGS, COP3_REGS, COP3_REGS,
COP3_REGS, COP3_REGS, COP3_REGS, COP3_REGS,
COP3_REGS, COP3_REGS, COP3_REGS, COP3_REGS,
COP3_REGS, COP3_REGS, COP3_REGS, COP3_REGS,
COP3_REGS, COP3_REGS, COP3_REGS, COP3_REGS,
COP3_REGS, COP3_REGS, COP3_REGS, COP3_REGS,
COP3_REGS, COP3_REGS, COP3_REGS, COP3_REGS,
COP3_REGS, COP3_REGS, COP3_REGS, COP3_REGS,
DSP_ACC_REGS, DSP_ACC_REGS, DSP_ACC_REGS, DSP_ACC_REGS,
DSP_ACC_REGS, DSP_ACC_REGS, ALL_REGS, ALL_REGS,
ALL_REGS, ALL_REGS, ALL_REGS, ALL_REGS
};
static tree mips_handle_interrupt_attr (tree *, tree, tree, int, bool *);
static tree mips_handle_use_shadow_register_set_attr (tree *, tree, tree, int,
bool *);
/* The value of TARGET_ATTRIBUTE_TABLE. */
static const struct attribute_spec mips_attribute_table[] = {
/* { name, min_len, max_len, decl_req, type_req, fn_type_req,
affects_type_identity, handler, exclude } */
{ "long_call", 0, 0, false, true, true, false, NULL, NULL },
{ "short_call", 0, 0, false, true, true, false, NULL, NULL },
{ "far", 0, 0, false, true, true, false, NULL, NULL },
{ "near", 0, 0, false, true, true, false, NULL, NULL },
/* We would really like to treat "mips16" and "nomips16" as type
attributes, but GCC doesn't provide the hooks we need to support
the right conversion rules. As declaration attributes, they affect
code generation but don't carry other semantics. */
{ "mips16", 0, 0, true, false, false, false, NULL, NULL },
{ "nomips16", 0, 0, true, false, false, false, NULL, NULL },
{ "micromips", 0, 0, true, false, false, false, NULL, NULL },
{ "nomicromips", 0, 0, true, false, false, false, NULL, NULL },
{ "nocompression", 0, 0, true, false, false, false, NULL, NULL },
/* Allow functions to be specified as interrupt handlers */
{ "interrupt", 0, 1, false, true, true, false, mips_handle_interrupt_attr,
NULL },
{ "use_shadow_register_set", 0, 1, false, true, true, false,
mips_handle_use_shadow_register_set_attr, NULL },
{ "keep_interrupts_masked", 0, 0, false, true, true, false, NULL, NULL },
{ "use_debug_exception_return", 0, 0, false, true, true, false, NULL, NULL },
{ NULL, 0, 0, false, false, false, false, NULL, NULL }
};
/* A table describing all the processors GCC knows about; see
mips-cpus.def for details. */
static const struct mips_cpu_info mips_cpu_info_table[] = {
#define MIPS_CPU(NAME, CPU, ISA, FLAGS) \
{ NAME, CPU, ISA, FLAGS },
#include "mips-cpus.def"
#undef MIPS_CPU
};
/* Default costs. If these are used for a processor we should look
up the actual costs. */
#define DEFAULT_COSTS COSTS_N_INSNS (6), /* fp_add */ \
COSTS_N_INSNS (7), /* fp_mult_sf */ \
COSTS_N_INSNS (8), /* fp_mult_df */ \
COSTS_N_INSNS (23), /* fp_div_sf */ \
COSTS_N_INSNS (36), /* fp_div_df */ \
COSTS_N_INSNS (10), /* int_mult_si */ \
COSTS_N_INSNS (10), /* int_mult_di */ \
COSTS_N_INSNS (69), /* int_div_si */ \
COSTS_N_INSNS (69), /* int_div_di */ \
2, /* branch_cost */ \
4 /* memory_latency */
/* Floating-point costs for processors without an FPU. Just assume that
all floating-point libcalls are very expensive. */
#define SOFT_FP_COSTS COSTS_N_INSNS (256), /* fp_add */ \
COSTS_N_INSNS (256), /* fp_mult_sf */ \
COSTS_N_INSNS (256), /* fp_mult_df */ \
COSTS_N_INSNS (256), /* fp_div_sf */ \
COSTS_N_INSNS (256) /* fp_div_df */
/* Costs to use when optimizing for size. */
static const struct mips_rtx_cost_data mips_rtx_cost_optimize_size = {
COSTS_N_INSNS (1), /* fp_add */
COSTS_N_INSNS (1), /* fp_mult_sf */
COSTS_N_INSNS (1), /* fp_mult_df */
COSTS_N_INSNS (1), /* fp_div_sf */
COSTS_N_INSNS (1), /* fp_div_df */
COSTS_N_INSNS (1), /* int_mult_si */
COSTS_N_INSNS (1), /* int_mult_di */
COSTS_N_INSNS (1), /* int_div_si */
COSTS_N_INSNS (1), /* int_div_di */
2, /* branch_cost */
4 /* memory_latency */
};
/* Costs to use when optimizing for speed, indexed by processor. */
static const struct mips_rtx_cost_data
mips_rtx_cost_data[NUM_PROCESSOR_VALUES] = {
{ /* R3000 */
COSTS_N_INSNS (2), /* fp_add */
COSTS_N_INSNS (4), /* fp_mult_sf */
COSTS_N_INSNS (5), /* fp_mult_df */
COSTS_N_INSNS (12), /* fp_div_sf */
COSTS_N_INSNS (19), /* fp_div_df */
COSTS_N_INSNS (12), /* int_mult_si */
COSTS_N_INSNS (12), /* int_mult_di */
COSTS_N_INSNS (35), /* int_div_si */
COSTS_N_INSNS (35), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* 4KC */
SOFT_FP_COSTS,
COSTS_N_INSNS (6), /* int_mult_si */
COSTS_N_INSNS (6), /* int_mult_di */
COSTS_N_INSNS (36), /* int_div_si */
COSTS_N_INSNS (36), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* 4KP */
SOFT_FP_COSTS,
COSTS_N_INSNS (36), /* int_mult_si */
COSTS_N_INSNS (36), /* int_mult_di */
COSTS_N_INSNS (37), /* int_div_si */
COSTS_N_INSNS (37), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* 5KC */
SOFT_FP_COSTS,
COSTS_N_INSNS (4), /* int_mult_si */
COSTS_N_INSNS (11), /* int_mult_di */
COSTS_N_INSNS (36), /* int_div_si */
COSTS_N_INSNS (68), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* 5KF */
COSTS_N_INSNS (4), /* fp_add */
COSTS_N_INSNS (4), /* fp_mult_sf */
COSTS_N_INSNS (5), /* fp_mult_df */
COSTS_N_INSNS (17), /* fp_div_sf */
COSTS_N_INSNS (32), /* fp_div_df */
COSTS_N_INSNS (4), /* int_mult_si */
COSTS_N_INSNS (11), /* int_mult_di */
COSTS_N_INSNS (36), /* int_div_si */
COSTS_N_INSNS (68), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* 20KC */
COSTS_N_INSNS (4), /* fp_add */
COSTS_N_INSNS (4), /* fp_mult_sf */
COSTS_N_INSNS (5), /* fp_mult_df */
COSTS_N_INSNS (17), /* fp_div_sf */
COSTS_N_INSNS (32), /* fp_div_df */
COSTS_N_INSNS (4), /* int_mult_si */
COSTS_N_INSNS (7), /* int_mult_di */
COSTS_N_INSNS (42), /* int_div_si */
COSTS_N_INSNS (72), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* 24KC */
SOFT_FP_COSTS,
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (5), /* int_mult_di */
COSTS_N_INSNS (41), /* int_div_si */
COSTS_N_INSNS (41), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* 24KF2_1 */
COSTS_N_INSNS (8), /* fp_add */
COSTS_N_INSNS (8), /* fp_mult_sf */
COSTS_N_INSNS (10), /* fp_mult_df */
COSTS_N_INSNS (34), /* fp_div_sf */
COSTS_N_INSNS (64), /* fp_div_df */
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (5), /* int_mult_di */
COSTS_N_INSNS (41), /* int_div_si */
COSTS_N_INSNS (41), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* 24KF1_1 */
COSTS_N_INSNS (4), /* fp_add */
COSTS_N_INSNS (4), /* fp_mult_sf */
COSTS_N_INSNS (5), /* fp_mult_df */
COSTS_N_INSNS (17), /* fp_div_sf */
COSTS_N_INSNS (32), /* fp_div_df */
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (5), /* int_mult_di */
COSTS_N_INSNS (41), /* int_div_si */
COSTS_N_INSNS (41), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* 74KC */
SOFT_FP_COSTS,
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (5), /* int_mult_di */
COSTS_N_INSNS (41), /* int_div_si */
COSTS_N_INSNS (41), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* 74KF2_1 */
COSTS_N_INSNS (8), /* fp_add */
COSTS_N_INSNS (8), /* fp_mult_sf */
COSTS_N_INSNS (10), /* fp_mult_df */
COSTS_N_INSNS (34), /* fp_div_sf */
COSTS_N_INSNS (64), /* fp_div_df */
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (5), /* int_mult_di */
COSTS_N_INSNS (41), /* int_div_si */
COSTS_N_INSNS (41), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* 74KF1_1 */
COSTS_N_INSNS (4), /* fp_add */
COSTS_N_INSNS (4), /* fp_mult_sf */
COSTS_N_INSNS (5), /* fp_mult_df */
COSTS_N_INSNS (17), /* fp_div_sf */
COSTS_N_INSNS (32), /* fp_div_df */
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (5), /* int_mult_di */
COSTS_N_INSNS (41), /* int_div_si */
COSTS_N_INSNS (41), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* 74KF3_2 */
COSTS_N_INSNS (6), /* fp_add */
COSTS_N_INSNS (6), /* fp_mult_sf */
COSTS_N_INSNS (7), /* fp_mult_df */
COSTS_N_INSNS (25), /* fp_div_sf */
COSTS_N_INSNS (48), /* fp_div_df */
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (5), /* int_mult_di */
COSTS_N_INSNS (41), /* int_div_si */
COSTS_N_INSNS (41), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* Loongson-2E */
DEFAULT_COSTS
},
{ /* Loongson-2F */
DEFAULT_COSTS
},
{ /* Loongson gs464. */
DEFAULT_COSTS
},
{ /* Loongson gs464e. */
DEFAULT_COSTS
},
{ /* Loongson gs264e. */
DEFAULT_COSTS
},
{ /* M4k */
DEFAULT_COSTS
},
/* Octeon */
{
SOFT_FP_COSTS,
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (5), /* int_mult_di */
COSTS_N_INSNS (72), /* int_div_si */
COSTS_N_INSNS (72), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
/* Octeon II */
{
SOFT_FP_COSTS,
COSTS_N_INSNS (6), /* int_mult_si */
COSTS_N_INSNS (6), /* int_mult_di */
COSTS_N_INSNS (18), /* int_div_si */
COSTS_N_INSNS (35), /* int_div_di */
4, /* branch_cost */
4 /* memory_latency */
},
/* Octeon III */
{
COSTS_N_INSNS (6), /* fp_add */
COSTS_N_INSNS (6), /* fp_mult_sf */
COSTS_N_INSNS (7), /* fp_mult_df */
COSTS_N_INSNS (25), /* fp_div_sf */
COSTS_N_INSNS (48), /* fp_div_df */
COSTS_N_INSNS (6), /* int_mult_si */
COSTS_N_INSNS (6), /* int_mult_di */
COSTS_N_INSNS (18), /* int_div_si */
COSTS_N_INSNS (35), /* int_div_di */
4, /* branch_cost */
4 /* memory_latency */
},
{ /* R3900 */
COSTS_N_INSNS (2), /* fp_add */
COSTS_N_INSNS (4), /* fp_mult_sf */
COSTS_N_INSNS (5), /* fp_mult_df */
COSTS_N_INSNS (12), /* fp_div_sf */
COSTS_N_INSNS (19), /* fp_div_df */
COSTS_N_INSNS (2), /* int_mult_si */
COSTS_N_INSNS (2), /* int_mult_di */
COSTS_N_INSNS (35), /* int_div_si */
COSTS_N_INSNS (35), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* R6000 */
COSTS_N_INSNS (3), /* fp_add */
COSTS_N_INSNS (5), /* fp_mult_sf */
COSTS_N_INSNS (6), /* fp_mult_df */
COSTS_N_INSNS (15), /* fp_div_sf */
COSTS_N_INSNS (16), /* fp_div_df */
COSTS_N_INSNS (17), /* int_mult_si */
COSTS_N_INSNS (17), /* int_mult_di */
COSTS_N_INSNS (38), /* int_div_si */
COSTS_N_INSNS (38), /* int_div_di */
2, /* branch_cost */
6 /* memory_latency */
},
{ /* R4000 */
COSTS_N_INSNS (6), /* fp_add */
COSTS_N_INSNS (7), /* fp_mult_sf */
COSTS_N_INSNS (8), /* fp_mult_df */
COSTS_N_INSNS (23), /* fp_div_sf */
COSTS_N_INSNS (36), /* fp_div_df */
COSTS_N_INSNS (10), /* int_mult_si */
COSTS_N_INSNS (10), /* int_mult_di */
COSTS_N_INSNS (69), /* int_div_si */
COSTS_N_INSNS (69), /* int_div_di */
2, /* branch_cost */
6 /* memory_latency */
},
{ /* R4100 */
DEFAULT_COSTS
},
{ /* R4111 */
DEFAULT_COSTS
},
{ /* R4120 */
DEFAULT_COSTS
},
{ /* R4130 */
/* The only costs that appear to be updated here are
integer multiplication. */
SOFT_FP_COSTS,
COSTS_N_INSNS (4), /* int_mult_si */
COSTS_N_INSNS (6), /* int_mult_di */
COSTS_N_INSNS (69), /* int_div_si */
COSTS_N_INSNS (69), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* R4300 */
DEFAULT_COSTS
},
{ /* R4600 */
DEFAULT_COSTS
},
{ /* R4650 */
DEFAULT_COSTS
},
{ /* R4700 */
DEFAULT_COSTS
},
{ /* R5000 */
COSTS_N_INSNS (6), /* fp_add */
COSTS_N_INSNS (4), /* fp_mult_sf */
COSTS_N_INSNS (5), /* fp_mult_df */
COSTS_N_INSNS (23), /* fp_div_sf */
COSTS_N_INSNS (36), /* fp_div_df */
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (5), /* int_mult_di */
COSTS_N_INSNS (36), /* int_div_si */
COSTS_N_INSNS (36), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* R5400 */
COSTS_N_INSNS (6), /* fp_add */
COSTS_N_INSNS (5), /* fp_mult_sf */
COSTS_N_INSNS (6), /* fp_mult_df */
COSTS_N_INSNS (30), /* fp_div_sf */
COSTS_N_INSNS (59), /* fp_div_df */
COSTS_N_INSNS (3), /* int_mult_si */
COSTS_N_INSNS (4), /* int_mult_di */
COSTS_N_INSNS (42), /* int_div_si */
COSTS_N_INSNS (74), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* R5500 */
COSTS_N_INSNS (6), /* fp_add */
COSTS_N_INSNS (5), /* fp_mult_sf */
COSTS_N_INSNS (6), /* fp_mult_df */
COSTS_N_INSNS (30), /* fp_div_sf */
COSTS_N_INSNS (59), /* fp_div_df */
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (9), /* int_mult_di */
COSTS_N_INSNS (42), /* int_div_si */
COSTS_N_INSNS (74), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* R5900 */
COSTS_N_INSNS (4), /* fp_add */
COSTS_N_INSNS (4), /* fp_mult_sf */
COSTS_N_INSNS (256), /* fp_mult_df */
COSTS_N_INSNS (8), /* fp_div_sf */
COSTS_N_INSNS (256), /* fp_div_df */
COSTS_N_INSNS (4), /* int_mult_si */
COSTS_N_INSNS (256), /* int_mult_di */
COSTS_N_INSNS (37), /* int_div_si */
COSTS_N_INSNS (256), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* R7000 */
/* The only costs that are changed here are
integer multiplication. */
COSTS_N_INSNS (6), /* fp_add */
COSTS_N_INSNS (7), /* fp_mult_sf */
COSTS_N_INSNS (8), /* fp_mult_df */
COSTS_N_INSNS (23), /* fp_div_sf */
COSTS_N_INSNS (36), /* fp_div_df */
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (9), /* int_mult_di */
COSTS_N_INSNS (69), /* int_div_si */
COSTS_N_INSNS (69), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* R8000 */
DEFAULT_COSTS
},
{ /* R9000 */
/* The only costs that are changed here are
integer multiplication. */
COSTS_N_INSNS (6), /* fp_add */
COSTS_N_INSNS (7), /* fp_mult_sf */
COSTS_N_INSNS (8), /* fp_mult_df */
COSTS_N_INSNS (23), /* fp_div_sf */
COSTS_N_INSNS (36), /* fp_div_df */
COSTS_N_INSNS (3), /* int_mult_si */
COSTS_N_INSNS (8), /* int_mult_di */
COSTS_N_INSNS (69), /* int_div_si */
COSTS_N_INSNS (69), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* R1x000 */
COSTS_N_INSNS (2), /* fp_add */
COSTS_N_INSNS (2), /* fp_mult_sf */
COSTS_N_INSNS (2), /* fp_mult_df */
COSTS_N_INSNS (12), /* fp_div_sf */
COSTS_N_INSNS (19), /* fp_div_df */
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (9), /* int_mult_di */
COSTS_N_INSNS (34), /* int_div_si */
COSTS_N_INSNS (66), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* SB1 */
/* These costs are the same as the SB-1A below. */
COSTS_N_INSNS (4), /* fp_add */
COSTS_N_INSNS (4), /* fp_mult_sf */
COSTS_N_INSNS (4), /* fp_mult_df */
COSTS_N_INSNS (24), /* fp_div_sf */
COSTS_N_INSNS (32), /* fp_div_df */
COSTS_N_INSNS (3), /* int_mult_si */
COSTS_N_INSNS (4), /* int_mult_di */
COSTS_N_INSNS (36), /* int_div_si */
COSTS_N_INSNS (68), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* SB1-A */
/* These costs are the same as the SB-1 above. */
COSTS_N_INSNS (4), /* fp_add */
COSTS_N_INSNS (4), /* fp_mult_sf */
COSTS_N_INSNS (4), /* fp_mult_df */
COSTS_N_INSNS (24), /* fp_div_sf */
COSTS_N_INSNS (32), /* fp_div_df */
COSTS_N_INSNS (3), /* int_mult_si */
COSTS_N_INSNS (4), /* int_mult_di */
COSTS_N_INSNS (36), /* int_div_si */
COSTS_N_INSNS (68), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* SR71000 */
DEFAULT_COSTS
},
{ /* XLR */
SOFT_FP_COSTS,
COSTS_N_INSNS (8), /* int_mult_si */
COSTS_N_INSNS (8), /* int_mult_di */
COSTS_N_INSNS (72), /* int_div_si */
COSTS_N_INSNS (72), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* XLP */
/* These costs are the same as 5KF above. */
COSTS_N_INSNS (4), /* fp_add */
COSTS_N_INSNS (4), /* fp_mult_sf */
COSTS_N_INSNS (5), /* fp_mult_df */
COSTS_N_INSNS (17), /* fp_div_sf */
COSTS_N_INSNS (32), /* fp_div_df */
COSTS_N_INSNS (4), /* int_mult_si */
COSTS_N_INSNS (11), /* int_mult_di */
COSTS_N_INSNS (36), /* int_div_si */
COSTS_N_INSNS (68), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* P5600 */
COSTS_N_INSNS (4), /* fp_add */
COSTS_N_INSNS (5), /* fp_mult_sf */
COSTS_N_INSNS (5), /* fp_mult_df */
COSTS_N_INSNS (17), /* fp_div_sf */
COSTS_N_INSNS (17), /* fp_div_df */
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (5), /* int_mult_di */
COSTS_N_INSNS (8), /* int_div_si */
COSTS_N_INSNS (8), /* int_div_di */
2, /* branch_cost */
4 /* memory_latency */
},
{ /* M5100 */
COSTS_N_INSNS (4), /* fp_add */
COSTS_N_INSNS (4), /* fp_mult_sf */
COSTS_N_INSNS (5), /* fp_mult_df */
COSTS_N_INSNS (17), /* fp_div_sf */
COSTS_N_INSNS (32), /* fp_div_df */
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (5), /* int_mult_di */
COSTS_N_INSNS (34), /* int_div_si */
COSTS_N_INSNS (68), /* int_div_di */
1, /* branch_cost */
4 /* memory_latency */
},
{ /* I6400 */
COSTS_N_INSNS (4), /* fp_add */
COSTS_N_INSNS (5), /* fp_mult_sf */
COSTS_N_INSNS (5), /* fp_mult_df */
COSTS_N_INSNS (32), /* fp_div_sf */
COSTS_N_INSNS (32), /* fp_div_df */
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (5), /* int_mult_di */
COSTS_N_INSNS (36), /* int_div_si */
COSTS_N_INSNS (36), /* int_div_di */
2, /* branch_cost */
4 /* memory_latency */
},
{ /* P6600 */
COSTS_N_INSNS (4), /* fp_add */
COSTS_N_INSNS (5), /* fp_mult_sf */
COSTS_N_INSNS (5), /* fp_mult_df */
COSTS_N_INSNS (17), /* fp_div_sf */
COSTS_N_INSNS (17), /* fp_div_df */
COSTS_N_INSNS (5), /* int_mult_si */
COSTS_N_INSNS (5), /* int_mult_di */
COSTS_N_INSNS (8), /* int_div_si */
COSTS_N_INSNS (8), /* int_div_di */
2, /* branch_cost */
4 /* memory_latency */
}
};
static rtx mips_find_pic_call_symbol (rtx_insn *, rtx, bool);
static int mips_register_move_cost (machine_mode, reg_class_t,
reg_class_t);
static unsigned int mips_function_arg_boundary (machine_mode, const_tree);
static rtx mips_gen_const_int_vector_shuffle (machine_mode, int);
/* This hash table keeps track of implicit "mips16" and "nomips16" attributes
for -mflip_mips16. It maps decl names onto a boolean mode setting. */
static GTY (()) hash_map<nofree_string_hash, bool> *mflip_mips16_htab;
/* True if -mflip-mips16 should next add an attribute for the default MIPS16
mode, false if it should next add an attribute for the opposite mode. */
static GTY(()) bool mips16_flipper;
/* DECL is a function that needs a default "mips16" or "nomips16" attribute
for -mflip-mips16. Return true if it should use "mips16" and false if
it should use "nomips16". */
static bool
mflip_mips16_use_mips16_p (tree decl)
{
const char *name;
bool base_is_mips16 = (mips_base_compression_flags & MASK_MIPS16) != 0;
/* Use the opposite of the command-line setting for anonymous decls. */
if (!DECL_NAME (decl))
return !base_is_mips16;
if (!mflip_mips16_htab)
mflip_mips16_htab = hash_map<nofree_string_hash, bool>::create_ggc (37);
name = IDENTIFIER_POINTER (DECL_NAME (decl));
bool existed;
bool *slot = &mflip_mips16_htab->get_or_insert (name, &existed);
if (!existed)
{
mips16_flipper = !mips16_flipper;
*slot = mips16_flipper ? !base_is_mips16 : base_is_mips16;
}
return *slot;
}
/* Predicates to test for presence of "near"/"short_call" and "far"/"long_call"
attributes on the given TYPE. */
static bool
mips_near_type_p (const_tree type)
{
return (lookup_attribute ("short_call", TYPE_ATTRIBUTES (type)) != NULL
|| lookup_attribute ("near", TYPE_ATTRIBUTES (type)) != NULL);
}
static bool
mips_far_type_p (const_tree type)
{
return (lookup_attribute ("long_call", TYPE_ATTRIBUTES (type)) != NULL
|| lookup_attribute ("far", TYPE_ATTRIBUTES (type)) != NULL);
}
/* Check if the interrupt attribute is set for a function. */
static bool
mips_interrupt_type_p (tree type)
{
return lookup_attribute ("interrupt", TYPE_ATTRIBUTES (type)) != NULL;
}
/* Return the mask for the "interrupt" attribute. */
static enum mips_int_mask
mips_interrupt_mask (tree type)
{
tree attr = lookup_attribute ("interrupt", TYPE_ATTRIBUTES (type));
tree args, cst;
const char *str;
/* For missing attributes or no arguments then return 'eic' as a safe
fallback. */
if (attr == NULL)
return INT_MASK_EIC;
args = TREE_VALUE (attr);
if (args == NULL)
return INT_MASK_EIC;
cst = TREE_VALUE (args);
if (strcmp (TREE_STRING_POINTER (cst), "eic") == 0)
return INT_MASK_EIC;
/* The validation code in mips_handle_interrupt_attr guarantees that the
argument is now in the form:
vector=(sw0|sw1|hw0|hw1|hw2|hw3|hw4|hw5). */
str = TREE_STRING_POINTER (cst);
gcc_assert (strlen (str) == strlen ("vector=sw0"));
if (str[7] == 's')
return (enum mips_int_mask) (INT_MASK_SW0 + (str[9] - '0'));
return (enum mips_int_mask) (INT_MASK_HW0 + (str[9] - '0'));
}
/* Return the mips_shadow_set if the "use_shadow_register_set" attribute is
set for a function. */
static enum mips_shadow_set
mips_use_shadow_register_set (tree type)
{
tree attr = lookup_attribute ("use_shadow_register_set",
TYPE_ATTRIBUTES (type));
tree args;
/* The validation code in mips_handle_use_shadow_register_set_attr guarantees
that if an argument is present then it means: Assume the shadow register
set has a valid stack pointer in it. */
if (attr == NULL)
return SHADOW_SET_NO;
args = TREE_VALUE (attr);
if (args == NULL)
return SHADOW_SET_YES;
return SHADOW_SET_INTSTACK;
}
/* Check if the attribute to keep interrupts masked is set for a function. */
static bool
mips_keep_interrupts_masked_p (tree type)
{
return lookup_attribute ("keep_interrupts_masked",
TYPE_ATTRIBUTES (type)) != NULL;
}
/* Check if the attribute to use debug exception return is set for
a function. */
static bool
mips_use_debug_exception_return_p (tree type)
{
return lookup_attribute ("use_debug_exception_return",
TYPE_ATTRIBUTES (type)) != NULL;
}
/* Return the set of compression modes that are explicitly required
by the attributes in ATTRIBUTES. */
static unsigned int
mips_get_compress_on_flags (tree attributes)
{
unsigned int flags = 0;
if (lookup_attribute ("mips16", attributes) != NULL)
flags |= MASK_MIPS16;
if (lookup_attribute ("micromips", attributes) != NULL)
flags |= MASK_MICROMIPS;
return flags;
}
/* Return the set of compression modes that are explicitly forbidden
by the attributes in ATTRIBUTES. */
static unsigned int
mips_get_compress_off_flags (tree attributes)
{
unsigned int flags = 0;
if (lookup_attribute ("nocompression", attributes) != NULL)
flags |= MASK_MIPS16 | MASK_MICROMIPS;
if (lookup_attribute ("nomips16", attributes) != NULL)
flags |= MASK_MIPS16;
if (lookup_attribute ("nomicromips", attributes) != NULL)
flags |= MASK_MICROMIPS;
return flags;
}
/* Return the compression mode that should be used for function DECL.
Return the ambient setting if DECL is null. */
static unsigned int
mips_get_compress_mode (tree decl)
{
unsigned int flags, force_on;
flags = mips_base_compression_flags;
if (decl)
{
/* Nested functions must use the same frame pointer as their
parent and must therefore use the same ISA mode. */
tree parent = decl_function_context (decl);
if (parent)
decl = parent;
force_on = mips_get_compress_on_flags (DECL_ATTRIBUTES (decl));
if (force_on)
return force_on;
flags &= ~mips_get_compress_off_flags (DECL_ATTRIBUTES (decl));
}
return flags;
}
/* Return the attribute name associated with MASK_MIPS16 and MASK_MICROMIPS
flags FLAGS. */
static const char *
mips_get_compress_on_name (unsigned int flags)
{
if (flags == MASK_MIPS16)
return "mips16";
return "micromips";
}
/* Return the attribute name that forbids MASK_MIPS16 and MASK_MICROMIPS
flags FLAGS. */
static const char *
mips_get_compress_off_name (unsigned int flags)
{
if (flags == MASK_MIPS16)
return "nomips16";
if (flags == MASK_MICROMIPS)
return "nomicromips";
return "nocompression";
}
/* Implement TARGET_COMP_TYPE_ATTRIBUTES. */
static int
mips_comp_type_attributes (const_tree type1, const_tree type2)
{
/* Disallow mixed near/far attributes. */
if (mips_far_type_p (type1) && mips_near_type_p (type2))
return 0;
if (mips_near_type_p (type1) && mips_far_type_p (type2))
return 0;
return 1;
}
/* Implement TARGET_INSERT_ATTRIBUTES. */
static void
mips_insert_attributes (tree decl, tree *attributes)
{
const char *name;
unsigned int compression_flags, nocompression_flags;
/* Check for "mips16" and "nomips16" attributes. */
compression_flags = mips_get_compress_on_flags (*attributes);
nocompression_flags = mips_get_compress_off_flags (*attributes);
if (TREE_CODE (decl) != FUNCTION_DECL)
{
if (nocompression_flags)
error ("%qs attribute only applies to functions",
mips_get_compress_off_name (nocompression_flags));
if (compression_flags)
error ("%qs attribute only applies to functions",
mips_get_compress_on_name (nocompression_flags));
}
else
{
compression_flags |= mips_get_compress_on_flags (DECL_ATTRIBUTES (decl));
nocompression_flags |=
mips_get_compress_off_flags (DECL_ATTRIBUTES (decl));
if (compression_flags && nocompression_flags)
error ("%qE cannot have both %qs and %qs attributes",
DECL_NAME (decl), mips_get_compress_on_name (compression_flags),
mips_get_compress_off_name (nocompression_flags));
if (compression_flags & MASK_MIPS16
&& compression_flags & MASK_MICROMIPS)
error ("%qE cannot have both %qs and %qs attributes",
DECL_NAME (decl), "mips16", "micromips");
if (TARGET_FLIP_MIPS16
&& !DECL_ARTIFICIAL (decl)
&& compression_flags == 0
&& nocompression_flags == 0)
{
/* Implement -mflip-mips16. If DECL has neither a "nomips16" nor a
"mips16" attribute, arbitrarily pick one. We must pick the same
setting for duplicate declarations of a function. */
name = mflip_mips16_use_mips16_p (decl) ? "mips16" : "nomips16";
*attributes = tree_cons (get_identifier (name), NULL, *attributes);
name = "nomicromips";
*attributes = tree_cons (get_identifier (name), NULL, *attributes);
}
}
}
/* Implement TARGET_MERGE_DECL_ATTRIBUTES. */
static tree
mips_merge_decl_attributes (tree olddecl, tree newdecl)
{
unsigned int diff;
diff = (mips_get_compress_on_flags (DECL_ATTRIBUTES (olddecl))
^ mips_get_compress_on_flags (DECL_ATTRIBUTES (newdecl)));
if (diff)
error ("%qE redeclared with conflicting %qs attributes",
DECL_NAME (newdecl), mips_get_compress_on_name (diff));
diff = (mips_get_compress_off_flags (DECL_ATTRIBUTES (olddecl))
^ mips_get_compress_off_flags (DECL_ATTRIBUTES (newdecl)));
if (diff)
error ("%qE redeclared with conflicting %qs attributes",
DECL_NAME (newdecl), mips_get_compress_off_name (diff));
return merge_attributes (DECL_ATTRIBUTES (olddecl),
DECL_ATTRIBUTES (newdecl));
}
/* Implement TARGET_CAN_INLINE_P. */
static bool
mips_can_inline_p (tree caller, tree callee)
{
if (mips_get_compress_mode (callee) != mips_get_compress_mode (caller))
return false;
return default_target_can_inline_p (caller, callee);
}
/* Handle an "interrupt" attribute with an optional argument. */
static tree
mips_handle_interrupt_attr (tree *node ATTRIBUTE_UNUSED, tree name, tree args,
int flags ATTRIBUTE_UNUSED, bool *no_add_attrs)
{
/* Check for an argument. */
if (is_attribute_p ("interrupt", name) && args != NULL)
{
tree cst;
cst = TREE_VALUE (args);
if (TREE_CODE (cst) != STRING_CST)
{
warning (OPT_Wattributes,
"%qE attribute requires a string argument",
name);
*no_add_attrs = true;
}
else if (strcmp (TREE_STRING_POINTER (cst), "eic") != 0
&& !startswith (TREE_STRING_POINTER (cst), "vector="))
{
warning (OPT_Wattributes,
"argument to %qE attribute is neither eic, nor "
"vector=<line>", name);
*no_add_attrs = true;
}
else if (startswith (TREE_STRING_POINTER (cst), "vector="))
{
const char *arg = TREE_STRING_POINTER (cst) + 7;
/* Acceptable names are: sw0,sw1,hw0,hw1,hw2,hw3,hw4,hw5. */
if (strlen (arg) != 3
|| (arg[0] != 's' && arg[0] != 'h')
|| arg[1] != 'w'
|| (arg[0] == 's' && arg[2] != '0' && arg[2] != '1')
|| (arg[0] == 'h' && (arg[2] < '0' || arg[2] > '5')))
{
warning (OPT_Wattributes,
"interrupt vector to %qE attribute is not "
"vector=(sw0|sw1|hw0|hw1|hw2|hw3|hw4|hw5)",
name);
*no_add_attrs = true;
}
}
return NULL_TREE;
}
return NULL_TREE;
}
/* Handle a "use_shadow_register_set" attribute with an optional argument. */
static tree
mips_handle_use_shadow_register_set_attr (tree *node ATTRIBUTE_UNUSED,
tree name, tree args,
int flags ATTRIBUTE_UNUSED,
bool *no_add_attrs)
{
/* Check for an argument. */
if (is_attribute_p ("use_shadow_register_set", name) && args != NULL)
{
tree cst;
cst = TREE_VALUE (args);
if (TREE_CODE (cst) != STRING_CST)
{
warning (OPT_Wattributes,
"%qE attribute requires a string argument",
name);
*no_add_attrs = true;
}
else if (strcmp (TREE_STRING_POINTER (cst), "intstack") != 0)
{
warning (OPT_Wattributes,
"argument to %qE attribute is not intstack", name);
*no_add_attrs = true;
}
return NULL_TREE;
}
return NULL_TREE;
}
/* If X is a PLUS of a CONST_INT, return the two terms in *BASE_PTR
and *OFFSET_PTR. Return X in *BASE_PTR and 0 in *OFFSET_PTR otherwise. */
static void
mips_split_plus (rtx x, rtx *base_ptr, HOST_WIDE_INT *offset_ptr)
{
if (GET_CODE (x) == PLUS && CONST_INT_P (XEXP (x, 1)))
{
*base_ptr = XEXP (x, 0);
*offset_ptr = INTVAL (XEXP (x, 1));
}
else
{
*base_ptr = x;
*offset_ptr = 0;
}
}
static unsigned int mips_build_integer (struct mips_integer_op *,
unsigned HOST_WIDE_INT);
/* A subroutine of mips_build_integer, with the same interface.
Assume that the final action in the sequence should be a left shift. */
static unsigned int
mips_build_shift (struct mips_integer_op *codes, HOST_WIDE_INT value)
{
unsigned int i, shift;
/* Shift VALUE right until its lowest bit is set. Shift arithmetically
since signed numbers are easier to load than unsigned ones. */
shift = 0;
while ((value & 1) == 0)
value /= 2, shift++;
i = mips_build_integer (codes, value);
codes[i].code = ASHIFT;
codes[i].value = shift;
return i + 1;
}
/* As for mips_build_shift, but assume that the final action will be
an IOR or PLUS operation. */
static unsigned int
mips_build_lower (struct mips_integer_op *codes, unsigned HOST_WIDE_INT value)
{
unsigned HOST_WIDE_INT high;
unsigned int i;
high = value & ~(unsigned HOST_WIDE_INT) 0xffff;
if (!LUI_OPERAND (high) && (value & 0x18000) == 0x18000)
{
/* The constant is too complex to load with a simple LUI/ORI pair,
so we want to give the recursive call as many trailing zeros as
possible. In this case, we know bit 16 is set and that the
low 16 bits form a negative number. If we subtract that number
from VALUE, we will clear at least the lowest 17 bits, maybe more. */
i = mips_build_integer (codes, CONST_HIGH_PART (value));
codes[i].code = PLUS;
codes[i].value = CONST_LOW_PART (value);
}
else
{
/* Either this is a simple LUI/ORI pair, or clearing the lowest 16
bits gives a value with at least 17 trailing zeros. */
i = mips_build_integer (codes, high);
codes[i].code = IOR;
codes[i].value = value & 0xffff;
}
return i + 1;
}
/* Fill CODES with a sequence of rtl operations to load VALUE.
Return the number of operations needed. */
static unsigned int
mips_build_integer (struct mips_integer_op *codes,
unsigned HOST_WIDE_INT value)
{
if (SMALL_OPERAND (value)
|| SMALL_OPERAND_UNSIGNED (value)
|| LUI_OPERAND (value))
{
/* The value can be loaded with a single instruction. */
codes[0].code = UNKNOWN;
codes[0].value = value;
return 1;
}
else if ((value & 1) != 0 || LUI_OPERAND (CONST_HIGH_PART (value)))
{
/* Either the constant is a simple LUI/ORI combination or its
lowest bit is set. We don't want to shift in this case. */
return mips_build_lower (codes, value);
}
else if ((value & 0xffff) == 0)
{
/* The constant will need at least three actions. The lowest
16 bits are clear, so the final action will be a shift. */
return mips_build_shift (codes, value);
}
else
{
/* The final action could be a shift, add or inclusive OR.
Rather than use a complex condition to select the best
approach, try both mips_build_shift and mips_build_lower
and pick the one that gives the shortest sequence.
Note that this case is only used once per constant. */
struct mips_integer_op alt_codes[MIPS_MAX_INTEGER_OPS];
unsigned int cost, alt_cost;
cost = mips_build_shift (codes, value);
alt_cost = mips_build_lower (alt_codes, value);
if (alt_cost < cost)
{
memcpy (codes, alt_codes, alt_cost * sizeof (codes[0]));
cost = alt_cost;
}
return cost;
}
}
/* Implement TARGET_LEGITIMATE_CONSTANT_P. */
static bool
mips_legitimate_constant_p (machine_mode mode ATTRIBUTE_UNUSED, rtx x)
{
return mips_const_insns (x) > 0;
}
/* Return a SYMBOL_REF for a MIPS16 function called NAME. */
static rtx
mips16_stub_function (const char *name)
{
rtx x;
x = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (name));
SYMBOL_REF_FLAGS (x) |= (SYMBOL_FLAG_EXTERNAL | SYMBOL_FLAG_FUNCTION);
return x;
}
/* Return a legitimate call address for STUB, given that STUB is a MIPS16
support function. */
static rtx
mips16_stub_call_address (mips_one_only_stub *stub)
{
rtx fn = mips16_stub_function (stub->get_name ());
SYMBOL_REF_FLAGS (fn) |= SYMBOL_FLAG_LOCAL;
if (!call_insn_operand (fn, VOIDmode))
fn = force_reg (Pmode, fn);
return fn;
}
/* A stub for moving the thread pointer into TLS_GET_TP_REGNUM. */
class mips16_rdhwr_one_only_stub : public mips_one_only_stub
{
virtual const char *get_name ();
virtual void output_body ();
};
const char *
mips16_rdhwr_one_only_stub::get_name ()
{
return "__mips16_rdhwr";
}
void
mips16_rdhwr_one_only_stub::output_body ()
{
fprintf (asm_out_file,
"\t.set\tpush\n"
"\t.set\tmips32r2\n"
"\t.set\tnoreorder\n"
"\trdhwr\t$3,$29\n"
"\t.set\tpop\n"
"\tj\t$31\n");
}
/* A stub for moving the FCSR into GET_FCSR_REGNUM. */
class mips16_get_fcsr_one_only_stub : public mips_one_only_stub
{
virtual const char *get_name ();
virtual void output_body ();
};
const char *
mips16_get_fcsr_one_only_stub::get_name ()
{
return "__mips16_get_fcsr";
}
void
mips16_get_fcsr_one_only_stub::output_body ()
{
fprintf (asm_out_file,
"\tcfc1\t%s,$31\n"
"\tj\t$31\n", reg_names[GET_FCSR_REGNUM]);
}
/* A stub for moving SET_FCSR_REGNUM into the FCSR. */
class mips16_set_fcsr_one_only_stub : public mips_one_only_stub
{
virtual const char *get_name ();
virtual void output_body ();
};
const char *
mips16_set_fcsr_one_only_stub::get_name ()
{
return "__mips16_set_fcsr";
}
void
mips16_set_fcsr_one_only_stub::output_body ()
{
fprintf (asm_out_file,
"\tctc1\t%s,$31\n"
"\tj\t$31\n", reg_names[SET_FCSR_REGNUM]);
}
/* Return true if symbols of type TYPE require a GOT access. */
static bool
mips_got_symbol_type_p (enum mips_symbol_type type)
{
switch (type)
{
case SYMBOL_GOT_PAGE_OFST:
case SYMBOL_GOT_DISP:
return true;
default:
return false;
}
}
/* Return true if X is a thread-local symbol. */
static bool
mips_tls_symbol_p (rtx x)
{
return GET_CODE (x) == SYMBOL_REF && SYMBOL_REF_TLS_MODEL (x) != 0;
}
/* Return true if SYMBOL_REF X is associated with a global symbol
(in the STB_GLOBAL sense). */
static bool
mips_global_symbol_p (const_rtx x)
{
const_tree decl = SYMBOL_REF_DECL (x);
if (!decl)
return !SYMBOL_REF_LOCAL_P (x) || SYMBOL_REF_EXTERNAL_P (x);
/* Weakref symbols are not TREE_PUBLIC, but their targets are global
or weak symbols. Relocations in the object file will be against
the target symbol, so it's that symbol's binding that matters here. */
return DECL_P (decl) && (TREE_PUBLIC (decl) || DECL_WEAK (decl));
}
/* Return true if function X is a libgcc MIPS16 stub function. */
static bool
mips16_stub_function_p (const_rtx x)
{
return (GET_CODE (x) == SYMBOL_REF
&& startswith (XSTR (x, 0), "__mips16_"));
}
/* Return true if function X is a locally-defined and locally-binding
MIPS16 function. */
static bool
mips16_local_function_p (const_rtx x)
{
return (GET_CODE (x) == SYMBOL_REF
&& SYMBOL_REF_LOCAL_P (x)
&& !SYMBOL_REF_EXTERNAL_P (x)
&& (mips_get_compress_mode (SYMBOL_REF_DECL (x)) & MASK_MIPS16));
}
/* Return true if SYMBOL_REF X binds locally. */
static bool
mips_symbol_binds_local_p (const_rtx x)
{
return (SYMBOL_REF_DECL (x)
? targetm.binds_local_p (SYMBOL_REF_DECL (x))
: SYMBOL_REF_LOCAL_P (x));
}
/* Return true if OP is a constant vector with the number of units in MODE,
and each unit has the same bit set. */
bool
mips_const_vector_bitimm_set_p (rtx op, machine_mode mode)
{
if (GET_CODE (op) == CONST_VECTOR && op != CONST0_RTX (mode))
{
unsigned HOST_WIDE_INT val = UINTVAL (CONST_VECTOR_ELT (op, 0));
int vlog2 = exact_log2 (val & GET_MODE_MASK (GET_MODE_INNER (mode)));
if (vlog2 != -1)
{
gcc_assert (GET_MODE_CLASS (mode) == MODE_VECTOR_INT);
gcc_assert (vlog2 >= 0 && vlog2 <= GET_MODE_UNIT_BITSIZE (mode) - 1);
return mips_const_vector_same_val_p (op, mode);
}
}
return false;
}
/* Return true if OP is a constant vector with the number of units in MODE,
and each unit has the same bit clear. */
bool
mips_const_vector_bitimm_clr_p (rtx op, machine_mode mode)
{
if (GET_CODE (op) == CONST_VECTOR && op != CONSTM1_RTX (mode))
{
unsigned HOST_WIDE_INT val = ~UINTVAL (CONST_VECTOR_ELT (op, 0));
int vlog2 = exact_log2 (val & GET_MODE_MASK (GET_MODE_INNER (mode)));
if (vlog2 != -1)
{
gcc_assert (GET_MODE_CLASS (mode) == MODE_VECTOR_INT);
gcc_assert (vlog2 >= 0 && vlog2 <= GET_MODE_UNIT_BITSIZE (mode) - 1);
return mips_const_vector_same_val_p (op, mode);
}
}
return false;
}
/* Return true if OP is a constant vector with the number of units in MODE,
and each unit has the same value. */
bool
mips_const_vector_same_val_p (rtx op, machine_mode mode)
{
int i, nunits = GET_MODE_NUNITS (mode);
rtx first;
if (GET_CODE (op) != CONST_VECTOR || GET_MODE (op) != mode)
return false;
first = CONST_VECTOR_ELT (op, 0);
for (i = 1; i < nunits; i++)
if (!rtx_equal_p (first, CONST_VECTOR_ELT (op, i)))
return false;
return true;
}
/* Return true if OP is a constant vector with the number of units in MODE,
and each unit has the same value as well as replicated bytes in the value.
*/
bool
mips_const_vector_same_bytes_p (rtx op, machine_mode mode)
{
int i, bytes;
HOST_WIDE_INT val, first_byte;
rtx first;
if (!mips_const_vector_same_val_p (op, mode))
return false;
first = CONST_VECTOR_ELT (op, 0);
bytes = GET_MODE_UNIT_SIZE (mode);
val = INTVAL (first);
first_byte = val & 0xff;
for (i = 1; i < bytes; i++)
{
val >>= 8;
if ((val & 0xff) != first_byte)
return false;
}
return true;
}
/* Return true if OP is a constant vector with the number of units in MODE,
and each unit has the same integer value in the range [LOW, HIGH]. */
bool
mips_const_vector_same_int_p (rtx op, machine_mode mode, HOST_WIDE_INT low,
HOST_WIDE_INT high)
{
HOST_WIDE_INT value;
rtx elem0;
if (!mips_const_vector_same_val_p (op, mode))
return false;
elem0 = CONST_VECTOR_ELT (op, 0);
if (!CONST_INT_P (elem0))
return false;
value = INTVAL (elem0);
return (value >= low && value <= high);
}
/* Return true if OP is a constant vector with repeated 4-element sets
in mode MODE. */
bool
mips_const_vector_shuffle_set_p (rtx op, machine_mode mode)
{
int nunits = GET_MODE_NUNITS (mode);
int nsets = nunits / 4;
int set = 0;
int i, j;
/* Check if we have the same 4-element sets. */
for (j = 0; j < nsets; j++, set = 4 * j)
for (i = 0; i < 4; i++)
if ((INTVAL (XVECEXP (op, 0, i))
!= (INTVAL (XVECEXP (op, 0, set + i)) - set))
|| !IN_RANGE (INTVAL (XVECEXP (op, 0, set + i)), 0, set + 3))
return false;
return true;
}
/* Return true if rtx constants of mode MODE should be put into a small
data section. */
static bool
mips_rtx_constant_in_small_data_p (machine_mode mode)
{
return (!TARGET_EMBEDDED_DATA
&& TARGET_LOCAL_SDATA
&& GET_MODE_SIZE (mode) <= mips_small_data_threshold);
}
/* Return true if X should not be moved directly into register $25.
We need this because many versions of GAS will treat "la $25,foo" as
part of a call sequence and so allow a global "foo" to be lazily bound. */
bool
mips_dangerous_for_la25_p (rtx x)
{
return (!TARGET_EXPLICIT_RELOCS
&& TARGET_USE_GOT
&& GET_CODE (x) == SYMBOL_REF
&& mips_global_symbol_p (x));
}
/* Return true if calls to X might need $25 to be valid on entry. */
bool
mips_use_pic_fn_addr_reg_p (const_rtx x)
{
if (!TARGET_USE_PIC_FN_ADDR_REG)
return false;
/* MIPS16 stub functions are guaranteed not to use $25. */
if (mips16_stub_function_p (x))
return false;
if (GET_CODE (x) == SYMBOL_REF)
{
/* If PLTs and copy relocations are available, the static linker
will make sure that $25 is valid on entry to the target function. */
if (TARGET_ABICALLS_PIC0)
return false;
/* Locally-defined functions use absolute accesses to set up
the global pointer. */
if (TARGET_ABSOLUTE_ABICALLS
&& mips_symbol_binds_local_p (x)
&& !SYMBOL_REF_EXTERNAL_P (x))
return false;
}
return true;
}
/* Return the method that should be used to access SYMBOL_REF or
LABEL_REF X in context CONTEXT. */
static enum mips_symbol_type
mips_classify_symbol (const_rtx x, enum mips_symbol_context context)
{
if (TARGET_RTP_PIC)
return SYMBOL_GOT_DISP;
if (GET_CODE (x) == LABEL_REF)
{
/* Only return SYMBOL_PC_RELATIVE if we are generating MIPS16
code and if we know that the label is in the current function's
text section. LABEL_REFs are used for jump tables as well as
text labels, so we must check whether jump tables live in the
text section. */
if (TARGET_MIPS16_SHORT_JUMP_TABLES
&& !LABEL_REF_NONLOCAL_P (x))
return SYMBOL_PC_RELATIVE;
if (TARGET_ABICALLS && !TARGET_ABSOLUTE_ABICALLS)
return SYMBOL_GOT_PAGE_OFST;
return SYMBOL_ABSOLUTE;
}
gcc_assert (GET_CODE (x) == SYMBOL_REF);
if (SYMBOL_REF_TLS_MODEL (x))
return SYMBOL_TLS;
if (CONSTANT_POOL_ADDRESS_P (x))
{
if (TARGET_MIPS16_TEXT_LOADS)
return SYMBOL_PC_RELATIVE;
if (TARGET_MIPS16_PCREL_LOADS && context == SYMBOL_CONTEXT_MEM)
return SYMBOL_PC_RELATIVE;
if (mips_rtx_constant_in_small_data_p (get_pool_mode (x)))
return SYMBOL_GP_RELATIVE;
}
/* Do not use small-data accesses for weak symbols; they may end up
being zero. */
if (TARGET_GPOPT && SYMBOL_REF_SMALL_P (x) && !SYMBOL_REF_WEAK (x))
return SYMBOL_GP_RELATIVE;
/* Don't use GOT accesses for locally-binding symbols when -mno-shared
is in effect. */
if (TARGET_ABICALLS_PIC2
&& !(TARGET_ABSOLUTE_ABICALLS && mips_symbol_binds_local_p (x)))
{
/* There are three cases to consider:
- o32 PIC (either with or without explicit relocs)
- n32/n64 PIC without explicit relocs
- n32/n64 PIC with explicit relocs
In the first case, both local and global accesses will use an
R_MIPS_GOT16 relocation. We must correctly predict which of
the two semantics (local or global) the assembler and linker
will apply. The choice depends on the symbol's binding rather
than its visibility.
In the second case, the assembler will not use R_MIPS_GOT16
relocations, but it chooses between local and global accesses
in the same way as for o32 PIC.
In the third case we have more freedom since both forms of
access will work for any kind of symbol. However, there seems
little point in doing things differently. */
if (mips_global_symbol_p (x))
return SYMBOL_GOT_DISP;
return SYMBOL_GOT_PAGE_OFST;
}
return SYMBOL_ABSOLUTE;
}
/* Classify the base of symbolic expression X, given that X appears in
context CONTEXT. */
static enum mips_symbol_type
mips_classify_symbolic_expression (rtx x, enum mips_symbol_context context)
{
rtx offset;
split_const (x, &x, &offset);
if (UNSPEC_ADDRESS_P (x))
return UNSPEC_ADDRESS_TYPE (x);
return mips_classify_symbol (x, context);
}
/* Return true if OFFSET is within the range [0, ALIGN), where ALIGN
is the alignment in bytes of SYMBOL_REF X. */
static bool
mips_offset_within_alignment_p (rtx x, HOST_WIDE_INT offset)
{
HOST_WIDE_INT align;
align = SYMBOL_REF_DECL (x) ? DECL_ALIGN_UNIT (SYMBOL_REF_DECL (x)) : 1;
return IN_RANGE (offset, 0, align - 1);
}
/* Return true if X is a symbolic constant that can be used in context
CONTEXT. If it is, store the type of the symbol in *SYMBOL_TYPE. */
bool
mips_symbolic_constant_p (rtx x, enum mips_symbol_context context,
enum mips_symbol_type *symbol_type)
{
rtx offset;
split_const (x, &x, &offset);
if (UNSPEC_ADDRESS_P (x))
{
*symbol_type = UNSPEC_ADDRESS_TYPE (x);
x = UNSPEC_ADDRESS (x);
}
else if (GET_CODE (x) == SYMBOL_REF || GET_CODE (x) == LABEL_REF)
{
*symbol_type = mips_classify_symbol (x, context);
if (*symbol_type == SYMBOL_TLS)
return false;
}
else
return false;
if (offset == const0_rtx)
return true;
/* Check whether a nonzero offset is valid for the underlying
relocations. */
switch (*symbol_type)
{
case SYMBOL_ABSOLUTE:
case SYMBOL_64_HIGH:
case SYMBOL_64_MID:
case SYMBOL_64_LOW:
/* If the target has 64-bit pointers and the object file only
supports 32-bit symbols, the values of those symbols will be
sign-extended. In this case we can't allow an arbitrary offset
in case the 32-bit value X + OFFSET has a different sign from X. */
if (Pmode == DImode && !ABI_HAS_64BIT_SYMBOLS)
return offset_within_block_p (x, INTVAL (offset));
/* In other cases the relocations can handle any offset. */
return true;
case SYMBOL_PC_RELATIVE:
/* Allow constant pool references to be converted to LABEL+CONSTANT.
In this case, we no longer have access to the underlying constant,
but the original symbol-based access was known to be valid. */
if (GET_CODE (x) == LABEL_REF)
return true;
/* Fall through. */
case SYMBOL_GP_RELATIVE:
/* Make sure that the offset refers to something within the
same object block. This should guarantee that the final
PC- or GP-relative offset is within the 16-bit limit. */
return offset_within_block_p (x, INTVAL (offset));
case SYMBOL_GOT_PAGE_OFST:
case SYMBOL_GOTOFF_PAGE:
/* If the symbol is global, the GOT entry will contain the symbol's
address, and we will apply a 16-bit offset after loading it.
If the symbol is local, the linker should provide enough local
GOT entries for a 16-bit offset, but larger offsets may lead
to GOT overflow. */
return SMALL_INT (offset);
case SYMBOL_TPREL:
case SYMBOL_DTPREL:
/* There is no carry between the HI and LO REL relocations, so the
offset is only valid if we know it won't lead to such a carry. */
return mips_offset_within_alignment_p (x, INTVAL (offset));
case SYMBOL_GOT_DISP:
case SYMBOL_GOTOFF_DISP:
case SYMBOL_GOTOFF_CALL:
case SYMBOL_GOTOFF_LOADGP:
case SYMBOL_TLSGD:
case SYMBOL_TLSLDM:
case SYMBOL_GOTTPREL:
case SYMBOL_TLS:
case SYMBOL_HALF:
return false;
}
gcc_unreachable ();
}
/* Like mips_symbol_insns, but treat extended MIPS16 instructions as a
single instruction. We rely on the fact that, in the worst case,
all instructions involved in a MIPS16 address calculation are usually
extended ones. */
static int
mips_symbol_insns_1 (enum mips_symbol_type type, machine_mode mode)
{
if (mips_use_pcrel_pool_p[(int) type])
{
if (mode == MAX_MACHINE_MODE)
/* LEAs will be converted into constant-pool references by
mips_reorg. */
type = SYMBOL_PC_RELATIVE;
else
/* The constant must be loaded and then dereferenced. */
return 0;
}
switch (type)
{
case SYMBOL_ABSOLUTE:
/* When using 64-bit symbols, we need 5 preparatory instructions,
such as:
lui $at,%highest(symbol)
daddiu $at,$at,%higher(symbol)
dsll $at,$at,16
daddiu $at,$at,%hi(symbol)
dsll $at,$at,16
The final address is then $at + %lo(symbol). With 32-bit
symbols we just need a preparatory LUI for normal mode and
a preparatory LI and SLL for MIPS16. */
return ABI_HAS_64BIT_SYMBOLS ? 6 : TARGET_MIPS16 ? 3 : 2;
case SYMBOL_GP_RELATIVE:
/* Treat GP-relative accesses as taking a single instruction on
MIPS16 too; the copy of $gp can often be shared. */
return 1;
case SYMBOL_PC_RELATIVE:
/* PC-relative constants can be only be used with ADDIUPC,
DADDIUPC, LWPC and LDPC. */
if (mode == MAX_MACHINE_MODE
|| GET_MODE_SIZE (mode) == 4
|| GET_MODE_SIZE (mode) == 8)
return 1;
/* The constant must be loaded using ADDIUPC or DADDIUPC first. */
return 0;
case SYMBOL_GOT_DISP:
/* The constant will have to be loaded from the GOT before it
is used in an address. */
if (mode != MAX_MACHINE_MODE)
return 0;
/* Fall through. */
case SYMBOL_GOT_PAGE_OFST:
/* Unless -funit-at-a-time is in effect, we can't be sure whether the
local/global classification is accurate. The worst cases are:
(1) For local symbols when generating o32 or o64 code. The assembler
will use:
lw $at,%got(symbol)
nop
...and the final address will be $at + %lo(symbol).
(2) For global symbols when -mxgot. The assembler will use:
lui $at,%got_hi(symbol)
(d)addu $at,$at,$gp
...and the final address will be $at + %got_lo(symbol). */
return 3;
case SYMBOL_GOTOFF_PAGE:
case SYMBOL_GOTOFF_DISP:
case SYMBOL_GOTOFF_CALL:
case SYMBOL_GOTOFF_LOADGP:
case SYMBOL_64_HIGH:
case SYMBOL_64_MID:
case SYMBOL_64_LOW:
case SYMBOL_TLSGD:
case SYMBOL_TLSLDM:
case SYMBOL_DTPREL:
case SYMBOL_GOTTPREL:
case SYMBOL_TPREL:
case SYMBOL_HALF:
/* A 16-bit constant formed by a single relocation, or a 32-bit
constant formed from a high 16-bit relocation and a low 16-bit
relocation. Use mips_split_p to determine which. 32-bit
constants need an "lui; addiu" sequence for normal mode and
an "li; sll; addiu" sequence for MIPS16 mode. */
return !mips_split_p[type] ? 1 : TARGET_MIPS16 ? 3 : 2;
case SYMBOL_TLS:
/* We don't treat a bare TLS symbol as a constant. */
return 0;
}
gcc_unreachable ();
}
/* If MODE is MAX_MACHINE_MODE, return the number of instructions needed
to load symbols of type TYPE into a register. Return 0 if the given
type of symbol cannot be used as an immediate operand.
Otherwise, return the number of instructions needed to load or store
values of mode MODE to or from addresses of type TYPE. Return 0 if
the given type of symbol is not valid in addresses.
In both cases, instruction counts are based off BASE_INSN_LENGTH. */
static int
mips_symbol_insns (enum mips_symbol_type type, machine_mode mode)
{
/* MSA LD.* and ST.* cannot support loading symbols via an immediate
operand. */
if (mode != MAX_MACHINE_MODE && MSA_SUPPORTED_MODE_P (mode))
return 0;
return mips_symbol_insns_1 (type, mode) * (TARGET_MIPS16 ? 2 : 1);
}
/* Implement TARGET_CANNOT_FORCE_CONST_MEM. */
static bool
mips_cannot_force_const_mem (machine_mode mode, rtx x)
{
enum mips_symbol_type type;
rtx base, offset;
/* There is no assembler syntax for expressing an address-sized
high part. */
if (GET_CODE (x) == HIGH)
return true;
/* As an optimization, reject constants that mips_legitimize_move
can expand inline.
Suppose we have a multi-instruction sequence that loads constant C
into register R. If R does not get allocated a hard register, and
R is used in an operand that allows both registers and memory
references, reload will consider forcing C into memory and using
one of the instruction's memory alternatives. Returning false
here will force it to use an input reload instead. */
if ((CONST_INT_P (x) || GET_CODE (x) == CONST_VECTOR)
&& mips_legitimate_constant_p (mode, x))
return true;
split_const (x, &base, &offset);
if (mips_symbolic_constant_p (base, SYMBOL_CONTEXT_LEA, &type))
{
/* See whether we explicitly want these symbols in the pool. */
if (mips_use_pcrel_pool_p[(int) type])
return false;
/* The same optimization as for CONST_INT. */
if (SMALL_INT (offset) && mips_symbol_insns (type, MAX_MACHINE_MODE) > 0)
return true;
/* If MIPS16 constant pools live in the text section, they should
not refer to anything that might need run-time relocation. */
if (TARGET_MIPS16_PCREL_LOADS && mips_got_symbol_type_p (type))
return true;
}
/* TLS symbols must be computed by mips_legitimize_move. */
if (tls_referenced_p (x))
return true;
return false;
}
/* Implement TARGET_USE_BLOCKS_FOR_CONSTANT_P. We can't use blocks for
constants when we're using a per-function constant pool. */
static bool
mips_use_blocks_for_constant_p (machine_mode mode ATTRIBUTE_UNUSED,
const_rtx x ATTRIBUTE_UNUSED)
{
return !TARGET_MIPS16_PCREL_LOADS;
}
/* Return true if register REGNO is a valid base register for mode MODE.
STRICT_P is true if REG_OK_STRICT is in effect. */
int
mips_regno_mode_ok_for_base_p (int regno, machine_mode mode,
bool strict_p)
{
if (!HARD_REGISTER_NUM_P (regno))
{
if (!strict_p)
return true;
regno = reg_renumber[regno];
}
/* These fake registers will be eliminated to either the stack or
hard frame pointer, both of which are usually valid base registers.
Reload deals with the cases where the eliminated form isn't valid. */
if (regno == ARG_POINTER_REGNUM || regno == FRAME_POINTER_REGNUM)
return true;
/* In MIPS16 mode, the stack pointer can only address word and doubleword
values, nothing smaller. */
if (TARGET_MIPS16 && regno == STACK_POINTER_REGNUM)
return GET_MODE_SIZE (mode) == 4 || GET_MODE_SIZE (mode) == 8;
return TARGET_MIPS16 ? M16_REG_P (regno) : GP_REG_P (regno);
}
/* Return true if X is a valid base register for mode MODE.
STRICT_P is true if REG_OK_STRICT is in effect. */
static bool
mips_valid_base_register_p (rtx x, machine_mode mode, bool strict_p)
{
if (!strict_p && GET_CODE (x) == SUBREG)
x = SUBREG_REG (x);
return (REG_P (x)
&& mips_regno_mode_ok_for_base_p (REGNO (x), mode, strict_p));
}
/* Return true if, for every base register BASE_REG, (plus BASE_REG X)
can address a value of mode MODE. */
static bool
mips_valid_offset_p (rtx x, machine_mode mode)
{
/* Check that X is a signed 16-bit number. */
if (!const_arith_operand (x, Pmode))
return false;
/* We may need to split multiword moves, so make sure that every word
is accessible. */
if (GET_MODE_SIZE (mode) > UNITS_PER_WORD
&& !SMALL_OPERAND (INTVAL (x) + GET_MODE_SIZE (mode) - UNITS_PER_WORD))
return false;
/* MSA LD.* and ST.* supports 10-bit signed offsets. */
if (MSA_SUPPORTED_MODE_P (mode)
&& !mips_signed_immediate_p (INTVAL (x), 10,
mips_ldst_scaled_shift (mode)))
return false;
return true;
}
/* Return true if a LO_SUM can address a value of mode MODE when the
LO_SUM symbol has type SYMBOL_TYPE. */
static bool
mips_valid_lo_sum_p (enum mips_symbol_type symbol_type, machine_mode mode)
{
/* Check that symbols of type SYMBOL_TYPE can be used to access values
of mode MODE. */
if (mips_symbol_insns (symbol_type, mode) == 0)
return false;
/* Check that there is a known low-part relocation. */
if (mips_lo_relocs[symbol_type] == NULL)
return false;
/* We may need to split multiword moves, so make sure that each word
can be accessed without inducing a carry. This is mainly needed
for o64, which has historically only guaranteed 64-bit alignment
for 128-bit types. */
if (GET_MODE_SIZE (mode) > UNITS_PER_WORD
&& GET_MODE_BITSIZE (mode) > GET_MODE_ALIGNMENT (mode))
return false;
/* MSA LD.* and ST.* cannot support loading symbols via %lo($base). */
if (MSA_SUPPORTED_MODE_P (mode))
return false;
return true;
}
/* Return true if X is a valid address for machine mode MODE. If it is,
fill in INFO appropriately. STRICT_P is true if REG_OK_STRICT is in
effect. */
static bool
mips_classify_address (struct mips_address_info *info, rtx x,
machine_mode mode, bool strict_p)
{
switch (GET_CODE (x))
{
case REG:
case SUBREG:
info->type = ADDRESS_REG;
info->reg = x;
info->offset = const0_rtx;
return mips_valid_base_register_p (info->reg, mode, strict_p);
case PLUS:
info->type = ADDRESS_REG;
info->reg = XEXP (x, 0);
info->offset = XEXP (x, 1);
return (mips_valid_base_register_p (info->reg, mode, strict_p)
&& mips_valid_offset_p (info->offset, mode));
case LO_SUM:
info->type = ADDRESS_LO_SUM;
info->reg = XEXP (x, 0);
info->offset = XEXP (x, 1);
/* We have to trust the creator of the LO_SUM to do something vaguely
sane. Target-independent code that creates a LO_SUM should also
create and verify the matching HIGH. Target-independent code that
adds an offset to a LO_SUM must prove that the offset will not
induce a carry. Failure to do either of these things would be
a bug, and we are not required to check for it here. The MIPS
backend itself should only create LO_SUMs for valid symbolic
constants, with the high part being either a HIGH or a copy
of _gp. */
info->symbol_type
= mips_classify_symbolic_expression (info->offset, SYMBOL_CONTEXT_MEM);
return (mips_valid_base_register_p (info->reg, mode, strict_p)
&& mips_valid_lo_sum_p (info->symbol_type, mode));
case CONST_INT:
/* Small-integer addresses don't occur very often, but they
are legitimate if $0 is a valid base register. */
info->type = ADDRESS_CONST_INT;
return !TARGET_MIPS16 && SMALL_INT (x);
case CONST:
case LABEL_REF:
case SYMBOL_REF:
info->type = ADDRESS_SYMBOLIC;
return (mips_symbolic_constant_p (x, SYMBOL_CONTEXT_MEM,
&info->symbol_type)
&& mips_symbol_insns (info->symbol_type, mode) > 0
&& !mips_split_p[info->symbol_type]);
default:
return false;
}
}
/* Implement TARGET_LEGITIMATE_ADDRESS_P. */
static bool
mips_legitimate_address_p (machine_mode mode, rtx x, bool strict_p)
{
struct mips_address_info addr;
return mips_classify_address (&addr, x, mode, strict_p);
}
/* Return true if X is a legitimate $sp-based address for mode MODE. */
bool
mips_stack_address_p (rtx x, machine_mode mode)
{
struct mips_address_info addr;
return (mips_classify_address (&addr, x, mode, false)
&& addr.type == ADDRESS_REG
&& addr.reg == stack_pointer_rtx);
}
/* Return true if ADDR matches the pattern for the LWXS load scaled indexed
address instruction. Note that such addresses are not considered
legitimate in the TARGET_LEGITIMATE_ADDRESS_P sense, because their use
is so restricted. */
static bool
mips_lwxs_address_p (rtx addr)
{
if (ISA_HAS_LWXS
&& GET_CODE (addr) == PLUS
&& REG_P (XEXP (addr, 1)))
{
rtx offset = XEXP (addr, 0);
if (GET_CODE (offset) == MULT
&& REG_P (XEXP (offset, 0))
&& CONST_INT_P (XEXP (offset, 1))
&& INTVAL (XEXP (offset, 1)) == 4)
return true;
}
return false;
}
/* Return true if ADDR matches the pattern for the L{B,H,W,D}{,U}X load
indexed address instruction. Note that such addresses are
not considered legitimate in the TARGET_LEGITIMATE_ADDRESS_P
sense, because their use is so restricted. */
static bool
mips_lx_address_p (rtx addr, machine_mode mode)
{
if (GET_CODE (addr) != PLUS
|| !REG_P (XEXP (addr, 0))
|| !REG_P (XEXP (addr, 1)))
return false;
if (ISA_HAS_LBX && mode == QImode)
return true;
if (ISA_HAS_LHX && mode == HImode)
return true;
if (ISA_HAS_LWX && mode == SImode)
return true;
if (ISA_HAS_LDX && mode == DImode)
return true;
if (MSA_SUPPORTED_MODE_P (mode))
return true;
return false;
}
/* Return true if a value at OFFSET bytes from base register BASE can be
accessed using an unextended MIPS16 instruction. MODE is the mode of
the value.
Usually the offset in an unextended instruction is a 5-bit field.
The offset is unsigned and shifted left once for LH and SH, twice
for LW and SW, and so on. An exception is LWSP and SWSP, which have
an 8-bit immediate field that's shifted left twice. */
static bool
mips16_unextended_reference_p (machine_mode mode, rtx base,
unsigned HOST_WIDE_INT offset)
{
if (mode != BLKmode && offset % GET_MODE_SIZE (mode) == 0)
{
if (GET_MODE_SIZE (mode) == 4 && base == stack_pointer_rtx)
return offset < 256U * GET_MODE_SIZE (mode);
return offset < 32U * GET_MODE_SIZE (mode);
}
return false;
}
/* Return the number of instructions needed to load or store a value
of mode MODE at address X, assuming that BASE_INSN_LENGTH is the
length of one instruction. Return 0 if X isn't valid for MODE.
Assume that multiword moves may need to be split into word moves
if MIGHT_SPLIT_P, otherwise assume that a single load or store is
enough. */
int
mips_address_insns (rtx x, machine_mode mode, bool might_split_p)
{
struct mips_address_info addr;
int factor;
bool msa_p = (!might_split_p && MSA_SUPPORTED_MODE_P (mode));
/* BLKmode is used for single unaligned loads and stores and should
not count as a multiword mode. (GET_MODE_SIZE (BLKmode) is pretty
meaningless, so we have to single it out as a special case one way
or the other.) */
if (mode != BLKmode && might_split_p)
factor = (GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
else
factor = 1;
if (mips_classify_address (&addr, x, mode, false))
switch (addr.type)
{
case ADDRESS_REG:
if (msa_p)
{
/* MSA LD.* and ST.* supports 10-bit signed offsets. */
if (mips_signed_immediate_p (INTVAL (addr.offset), 10,
mips_ldst_scaled_shift (mode)))
return 1;
else
return 0;
}
if (TARGET_MIPS16
&& !mips16_unextended_reference_p (mode, addr.reg,
UINTVAL (addr.offset)))
return factor * 2;
return factor;
case ADDRESS_LO_SUM:
return msa_p ? 0 : TARGET_MIPS16 ? factor * 2 : factor;
case ADDRESS_CONST_INT:
return msa_p ? 0 : factor;
case ADDRESS_SYMBOLIC:
return msa_p ? 0 : factor * mips_symbol_insns (addr.symbol_type, mode);
}
return 0;
}
/* Return true if X fits within an unsigned field of BITS bits that is
shifted left SHIFT bits before being used. */
bool
mips_unsigned_immediate_p (unsigned HOST_WIDE_INT x, int bits, int shift = 0)
{
return (x & ((1 << shift) - 1)) == 0 && x < ((unsigned) 1 << (shift + bits));
}
/* Return true if X fits within a signed field of BITS bits that is
shifted left SHIFT bits before being used. */
bool
mips_signed_immediate_p (unsigned HOST_WIDE_INT x, int bits, int shift = 0)
{
x += 1 << (bits + shift - 1);
return mips_unsigned_immediate_p (x, bits, shift);
}
/* Return the scale shift that applied to MSA LD/ST address offset. */
int
mips_ldst_scaled_shift (machine_mode mode)
{
int shift = exact_log2 (GET_MODE_UNIT_SIZE (mode));
if (shift < 0 || shift > 8)
gcc_unreachable ();
return shift;
}
/* Return true if X is legitimate for accessing values of mode MODE,
if it is based on a MIPS16 register, and if the offset satisfies
OFFSET_PREDICATE. */
bool
m16_based_address_p (rtx x, machine_mode mode,
insn_operand_predicate_fn offset_predicate)
{
struct mips_address_info addr;
return (mips_classify_address (&addr, x, mode, false)
&& addr.type == ADDRESS_REG
&& M16_REG_P (REGNO (addr.reg))
&& offset_predicate (addr.offset, mode));
}
/* Return true if X is a legitimate address that conforms to the requirements
for a microMIPS LWSP or SWSP insn. */
bool
lwsp_swsp_address_p (rtx x, machine_mode mode)
{
struct mips_address_info addr;
return (mips_classify_address (&addr, x, mode, false)
&& addr.type == ADDRESS_REG
&& REGNO (addr.reg) == STACK_POINTER_REGNUM
&& uw5_operand (addr.offset, mode));
}
/* Return true if X is a legitimate address with a 12-bit offset.
MODE is the mode of the value being accessed. */
bool
umips_12bit_offset_address_p (rtx x, machine_mode mode)
{
struct mips_address_info addr;
return (mips_classify_address (&addr, x, mode, false)
&& addr.type == ADDRESS_REG
&& CONST_INT_P (addr.offset)
&& UMIPS_12BIT_OFFSET_P (INTVAL (addr.offset)));
}
/* Return true if X is a legitimate address with a 9-bit offset.
MODE is the mode of the value being accessed. */
bool
mips_9bit_offset_address_p (rtx x, machine_mode mode)
{
struct mips_address_info addr;
return (mips_classify_address (&addr, x, mode, false)
&& addr.type == ADDRESS_REG
&& CONST_INT_P (addr.offset)
&& MIPS_9BIT_OFFSET_P (INTVAL (addr.offset)));
}
/* Return the number of instructions needed to load constant X,
assuming that BASE_INSN_LENGTH is the length of one instruction.
Return 0 if X isn't a valid constant. */
int
mips_const_insns (rtx x)
{
struct mips_integer_op codes[MIPS_MAX_INTEGER_OPS];
enum mips_symbol_type symbol_type;
rtx offset;
switch (GET_CODE (x))
{
case HIGH:
if (!mips_symbolic_constant_p (XEXP (x, 0), SYMBOL_CONTEXT_LEA,
&symbol_type)
|| !mips_split_p[symbol_type])
return 0;
/* This is simply an LUI for normal mode. It is an extended
LI followed by an extended SLL for MIPS16. */
return TARGET_MIPS16 ? 4 : 1;
case CONST_INT:
if (TARGET_MIPS16)
/* Unsigned 8-bit constants can be loaded using an unextended
LI instruction. Unsigned 16-bit constants can be loaded
using an extended LI. Negative constants must be loaded
using LI and then negated. */
return (IN_RANGE (INTVAL (x), 0, 255) ? 1
: SMALL_OPERAND_UNSIGNED (INTVAL (x)) ? 2
: IN_RANGE (-INTVAL (x), 0, 255) ? 2
: SMALL_OPERAND_UNSIGNED (-INTVAL (x)) ? 3
: 0);
return mips_build_integer (codes, INTVAL (x));
case CONST_VECTOR:
if (MSA_SUPPORTED_MODE_P (GET_MODE (x))
&& mips_const_vector_same_int_p (x, GET_MODE (x), -512, 511))
return 1;
/* Fall through. */
case CONST_DOUBLE:
/* Allow zeros for normal mode, where we can use $0. */
return !TARGET_MIPS16 && x == CONST0_RTX (GET_MODE (x)) ? 1 : 0;
case CONST:
if (CONST_GP_P (x))
return 1;
/* See if we can refer to X directly. */
if (mips_symbolic_constant_p (x, SYMBOL_CONTEXT_LEA, &symbol_type))
return mips_symbol_insns (symbol_type, MAX_MACHINE_MODE);
/* Otherwise try splitting the constant into a base and offset.
If the offset is a 16-bit value, we can load the base address
into a register and then use (D)ADDIU to add in the offset.
If the offset is larger, we can load the base and offset
into separate registers and add them together with (D)ADDU.
However, the latter is only possible before reload; during
and after reload, we must have the option of forcing the
constant into the pool instead. */
split_const (x, &x, &offset);
if (offset != 0)
{
int n = mips_const_insns (x);
if (n != 0)
{
if (SMALL_INT (offset))
return n + 1;
else if (!targetm.cannot_force_const_mem (GET_MODE (x), x))
return n + 1 + mips_build_integer (codes, INTVAL (offset));
}
}
return 0;
case SYMBOL_REF:
case LABEL_REF:
return mips_symbol_insns (mips_classify_symbol (x, SYMBOL_CONTEXT_LEA),
MAX_MACHINE_MODE);
default:
return 0;
}
}
/* X is a doubleword constant that can be handled by splitting it into
two words and loading each word separately. Return the number of
instructions required to do this, assuming that BASE_INSN_LENGTH
is the length of one instruction. */
int
mips_split_const_insns (rtx x)
{
unsigned int low, high;
low = mips_const_insns (mips_subword (x, false));
high = mips_const_insns (mips_subword (x, true));
gcc_assert (low > 0 && high > 0);
return low + high;
}
/* Return one word of 128-bit value OP, taking into account the fixed
endianness of certain registers. BYTE selects from the byte address. */
rtx
mips_subword_at_byte (rtx op, unsigned int byte)
{
machine_mode mode;
mode = GET_MODE (op);
if (mode == VOIDmode)
mode = TImode;
gcc_assert (!FP_REG_RTX_P (op));
if (MEM_P (op))
return mips_rewrite_small_data (adjust_address (op, word_mode, byte));
return simplify_gen_subreg (word_mode, op, mode, byte);
}
/* Return the number of instructions needed to implement INSN,
given that it loads from or stores to MEM. Assume that
BASE_INSN_LENGTH is the length of one instruction. */
int
mips_load_store_insns (rtx mem, rtx_insn *insn)
{
machine_mode mode;
bool might_split_p;
rtx set;
gcc_assert (MEM_P (mem));
mode = GET_MODE (mem);
/* Try to prove that INSN does not need to be split. */
might_split_p = GET_MODE_SIZE (mode) > UNITS_PER_WORD;
if (might_split_p)
{
set = single_set (insn);
if (set && !mips_split_move_insn_p (SET_DEST (set), SET_SRC (set), insn))
might_split_p = false;
}
return mips_address_insns (XEXP (mem, 0), mode, might_split_p);
}
/* Return the number of instructions needed for an integer division,
assuming that BASE_INSN_LENGTH is the length of one instruction. */
int
mips_idiv_insns (machine_mode mode)
{
int count;
count = 1;
if (TARGET_CHECK_ZERO_DIV)
{
if (GENERATE_DIVIDE_TRAPS && !MSA_SUPPORTED_MODE_P (mode))
count++;
else
count += 2;
}
if (TARGET_FIX_R4000 || TARGET_FIX_R4400)
count++;
return count;
}
/* Emit a move from SRC to DEST. Assume that the move expanders can
handle all moves if !can_create_pseudo_p (). The distinction is
important because, unlike emit_move_insn, the move expanders know
how to force Pmode objects into the constant pool even when the
constant pool address is not itself legitimate. */
rtx_insn *
mips_emit_move (rtx dest, rtx src)
{
return (can_create_pseudo_p ()
? emit_move_insn (dest, src)
: emit_move_insn_1 (dest, src));
}
/* Emit a move from SRC to DEST, splitting compound moves into individual
instructions. SPLIT_TYPE is the type of split to perform. */
static void
mips_emit_move_or_split (rtx dest, rtx src, enum mips_split_type split_type)
{
if (mips_split_move_p (dest, src, split_type))
mips_split_move (dest, src, split_type, NULL);
else
mips_emit_move (dest, src);
}
/* Emit an instruction of the form (set TARGET (CODE OP0)). */
static void
mips_emit_unary (enum rtx_code code, rtx target, rtx op0)
{
emit_insn (gen_rtx_SET (target, gen_rtx_fmt_e (code, GET_MODE (op0), op0)));
}
/* Compute (CODE OP0) and store the result in a new register of mode MODE.
Return that new register. */
static rtx
mips_force_unary (machine_mode mode, enum rtx_code code, rtx op0)
{
rtx reg;
reg = gen_reg_rtx (mode);
mips_emit_unary (code, reg, op0);
return reg;
}
/* Emit an instruction of the form (set TARGET (CODE OP0 OP1)). */
void
mips_emit_binary (enum rtx_code code, rtx target, rtx op0, rtx op1)
{
emit_insn (gen_rtx_SET (target, gen_rtx_fmt_ee (code, GET_MODE (target),
op0, op1)));
}
/* Compute (CODE OP0 OP1) and store the result in a new register
of mode MODE. Return that new register. */
static rtx
mips_force_binary (machine_mode mode, enum rtx_code code, rtx op0, rtx op1)
{
rtx reg;
reg = gen_reg_rtx (mode);
mips_emit_binary (code, reg, op0, op1);
return reg;
}
/* Copy VALUE to a register and return that register. If new pseudos
are allowed, copy it into a new register, otherwise use DEST. */
static rtx
mips_force_temporary (rtx dest, rtx value)
{
if (can_create_pseudo_p ())
return force_reg (Pmode, value);
else
{
mips_emit_move (dest, value);
return dest;
}
}
/* Emit a call sequence with call pattern PATTERN and return the call
instruction itself (which is not necessarily the last instruction
emitted). ORIG_ADDR is the original, unlegitimized address,
ADDR is the legitimized form, and LAZY_P is true if the call
address is lazily-bound. */
static rtx_insn *
mips_emit_call_insn (rtx pattern, rtx orig_addr, rtx addr, bool lazy_p)
{
rtx_insn *insn;
rtx reg;
insn = emit_call_insn (pattern);
if (TARGET_MIPS16 && mips_use_pic_fn_addr_reg_p (orig_addr))
{
/* MIPS16 JALRs only take MIPS16 registers. If the target
function requires $25 to be valid on entry, we must copy it
there separately. The move instruction can be put in the
call's delay slot. */
reg = gen_rtx_REG (Pmode, PIC_FUNCTION_ADDR_REGNUM);
emit_insn_before (gen_move_insn (reg, addr), insn);
use_reg (&CALL_INSN_FUNCTION_USAGE (insn), reg);
}
if (lazy_p)
/* Lazy-binding stubs require $gp to be valid on entry. */
use_reg (&CALL_INSN_FUNCTION_USAGE (insn), pic_offset_table_rtx);
if (TARGET_USE_GOT)
{
/* See the comment above load_call<mode> for details. */
use_reg (&CALL_INSN_FUNCTION_USAGE (insn),
gen_rtx_REG (Pmode, GOT_VERSION_REGNUM));
emit_insn (gen_update_got_version ());
}
if (TARGET_MIPS16
&& TARGET_EXPLICIT_RELOCS
&& TARGET_CALL_CLOBBERED_GP)
{
rtx post_call_tmp_reg = gen_rtx_REG (word_mode, POST_CALL_TMP_REG);
clobber_reg (&CALL_INSN_FUNCTION_USAGE (insn), post_call_tmp_reg);
}
return insn;
}
/* Wrap symbol or label BASE in an UNSPEC address of type SYMBOL_TYPE,
then add CONST_INT OFFSET to the result. */
static rtx
mips_unspec_address_offset (rtx base, rtx offset,
enum mips_symbol_type symbol_type)
{
base = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, base),
UNSPEC_ADDRESS_FIRST + symbol_type);
if (offset != const0_rtx)
base = gen_rtx_PLUS (Pmode, base, offset);
return gen_rtx_CONST (Pmode, base);
}
/* Return an UNSPEC address with underlying address ADDRESS and symbol
type SYMBOL_TYPE. */
rtx
mips_unspec_address (rtx address, enum mips_symbol_type symbol_type)
{
rtx base, offset;
split_const (address, &base, &offset);
return mips_unspec_address_offset (base, offset, symbol_type);
}
/* If OP is an UNSPEC address, return the address to which it refers,
otherwise return OP itself. */
rtx
mips_strip_unspec_address (rtx op)
{
rtx base, offset;
split_const (op, &base, &offset);
if (UNSPEC_ADDRESS_P (base))
op = plus_constant (Pmode, UNSPEC_ADDRESS (base), INTVAL (offset));
return op;
}
/* If mips_unspec_address (ADDR, SYMBOL_TYPE) is a 32-bit value, add the
high part to BASE and return the result. Just return BASE otherwise.
TEMP is as for mips_force_temporary.
The returned expression can be used as the first operand to a LO_SUM. */
static rtx
mips_unspec_offset_high (rtx temp, rtx base, rtx addr,
enum mips_symbol_type symbol_type)
{
if (mips_split_p[symbol_type])
{
addr = gen_rtx_HIGH (Pmode, mips_unspec_address (addr, symbol_type));
addr = mips_force_temporary (temp, addr);
base = mips_force_temporary (temp, gen_rtx_PLUS (Pmode, addr, base));
}
return base;
}
/* Return an instruction that copies $gp into register REG. We want
GCC to treat the register's value as constant, so that its value
can be rematerialized on demand. */
static rtx
gen_load_const_gp (rtx reg)
{
return PMODE_INSN (gen_load_const_gp, (reg));
}
/* Return a pseudo register that contains the value of $gp throughout
the current function. Such registers are needed by MIPS16 functions,
for which $gp itself is not a valid base register or addition operand. */
static rtx
mips16_gp_pseudo_reg (void)
{
if (cfun->machine->mips16_gp_pseudo_rtx == NULL_RTX)
{
rtx_insn *scan;
cfun->machine->mips16_gp_pseudo_rtx = gen_reg_rtx (Pmode);
push_topmost_sequence ();
scan = get_insns ();
while (NEXT_INSN (scan) && !INSN_P (NEXT_INSN (scan)))
scan = NEXT_INSN (scan);
rtx set = gen_load_const_gp (cfun->machine->mips16_gp_pseudo_rtx);
rtx_insn *insn = emit_insn_after (set, scan);
INSN_LOCATION (insn) = 0;
pop_topmost_sequence ();
}
return cfun->machine->mips16_gp_pseudo_rtx;
}
/* Return a base register that holds pic_offset_table_rtx.
TEMP, if nonnull, is a scratch Pmode base register. */
rtx
mips_pic_base_register (rtx temp)
{
if (!TARGET_MIPS16)
return pic_offset_table_rtx;
if (currently_expanding_to_rtl)
return mips16_gp_pseudo_reg ();
if (can_create_pseudo_p ())
temp = gen_reg_rtx (Pmode);
if (TARGET_USE_GOT)
/* The first post-reload split exposes all references to $gp
(both uses and definitions). All references must remain
explicit after that point.
It is safe to introduce uses of $gp at any time, so for
simplicity, we do that before the split too. */
mips_emit_move (temp, pic_offset_table_rtx);
else
emit_insn (gen_load_const_gp (temp));
return temp;
}
/* Return the RHS of a load_call<mode> insn. */
static rtx
mips_unspec_call (rtx reg, rtx symbol)
{
rtvec vec;
vec = gen_rtvec (3, reg, symbol, gen_rtx_REG (SImode, GOT_VERSION_REGNUM));
return gen_rtx_UNSPEC (Pmode, vec, UNSPEC_LOAD_CALL);
}
/* If SRC is the RHS of a load_call<mode> insn, return the underlying symbol
reference. Return NULL_RTX otherwise. */
static rtx
mips_strip_unspec_call (rtx src)
{
if (GET_CODE (src) == UNSPEC && XINT (src, 1) == UNSPEC_LOAD_CALL)
return mips_strip_unspec_address (XVECEXP (src, 0, 1));
return NULL_RTX;
}
/* Create and return a GOT reference of type TYPE for address ADDR.
TEMP, if nonnull, is a scratch Pmode base register. */
rtx
mips_got_load (rtx temp, rtx addr, enum mips_symbol_type type)
{
rtx base, high, lo_sum_symbol;
base = mips_pic_base_register (temp);
/* If we used the temporary register to load $gp, we can't use
it for the high part as well. */
if (temp != NULL && reg_overlap_mentioned_p (base, temp))
temp = NULL;
high = mips_unspec_offset_high (temp, base, addr, type);
lo_sum_symbol = mips_unspec_address (addr, type);
if (type == SYMBOL_GOTOFF_CALL)
return mips_unspec_call (high, lo_sum_symbol);
else
return PMODE_INSN (gen_unspec_got, (high, lo_sum_symbol));
}
/* If MODE is MAX_MACHINE_MODE, ADDR appears as a move operand, otherwise
it appears in a MEM of that mode. Return true if ADDR is a legitimate
constant in that context and can be split into high and low parts.
If so, and if LOW_OUT is nonnull, emit the high part and store the
low part in *LOW_OUT. Leave *LOW_OUT unchanged otherwise.
TEMP is as for mips_force_temporary and is used to load the high
part into a register.
When MODE is MAX_MACHINE_MODE, the low part is guaranteed to be
a legitimize SET_SRC for an .md pattern, otherwise the low part
is guaranteed to be a legitimate address for mode MODE. */
bool
mips_split_symbol (rtx temp, rtx addr, machine_mode mode, rtx *low_out)
{
enum mips_symbol_context context;
enum mips_symbol_type symbol_type;
rtx high;
context = (mode == MAX_MACHINE_MODE
? SYMBOL_CONTEXT_LEA
: SYMBOL_CONTEXT_MEM);
if (GET_CODE (addr) == HIGH && context == SYMBOL_CONTEXT_LEA)
{
addr = XEXP (addr, 0);
if (mips_symbolic_constant_p (addr, context, &symbol_type)
&& mips_symbol_insns (symbol_type, mode) > 0
&& mips_split_hi_p[symbol_type])
{
if (low_out)
switch (symbol_type)
{
case SYMBOL_GOT_PAGE_OFST:
/* The high part of a page/ofst pair is loaded from the GOT. */
*low_out = mips_got_load (temp, addr, SYMBOL_GOTOFF_PAGE);
break;
default:
gcc_unreachable ();
}
return true;
}
}
else
{
if (mips_symbolic_constant_p (addr, context, &symbol_type)
&& mips_symbol_insns (symbol_type, mode) > 0
&& mips_split_p[symbol_type])
{
if (low_out)
switch (symbol_type)
{
case SYMBOL_GOT_DISP:
/* SYMBOL_GOT_DISP symbols are loaded from the GOT. */
*low_out = mips_got_load (temp, addr, SYMBOL_GOTOFF_DISP);
break;
case SYMBOL_GP_RELATIVE:
high = mips_pic_base_register (temp);
*low_out = gen_rtx_LO_SUM (Pmode, high, addr);
break;
default:
high = gen_rtx_HIGH (Pmode, copy_rtx (addr));
high = mips_force_temporary (temp, high);
*low_out = gen_rtx_LO_SUM (Pmode, high, addr);
break;
}
return true;
}
}
return false;
}
/* Return a legitimate address for REG + OFFSET. TEMP is as for
mips_force_temporary; it is only needed when OFFSET is not a
SMALL_OPERAND. */
static rtx
mips_add_offset (rtx temp, rtx reg, HOST_WIDE_INT offset)
{
if (!SMALL_OPERAND (offset))
{
rtx high;
if (TARGET_MIPS16)
{
/* Load the full offset into a register so that we can use
an unextended instruction for the address itself. */
high = GEN_INT (offset);
offset = 0;
}
else
{
/* Leave OFFSET as a 16-bit offset and put the excess in HIGH.
The addition inside the macro CONST_HIGH_PART may cause an
overflow, so we need to force a sign-extension check. */
high = gen_int_mode (CONST_HIGH_PART (offset), Pmode);
offset = CONST_LOW_PART (offset);
}
high = mips_force_temporary (temp, high);
reg = mips_force_temporary (temp, gen_rtx_PLUS (Pmode, high, reg));
}
return plus_constant (Pmode, reg, offset);
}
/* The __tls_get_attr symbol. */
static GTY(()) rtx mips_tls_symbol;
/* Return an instruction sequence that calls __tls_get_addr. SYM is
the TLS symbol we are referencing and TYPE is the symbol type to use
(either global dynamic or local dynamic). V0 is an RTX for the
return value location. */
static rtx_insn *
mips_call_tls_get_addr (rtx sym, enum mips_symbol_type type, rtx v0)
{
rtx loc, a0;
rtx_insn *insn;
a0 = gen_rtx_REG (Pmode, GP_ARG_FIRST);
if (!mips_tls_symbol)
mips_tls_symbol = init_one_libfunc ("__tls_get_addr");
loc = mips_unspec_address (sym, type);
start_sequence ();
emit_insn (gen_rtx_SET (a0, gen_rtx_LO_SUM (Pmode, pic_offset_table_rtx,
loc)));
insn = mips_expand_call (MIPS_CALL_NORMAL, v0, mips_tls_symbol,
const0_rtx, NULL_RTX, false);
RTL_CONST_CALL_P (insn) = 1;
use_reg (&CALL_INSN_FUNCTION_USAGE (insn), a0);
insn = get_insns ();
end_sequence ();
return insn;
}
/* Return a pseudo register that contains the current thread pointer. */
rtx
mips_expand_thread_pointer (rtx tp)
{
rtx fn;
if (TARGET_MIPS16)
{
if (!mips16_rdhwr_stub)
mips16_rdhwr_stub = new mips16_rdhwr_one_only_stub ();
fn = mips16_stub_call_address (mips16_rdhwr_stub);
emit_insn (PMODE_INSN (gen_tls_get_tp_mips16, (tp, fn)));
}
else
emit_insn (PMODE_INSN (gen_tls_get_tp, (tp)));
return tp;
}
static rtx
mips_get_tp (void)
{
return mips_expand_thread_pointer (gen_reg_rtx (Pmode));
}
/* Generate the code to access LOC, a thread-local SYMBOL_REF, and return
its address. The return value will be both a valid address and a valid
SET_SRC (either a REG or a LO_SUM). */
static rtx
mips_legitimize_tls_address (rtx loc)
{
rtx dest, v0, tp, tmp1, tmp2, eqv, offset;
enum tls_model model;
model = SYMBOL_REF_TLS_MODEL (loc);
/* Only TARGET_ABICALLS code can have more than one module; other
code must be static and should not use a GOT. All TLS models
reduce to local exec in this situation. */
if (!TARGET_ABICALLS)
model = TLS_MODEL_LOCAL_EXEC;
switch (model)
{
case TLS_MODEL_GLOBAL_DYNAMIC:
{
v0 = gen_rtx_REG (Pmode, GP_RETURN);
rtx_insn *insn = mips_call_tls_get_addr (loc, SYMBOL_TLSGD, v0);
dest = gen_reg_rtx (Pmode);
emit_libcall_block (insn, dest, v0, loc);
break;
}
case TLS_MODEL_LOCAL_DYNAMIC:
{
v0 = gen_rtx_REG (Pmode, GP_RETURN);
rtx_insn *insn = mips_call_tls_get_addr (loc, SYMBOL_TLSLDM, v0);
tmp1 = gen_reg_rtx (Pmode);
/* Attach a unique REG_EQUIV, to allow the RTL optimizers to
share the LDM result with other LD model accesses. */
eqv = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, const0_rtx),
UNSPEC_TLS_LDM);
emit_libcall_block (insn, tmp1, v0, eqv);
offset = mips_unspec_address (loc, SYMBOL_DTPREL);
if (mips_split_p[SYMBOL_DTPREL])
{
tmp2 = mips_unspec_offset_high (NULL, tmp1, loc, SYMBOL_DTPREL);
dest = gen_rtx_LO_SUM (Pmode, tmp2, offset);
}
else
dest = expand_binop (Pmode, add_optab, tmp1, offset,
0, 0, OPTAB_DIRECT);
break;
}
case TLS_MODEL_INITIAL_EXEC:
tp = mips_get_tp ();
tmp1 = gen_reg_rtx (Pmode);
tmp2 = mips_unspec_address (loc, SYMBOL_GOTTPREL);
if (Pmode == DImode)
emit_insn (gen_load_gotdi (tmp1, pic_offset_table_rtx, tmp2));
else
emit_insn (gen_load_gotsi (tmp1, pic_offset_table_rtx, tmp2));
dest = gen_reg_rtx (Pmode);
emit_insn (gen_add3_insn (dest, tmp1, tp));
break;
case TLS_MODEL_LOCAL_EXEC:
tmp1 = mips_get_tp ();
offset = mips_unspec_address (loc, SYMBOL_TPREL);
if (mips_split_p[SYMBOL_TPREL])
{
tmp2 = mips_unspec_offset_high (NULL, tmp1, loc, SYMBOL_TPREL);
dest = gen_rtx_LO_SUM (Pmode, tmp2, offset);
}
else
dest = expand_binop (Pmode, add_optab, tmp1, offset,
0, 0, OPTAB_DIRECT);
break;
default:
gcc_unreachable ();
}
return dest;
}
/* Implement "TARGET = __builtin_mips_get_fcsr ()" for MIPS16,
using a stub. */
void
mips16_expand_get_fcsr (rtx target)
{
if (!mips16_get_fcsr_stub)
mips16_get_fcsr_stub = new mips16_get_fcsr_one_only_stub ();
rtx fn = mips16_stub_call_address (mips16_get_fcsr_stub);
emit_insn (PMODE_INSN (gen_mips_get_fcsr_mips16, (fn)));
emit_move_insn (target, gen_rtx_REG (SImode, GET_FCSR_REGNUM));
}
/* Implement __builtin_mips_set_fcsr (TARGET) for MIPS16, using a stub. */
void
mips16_expand_set_fcsr (rtx newval)
{
if (!mips16_set_fcsr_stub)
mips16_set_fcsr_stub = new mips16_set_fcsr_one_only_stub ();
rtx fn = mips16_stub_call_address (mips16_set_fcsr_stub);
emit_move_insn (gen_rtx_REG (SImode, SET_FCSR_REGNUM), newval);
emit_insn (PMODE_INSN (gen_mips_set_fcsr_mips16, (fn)));
}
/* If X is not a valid address for mode MODE, force it into a register. */
static rtx
mips_force_address (rtx x, machine_mode mode)
{
if (!mips_legitimate_address_p (mode, x, false))
x = force_reg (Pmode, x);
return x;
}
/* This function is used to implement LEGITIMIZE_ADDRESS. If X can
be legitimized in a way that the generic machinery might not expect,
return a new address, otherwise return NULL. MODE is the mode of
the memory being accessed. */
static rtx
mips_legitimize_address (rtx x, rtx oldx ATTRIBUTE_UNUSED,
machine_mode mode)
{
rtx base, addr;
HOST_WIDE_INT offset;
if (mips_tls_symbol_p (x))
return mips_legitimize_tls_address (x);
/* See if the address can split into a high part and a LO_SUM. */
if (mips_split_symbol (NULL, x, mode, &addr))
return mips_force_address (addr, mode);
/* Handle BASE + OFFSET using mips_add_offset. */
mips_split_plus (x, &base, &offset);
if (offset != 0)
{
if (!mips_valid_base_register_p (base, mode, false))
base = copy_to_mode_reg (Pmode, base);
addr = mips_add_offset (NULL, base, offset);
return mips_force_address (addr, mode);
}
return x;
}
/* Load VALUE into DEST. TEMP is as for mips_force_temporary. */
void
mips_move_integer (rtx temp, rtx dest, unsigned HOST_WIDE_INT value)
{
struct mips_integer_op codes[MIPS_MAX_INTEGER_OPS];
machine_mode mode;
unsigned int i, num_ops;
rtx x;
mode = GET_MODE (dest);
num_ops = mips_build_integer (codes, value);
/* Apply each binary operation to X. Invariant: X is a legitimate
source operand for a SET pattern. */
x = GEN_INT (codes[0].value);
for (i = 1; i < num_ops; i++)
{
if (!can_create_pseudo_p ())
{
emit_insn (gen_rtx_SET (temp, x));
x = temp;
}
else
x = force_reg (mode, x);
x = gen_rtx_fmt_ee (codes[i].code, mode, x, GEN_INT (codes[i].value));
}
emit_insn (gen_rtx_SET (dest, x));
}
/* Subroutine of mips_legitimize_move. Move constant SRC into register
DEST given that SRC satisfies immediate_operand but doesn't satisfy
move_operand. */
static void
mips_legitimize_const_move (machine_mode mode, rtx dest, rtx src)
{
rtx base, offset;
/* Split moves of big integers into smaller pieces. */
if (splittable_const_int_operand (src, mode))
{
mips_move_integer (dest, dest, INTVAL (src));
return;
}
/* Split moves of symbolic constants into high/low pairs. */
if (mips_split_symbol (dest, src, MAX_MACHINE_MODE, &src))
{
emit_insn (gen_rtx_SET (dest, src));
return;
}
/* Generate the appropriate access sequences for TLS symbols. */
if (mips_tls_symbol_p (src))
{
mips_emit_move (dest, mips_legitimize_tls_address (src));
return;
}
/* If we have (const (plus symbol offset)), and that expression cannot
be forced into memory, load the symbol first and add in the offset.
In non-MIPS16 mode, prefer to do this even if the constant _can_ be
forced into memory, as it usually produces better code. */
split_const (src, &base, &offset);
if (offset != const0_rtx
&& (targetm.cannot_force_const_mem (mode, src)
|| (!TARGET_MIPS16 && can_create_pseudo_p ())))
{
base = mips_force_temporary (dest, base);
mips_emit_move (dest, mips_add_offset (NULL, base, INTVAL (offset)));
return;
}
src = force_const_mem (mode, src);
/* When using explicit relocs, constant pool references are sometimes
not legitimate addresses. */
mips_split_symbol (dest, XEXP (src, 0), mode, &XEXP (src, 0));
mips_emit_move (dest, src);
}
/* If (set DEST SRC) is not a valid move instruction, emit an equivalent
sequence that is valid. */
bool
mips_legitimize_move (machine_mode mode, rtx dest, rtx src)
{
/* Both src and dest are non-registers; one special case is supported where
the source is (const_int 0) and the store can source the zero register.
MIPS16 and MSA are never able to source the zero register directly in
memory operations. */
if (!register_operand (dest, mode)
&& !register_operand (src, mode)
&& (TARGET_MIPS16 || !const_0_operand (src, mode)
|| MSA_SUPPORTED_MODE_P (mode)))
{
mips_emit_move (dest, force_reg (mode, src));
return true;
}
/* We need to deal with constants that would be legitimate
immediate_operands but aren't legitimate move_operands. */
if (CONSTANT_P (src) && !move_operand (src, mode))
{
mips_legitimize_const_move (mode, dest, src);
set_unique_reg_note (get_last_insn (), REG_EQUAL, copy_rtx (src));
return true;
}
return false;
}
/* Return true if value X in context CONTEXT is a small-data address
that can be rewritten as a LO_SUM. */
static bool
mips_rewrite_small_data_p (rtx x, enum mips_symbol_context context)
{
enum mips_symbol_type symbol_type;
return (mips_lo_relocs[SYMBOL_GP_RELATIVE]
&& !mips_split_p[SYMBOL_GP_RELATIVE]
&& mips_symbolic_constant_p (x, context, &symbol_type)
&& symbol_type == SYMBOL_GP_RELATIVE);
}
/* Return true if OP refers to small data symbols directly, not through
a LO_SUM. CONTEXT is the context in which X appears. */
static int
mips_small_data_pattern_1 (rtx x, enum mips_symbol_context context)
{
subrtx_var_iterator::array_type array;
FOR_EACH_SUBRTX_VAR (iter, array, x, ALL)
{
rtx x = *iter;
/* Ignore things like "g" constraints in asms. We make no particular
guarantee about which symbolic constants are acceptable as asm operands
versus which must be forced into a GPR. */
if (GET_CODE (x) == LO_SUM || GET_CODE (x) == ASM_OPERANDS)
iter.skip_subrtxes ();
else if (MEM_P (x))
{
if (mips_small_data_pattern_1 (XEXP (x, 0), SYMBOL_CONTEXT_MEM))
return true;
iter.skip_subrtxes ();
}
else if (mips_rewrite_small_data_p (x, context))
return true;
}
return false;
}
/* Return true if OP refers to small data symbols directly, not through
a LO_SUM. */
bool
mips_small_data_pattern_p (rtx op)
{
return mips_small_data_pattern_1 (op, SYMBOL_CONTEXT_LEA);
}
/* Rewrite *LOC so that it refers to small data using explicit
relocations. CONTEXT is the context in which *LOC appears. */
static void
mips_rewrite_small_data_1 (rtx *loc, enum mips_symbol_context context)
{
subrtx_ptr_iterator::array_type array;
FOR_EACH_SUBRTX_PTR (iter, array, loc, ALL)
{
rtx *loc = *iter;
if (MEM_P (*loc))
{
mips_rewrite_small_data_1 (&XEXP (*loc, 0), SYMBOL_CONTEXT_MEM);
iter.skip_subrtxes ();
}
else if (mips_rewrite_small_data_p (*loc, context))
{
*loc = gen_rtx_LO_SUM (Pmode, pic_offset_table_rtx, *loc);
iter.skip_subrtxes ();
}
else if (GET_CODE (*loc) == LO_SUM)
iter.skip_subrtxes ();
}
}
/* Rewrite instruction pattern PATTERN so that it refers to small data
using explicit relocations. */
rtx
mips_rewrite_small_data (rtx pattern)
{
pattern = copy_insn (pattern);
mips_rewrite_small_data_1 (&pattern, SYMBOL_CONTEXT_LEA);
return pattern;
}
/* The cost of loading values from the constant pool. It should be
larger than the cost of any constant we want to synthesize inline. */
#define CONSTANT_POOL_COST COSTS_N_INSNS (TARGET_MIPS16 ? 4 : 8)
/* Return the cost of X when used as an operand to the MIPS16 instruction
that implements CODE. Return -1 if there is no such instruction, or if
X is not a valid immediate operand for it. */
static int
mips16_constant_cost (int code, HOST_WIDE_INT x)
{
switch (code)
{
case ASHIFT:
case ASHIFTRT:
case LSHIFTRT:
/* Shifts by between 1 and 8 bits (inclusive) are unextended,
other shifts are extended. The shift patterns truncate the shift
count to the right size, so there are no out-of-range values. */
if (IN_RANGE (x, 1, 8))
return 0;
return COSTS_N_INSNS (1);
case PLUS:
if (IN_RANGE (x, -128, 127))
return 0;
if (SMALL_OPERAND (x))
return COSTS_N_INSNS (1);
return -1;
case LEU:
/* Like LE, but reject the always-true case. */
if (x == -1)
return -1;
/* FALLTHRU */
case LE:
/* We add 1 to the immediate and use SLT. */
x += 1;
/* FALLTHRU */
case XOR:
/* We can use CMPI for an xor with an unsigned 16-bit X. */
case LT:
case LTU:
if (IN_RANGE (x, 0, 255))
return 0;
if (SMALL_OPERAND_UNSIGNED (x))
return COSTS_N_INSNS (1);
return -1;
case EQ:
case NE:
/* Equality comparisons with 0 are cheap. */
if (x == 0)
return 0;
return -1;
default:
return -1;
}
}
/* Return true if there is a non-MIPS16 instruction that implements CODE
and if that instruction accepts X as an immediate operand. */
static int
mips_immediate_operand_p (int code, HOST_WIDE_INT x)
{
switch (code)
{
case ASHIFT:
case ASHIFTRT:
case LSHIFTRT:
/* All shift counts are truncated to a valid constant. */
return true;
case ROTATE:
case ROTATERT:
/* Likewise rotates, if the target supports rotates at all. */
return ISA_HAS_ROR;
case AND:
case IOR:
case XOR:
/* These instructions take 16-bit unsigned immediates. */
return SMALL_OPERAND_UNSIGNED (x);
case PLUS:
case LT:
case LTU:
/* These instructions take 16-bit signed immediates. */
return SMALL_OPERAND (x);
case EQ:
case NE:
case GT:
case GTU:
/* The "immediate" forms of these instructions are really
implemented as comparisons with register 0. */
return x == 0;
case GE:
case GEU:
/* Likewise, meaning that the only valid immediate operand is 1. */
return x == 1;
case LE:
/* We add 1 to the immediate and use SLT. */
return SMALL_OPERAND (x + 1);
case LEU:
/* Likewise SLTU, but reject the always-true case. */
return SMALL_OPERAND (x + 1) && x + 1 != 0;
case SIGN_EXTRACT:
case ZERO_EXTRACT:
/* The bit position and size are immediate operands. */
return ISA_HAS_EXT_INS;
default:
/* By default assume that $0 can be used for 0. */
return x == 0;
}
}
/* Return the cost of binary operation X, given that the instruction
sequence for a word-sized or smaller operation has cost SINGLE_COST
and that the sequence of a double-word operation has cost DOUBLE_COST.
If SPEED is true, optimize for speed otherwise optimize for size. */
static int
mips_binary_cost (rtx x, int single_cost, int double_cost, bool speed)
{
int cost;
if (GET_MODE_SIZE (GET_MODE (x)) == UNITS_PER_WORD * 2)
cost = double_cost;
else
cost = single_cost;
return (cost
+ set_src_cost (XEXP (x, 0), GET_MODE (x), speed)
+ rtx_cost (XEXP (x, 1), GET_MODE (x), GET_CODE (x), 1, speed));
}
/* Return the cost of floating-point multiplications of mode MODE. */
static int
mips_fp_mult_cost (machine_mode mode)
{
return mode == DFmode ? mips_cost->fp_mult_df : mips_cost->fp_mult_sf;
}
/* Return the cost of floating-point divisions of mode MODE. */
static int
mips_fp_div_cost (machine_mode mode)
{
return mode == DFmode ? mips_cost->fp_div_df : mips_cost->fp_div_sf;
}
/* Return the cost of sign-extending OP to mode MODE, not including the
cost of OP itself. */
static int
mips_sign_extend_cost (machine_mode mode, rtx op)
{
if (MEM_P (op))
/* Extended loads are as cheap as unextended ones. */
return 0;
if (TARGET_64BIT && mode == DImode && GET_MODE (op) == SImode)
/* A sign extension from SImode to DImode in 64-bit mode is free. */
return 0;
if (ISA_HAS_SEB_SEH || GENERATE_MIPS16E)
/* We can use SEB or SEH. */
return COSTS_N_INSNS (1);
/* We need to use a shift left and a shift right. */
return COSTS_N_INSNS (TARGET_MIPS16 ? 4 : 2);
}
/* Return the cost of zero-extending OP to mode MODE, not including the
cost of OP itself. */
static int
mips_zero_extend_cost (machine_mode mode, rtx op)
{
if (MEM_P (op))
/* Extended loads are as cheap as unextended ones. */
return 0;
if (TARGET_64BIT && mode == DImode && GET_MODE (op) == SImode)
/* We need a shift left by 32 bits and a shift right by 32 bits. */
return COSTS_N_INSNS (TARGET_MIPS16 ? 4 : 2);
if (GENERATE_MIPS16E)
/* We can use ZEB or ZEH. */
return COSTS_N_INSNS (1);
if (TARGET_MIPS16)
/* We need to load 0xff or 0xffff into a register and use AND. */
return COSTS_N_INSNS (GET_MODE (op) == QImode ? 2 : 3);
/* We can use ANDI. */
return COSTS_N_INSNS (1);
}
/* Return the cost of moving between two registers of mode MODE,
assuming that the move will be in pieces of at most UNITS bytes. */
static int
mips_set_reg_reg_piece_cost (machine_mode mode, unsigned int units)
{
return COSTS_N_INSNS ((GET_MODE_SIZE (mode) + units - 1) / units);
}
/* Return the cost of moving between two registers of mode MODE. */
static int
mips_set_reg_reg_cost (machine_mode mode)
{
switch (GET_MODE_CLASS (mode))
{
case MODE_CC:
return mips_set_reg_reg_piece_cost (mode, GET_MODE_SIZE (CCmode));
case MODE_FLOAT:
case MODE_COMPLEX_FLOAT:
case MODE_VECTOR_FLOAT:
if (TARGET_HARD_FLOAT)
return mips_set_reg_reg_piece_cost (mode, UNITS_PER_HWFPVALUE);
/* Fall through */
default:
return mips_set_reg_reg_piece_cost (mode, UNITS_PER_WORD);
}
}
/* Implement TARGET_RTX_COSTS. */
static bool
mips_rtx_costs (rtx x, machine_mode mode, int outer_code,
int opno ATTRIBUTE_UNUSED, int *total, bool speed)
{
int code = GET_CODE (x);
bool float_mode_p = FLOAT_MODE_P (mode);
int cost;
rtx addr;
/* The cost of a COMPARE is hard to define for MIPS. COMPAREs don't
appear in the instruction stream, and the cost of a comparison is
really the cost of the branch or scc condition. At the time of
writing, GCC only uses an explicit outer COMPARE code when optabs
is testing whether a constant is expensive enough to force into a
register. We want optabs to pass such constants through the MIPS
expanders instead, so make all constants very cheap here. */
if (outer_code == COMPARE)
{
gcc_assert (CONSTANT_P (x));
*total = 0;
return true;
}
switch (code)
{
case CONST_INT:
/* Treat *clear_upper32-style ANDs as having zero cost in the
second operand. The cost is entirely in the first operand.
??? This is needed because we would otherwise try to CSE
the constant operand. Although that's the right thing for
instructions that continue to be a register operation throughout
compilation, it is disastrous for instructions that could
later be converted into a memory operation. */
if (TARGET_64BIT
&& outer_code == AND
&& UINTVAL (x) == 0xffffffff)
{
*total = 0;
return true;
}
if (TARGET_MIPS16)
{
cost = mips16_constant_cost (outer_code, INTVAL (x));
if (cost >= 0)
{
*total = cost;
return true;
}
}
else
{
/* When not optimizing for size, we care more about the cost
of hot code, and hot code is often in a loop. If a constant
operand needs to be forced into a register, we will often be
able to hoist the constant load out of the loop, so the load
should not contribute to the cost. */
if (speed || mips_immediate_operand_p (outer_code, INTVAL (x)))
{
*total = 0;
return true;
}
}
/* Fall through. */
case CONST:
case SYMBOL_REF:
case LABEL_REF:
case CONST_DOUBLE:
if (force_to_mem_operand (x, VOIDmode))
{
*total = COSTS_N_INSNS (1);
return true;
}
cost = mips_const_insns (x);
if (cost > 0)
{
/* If the constant is likely to be stored in a GPR, SETs of
single-insn constants are as cheap as register sets; we
never want to CSE them.
Don't reduce the cost of storing a floating-point zero in
FPRs. If we have a zero in an FPR for other reasons, we
can get better cfg-cleanup and delayed-branch results by
using it consistently, rather than using $0 sometimes and
an FPR at other times. Also, moves between floating-point
registers are sometimes cheaper than (D)MTC1 $0. */
if (cost == 1
&& outer_code == SET
&& !(float_mode_p && TARGET_HARD_FLOAT))
cost = 0;
/* When non-MIPS16 code loads a constant N>1 times, we rarely
want to CSE the constant itself. It is usually better to
have N copies of the last operation in the sequence and one
shared copy of the other operations. (Note that this is
not true for MIPS16 code, where the final operation in the
sequence is often an extended instruction.)
Also, if we have a CONST_INT, we don't know whether it is
for a word or doubleword operation, so we cannot rely on
the result of mips_build_integer. */
else if (!TARGET_MIPS16
&& (outer_code == SET || GET_MODE (x) == VOIDmode))
cost = 1;
*total = COSTS_N_INSNS (cost);
return true;
}
/* The value will need to be fetched from the constant pool. */
*total = CONSTANT_POOL_COST;
return true;
case MEM:
/* If the address is legitimate, return the number of
instructions it needs. */
addr = XEXP (x, 0);
cost = mips_address_insns (addr, mode, true);
if (cost > 0)
{
*total = COSTS_N_INSNS (cost + 1);
return true;
}
/* Check for a scaled indexed address. */
if (mips_lwxs_address_p (addr)
|| mips_lx_address_p (addr, mode))
{
*total = COSTS_N_INSNS (2);
return true;
}
/* Otherwise use the default handling. */
return false;
case FFS:
*total = COSTS_N_INSNS (6);
return false;
case NOT:
*total = COSTS_N_INSNS (GET_MODE_SIZE (mode) > UNITS_PER_WORD ? 2 : 1);
return false;
case AND:
/* Check for a *clear_upper32 pattern and treat it like a zero
extension. See the pattern's comment for details. */
if (TARGET_64BIT
&& mode == DImode
&& CONST_INT_P (XEXP (x, 1))
&& UINTVAL (XEXP (x, 1)) == 0xffffffff)
{
*total = (mips_zero_extend_cost (mode, XEXP (x, 0))
+ set_src_cost (XEXP (x, 0), mode, speed));
return true;
}
if (ISA_HAS_CINS && CONST_INT_P (XEXP (x, 1)))
{
rtx op = XEXP (x, 0);
if (GET_CODE (op) == ASHIFT
&& CONST_INT_P (XEXP (op, 1))
&& mask_low_and_shift_p (mode, XEXP (x, 1), XEXP (op, 1), 32))
{
*total = COSTS_N_INSNS (1);
*total += set_src_cost (XEXP (op, 0), mode, speed);
return true;
}
}
/* (AND (NOT op0) (NOT op1) is a nor operation that can be done in
a single instruction. */
if (!TARGET_MIPS16
&& GET_CODE (XEXP (x, 0)) == NOT
&& GET_CODE (XEXP (x, 1)) == NOT)
{
cost = GET_MODE_SIZE (mode) > UNITS_PER_WORD ? 2 : 1;
*total = (COSTS_N_INSNS (cost)
+ set_src_cost (XEXP (XEXP (x, 0), 0), mode, speed)
+ set_src_cost (XEXP (XEXP (x, 1), 0), mode, speed));
return true;
}
/* Fall through. */
case IOR:
case XOR:
/* Double-word operations use two single-word operations. */
*total = mips_binary_cost (x, COSTS_N_INSNS (1), COSTS_N_INSNS (2),
speed);
return true;
case ASHIFT:
case ASHIFTRT:
case LSHIFTRT:
case ROTATE:
case ROTATERT:
if (CONSTANT_P (XEXP (x, 1)))
*total = mips_binary_cost (x, COSTS_N_INSNS (1), COSTS_N_INSNS (4),
speed);
else
*total = mips_binary_cost (x, COSTS_N_INSNS (1), COSTS_N_INSNS (12),
speed);
return true;
case ABS:
if (float_mode_p)
*total = mips_cost->fp_add;
else
*total = COSTS_N_INSNS (4);
return false;
case LO_SUM:
/* Low-part immediates need an extended MIPS16 instruction. */
*total = (COSTS_N_INSNS (TARGET_MIPS16 ? 2 : 1)
+ set_src_cost (XEXP (x, 0), mode, speed));
return true;
case LT:
case LTU:
case LE:
case LEU:
case GT:
case GTU:
case GE:
case GEU:
case EQ:
case NE:
case UNORDERED:
case LTGT:
case UNGE:
case UNGT:
case UNLE:
case UNLT:
/* Branch comparisons have VOIDmode, so use the first operand's
mode instead. */
mode = GET_MODE (XEXP (x, 0));
if (FLOAT_MODE_P (mode))
{
*total = mips_cost->fp_add;
return false;
}
*total = mips_binary_cost (x, COSTS_N_INSNS (1), COSTS_N_INSNS (4),
speed);
return true;
case MINUS:
if (float_mode_p && ISA_HAS_UNFUSED_MADD4 && !HONOR_SIGNED_ZEROS (mode))
{
/* See if we can use NMADD or NMSUB via the *nmadd4<mode>_fastmath
or *nmsub4<mode>_fastmath patterns. These patterns check for
HONOR_SIGNED_ZEROS so we check here too. */
rtx op0 = XEXP (x, 0);
rtx op1 = XEXP (x, 1);
if (GET_CODE (op0) == MULT && GET_CODE (XEXP (op0, 0)) == NEG)
{
*total = (mips_fp_mult_cost (mode)
+ set_src_cost (XEXP (XEXP (op0, 0), 0), mode, speed)
+ set_src_cost (XEXP (op0, 1), mode, speed)
+ set_src_cost (op1, mode, speed));
return true;
}
if (GET_CODE (op1) == MULT)
{
*total = (mips_fp_mult_cost (mode)
+ set_src_cost (op0, mode, speed)
+ set_src_cost (XEXP (op1, 0), mode, speed)
+ set_src_cost (XEXP (op1, 1), mode, speed));
return true;
}
}
/* Fall through. */
case PLUS:
if (float_mode_p)
{
/* If this is part of a MADD or MSUB, treat the PLUS as
being free. */
if (ISA_HAS_UNFUSED_MADD4 && GET_CODE (XEXP (x, 0)) == MULT)
*total = 0;
else
*total = mips_cost->fp_add;
return false;
}
/* If it's an add + mult (which is equivalent to shift left) and
it's immediate operand satisfies const_immlsa_operand predicate. */
if (((ISA_HAS_LSA && mode == SImode)
|| (ISA_HAS_DLSA && mode == DImode))
&& GET_CODE (XEXP (x, 0)) == MULT)
{
rtx op2 = XEXP (XEXP (x, 0), 1);
if (const_immlsa_operand (op2, mode))
{
*total = (COSTS_N_INSNS (1)
+ set_src_cost (XEXP (XEXP (x, 0), 0), mode, speed)
+ set_src_cost (XEXP (x, 1), mode, speed));
return true;
}
}
/* Double-word operations require three single-word operations and
an SLTU. The MIPS16 version then needs to move the result of
the SLTU from $24 to a MIPS16 register. */
*total = mips_binary_cost (x, COSTS_N_INSNS (1),
COSTS_N_INSNS (TARGET_MIPS16 ? 5 : 4),
speed);
return true;
case NEG:
if (float_mode_p && ISA_HAS_UNFUSED_MADD4)
{
/* See if we can use NMADD or NMSUB via the *nmadd4<mode> or
*nmsub4<mode> patterns. */
rtx op = XEXP (x, 0);
if ((GET_CODE (op) == PLUS || GET_CODE (op) == MINUS)
&& GET_CODE (XEXP (op, 0)) == MULT)
{
*total = (mips_fp_mult_cost (mode)
+ set_src_cost (XEXP (XEXP (op, 0), 0), mode, speed)
+ set_src_cost (XEXP (XEXP (op, 0), 1), mode, speed)
+ set_src_cost (XEXP (op, 1), mode, speed));
return true;
}
}
if (float_mode_p)
*total = mips_cost->fp_add;
else
*total = COSTS_N_INSNS (GET_MODE_SIZE (mode) > UNITS_PER_WORD ? 4 : 1);
return false;
case FMA:
*total = mips_fp_mult_cost (mode);
return false;
case MULT:
if (float_mode_p)
*total = mips_fp_mult_cost (mode);
else if (mode == DImode && !TARGET_64BIT)
/* Synthesized from 2 mulsi3s, 1 mulsidi3 and two additions,
where the mulsidi3 always includes an MFHI and an MFLO. */
*total = (speed
? mips_cost->int_mult_si * 3 + 6
: COSTS_N_INSNS (ISA_HAS_MUL3 ? 7 : 9));
else if (!speed)
*total = COSTS_N_INSNS ((ISA_HAS_MUL3 || ISA_HAS_R6MUL) ? 1 : 2) + 1;
else if (mode == DImode)
*total = mips_cost->int_mult_di;
else
*total = mips_cost->int_mult_si;
return false;
case DIV:
/* Check for a reciprocal. */
if (float_mode_p
&& ISA_HAS_FP_RECIP_RSQRT (mode)
&& flag_unsafe_math_optimizations
&& XEXP (x, 0) == CONST1_RTX (mode))
{
if (outer_code == SQRT || GET_CODE (XEXP (x, 1)) == SQRT)
/* An rsqrt<mode>a or rsqrt<mode>b pattern. Count the
division as being free. */
*total = set_src_cost (XEXP (x, 1), mode, speed);
else
*total = (mips_fp_div_cost (mode)
+ set_src_cost (XEXP (x, 1), mode, speed));
return true;
}
/* Fall through. */
case SQRT:
case MOD:
if (float_mode_p)
{
*total = mips_fp_div_cost (mode);
return false;
}
/* Fall through. */
case UDIV:
case UMOD:
if (!speed)
{
/* It is our responsibility to make division by a power of 2
as cheap as 2 register additions if we want the division
expanders to be used for such operations; see the setting
of sdiv_pow2_cheap in optabs.c. Using (D)DIV for MIPS16
should always produce shorter code than using
expand_sdiv2_pow2. */
if (TARGET_MIPS16
&& CONST_INT_P (XEXP (x, 1))
&& exact_log2 (INTVAL (XEXP (x, 1))) >= 0)
{
*total = COSTS_N_INSNS (2);
*total += set_src_cost (XEXP (x, 0), mode, speed);
return true;
}
*total = COSTS_N_INSNS (mips_idiv_insns (mode));
}
else if (mode == DImode)
*total = mips_cost->int_div_di;
else
*total = mips_cost->int_div_si;
return false;
case SIGN_EXTEND:
*total = mips_sign_extend_cost (mode, XEXP (x, 0));
return false;
case ZERO_EXTEND:
if (outer_code == SET
&& ISA_HAS_BADDU
&& (GET_CODE (XEXP (x, 0)) == TRUNCATE
|| GET_CODE (XEXP (x, 0)) == SUBREG)
&& GET_MODE (XEXP (x, 0)) == QImode
&& GET_CODE (XEXP (XEXP (x, 0), 0)) == PLUS)
{
*total = set_src_cost (XEXP (XEXP (x, 0), 0), VOIDmode, speed);
return true;
}
*total = mips_zero_extend_cost (mode, XEXP (x, 0));
return false;
case TRUNCATE:
/* Costings for highpart multiplies. Matching patterns of the form:
(lshiftrt:DI (mult:DI (sign_extend:DI (...)
(sign_extend:DI (...))
(const_int 32)
*/
if (ISA_HAS_R6MUL
&& (GET_CODE (XEXP (x, 0)) == ASHIFTRT
|| GET_CODE (XEXP (x, 0)) == LSHIFTRT)
&& CONST_INT_P (XEXP (XEXP (x, 0), 1))
&& ((INTVAL (XEXP (XEXP (x, 0), 1)) == 32
&& GET_MODE (XEXP (x, 0)) == DImode)
|| (ISA_HAS_R6DMUL
&& INTVAL (XEXP (XEXP (x, 0), 1)) == 64
&& GET_MODE (XEXP (x, 0)) == TImode))
&& GET_CODE (XEXP (XEXP (x, 0), 0)) == MULT
&& ((GET_CODE (XEXP (XEXP (XEXP (x, 0), 0), 0)) == SIGN_EXTEND
&& GET_CODE (XEXP (XEXP (XEXP (x, 0), 0), 1)) == SIGN_EXTEND)
|| (GET_CODE (XEXP (XEXP (XEXP (x, 0), 0), 0)) == ZERO_EXTEND
&& (GET_CODE (XEXP (XEXP (XEXP (x, 0), 0), 1))
== ZERO_EXTEND))))
{
if (!speed)
*total = COSTS_N_INSNS (1) + 1;
else if (mode == DImode)
*total = mips_cost->int_mult_di;
else
*total = mips_cost->int_mult_si;
/* Sign extension is free, zero extension costs for DImode when
on a 64bit core / when DMUL is present. */
for (int i = 0; i < 2; ++i)
{
rtx op = XEXP (XEXP (XEXP (x, 0), 0), i);
if (ISA_HAS_R6DMUL
&& GET_CODE (op) == ZERO_EXTEND
&& GET_MODE (op) == DImode)
*total += rtx_cost (op, DImode, MULT, i, speed);
else
*total += rtx_cost (XEXP (op, 0), VOIDmode, GET_CODE (op),
0, speed);
}
return true;
}
return false;
case FLOAT:
case UNSIGNED_FLOAT:
case FIX:
case FLOAT_EXTEND:
case FLOAT_TRUNCATE:
*total = mips_cost->fp_add;
return false;
case SET:
if (register_operand (SET_DEST (x), VOIDmode)
&& reg_or_0_operand (SET_SRC (x), VOIDmode))
{
*total = mips_set_reg_reg_cost (GET_MODE (SET_DEST (x)));
return true;
}
return false;
default:
return false;
}
}
/* Implement TARGET_ADDRESS_COST. */
static int
mips_address_cost (rtx addr, machine_mode mode,
addr_space_t as ATTRIBUTE_UNUSED,
bool speed ATTRIBUTE_UNUSED)
{
return mips_address_insns (addr, mode, false);
}
/* Implement TARGET_NO_SPECULATION_IN_DELAY_SLOTS_P. */
static bool
mips_no_speculation_in_delay_slots_p ()
{
return TARGET_CB_MAYBE;
}
/* Information about a single instruction in a multi-instruction
asm sequence. */
struct mips_multi_member {
/* True if this is a label, false if it is code. */
bool is_label_p;
/* The output_asm_insn format of the instruction. */
const char *format;
/* The operands to the instruction. */
rtx operands[MAX_RECOG_OPERANDS];
};
typedef struct mips_multi_member mips_multi_member;
/* The instructions that make up the current multi-insn sequence. */
static vec<mips_multi_member> mips_multi_members;
/* How many instructions (as opposed to labels) are in the current
multi-insn sequence. */
static unsigned int mips_multi_num_insns;
/* Start a new multi-insn sequence. */
static void
mips_multi_start (void)
{
mips_multi_members.truncate (0);
mips_multi_num_insns = 0;
}
/* Add a new, zero initialized member to the current multi-insn sequence. */
static struct mips_multi_member *
mips_multi_add (void)
{
mips_multi_member empty;
memset (&empty, 0, sizeof (empty));
return mips_multi_members.safe_push (empty);
}
/* Add a normal insn with the given asm format to the current multi-insn
sequence. The other arguments are a null-terminated list of operands. */
static void
mips_multi_add_insn (const char *format, ...)
{
struct mips_multi_member *member;
va_list ap;
unsigned int i;
rtx op;
member = mips_multi_add ();
member->is_label_p = false;
member->format = format;
va_start (ap, format);
i = 0;
while ((op = va_arg (ap, rtx)))
member->operands[i++] = op;
va_end (ap);
mips_multi_num_insns++;
}
/* Add the given label definition to the current multi-insn sequence.
The definition should include the colon. */
static void
mips_multi_add_label (const char *label)
{
struct mips_multi_member *member;
member = mips_multi_add ();
member->is_label_p = true;
member->format = label;
}
/* Return the index of the last member of the current multi-insn sequence. */
static unsigned int
mips_multi_last_index (void)
{
return mips_multi_members.length () - 1;
}
/* Add a copy of an existing instruction to the current multi-insn
sequence. I is the index of the instruction that should be copied. */
static void
mips_multi_copy_insn (unsigned int i)
{
struct mips_multi_member *member;
member = mips_multi_add ();
memcpy (member, &mips_multi_members[i], sizeof (*member));
gcc_assert (!member->is_label_p);
}
/* Change the operand of an existing instruction in the current
multi-insn sequence. I is the index of the instruction,
OP is the index of the operand, and X is the new value. */
static void
mips_multi_set_operand (unsigned int i, unsigned int op, rtx x)
{
mips_multi_members[i].operands[op] = x;
}
/* Write out the asm code for the current multi-insn sequence. */
static void
mips_multi_write (void)
{
struct mips_multi_member *member;
unsigned int i;
FOR_EACH_VEC_ELT (mips_multi_members, i, member)
if (member->is_label_p)
fprintf (asm_out_file, "%s\n", member->format);
else
output_asm_insn (member->format, member->operands);
}
/* Return one word of double-word value OP, taking into account the fixed
endianness of certain registers. HIGH_P is true to select the high part,
false to select the low part. */
rtx
mips_subword (rtx op, bool high_p)
{
unsigned int byte, offset;
machine_mode mode;
mode = GET_MODE (op);
if (mode == VOIDmode)
mode = TARGET_64BIT ? TImode : DImode;
if (TARGET_BIG_ENDIAN ? !high_p : high_p)
byte = UNITS_PER_WORD;
else
byte = 0;
if (FP_REG_RTX_P (op))
{
/* Paired FPRs are always ordered little-endian. */
offset = (UNITS_PER_WORD < UNITS_PER_HWFPVALUE ? high_p : byte != 0);
return gen_rtx_REG (word_mode, REGNO (op) + offset);
}
if (MEM_P (op))
return mips_rewrite_small_data (adjust_address (op, word_mode, byte));
return simplify_gen_subreg (word_mode, op, mode, byte);
}
/* Return true if SRC should be moved into DEST using "MULT $0, $0".
SPLIT_TYPE is the condition under which moves should be split. */
static bool
mips_mult_move_p (rtx dest, rtx src, enum mips_split_type split_type)
{
return ((split_type != SPLIT_FOR_SPEED
|| mips_tuning_info.fast_mult_zero_zero_p)
&& src == const0_rtx
&& REG_P (dest)
&& GET_MODE_SIZE (GET_MODE (dest)) == 2 * UNITS_PER_WORD
&& (ISA_HAS_DSP_MULT
? ACC_REG_P (REGNO (dest))
: MD_REG_P (REGNO (dest))));
}
/* Return true if a move from SRC to DEST should be split into two.
SPLIT_TYPE describes the split condition. */
bool
mips_split_move_p (rtx dest, rtx src, enum mips_split_type split_type)
{
/* Check whether the move can be done using some variant of MULT $0,$0. */
if (mips_mult_move_p (dest, src, split_type))
return false;
/* FPR-to-FPR moves can be done in a single instruction, if they're
allowed at all. */
unsigned int size = GET_MODE_SIZE (GET_MODE (dest));
if (size == 8 && FP_REG_RTX_P (src) && FP_REG_RTX_P (dest))
return false;
/* Check for floating-point loads and stores. */
if (size == 8 && ISA_HAS_LDC1_SDC1)
{
if (FP_REG_RTX_P (dest) && MEM_P (src))
return false;
if (FP_REG_RTX_P (src) && MEM_P (dest))
return false;
}
/* Check if MSA moves need splitting. */
if (MSA_SUPPORTED_MODE_P (GET_MODE (dest)))
return mips_split_128bit_move_p (dest, src);
/* Otherwise split all multiword moves. */
return size > UNITS_PER_WORD;
}
/* Split a move from SRC to DEST, given that mips_split_move_p holds.
SPLIT_TYPE describes the split condition. INSN is the insn being
split, if we know it, NULL otherwise. */
void
mips_split_move (rtx dest, rtx src, enum mips_split_type split_type, rtx insn_)
{
rtx low_dest;
gcc_checking_assert (mips_split_move_p (dest, src, split_type));
if (MSA_SUPPORTED_MODE_P (GET_MODE (dest)))
mips_split_128bit_move (dest, src);
else if (FP_REG_RTX_P (dest) || FP_REG_RTX_P (src))
{
if (!TARGET_64BIT && GET_MODE (dest) == DImode)
emit_insn (gen_move_doubleword_fprdi (dest, src));
else if (!TARGET_64BIT && GET_MODE (dest) == DFmode)
emit_insn (gen_move_doubleword_fprdf (dest, src));
else if (!TARGET_64BIT && GET_MODE (dest) == V2SFmode)
emit_insn (gen_move_doubleword_fprv2sf (dest, src));
else if (!TARGET_64BIT && GET_MODE (dest) == V2SImode)
emit_insn (gen_move_doubleword_fprv2si (dest, src));
else if (!TARGET_64BIT && GET_MODE (dest) == V4HImode)
emit_insn (gen_move_doubleword_fprv4hi (dest, src));
else if (!TARGET_64BIT && GET_MODE (dest) == V8QImode)
emit_insn (gen_move_doubleword_fprv8qi (dest, src));
else if (TARGET_64BIT && GET_MODE (dest) == TFmode)
emit_insn (gen_move_doubleword_fprtf (dest, src));
else
gcc_unreachable ();
}
else if (REG_P (dest) && REGNO (dest) == MD_REG_FIRST)
{
low_dest = mips_subword (dest, false);
mips_emit_move (low_dest, mips_subword (src, false));
if (TARGET_64BIT)
emit_insn (gen_mthidi_ti (dest, mips_subword (src, true), low_dest));
else
emit_insn (gen_mthisi_di (dest, mips_subword (src, true), low_dest));
}
else if (REG_P (src) && REGNO (src) == MD_REG_FIRST)
{
mips_emit_move (mips_subword (dest, false), mips_subword (src, false));
if (TARGET_64BIT)
emit_insn (gen_mfhidi_ti (mips_subword (dest, true), src));
else
emit_insn (gen_mfhisi_di (mips_subword (dest, true), src));
}
else
{
/* The operation can be split into two normal moves. Decide in
which order to do them. */
low_dest = mips_subword (dest, false);
if (REG_P (low_dest)
&& reg_overlap_mentioned_p (low_dest, src))
{
mips_emit_move (mips_subword (dest, true), mips_subword (src, true));
mips_emit_move (low_dest, mips_subword (src, false));
}
else
{
mips_emit_move (low_dest, mips_subword (src, false));
mips_emit_move (mips_subword (dest, true), mips_subword (src, true));
}
}
/* This is a hack. See if the next insn uses DEST and if so, see if we
can forward SRC for DEST. This is most useful if the next insn is a
simple store. */
rtx_insn *insn = (rtx_insn *)insn_;
struct mips_address_info addr = {};
if (insn)
{
rtx_insn *next = next_nonnote_nondebug_insn_bb (insn);
if (next)
{
rtx set = single_set (next);
if (set && SET_SRC (set) == dest)
{
if (MEM_P (src))
{
rtx tmp = XEXP (src, 0);
mips_classify_address (&addr, tmp, GET_MODE (tmp), true);
if (addr.reg && !reg_overlap_mentioned_p (dest, addr.reg))
validate_change (next, &SET_SRC (set), src, false);
}
else
validate_change (next, &SET_SRC (set), src, false);
}
}
}
}
/* Return the split type for instruction INSN. */
static enum mips_split_type
mips_insn_split_type (rtx insn)
{
basic_block bb = BLOCK_FOR_INSN (insn);
if (bb)
{
if (optimize_bb_for_speed_p (bb))
return SPLIT_FOR_SPEED;
else
return SPLIT_FOR_SIZE;
}
/* Once CFG information has been removed, we should trust the optimization
decisions made by previous passes and only split where necessary. */
return SPLIT_IF_NECESSARY;
}
/* Return true if a 128-bit move from SRC to DEST should be split. */
bool
mips_split_128bit_move_p (rtx dest, rtx src)
{
/* MSA-to-MSA moves can be done in a single instruction. */
if (FP_REG_RTX_P (src) && FP_REG_RTX_P (dest))
return false;
/* Check for MSA loads and stores. */
if (FP_REG_RTX_P (dest) && MEM_P (src))
return false;
if (FP_REG_RTX_P (src) && MEM_P (dest))
return false;
/* Check for MSA set to an immediate const vector with valid replicated
element. */
if (FP_REG_RTX_P (dest)
&& mips_const_vector_same_int_p (src, GET_MODE (src), -512, 511))
return false;
/* Check for MSA load zero immediate. */
if (FP_REG_RTX_P (dest) && src == CONST0_RTX (GET_MODE (src)))
return false;
return true;
}
/* Split a 128-bit move from SRC to DEST. */
void
mips_split_128bit_move (rtx dest, rtx src)
{
int byte, index;
rtx low_dest, low_src, d, s;
if (FP_REG_RTX_P (dest))
{
gcc_assert (!MEM_P (src));
rtx new_dest = dest;
if (!TARGET_64BIT)
{
if (GET_MODE (dest) != V4SImode)
new_dest = simplify_gen_subreg (V4SImode, dest, GET_MODE (dest), 0);
}
else
{
if (GET_MODE (dest) != V2DImode)
new_dest = simplify_gen_subreg (V2DImode, dest, GET_MODE (dest), 0);
}
for (byte = 0, index = 0; byte < GET_MODE_SIZE (TImode);
byte += UNITS_PER_WORD, index++)
{
s = mips_subword_at_byte (src, byte);
if (!TARGET_64BIT)
emit_insn (gen_msa_insert_w (new_dest, s, new_dest,
GEN_INT (1 << index)));
else
emit_insn (gen_msa_insert_d (new_dest, s, new_dest,
GEN_INT (1 << index)));
}
}
else if (FP_REG_RTX_P (src))
{
gcc_assert (!MEM_P (dest));
rtx new_src = src;
if (!TARGET_64BIT)
{
if (GET_MODE (src) != V4SImode)
new_src = simplify_gen_subreg (V4SImode, src, GET_MODE (src), 0);
}
else
{
if (GET_MODE (src) != V2DImode)
new_src = simplify_gen_subreg (V2DImode, src, GET_MODE (src), 0);
}
for (byte = 0, index = 0; byte < GET_MODE_SIZE (TImode);
byte += UNITS_PER_WORD, index++)
{
d = mips_subword_at_byte (dest, byte);
if (!TARGET_64BIT)
emit_insn (gen_msa_copy_s_w (d, new_src, GEN_INT (index)));
else
emit_insn (gen_msa_copy_s_d (d, new_src, GEN_INT (index)));
}
}
else
{
low_dest = mips_subword_at_byte (dest, 0);
low_src = mips_subword_at_byte (src, 0);
gcc_assert (REG_P (low_dest) && REG_P (low_src));
/* Make sure the source register is not written before reading. */
if (REGNO (low_dest) <= REGNO (low_src))
{
for (byte = 0; byte < GET_MODE_SIZE (TImode);
byte += UNITS_PER_WORD)
{
d = mips_subword_at_byte (dest, byte);
s = mips_subword_at_byte (src, byte);
mips_emit_move (d, s);
}
}
else
{
for (byte = GET_MODE_SIZE (TImode) - UNITS_PER_WORD; byte >= 0;
byte -= UNITS_PER_WORD)
{
d = mips_subword_at_byte (dest, byte);
s = mips_subword_at_byte (src, byte);
mips_emit_move (d, s);
}
}
}
}
/* Split a COPY_S.D with operands DEST, SRC and INDEX. GEN is a function
used to generate subregs. */
void
mips_split_msa_copy_d (rtx dest, rtx src, rtx index,
rtx (*gen_fn)(rtx, rtx, rtx))
{
gcc_assert ((GET_MODE (src) == V2DImode && GET_MODE (dest) == DImode)
|| (GET_MODE (src) == V2DFmode && GET_MODE (dest) == DFmode));
/* Note that low is always from the lower index, and high is always
from the higher index. */
rtx low = mips_subword (dest, false);
rtx high = mips_subword (dest, true);
rtx new_src = simplify_gen_subreg (V4SImode, src, GET_MODE (src), 0);
emit_insn (gen_fn (low, new_src, GEN_INT (INTVAL (index) * 2)));
emit_insn (gen_fn (high, new_src, GEN_INT (INTVAL (index) * 2 + 1)));
}
/* Split a INSERT.D with operand DEST, SRC1.INDEX and SRC2. */
void
mips_split_msa_insert_d (rtx dest, rtx src1, rtx index, rtx src2)
{
int i;
gcc_assert (GET_MODE (dest) == GET_MODE (src1));
gcc_assert ((GET_MODE (dest) == V2DImode
&& (GET_MODE (src2) == DImode || src2 == const0_rtx))
|| (GET_MODE (dest) == V2DFmode && GET_MODE (src2) == DFmode));
/* Note that low is always from the lower index, and high is always
from the higher index. */
rtx low = mips_subword (src2, false);
rtx high = mips_subword (src2, true);
rtx new_dest = simplify_gen_subreg (V4SImode, dest, GET_MODE (dest), 0);
rtx new_src1 = simplify_gen_subreg (V4SImode, src1, GET_MODE (src1), 0);
i = exact_log2 (INTVAL (index));
gcc_assert (i != -1);
emit_insn (gen_msa_insert_w (new_dest, low, new_src1,
GEN_INT (1 << (i * 2))));
emit_insn (gen_msa_insert_w (new_dest, high, new_dest,
GEN_INT (1 << (i * 2 + 1))));
}
/* Split FILL.D. */
void
mips_split_msa_fill_d (rtx dest, rtx src)
{
gcc_assert ((GET_MODE (dest) == V2DImode
&& (GET_MODE (src) == DImode || src == const0_rtx))
|| (GET_MODE (dest) == V2DFmode && GET_MODE (src) == DFmode));
/* Note that low is always from the lower index, and high is always
from the higher index. */
rtx low, high;
if (src == const0_rtx)
{
low = src;
high = src;
}
else
{
low = mips_subword (src, false);
high = mips_subword (src, true);
}
rtx new_dest = simplify_gen_subreg (V4SImode, dest, GET_MODE (dest), 0);
emit_insn (gen_msa_fill_w (new_dest, low));
emit_insn (gen_msa_insert_w (new_dest, high, new_dest, GEN_INT (1 << 1)));
emit_insn (gen_msa_insert_w (new_dest, high, new_dest, GEN_INT (1 << 3)));
}
/* Return true if a move from SRC to DEST in INSN should be split. */
bool
mips_split_move_insn_p (rtx dest, rtx src, rtx insn)
{
return mips_split_move_p (dest, src, mips_insn_split_type (insn));
}
/* Split a move from SRC to DEST in INSN, given that mips_split_move_insn_p
holds. */
void
mips_split_move_insn (rtx dest, rtx src, rtx insn)
{
mips_split_move (dest, src, mips_insn_split_type (insn), insn);
}
/* Return the appropriate instructions to move SRC into DEST. Assume
that SRC is operand 1 and DEST is operand 0. */
const char *
mips_output_move (rtx dest, rtx src)
{
enum rtx_code dest_code = GET_CODE (dest);
enum rtx_code src_code = GET_CODE (src);
machine_mode mode = GET_MODE (dest);
bool dbl_p = (GET_MODE_SIZE (mode) == 8);
bool msa_p = MSA_SUPPORTED_MODE_P (mode);
enum mips_symbol_type symbol_type;
if (mips_split_move_p (dest, src, SPLIT_IF_NECESSARY))
return "#";
if (msa_p
&& dest_code == REG && FP_REG_P (REGNO (dest))
&& src_code == CONST_VECTOR
&& CONST_INT_P (CONST_VECTOR_ELT (src, 0)))
{
gcc_assert (mips_const_vector_same_int_p (src, mode, -512, 511));
return "ldi.%v0\t%w0,%E1";
}
if ((src_code == REG && GP_REG_P (REGNO (src)))
|| (!TARGET_MIPS16 && src == CONST0_RTX (mode)))
{
if (dest_code == REG)
{
if (GP_REG_P (REGNO (dest)))
return "move\t%0,%z1";
if (mips_mult_move_p (dest, src, SPLIT_IF_NECESSARY))
{
if (ISA_HAS_DSP_MULT)
return "mult\t%q0,%.,%.";
else
return "mult\t%.,%.";
}
/* Moves to HI are handled by special .md insns. */
if (REGNO (dest) == LO_REGNUM)
return "mtlo\t%z1";
if (DSP_ACC_REG_P (REGNO (dest)))
{
static char retval[] = "mt__\t%z1,%q0";
retval[2] = reg_names[REGNO (dest)][4];
retval[3] = reg_names[REGNO (dest)][5];
return retval;
}
if (FP_REG_P (REGNO (dest)))
{
if (msa_p)
{
gcc_assert (src == CONST0_RTX (GET_MODE (src)));
return "ldi.%v0\t%w0,0";
}
return dbl_p ? "dmtc1\t%z1,%0" : "mtc1\t%z1,%0";
}
if (ALL_COP_REG_P (REGNO (dest)))
{
static char retval[] = "dmtc_\t%z1,%0";
retval[4] = COPNUM_AS_CHAR_FROM_REGNUM (REGNO (dest));
return dbl_p ? retval : retval + 1;
}
}
if (dest_code == MEM)
switch (GET_MODE_SIZE (mode))
{
case 1: return "sb\t%z1,%0";
case 2: return "sh\t%z1,%0";
case 4: return "sw\t%z1,%0";
case 8: return "sd\t%z1,%0";
default: gcc_unreachable ();
}
}
if (dest_code == REG && GP_REG_P (REGNO (dest)))
{
if (src_code == REG)
{
/* Moves from HI are handled by special .md insns. */
if (REGNO (src) == LO_REGNUM)
{
/* When generating VR4120 or VR4130 code, we use MACC and
DMACC instead of MFLO. This avoids both the normal
MIPS III HI/LO hazards and the errata related to
-mfix-vr4130. */
if (ISA_HAS_MACCHI)
return dbl_p ? "dmacc\t%0,%.,%." : "macc\t%0,%.,%.";
return "mflo\t%0";
}
if (DSP_ACC_REG_P (REGNO (src)))
{
static char retval[] = "mf__\t%0,%q1";
retval[2] = reg_names[REGNO (src)][4];
retval[3] = reg_names[REGNO (src)][5];
return retval;
}
if (FP_REG_P (REGNO (src)))
{
gcc_assert (!msa_p);
return dbl_p ? "dmfc1\t%0,%1" : "mfc1\t%0,%1";
}
if (ALL_COP_REG_P (REGNO (src)))
{
static char retval[] = "dmfc_\t%0,%1";
retval[4] = COPNUM_AS_CHAR_FROM_REGNUM (REGNO (src));
return dbl_p ? retval : retval + 1;
}
}
if (src_code == MEM)
switch (GET_MODE_SIZE (mode))
{
case 1: return "lbu\t%0,%1";
case 2: return "lhu\t%0,%1";
case 4: return "lw\t%0,%1";
case 8: return "ld\t%0,%1";
default: gcc_unreachable ();
}
if (src_code == CONST_INT)
{
/* Don't use the X format for the operand itself, because that
will give out-of-range numbers for 64-bit hosts and 32-bit
targets. */
if (!TARGET_MIPS16)
return "li\t%0,%1\t\t\t# %X1";
if (SMALL_OPERAND_UNSIGNED (INTVAL (src)))
return "li\t%0,%1";
if (SMALL_OPERAND_UNSIGNED (-INTVAL (src)))
return "#";
}
if (src_code == HIGH)
return TARGET_MIPS16 ? "#" : "lui\t%0,%h1";
if (CONST_GP_P (src))
return "move\t%0,%1";
if (mips_symbolic_constant_p (src, SYMBOL_CONTEXT_LEA, &symbol_type)
&& mips_lo_relocs[symbol_type] != 0)
{
/* A signed 16-bit constant formed by applying a relocation
operator to a symbolic address. */
gcc_assert (!mips_split_p[symbol_type]);
return "li\t%0,%R1";
}
if (symbolic_operand (src, VOIDmode))
{
gcc_assert (TARGET_MIPS16
? TARGET_MIPS16_TEXT_LOADS
: !TARGET_EXPLICIT_RELOCS);
return dbl_p ? "dla\t%0,%1" : "la\t%0,%1";
}
}
if (src_code == REG && FP_REG_P (REGNO (src)))
{
if (dest_code == REG && FP_REG_P (REGNO (dest)))
{
if (GET_MODE (dest) == V2SFmode)
return "mov.ps\t%0,%1";
else if (msa_p)
return "move.v\t%w0,%w1";
else
return dbl_p ? "mov.d\t%0,%1" : "mov.s\t%0,%1";
}
if (dest_code == MEM)
{
if (msa_p)
return "st.%v1\t%w1,%0";
return dbl_p ? "sdc1\t%1,%0" : "swc1\t%1,%0";
}
}
if (dest_code == REG && FP_REG_P (REGNO (dest)))
{
if (src_code == MEM)
{
if (msa_p)
return "ld.%v0\t%w0,%1";
return dbl_p ? "ldc1\t%0,%1" : "lwc1\t%0,%1";
}
}
if (dest_code == REG && ALL_COP_REG_P (REGNO (dest)) && src_code == MEM)
{
static char retval[] = "l_c_\t%0,%1";
retval[1] = (dbl_p ? 'd' : 'w');
retval[3] = COPNUM_AS_CHAR_FROM_REGNUM (REGNO (dest));
return retval;
}
if (dest_code == MEM && src_code == REG && ALL_COP_REG_P (REGNO (src)))
{
static char retval[] = "s_c_\t%1,%0";
retval[1] = (dbl_p ? 'd' : 'w');
retval[3] = COPNUM_AS_CHAR_FROM_REGNUM (REGNO (src));
return retval;
}
gcc_unreachable ();
}
/* Return true if CMP1 is a suitable second operand for integer ordering
test CODE. See also the *sCC patterns in mips.md. */
static bool
mips_int_order_operand_ok_p (enum rtx_code code, rtx cmp1)
{
switch (code)
{
case GT:
case GTU:
return reg_or_0_operand (cmp1, VOIDmode);
case GE:
case GEU:
return !TARGET_MIPS16 && cmp1 == const1_rtx;
case LT:
case LTU:
return arith_operand (cmp1, VOIDmode);
case LE:
return sle_operand (cmp1, VOIDmode);
case LEU:
return sleu_operand (cmp1, VOIDmode);
default:
gcc_unreachable ();
}
}
/* Return true if *CMP1 (of mode MODE) is a valid second operand for
integer ordering test *CODE, or if an equivalent combination can
be formed by adjusting *CODE and *CMP1. When returning true, update
*CODE and *CMP1 with the chosen code and operand, otherwise leave
them alone. */
static bool
mips_canonicalize_int_order_test (enum rtx_code *code, rtx *cmp1,
machine_mode mode)
{
HOST_WIDE_INT plus_one;
if (mips_int_order_operand_ok_p (*code, *cmp1))
return true;
if (CONST_INT_P (*cmp1))
switch (*code)
{
case LE:
plus_one = trunc_int_for_mode (UINTVAL (*cmp1) + 1, mode);
if (INTVAL (*cmp1) < plus_one)
{
*code = LT;
*cmp1 = force_reg (mode, GEN_INT (plus_one));
return true;
}
break;
case LEU:
plus_one = trunc_int_for_mode (UINTVAL (*cmp1) + 1, mode);
if (plus_one != 0)
{
*code = LTU;
*cmp1 = force_reg (mode, GEN_INT (plus_one));
return true;
}
break;
default:
break;
}
return false;
}
/* Compare CMP0 and CMP1 using ordering test CODE and store the result
in TARGET. CMP0 and TARGET are register_operands. If INVERT_PTR
is nonnull, it's OK to set TARGET to the inverse of the result and
flip *INVERT_PTR instead. */
static void
mips_emit_int_order_test (enum rtx_code code, bool *invert_ptr,
rtx target, rtx cmp0, rtx cmp1)
{
machine_mode mode;
/* First see if there is a MIPS instruction that can do this operation.
If not, try doing the same for the inverse operation. If that also
fails, force CMP1 into a register and try again. */
mode = GET_MODE (cmp0);
if (mips_canonicalize_int_order_test (&code, &cmp1, mode))
mips_emit_binary (code, target, cmp0, cmp1);
else
{
enum rtx_code inv_code = reverse_condition (code);
if (!mips_canonicalize_int_order_test (&inv_code, &cmp1, mode))
{
cmp1 = force_reg (mode, cmp1);
mips_emit_int_order_test (code, invert_ptr, target, cmp0, cmp1);
}
else if (invert_ptr == 0)
{
rtx inv_target;
inv_target = mips_force_binary (GET_MODE (target),
inv_code, cmp0, cmp1);
mips_emit_binary (XOR, target, inv_target, const1_rtx);
}
else
{
*invert_ptr = !*invert_ptr;
mips_emit_binary (inv_code, target, cmp0, cmp1);
}
}
}
/* Return a register that is zero iff CMP0 and CMP1 are equal.
The register will have the same mode as CMP0. */
static rtx
mips_zero_if_equal (rtx cmp0, rtx cmp1)
{
if (cmp1 == const0_rtx)
return cmp0;
if (uns_arith_operand (cmp1, VOIDmode))
return expand_binop (GET_MODE (cmp0), xor_optab,
cmp0, cmp1, 0, 0, OPTAB_DIRECT);
return expand_binop (GET_MODE (cmp0), sub_optab,
cmp0, cmp1, 0, 0, OPTAB_DIRECT);
}
/* Convert *CODE into a code that can be used in a floating-point
scc instruction (C.cond.fmt). Return true if the values of
the condition code registers will be inverted, with 0 indicating
that the condition holds. */
static bool
mips_reversed_fp_cond (enum rtx_code *code)
{
switch (*code)
{
case NE:
case LTGT:
case ORDERED:
*code = reverse_condition_maybe_unordered (*code);
return true;
default:
return false;
}
}
/* Allocate a floating-point condition-code register of mode MODE.
These condition code registers are used for certain kinds
of compound operation, such as compare and branches, vconds,
and built-in functions. At expand time, their use is entirely
controlled by MIPS-specific code and is entirely internal
to these compound operations.
We could (and did in the past) expose condition-code values
as pseudo registers and leave the register allocator to pick
appropriate registers. The problem is that it is not practically
possible for the rtl optimizers to guarantee that no spills will
be needed, even when AVOID_CCMODE_COPIES is defined. We would
therefore need spill and reload sequences to handle the worst case.
Although such sequences do exist, they are very expensive and are
not something we'd want to use. This is especially true of CCV2 and
CCV4, where all the shuffling would greatly outweigh whatever benefit
the vectorization itself provides.
The main benefit of having more than one condition-code register
is to allow the pipelining of operations, especially those involving
comparisons and conditional moves. We don't really expect the
registers to be live for long periods, and certainly never want
them to be live across calls.
Also, there should be no penalty attached to using all the available
registers. They are simply bits in the same underlying FPU control
register.
We therefore expose the hardware registers from the outset and use
a simple round-robin allocation scheme. */
static rtx
mips_allocate_fcc (machine_mode mode)
{
unsigned int regno, count;
gcc_assert (TARGET_HARD_FLOAT && ISA_HAS_8CC);
if (mode == CCmode)
count = 1;
else if (mode == CCV2mode)
count = 2;
else if (mode == CCV4mode)
count = 4;
else
gcc_unreachable ();
cfun->machine->next_fcc += -cfun->machine->next_fcc & (count - 1);
if (cfun->machine->next_fcc > ST_REG_LAST - ST_REG_FIRST)
cfun->machine->next_fcc = 0;
regno = ST_REG_FIRST + cfun->machine->next_fcc;
cfun->machine->next_fcc += count;
return gen_rtx_REG (mode, regno);
}
/* Convert a comparison into something that can be used in a branch or
conditional move. On entry, *OP0 and *OP1 are the values being
compared and *CODE is the code used to compare them.
Update *CODE, *OP0 and *OP1 so that they describe the final comparison.
If NEED_EQ_NE_P, then only EQ or NE comparisons against zero are possible,
otherwise any standard branch condition can be used. The standard branch
conditions are:
- EQ or NE between two registers.
- any comparison between a register and zero.
- if compact branches are available then any condition is valid. */
static void
mips_emit_compare (enum rtx_code *code, rtx *op0, rtx *op1, bool need_eq_ne_p)
{
rtx cmp_op0 = *op0;
rtx cmp_op1 = *op1;
if (GET_MODE_CLASS (GET_MODE (*op0)) == MODE_INT)
{
if (!need_eq_ne_p && *op1 == const0_rtx)
;
else if (*code == EQ || *code == NE)
{
if (need_eq_ne_p)
{
*op0 = mips_zero_if_equal (cmp_op0, cmp_op1);
*op1 = const0_rtx;
}
else
*op1 = force_reg (GET_MODE (cmp_op0), cmp_op1);
}
else if (!need_eq_ne_p && TARGET_CB_MAYBE)
{
bool swap = false;
switch (*code)
{
case LE:
swap = true;
*code = GE;
break;
case GT:
swap = true;
*code = LT;
break;
case LEU:
swap = true;
*code = GEU;
break;
case GTU:
swap = true;
*code = LTU;
break;
case GE:
case LT:
case GEU:
case LTU:
/* Do nothing. */
break;
default:
gcc_unreachable ();
}
*op1 = force_reg (GET_MODE (cmp_op0), cmp_op1);
if (swap)
{
rtx tmp = *op1;
*op1 = *op0;
*op0 = tmp;
}
}
else
{
/* The comparison needs a separate scc instruction. Store the
result of the scc in *OP0 and compare it against zero. */
bool invert = false;
*op0 = gen_reg_rtx (GET_MODE (cmp_op0));
mips_emit_int_order_test (*code, &invert, *op0, cmp_op0, cmp_op1);
*code = (invert ? EQ : NE);
*op1 = const0_rtx;
}
}
else if (ALL_FIXED_POINT_MODE_P (GET_MODE (cmp_op0)))
{
*op0 = gen_rtx_REG (CCDSPmode, CCDSP_CC_REGNUM);
mips_emit_binary (*code, *op0, cmp_op0, cmp_op1);
*code = NE;
*op1 = const0_rtx;
}
else
{
enum rtx_code cmp_code;
/* Floating-point tests use a separate C.cond.fmt or CMP.cond.fmt
comparison to set a register. The branch or conditional move will
then compare that register against zero.
Set CMP_CODE to the code of the comparison instruction and
*CODE to the code that the branch or move should use. */
cmp_code = *code;
if (ISA_HAS_CCF)
{
/* All FP conditions can be implemented directly with CMP.cond.fmt
or by reversing the operands. */
*code = NE;
*op0 = gen_reg_rtx (CCFmode);
}
else
{
/* Three FP conditions cannot be implemented by reversing the
operands for C.cond.fmt, instead a reversed condition code is
required and a test for false. */
*code = mips_reversed_fp_cond (&cmp_code) ? EQ : NE;
if (ISA_HAS_8CC)
*op0 = mips_allocate_fcc (CCmode);
else
*op0 = gen_rtx_REG (CCmode, FPSW_REGNUM);
}
*op1 = const0_rtx;
mips_emit_binary (cmp_code, *op0, cmp_op0, cmp_op1);
}
}
/* Try performing the comparison in OPERANDS[1], whose arms are OPERANDS[2]
and OPERAND[3]. Store the result in OPERANDS[0].
On 64-bit targets, the mode of the comparison and target will always be
SImode, thus possibly narrower than that of the comparison's operands. */
void
mips_expand_scc (rtx operands[])
{
rtx target = operands[0];
enum rtx_code code = GET_CODE (operands[1]);
rtx op0 = operands[2];
rtx op1 = operands[3];
gcc_assert (GET_MODE_CLASS (GET_MODE (op0)) == MODE_INT);
if (code == EQ || code == NE)
{
if (ISA_HAS_SEQ_SNE
&& reg_imm10_operand (op1, GET_MODE (op1)))
mips_emit_binary (code, target, op0, op1);
else
{
rtx zie = mips_zero_if_equal (op0, op1);
mips_emit_binary (code, target, zie, const0_rtx);
}
}
else
mips_emit_int_order_test (code, 0, target, op0, op1);
}
/* Compare OPERANDS[1] with OPERANDS[2] using comparison code
CODE and jump to OPERANDS[3] if the condition holds. */
void
mips_expand_conditional_branch (rtx *operands)
{
enum rtx_code code = GET_CODE (operands[0]);
rtx op0 = operands[1];
rtx op1 = operands[2];
rtx condition;
mips_emit_compare (&code, &op0, &op1, TARGET_MIPS16);
condition = gen_rtx_fmt_ee (code, VOIDmode, op0, op1);
emit_jump_insn (gen_condjump (condition, operands[3]));
}
/* Implement:
(set temp (COND:CCV2 CMP_OP0 CMP_OP1))
(set DEST (unspec [TRUE_SRC FALSE_SRC temp] UNSPEC_MOVE_TF_PS)) */
void
mips_expand_vcondv2sf (rtx dest, rtx true_src, rtx false_src,
enum rtx_code cond, rtx cmp_op0, rtx cmp_op1)
{
rtx cmp_result;
bool reversed_p;
reversed_p = mips_reversed_fp_cond (&cond);
cmp_result = mips_allocate_fcc (CCV2mode);
emit_insn (gen_scc_ps (cmp_result,
gen_rtx_fmt_ee (cond, VOIDmode, cmp_op0, cmp_op1)));
if (reversed_p)
emit_insn (gen_mips_cond_move_tf_ps (dest, false_src, true_src,
cmp_result));
else
emit_insn (gen_mips_cond_move_tf_ps (dest, true_src, false_src,
cmp_result));
}
/* Perform the comparison in OPERANDS[1]. Move OPERANDS[2] into OPERANDS[0]
if the condition holds, otherwise move OPERANDS[3] into OPERANDS[0]. */
void
mips_expand_conditional_move (rtx *operands)
{
rtx cond;
enum rtx_code code = GET_CODE (operands[1]);
rtx op0 = XEXP (operands[1], 0);
rtx op1 = XEXP (operands[1], 1);
mips_emit_compare (&code, &op0, &op1, true);
cond = gen_rtx_fmt_ee (code, GET_MODE (op0), op0, op1);
/* There is no direct support for general conditional GP move involving
two registers using SEL. */
if (ISA_HAS_SEL
&& INTEGRAL_MODE_P (GET_MODE (operands[2]))
&& register_operand (operands[2], VOIDmode)
&& register_operand (operands[3], VOIDmode))
{
machine_mode mode = GET_MODE (operands[0]);
rtx temp = gen_reg_rtx (mode);
rtx temp2 = gen_reg_rtx (mode);
emit_insn (gen_rtx_SET (temp,
gen_rtx_IF_THEN_ELSE (mode, cond,
operands[2], const0_rtx)));
/* Flip the test for the second operand. */
cond = gen_rtx_fmt_ee ((code == EQ) ? NE : EQ, GET_MODE (op0), op0, op1);
emit_insn (gen_rtx_SET (temp2,
gen_rtx_IF_THEN_ELSE (mode, cond,
operands[3], const0_rtx)));
/* Merge the two results, at least one is guaranteed to be zero. */
emit_insn (gen_rtx_SET (operands[0], gen_rtx_IOR (mode, temp, temp2)));
}
else
{
if (FLOAT_MODE_P (GET_MODE (operands[2])) && !ISA_HAS_SEL)
{
operands[2] = force_reg (GET_MODE (operands[0]), operands[2]);
operands[3] = force_reg (GET_MODE (operands[0]), operands[3]);
}
emit_insn (gen_rtx_SET (operands[0],
gen_rtx_IF_THEN_ELSE (GET_MODE (operands[0]), cond,
operands[2], operands[3])));
}
}
/* Perform the comparison in COMPARISON, then trap if the condition holds. */
void
mips_expand_conditional_trap (rtx comparison)
{
rtx op0, op1;
machine_mode mode;
enum rtx_code code;
/* MIPS conditional trap instructions don't have GT or LE flavors,
so we must swap the operands and convert to LT and GE respectively. */
code = GET_CODE (comparison);
switch (code)
{
case GT:
case LE:
case GTU:
case LEU:
code = swap_condition (code);
op0 = XEXP (comparison, 1);
op1 = XEXP (comparison, 0);
break;
default:
op0 = XEXP (comparison, 0);
op1 = XEXP (comparison, 1);
break;
}
mode = GET_MODE (XEXP (comparison, 0));
op0 = force_reg (mode, op0);
if (!(ISA_HAS_COND_TRAPI
? arith_operand (op1, mode)
: reg_or_0_operand (op1, mode)))
op1 = force_reg (mode, op1);
emit_insn (gen_rtx_TRAP_IF (VOIDmode,
gen_rtx_fmt_ee (code, mode, op0, op1),
const0_rtx));
}
/* Initialize *CUM for a call to a function of type FNTYPE. */
void
mips_init_cumulative_args (CUMULATIVE_ARGS *cum, tree fntype)
{
memset (cum, 0, sizeof (*cum));
cum->prototype = (fntype && prototype_p (fntype));
cum->gp_reg_found = (cum->prototype && stdarg_p (fntype));
}
/* Fill INFO with information about a single argument. CUM is the
cumulative state for earlier arguments. MODE is the mode of this
argument and TYPE is its type (if known). NAMED is true if this
is a named (fixed) argument rather than a variable one. */
static void
mips_get_arg_info (struct mips_arg_info *info, const CUMULATIVE_ARGS *cum,
machine_mode mode, const_tree type, bool named)
{
bool doubleword_aligned_p;
unsigned int num_bytes, num_words, max_regs;
/* Work out the size of the argument. */
num_bytes = type ? int_size_in_bytes (type) : GET_MODE_SIZE (mode);
num_words = (num_bytes + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
/* Decide whether it should go in a floating-point register, assuming
one is free. Later code checks for availability.
The checks against UNITS_PER_FPVALUE handle the soft-float and
single-float cases. */
switch (mips_abi)
{
case ABI_EABI:
/* The EABI conventions have traditionally been defined in terms
of TYPE_MODE, regardless of the actual type. */
info->fpr_p = ((GET_MODE_CLASS (mode) == MODE_FLOAT
|| mode == V2SFmode)
&& GET_MODE_SIZE (mode) <= UNITS_PER_FPVALUE);
break;
case ABI_32:
case ABI_O64:
/* Only leading floating-point scalars are passed in
floating-point registers. We also handle vector floats the same
say, which is OK because they are not covered by the standard ABI. */
gcc_assert (TARGET_PAIRED_SINGLE_FLOAT || mode != V2SFmode);
info->fpr_p = (!cum->gp_reg_found
&& cum->arg_number < 2
&& (type == 0
|| SCALAR_FLOAT_TYPE_P (type)
|| VECTOR_FLOAT_TYPE_P (type))
&& (GET_MODE_CLASS (mode) == MODE_FLOAT
|| mode == V2SFmode)
&& GET_MODE_SIZE (mode) <= UNITS_PER_FPVALUE);
break;
case ABI_N32:
case ABI_64:
/* Scalar, complex and vector floating-point types are passed in
floating-point registers, as long as this is a named rather
than a variable argument. */
gcc_assert (TARGET_PAIRED_SINGLE_FLOAT || mode != V2SFmode);
info->fpr_p = (named
&& (type == 0 || FLOAT_TYPE_P (type))
&& (GET_MODE_CLASS (mode) == MODE_FLOAT
|| GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT
|| mode == V2SFmode)
&& GET_MODE_UNIT_SIZE (mode) <= UNITS_PER_FPVALUE);
/* ??? According to the ABI documentation, the real and imaginary
parts of complex floats should be passed in individual registers.
The real and imaginary parts of stack arguments are supposed
to be contiguous and there should be an extra word of padding
at the end.
This has two problems. First, it makes it impossible to use a
single "void *" va_list type, since register and stack arguments
are passed differently. (At the time of writing, MIPSpro cannot
handle complex float varargs correctly.) Second, it's unclear
what should happen when there is only one register free.
For now, we assume that named complex floats should go into FPRs
if there are two FPRs free, otherwise they should be passed in the
same way as a struct containing two floats. */
if (info->fpr_p
&& GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT
&& GET_MODE_UNIT_SIZE (mode) < UNITS_PER_FPVALUE)
{
if (cum->num_gprs >= MAX_ARGS_IN_REGISTERS - 1)
info->fpr_p = false;
else
num_words = 2;
}
break;
default:
gcc_unreachable ();
}
/* See whether the argument has doubleword alignment. */
doubleword_aligned_p = (mips_function_arg_boundary (mode, type)
> BITS_PER_WORD);
/* Set REG_OFFSET to the register count we're interested in.
The EABI allocates the floating-point registers separately,
but the other ABIs allocate them like integer registers. */
info->reg_offset = (mips_abi == ABI_EABI && info->fpr_p
? cum->num_fprs
: cum->num_gprs);
/* Advance to an even register if the argument is doubleword-aligned. */
if (doubleword_aligned_p)
info->reg_offset += info->reg_offset & 1;
/* Work out the offset of a stack argument. */
info->stack_offset = cum->stack_words;
if (doubleword_aligned_p)
info->stack_offset += info->stack_offset & 1;
max_regs = MAX_ARGS_IN_REGISTERS - info->reg_offset;
/* Partition the argument between registers and stack. */
info->reg_words = MIN (num_words, max_regs);
info->stack_words = num_words - info->reg_words;
}
/* INFO describes a register argument that has the normal format for the
argument's mode. Return the register it uses, assuming that FPRs are
available if HARD_FLOAT_P. */
static unsigned int
mips_arg_regno (const struct mips_arg_info *info, bool hard_float_p)
{
if (!info->fpr_p || !hard_float_p)
return GP_ARG_FIRST + info->reg_offset;
else if (mips_abi == ABI_32 && TARGET_DOUBLE_FLOAT && info->reg_offset > 0)
/* In o32, the second argument is always passed in $f14
for TARGET_DOUBLE_FLOAT, regardless of whether the
first argument was a word or doubleword. */
return FP_ARG_FIRST + 2;
else
return FP_ARG_FIRST + info->reg_offset;
}
/* Implement TARGET_STRICT_ARGUMENT_NAMING. */
static bool
mips_strict_argument_naming (cumulative_args_t ca ATTRIBUTE_UNUSED)
{
return !TARGET_OLDABI;
}
/* Implement TARGET_FUNCTION_ARG. */
static rtx
mips_function_arg (cumulative_args_t cum_v, const function_arg_info &arg)
{
CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
struct mips_arg_info info;
/* We will be called with an end marker after the last argument
has been seen. Whatever we return will be passed to the call expander.
If we need a MIPS16 fp_code, return a REG with the code stored as
the mode. */
if (arg.end_marker_p ())
{
if (TARGET_MIPS16 && cum->fp_code != 0)
return gen_rtx_REG ((machine_mode) cum->fp_code, 0);
else
return NULL;
}
mips_get_arg_info (&info, cum, arg.mode, arg.type, arg.named);
/* Return straight away if the whole argument is passed on the stack. */
if (info.reg_offset == MAX_ARGS_IN_REGISTERS)
return NULL;
/* The n32 and n64 ABIs say that if any 64-bit chunk of the structure
contains a double in its entirety, then that 64-bit chunk is passed
in a floating-point register. */
if (TARGET_NEWABI
&& TARGET_HARD_FLOAT
&& arg.named
&& arg.type != 0
&& TREE_CODE (arg.type) == RECORD_TYPE
&& TYPE_SIZE_UNIT (arg.type)
&& tree_fits_uhwi_p (TYPE_SIZE_UNIT (arg.type)))
{
tree field;
/* First check to see if there is any such field. */
for (field = TYPE_FIELDS (arg.type); field; field = DECL_CHAIN (field))
if (TREE_CODE (field) == FIELD_DECL
&& SCALAR_FLOAT_TYPE_P (TREE_TYPE (field))
&& TYPE_PRECISION (TREE_TYPE (field)) == BITS_PER_WORD
&& tree_fits_shwi_p (bit_position (field))
&& int_bit_position (field) % BITS_PER_WORD == 0)
break;
if (field != 0)
{
/* Now handle the special case by returning a PARALLEL
indicating where each 64-bit chunk goes. INFO.REG_WORDS
chunks are passed in registers. */
unsigned int i;
HOST_WIDE_INT bitpos;
rtx ret;
/* assign_parms checks the mode of ENTRY_PARM, so we must
use the actual mode here. */
ret = gen_rtx_PARALLEL (arg.mode, rtvec_alloc (info.reg_words));
bitpos = 0;
field = TYPE_FIELDS (arg.type);
for (i = 0; i < info.reg_words; i++)
{
rtx reg;
for (; field; field = DECL_CHAIN (field))
if (TREE_CODE (field) == FIELD_DECL
&& int_bit_position (field) >= bitpos)
break;
if (field
&& int_bit_position (field) == bitpos
&& SCALAR_FLOAT_TYPE_P (TREE_TYPE (field))
&& TYPE_PRECISION (TREE_TYPE (field)) == BITS_PER_WORD)
reg = gen_rtx_REG (DFmode, FP_ARG_FIRST + info.reg_offset + i);
else
reg = gen_rtx_REG (DImode, GP_ARG_FIRST + info.reg_offset + i);
XVECEXP (ret, 0, i)
= gen_rtx_EXPR_LIST (VOIDmode, reg,
GEN_INT (bitpos / BITS_PER_UNIT));
bitpos += BITS_PER_WORD;
}
return ret;
}
}
/* Handle the n32/n64 conventions for passing complex floating-point
arguments in FPR pairs. The real part goes in the lower register
and the imaginary part goes in the upper register. */
if (TARGET_NEWABI
&& info.fpr_p
&& GET_MODE_CLASS (arg.mode) == MODE_COMPLEX_FLOAT)
{
rtx real, imag;
machine_mode inner;
unsigned int regno;
inner = GET_MODE_INNER (arg.mode);
regno = FP_ARG_FIRST + info.reg_offset;
if (info.reg_words * UNITS_PER_WORD == GET_MODE_SIZE (inner))
{
/* Real part in registers, imaginary part on stack. */
gcc_assert (info.stack_words == info.reg_words);
return gen_rtx_REG (inner, regno);
}
else
{
gcc_assert (info.stack_words == 0);
real = gen_rtx_EXPR_LIST (VOIDmode,
gen_rtx_REG (inner, regno),
const0_rtx);
imag = gen_rtx_EXPR_LIST (VOIDmode,
gen_rtx_REG (inner,
regno + info.reg_words / 2),
GEN_INT (GET_MODE_SIZE (inner)));
return gen_rtx_PARALLEL (arg.mode, gen_rtvec (2, real, imag));
}
}
return gen_rtx_REG (arg.mode, mips_arg_regno (&info, TARGET_HARD_FLOAT));
}
/* Implement TARGET_FUNCTION_ARG_ADVANCE. */
static void
mips_function_arg_advance (cumulative_args_t cum_v,
const function_arg_info &arg)
{
CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
struct mips_arg_info info;
mips_get_arg_info (&info, cum, arg.mode, arg.type, arg.named);
if (!info.fpr_p)
cum->gp_reg_found = true;
/* See the comment above the CUMULATIVE_ARGS structure in mips.h for
an explanation of what this code does. It assumes that we're using
either the o32 or the o64 ABI, both of which pass at most 2 arguments
in FPRs. */
if (cum->arg_number < 2 && info.fpr_p)
cum->fp_code += (arg.mode == SFmode ? 1 : 2) << (cum->arg_number * 2);
/* Advance the register count. This has the effect of setting
num_gprs to MAX_ARGS_IN_REGISTERS if a doubleword-aligned
argument required us to skip the final GPR and pass the whole
argument on the stack. */
if (mips_abi != ABI_EABI || !info.fpr_p)
cum->num_gprs = info.reg_offset + info.reg_words;
else if (info.reg_words > 0)
cum->num_fprs += MAX_FPRS_PER_FMT;
/* Advance the stack word count. */
if (info.stack_words > 0)
cum->stack_words = info.stack_offset + info.stack_words;
cum->arg_number++;
}
/* Implement TARGET_ARG_PARTIAL_BYTES. */
static int
mips_arg_partial_bytes (cumulative_args_t cum, const function_arg_info &arg)
{
struct mips_arg_info info;
mips_get_arg_info (&info, get_cumulative_args (cum),
arg.mode, arg.type, arg.named);
return info.stack_words > 0 ? info.reg_words * UNITS_PER_WORD : 0;
}
/* Implement TARGET_FUNCTION_ARG_BOUNDARY. Every parameter gets at
least PARM_BOUNDARY bits of alignment, but will be given anything up
to STACK_BOUNDARY bits if the type requires it. */
static unsigned int
mips_function_arg_boundary (machine_mode mode, const_tree type)
{
unsigned int alignment;
alignment = type ? TYPE_ALIGN (type) : GET_MODE_ALIGNMENT (mode);
if (alignment < PARM_BOUNDARY)
alignment = PARM_BOUNDARY;
if (alignment > STACK_BOUNDARY)
alignment = STACK_BOUNDARY;
return alignment;
}
/* Implement TARGET_GET_RAW_RESULT_MODE and TARGET_GET_RAW_ARG_MODE. */
static fixed_size_mode
mips_get_reg_raw_mode (int regno)
{
if (TARGET_FLOATXX && FP_REG_P (regno))
return DFmode;
return default_get_reg_raw_mode (regno);
}
/* Implement TARGET_FUNCTION_ARG_PADDING; return PAD_UPWARD if the first
byte of the stack slot has useful data, PAD_DOWNWARD if the last byte
does. */
static pad_direction
mips_function_arg_padding (machine_mode mode, const_tree type)
{
/* On little-endian targets, the first byte of every stack argument
is passed in the first byte of the stack slot. */
if (!BYTES_BIG_ENDIAN)
return PAD_UPWARD;
/* Otherwise, integral types are padded downward: the last byte of a
stack argument is passed in the last byte of the stack slot. */
if (type != 0
? (INTEGRAL_TYPE_P (type)
|| POINTER_TYPE_P (type)
|| FIXED_POINT_TYPE_P (type))
: (SCALAR_INT_MODE_P (mode)
|| ALL_SCALAR_FIXED_POINT_MODE_P (mode)))
return PAD_DOWNWARD;
/* Big-endian o64 pads floating-point arguments downward. */
if (mips_abi == ABI_O64)
if (type != 0 ? FLOAT_TYPE_P (type) : GET_MODE_CLASS (mode) == MODE_FLOAT)
return PAD_DOWNWARD;
/* Other types are padded upward for o32, o64, n32 and n64. */
if (mips_abi != ABI_EABI)
return PAD_UPWARD;
/* Arguments smaller than a stack slot are padded downward. */
if (mode != BLKmode
? GET_MODE_BITSIZE (mode) >= PARM_BOUNDARY
: int_size_in_bytes (type) >= (PARM_BOUNDARY / BITS_PER_UNIT))
return PAD_UPWARD;
return PAD_DOWNWARD;
}
/* Likewise BLOCK_REG_PADDING (MODE, TYPE, ...). Return !BYTES_BIG_ENDIAN
if the least significant byte of the register has useful data. Return
the opposite if the most significant byte does. */
bool
mips_pad_reg_upward (machine_mode mode, tree type)
{
/* No shifting is required for floating-point arguments. */
if (type != 0 ? FLOAT_TYPE_P (type) : GET_MODE_CLASS (mode) == MODE_FLOAT)
return !BYTES_BIG_ENDIAN;
/* Otherwise, apply the same padding to register arguments as we do
to stack arguments. */
return mips_function_arg_padding (mode, type) == PAD_UPWARD;
}
/* Return nonzero when an argument must be passed by reference. */
static bool
mips_pass_by_reference (cumulative_args_t, const function_arg_info &arg)
{
if (mips_abi == ABI_EABI)
{
int size;
/* ??? How should SCmode be handled? */
if (arg.mode == DImode || arg.mode == DFmode
|| arg.mode == DQmode || arg.mode == UDQmode
|| arg.mode == DAmode || arg.mode == UDAmode)
return 0;
size = arg.type_size_in_bytes ();
return size == -1 || size > UNITS_PER_WORD;
}
else
{
/* If we have a variable-sized parameter, we have no choice. */
return targetm.calls.must_pass_in_stack (arg);
}
}
/* Implement TARGET_CALLEE_COPIES. */
static bool
mips_callee_copies (cumulative_args_t, const function_arg_info &arg)
{
return mips_abi == ABI_EABI && arg.named;
}
/* See whether VALTYPE is a record whose fields should be returned in
floating-point registers. If so, return the number of fields and
list them in FIELDS (which should have two elements). Return 0
otherwise.
For n32 & n64, a structure with one or two fields is returned in
floating-point registers as long as every field has a floating-point
type. */
static int
mips_fpr_return_fields (const_tree valtype, tree *fields)
{
tree field;
int i;
if (!TARGET_NEWABI)
return 0;
if (TREE_CODE (valtype) != RECORD_TYPE)
return 0;
i = 0;
for (field = TYPE_FIELDS (valtype); field != 0; field = DECL_CHAIN (field))
{
if (TREE_CODE (field) != FIELD_DECL)
continue;
if (!SCALAR_FLOAT_TYPE_P (TREE_TYPE (field)))
return 0;
if (i == 2)
return 0;
fields[i++] = field;
}
return i;
}
/* Implement TARGET_RETURN_IN_MSB. For n32 & n64, we should return
a value in the most significant part of $2/$3 if:
- the target is big-endian;
- the value has a structure or union type (we generalize this to
cover aggregates from other languages too); and
- the structure is not returned in floating-point registers. */
static bool
mips_return_in_msb (const_tree valtype)
{
tree fields[2];
return (TARGET_NEWABI
&& TARGET_BIG_ENDIAN
&& AGGREGATE_TYPE_P (valtype)
&& mips_fpr_return_fields (valtype, fields) == 0);
}
/* Return true if the function return value MODE will get returned in a
floating-point register. */
static bool
mips_return_mode_in_fpr_p (machine_mode mode)
{
gcc_assert (TARGET_PAIRED_SINGLE_FLOAT || mode != V2SFmode);
return ((GET_MODE_CLASS (mode) == MODE_FLOAT
|| mode == V2SFmode
|| GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT)
&& GET_MODE_UNIT_SIZE (mode) <= UNITS_PER_HWFPVALUE);
}
/* Return the representation of an FPR return register when the
value being returned in FP_RETURN has mode VALUE_MODE and the
return type itself has mode TYPE_MODE. On NewABI targets,
the two modes may be different for structures like:
struct __attribute__((packed)) foo { float f; }
where we return the SFmode value of "f" in FP_RETURN, but where
the structure itself has mode BLKmode. */
static rtx
mips_return_fpr_single (machine_mode type_mode,
machine_mode value_mode)
{
rtx x;
x = gen_rtx_REG (value_mode, FP_RETURN);
if (type_mode != value_mode)
{
x = gen_rtx_EXPR_LIST (VOIDmode, x, const0_rtx);
x = gen_rtx_PARALLEL (type_mode, gen_rtvec (1, x));
}
return x;
}
/* Return a composite value in a pair of floating-point registers.
MODE1 and OFFSET1 are the mode and byte offset for the first value,
likewise MODE2 and OFFSET2 for the second. MODE is the mode of the
complete value.
For n32 & n64, $f0 always holds the first value and $f2 the second.
Otherwise the values are packed together as closely as possible. */
static rtx
mips_return_fpr_pair (machine_mode mode,
machine_mode mode1, HOST_WIDE_INT offset1,
machine_mode mode2, HOST_WIDE_INT offset2)
{
int inc;
inc = (TARGET_NEWABI || mips_abi == ABI_32 ? 2 : MAX_FPRS_PER_FMT);
return gen_rtx_PARALLEL
(mode,
gen_rtvec (2,
gen_rtx_EXPR_LIST (VOIDmode,
gen_rtx_REG (mode1, FP_RETURN),
GEN_INT (offset1)),
gen_rtx_EXPR_LIST (VOIDmode,
gen_rtx_REG (mode2, FP_RETURN + inc),
GEN_INT (offset2))));
}
/* Implement TARGET_FUNCTION_VALUE and TARGET_LIBCALL_VALUE.
For normal calls, VALTYPE is the return type and MODE is VOIDmode.
For libcalls, VALTYPE is null and MODE is the mode of the return value. */
static rtx
mips_function_value_1 (const_tree valtype, const_tree fn_decl_or_type,
machine_mode mode)
{
if (valtype)
{
tree fields[2];
int unsigned_p;
const_tree func;
if (fn_decl_or_type && DECL_P (fn_decl_or_type))
func = fn_decl_or_type;
else
func = NULL;
mode = TYPE_MODE (valtype);
unsigned_p = TYPE_UNSIGNED (valtype);
/* Since TARGET_PROMOTE_FUNCTION_MODE unconditionally promotes,
return values, promote the mode here too. */
mode = promote_function_mode (valtype, mode, &unsigned_p, func, 1);
/* Handle structures whose fields are returned in $f0/$f2. */
switch (mips_fpr_return_fields (valtype, fields))
{
case 1:
return mips_return_fpr_single (mode,
TYPE_MODE (TREE_TYPE (fields[0])));
case 2:
return mips_return_fpr_pair (mode,
TYPE_MODE (TREE_TYPE (fields[0])),
int_byte_position (fields[0]),
TYPE_MODE (TREE_TYPE (fields[1])),
int_byte_position (fields[1]));
}
/* If a value is passed in the most significant part of a register, see
whether we have to round the mode up to a whole number of words. */
if (mips_return_in_msb (valtype))
{
HOST_WIDE_INT size = int_size_in_bytes (valtype);
if (size % UNITS_PER_WORD != 0)
{
size += UNITS_PER_WORD - size % UNITS_PER_WORD;
mode = int_mode_for_size (size * BITS_PER_UNIT, 0).require ();
}
}
/* For EABI, the class of return register depends entirely on MODE.
For example, "struct { some_type x; }" and "union { some_type x; }"
are returned in the same way as a bare "some_type" would be.
Other ABIs only use FPRs for scalar, complex or vector types. */
if (mips_abi != ABI_EABI && !FLOAT_TYPE_P (valtype))
return gen_rtx_REG (mode, GP_RETURN);
}
if (!TARGET_MIPS16)
{
/* Handle long doubles for n32 & n64. */
if (mode == TFmode)
return mips_return_fpr_pair (mode,
DImode, 0,
DImode, GET_MODE_SIZE (mode) / 2);
if (mips_return_mode_in_fpr_p (mode))
{
if (GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT)
return mips_return_fpr_pair (mode,
GET_MODE_INNER (mode), 0,
GET_MODE_INNER (mode),
GET_MODE_SIZE (mode) / 2);
else
return gen_rtx_REG (mode, FP_RETURN);
}
}
return gen_rtx_REG (mode, GP_RETURN);
}
/* Implement TARGET_FUNCTION_VALUE. */
static rtx
mips_function_value (const_tree valtype, const_tree fn_decl_or_type,
bool outgoing ATTRIBUTE_UNUSED)
{
return mips_function_value_1 (valtype, fn_decl_or_type, VOIDmode);
}
/* Implement TARGET_LIBCALL_VALUE. */
static rtx
mips_libcall_value (machine_mode mode, const_rtx fun ATTRIBUTE_UNUSED)
{
return mips_function_value_1 (NULL_TREE, NULL_TREE, mode);
}
/* Implement TARGET_FUNCTION_VALUE_REGNO_P.
On the MIPS, R2 R3 and F0 F2 are the only register thus used. */
static bool
mips_function_value_regno_p (const unsigned int regno)
{
/* Most types only require one GPR or one FPR for return values but for
hard-float two FPRs can be used for _Complex types (for all ABIs)
and long doubles (for n64). */
if (regno == GP_RETURN
|| regno == FP_RETURN
|| (FP_RETURN != GP_RETURN
&& regno == FP_RETURN + 2))
return true;
/* For o32 FP32, _Complex double will be returned in four 32-bit registers.
This does not apply to o32 FPXX as floating-point function argument and
return registers are described as 64-bit even though floating-point
registers are primarily described as 32-bit internally.
See: mips_get_reg_raw_mode. */
if ((mips_abi == ABI_32 && TARGET_FLOAT32)
&& FP_RETURN != GP_RETURN
&& (regno == FP_RETURN + 1
|| regno == FP_RETURN + 3))
return true;
return false;
}
/* Implement TARGET_RETURN_IN_MEMORY. Under the o32 and o64 ABIs,
all BLKmode objects are returned in memory. Under the n32, n64
and embedded ABIs, small structures are returned in a register.
Objects with varying size must still be returned in memory, of
course. */
static bool
mips_return_in_memory (const_tree type, const_tree fndecl ATTRIBUTE_UNUSED)
{
if (TARGET_OLDABI)
/* Ensure that any floating point vector types are returned via memory
even if they are supported through a vector mode with some ASEs. */
return (VECTOR_FLOAT_TYPE_P (type)
|| TYPE_MODE (type) == BLKmode);
return (!IN_RANGE (int_size_in_bytes (type), 0, 2 * UNITS_PER_WORD));
}
/* Implement TARGET_SETUP_INCOMING_VARARGS. */
static void
mips_setup_incoming_varargs (cumulative_args_t cum,
const function_arg_info &arg,
int *pretend_size ATTRIBUTE_UNUSED, int no_rtl)
{
CUMULATIVE_ARGS local_cum;
int gp_saved, fp_saved;
/* The caller has advanced CUM up to, but not beyond, the last named
argument. Advance a local copy of CUM past the last "real" named
argument, to find out how many registers are left over. */
local_cum = *get_cumulative_args (cum);
mips_function_arg_advance (pack_cumulative_args (&local_cum), arg);
/* Found out how many registers we need to save. */
gp_saved = MAX_ARGS_IN_REGISTERS - local_cum.num_gprs;
fp_saved = (EABI_FLOAT_VARARGS_P
? MAX_ARGS_IN_REGISTERS - local_cum.num_fprs
: 0);
if (!no_rtl)
{
if (gp_saved > 0)
{
rtx ptr, mem;
ptr = plus_constant (Pmode, virtual_incoming_args_rtx,
REG_PARM_STACK_SPACE (cfun->decl)
- gp_saved * UNITS_PER_WORD);
mem = gen_frame_mem (BLKmode, ptr);
set_mem_alias_set (mem, get_varargs_alias_set ());
move_block_from_reg (local_cum.num_gprs + GP_ARG_FIRST,
mem, gp_saved);
}
if (fp_saved > 0)
{
/* We can't use move_block_from_reg, because it will use
the wrong mode. */
machine_mode mode;
int off, i;
/* Set OFF to the offset from virtual_incoming_args_rtx of
the first float register. The FP save area lies below
the integer one, and is aligned to UNITS_PER_FPVALUE bytes. */
off = ROUND_DOWN (-gp_saved * UNITS_PER_WORD, UNITS_PER_FPVALUE);
off -= fp_saved * UNITS_PER_FPREG;
mode = TARGET_SINGLE_FLOAT ? SFmode : DFmode;
for (i = local_cum.num_fprs; i < MAX_ARGS_IN_REGISTERS;
i += MAX_FPRS_PER_FMT)
{
rtx ptr, mem;
ptr = plus_constant (Pmode, virtual_incoming_args_rtx, off);
mem = gen_frame_mem (mode, ptr);
set_mem_alias_set (mem, get_varargs_alias_set ());
mips_emit_move (mem, gen_rtx_REG (mode, FP_ARG_FIRST + i));
off += UNITS_PER_HWFPVALUE;
}
}
}
if (REG_PARM_STACK_SPACE (cfun->decl) == 0)
cfun->machine->varargs_size = (gp_saved * UNITS_PER_WORD
+ fp_saved * UNITS_PER_FPREG);
}
/* Implement TARGET_BUILTIN_VA_LIST. */
static tree
mips_build_builtin_va_list (void)
{
if (EABI_FLOAT_VARARGS_P)
{
/* We keep 3 pointers, and two offsets.
Two pointers are to the overflow area, which starts at the CFA.
One of these is constant, for addressing into the GPR save area
below it. The other is advanced up the stack through the
overflow region.
The third pointer is to the bottom of the GPR save area.
Since the FPR save area is just below it, we can address
FPR slots off this pointer.
We also keep two one-byte offsets, which are to be subtracted
from the constant pointers to yield addresses in the GPR and
FPR save areas. These are downcounted as float or non-float
arguments are used, and when they get to zero, the argument
must be obtained from the overflow region. */
tree f_ovfl, f_gtop, f_ftop, f_goff, f_foff, f_res, record;
tree array, index;
record = lang_hooks.types.make_type (RECORD_TYPE);
f_ovfl = build_decl (BUILTINS_LOCATION,
FIELD_DECL, get_identifier ("__overflow_argptr"),
ptr_type_node);
f_gtop = build_decl (BUILTINS_LOCATION,
FIELD_DECL, get_identifier ("__gpr_top"),
ptr_type_node);
f_ftop = build_decl (BUILTINS_LOCATION,
FIELD_DECL, get_identifier ("__fpr_top"),
ptr_type_node);
f_goff = build_decl (BUILTINS_LOCATION,
FIELD_DECL, get_identifier ("__gpr_offset"),
unsigned_char_type_node);
f_foff = build_decl (BUILTINS_LOCATION,
FIELD_DECL, get_identifier ("__fpr_offset"),
unsigned_char_type_node);
/* Explicitly pad to the size of a pointer, so that -Wpadded won't
warn on every user file. */
index = build_int_cst (NULL_TREE, GET_MODE_SIZE (ptr_mode) - 2 - 1);
array = build_array_type (unsigned_char_type_node,
build_index_type (index));
f_res = build_decl (BUILTINS_LOCATION,
FIELD_DECL, get_identifier ("__reserved"), array);
DECL_FIELD_CONTEXT (f_ovfl) = record;
DECL_FIELD_CONTEXT (f_gtop) = record;
DECL_FIELD_CONTEXT (f_ftop) = record;
DECL_FIELD_CONTEXT (f_goff) = record;
DECL_FIELD_CONTEXT (f_foff) = record;
DECL_FIELD_CONTEXT (f_res) = record;
TYPE_FIELDS (record) = f_ovfl;
DECL_CHAIN (f_ovfl) = f_gtop;
DECL_CHAIN (f_gtop) = f_ftop;
DECL_CHAIN (f_ftop) = f_goff;
DECL_CHAIN (f_goff) = f_foff;
DECL_CHAIN (f_foff) = f_res;
layout_type (record);
return record;
}
else
/* Otherwise, we use 'void *'. */
return ptr_type_node;
}
/* Implement TARGET_EXPAND_BUILTIN_VA_START. */
static void
mips_va_start (tree valist, rtx nextarg)
{
if (EABI_FLOAT_VARARGS_P)
{
const CUMULATIVE_ARGS *cum;
tree f_ovfl, f_gtop, f_ftop, f_goff, f_foff;
tree ovfl, gtop, ftop, goff, foff;
tree t;
int gpr_save_area_size;
int fpr_save_area_size;
int fpr_offset;
cum = &crtl->args.info;
gpr_save_area_size
= (MAX_ARGS_IN_REGISTERS - cum->num_gprs) * UNITS_PER_WORD;
fpr_save_area_size
= (MAX_ARGS_IN_REGISTERS - cum->num_fprs) * UNITS_PER_FPREG;
f_ovfl = TYPE_FIELDS (va_list_type_node);
f_gtop = DECL_CHAIN (f_ovfl);
f_ftop = DECL_CHAIN (f_gtop);
f_goff = DECL_CHAIN (f_ftop);
f_foff = DECL_CHAIN (f_goff);
ovfl = build3 (COMPONENT_REF, TREE_TYPE (f_ovfl), valist, f_ovfl,
NULL_TREE);
gtop = build3 (COMPONENT_REF, TREE_TYPE (f_gtop), valist, f_gtop,
NULL_TREE);
ftop = build3 (COMPONENT_REF, TREE_TYPE (f_ftop), valist, f_ftop,
NULL_TREE);
goff = build3 (COMPONENT_REF, TREE_TYPE (f_goff), valist, f_goff,
NULL_TREE);
foff = build3 (COMPONENT_REF, TREE_TYPE (f_foff), valist, f_foff,
NULL_TREE);
/* Emit code to initialize OVFL, which points to the next varargs
stack argument. CUM->STACK_WORDS gives the number of stack
words used by named arguments. */
t = make_tree (TREE_TYPE (ovfl), virtual_incoming_args_rtx);
if (cum->stack_words > 0)
t = fold_build_pointer_plus_hwi (t, cum->stack_words * UNITS_PER_WORD);
t = build2 (MODIFY_EXPR, TREE_TYPE (ovfl), ovfl, t);
expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
/* Emit code to initialize GTOP, the top of the GPR save area. */
t = make_tree (TREE_TYPE (gtop), virtual_incoming_args_rtx);
t = build2 (MODIFY_EXPR, TREE_TYPE (gtop), gtop, t);
expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
/* Emit code to initialize FTOP, the top of the FPR save area.
This address is gpr_save_area_bytes below GTOP, rounded
down to the next fp-aligned boundary. */
t = make_tree (TREE_TYPE (ftop), virtual_incoming_args_rtx);
fpr_offset = gpr_save_area_size + UNITS_PER_FPVALUE - 1;
fpr_offset &= -UNITS_PER_FPVALUE;
if (fpr_offset)
t = fold_build_pointer_plus_hwi (t, -fpr_offset);
t = build2 (MODIFY_EXPR, TREE_TYPE (ftop), ftop, t);
expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
/* Emit code to initialize GOFF, the offset from GTOP of the
next GPR argument. */
t = build2 (MODIFY_EXPR, TREE_TYPE (goff), goff,
build_int_cst (TREE_TYPE (goff), gpr_save_area_size));
expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
/* Likewise emit code to initialize FOFF, the offset from FTOP
of the next FPR argument. */
t = build2 (MODIFY_EXPR, TREE_TYPE (foff), foff,
build_int_cst (TREE_TYPE (foff), fpr_save_area_size));
expand_expr (t, const0_rtx, VOIDmode, EXPAND_NORMAL);
}
else
{
nextarg = plus_constant (Pmode, nextarg, -cfun->machine->varargs_size);
std_expand_builtin_va_start (valist, nextarg);
}
}
/* Like std_gimplify_va_arg_expr, but apply alignment to zero-sized
types as well. */
static tree
mips_std_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p,
gimple_seq *post_p)
{
tree addr, t, type_size, rounded_size, valist_tmp;
unsigned HOST_WIDE_INT align, boundary;
bool indirect;
indirect = pass_va_arg_by_reference (type);
if (indirect)
type = build_pointer_type (type);
align = PARM_BOUNDARY / BITS_PER_UNIT;
boundary = targetm.calls.function_arg_boundary (TYPE_MODE (type), type);
/* When we align parameter on stack for caller, if the parameter
alignment is beyond MAX_SUPPORTED_STACK_ALIGNMENT, it will be
aligned at MAX_SUPPORTED_STACK_ALIGNMENT. We will match callee
here with caller. */
if (boundary > MAX_SUPPORTED_STACK_ALIGNMENT)
boundary = MAX_SUPPORTED_STACK_ALIGNMENT;
boundary /= BITS_PER_UNIT;
/* Hoist the valist value into a temporary for the moment. */
valist_tmp = get_initialized_tmp_var (valist, pre_p, NULL);
/* va_list pointer is aligned to PARM_BOUNDARY. If argument actually
requires greater alignment, we must perform dynamic alignment. */
if (boundary > align)
{
t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp,
fold_build_pointer_plus_hwi (valist_tmp, boundary - 1));
gimplify_and_add (t, pre_p);
t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist_tmp,
fold_build2 (BIT_AND_EXPR, TREE_TYPE (valist),
valist_tmp,
build_int_cst (TREE_TYPE (valist), -boundary)));
gimplify_and_add (t, pre_p);
}
else
boundary = align;
/* If the actual alignment is less than the alignment of the type,
adjust the type accordingly so that we don't assume strict alignment
when dereferencing the pointer. */
boundary *= BITS_PER_UNIT;
if (boundary < TYPE_ALIGN (type))
{
type = build_variant_type_copy (type);
SET_TYPE_ALIGN (type, boundary);
}
/* Compute the rounded size of the type. */
type_size = size_in_bytes (type);
rounded_size = round_up (type_size, align);
/* Reduce rounded_size so it's sharable with the postqueue. */
gimplify_expr (&rounded_size, pre_p, post_p, is_gimple_val, fb_rvalue);
/* Get AP. */
addr = valist_tmp;
if (PAD_VARARGS_DOWN && !integer_zerop (rounded_size))
{
/* Small args are padded downward. */
t = fold_build2_loc (input_location, GT_EXPR, sizetype,
rounded_size, size_int (align));
t = fold_build3 (COND_EXPR, sizetype, t, size_zero_node,
size_binop (MINUS_EXPR, rounded_size, type_size));
addr = fold_build_pointer_plus (addr, t);
}
/* Compute new value for AP. */
t = fold_build_pointer_plus (valist_tmp, rounded_size);
t = build2 (MODIFY_EXPR, TREE_TYPE (valist), valist, t);
gimplify_and_add (t, pre_p);
addr = fold_convert (build_pointer_type (type), addr);
if (indirect)
addr = build_va_arg_indirect_ref (addr);
return build_va_arg_indirect_ref (addr);
}
/* Implement TARGET_GIMPLIFY_VA_ARG_EXPR. */
static tree
mips_gimplify_va_arg_expr (tree valist, tree type, gimple_seq *pre_p,
gimple_seq *post_p)
{
tree addr;
bool indirect_p;
indirect_p = pass_va_arg_by_reference (type);
if (indirect_p)
type = build_pointer_type (type);
if (!EABI_FLOAT_VARARGS_P)
addr = mips_std_gimplify_va_arg_expr (valist, type, pre_p, post_p);
else
{
tree f_ovfl, f_gtop, f_ftop, f_goff, f_foff;
tree ovfl, top, off, align;
HOST_WIDE_INT size, rsize, osize;
tree t, u;
f_ovfl = TYPE_FIELDS (va_list_type_node);
f_gtop = DECL_CHAIN (f_ovfl);
f_ftop = DECL_CHAIN (f_gtop);
f_goff = DECL_CHAIN (f_ftop);
f_foff = DECL_CHAIN (f_goff);
/* Let:
TOP be the top of the GPR or FPR save area;
OFF be the offset from TOP of the next register;
ADDR_RTX be the address of the argument;
SIZE be the number of bytes in the argument type;
RSIZE be the number of bytes used to store the argument
when it's in the register save area; and
OSIZE be the number of bytes used to store it when it's
in the stack overflow area.
The code we want is:
1: off &= -rsize; // round down
2: if (off != 0)
3: {
4: addr_rtx = top - off + (BYTES_BIG_ENDIAN ? RSIZE - SIZE : 0);
5: off -= rsize;
6: }
7: else
8: {
9: ovfl = ((intptr_t) ovfl + osize - 1) & -osize;
10: addr_rtx = ovfl + (BYTES_BIG_ENDIAN ? OSIZE - SIZE : 0);
11: ovfl += osize;
14: }
[1] and [9] can sometimes be optimized away. */
ovfl = build3 (COMPONENT_REF, TREE_TYPE (f_ovfl), valist, f_ovfl,
NULL_TREE);
size = int_size_in_bytes (type);
if (GET_MODE_CLASS (TYPE_MODE (type)) == MODE_FLOAT
&& GET_MODE_SIZE (TYPE_MODE (type)) <= UNITS_PER_FPVALUE)
{
top = build3 (COMPONENT_REF, TREE_TYPE (f_ftop),
unshare_expr (valist), f_ftop, NULL_TREE);
off = build3 (COMPONENT_REF, TREE_TYPE (f_foff),
unshare_expr (valist), f_foff, NULL_TREE);
/* When va_start saves FPR arguments to the stack, each slot
takes up UNITS_PER_HWFPVALUE bytes, regardless of the
argument's precision. */
rsize = UNITS_PER_HWFPVALUE;
/* Overflow arguments are padded to UNITS_PER_WORD bytes
(= PARM_BOUNDARY bits). This can be different from RSIZE
in two cases:
(1) On 32-bit targets when TYPE is a structure such as:
struct s { float f; };
Such structures are passed in paired FPRs, so RSIZE
will be 8 bytes. However, the structure only takes
up 4 bytes of memory, so OSIZE will only be 4.
(2) In combinations such as -mgp64 -msingle-float
-fshort-double. Doubles passed in registers will then take
up 4 (UNITS_PER_HWFPVALUE) bytes, but those passed on the
stack take up UNITS_PER_WORD bytes. */
osize = MAX (GET_MODE_SIZE (TYPE_MODE (type)), UNITS_PER_WORD);
}
else
{
top = build3 (COMPONENT_REF, TREE_TYPE (f_gtop),
unshare_expr (valist), f_gtop, NULL_TREE);
off = build3 (COMPONENT_REF, TREE_TYPE (f_goff),
unshare_expr (valist), f_goff, NULL_TREE);
rsize = ROUND_UP (size, UNITS_PER_WORD);
if (rsize > UNITS_PER_WORD)
{
/* [1] Emit code for: off &= -rsize. */
t = build2 (BIT_AND_EXPR, TREE_TYPE (off), unshare_expr (off),
build_int_cst (TREE_TYPE (off), -rsize));
gimplify_assign (unshare_expr (off), t, pre_p);
}
osize = rsize;
}
/* [2] Emit code to branch if off == 0. */
t = build2 (NE_EXPR, boolean_type_node, unshare_expr (off),
build_int_cst (TREE_TYPE (off), 0));
addr = build3 (COND_EXPR, ptr_type_node, t, NULL_TREE, NULL_TREE);
/* [5] Emit code for: off -= rsize. We do this as a form of
post-decrement not available to C. */
t = fold_convert (TREE_TYPE (off), build_int_cst (NULL_TREE, rsize));
t = build2 (POSTDECREMENT_EXPR, TREE_TYPE (off), off, t);
/* [4] Emit code for:
addr_rtx = top - off + (BYTES_BIG_ENDIAN ? RSIZE - SIZE : 0). */
t = fold_convert (sizetype, t);
t = fold_build1 (NEGATE_EXPR, sizetype, t);
t = fold_build_pointer_plus (top, t);
if (BYTES_BIG_ENDIAN && rsize > size)
t = fold_build_pointer_plus_hwi (t, rsize - size);
COND_EXPR_THEN (addr) = t;
if (osize > UNITS_PER_WORD)
{
/* [9] Emit: ovfl = ((intptr_t) ovfl + osize - 1) & -osize. */
t = fold_build_pointer_plus_hwi (unshare_expr (ovfl), osize - 1);
u = build_int_cst (TREE_TYPE (t), -osize);
t = build2 (BIT_AND_EXPR, TREE_TYPE (t), t, u);
align = build2 (MODIFY_EXPR, TREE_TYPE (ovfl),
unshare_expr (ovfl), t);
}
else
align = NULL;
/* [10, 11] Emit code for:
addr_rtx = ovfl + (BYTES_BIG_ENDIAN ? OSIZE - SIZE : 0)
ovfl += osize. */
u = fold_convert (TREE_TYPE (ovfl), build_int_cst (NULL_TREE, osize));
t = build2 (POSTINCREMENT_EXPR, TREE_TYPE (ovfl), ovfl, u);
if (BYTES_BIG_ENDIAN && osize > size)
t = fold_build_pointer_plus_hwi (t, osize - size);
/* String [9] and [10, 11] together. */
if (align)
t = build2 (COMPOUND_EXPR, TREE_TYPE (t), align, t);
COND_EXPR_ELSE (addr) = t;
addr = fold_convert (build_pointer_type (type), addr);
addr = build_va_arg_indirect_ref (addr);
}
if (indirect_p)
addr = build_va_arg_indirect_ref (addr);
return addr;
}
/* Declare a unique, locally-binding function called NAME, then start
its definition. */
static void
mips_start_unique_function (const char *name)
{
tree decl;
decl = build_decl (BUILTINS_LOCATION, FUNCTION_DECL,
get_identifier (name),
build_function_type_list (void_type_node, NULL_TREE));
DECL_RESULT (decl) = build_decl (BUILTINS_LOCATION, RESULT_DECL,
NULL_TREE, void_type_node);
TREE_PUBLIC (decl) = 1;
TREE_STATIC (decl) = 1;
cgraph_node::create (decl)->set_comdat_group (DECL_ASSEMBLER_NAME (decl));
targetm.asm_out.unique_section (decl, 0);
switch_to_section (get_named_section (decl, NULL, 0));
targetm.asm_out.globalize_label (asm_out_file, name);
fputs ("\t.hidden\t", asm_out_file);
assemble_name (asm_out_file, name);
putc ('\n', asm_out_file);
}
/* Start a definition of function NAME. MIPS16_P indicates whether the
function contains MIPS16 code. */
static void
mips_start_function_definition (const char *name, bool mips16_p)
{
if (mips16_p)
fprintf (asm_out_file, "\t.set\tmips16\n");
else
fprintf (asm_out_file, "\t.set\tnomips16\n");
if (TARGET_MICROMIPS)
fprintf (asm_out_file, "\t.set\tmicromips\n");
#ifdef HAVE_GAS_MICROMIPS
else
fprintf (asm_out_file, "\t.set\tnomicromips\n");
#endif
if (!flag_inhibit_size_directive)
{
fputs ("\t.ent\t", asm_out_file);
assemble_name (asm_out_file, name);
fputs ("\n", asm_out_file);
}
ASM_OUTPUT_TYPE_DIRECTIVE (asm_out_file, name, "function");
/* Start the definition proper. */
assemble_name (asm_out_file, name);
fputs (":\n", asm_out_file);
}
/* End a function definition started by mips_start_function_definition. */
static void
mips_end_function_definition (const char *name)
{
if (!flag_inhibit_size_directive)
{
fputs ("\t.end\t", asm_out_file);
assemble_name (asm_out_file, name);
fputs ("\n", asm_out_file);
}
}
/* If *STUB_PTR points to a stub, output a comdat-style definition for it,
then free *STUB_PTR. */
static void
mips_finish_stub (mips_one_only_stub **stub_ptr)
{
mips_one_only_stub *stub = *stub_ptr;
if (!stub)
return;
const char *name = stub->get_name ();
mips_start_unique_function (name);
mips_start_function_definition (name, false);
stub->output_body ();
mips_end_function_definition (name);
delete stub;
*stub_ptr = 0;
}
/* Return true if calls to X can use R_MIPS_CALL* relocations. */
static bool
mips_ok_for_lazy_binding_p (rtx x)
{
return (TARGET_USE_GOT
&& GET_CODE (x) == SYMBOL_REF
&& !SYMBOL_REF_BIND_NOW_P (x)
&& !mips_symbol_binds_local_p (x));
}
/* Load function address ADDR into register DEST. TYPE is as for
mips_expand_call. Return true if we used an explicit lazy-binding
sequence. */
static bool
mips_load_call_address (enum mips_call_type type, rtx dest, rtx addr)
{
/* If we're generating PIC, and this call is to a global function,
try to allow its address to be resolved lazily. This isn't
possible for sibcalls when $gp is call-saved because the value
of $gp on entry to the stub would be our caller's gp, not ours. */
if (TARGET_EXPLICIT_RELOCS
&& !(type == MIPS_CALL_SIBCALL && TARGET_CALL_SAVED_GP)
&& mips_ok_for_lazy_binding_p (addr))
{
addr = mips_got_load (dest, addr, SYMBOL_GOTOFF_CALL);
emit_insn (gen_rtx_SET (dest, addr));
return true;
}
else
{
mips_emit_move (dest, addr);
return false;
}
}
/* Each locally-defined hard-float MIPS16 function has a local symbol
associated with it. This hash table maps the function symbol (FUNC)
to the local symbol (LOCAL). */
static GTY (()) hash_map<nofree_string_hash, rtx> *mips16_local_aliases;
/* FUNC is the symbol for a locally-defined hard-float MIPS16 function.
Return a local alias for it, creating a new one if necessary. */
static rtx
mips16_local_alias (rtx func)
{
/* Create the hash table if this is the first call. */
if (mips16_local_aliases == NULL)
mips16_local_aliases = hash_map<nofree_string_hash, rtx>::create_ggc (37);
/* Look up the function symbol, creating a new entry if need be. */
bool existed;
const char *func_name = XSTR (func, 0);
rtx *slot = &mips16_local_aliases->get_or_insert (func_name, &existed);
gcc_assert (slot != NULL);
if (!existed)
{
rtx local;
/* Create a new SYMBOL_REF for the local symbol. The choice of
__fn_local_* is based on the __fn_stub_* names that we've
traditionally used for the non-MIPS16 stub. */
func_name = targetm.strip_name_encoding (XSTR (func, 0));
const char *local_name = ACONCAT (("__fn_local_", func_name, NULL));
local = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (local_name));
SYMBOL_REF_FLAGS (local) = SYMBOL_REF_FLAGS (func) | SYMBOL_FLAG_LOCAL;
/* Create a new structure to represent the mapping. */
*slot = local;
}
return *slot;
}
/* A chained list of functions for which mips16_build_call_stub has already
generated a stub. NAME is the name of the function and FP_RET_P is true
if the function returns a value in floating-point registers. */
struct mips16_stub {
struct mips16_stub *next;
char *name;
bool fp_ret_p;
};
static struct mips16_stub *mips16_stubs;
/* Return the two-character string that identifies floating-point
return mode MODE in the name of a MIPS16 function stub. */
static const char *
mips16_call_stub_mode_suffix (machine_mode mode)
{
if (mode == SFmode)
return "sf";
else if (mode == DFmode)
return "df";
else if (mode == SCmode)
return "sc";
else if (mode == DCmode)
return "dc";
else if (mode == V2SFmode)
{
gcc_assert (TARGET_PAIRED_SINGLE_FLOAT);
return "df";
}
else
gcc_unreachable ();
}
/* Write instructions to move a 32-bit value between general register
GPREG and floating-point register FPREG. DIRECTION is 't' to move
from GPREG to FPREG and 'f' to move in the opposite direction. */
static void
mips_output_32bit_xfer (char direction, unsigned int gpreg, unsigned int fpreg)
{
fprintf (asm_out_file, "\tm%cc1\t%s,%s\n", direction,
reg_names[gpreg], reg_names[fpreg]);
}
/* Likewise for 64-bit values. */
static void
mips_output_64bit_xfer (char direction, unsigned int gpreg, unsigned int fpreg)
{
if (TARGET_64BIT)
fprintf (asm_out_file, "\tdm%cc1\t%s,%s\n", direction,
reg_names[gpreg], reg_names[fpreg]);
else if (ISA_HAS_MXHC1)
{
fprintf (asm_out_file, "\tm%cc1\t%s,%s\n", direction,
reg_names[gpreg + TARGET_BIG_ENDIAN], reg_names[fpreg]);
fprintf (asm_out_file, "\tm%chc1\t%s,%s\n", direction,
reg_names[gpreg + TARGET_LITTLE_ENDIAN], reg_names[fpreg]);
}
else if (TARGET_FLOATXX && direction == 't')
{
/* Use the argument save area to move via memory. */
fprintf (asm_out_file, "\tsw\t%s,0($sp)\n", reg_names[gpreg]);
fprintf (asm_out_file, "\tsw\t%s,4($sp)\n", reg_names[gpreg + 1]);
fprintf (asm_out_file, "\tldc1\t%s,0($sp)\n", reg_names[fpreg]);
}
else if (TARGET_FLOATXX && direction == 'f')
{
/* Use the argument save area to move via memory. */
fprintf (asm_out_file, "\tsdc1\t%s,0($sp)\n", reg_names[fpreg]);
fprintf (asm_out_file, "\tlw\t%s,0($sp)\n", reg_names[gpreg]);
fprintf (asm_out_file, "\tlw\t%s,4($sp)\n", reg_names[gpreg + 1]);
}
else
{
/* Move the least-significant word. */
fprintf (asm_out_file, "\tm%cc1\t%s,%s\n", direction,
reg_names[gpreg + TARGET_BIG_ENDIAN], reg_names[fpreg]);
/* ...then the most significant word. */
fprintf (asm_out_file, "\tm%cc1\t%s,%s\n", direction,
reg_names[gpreg + TARGET_LITTLE_ENDIAN], reg_names[fpreg + 1]);
}
}
/* Write out code to move floating-point arguments into or out of
general registers. FP_CODE is the code describing which arguments
are present (see the comment above the definition of CUMULATIVE_ARGS
in mips.h). DIRECTION is as for mips_output_32bit_xfer. */
static void
mips_output_args_xfer (int fp_code, char direction)
{
unsigned int gparg, fparg, f;
CUMULATIVE_ARGS cum;
/* This code only works for o32 and o64. */
gcc_assert (TARGET_OLDABI);
mips_init_cumulative_args (&cum, NULL);
for (f = (unsigned int) fp_code; f != 0; f >>= 2)
{
machine_mode mode;
struct mips_arg_info info;
if ((f & 3) == 1)
mode = SFmode;
else if ((f & 3) == 2)
mode = DFmode;
else
gcc_unreachable ();
mips_get_arg_info (&info, &cum, mode, NULL, true);
gparg = mips_arg_regno (&info, false);
fparg = mips_arg_regno (&info, true);
if (mode == SFmode)
mips_output_32bit_xfer (direction, gparg, fparg);
else
mips_output_64bit_xfer (direction, gparg, fparg);
function_arg_info arg (mode, /*named=*/true);
mips_function_arg_advance (pack_cumulative_args (&cum), arg);
}
}
/* Write a MIPS16 stub for the current function. This stub is used
for functions which take arguments in the floating-point registers.
It is normal-mode code that moves the floating-point arguments
into the general registers and then jumps to the MIPS16 code. */
static void
mips16_build_function_stub (void)
{
const char *fnname, *alias_name, *separator;
char *secname, *stubname;
tree stubdecl;
unsigned int f;
rtx symbol, alias;
/* Create the name of the stub, and its unique section. */
symbol = XEXP (DECL_RTL (current_function_decl), 0);
alias = mips16_local_alias (symbol);
fnname = targetm.strip_name_encoding (XSTR (symbol, 0));
alias_name = targetm.strip_name_encoding (XSTR (alias, 0));
secname = ACONCAT ((".mips16.fn.", fnname, NULL));
stubname = ACONCAT (("__fn_stub_", fnname, NULL));
/* Build a decl for the stub. */
stubdecl = build_decl (BUILTINS_LOCATION,
FUNCTION_DECL, get_identifier (stubname),
build_function_type_list (void_type_node, NULL_TREE));
set_decl_section_name (stubdecl, secname);
DECL_RESULT (stubdecl) = build_decl (BUILTINS_LOCATION,
RESULT_DECL, NULL_TREE, void_type_node);
/* Output a comment. */
fprintf (asm_out_file, "\t# Stub function for %s (",
current_function_name ());
separator = "";
for (f = (unsigned int) crtl->args.info.fp_code; f != 0; f >>= 2)
{
fprintf (asm_out_file, "%s%s", separator,
(f & 3) == 1 ? "float" : "double");
separator = ", ";
}
fprintf (asm_out_file, ")\n");
/* Start the function definition. */
assemble_start_function (stubdecl, stubname);
mips_start_function_definition (stubname, false);
/* If generating pic2 code, either set up the global pointer or
switch to pic0. */
if (TARGET_ABICALLS_PIC2)
{
if (TARGET_ABSOLUTE_ABICALLS)
fprintf (asm_out_file, "\t.option\tpic0\n");
else
{
output_asm_insn ("%(.cpload\t%^%)", NULL);
/* Emit an R_MIPS_NONE relocation to tell the linker what the
target function is. Use a local GOT access when loading the
symbol, to cut down on the number of unnecessary GOT entries
for stubs that aren't needed. */
output_asm_insn (".reloc\t0,R_MIPS_NONE,%0", &symbol);
symbol = alias;
}
}
/* Load the address of the MIPS16 function into $25. Do this first so
that targets with coprocessor interlocks can use an MFC1 to fill the
delay slot. */
output_asm_insn ("la\t%^,%0", &symbol);
/* Move the arguments from floating-point registers to general registers. */
mips_output_args_xfer (crtl->args.info.fp_code, 'f');
/* Jump to the MIPS16 function. */
output_asm_insn ("jr\t%^", NULL);
if (TARGET_ABICALLS_PIC2 && TARGET_ABSOLUTE_ABICALLS)
fprintf (asm_out_file, "\t.option\tpic2\n");
mips_end_function_definition (stubname);
/* If the linker needs to create a dynamic symbol for the target
function, it will associate the symbol with the stub (which,
unlike the target function, follows the proper calling conventions).
It is therefore useful to have a local alias for the target function,
so that it can still be identified as MIPS16 code. As an optimization,
this symbol can also be used for indirect MIPS16 references from
within this file. */
ASM_OUTPUT_DEF (asm_out_file, alias_name, fnname);
switch_to_section (function_section (current_function_decl));
}
/* The current function is a MIPS16 function that returns a value in an FPR.
Copy the return value from its soft-float to its hard-float location.
libgcc2 has special non-MIPS16 helper functions for each case. */
static void
mips16_copy_fpr_return_value (void)
{
rtx fn, insn, retval;
tree return_type;
machine_mode return_mode;
const char *name;
return_type = DECL_RESULT (current_function_decl);
return_mode = DECL_MODE (return_type);
name = ACONCAT (("__mips16_ret_",
mips16_call_stub_mode_suffix (return_mode),
NULL));
fn = mips16_stub_function (name);
/* The function takes arguments in $2 (and possibly $3), so calls
to it cannot be lazily bound. */
SYMBOL_REF_FLAGS (fn) |= SYMBOL_FLAG_BIND_NOW;
/* Model the call as something that takes the GPR return value as
argument and returns an "updated" value. */
retval = gen_rtx_REG (return_mode, GP_RETURN);
insn = mips_expand_call (MIPS_CALL_EPILOGUE, retval, fn,
const0_rtx, NULL_RTX, false);
use_reg (&CALL_INSN_FUNCTION_USAGE (insn), retval);
}
/* Consider building a stub for a MIPS16 call to function *FN_PTR.
RETVAL is the location of the return value, or null if this is
a "call" rather than a "call_value". ARGS_SIZE is the size of the
arguments and FP_CODE is the code built by mips_function_arg;
see the comment before the fp_code field in CUMULATIVE_ARGS for details.
There are three alternatives:
- If a stub was needed, emit the call and return the call insn itself.
- If we can avoid using a stub by redirecting the call, set *FN_PTR
to the new target and return null.
- If *FN_PTR doesn't need a stub, return null and leave *FN_PTR
unmodified.
A stub is needed for calls to functions that, in normal mode,
receive arguments in FPRs or return values in FPRs. The stub
copies the arguments from their soft-float positions to their
hard-float positions, calls the real function, then copies the
return value from its hard-float position to its soft-float
position.
We can emit a JAL to *FN_PTR even when *FN_PTR might need a stub.
If *FN_PTR turns out to be to a non-MIPS16 function, the linker
automatically redirects the JAL to the stub, otherwise the JAL
continues to call FN directly. */
static rtx_insn *
mips16_build_call_stub (rtx retval, rtx *fn_ptr, rtx args_size, int fp_code)
{
const char *fnname;
bool fp_ret_p;
struct mips16_stub *l;
rtx_insn *insn;
rtx pattern, fn;
/* We don't need to do anything if we aren't in MIPS16 mode, or if
we were invoked with the -msoft-float option. */
if (!TARGET_MIPS16 || TARGET_SOFT_FLOAT_ABI)
return NULL;
/* Figure out whether the value might come back in a floating-point
register. */
fp_ret_p = retval && mips_return_mode_in_fpr_p (GET_MODE (retval));
/* We don't need to do anything if there were no floating-point
arguments and the value will not be returned in a floating-point
register. */
if (fp_code == 0 && !fp_ret_p)
return NULL;
/* We don't need to do anything if this is a call to a special
MIPS16 support function. */
fn = *fn_ptr;
if (mips16_stub_function_p (fn))
return NULL;
/* If we're calling a locally-defined MIPS16 function, we know that
it will return values in both the "soft-float" and "hard-float"
registers. There is no need to use a stub to move the latter
to the former. */
if (fp_code == 0 && mips16_local_function_p (fn))
return NULL;
/* This code will only work for o32 and o64 abis. The other ABI's
require more sophisticated support. */
gcc_assert (TARGET_OLDABI);
/* If we're calling via a function pointer, use one of the magic
libgcc.a stubs provided for each (FP_CODE, FP_RET_P) combination.
Each stub expects the function address to arrive in register $2. */
if (GET_CODE (fn) != SYMBOL_REF
|| !call_insn_operand (fn, VOIDmode))
{
char buf[32];
rtx stub_fn, addr;
rtx_insn *insn;
bool lazy_p;
/* If this is a locally-defined and locally-binding function,
avoid the stub by calling the local alias directly. */
if (mips16_local_function_p (fn))
{
*fn_ptr = mips16_local_alias (fn);
return NULL;
}
/* Create a SYMBOL_REF for the libgcc.a function. */
if (fp_ret_p)
sprintf (buf, "__mips16_call_stub_%s_%d",
mips16_call_stub_mode_suffix (GET_MODE (retval)),
fp_code);
else
sprintf (buf, "__mips16_call_stub_%d", fp_code);
stub_fn = mips16_stub_function (buf);
/* The function uses $2 as an argument, so calls to it
cannot be lazily bound. */
SYMBOL_REF_FLAGS (stub_fn) |= SYMBOL_FLAG_BIND_NOW;
/* Load the target function into $2. */
addr = gen_rtx_REG (Pmode, GP_REG_FIRST + 2);
lazy_p = mips_load_call_address (MIPS_CALL_NORMAL, addr, fn);
/* Emit the call. */
insn = mips_expand_call (MIPS_CALL_NORMAL, retval, stub_fn,
args_size, NULL_RTX, lazy_p);
/* Tell GCC that this call does indeed use the value of $2. */
use_reg (&CALL_INSN_FUNCTION_USAGE (insn), addr);
/* If we are handling a floating-point return value, we need to
save $18 in the function prologue. Putting a note on the
call will mean that df_regs_ever_live_p ($18) will be true if the
call is not eliminated, and we can check that in the prologue
code. */
if (fp_ret_p)
CALL_INSN_FUNCTION_USAGE (insn) =
gen_rtx_EXPR_LIST (VOIDmode,
gen_rtx_CLOBBER (VOIDmode,
gen_rtx_REG (word_mode, 18)),
CALL_INSN_FUNCTION_USAGE (insn));
return insn;
}
/* We know the function we are going to call. If we have already
built a stub, we don't need to do anything further. */
fnname = targetm.strip_name_encoding (XSTR (fn, 0));
for (l = mips16_stubs; l != NULL; l = l->next)
if (strcmp (l->name, fnname) == 0)
break;
if (l == NULL)
{
const char *separator;
char *secname, *stubname;
tree stubid, stubdecl;
unsigned int f;
/* If the function does not return in FPRs, the special stub
section is named
.mips16.call.FNNAME
If the function does return in FPRs, the stub section is named
.mips16.call.fp.FNNAME
Build a decl for the stub. */
secname = ACONCAT ((".mips16.call.", fp_ret_p ? "fp." : "",
fnname, NULL));
stubname = ACONCAT (("__call_stub_", fp_ret_p ? "fp_" : "",
fnname, NULL));
stubid = get_identifier (stubname);
stubdecl = build_decl (BUILTINS_LOCATION,
FUNCTION_DECL, stubid,
build_function_type_list (void_type_node,
NULL_TREE));
set_decl_section_name (stubdecl, secname);
DECL_RESULT (stubdecl) = build_decl (BUILTINS_LOCATION,
RESULT_DECL, NULL_TREE,
void_type_node);
/* Output a comment. */
fprintf (asm_out_file, "\t# Stub function to call %s%s (",
(fp_ret_p
? (GET_MODE (retval) == SFmode ? "float " : "double ")
: ""),
fnname);
separator = "";
for (f = (unsigned int) fp_code; f != 0; f >>= 2)
{
fprintf (asm_out_file, "%s%s", separator,
(f & 3) == 1 ? "float" : "double");
separator = ", ";
}
fprintf (asm_out_file, ")\n");
/* Start the function definition. */
assemble_start_function (stubdecl, stubname);
mips_start_function_definition (stubname, false);
if (fp_ret_p)
{
fprintf (asm_out_file, "\t.cfi_startproc\n");
/* Create a fake CFA 4 bytes below the stack pointer.
This works around unwinders (like libgcc's) that expect
the CFA for non-signal frames to be unique. */
fprintf (asm_out_file, "\t.cfi_def_cfa 29,-4\n");
/* "Save" $sp in itself so we don't use the fake CFA.
This is: DW_CFA_val_expression r29, { DW_OP_reg29 }. */
fprintf (asm_out_file, "\t.cfi_escape 0x16,29,1,0x6d\n");
/* Save the return address in $18. The stub's caller knows
that $18 might be clobbered, even though $18 is usually
a call-saved register.
Do it early on in case the last move to a floating-point
register can be scheduled into the delay slot of the
call we are about to make. */
fprintf (asm_out_file, "\tmove\t%s,%s\n",
reg_names[GP_REG_FIRST + 18],
reg_names[RETURN_ADDR_REGNUM]);
}
else
{
/* Load the address of the MIPS16 function into $25. Do this
first so that targets with coprocessor interlocks can use
an MFC1 to fill the delay slot. */
if (TARGET_EXPLICIT_RELOCS)
{
output_asm_insn ("lui\t%^,%%hi(%0)", &fn);
output_asm_insn ("addiu\t%^,%^,%%lo(%0)", &fn);
}
else
output_asm_insn ("la\t%^,%0", &fn);
}
/* Move the arguments from general registers to floating-point
registers. */
mips_output_args_xfer (fp_code, 't');
if (fp_ret_p)
{
/* Now call the non-MIPS16 function. */
output_asm_insn (mips_output_jump (&fn, 0, -1, true), &fn);
fprintf (asm_out_file, "\t.cfi_register 31,18\n");
/* Move the result from floating-point registers to
general registers. */
switch (GET_MODE (retval))
{
case E_SCmode:
mips_output_32bit_xfer ('f', GP_RETURN + TARGET_BIG_ENDIAN,
TARGET_BIG_ENDIAN
? FP_REG_FIRST + 2
: FP_REG_FIRST);
mips_output_32bit_xfer ('f', GP_RETURN + TARGET_LITTLE_ENDIAN,
TARGET_LITTLE_ENDIAN
? FP_REG_FIRST + 2
: FP_REG_FIRST);
if (GET_MODE (retval) == SCmode && TARGET_64BIT)
{
/* On 64-bit targets, complex floats are returned in
a single GPR, such that "sd" on a suitably-aligned
target would store the value correctly. */
fprintf (asm_out_file, "\tdsll\t%s,%s,32\n",
reg_names[GP_RETURN + TARGET_BIG_ENDIAN],
reg_names[GP_RETURN + TARGET_BIG_ENDIAN]);
fprintf (asm_out_file, "\tdsll\t%s,%s,32\n",
reg_names[GP_RETURN + TARGET_LITTLE_ENDIAN],
reg_names[GP_RETURN + TARGET_LITTLE_ENDIAN]);
fprintf (asm_out_file, "\tdsrl\t%s,%s,32\n",
reg_names[GP_RETURN + TARGET_BIG_ENDIAN],
reg_names[GP_RETURN + TARGET_BIG_ENDIAN]);
fprintf (asm_out_file, "\tor\t%s,%s,%s\n",
reg_names[GP_RETURN],
reg_names[GP_RETURN],
reg_names[GP_RETURN + 1]);
}
break;
case E_SFmode:
mips_output_32bit_xfer ('f', GP_RETURN, FP_REG_FIRST);
break;
case E_DCmode:
mips_output_64bit_xfer ('f', GP_RETURN + (8 / UNITS_PER_WORD),
FP_REG_FIRST + 2);
/* FALLTHRU */
case E_DFmode:
case E_V2SFmode:
gcc_assert (TARGET_PAIRED_SINGLE_FLOAT
|| GET_MODE (retval) != V2SFmode);
mips_output_64bit_xfer ('f', GP_RETURN, FP_REG_FIRST);
break;
default:
gcc_unreachable ();
}
fprintf (asm_out_file, "\tjr\t%s\n", reg_names[GP_REG_FIRST + 18]);
fprintf (asm_out_file, "\t.cfi_endproc\n");
}
else
{
/* Jump to the previously-loaded address. */
output_asm_insn ("jr\t%^", NULL);
}
#ifdef ASM_DECLARE_FUNCTION_SIZE
ASM_DECLARE_FUNCTION_SIZE (asm_out_file, stubname, stubdecl);
#endif
mips_end_function_definition (stubname);
/* Record this stub. */
l = XNEW (struct mips16_stub);
l->name = xstrdup (fnname);
l->fp_ret_p = fp_ret_p;
l->next = mips16_stubs;
mips16_stubs = l;
}
/* If we expect a floating-point return value, but we've built a
stub which does not expect one, then we're in trouble. We can't
use the existing stub, because it won't handle the floating-point
value. We can't build a new stub, because the linker won't know
which stub to use for the various calls in this object file.
Fortunately, this case is illegal, since it means that a function
was declared in two different ways in a single compilation. */
if (fp_ret_p && !l->fp_ret_p)
error ("cannot handle inconsistent calls to %qs", fnname);
if (retval == NULL_RTX)
pattern = gen_call_internal_direct (fn, args_size);
else
pattern = gen_call_value_internal_direct (retval, fn, args_size);
insn = mips_emit_call_insn (pattern, fn, fn, false);
/* If we are calling a stub which handles a floating-point return
value, we need to arrange to save $18 in the prologue. We do this
by marking the function call as using the register. The prologue
will later see that it is used, and emit code to save it. */
if (fp_ret_p)
CALL_INSN_FUNCTION_USAGE (insn) =
gen_rtx_EXPR_LIST (VOIDmode,
gen_rtx_CLOBBER (VOIDmode,
gen_rtx_REG (word_mode, 18)),
CALL_INSN_FUNCTION_USAGE (insn));
return insn;
}
/* Expand a call of type TYPE. RESULT is where the result will go (null
for "call"s and "sibcall"s), ADDR is the address of the function,
ARGS_SIZE is the size of the arguments and AUX is the value passed
to us by mips_function_arg. LAZY_P is true if this call already
involves a lazily-bound function address (such as when calling
functions through a MIPS16 hard-float stub).
Return the call itself. */
rtx_insn *
mips_expand_call (enum mips_call_type type, rtx result, rtx addr,
rtx args_size, rtx aux, bool lazy_p)
{
rtx orig_addr, pattern;
rtx_insn *insn;
int fp_code;
fp_code = aux == 0 ? 0 : (int) GET_MODE (aux);
insn = mips16_build_call_stub (result, &addr, args_size, fp_code);
if (insn)
{
gcc_assert (!lazy_p && type == MIPS_CALL_NORMAL);
return insn;
}
orig_addr = addr;
if (!call_insn_operand (addr, VOIDmode))
{
if (type == MIPS_CALL_EPILOGUE)
addr = MIPS_EPILOGUE_TEMP (Pmode);
else
addr = gen_reg_rtx (Pmode);
lazy_p |= mips_load_call_address (type, addr, orig_addr);
}
if (result == 0)
{
rtx (*fn) (rtx, rtx);
if (type == MIPS_CALL_SIBCALL)
fn = gen_sibcall_internal;
else
fn = gen_call_internal;
pattern = fn (addr, args_size);
}
else if (GET_CODE (result) == PARALLEL && XVECLEN (result, 0) == 2)
{
/* Handle return values created by mips_return_fpr_pair. */
rtx (*fn) (rtx, rtx, rtx, rtx);
rtx reg1, reg2;
if (type == MIPS_CALL_SIBCALL)
fn = gen_sibcall_value_multiple_internal;
else
fn = gen_call_value_multiple_internal;
reg1 = XEXP (XVECEXP (result, 0, 0), 0);
reg2 = XEXP (XVECEXP (result, 0, 1), 0);
pattern = fn (reg1, addr, args_size, reg2);
}
else
{
rtx (*fn) (rtx, rtx, rtx);
if (type == MIPS_CALL_SIBCALL)
fn = gen_sibcall_value_internal;
else
fn = gen_call_value_internal;
/* Handle return values created by mips_return_fpr_single. */
if (GET_CODE (result) == PARALLEL && XVECLEN (result, 0) == 1)
result = XEXP (XVECEXP (result, 0, 0), 0);
pattern = fn (result, addr, args_size);
}
return mips_emit_call_insn (pattern, orig_addr, addr, lazy_p);
}
/* Split call instruction INSN into a $gp-clobbering call and
(where necessary) an instruction to restore $gp from its save slot.
CALL_PATTERN is the pattern of the new call. */
void
mips_split_call (rtx insn, rtx call_pattern)
{
emit_call_insn (call_pattern);
if (!find_reg_note (insn, REG_NORETURN, 0))
mips_restore_gp_from_cprestore_slot (gen_rtx_REG (Pmode,
POST_CALL_TMP_REG));
}
/* Return true if a call to DECL may need to use JALX. */
static bool
mips_call_may_need_jalx_p (tree decl)
{
/* If the current translation unit would use a different mode for DECL,
assume that the call needs JALX. */
if (mips_get_compress_mode (decl) != TARGET_COMPRESSION)
return true;
/* mips_get_compress_mode is always accurate for locally-binding
functions in the current translation unit. */
if (!DECL_EXTERNAL (decl) && targetm.binds_local_p (decl))
return false;
/* When -minterlink-compressed is in effect, assume that functions
could use a different encoding mode unless an attribute explicitly
tells us otherwise. */
if (TARGET_INTERLINK_COMPRESSED)
{
if (!TARGET_COMPRESSION
&& mips_get_compress_off_flags (DECL_ATTRIBUTES (decl)) ==0)
return true;
if (TARGET_COMPRESSION
&& mips_get_compress_on_flags (DECL_ATTRIBUTES (decl)) == 0)
return true;
}
return false;
}
/* Implement TARGET_FUNCTION_OK_FOR_SIBCALL. */
static bool
mips_function_ok_for_sibcall (tree decl, tree exp ATTRIBUTE_UNUSED)
{
if (!TARGET_SIBCALLS)
return false;
/* Interrupt handlers need special epilogue code and therefore can't
use sibcalls. */
if (mips_interrupt_type_p (TREE_TYPE (current_function_decl)))
return false;
/* Direct Js are only possible to functions that use the same ISA encoding.
There is no JX counterpoart of JALX. */
if (decl
&& const_call_insn_operand (XEXP (DECL_RTL (decl), 0), VOIDmode)
&& mips_call_may_need_jalx_p (decl))
return false;
/* Sibling calls should not prevent lazy binding. Lazy-binding stubs
require $gp to be valid on entry, so sibcalls can only use stubs
if $gp is call-clobbered. */
if (decl
&& TARGET_CALL_SAVED_GP
&& !TARGET_ABICALLS_PIC0
&& !targetm.binds_local_p (decl))
return false;
/* Otherwise OK. */
return true;
}
/* Implement TARGET_USE_MOVE_BY_PIECES_INFRASTRUCTURE_P. */
bool
mips_use_by_pieces_infrastructure_p (unsigned HOST_WIDE_INT size,
unsigned int align,
enum by_pieces_operation op,
bool speed_p)
{
if (op == STORE_BY_PIECES)
return mips_store_by_pieces_p (size, align);
if (op == MOVE_BY_PIECES && HAVE_cpymemsi)
{
/* cpymemsi is meant to generate code that is at least as good as
move_by_pieces. However, cpymemsi effectively uses a by-pieces
implementation both for moves smaller than a word and for
word-aligned moves of no more than MIPS_MAX_MOVE_BYTES_STRAIGHT
bytes. We should allow the tree-level optimisers to do such
moves by pieces, as it often exposes other optimization
opportunities. We might as well continue to use cpymemsi at
the rtl level though, as it produces better code when
scheduling is disabled (such as at -O). */
if (currently_expanding_to_rtl)
return false;
if (align < BITS_PER_WORD)
return size < UNITS_PER_WORD;
return size <= MIPS_MAX_MOVE_BYTES_STRAIGHT;
}
return default_use_by_pieces_infrastructure_p (size, align, op, speed_p);
}
/* Implement a handler for STORE_BY_PIECES operations
for TARGET_USE_MOVE_BY_PIECES_INFRASTRUCTURE_P. */
bool
mips_store_by_pieces_p (unsigned HOST_WIDE_INT size, unsigned int align)
{
/* Storing by pieces involves moving constants into registers
of size MIN (ALIGN, BITS_PER_WORD), then storing them.
We need to decide whether it is cheaper to load the address of
constant data into a register and use a block move instead. */
/* If the data is only byte aligned, then:
(a1) A block move of less than 4 bytes would involve three 3 LBs and
3 SBs. We might as well use 3 single-instruction LIs and 3 SBs
instead.
(a2) A block move of 4 bytes from aligned source data can use an
LW/SWL/SWR sequence. This is often better than the 4 LIs and
4 SBs that we would generate when storing by pieces. */
if (align <= BITS_PER_UNIT)
return size < 4;
/* If the data is 2-byte aligned, then:
(b1) A block move of less than 4 bytes would use a combination of LBs,
LHs, SBs and SHs. We get better code by using single-instruction
LIs, SBs and SHs instead.
(b2) A block move of 4 bytes from aligned source data would again use
an LW/SWL/SWR sequence. In most cases, loading the address of
the source data would require at least one extra instruction.
It is often more efficient to use 2 single-instruction LIs and
2 SHs instead.
(b3) A block move of up to 3 additional bytes would be like (b1).
(b4) A block move of 8 bytes from aligned source data can use two
LW/SWL/SWR sequences or a single LD/SDL/SDR sequence. Both
sequences are better than the 4 LIs and 4 SHs that we'd generate
when storing by pieces.
The reasoning for higher alignments is similar:
(c1) A block move of less than 4 bytes would be the same as (b1).
(c2) A block move of 4 bytes would use an LW/SW sequence. Again,
loading the address of the source data would typically require
at least one extra instruction. It is generally better to use
LUI/ORI/SW instead.
(c3) A block move of up to 3 additional bytes would be like (b1).
(c4) A block move of 8 bytes can use two LW/SW sequences or a single
LD/SD sequence, and in these cases we've traditionally preferred
the memory copy over the more bulky constant moves. */
return size < 8;
}
/* Emit straight-line code to move LENGTH bytes from SRC to DEST.
Assume that the areas do not overlap. */
static void
mips_block_move_straight (rtx dest, rtx src, HOST_WIDE_INT length)
{
HOST_WIDE_INT offset, delta;
unsigned HOST_WIDE_INT bits;
int i;
machine_mode mode;
rtx *regs;
/* Work out how many bits to move at a time. If both operands have
half-word alignment, it is usually better to move in half words.
For instance, lh/lh/sh/sh is usually better than lwl/lwr/swl/swr
and lw/lw/sw/sw is usually better than ldl/ldr/sdl/sdr.
Otherwise move word-sized chunks.
For ISA_HAS_LWL_LWR we rely on the lwl/lwr & swl/swr load. Otherwise
picking the minimum of alignment or BITS_PER_WORD gets us the
desired size for bits. */
if (!ISA_HAS_LWL_LWR)
bits = MIN (BITS_PER_WORD, MIN (MEM_ALIGN (src), MEM_ALIGN (dest)));
else
{
if (MEM_ALIGN (src) == BITS_PER_WORD / 2
&& MEM_ALIGN (dest) == BITS_PER_WORD / 2)
bits = BITS_PER_WORD / 2;
else
bits = BITS_PER_WORD;
}
mode = int_mode_for_size (bits, 0).require ();
delta = bits / BITS_PER_UNIT;
/* Allocate a buffer for the temporary registers. */
regs = XALLOCAVEC (rtx, length / delta);
/* Load as many BITS-sized chunks as possible. Use a normal load if
the source has enough alignment, otherwise use left/right pairs. */
for (offset = 0, i = 0; offset + delta <= length; offset += delta, i++)
{
regs[i] = gen_reg_rtx (mode);
if (MEM_ALIGN (src) >= bits)
mips_emit_move (regs[i], adjust_address (src, mode, offset));
else
{
rtx part = adjust_address (src, BLKmode, offset);
set_mem_size (part, delta);
if (!mips_expand_ext_as_unaligned_load (regs[i], part, bits, 0, 0))
gcc_unreachable ();
}
}
/* Copy the chunks to the destination. */
for (offset = 0, i = 0; offset + delta <= length; offset += delta, i++)
if (MEM_ALIGN (dest) >= bits)
mips_emit_move (adjust_address (dest, mode, offset), regs[i]);
else
{
rtx part = adjust_address (dest, BLKmode, offset);
set_mem_size (part, delta);
if (!mips_expand_ins_as_unaligned_store (part, regs[i], bits, 0))
gcc_unreachable ();
}
/* Mop up any left-over bytes. */
if (offset < length)
{
src = adjust_address (src, BLKmode, offset);
dest = adjust_address (dest, BLKmode, offset);
move_by_pieces (dest, src, length - offset,
MIN (MEM_ALIGN (src), MEM_ALIGN (dest)), RETURN_BEGIN);
}
}
/* Helper function for doing a loop-based block operation on memory
reference MEM. Each iteration of the loop will operate on LENGTH
bytes of MEM.
Create a new base register for use within the loop and point it to
the start of MEM. Create a new memory reference that uses this
register. Store them in *LOOP_REG and *LOOP_MEM respectively. */
static void
mips_adjust_block_mem (rtx mem, HOST_WIDE_INT length,
rtx *loop_reg, rtx *loop_mem)
{
*loop_reg = copy_addr_to_reg (XEXP (mem, 0));
/* Although the new mem does not refer to a known location,
it does keep up to LENGTH bytes of alignment. */
*loop_mem = change_address (mem, BLKmode, *loop_reg);
set_mem_align (*loop_mem, MIN (MEM_ALIGN (mem), length * BITS_PER_UNIT));
}
/* Move LENGTH bytes from SRC to DEST using a loop that moves BYTES_PER_ITER
bytes at a time. LENGTH must be at least BYTES_PER_ITER. Assume that
the memory regions do not overlap. */
static void
mips_block_move_loop (rtx dest, rtx src, HOST_WIDE_INT length,
HOST_WIDE_INT bytes_per_iter)
{
rtx_code_label *label;
rtx src_reg, dest_reg, final_src, test;
HOST_WIDE_INT leftover;
leftover = length % bytes_per_iter;
length -= leftover;
/* Create registers and memory references for use within the loop. */
mips_adjust_block_mem (src, bytes_per_iter, &src_reg, &src);
mips_adjust_block_mem (dest, bytes_per_iter, &dest_reg, &dest);
/* Calculate the value that SRC_REG should have after the last iteration
of the loop. */
final_src = expand_simple_binop (Pmode, PLUS, src_reg, GEN_INT (length),
0, 0, OPTAB_WIDEN);
/* Emit the start of the loop. */
label = gen_label_rtx ();
emit_label (label);
/* Emit the loop body. */
mips_block_move_straight (dest, src, bytes_per_iter);
/* Move on to the next block. */
mips_emit_move (src_reg, plus_constant (Pmode, src_reg, bytes_per_iter));
mips_emit_move (dest_reg, plus_constant (Pmode, dest_reg, bytes_per_iter));
/* Emit the loop condition. */
test = gen_rtx_NE (VOIDmode, src_reg, final_src);
if (Pmode == DImode)
emit_jump_insn (gen_cbranchdi4 (test, src_reg, final_src, label));
else
emit_jump_insn (gen_cbranchsi4 (test, src_reg, final_src, label));
/* Mop up any left-over bytes. */
if (leftover)
mips_block_move_straight (dest, src, leftover);
else
/* Temporary fix for PR79150. */
emit_insn (gen_nop ());
}
/* Expand a cpymemsi instruction, which copies LENGTH bytes from
memory reference SRC to memory reference DEST. */
bool
mips_expand_block_move (rtx dest, rtx src, rtx length)
{
if (!ISA_HAS_LWL_LWR
&& (MEM_ALIGN (src) < MIPS_MIN_MOVE_MEM_ALIGN
|| MEM_ALIGN (dest) < MIPS_MIN_MOVE_MEM_ALIGN))
return false;
if (CONST_INT_P (length))
{
if (INTVAL (length) <= MIPS_MAX_MOVE_BYTES_STRAIGHT)
{
mips_block_move_straight (dest, src, INTVAL (length));
return true;
}
else if (optimize)
{
mips_block_move_loop (dest, src, INTVAL (length),
MIPS_MAX_MOVE_BYTES_PER_LOOP_ITER);
return true;
}
}
return false;
}
/* Expand a loop of synci insns for the address range [BEGIN, END). */
void
mips_expand_synci_loop (rtx begin, rtx end)
{
rtx inc, cmp_result, mask, length;
rtx_code_label *label, *end_label;
/* Create end_label. */
end_label = gen_label_rtx ();
/* Check if begin equals end. */
cmp_result = gen_rtx_EQ (VOIDmode, begin, end);
emit_jump_insn (gen_condjump (cmp_result, end_label));
/* Load INC with the cache line size (rdhwr INC,$1). */
inc = gen_reg_rtx (Pmode);
emit_insn (PMODE_INSN (gen_rdhwr_synci_step, (inc)));
/* Check if inc is 0. */
cmp_result = gen_rtx_EQ (VOIDmode, inc, const0_rtx);
emit_jump_insn (gen_condjump (cmp_result, end_label));
/* Calculate mask. */
mask = mips_force_unary (Pmode, NEG, inc);
/* Mask out begin by mask. */
begin = mips_force_binary (Pmode, AND, begin, mask);
/* Calculate length. */
length = mips_force_binary (Pmode, MINUS, end, begin);
/* Loop back to here. */
label = gen_label_rtx ();
emit_label (label);
emit_insn (gen_synci (begin));
/* Update length. */
mips_emit_binary (MINUS, length, length, inc);
/* Update begin. */
mips_emit_binary (PLUS, begin, begin, inc);
/* Check if length is greater than 0. */
cmp_result = gen_rtx_GT (VOIDmode, length, const0_rtx);
emit_jump_insn (gen_condjump (cmp_result, label));
emit_label (end_label);
}
/* Expand a QI or HI mode atomic memory operation.
GENERATOR contains a pointer to the gen_* function that generates
the SI mode underlying atomic operation using masks that we
calculate.
RESULT is the return register for the operation. Its value is NULL
if unused.
MEM is the location of the atomic access.
OLDVAL is the first operand for the operation.
NEWVAL is the optional second operand for the operation. Its value
is NULL if unused. */
void
mips_expand_atomic_qihi (union mips_gen_fn_ptrs generator,
rtx result, rtx mem, rtx oldval, rtx newval)
{
rtx orig_addr, memsi_addr, memsi, shift, shiftsi, unshifted_mask;
rtx unshifted_mask_reg, mask, inverted_mask, si_op;
rtx res = NULL;
machine_mode mode;
mode = GET_MODE (mem);
/* Compute the address of the containing SImode value. */
orig_addr = force_reg (Pmode, XEXP (mem, 0));
memsi_addr = mips_force_binary (Pmode, AND, orig_addr,
force_reg (Pmode, GEN_INT (-4)));
/* Create a memory reference for it. */
memsi = gen_rtx_MEM (SImode, memsi_addr);
set_mem_alias_set (memsi, ALIAS_SET_MEMORY_BARRIER);
MEM_VOLATILE_P (memsi) = MEM_VOLATILE_P (mem);
/* Work out the byte offset of the QImode or HImode value,
counting from the least significant byte. */
shift = mips_force_binary (Pmode, AND, orig_addr, GEN_INT (3));
if (TARGET_BIG_ENDIAN)
mips_emit_binary (XOR, shift, shift, GEN_INT (mode == QImode ? 3 : 2));
/* Multiply by eight to convert the shift value from bytes to bits. */
mips_emit_binary (ASHIFT, shift, shift, GEN_INT (3));
/* Make the final shift an SImode value, so that it can be used in
SImode operations. */
shiftsi = force_reg (SImode, gen_lowpart (SImode, shift));
/* Set MASK to an inclusive mask of the QImode or HImode value. */
unshifted_mask = GEN_INT (GET_MODE_MASK (mode));
unshifted_mask_reg = force_reg (SImode, unshifted_mask);
mask = mips_force_binary (SImode, ASHIFT, unshifted_mask_reg, shiftsi);
/* Compute the equivalent exclusive mask. */
inverted_mask = gen_reg_rtx (SImode);
emit_insn (gen_rtx_SET (inverted_mask, gen_rtx_NOT (SImode, mask)));
/* Shift the old value into place. */
if (oldval != const0_rtx)
{
oldval = convert_modes (SImode, mode, oldval, true);
oldval = force_reg (SImode, oldval);
oldval = mips_force_binary (SImode, ASHIFT, oldval, shiftsi);
}
/* Do the same for the new value. */
if (newval && newval != const0_rtx)
{
newval = convert_modes (SImode, mode, newval, true);
newval = force_reg (SImode, newval);
newval = mips_force_binary (SImode, ASHIFT, newval, shiftsi);
}
/* Do the SImode atomic access. */
if (result)
res = gen_reg_rtx (SImode);
if (newval)
si_op = generator.fn_6 (res, memsi, mask, inverted_mask, oldval, newval);
else if (result)
si_op = generator.fn_5 (res, memsi, mask, inverted_mask, oldval);
else
si_op = generator.fn_4 (memsi, mask, inverted_mask, oldval);
emit_insn (si_op);
if (result)
{
/* Shift and convert the result. */
mips_emit_binary (AND, res, res, mask);
mips_emit_binary (LSHIFTRT, res, res, shiftsi);
mips_emit_move (result, gen_lowpart (GET_MODE (result), res));
}
}
/* Return true if it is possible to use left/right accesses for a
bitfield of WIDTH bits starting BITPOS bits into BLKmode memory OP.
When returning true, update *LEFT and *RIGHT as follows:
*LEFT is a QImode reference to the first byte if big endian or
the last byte if little endian. This address can be used in the
left-side instructions (LWL, SWL, LDL, SDL).
*RIGHT is a QImode reference to the opposite end of the field and
can be used in the patterning right-side instruction. */
static bool
mips_get_unaligned_mem (rtx op, HOST_WIDE_INT width, HOST_WIDE_INT bitpos,
rtx *left, rtx *right)
{
rtx first, last;
/* Check that the size is valid. */
if (width != 32 && (!TARGET_64BIT || width != 64))
return false;
/* We can only access byte-aligned values. Since we are always passed
a reference to the first byte of the field, it is not necessary to
do anything with BITPOS after this check. */
if (bitpos % BITS_PER_UNIT != 0)
return false;
/* Reject aligned bitfields: we want to use a normal load or store
instead of a left/right pair. */
if (MEM_ALIGN (op) >= width)
return false;
/* Get references to both ends of the field. */
first = adjust_address (op, QImode, 0);
last = adjust_address (op, QImode, width / BITS_PER_UNIT - 1);
/* Allocate to LEFT and RIGHT according to endianness. LEFT should
correspond to the MSB and RIGHT to the LSB. */
if (TARGET_BIG_ENDIAN)
*left = first, *right = last;
else
*left = last, *right = first;
return true;
}
/* Try to use left/right loads to expand an "extv" or "extzv" pattern.
DEST, SRC, WIDTH and BITPOS are the operands passed to the expander;
the operation is the equivalent of:
(set DEST (*_extract SRC WIDTH BITPOS))
Return true on success. */
bool
mips_expand_ext_as_unaligned_load (rtx dest, rtx src, HOST_WIDE_INT width,
HOST_WIDE_INT bitpos, bool unsigned_p)
{
rtx left, right, temp;
rtx dest1 = NULL_RTX;
/* If TARGET_64BIT, the destination of a 32-bit "extz" or "extzv" will
be a DImode, create a new temp and emit a zero extend at the end. */
if (GET_MODE (dest) == DImode
&& (REG_P (dest) || (SUBREG_P (dest) && !MEM_P (SUBREG_REG (dest))))
&& GET_MODE_BITSIZE (SImode) == width)
{
dest1 = dest;
dest = gen_reg_rtx (SImode);
}
if (!mips_get_unaligned_mem (src, width, bitpos, &left, &right))
return false;
temp = gen_reg_rtx (GET_MODE (dest));
if (GET_MODE (dest) == DImode)
{
emit_insn (gen_mov_ldl (temp, src, left));
emit_insn (gen_mov_ldr (dest, copy_rtx (src), right, temp));
}
else
{
emit_insn (gen_mov_lwl (temp, src, left));
emit_insn (gen_mov_lwr (dest, copy_rtx (src), right, temp));
}
/* If we were loading 32bits and the original register was DI then
sign/zero extend into the orignal dest. */
if (dest1)
{
if (unsigned_p)
emit_insn (gen_zero_extendsidi2 (dest1, dest));
else
emit_insn (gen_extendsidi2 (dest1, dest));
}
return true;
}
/* Try to use left/right stores to expand an "ins" pattern. DEST, WIDTH,
BITPOS and SRC are the operands passed to the expander; the operation
is the equivalent of:
(set (zero_extract DEST WIDTH BITPOS) SRC)
Return true on success. */
bool
mips_expand_ins_as_unaligned_store (rtx dest, rtx src, HOST_WIDE_INT width,
HOST_WIDE_INT bitpos)
{
rtx left, right;
machine_mode mode;
if (!mips_get_unaligned_mem (dest, width, bitpos, &left, &right))
return false;
mode = int_mode_for_size (width, 0).require ();
src = gen_lowpart (mode, src);
if (mode == DImode)
{
emit_insn (gen_mov_sdl (dest, src, left));
emit_insn (gen_mov_sdr (copy_rtx (dest), copy_rtx (src), right));
}
else
{
emit_insn (gen_mov_swl (dest, src, left));
emit_insn (gen_mov_swr (copy_rtx (dest), copy_rtx (src), right));
}
return true;
}
/* Return true if X is a MEM with the same size as MODE. */
bool
mips_mem_fits_mode_p (machine_mode mode, rtx x)
{
return (MEM_P (x)
&& MEM_SIZE_KNOWN_P (x)
&& MEM_SIZE (x) == GET_MODE_SIZE (mode));
}
/* Return true if (zero_extract OP WIDTH BITPOS) can be used as the
source of an "ext" instruction or the destination of an "ins"
instruction. OP must be a register operand and the following
conditions must hold:
0 <= BITPOS < GET_MODE_BITSIZE (GET_MODE (op))
0 < WIDTH <= GET_MODE_BITSIZE (GET_MODE (op))
0 < BITPOS + WIDTH <= GET_MODE_BITSIZE (GET_MODE (op))
Also reject lengths equal to a word as they are better handled
by the move patterns. */
bool
mips_use_ins_ext_p (rtx op, HOST_WIDE_INT width, HOST_WIDE_INT bitpos)
{
if (!ISA_HAS_EXT_INS
|| !register_operand (op, VOIDmode)
|| GET_MODE_BITSIZE (GET_MODE (op)) > BITS_PER_WORD)
return false;
if (!IN_RANGE (width, 1, GET_MODE_BITSIZE (GET_MODE (op)) - 1))
return false;
if (bitpos < 0 || bitpos + width > GET_MODE_BITSIZE (GET_MODE (op)))
return false;
return true;
}
/* Check if MASK and SHIFT are valid in mask-low-and-shift-left
operation if MAXLEN is the maxium length of consecutive bits that
can make up MASK. MODE is the mode of the operation. See
mask_low_and_shift_len for the actual definition. */
bool
mask_low_and_shift_p (machine_mode mode, rtx mask, rtx shift, int maxlen)
{
return IN_RANGE (mask_low_and_shift_len (mode, mask, shift), 1, maxlen);
}
/* Return true iff OP1 and OP2 are valid operands together for the
*and<MODE>3 and *and<MODE>3_mips16 patterns. For the cases to consider,
see the table in the comment before the pattern. */
bool
and_operands_ok (machine_mode mode, rtx op1, rtx op2)
{
if (memory_operand (op1, mode))
{
if (TARGET_MIPS16) {
struct mips_address_info addr;
if (!mips_classify_address (&addr, op1, mode, false))
return false;
}
return and_load_operand (op2, mode);
}
else
return and_reg_operand (op2, mode);
}
/* The canonical form of a mask-low-and-shift-left operation is
(and (ashift X SHIFT) MASK) where MASK has the lower SHIFT number of bits
cleared. Thus we need to shift MASK to the right before checking if it
is a valid mask value. MODE is the mode of the operation. If true
return the length of the mask, otherwise return -1. */
int
mask_low_and_shift_len (machine_mode mode, rtx mask, rtx shift)
{
HOST_WIDE_INT shval;
shval = INTVAL (shift) & (GET_MODE_BITSIZE (mode) - 1);
return exact_log2 ((UINTVAL (mask) >> shval) + 1);
}
/* Return true if -msplit-addresses is selected and should be honored.
-msplit-addresses is a half-way house between explicit relocations
and the traditional assembler macros. It can split absolute 32-bit
symbolic constants into a high/lo_sum pair but uses macros for other
sorts of access.
Like explicit relocation support for REL targets, it relies
on GNU extensions in the assembler and the linker.
Although this code should work for -O0, it has traditionally
been treated as an optimization. */
static bool
mips_split_addresses_p (void)
{
return (TARGET_SPLIT_ADDRESSES
&& optimize
&& !TARGET_MIPS16
&& !flag_pic
&& !ABI_HAS_64BIT_SYMBOLS);
}
/* (Re-)Initialize mips_split_p, mips_lo_relocs and mips_hi_relocs. */
static void
mips_init_relocs (void)
{
memset (mips_split_p, '\0', sizeof (mips_split_p));
memset (mips_split_hi_p, '\0', sizeof (mips_split_hi_p));
memset (mips_use_pcrel_pool_p, '\0', sizeof (mips_use_pcrel_pool_p));
memset (mips_hi_relocs, '\0', sizeof (mips_hi_relocs));
memset (mips_lo_relocs, '\0', sizeof (mips_lo_relocs));
if (TARGET_MIPS16_PCREL_LOADS)
mips_use_pcrel_pool_p[SYMBOL_ABSOLUTE] = true;
else
{
if (ABI_HAS_64BIT_SYMBOLS)
{
if (TARGET_EXPLICIT_RELOCS)
{
mips_split_p[SYMBOL_64_HIGH] = true;
mips_hi_relocs[SYMBOL_64_HIGH] = "%highest(";
mips_lo_relocs[SYMBOL_64_HIGH] = "%higher(";
mips_split_p[SYMBOL_64_MID] = true;
mips_hi_relocs[SYMBOL_64_MID] = "%higher(";
mips_lo_relocs[SYMBOL_64_MID] = "%hi(";
mips_split_p[SYMBOL_64_LOW] = true;
mips_hi_relocs[SYMBOL_64_LOW] = "%hi(";
mips_lo_relocs[SYMBOL_64_LOW] = "%lo(";
mips_split_p[SYMBOL_ABSOLUTE] = true;
mips_lo_relocs[SYMBOL_ABSOLUTE] = "%lo(";
}
}
else
{
if (TARGET_EXPLICIT_RELOCS
|| mips_split_addresses_p ()
|| TARGET_MIPS16)
{
mips_split_p[SYMBOL_ABSOLUTE] = true;
mips_hi_relocs[SYMBOL_ABSOLUTE] = "%hi(";
mips_lo_relocs[SYMBOL_ABSOLUTE] = "%lo(";
}
}
}
if (TARGET_MIPS16)
{
/* The high part is provided by a pseudo copy of $gp. */
mips_split_p[SYMBOL_GP_RELATIVE] = true;
mips_lo_relocs[SYMBOL_GP_RELATIVE] = "%gprel(";
}
else if (TARGET_EXPLICIT_RELOCS)
/* Small data constants are kept whole until after reload,
then lowered by mips_rewrite_small_data. */
mips_lo_relocs[SYMBOL_GP_RELATIVE] = "%gp_rel(";
if (TARGET_EXPLICIT_RELOCS)
{
mips_split_p[SYMBOL_GOT_PAGE_OFST] = true;
if (TARGET_NEWABI)
{
mips_lo_relocs[SYMBOL_GOTOFF_PAGE] = "%got_page(";
mips_lo_relocs[SYMBOL_GOT_PAGE_OFST] = "%got_ofst(";
}
else
{
mips_lo_relocs[SYMBOL_GOTOFF_PAGE] = "%got(";
mips_lo_relocs[SYMBOL_GOT_PAGE_OFST] = "%lo(";
}
if (TARGET_MIPS16)
/* Expose the use of $28 as soon as possible. */
mips_split_hi_p[SYMBOL_GOT_PAGE_OFST] = true;
if (TARGET_XGOT)
{
/* The HIGH and LO_SUM are matched by special .md patterns. */
mips_split_p[SYMBOL_GOT_DISP] = true;
mips_split_p[SYMBOL_GOTOFF_DISP] = true;
mips_hi_relocs[SYMBOL_GOTOFF_DISP] = "%got_hi(";
mips_lo_relocs[SYMBOL_GOTOFF_DISP] = "%got_lo(";
mips_split_p[SYMBOL_GOTOFF_CALL] = true;
mips_hi_relocs[SYMBOL_GOTOFF_CALL] = "%call_hi(";
mips_lo_relocs[SYMBOL_GOTOFF_CALL] = "%call_lo(";
}
else
{
if (TARGET_NEWABI)
mips_lo_relocs[SYMBOL_GOTOFF_DISP] = "%got_disp(";
else
mips_lo_relocs[SYMBOL_GOTOFF_DISP] = "%got(";
mips_lo_relocs[SYMBOL_GOTOFF_CALL] = "%call16(";
if (TARGET_MIPS16)
/* Expose the use of $28 as soon as possible. */
mips_split_p[SYMBOL_GOT_DISP] = true;
}
}
if (TARGET_NEWABI)
{
mips_split_p[SYMBOL_GOTOFF_LOADGP] = true;
mips_hi_relocs[SYMBOL_GOTOFF_LOADGP] = "%hi(%neg(%gp_rel(";
mips_lo_relocs[SYMBOL_GOTOFF_LOADGP] = "%lo(%neg(%gp_rel(";
}
mips_lo_relocs[SYMBOL_TLSGD] = "%tlsgd(";
mips_lo_relocs[SYMBOL_TLSLDM] = "%tlsldm(";
if (TARGET_MIPS16_PCREL_LOADS)
{
mips_use_pcrel_pool_p[SYMBOL_DTPREL] = true;
mips_use_pcrel_pool_p[SYMBOL_TPREL] = true;
}
else
{
mips_split_p[SYMBOL_DTPREL] = true;
mips_hi_relocs[SYMBOL_DTPREL] = "%dtprel_hi(";
mips_lo_relocs[SYMBOL_DTPREL] = "%dtprel_lo(";
mips_split_p[SYMBOL_TPREL] = true;
mips_hi_relocs[SYMBOL_TPREL] = "%tprel_hi(";
mips_lo_relocs[SYMBOL_TPREL] = "%tprel_lo(";
}
mips_lo_relocs[SYMBOL_GOTTPREL] = "%gottprel(";
mips_lo_relocs[SYMBOL_HALF] = "%half(";
}
/* Print symbolic operand OP, which is part of a HIGH or LO_SUM
in context CONTEXT. RELOCS is the array of relocations to use. */
static void
mips_print_operand_reloc (FILE *file, rtx op, enum mips_symbol_context context,
const char **relocs)
{
enum mips_symbol_type symbol_type;
const char *p;
symbol_type = mips_classify_symbolic_expression (op, context);
gcc_assert (relocs[symbol_type]);
fputs (relocs[symbol_type], file);
output_addr_const (file, mips_strip_unspec_address (op));
for (p = relocs[symbol_type]; *p != 0; p++)
if (*p == '(')
fputc (')', file);
}
/* Start a new block with the given asm switch enabled. If we need
to print a directive, emit PREFIX before it and SUFFIX after it. */
static void
mips_push_asm_switch_1 (struct mips_asm_switch *asm_switch,
const char *prefix, const char *suffix)
{
if (asm_switch->nesting_level == 0)
fprintf (asm_out_file, "%s.set\tno%s%s", prefix, asm_switch->name, suffix);
asm_switch->nesting_level++;
}
/* Likewise, but end a block. */
static void
mips_pop_asm_switch_1 (struct mips_asm_switch *asm_switch,
const char *prefix, const char *suffix)
{
gcc_assert (asm_switch->nesting_level);
asm_switch->nesting_level--;
if (asm_switch->nesting_level == 0)
fprintf (asm_out_file, "%s.set\t%s%s", prefix, asm_switch->name, suffix);
}
/* Wrappers around mips_push_asm_switch_1 and mips_pop_asm_switch_1
that either print a complete line or print nothing. */
void
mips_push_asm_switch (struct mips_asm_switch *asm_switch)
{
mips_push_asm_switch_1 (asm_switch, "\t", "\n");
}
void
mips_pop_asm_switch (struct mips_asm_switch *asm_switch)
{
mips_pop_asm_switch_1 (asm_switch, "\t", "\n");
}
/* Print the text for PRINT_OPERAND punctation character CH to FILE.
The punctuation characters are:
'(' Start a nested ".set noreorder" block.
')' End a nested ".set noreorder" block.
'[' Start a nested ".set noat" block.
']' End a nested ".set noat" block.
'<' Start a nested ".set nomacro" block.
'>' End a nested ".set nomacro" block.
'*' Behave like %(%< if generating a delayed-branch sequence.
'#' Print a nop if in a ".set noreorder" block.
'/' Like '#', but do nothing within a delayed-branch sequence.
'?' Print "l" if mips_branch_likely is true
'~' Print a nop if mips_branch_likely is true
'.' Print the name of the register with a hard-wired zero (zero or $0).
'@' Print the name of the assembler temporary register (at or $1).
'^' Print the name of the pic call-through register (t9 or $25).
'+' Print the name of the gp register (usually gp or $28).
'$' Print the name of the stack pointer register (sp or $29).
':' Print "c" to use the compact version if the delay slot is a nop.
'!' Print "s" to use the short version if the delay slot contains a
16-bit instruction.
See also mips_init_print_operand_punct. */
static void
mips_print_operand_punctuation (FILE *file, int ch)
{
switch (ch)
{
case '(':
mips_push_asm_switch_1 (&mips_noreorder, "", "\n\t");
break;
case ')':
mips_pop_asm_switch_1 (&mips_noreorder, "\n\t", "");
break;
case '[':
mips_push_asm_switch_1 (&mips_noat, "", "\n\t");
break;
case ']':
mips_pop_asm_switch_1 (&mips_noat, "\n\t", "");
break;
case '<':
mips_push_asm_switch_1 (&mips_nomacro, "", "\n\t");
break;
case '>':
mips_pop_asm_switch_1 (&mips_nomacro, "\n\t", "");
break;
case '*':
if (final_sequence != 0)
{
mips_print_operand_punctuation (file, '(');
mips_print_operand_punctuation (file, '<');
}
break;
case '#':
if (mips_noreorder.nesting_level > 0)
fputs ("\n\tnop", file);
break;
case '/':
/* Print an extra newline so that the delayed insn is separated
from the following ones. This looks neater and is consistent
with non-nop delayed sequences. */
if (mips_noreorder.nesting_level > 0 && final_sequence == 0)
fputs ("\n\tnop\n", file);
break;
case '?':
if (mips_branch_likely)
putc ('l', file);
break;
case '~':
if (mips_branch_likely)
fputs ("\n\tnop", file);
break;
case '.':
fputs (reg_names[GP_REG_FIRST + 0], file);
break;
case '@':
fputs (reg_names[AT_REGNUM], file);
break;
case '^':
fputs (reg_names[PIC_FUNCTION_ADDR_REGNUM], file);
break;
case '+':
fputs (reg_names[PIC_OFFSET_TABLE_REGNUM], file);
break;
case '$':
fputs (reg_names[STACK_POINTER_REGNUM], file);
break;
case ':':
/* When final_sequence is 0, the delay slot will be a nop. We can
use the compact version where available. The %: formatter will
only be present if a compact form of the branch is available. */
if (final_sequence == 0)
putc ('c', file);
break;
case '!':
/* If the delay slot instruction is short, then use the
compact version. */
if (TARGET_MICROMIPS && !TARGET_INTERLINK_COMPRESSED && mips_isa_rev <= 5
&& (final_sequence == 0
|| get_attr_length (final_sequence->insn (1)) == 2))
putc ('s', file);
break;
default:
gcc_unreachable ();
break;
}
}
/* Initialize mips_print_operand_punct. */
static void
mips_init_print_operand_punct (void)
{
const char *p;
for (p = "()[]<>*#/?~.@^+$:!"; *p; p++)
mips_print_operand_punct[(unsigned char) *p] = true;
}
/* PRINT_OPERAND prefix LETTER refers to the integer branch instruction
associated with condition CODE. Print the condition part of the
opcode to FILE. */
static void
mips_print_int_branch_condition (FILE *file, enum rtx_code code, int letter)
{
switch (code)
{
case EQ:
case NE:
case GT:
case GE:
case LT:
case LE:
case GTU:
case GEU:
case LTU:
case LEU:
/* Conveniently, the MIPS names for these conditions are the same
as their RTL equivalents. */
fputs (GET_RTX_NAME (code), file);
break;
default:
output_operand_lossage ("'%%%c' is not a valid operand prefix", letter);
break;
}
}
/* Likewise floating-point branches. */
static void
mips_print_float_branch_condition (FILE *file, enum rtx_code code, int letter)
{
switch (code)
{
case EQ:
if (ISA_HAS_CCF)
fputs ("c1eqz", file);
else
fputs ("c1f", file);
break;
case NE:
if (ISA_HAS_CCF)
fputs ("c1nez", file);
else
fputs ("c1t", file);
break;
default:
output_operand_lossage ("'%%%c' is not a valid operand prefix", letter);
break;
}
}
/* Implement TARGET_PRINT_OPERAND_PUNCT_VALID_P. */
static bool
mips_print_operand_punct_valid_p (unsigned char code)
{
return mips_print_operand_punct[code];
}
/* Implement TARGET_PRINT_OPERAND. The MIPS-specific operand codes are:
'E' Print CONST_INT OP element 0 of a replicated CONST_VECTOR in decimal.
'X' Print CONST_INT OP in hexadecimal format.
'x' Print the low 16 bits of CONST_INT OP in hexadecimal format.
'd' Print CONST_INT OP in decimal.
'B' Print CONST_INT OP element 0 of a replicated CONST_VECTOR
as an unsigned byte [0..255].
'm' Print one less than CONST_INT OP in decimal.
'y' Print exact log2 of CONST_INT OP in decimal.
'h' Print the high-part relocation associated with OP, after stripping
any outermost HIGH.
'R' Print the low-part relocation associated with OP.
'C' Print the integer branch condition for comparison OP.
'N' Print the inverse of the integer branch condition for comparison OP.
'F' Print the FPU branch condition for comparison OP.
'W' Print the inverse of the FPU branch condition for comparison OP.
'w' Print a MSA register.
'T' Print 'f' for (eq:CC ...), 't' for (ne:CC ...),
'z' for (eq:?I ...), 'n' for (ne:?I ...).
't' Like 'T', but with the EQ/NE cases reversed
'Y' Print mips_fp_conditions[INTVAL (OP)]
'Z' Print OP and a comma for ISA_HAS_8CC, otherwise print nothing.
'q' Print a DSP accumulator register.
'D' Print the second part of a double-word register or memory operand.
'L' Print the low-order register in a double-word register operand.
'M' Print high-order register in a double-word register operand.
'z' Print $0 if OP is zero, otherwise print OP normally.
'b' Print the address of a memory operand, without offset.
'v' Print the insn size suffix b, h, w or d for vector modes V16QI, V8HI,
V4SI, V2SI, and w, d for vector modes V4SF, V2DF respectively.
'V' Print exact log2 of CONST_INT OP element 0 of a replicated
CONST_VECTOR in decimal. */
static void
mips_print_operand (FILE *file, rtx op, int letter)
{
enum rtx_code code;
if (mips_print_operand_punct_valid_p (letter))
{
mips_print_operand_punctuation (file, letter);
return;
}
gcc_assert (op);
code = GET_CODE (op);
switch (letter)
{
case 'E':
if (GET_CODE (op) == CONST_VECTOR)
{
gcc_assert (mips_const_vector_same_val_p (op, GET_MODE (op)));
op = CONST_VECTOR_ELT (op, 0);
gcc_assert (CONST_INT_P (op));
fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (op));
}
else
output_operand_lossage ("invalid use of '%%%c'", letter);
break;
case 'X':
if (CONST_INT_P (op))
fprintf (file, HOST_WIDE_INT_PRINT_HEX, INTVAL (op));
else
output_operand_lossage ("invalid use of '%%%c'", letter);
break;
case 'x':
if (CONST_INT_P (op))
fprintf (file, HOST_WIDE_INT_PRINT_HEX, INTVAL (op) & 0xffff);
else
output_operand_lossage ("invalid use of '%%%c'", letter);
break;
case 'd':
if (CONST_INT_P (op))
fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (op));
else
output_operand_lossage ("invalid use of '%%%c'", letter);
break;
case 'B':
if (GET_CODE (op) == CONST_VECTOR)
{
gcc_assert (mips_const_vector_same_val_p (op, GET_MODE (op)));
op = CONST_VECTOR_ELT (op, 0);
gcc_assert (CONST_INT_P (op));
unsigned HOST_WIDE_INT val8 = UINTVAL (op) & GET_MODE_MASK (QImode);
fprintf (file, HOST_WIDE_INT_PRINT_UNSIGNED, val8);
}
else
output_operand_lossage ("invalid use of '%%%c'", letter);
break;
case 'm':
if (CONST_INT_P (op))
fprintf (file, HOST_WIDE_INT_PRINT_DEC, INTVAL (op) - 1);
else
output_operand_lossage ("invalid use of '%%%c'", letter);
break;
case 'y':
if (CONST_INT_P (op))
{
int val = exact_log2 (INTVAL (op));
if (val != -1)
fprintf (file, "%d", val);
else
output_operand_lossage ("invalid use of '%%%c'", letter);
}
else
output_operand_lossage ("invalid use of '%%%c'", letter);
break;
case 'V':
if (GET_CODE (op) == CONST_VECTOR)
{
machine_mode mode = GET_MODE_INNER (GET_MODE (op));
unsigned HOST_WIDE_INT val = UINTVAL (CONST_VECTOR_ELT (op, 0));
int vlog2 = exact_log2 (val & GET_MODE_MASK (mode));
if (vlog2 != -1)
fprintf (file, "%d", vlog2);
else
output_operand_lossage ("invalid use of '%%%c'", letter);
}
else
output_operand_lossage ("invalid use of '%%%c'", letter);
break;
case 'h':
if (code == HIGH)
op = XEXP (op, 0);
mips_print_operand_reloc (file, op, SYMBOL_CONTEXT_LEA, mips_hi_relocs);
break;
case 'R':
mips_print_operand_reloc (file, op, SYMBOL_CONTEXT_LEA, mips_lo_relocs);
break;
case 'C':
mips_print_int_branch_condition (file, code, letter);
break;
case 'N':
mips_print_int_branch_condition (file, reverse_condition (code), letter);
break;
case 'F':
mips_print_float_branch_condition (file, code, letter);
break;
case 'W':
mips_print_float_branch_condition (file, reverse_condition (code),
letter);
break;
case 'T':
case 't':
{
int truth = (code == NE) == (letter == 'T');
fputc ("zfnt"[truth * 2 + ST_REG_P (REGNO (XEXP (op, 0)))], file);
}
break;
case 'Y':
if (code == CONST_INT && UINTVAL (op) < ARRAY_SIZE (mips_fp_conditions))
fputs (mips_fp_conditions[UINTVAL (op)], file);
else
output_operand_lossage ("'%%%c' is not a valid operand prefix",
letter);
break;
case 'Z':
if (ISA_HAS_8CC || ISA_HAS_CCF)
{
mips_print_operand (file, op, 0);
fputc (',', file);
}
break;
case 'q':
if (code == REG && MD_REG_P (REGNO (op)))
fprintf (file, "$ac0");
else if (code == REG && DSP_ACC_REG_P (REGNO (op)))
fprintf (file, "$ac%c", reg_names[REGNO (op)][3]);
else
output_operand_lossage ("invalid use of '%%%c'", letter);
break;
case 'w':
if (code == REG && MSA_REG_P (REGNO (op)))
fprintf (file, "$w%s", &reg_names[REGNO (op)][2]);
else
output_operand_lossage ("invalid use of '%%%c'", letter);
break;
case 'v':
switch (GET_MODE (op))
{
case E_V16QImode:
fprintf (file, "b");
break;
case E_V8HImode:
fprintf (file, "h");
break;
case E_V4SImode:
case E_V4SFmode:
fprintf (file, "w");
break;
case E_V2DImode:
case E_V2DFmode:
fprintf (file, "d");
break;
default:
output_operand_lossage ("invalid use of '%%%c'", letter);
}
break;
default:
switch (code)
{
case REG:
{
unsigned int regno = REGNO (op);
if ((letter == 'M' && TARGET_LITTLE_ENDIAN)
|| (letter == 'L' && TARGET_BIG_ENDIAN)
|| letter == 'D')
regno++;
else if (letter && letter != 'z' && letter != 'M' && letter != 'L')
output_operand_lossage ("invalid use of '%%%c'", letter);
/* We need to print $0 .. $31 for COP0 registers. */
if (COP0_REG_P (regno))
fprintf (file, "$%s", &reg_names[regno][4]);
else
fprintf (file, "%s", reg_names[regno]);
}
break;
case MEM:
if (letter == 'D')
output_address (GET_MODE (op), plus_constant (Pmode,
XEXP (op, 0), 4));
else if (letter == 'b')
{
gcc_assert (REG_P (XEXP (op, 0)));
mips_print_operand (file, XEXP (op, 0), 0);
}
else if (letter && letter != 'z')
output_operand_lossage ("invalid use of '%%%c'", letter);
else
output_address (GET_MODE (op), XEXP (op, 0));
break;
default:
if (letter == 'z' && op == CONST0_RTX (GET_MODE (op)))
fputs (reg_names[GP_REG_FIRST], file);
else if (letter && letter != 'z')
output_operand_lossage ("invalid use of '%%%c'", letter);
else if (CONST_GP_P (op))
fputs (reg_names[GLOBAL_POINTER_REGNUM], file);
else
output_addr_const (file, mips_strip_unspec_address (op));
break;
}
}
}
/* Implement TARGET_PRINT_OPERAND_ADDRESS. */
static void
mips_print_operand_address (FILE *file, machine_mode /*mode*/, rtx x)
{
struct mips_address_info addr;
if (mips_classify_address (&addr, x, word_mode, true))
switch (addr.type)
{
case ADDRESS_REG:
mips_print_operand (file, addr.offset, 0);
fprintf (file, "(%s)", reg_names[REGNO (addr.reg)]);
return;
case ADDRESS_LO_SUM:
mips_print_operand_reloc (file, addr.offset, SYMBOL_CONTEXT_MEM,
mips_lo_relocs);
fprintf (file, "(%s)", reg_names[REGNO (addr.reg)]);
return;
case ADDRESS_CONST_INT:
output_addr_const (file, x);
fprintf (file, "(%s)", reg_names[GP_REG_FIRST]);
return;
case ADDRESS_SYMBOLIC:
output_addr_const (file, mips_strip_unspec_address (x));
return;
}
gcc_unreachable ();
}
/* Implement TARGET_ENCODE_SECTION_INFO. */
static void
mips_encode_section_info (tree decl, rtx rtl, int first)
{
default_encode_section_info (decl, rtl, first);
if (TREE_CODE (decl) == FUNCTION_DECL)
{
rtx symbol = XEXP (rtl, 0);
tree type = TREE_TYPE (decl);
/* Encode whether the symbol is short or long. */
if ((TARGET_LONG_CALLS && !mips_near_type_p (type))
|| mips_far_type_p (type))
SYMBOL_REF_FLAGS (symbol) |= SYMBOL_FLAG_LONG_CALL;
}
}
/* Implement TARGET_SELECT_RTX_SECTION. */
static section *
mips_select_rtx_section (machine_mode mode, rtx x,
unsigned HOST_WIDE_INT align)
{
/* ??? Consider using mergeable small data sections. */
if (mips_rtx_constant_in_small_data_p (mode))
return get_named_section (NULL, ".sdata", 0);
return default_elf_select_rtx_section (mode, x, align);
}
/* Implement TARGET_IN_SMALL_DATA_P. */
static bool
mips_in_small_data_p (const_tree decl)
{
unsigned HOST_WIDE_INT size;
if (TREE_CODE (decl) == STRING_CST || TREE_CODE (decl) == FUNCTION_DECL)
return false;
/* We don't yet generate small-data references for -mabicalls
or VxWorks RTP code. See the related -G handling in
mips_option_override. */
if (TARGET_ABICALLS || TARGET_VXWORKS_RTP)
return false;
if (TREE_CODE (decl) == VAR_DECL && DECL_SECTION_NAME (decl) != 0)
{
const char *name;
/* Reject anything that isn't in a known small-data section. */
name = DECL_SECTION_NAME (decl);
if (strcmp (name, ".sdata") != 0 && strcmp (name, ".sbss") != 0)
return false;
/* If a symbol is defined externally, the assembler will use the
usual -G rules when deciding how to implement macros. */
if (mips_lo_relocs[SYMBOL_GP_RELATIVE] || !DECL_EXTERNAL (decl))
return true;
}
else if (TARGET_EMBEDDED_DATA)
{
/* Don't put constants into the small data section: we want them
to be in ROM rather than RAM. */
if (TREE_CODE (decl) != VAR_DECL)
return false;
if (TREE_READONLY (decl)
&& !TREE_SIDE_EFFECTS (decl)
&& (!DECL_INITIAL (decl) || TREE_CONSTANT (DECL_INITIAL (decl))))
return false;
}
/* Enforce -mlocal-sdata. */
if (!TARGET_LOCAL_SDATA && !TREE_PUBLIC (decl))
return false;
/* Enforce -mextern-sdata. */
if (!TARGET_EXTERN_SDATA && DECL_P (decl))
{
if (DECL_EXTERNAL (decl))
return false;
if (DECL_COMMON (decl) && DECL_INITIAL (decl) == NULL)
return false;
}
/* We have traditionally not treated zero-sized objects as small data,
so this is now effectively part of the ABI. */
size = int_size_in_bytes (TREE_TYPE (decl));
return size > 0 && size <= mips_small_data_threshold;
}
/* Implement TARGET_USE_ANCHORS_FOR_SYMBOL_P. We don't want to use
anchors for small data: the GP register acts as an anchor in that
case. We also don't want to use them for PC-relative accesses,
where the PC acts as an anchor. */
static bool
mips_use_anchors_for_symbol_p (const_rtx symbol)
{
switch (mips_classify_symbol (symbol, SYMBOL_CONTEXT_MEM))
{
case SYMBOL_PC_RELATIVE:
case SYMBOL_GP_RELATIVE:
return false;
default:
return default_use_anchors_for_symbol_p (symbol);
}
}
/* The MIPS debug format wants all automatic variables and arguments
to be in terms of the virtual frame pointer (stack pointer before
any adjustment in the function), while the MIPS 3.0 linker wants
the frame pointer to be the stack pointer after the initial
adjustment. So, we do the adjustment here. The arg pointer (which
is eliminated) points to the virtual frame pointer, while the frame
pointer (which may be eliminated) points to the stack pointer after
the initial adjustments. */
HOST_WIDE_INT
mips_debugger_offset (rtx addr, HOST_WIDE_INT offset)
{
rtx offset2 = const0_rtx;
rtx reg = eliminate_constant_term (addr, &offset2);
if (offset == 0)
offset = INTVAL (offset2);
if (reg == stack_pointer_rtx
|| reg == frame_pointer_rtx
|| reg == hard_frame_pointer_rtx)
{
offset -= cfun->machine->frame.total_size;
if (reg == hard_frame_pointer_rtx)
offset += cfun->machine->frame.hard_frame_pointer_offset;
}
return offset;
}
/* Implement ASM_OUTPUT_EXTERNAL. */
void
mips_output_external (FILE *file, tree decl, const char *name)
{
default_elf_asm_output_external (file, decl, name);
/* We output the name if and only if TREE_SYMBOL_REFERENCED is
set in order to avoid putting out names that are never really
used. */
if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
{
if (!TARGET_EXPLICIT_RELOCS && mips_in_small_data_p (decl))
{
/* When using assembler macros, emit .extern directives for
all small-data externs so that the assembler knows how
big they are.
In most cases it would be safe (though pointless) to emit
.externs for other symbols too. One exception is when an
object is within the -G limit but declared by the user to
be in a section other than .sbss or .sdata. */
fputs ("\t.extern\t", file);
assemble_name (file, name);
fprintf (file, ", " HOST_WIDE_INT_PRINT_DEC "\n",
int_size_in_bytes (TREE_TYPE (decl)));
}
}
}
/* Implement TARGET_ASM_OUTPUT_SOURCE_FILENAME. */
static void
mips_output_filename (FILE *stream, const char *name)
{
/* If we are emitting DWARF-2, let dwarf2out handle the ".file"
directives. */
if (dwarf_debuginfo_p ())
return;
else if (mips_output_filename_first_time)
{
mips_output_filename_first_time = 0;
num_source_filenames += 1;
current_function_file = name;
fprintf (stream, "\t.file\t%d ", num_source_filenames);
output_quoted_string (stream, name);
putc ('\n', stream);
}
/* If we are emitting stabs, let dbxout.c handle this (except for
the mips_output_filename_first_time case). */
else if (write_symbols == DBX_DEBUG)
return;
else if (name != current_function_file
&& strcmp (name, current_function_file) != 0)
{
num_source_filenames += 1;
current_function_file = name;
fprintf (stream, "\t.file\t%d ", num_source_filenames);
output_quoted_string (stream, name);
putc ('\n', stream);
}
}
/* Implement TARGET_ASM_OUTPUT_DWARF_DTPREL. */
static void ATTRIBUTE_UNUSED
mips_output_dwarf_dtprel (FILE *file, int size, rtx x)
{
switch (size)
{
case 4:
fputs ("\t.dtprelword\t", file);
break;
case 8:
fputs ("\t.dtpreldword\t", file);
break;
default:
gcc_unreachable ();
}
output_addr_const (file, x);
fputs ("+0x8000", file);
}
/* Implement TARGET_DWARF_REGISTER_SPAN. */
static rtx
mips_dwarf_register_span (rtx reg)
{
rtx high, low;
machine_mode mode;
/* TARGET_FLOATXX is implemented as 32-bit floating-point registers but
ensures that double-precision registers are treated as if they were
64-bit physical registers. The code will run correctly with 32-bit or
64-bit registers which means that dwarf information cannot be precise
for all scenarios. We choose to state that the 64-bit values are stored
in a single 64-bit 'piece'. This slightly unusual construct can then be
interpreted as either a pair of registers if the registers are 32-bit or
a single 64-bit register depending on hardware. */
mode = GET_MODE (reg);
if (FP_REG_P (REGNO (reg))
&& TARGET_FLOATXX
&& GET_MODE_SIZE (mode) > UNITS_PER_FPREG)
{
return gen_rtx_PARALLEL (VOIDmode, gen_rtvec (1, reg));
}
/* By default, GCC maps increasing register numbers to increasing
memory locations, but paired FPRs are always little-endian,
regardless of the prevailing endianness. */
else if (FP_REG_P (REGNO (reg))
&& TARGET_BIG_ENDIAN
&& MAX_FPRS_PER_FMT > 1
&& GET_MODE_SIZE (mode) > UNITS_PER_FPREG)
{
gcc_assert (GET_MODE_SIZE (mode) == UNITS_PER_HWFPVALUE);
high = mips_subword (reg, true);
low = mips_subword (reg, false);
return gen_rtx_PARALLEL (VOIDmode, gen_rtvec (2, high, low));
}
return NULL_RTX;
}
/* Implement TARGET_DWARF_FRAME_REG_MODE. */
static machine_mode
mips_dwarf_frame_reg_mode (int regno)
{
machine_mode mode = default_dwarf_frame_reg_mode (regno);
if (FP_REG_P (regno) && mips_abi == ABI_32 && !TARGET_FLOAT32)
mode = SImode;
return mode;
}
/* DSP ALU can bypass data with no delays for the following pairs. */
enum insn_code dspalu_bypass_table[][2] =
{
{CODE_FOR_mips_addsc, CODE_FOR_mips_addwc},
{CODE_FOR_mips_cmpu_eq_qb, CODE_FOR_mips_pick_qb},
{CODE_FOR_mips_cmpu_lt_qb, CODE_FOR_mips_pick_qb},
{CODE_FOR_mips_cmpu_le_qb, CODE_FOR_mips_pick_qb},
{CODE_FOR_mips_cmp_eq_ph, CODE_FOR_mips_pick_ph},
{CODE_FOR_mips_cmp_lt_ph, CODE_FOR_mips_pick_ph},
{CODE_FOR_mips_cmp_le_ph, CODE_FOR_mips_pick_ph},
{CODE_FOR_mips_wrdsp, CODE_FOR_mips_insv}
};
int
mips_dspalu_bypass_p (rtx out_insn, rtx in_insn)
{
int i;
int num_bypass = ARRAY_SIZE (dspalu_bypass_table);
enum insn_code out_icode = (enum insn_code) INSN_CODE (out_insn);
enum insn_code in_icode = (enum insn_code) INSN_CODE (in_insn);
for (i = 0; i < num_bypass; i++)
{
if (out_icode == dspalu_bypass_table[i][0]
&& in_icode == dspalu_bypass_table[i][1])
return true;
}
return false;
}
/* Implement ASM_OUTPUT_ASCII. */
void
mips_output_ascii (FILE *stream, const char *string, size_t len)
{
size_t i;
int cur_pos;
cur_pos = 17;
fprintf (stream, "\t.ascii\t\"");
for (i = 0; i < len; i++)
{
int c;
c = (unsigned char) string[i];
if (ISPRINT (c))
{
if (c == '\\' || c == '\"')
{
putc ('\\', stream);
cur_pos++;
}
putc (c, stream);
cur_pos++;
}
else
{
fprintf (stream, "\\%03o", c);
cur_pos += 4;
}
if (cur_pos > 72 && i+1 < len)
{
cur_pos = 17;
fprintf (stream, "\"\n\t.ascii\t\"");
}
}
fprintf (stream, "\"\n");
}
/* Return the pseudo-op for full SYMBOL_(D)TPREL address *ADDR.
Update *ADDR with the operand that should be printed. */
const char *
mips_output_tls_reloc_directive (rtx *addr)
{
enum mips_symbol_type type;
type = mips_classify_symbolic_expression (*addr, SYMBOL_CONTEXT_LEA);
*addr = mips_strip_unspec_address (*addr);
switch (type)
{
case SYMBOL_DTPREL:
return Pmode == SImode ? ".dtprelword\t%0" : ".dtpreldword\t%0";
case SYMBOL_TPREL:
return Pmode == SImode ? ".tprelword\t%0" : ".tpreldword\t%0";
default:
gcc_unreachable ();
}
}
/* Emit either a label, .comm, or .lcomm directive. When using assembler
macros, mark the symbol as written so that mips_asm_output_external
won't emit an .extern for it. STREAM is the output file, NAME is the
name of the symbol, INIT_STRING is the string that should be written
before the symbol and FINAL_STRING is the string that should be
written after it. FINAL_STRING is a printf format that consumes the
remaining arguments. */
void
mips_declare_object (FILE *stream, const char *name, const char *init_string,
const char *final_string, ...)
{
va_list ap;
fputs (init_string, stream);
assemble_name (stream, name);
va_start (ap, final_string);
vfprintf (stream, final_string, ap);
va_end (ap);
if (!TARGET_EXPLICIT_RELOCS)
{
tree name_tree = get_identifier (name);
TREE_ASM_WRITTEN (name_tree) = 1;
}
}
/* Declare a common object of SIZE bytes using asm directive INIT_STRING.
NAME is the name of the object and ALIGN is the required alignment
in bytes. TAKES_ALIGNMENT_P is true if the directive takes a third
alignment argument. */
void
mips_declare_common_object (FILE *stream, const char *name,
const char *init_string,
unsigned HOST_WIDE_INT size,
unsigned int align, bool takes_alignment_p)
{
if (!takes_alignment_p)
{
size += (align / BITS_PER_UNIT) - 1;
size -= size % (align / BITS_PER_UNIT);
mips_declare_object (stream, name, init_string,
"," HOST_WIDE_INT_PRINT_UNSIGNED "\n", size);
}
else
mips_declare_object (stream, name, init_string,
"," HOST_WIDE_INT_PRINT_UNSIGNED ",%u\n",
size, align / BITS_PER_UNIT);
}
/* Implement ASM_OUTPUT_ALIGNED_DECL_COMMON. This is usually the same as the
elfos.h version, but we also need to handle -muninit-const-in-rodata. */
void
mips_output_aligned_decl_common (FILE *stream, tree decl, const char *name,
unsigned HOST_WIDE_INT size,
unsigned int align)
{
/* If the target wants uninitialized const declarations in
.rdata then don't put them in .comm. */
if (TARGET_EMBEDDED_DATA
&& TARGET_UNINIT_CONST_IN_RODATA
&& TREE_CODE (decl) == VAR_DECL
&& TREE_READONLY (decl)
&& (DECL_INITIAL (decl) == 0 || DECL_INITIAL (decl) == error_mark_node))
{
if (TREE_PUBLIC (decl) && DECL_NAME (decl))
targetm.asm_out.globalize_label (stream, name);
switch_to_section (readonly_data_section);
ASM_OUTPUT_ALIGN (stream, floor_log2 (align / BITS_PER_UNIT));
mips_declare_object (stream, name, "",
":\n\t.space\t" HOST_WIDE_INT_PRINT_UNSIGNED "\n",
size);
}
else
mips_declare_common_object (stream, name, "\n\t.comm\t",
size, align, true);
}
#ifdef ASM_OUTPUT_SIZE_DIRECTIVE
extern int size_directive_output;
/* Implement ASM_DECLARE_OBJECT_NAME. This is like most of the standard ELF
definitions except that it uses mips_declare_object to emit the label. */
void
mips_declare_object_name (FILE *stream, const char *name,
tree decl ATTRIBUTE_UNUSED)
{
#ifdef ASM_OUTPUT_TYPE_DIRECTIVE
#ifdef USE_GNU_UNIQUE_OBJECT
/* As in elfos.h. */
if (USE_GNU_UNIQUE_OBJECT && DECL_ONE_ONLY (decl)
&& (!DECL_ARTIFICIAL (decl) || !TREE_READONLY (decl)))
ASM_OUTPUT_TYPE_DIRECTIVE (stream, name, "gnu_unique_object");
else
#endif
ASM_OUTPUT_TYPE_DIRECTIVE (stream, name, "object");
#endif
size_directive_output = 0;
if (!flag_inhibit_size_directive && DECL_SIZE (decl))
{
HOST_WIDE_INT size;
size_directive_output = 1;
size = int_size_in_bytes (TREE_TYPE (decl));
ASM_OUTPUT_SIZE_DIRECTIVE (stream, name, size);
}
mips_declare_object (stream, name, "", ":\n");
}
/* Implement ASM_FINISH_DECLARE_OBJECT. This is generic ELF stuff. */
void
mips_finish_declare_object (FILE *stream, tree decl, int top_level, int at_end)
{
const char *name;
name = XSTR (XEXP (DECL_RTL (decl), 0), 0);
if (!flag_inhibit_size_directive
&& DECL_SIZE (decl) != 0
&& !at_end
&& top_level
&& DECL_INITIAL (decl) == error_mark_node
&& !size_directive_output)
{
HOST_WIDE_INT size;
size_directive_output = 1;
size = int_size_in_bytes (TREE_TYPE (decl));
ASM_OUTPUT_SIZE_DIRECTIVE (stream, name, size);
}
}
#endif
/* Mark text contents as code or data, mainly for the purpose of correct
disassembly. Emit a local symbol and set its type appropriately for
that purpose. Also emit `.insn' if marking contents as code so that
the ISA mode is recorded and any padding that follows is disassembled
as correct instructions. */
void
mips_set_text_contents_type (FILE *file ATTRIBUTE_UNUSED,
const char *prefix ATTRIBUTE_UNUSED,
unsigned long num ATTRIBUTE_UNUSED,
bool function_p ATTRIBUTE_UNUSED)
{
#ifdef ASM_OUTPUT_TYPE_DIRECTIVE
char buf[(sizeof (num) * 10) / 4 + 2];
const char *fnname;
char *sname;
rtx symbol;
sprintf (buf, "%lu", num);
symbol = XEXP (DECL_RTL (current_function_decl), 0);
fnname = targetm.strip_name_encoding (XSTR (symbol, 0));
sname = ACONCAT ((prefix, fnname, "_", buf, NULL));
ASM_OUTPUT_TYPE_DIRECTIVE (file, sname, function_p ? "function" : "object");
assemble_name (file, sname);
fputs (":\n", file);
if (function_p)
fputs ("\t.insn\n", file);
#endif
}
/* Return the FOO in the name of the ".mdebug.FOO" section associated
with the current ABI. */
static const char *
mips_mdebug_abi_name (void)
{
switch (mips_abi)
{
case ABI_32:
return "abi32";
case ABI_O64:
return "abiO64";
case ABI_N32:
return "abiN32";
case ABI_64:
return "abi64";
case ABI_EABI:
return TARGET_64BIT ? "eabi64" : "eabi32";
default:
gcc_unreachable ();
}
}
/* Implement TARGET_ASM_FILE_START. */
static void
mips_file_start (void)
{
default_file_start ();
/* Generate a special section to describe the ABI switches used to
produce the resultant binary. */
/* Record the ABI itself. Modern versions of binutils encode
this information in the ELF header flags, but GDB needs the
information in order to correctly debug binaries produced by
older binutils. See the function mips_gdbarch_init in
gdb/mips-tdep.c. */
fprintf (asm_out_file, "\t.section .mdebug.%s\n\t.previous\n",
mips_mdebug_abi_name ());
/* There is no ELF header flag to distinguish long32 forms of the
EABI from long64 forms. Emit a special section to help tools
such as GDB. Do the same for o64, which is sometimes used with
-mlong64. */
if (mips_abi == ABI_EABI || mips_abi == ABI_O64)
fprintf (asm_out_file, "\t.section .gcc_compiled_long%d\n"
"\t.previous\n", TARGET_LONG64 ? 64 : 32);
/* Record the NaN encoding. */
if (HAVE_AS_NAN || mips_nan != MIPS_IEEE_754_DEFAULT)
fprintf (asm_out_file, "\t.nan\t%s\n",
mips_nan == MIPS_IEEE_754_2008 ? "2008" : "legacy");
#ifdef HAVE_AS_DOT_MODULE
/* Record the FP ABI. See below for comments. */
if (TARGET_NO_FLOAT)
#ifdef HAVE_AS_GNU_ATTRIBUTE
fputs ("\t.gnu_attribute 4, 0\n", asm_out_file);
#else
;
#endif
else if (!TARGET_HARD_FLOAT_ABI)
fputs ("\t.module\tsoftfloat\n", asm_out_file);
else if (!TARGET_DOUBLE_FLOAT)
fputs ("\t.module\tsinglefloat\n", asm_out_file);
else if (TARGET_FLOATXX)
fputs ("\t.module\tfp=xx\n", asm_out_file);
else if (TARGET_FLOAT64)
fputs ("\t.module\tfp=64\n", asm_out_file);
else
fputs ("\t.module\tfp=32\n", asm_out_file);
if (TARGET_ODD_SPREG)
fputs ("\t.module\toddspreg\n", asm_out_file);
else
fputs ("\t.module\tnooddspreg\n", asm_out_file);
fprintf (asm_out_file, "\t.module\tarch=%s\n", mips_arch_info->name);
/* FIXME: DSPR3 is not supported by GCC? gas does support it */
if (TARGET_DSPR2)
fputs ("\t.module\tdspr2\n", asm_out_file);
else if (TARGET_DSP)
fputs ("\t.module\tdsp\n", asm_out_file);
if (TARGET_EVA)
fputs ("\t.module\teva\n", asm_out_file);
if (TARGET_MCU)
fputs ("\t.module\tmcu\n", asm_out_file);
if (TARGET_MDMX)
fputs ("\t.module\tmdmx\n", asm_out_file);
if (TARGET_MIPS3D)
fputs ("\t.module\tmips3d\n", asm_out_file);
if (TARGET_MT)
fputs ("\t.module\tmt\n", asm_out_file);
if (TARGET_SMARTMIPS)
fputs ("\t.module\tsmartmips\n", asm_out_file);
if (TARGET_VIRT)
fputs ("\t.module\tvirt\n", asm_out_file);
if (TARGET_MSA)
fputs ("\t.module\tmsa\n", asm_out_file);
if (TARGET_XPA)
fputs ("\t.module\txpa\n", asm_out_file);
/* FIXME: MIPS16E2 is not supported by GCC? gas does support it */
if (TARGET_CRC)
fputs ("\t.module\tcrc\n", asm_out_file);
if (TARGET_GINV)
fputs ("\t.module\tginv\n", asm_out_file);
if (TARGET_LOONGSON_MMI)
fputs ("\t.module\tloongson-mmi\n", asm_out_file);
/* FIXME: LOONGSON-CAM is not supported by GCC? gas does support it */
if (TARGET_LOONGSON_EXT2)
fputs ("\t.module\tloongson-ext2\n", asm_out_file);
else if (TARGET_LOONGSON_EXT)
fputs ("\t.module\tloongson-ext\n", asm_out_file);
#else
#ifdef HAVE_AS_GNU_ATTRIBUTE
{
int attr;
/* No floating-point operations, -mno-float. */
if (TARGET_NO_FLOAT)
attr = 0;
/* Soft-float code, -msoft-float. */
else if (!TARGET_HARD_FLOAT_ABI)
attr = 3;
/* Single-float code, -msingle-float. */
else if (!TARGET_DOUBLE_FLOAT)
attr = 2;
/* 64-bit FP registers on a 32-bit target, -mips32r2 -mfp64.
Reserved attr=4.
This case used 12 callee-saved double-precision registers
and is deprecated. */
/* 64-bit or 32-bit FP registers on a 32-bit target, -mfpxx. */
else if (TARGET_FLOATXX)
attr = 5;
/* 64-bit FP registers on a 32-bit target, -mfp64 -modd-spreg. */
else if (mips_abi == ABI_32 && TARGET_FLOAT64 && TARGET_ODD_SPREG)
attr = 6;
/* 64-bit FP registers on a 32-bit target, -mfp64 -mno-odd-spreg. */
else if (mips_abi == ABI_32 && TARGET_FLOAT64)
attr = 7;
/* Regular FP code, FP regs same size as GP regs, -mdouble-float. */
else
attr = 1;
fprintf (asm_out_file, "\t.gnu_attribute 4, %d\n", attr);
/* 128-bit MSA. */
if (ISA_HAS_MSA)
fprintf (asm_out_file, "\t.gnu_attribute 8, 1\n");
}
#endif
#endif
/* If TARGET_ABICALLS, tell GAS to generate -KPIC code. */
if (TARGET_ABICALLS)
{
fprintf (asm_out_file, "\t.abicalls\n");
if (TARGET_ABICALLS_PIC0)
fprintf (asm_out_file, "\t.option\tpic0\n");
}
if (flag_verbose_asm)
fprintf (asm_out_file, "\n%s -G value = %d, Arch = %s, ISA = %d\n",
ASM_COMMENT_START,
mips_small_data_threshold, mips_arch_info->name, mips_isa);
}
/* Implement TARGET_ASM_CODE_END. */
static void
mips_code_end (void)
{
mips_finish_stub (&mips16_rdhwr_stub);
mips_finish_stub (&mips16_get_fcsr_stub);
mips_finish_stub (&mips16_set_fcsr_stub);
}
/* Make the last instruction frame-related and note that it performs
the operation described by FRAME_PATTERN. */
static void
mips_set_frame_expr (rtx frame_pattern)
{
rtx_insn *insn;
insn = get_last_insn ();
RTX_FRAME_RELATED_P (insn) = 1;
REG_NOTES (insn) = alloc_EXPR_LIST (REG_FRAME_RELATED_EXPR,
frame_pattern,
REG_NOTES (insn));
}
/* Return a frame-related rtx that stores REG at MEM.
REG must be a single register. */
static rtx
mips_frame_set (rtx mem, rtx reg)
{
rtx set;
set = gen_rtx_SET (mem, reg);
RTX_FRAME_RELATED_P (set) = 1;
return set;
}
/* Record that the epilogue has restored call-saved register REG. */
static void
mips_add_cfa_restore (rtx reg)
{
mips_epilogue.cfa_restores = alloc_reg_note (REG_CFA_RESTORE, reg,
mips_epilogue.cfa_restores);
}
/* If a MIPS16e SAVE or RESTORE instruction saves or restores register
mips16e_s2_s8_regs[X], it must also save the registers in indexes
X + 1 onwards. Likewise mips16e_a0_a3_regs. */
static const unsigned char mips16e_s2_s8_regs[] = {
30, 23, 22, 21, 20, 19, 18
};
static const unsigned char mips16e_a0_a3_regs[] = {
4, 5, 6, 7
};
/* A list of the registers that can be saved by the MIPS16e SAVE instruction,
ordered from the uppermost in memory to the lowest in memory. */
static const unsigned char mips16e_save_restore_regs[] = {
31, 30, 23, 22, 21, 20, 19, 18, 17, 16, 7, 6, 5, 4
};
/* Return the index of the lowest X in the range [0, SIZE) for which
bit REGS[X] is set in MASK. Return SIZE if there is no such X. */
static unsigned int
mips16e_find_first_register (unsigned int mask, const unsigned char *regs,
unsigned int size)
{
unsigned int i;
for (i = 0; i < size; i++)
if (BITSET_P (mask, regs[i]))
break;
return i;
}
/* *MASK_PTR is a mask of general-purpose registers and *NUM_REGS_PTR
is the number of set bits. If *MASK_PTR contains REGS[X] for some X
in [0, SIZE), adjust *MASK_PTR and *NUM_REGS_PTR so that the same
is true for all indexes (X, SIZE). */
static void
mips16e_mask_registers (unsigned int *mask_ptr, const unsigned char *regs,
unsigned int size, unsigned int *num_regs_ptr)
{
unsigned int i;
i = mips16e_find_first_register (*mask_ptr, regs, size);
for (i++; i < size; i++)
if (!BITSET_P (*mask_ptr, regs[i]))
{
*num_regs_ptr += 1;
*mask_ptr |= 1 << regs[i];
}
}
/* Return a simplified form of X using the register values in REG_VALUES.
REG_VALUES[R] is the last value assigned to hard register R, or null
if R has not been modified.
This function is rather limited, but is good enough for our purposes. */
static rtx
mips16e_collect_propagate_value (rtx x, rtx *reg_values)
{
x = avoid_constant_pool_reference (x);
if (UNARY_P (x))
{
rtx x0 = mips16e_collect_propagate_value (XEXP (x, 0), reg_values);
return simplify_gen_unary (GET_CODE (x), GET_MODE (x),
x0, GET_MODE (XEXP (x, 0)));
}
if (ARITHMETIC_P (x))
{
rtx x0 = mips16e_collect_propagate_value (XEXP (x, 0), reg_values);
rtx x1 = mips16e_collect_propagate_value (XEXP (x, 1), reg_values);
return simplify_gen_binary (GET_CODE (x), GET_MODE (x), x0, x1);
}
if (REG_P (x)
&& reg_values[REGNO (x)]
&& !rtx_unstable_p (reg_values[REGNO (x)]))
return reg_values[REGNO (x)];
return x;
}
/* Return true if (set DEST SRC) stores an argument register into its
caller-allocated save slot, storing the number of that argument
register in *REGNO_PTR if so. REG_VALUES is as for
mips16e_collect_propagate_value. */
static bool
mips16e_collect_argument_save_p (rtx dest, rtx src, rtx *reg_values,
unsigned int *regno_ptr)
{
unsigned int argno, regno;
HOST_WIDE_INT offset, required_offset;
rtx addr, base;
/* Check that this is a word-mode store. */
if (!MEM_P (dest) || !REG_P (src) || GET_MODE (dest) != word_mode)
return false;
/* Check that the register being saved is an unmodified argument
register. */
regno = REGNO (src);
if (!IN_RANGE (regno, GP_ARG_FIRST, GP_ARG_LAST) || reg_values[regno])
return false;
argno = regno - GP_ARG_FIRST;
/* Check whether the address is an appropriate stack-pointer or
frame-pointer access. */
addr = mips16e_collect_propagate_value (XEXP (dest, 0), reg_values);
mips_split_plus (addr, &base, &offset);
required_offset = cfun->machine->frame.total_size + argno * UNITS_PER_WORD;
if (base == hard_frame_pointer_rtx)
required_offset -= cfun->machine->frame.hard_frame_pointer_offset;
else if (base != stack_pointer_rtx)
return false;
if (offset != required_offset)
return false;
*regno_ptr = regno;
return true;
}
/* A subroutine of mips_expand_prologue, called only when generating
MIPS16e SAVE instructions. Search the start of the function for any
instructions that save argument registers into their caller-allocated
save slots. Delete such instructions and return a value N such that
saving [GP_ARG_FIRST, GP_ARG_FIRST + N) would make all the deleted
instructions redundant. */
static unsigned int
mips16e_collect_argument_saves (void)
{
rtx reg_values[FIRST_PSEUDO_REGISTER];
rtx_insn *insn, *next;
rtx set, dest, src;
unsigned int nargs, regno;
push_topmost_sequence ();
nargs = 0;
memset (reg_values, 0, sizeof (reg_values));
for (insn = get_insns (); insn; insn = next)
{
next = NEXT_INSN (insn);
if (NOTE_P (insn) || DEBUG_INSN_P (insn))
continue;
if (!INSN_P (insn))
break;
set = PATTERN (insn);
if (GET_CODE (set) != SET)
break;
dest = SET_DEST (set);
src = SET_SRC (set);
if (mips16e_collect_argument_save_p (dest, src, reg_values, &regno))
{
if (!BITSET_P (cfun->machine->frame.mask, regno))
{
delete_insn (insn);
nargs = MAX (nargs, (regno - GP_ARG_FIRST) + 1);
}
}
else if (REG_P (dest) && GET_MODE (dest) == word_mode)
reg_values[REGNO (dest)]
= mips16e_collect_propagate_value (src, reg_values);
else
break;
}
pop_topmost_sequence ();
return nargs;
}
/* Return a move between register REGNO and memory location SP + OFFSET.
REG_PARM_P is true if SP + OFFSET belongs to REG_PARM_STACK_SPACE.
Make the move a load if RESTORE_P, otherwise make it a store. */
static rtx
mips16e_save_restore_reg (bool restore_p, bool reg_parm_p,
HOST_WIDE_INT offset, unsigned int regno)
{
rtx reg, mem;
mem = gen_frame_mem (SImode, plus_constant (Pmode, stack_pointer_rtx,
offset));
reg = gen_rtx_REG (SImode, regno);
if (restore_p)
{
mips_add_cfa_restore (reg);
return gen_rtx_SET (reg, mem);
}
if (reg_parm_p)
return gen_rtx_SET (mem, reg);
return mips_frame_set (mem, reg);
}
/* Return RTL for a MIPS16e SAVE or RESTORE instruction; RESTORE_P says which.
The instruction must:
- Allocate or deallocate SIZE bytes in total; SIZE is known
to be nonzero.
- Save or restore as many registers in *MASK_PTR as possible.
The instruction saves the first registers at the top of the
allocated area, with the other registers below it.
- Save NARGS argument registers above the allocated area.
(NARGS is always zero if RESTORE_P.)
The SAVE and RESTORE instructions cannot save and restore all general
registers, so there may be some registers left over for the caller to
handle. Destructively modify *MASK_PTR so that it contains the registers
that still need to be saved or restored. The caller can save these
registers in the memory immediately below *OFFSET_PTR, which is a
byte offset from the bottom of the allocated stack area. */
static rtx
mips16e_build_save_restore (bool restore_p, unsigned int *mask_ptr,
HOST_WIDE_INT *offset_ptr, unsigned int nargs,
HOST_WIDE_INT size)
{
rtx pattern, set;
HOST_WIDE_INT offset, top_offset;
unsigned int i, regno;
int n;
gcc_assert (cfun->machine->frame.num_fp == 0);
/* Calculate the number of elements in the PARALLEL. We need one element
for the stack adjustment, one for each argument register save, and one
for each additional register move. */
n = 1 + nargs;
for (i = 0; i < ARRAY_SIZE (mips16e_save_restore_regs); i++)
if (BITSET_P (*mask_ptr, mips16e_save_restore_regs[i]))
n++;
/* Create the final PARALLEL. */
pattern = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (n));
n = 0;
/* Add the stack pointer adjustment. */
set = gen_rtx_SET (stack_pointer_rtx,
plus_constant (Pmode, stack_pointer_rtx,
restore_p ? size : -size));
RTX_FRAME_RELATED_P (set) = 1;
XVECEXP (pattern, 0, n++) = set;
/* Stack offsets in the PARALLEL are relative to the old stack pointer. */
top_offset = restore_p ? size : 0;
/* Save the arguments. */
for (i = 0; i < nargs; i++)
{
offset = top_offset + i * UNITS_PER_WORD;
set = mips16e_save_restore_reg (restore_p, true, offset,
GP_ARG_FIRST + i);
XVECEXP (pattern, 0, n++) = set;
}
/* Then fill in the other register moves. */
offset = top_offset;
for (i = 0; i < ARRAY_SIZE (mips16e_save_restore_regs); i++)
{
regno = mips16e_save_restore_regs[i];
if (BITSET_P (*mask_ptr, regno))
{
offset -= UNITS_PER_WORD;
set = mips16e_save_restore_reg (restore_p, false, offset, regno);
XVECEXP (pattern, 0, n++) = set;
*mask_ptr &= ~(1 << regno);
}
}
/* Tell the caller what offset it should use for the remaining registers. */
*offset_ptr = size + (offset - top_offset);
gcc_assert (n == XVECLEN (pattern, 0));
return pattern;
}
/* PATTERN is a PARALLEL whose first element adds ADJUST to the stack
pointer. Return true if PATTERN matches the kind of instruction
generated by mips16e_build_save_restore. If INFO is nonnull,
initialize it when returning true. */
bool
mips16e_save_restore_pattern_p (rtx pattern, HOST_WIDE_INT adjust,
struct mips16e_save_restore_info *info)
{
unsigned int i, nargs, mask, extra;
HOST_WIDE_INT top_offset, save_offset, offset;
rtx set, reg, mem, base;
int n;
if (!GENERATE_MIPS16E_SAVE_RESTORE)
return false;
/* Stack offsets in the PARALLEL are relative to the old stack pointer. */
top_offset = adjust > 0 ? adjust : 0;
/* Interpret all other members of the PARALLEL. */
save_offset = top_offset - UNITS_PER_WORD;
mask = 0;
nargs = 0;
i = 0;
for (n = 1; n < XVECLEN (pattern, 0); n++)
{
/* Check that we have a SET. */
set = XVECEXP (pattern, 0, n);
if (GET_CODE (set) != SET)
return false;
/* Check that the SET is a load (if restoring) or a store
(if saving). */
mem = adjust > 0 ? SET_SRC (set) : SET_DEST (set);
if (!MEM_P (mem))
return false;
/* Check that the address is the sum of the stack pointer and a
possibly-zero constant offset. */
mips_split_plus (XEXP (mem, 0), &base, &offset);
if (base != stack_pointer_rtx)
return false;
/* Check that SET's other operand is a register. */
reg = adjust > 0 ? SET_DEST (set) : SET_SRC (set);
if (!REG_P (reg))
return false;
/* Check for argument saves. */
if (offset == top_offset + nargs * UNITS_PER_WORD
&& REGNO (reg) == GP_ARG_FIRST + nargs)
nargs++;
else if (offset == save_offset)
{
while (mips16e_save_restore_regs[i++] != REGNO (reg))
if (i == ARRAY_SIZE (mips16e_save_restore_regs))
return false;
mask |= 1 << REGNO (reg);
save_offset -= UNITS_PER_WORD;
}
else
return false;
}
/* Check that the restrictions on register ranges are met. */
extra = 0;
mips16e_mask_registers (&mask, mips16e_s2_s8_regs,
ARRAY_SIZE (mips16e_s2_s8_regs), &extra);
mips16e_mask_registers (&mask, mips16e_a0_a3_regs,
ARRAY_SIZE (mips16e_a0_a3_regs), &extra);
if (extra != 0)
return false;
/* Make sure that the topmost argument register is not saved twice.
The checks above ensure that the same is then true for the other
argument registers. */
if (nargs > 0 && BITSET_P (mask, GP_ARG_FIRST + nargs - 1))
return false;
/* Pass back information, if requested. */
if (info)
{
info->nargs = nargs;
info->mask = mask;
info->size = (adjust > 0 ? adjust : -adjust);
}
return true;
}
/* Add a MIPS16e SAVE or RESTORE register-range argument to string S
for the register range [MIN_REG, MAX_REG]. Return a pointer to
the null terminator. */
static char *
mips16e_add_register_range (char *s, unsigned int min_reg,
unsigned int max_reg)
{
if (min_reg != max_reg)
s += sprintf (s, ",%s-%s", reg_names[min_reg], reg_names[max_reg]);
else
s += sprintf (s, ",%s", reg_names[min_reg]);
return s;
}
/* Return the assembly instruction for a MIPS16e SAVE or RESTORE instruction.
PATTERN and ADJUST are as for mips16e_save_restore_pattern_p. */
const char *
mips16e_output_save_restore (rtx pattern, HOST_WIDE_INT adjust)
{
static char buffer[300];
struct mips16e_save_restore_info info;
unsigned int i, end;
char *s;
/* Parse the pattern. */
if (!mips16e_save_restore_pattern_p (pattern, adjust, &info))
gcc_unreachable ();
/* Add the mnemonic. */
s = strcpy (buffer, adjust > 0 ? "restore\t" : "save\t");
s += strlen (s);
/* Save the arguments. */
if (info.nargs > 1)
s += sprintf (s, "%s-%s,", reg_names[GP_ARG_FIRST],
reg_names[GP_ARG_FIRST + info.nargs - 1]);
else if (info.nargs == 1)
s += sprintf (s, "%s,", reg_names[GP_ARG_FIRST]);
/* Emit the amount of stack space to allocate or deallocate. */
s += sprintf (s, "%d", (int) info.size);
/* Save or restore $16. */
if (BITSET_P (info.mask, 16))
s += sprintf (s, ",%s", reg_names[GP_REG_FIRST + 16]);
/* Save or restore $17. */
if (BITSET_P (info.mask, 17))
s += sprintf (s, ",%s", reg_names[GP_REG_FIRST + 17]);
/* Save or restore registers in the range $s2...$s8, which
mips16e_s2_s8_regs lists in decreasing order. Note that this
is a software register range; the hardware registers are not
numbered consecutively. */
end = ARRAY_SIZE (mips16e_s2_s8_regs);
i = mips16e_find_first_register (info.mask, mips16e_s2_s8_regs, end);
if (i < end)
s = mips16e_add_register_range (s, mips16e_s2_s8_regs[end - 1],
mips16e_s2_s8_regs[i]);
/* Save or restore registers in the range $a0...$a3. */
end = ARRAY_SIZE (mips16e_a0_a3_regs);
i = mips16e_find_first_register (info.mask, mips16e_a0_a3_regs, end);
if (i < end)
s = mips16e_add_register_range (s, mips16e_a0_a3_regs[i],
mips16e_a0_a3_regs[end - 1]);
/* Save or restore $31. */
if (BITSET_P (info.mask, RETURN_ADDR_REGNUM))
s += sprintf (s, ",%s", reg_names[RETURN_ADDR_REGNUM]);
return buffer;
}
/* Return true if the current function returns its value in a floating-point
register in MIPS16 mode. */
static bool
mips16_cfun_returns_in_fpr_p (void)
{
tree return_type = DECL_RESULT (current_function_decl);
return (TARGET_MIPS16
&& TARGET_HARD_FLOAT_ABI
&& !aggregate_value_p (return_type, current_function_decl)
&& mips_return_mode_in_fpr_p (DECL_MODE (return_type)));
}
/* Return true if predicate PRED is true for at least one instruction.
Cache the result in *CACHE, and assume that the result is true
if *CACHE is already true. */
static bool
mips_find_gp_ref (bool *cache, bool (*pred) (rtx_insn *))
{
rtx_insn *insn, *subinsn;
if (!*cache)
{
push_topmost_sequence ();
for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
FOR_EACH_SUBINSN (subinsn, insn)
if (USEFUL_INSN_P (subinsn) && pred (subinsn))
{
*cache = true;
break;
}
pop_topmost_sequence ();
}
return *cache;
}
/* Return true if INSN refers to the global pointer in an "inflexible" way.
See mips_cfun_has_inflexible_gp_ref_p for details. */
static bool
mips_insn_has_inflexible_gp_ref_p (rtx_insn *insn)
{
/* Uses of pic_offset_table_rtx in CALL_INSN_FUNCTION_USAGE
indicate that the target could be a traditional MIPS
lazily-binding stub. */
return find_reg_fusage (insn, USE, pic_offset_table_rtx);
}
/* Return true if the current function refers to the global pointer
in a way that forces $28 to be valid. This means that we can't
change the choice of global pointer, even for NewABI code.
One example of this (and one which needs several checks) is that
$28 must be valid when calling traditional MIPS lazy-binding stubs.
(This restriction does not apply to PLTs.) */
static bool
mips_cfun_has_inflexible_gp_ref_p (void)
{
/* If the function has a nonlocal goto, $28 must hold the correct
global pointer for the target function. That is, the target
of the goto implicitly uses $28. */
if (crtl->has_nonlocal_goto)
return true;
if (TARGET_ABICALLS_PIC2)
{
/* Symbolic accesses implicitly use the global pointer unless
-mexplicit-relocs is in effect. JAL macros to symbolic addresses
might go to traditional MIPS lazy-binding stubs. */
if (!TARGET_EXPLICIT_RELOCS)
return true;
/* FUNCTION_PROFILER includes a JAL to _mcount, which again
can be lazily-bound. */
if (crtl->profile)
return true;
/* MIPS16 functions that return in FPRs need to call an
external libgcc routine. This call is only made explict
during mips_expand_epilogue, and it too might be lazily bound. */
if (mips16_cfun_returns_in_fpr_p ())
return true;
}
return mips_find_gp_ref (&cfun->machine->has_inflexible_gp_insn_p,
mips_insn_has_inflexible_gp_ref_p);
}
/* Return true if INSN refers to the global pointer in a "flexible" way.
See mips_cfun_has_flexible_gp_ref_p for details. */
static bool
mips_insn_has_flexible_gp_ref_p (rtx_insn *insn)
{
return (get_attr_got (insn) != GOT_UNSET
|| mips_small_data_pattern_p (PATTERN (insn))
|| reg_overlap_mentioned_p (pic_offset_table_rtx, PATTERN (insn)));
}
/* Return true if the current function references the global pointer,
but if those references do not inherently require the global pointer
to be $28. Assume !mips_cfun_has_inflexible_gp_ref_p (). */
static bool
mips_cfun_has_flexible_gp_ref_p (void)
{
/* Reload can sometimes introduce constant pool references
into a function that otherwise didn't need them. For example,
suppose we have an instruction like:
(set (reg:DF R1) (float:DF (reg:SI R2)))
If R2 turns out to be a constant such as 1, the instruction may
have a REG_EQUAL note saying that R1 == 1.0. Reload then has
the option of using this constant if R2 doesn't get allocated
to a register.
In cases like these, reload will have added the constant to the
pool but no instruction will yet refer to it. */
if (TARGET_ABICALLS_PIC2 && !reload_completed && crtl->uses_const_pool)
return true;
return mips_find_gp_ref (&cfun->machine->has_flexible_gp_insn_p,
mips_insn_has_flexible_gp_ref_p);
}
/* Return the register that should be used as the global pointer
within this function. Return INVALID_REGNUM if the function
doesn't need a global pointer. */
static unsigned int
mips_global_pointer (void)
{
unsigned int regno;
/* $gp is always available unless we're using a GOT. */
if (!TARGET_USE_GOT)
return GLOBAL_POINTER_REGNUM;
/* If there are inflexible references to $gp, we must use the
standard register. */
if (mips_cfun_has_inflexible_gp_ref_p ())
return GLOBAL_POINTER_REGNUM;
/* If there are no current references to $gp, then the only uses
we can introduce later are those involved in long branches. */
if (TARGET_ABSOLUTE_JUMPS && !mips_cfun_has_flexible_gp_ref_p ())
return INVALID_REGNUM;
/* If the global pointer is call-saved, try to use a call-clobbered
alternative. */
if (TARGET_CALL_SAVED_GP && crtl->is_leaf)
for (regno = GP_REG_FIRST; regno <= GP_REG_LAST; regno++)
if (!df_regs_ever_live_p (regno)
&& call_used_regs[regno]
&& !fixed_regs[regno]
&& regno != PIC_FUNCTION_ADDR_REGNUM)
return regno;
return GLOBAL_POINTER_REGNUM;
}
/* Return true if the current function's prologue must load the global
pointer value into pic_offset_table_rtx and store the same value in
the function's cprestore slot (if any).
One problem we have to deal with is that, when emitting GOT-based
position independent code, long-branch sequences will need to load
the address of the branch target from the GOT. We don't know until
the very end of compilation whether (and where) the function needs
long branches, so we must ensure that _any_ branch can access the
global pointer in some form. However, we do not want to pessimize
the usual case in which all branches are short.
We handle this as follows:
(1) During reload, we set cfun->machine->global_pointer to
INVALID_REGNUM if we _know_ that the current function
doesn't need a global pointer. This is only valid if
long branches don't need the GOT.
Otherwise, we assume that we might need a global pointer
and pick an appropriate register.
(2) If cfun->machine->global_pointer != INVALID_REGNUM,
we ensure that the global pointer is available at every
block boundary bar entry and exit. We do this in one of two ways:
- If the function has a cprestore slot, we ensure that this
slot is valid at every branch. However, as explained in
point (6) below, there is no guarantee that pic_offset_table_rtx
itself is valid if new uses of the global pointer are introduced
after the first post-epilogue split.
We guarantee that the cprestore slot is valid by loading it
into a fake register, CPRESTORE_SLOT_REGNUM. We then make
this register live at every block boundary bar function entry
and exit. It is then invalid to move the load (and thus the
preceding store) across a block boundary.
- If the function has no cprestore slot, we guarantee that
pic_offset_table_rtx itself is valid at every branch.
See mips_eh_uses for the handling of the register liveness.
(3) During prologue and epilogue generation, we emit "ghost"
placeholder instructions to manipulate the global pointer.
(4) During prologue generation, we set cfun->machine->must_initialize_gp_p
and cfun->machine->must_restore_gp_when_clobbered_p if we already know
that the function needs a global pointer. (There is no need to set
them earlier than this, and doing it as late as possible leads to
fewer false positives.)
(5) If cfun->machine->must_initialize_gp_p is true during a
split_insns pass, we split the ghost instructions into real
instructions. These split instructions can then be optimized in
the usual way. Otherwise, we keep the ghost instructions intact,
and optimize for the case where they aren't needed. We still
have the option of splitting them later, if we need to introduce
new uses of the global pointer.
For example, the scheduler ignores a ghost instruction that
stores $28 to the stack, but it handles the split form of
the ghost instruction as an ordinary store.
(6) [OldABI only.] If cfun->machine->must_restore_gp_when_clobbered_p
is true during the first post-epilogue split_insns pass, we split
calls and restore_gp patterns into instructions that explicitly
load pic_offset_table_rtx from the cprestore slot. Otherwise,
we split these patterns into instructions that _don't_ load from
the cprestore slot.
If cfun->machine->must_restore_gp_when_clobbered_p is true at the
time of the split, then any instructions that exist at that time
can make free use of pic_offset_table_rtx. However, if we want
to introduce new uses of the global pointer after the split,
we must explicitly load the value from the cprestore slot, since
pic_offset_table_rtx itself might not be valid at a given point
in the function.
The idea is that we want to be able to delete redundant
loads from the cprestore slot in the usual case where no
long branches are needed.
(7) If cfun->machine->must_initialize_gp_p is still false at the end
of md_reorg, we decide whether the global pointer is needed for
long branches. If so, we set cfun->machine->must_initialize_gp_p
to true and split the ghost instructions into real instructions
at that stage.
Note that the ghost instructions must have a zero length for three reasons:
- Giving the length of the underlying $gp sequence might cause
us to use long branches in cases where they aren't really needed.
- They would perturb things like alignment calculations.
- More importantly, the hazard detection in md_reorg relies on
empty instructions having a zero length.
If we find a long branch and split the ghost instructions at the
end of md_reorg, the split could introduce more long branches.
That isn't a problem though, because we still do the split before
the final shorten_branches pass.
This is extremely ugly, but it seems like the best compromise between
correctness and efficiency. */
bool
mips_must_initialize_gp_p (void)
{
return cfun->machine->must_initialize_gp_p;
}
/* Return true if REGNO is a register that is ordinarily call-clobbered
but must nevertheless be preserved by an interrupt handler. */
static bool
mips_interrupt_extra_call_saved_reg_p (unsigned int regno)
{
if ((ISA_HAS_HILO || TARGET_DSP)
&& MD_REG_P (regno))
return true;
if (TARGET_DSP && DSP_ACC_REG_P (regno))
return true;
if (GP_REG_P (regno)
&& cfun->machine->use_shadow_register_set == SHADOW_SET_NO)
{
/* $0 is hard-wired. */
if (regno == GP_REG_FIRST)
return false;
/* The interrupt handler can treat kernel registers as
scratch registers. */
if (KERNEL_REG_P (regno))
return false;
/* The function will return the stack pointer to its original value
anyway. */
if (regno == STACK_POINTER_REGNUM)
return false;
/* Otherwise, return true for registers that aren't ordinarily
call-clobbered. */
return call_used_regs[regno];
}
return false;
}
/* Return true if the current function should treat register REGNO
as call-saved. */
static bool
mips_cfun_call_saved_reg_p (unsigned int regno)
{
/* If the user makes an ordinarily-call-saved register global,
that register is no longer call-saved. */
if (global_regs[regno])
return false;
/* Interrupt handlers need to save extra registers. */
if (cfun->machine->interrupt_handler_p
&& mips_interrupt_extra_call_saved_reg_p (regno))
return true;
/* call_insns preserve $28 unless they explicitly say otherwise,
so call_used_regs[] treats $28 as call-saved. However,
we want the ABI property rather than the default call_insn
property here. */
return (regno == GLOBAL_POINTER_REGNUM
? TARGET_CALL_SAVED_GP
: !call_used_regs[regno]);
}
/* Return true if the function body might clobber register REGNO.
We know that REGNO is call-saved. */
static bool
mips_cfun_might_clobber_call_saved_reg_p (unsigned int regno)
{
/* Some functions should be treated as clobbering all call-saved
registers. */
if (crtl->saves_all_registers)
return true;
/* DF handles cases where a register is explicitly referenced in
the rtl. Incoming values are passed in call-clobbered registers,
so we can assume that any live call-saved register is set within
the function. */
if (df_regs_ever_live_p (regno))
return true;
/* Check for registers that are clobbered by FUNCTION_PROFILER.
These clobbers are not explicit in the rtl. */
if (crtl->profile && MIPS_SAVE_REG_FOR_PROFILING_P (regno))
return true;
/* If we're using a call-saved global pointer, the function's
prologue will need to set it up. */
if (cfun->machine->global_pointer == regno)
return true;
/* The function's prologue will need to set the frame pointer if
frame_pointer_needed. */
if (regno == HARD_FRAME_POINTER_REGNUM && frame_pointer_needed)
return true;
/* If a MIPS16 function returns a value in FPRs, its epilogue
will need to call an external libgcc routine. This yet-to-be
generated call_insn will clobber $31. */
if (regno == RETURN_ADDR_REGNUM && mips16_cfun_returns_in_fpr_p ())
return true;
/* If REGNO is ordinarily call-clobbered, we must assume that any
called function could modify it. */
if (cfun->machine->interrupt_handler_p
&& !crtl->is_leaf
&& mips_interrupt_extra_call_saved_reg_p (regno))
return true;
return false;
}
/* Return true if the current function must save register REGNO. */
static bool
mips_save_reg_p (unsigned int regno)
{
if (mips_cfun_call_saved_reg_p (regno))
{
if (mips_cfun_might_clobber_call_saved_reg_p (regno))
return true;
/* Save both registers in an FPR pair if either one is used. This is
needed for the case when MIN_FPRS_PER_FMT == 1, which allows the odd
register to be used without the even register. */
if (FP_REG_P (regno)
&& MAX_FPRS_PER_FMT == 2
&& mips_cfun_might_clobber_call_saved_reg_p (regno + 1))
return true;
}
/* We need to save the incoming return address if __builtin_eh_return
is being used to set a different return address. */
if (regno == RETURN_ADDR_REGNUM && crtl->calls_eh_return)
return true;
return false;
}
/* Populate the current function's mips_frame_info structure.
MIPS stack frames look like:
+-------------------------------+
| |
| incoming stack arguments |
| |
+-------------------------------+
| |
| caller-allocated save area |
A | for register arguments |
| |
+-------------------------------+ <-- incoming stack pointer
| |
| callee-allocated save area |
B | for arguments that are |
| split between registers and |
| the stack |
| |
+-------------------------------+ <-- arg_pointer_rtx
| |
C | callee-allocated save area |
| for register varargs |
| |
+-------------------------------+ <-- frame_pointer_rtx
| | + cop0_sp_offset
| COP0 reg save area | + UNITS_PER_WORD
| |
+-------------------------------+ <-- frame_pointer_rtx + acc_sp_offset
| | + UNITS_PER_WORD
| accumulator save area |
| |
+-------------------------------+ <-- stack_pointer_rtx + fp_sp_offset
| | + UNITS_PER_HWFPVALUE
| FPR save area |
| |
+-------------------------------+ <-- stack_pointer_rtx + gp_sp_offset
| | + UNITS_PER_WORD
| GPR save area |
| |
+-------------------------------+ <-- frame_pointer_rtx with
| | \ -fstack-protector
| local variables | | var_size
| | /
+-------------------------------+
| | \
| $gp save area | | cprestore_size
| | /
P +-------------------------------+ <-- hard_frame_pointer_rtx for
| | \ MIPS16 code
| outgoing stack arguments | |
| | |
+-------------------------------+ | args_size
| | |
| caller-allocated save area | |
| for register arguments | |
| | /
+-------------------------------+ <-- stack_pointer_rtx
frame_pointer_rtx without
-fstack-protector
hard_frame_pointer_rtx for
non-MIPS16 code.
At least two of A, B and C will be empty.
Dynamic stack allocations such as alloca insert data at point P.
They decrease stack_pointer_rtx but leave frame_pointer_rtx and
hard_frame_pointer_rtx unchanged. */
static void
mips_compute_frame_info (void)
{
struct mips_frame_info *frame;
HOST_WIDE_INT offset, size;
unsigned int regno, i;
/* Skip re-computing the frame info after reload completed. */
if (reload_completed)
return;
/* Set this function's interrupt properties. */
if (mips_interrupt_type_p (TREE_TYPE (current_function_decl)))
{
if (mips_isa_rev < 2)
error ("the %<interrupt%> attribute requires a MIPS32r2 processor or greater");
else if (TARGET_MIPS16)
error ("interrupt handlers cannot be MIPS16 functions");
else
{
cfun->machine->interrupt_handler_p = true;
cfun->machine->int_mask =
mips_interrupt_mask (TREE_TYPE (current_function_decl));
cfun->machine->use_shadow_register_set =
mips_use_shadow_register_set (TREE_TYPE (current_function_decl));
cfun->machine->keep_interrupts_masked_p =
mips_keep_interrupts_masked_p (TREE_TYPE (current_function_decl));
cfun->machine->use_debug_exception_return_p =
mips_use_debug_exception_return_p (TREE_TYPE
(current_function_decl));
}
}
frame = &cfun->machine->frame;
memset (frame, 0, sizeof (*frame));
size = get_frame_size ();
/* The first two blocks contain the outgoing argument area and the $gp save
slot. This area isn't needed in leaf functions. We can also skip it
if we know that none of the called functions will use this space.
But if the target-independent frame size is nonzero, we have already
committed to allocating these in TARGET_STARTING_FRAME_OFFSET for
!FRAME_GROWS_DOWNWARD. */
if ((size == 0 || FRAME_GROWS_DOWNWARD)
&& (crtl->is_leaf || (cfun->machine->optimize_call_stack && !flag_pic)))
{
/* The MIPS 3.0 linker does not like functions that dynamically
allocate the stack and have 0 for STACK_DYNAMIC_OFFSET, since it
looks like we are trying to create a second frame pointer to the
function, so allocate some stack space to make it happy. */
if (cfun->calls_alloca)
frame->args_size = REG_PARM_STACK_SPACE (cfun->decl);
else
frame->args_size = 0;
frame->cprestore_size = 0;
}
else
{
frame->args_size = crtl->outgoing_args_size;
frame->cprestore_size = MIPS_GP_SAVE_AREA_SIZE;
}
/* MIPS16 code offsets the frame pointer by the size of the outgoing
arguments. This tends to increase the chances of using unextended
instructions for local variables and incoming arguments. */
if (TARGET_MIPS16)
frame->hard_frame_pointer_offset = frame->args_size;
/* PR 69129 / 69012: Beware of a possible race condition. mips_global_pointer
might call mips_cfun_has_inflexible_gp_ref_p which in turn can call
mips_find_gp_ref which will iterate over the current insn sequence.
If any of these insns use the cprestore_save_slot_operand or
cprestore_load_slot_operand predicates in order to be recognised then
they will call mips_cprestore_address_p which calls
mips_get_cprestore_base_and_offset which expects the frame information
to be filled in... In fact mips_get_cprestore_base_and_offset only
needs the args_size and hard_frame_pointer_offset fields to be filled
in, which is why the global_pointer field is initialised here and not
earlier. */
cfun->machine->global_pointer = mips_global_pointer ();
offset = frame->args_size + frame->cprestore_size;
/* Move above the local variables. */
frame->var_size = MIPS_STACK_ALIGN (size);
offset += frame->var_size;
/* Find out which GPRs we need to save. */
for (regno = GP_REG_FIRST; regno <= GP_REG_LAST; regno++)
if (mips_save_reg_p (regno))
{
frame->num_gp++;
frame->mask |= 1 << (regno - GP_REG_FIRST);
}
/* If this function calls eh_return, we must also save and restore the
EH data registers. */
if (crtl->calls_eh_return)
for (i = 0; EH_RETURN_DATA_REGNO (i) != INVALID_REGNUM; i++)
{
frame->num_gp++;
frame->mask |= 1 << (EH_RETURN_DATA_REGNO (i) - GP_REG_FIRST);
}
/* The MIPS16e SAVE and RESTORE instructions have two ranges of registers:
$a3-$a0 and $s2-$s8. If we save one register in the range, we must
save all later registers too. */
if (GENERATE_MIPS16E_SAVE_RESTORE)
{
mips16e_mask_registers (&frame->mask, mips16e_s2_s8_regs,
ARRAY_SIZE (mips16e_s2_s8_regs), &frame->num_gp);
mips16e_mask_registers (&frame->mask, mips16e_a0_a3_regs,
ARRAY_SIZE (mips16e_a0_a3_regs), &frame->num_gp);
}
/* Move above the GPR save area. */
if (frame->num_gp > 0)
{
offset += MIPS_STACK_ALIGN (frame->num_gp * UNITS_PER_WORD);
frame->gp_sp_offset = offset - UNITS_PER_WORD;
}
/* Find out which FPRs we need to save. This loop must iterate over
the same space as its companion in mips_for_each_saved_gpr_and_fpr. */
if (TARGET_HARD_FLOAT)
for (regno = FP_REG_FIRST; regno <= FP_REG_LAST; regno += MAX_FPRS_PER_FMT)
if (mips_save_reg_p (regno))
{
frame->num_fp += MAX_FPRS_PER_FMT;
frame->fmask |= ~(~0U << MAX_FPRS_PER_FMT) << (regno - FP_REG_FIRST);
}
/* Move above the FPR save area. */
if (frame->num_fp > 0)
{
offset += MIPS_STACK_ALIGN (frame->num_fp * UNITS_PER_FPREG);
frame->fp_sp_offset = offset - UNITS_PER_HWFPVALUE;
}
/* Add in space for the interrupt context information. */
if (cfun->machine->interrupt_handler_p)
{
/* Check HI/LO. */
if (mips_save_reg_p (LO_REGNUM) || mips_save_reg_p (HI_REGNUM))
{
frame->num_acc++;
frame->acc_mask |= (1 << 0);
}
/* Check accumulators 1, 2, 3. */
for (i = DSP_ACC_REG_FIRST; i <= DSP_ACC_REG_LAST; i += 2)
if (mips_save_reg_p (i) || mips_save_reg_p (i + 1))
{
frame->num_acc++;
frame->acc_mask |= 1 << (((i - DSP_ACC_REG_FIRST) / 2) + 1);
}
/* All interrupt context functions need space to preserve STATUS. */
frame->num_cop0_regs++;
/* We need to save EPC regardless of whether interrupts remain masked
as exceptions will corrupt EPC. */
frame->num_cop0_regs++;
}
/* Move above the accumulator save area. */
if (frame->num_acc > 0)
{
/* Each accumulator needs 2 words. */
offset += frame->num_acc * 2 * UNITS_PER_WORD;
frame->acc_sp_offset = offset - UNITS_PER_WORD;
}
/* Move above the COP0 register save area. */
if (frame->num_cop0_regs > 0)
{
offset += frame->num_cop0_regs * UNITS_PER_WORD;
frame->cop0_sp_offset = offset - UNITS_PER_WORD;
}
/* Determine if we can save the callee-saved registers in the frame
header. Restrict this to functions where there is no other reason
to allocate stack space so that we can eliminate the instructions
that modify the stack pointer. */
if (TARGET_OLDABI
&& optimize > 0
&& flag_frame_header_optimization
&& !MAIN_NAME_P (DECL_NAME (current_function_decl))
&& cfun->machine->varargs_size == 0
&& crtl->args.pretend_args_size == 0
&& frame->var_size == 0
&& frame->num_acc == 0
&& frame->num_cop0_regs == 0
&& frame->num_fp == 0
&& frame->num_gp > 0
&& frame->num_gp <= MAX_ARGS_IN_REGISTERS
&& !GENERATE_MIPS16E_SAVE_RESTORE
&& !cfun->machine->interrupt_handler_p
&& cfun->machine->does_not_use_frame_header
&& cfun->machine->optimize_call_stack
&& !cfun->machine->callers_may_not_allocate_frame
&& !mips_cfun_has_cprestore_slot_p ())
{
offset = 0;
frame->gp_sp_offset = REG_PARM_STACK_SPACE(cfun) - UNITS_PER_WORD;
cfun->machine->use_frame_header_for_callee_saved_regs = true;
}
/* Move above the callee-allocated varargs save area. */
offset += MIPS_STACK_ALIGN (cfun->machine->varargs_size);
frame->arg_pointer_offset = offset;
/* Move above the callee-allocated area for pretend stack arguments. */
offset += crtl->args.pretend_args_size;
frame->total_size = offset;
/* Work out the offsets of the save areas from the top of the frame. */
if (frame->gp_sp_offset > 0)
frame->gp_save_offset = frame->gp_sp_offset - offset;
if (frame->fp_sp_offset > 0)
frame->fp_save_offset = frame->fp_sp_offset - offset;
if (frame->acc_sp_offset > 0)
frame->acc_save_offset = frame->acc_sp_offset - offset;
if (frame->num_cop0_regs > 0)
frame->cop0_save_offset = frame->cop0_sp_offset - offset;
}
/* Return the style of GP load sequence that is being used for the
current function. */
enum mips_loadgp_style
mips_current_loadgp_style (void)
{
if (!TARGET_USE_GOT || cfun->machine->global_pointer == INVALID_REGNUM)
return LOADGP_NONE;
if (TARGET_RTP_PIC)
return LOADGP_RTP;
if (TARGET_ABSOLUTE_ABICALLS)
return LOADGP_ABSOLUTE;
return TARGET_NEWABI ? LOADGP_NEWABI : LOADGP_OLDABI;
}
/* Implement TARGET_FRAME_POINTER_REQUIRED. */
static bool
mips_frame_pointer_required (void)
{
/* If the function contains dynamic stack allocations, we need to
use the frame pointer to access the static parts of the frame. */
if (cfun->calls_alloca)
return true;
/* In MIPS16 mode, we need a frame pointer for a large frame; otherwise,
reload may be unable to compute the address of a local variable,
since there is no way to add a large constant to the stack pointer
without using a second temporary register. */
if (TARGET_MIPS16)
{
mips_compute_frame_info ();
if (!SMALL_OPERAND (cfun->machine->frame.total_size))
return true;
}
return false;
}
/* Make sure that we're not trying to eliminate to the wrong hard frame
pointer. */
static bool
mips_can_eliminate (const int from ATTRIBUTE_UNUSED, const int to)
{
return (to == HARD_FRAME_POINTER_REGNUM || to == STACK_POINTER_REGNUM);
}
/* Implement INITIAL_ELIMINATION_OFFSET. FROM is either the frame pointer
or argument pointer. TO is either the stack pointer or hard frame
pointer. */
HOST_WIDE_INT
mips_initial_elimination_offset (int from, int to)
{
HOST_WIDE_INT offset;
mips_compute_frame_info ();
/* Set OFFSET to the offset from the end-of-prologue stack pointer. */
switch (from)
{
case FRAME_POINTER_REGNUM:
if (FRAME_GROWS_DOWNWARD)
offset = (cfun->machine->frame.args_size
+ cfun->machine->frame.cprestore_size
+ cfun->machine->frame.var_size);
else
offset = 0;
break;
case ARG_POINTER_REGNUM:
offset = cfun->machine->frame.arg_pointer_offset;
break;
default:
gcc_unreachable ();
}
if (to == HARD_FRAME_POINTER_REGNUM)
offset -= cfun->machine->frame.hard_frame_pointer_offset;
return offset;
}
/* Implement TARGET_EXTRA_LIVE_ON_ENTRY. */
static void
mips_extra_live_on_entry (bitmap regs)
{
if (TARGET_USE_GOT)
{
/* PIC_FUNCTION_ADDR_REGNUM is live if we need it to set up
the global pointer. */
if (!TARGET_ABSOLUTE_ABICALLS)
bitmap_set_bit (regs, PIC_FUNCTION_ADDR_REGNUM);
/* The prologue may set MIPS16_PIC_TEMP_REGNUM to the value of
the global pointer. */
if (TARGET_MIPS16)
bitmap_set_bit (regs, MIPS16_PIC_TEMP_REGNUM);
/* See the comment above load_call<mode> for details. */
bitmap_set_bit (regs, GOT_VERSION_REGNUM);
}
}
/* Implement RETURN_ADDR_RTX. We do not support moving back to a
previous frame. */
rtx
mips_return_addr (int count, rtx frame ATTRIBUTE_UNUSED)
{
if (count != 0)
return const0_rtx;
return get_hard_reg_initial_val (Pmode, RETURN_ADDR_REGNUM);
}
/* Emit code to change the current function's return address to
ADDRESS. SCRATCH is available as a scratch register, if needed.
ADDRESS and SCRATCH are both word-mode GPRs. */
void
mips_set_return_address (rtx address, rtx scratch)
{
rtx slot_address;
gcc_assert (BITSET_P (cfun->machine->frame.mask, RETURN_ADDR_REGNUM));
slot_address = mips_add_offset (scratch, stack_pointer_rtx,
cfun->machine->frame.gp_sp_offset);
mips_emit_move (gen_frame_mem (GET_MODE (address), slot_address), address);
}
/* Return true if the current function has a cprestore slot. */
bool
mips_cfun_has_cprestore_slot_p (void)
{
return (cfun->machine->global_pointer != INVALID_REGNUM
&& cfun->machine->frame.cprestore_size > 0);
}
/* Fill *BASE and *OFFSET such that *BASE + *OFFSET refers to the
cprestore slot. LOAD_P is true if the caller wants to load from
the cprestore slot; it is false if the caller wants to store to
the slot. */
static void
mips_get_cprestore_base_and_offset (rtx *base, HOST_WIDE_INT *offset,
bool load_p)
{
const struct mips_frame_info *frame;
frame = &cfun->machine->frame;
/* .cprestore always uses the stack pointer instead of the frame pointer.
We have a free choice for direct stores for non-MIPS16 functions,
and for MIPS16 functions whose cprestore slot is in range of the
stack pointer. Using the stack pointer would sometimes give more
(early) scheduling freedom, but using the frame pointer would
sometimes give more (late) scheduling freedom. It's hard to
predict which applies to a given function, so let's keep things
simple.
Loads must always use the frame pointer in functions that call
alloca, and there's little benefit to using the stack pointer
otherwise. */
if (frame_pointer_needed && !(TARGET_CPRESTORE_DIRECTIVE && !load_p))
{
*base = hard_frame_pointer_rtx;
*offset = frame->args_size - frame->hard_frame_pointer_offset;
}
else
{
*base = stack_pointer_rtx;
*offset = frame->args_size;
}
}
/* Return true if X is the load or store address of the cprestore slot;
LOAD_P says which. */
bool
mips_cprestore_address_p (rtx x, bool load_p)
{
rtx given_base, required_base;
HOST_WIDE_INT given_offset, required_offset;
mips_split_plus (x, &given_base, &given_offset);
mips_get_cprestore_base_and_offset (&required_base, &required_offset, load_p);
return given_base == required_base && given_offset == required_offset;
}
/* Return a MEM rtx for the cprestore slot. LOAD_P is true if we are
going to load from it, false if we are going to store to it.
Use TEMP as a temporary register if need be. */
static rtx
mips_cprestore_slot (rtx temp, bool load_p)
{
rtx base;
HOST_WIDE_INT offset;
mips_get_cprestore_base_and_offset (&base, &offset, load_p);
return gen_frame_mem (Pmode, mips_add_offset (temp, base, offset));
}
/* Emit instructions to save global pointer value GP into cprestore
slot MEM. OFFSET is the offset that MEM applies to the base register.
MEM may not be a legitimate address. If it isn't, TEMP is a
temporary register that can be used, otherwise it is a SCRATCH. */
void
mips_save_gp_to_cprestore_slot (rtx mem, rtx offset, rtx gp, rtx temp)
{
if (TARGET_CPRESTORE_DIRECTIVE)
{
gcc_assert (gp == pic_offset_table_rtx);
emit_insn (PMODE_INSN (gen_cprestore, (mem, offset)));
}
else
mips_emit_move (mips_cprestore_slot (temp, false), gp);
}
/* Restore $gp from its save slot, using TEMP as a temporary base register
if need be. This function is for o32 and o64 abicalls only.
See mips_must_initialize_gp_p for details about how we manage the
global pointer. */
void
mips_restore_gp_from_cprestore_slot (rtx temp)
{
gcc_assert (TARGET_ABICALLS && TARGET_OLDABI && epilogue_completed);
if (!cfun->machine->must_restore_gp_when_clobbered_p)
{
emit_note (NOTE_INSN_DELETED);
return;
}
if (TARGET_MIPS16)
{
mips_emit_move (temp, mips_cprestore_slot (temp, true));
mips_emit_move (pic_offset_table_rtx, temp);
}
else
mips_emit_move (pic_offset_table_rtx, mips_cprestore_slot (temp, true));
if (!TARGET_EXPLICIT_RELOCS)
emit_insn (gen_blockage ());
}
/* A function to save or store a register. The first argument is the
register and the second is the stack slot. */
typedef void (*mips_save_restore_fn) (rtx, rtx);
/* Use FN to save or restore register REGNO. MODE is the register's
mode and OFFSET is the offset of its save slot from the current
stack pointer. */
static void
mips_save_restore_reg (machine_mode mode, int regno,
HOST_WIDE_INT offset, mips_save_restore_fn fn)
{
rtx mem;
mem = gen_frame_mem (mode, plus_constant (Pmode, stack_pointer_rtx,
offset));
fn (gen_rtx_REG (mode, regno), mem);
}
/* Call FN for each accumulator that is saved by the current function.
SP_OFFSET is the offset of the current stack pointer from the start
of the frame. */
static void
mips_for_each_saved_acc (HOST_WIDE_INT sp_offset, mips_save_restore_fn fn)
{
HOST_WIDE_INT offset;
int regno;
offset = cfun->machine->frame.acc_sp_offset - sp_offset;
if (BITSET_P (cfun->machine->frame.acc_mask, 0))
{
mips_save_restore_reg (word_mode, LO_REGNUM, offset, fn);
offset -= UNITS_PER_WORD;
mips_save_restore_reg (word_mode, HI_REGNUM, offset, fn);
offset -= UNITS_PER_WORD;
}
for (regno = DSP_ACC_REG_FIRST; regno <= DSP_ACC_REG_LAST; regno++)
if (BITSET_P (cfun->machine->frame.acc_mask,
((regno - DSP_ACC_REG_FIRST) / 2) + 1))
{
mips_save_restore_reg (word_mode, regno, offset, fn);
offset -= UNITS_PER_WORD;
}
}
/* Save register REG to MEM. Make the instruction frame-related. */
static void
mips_save_reg (rtx reg, rtx mem)
{
if (GET_MODE (reg) == DFmode
&& (!TARGET_FLOAT64
|| mips_abi == ABI_32))
{
rtx x1, x2;
mips_emit_move_or_split (mem, reg, SPLIT_IF_NECESSARY);
x1 = mips_frame_set (mips_subword (mem, false),
mips_subword (reg, false));
x2 = mips_frame_set (mips_subword (mem, true),
mips_subword (reg, true));
mips_set_frame_expr (gen_rtx_PARALLEL (VOIDmode, gen_rtvec (2, x1, x2)));
}
else
mips_emit_save_slot_move (mem, reg, MIPS_PROLOGUE_TEMP (GET_MODE (reg)));
}
/* Capture the register combinations that are allowed in a SWM or LWM
instruction. The entries are ordered by number of registers set in
the mask. We also ignore the single register encodings because a
normal SW/LW is preferred. */
static const unsigned int umips_swm_mask[17] = {
0xc0ff0000, 0x80ff0000, 0x40ff0000, 0x807f0000,
0x00ff0000, 0x803f0000, 0x007f0000, 0x801f0000,
0x003f0000, 0x800f0000, 0x001f0000, 0x80070000,
0x000f0000, 0x80030000, 0x00070000, 0x80010000,
0x00030000
};
static const unsigned int umips_swm_encoding[17] = {
25, 24, 9, 23, 8, 22, 7, 21, 6, 20, 5, 19, 4, 18, 3, 17, 2
};
/* Try to use a microMIPS LWM or SWM instruction to save or restore
as many GPRs in *MASK as possible. *OFFSET is the offset from the
stack pointer of the topmost save slot.
Remove from *MASK all registers that were handled using LWM and SWM.
Update *OFFSET so that it points to the first unused save slot. */
static bool
umips_build_save_restore (mips_save_restore_fn fn,
unsigned *mask, HOST_WIDE_INT *offset)
{
int nregs;
unsigned int i, j;
rtx pattern, set, reg, mem;
HOST_WIDE_INT this_offset;
rtx this_base;
/* Try matching $16 to $31 (s0 to ra). */
for (i = 0; i < ARRAY_SIZE (umips_swm_mask); i++)
if ((*mask & 0xffff0000) == umips_swm_mask[i])
break;
if (i == ARRAY_SIZE (umips_swm_mask))
return false;
/* Get the offset of the lowest save slot. */
nregs = (umips_swm_encoding[i] & 0xf) + (umips_swm_encoding[i] >> 4);
this_offset = *offset - UNITS_PER_WORD * (nregs - 1);
/* LWM/SWM can only support offsets from -2048 to 2047. */
if (!UMIPS_12BIT_OFFSET_P (this_offset))
return false;
/* Create the final PARALLEL. */
pattern = gen_rtx_PARALLEL (VOIDmode, rtvec_alloc (nregs));
this_base = stack_pointer_rtx;
/* For registers $16-$23 and $30. */
for (j = 0; j < (umips_swm_encoding[i] & 0xf); j++)
{
HOST_WIDE_INT offset = this_offset + j * UNITS_PER_WORD;
mem = gen_frame_mem (SImode, plus_constant (Pmode, this_base, offset));
unsigned int regno = (j != 8) ? 16 + j : 30;
*mask &= ~(1 << regno);
reg = gen_rtx_REG (SImode, regno);
if (fn == mips_save_reg)
set = mips_frame_set (mem, reg);
else
{
set = gen_rtx_SET (reg, mem);
mips_add_cfa_restore (reg);
}
XVECEXP (pattern, 0, j) = set;
}
/* For register $31. */
if (umips_swm_encoding[i] >> 4)
{
HOST_WIDE_INT offset = this_offset + j * UNITS_PER_WORD;
*mask &= ~(1 << 31);
mem = gen_frame_mem (SImode, plus_constant (Pmode, this_base, offset));
reg = gen_rtx_REG (SImode, 31);
if (fn == mips_save_reg)
set = mips_frame_set (mem, reg);
else
{
set = gen_rtx_SET (reg, mem);
mips_add_cfa_restore (reg);
}
XVECEXP (pattern, 0, j) = set;
}
pattern = emit_insn (pattern);
if (fn == mips_save_reg)
RTX_FRAME_RELATED_P (pattern) = 1;
/* Adjust the last offset. */
*offset -= UNITS_PER_WORD * nregs;
return true;
}
/* Call FN for each register that is saved by the current function.
SP_OFFSET is the offset of the current stack pointer from the start
of the frame. */
static void
mips_for_each_saved_gpr_and_fpr (HOST_WIDE_INT sp_offset,
mips_save_restore_fn fn)
{
machine_mode fpr_mode;
int regno;
const struct mips_frame_info *frame = &cfun->machine->frame;
HOST_WIDE_INT offset;
unsigned int mask;
/* Save registers starting from high to low. The debuggers prefer at least
the return register be stored at func+4, and also it allows us not to
need a nop in the epilogue if at least one register is reloaded in
addition to return address. */
offset = frame->gp_sp_offset - sp_offset;
mask = frame->mask;
if (TARGET_MICROMIPS)
umips_build_save_restore (fn, &mask, &offset);
for (regno = GP_REG_LAST; regno >= GP_REG_FIRST; regno--)
if (BITSET_P (mask, regno - GP_REG_FIRST))
{
/* Record the ra offset for use by mips_function_profiler. */
if (regno == RETURN_ADDR_REGNUM)
cfun->machine->frame.ra_fp_offset = offset + sp_offset;
mips_save_restore_reg (word_mode, regno, offset, fn);
offset -= UNITS_PER_WORD;
}
/* This loop must iterate over the same space as its companion in
mips_compute_frame_info. */
offset = cfun->machine->frame.fp_sp_offset - sp_offset;
fpr_mode = (TARGET_SINGLE_FLOAT ? SFmode : DFmode);
for (regno = FP_REG_LAST - MAX_FPRS_PER_FMT + 1;
regno >= FP_REG_FIRST;
regno -= MAX_FPRS_PER_FMT)
if (BITSET_P (cfun->machine->frame.fmask, regno - FP_REG_FIRST))
{
if (!TARGET_FLOAT64 && TARGET_DOUBLE_FLOAT
&& (fixed_regs[regno] || fixed_regs[regno + 1]))
{
if (fixed_regs[regno])
mips_save_restore_reg (SFmode, regno + 1, offset, fn);
else
mips_save_restore_reg (SFmode, regno, offset, fn);
}
else
mips_save_restore_reg (fpr_mode, regno, offset, fn);
offset -= GET_MODE_SIZE (fpr_mode);
}
}
/* Return true if a move between register REGNO and its save slot (MEM)
can be done in a single move. LOAD_P is true if we are loading
from the slot, false if we are storing to it. */
static bool
mips_direct_save_slot_move_p (unsigned int regno, rtx mem, bool load_p)
{
/* There is a specific MIPS16 instruction for saving $31 to the stack. */
if (TARGET_MIPS16 && !load_p && regno == RETURN_ADDR_REGNUM)
return false;
return mips_secondary_reload_class (REGNO_REG_CLASS (regno),
GET_MODE (mem), mem, load_p) == NO_REGS;
}
/* Emit a move from SRC to DEST, given that one of them is a register
save slot and that the other is a register. TEMP is a temporary
GPR of the same mode that is available if need be. */
void
mips_emit_save_slot_move (rtx dest, rtx src, rtx temp)
{
unsigned int regno;
rtx mem;
if (REG_P (src))
{
regno = REGNO (src);
mem = dest;
}
else
{
regno = REGNO (dest);
mem = src;
}
if (regno == cfun->machine->global_pointer && !mips_must_initialize_gp_p ())
{
/* We don't yet know whether we'll need this instruction or not.
Postpone the decision by emitting a ghost move. This move
is specifically not frame-related; only the split version is. */
if (TARGET_64BIT)
emit_insn (gen_move_gpdi (dest, src));
else
emit_insn (gen_move_gpsi (dest, src));
return;
}
if (regno == HI_REGNUM)
{
if (REG_P (dest))
{
mips_emit_move (temp, src);
if (TARGET_64BIT)
emit_insn (gen_mthidi_ti (gen_rtx_REG (TImode, MD_REG_FIRST),
temp, gen_rtx_REG (DImode, LO_REGNUM)));
else
emit_insn (gen_mthisi_di (gen_rtx_REG (DImode, MD_REG_FIRST),
temp, gen_rtx_REG (SImode, LO_REGNUM)));
}
else
{
if (TARGET_64BIT)
emit_insn (gen_mfhidi_ti (temp,
gen_rtx_REG (TImode, MD_REG_FIRST)));
else
emit_insn (gen_mfhisi_di (temp,
gen_rtx_REG (DImode, MD_REG_FIRST)));
mips_emit_move (dest, temp);
}
}
else if (mips_direct_save_slot_move_p (regno, mem, mem == src))
mips_emit_move (dest, src);
else
{
gcc_assert (!reg_overlap_mentioned_p (dest, temp));
mips_emit_move (temp, src);
mips_emit_move (dest, temp);
}
if (MEM_P (dest))
mips_set_frame_expr (mips_frame_set (dest, src));
}
/* If we're generating n32 or n64 abicalls, and the current function
does not use $28 as its global pointer, emit a cplocal directive.
Use pic_offset_table_rtx as the argument to the directive. */
static void
mips_output_cplocal (void)
{
if (!TARGET_EXPLICIT_RELOCS
&& mips_must_initialize_gp_p ()
&& cfun->machine->global_pointer != GLOBAL_POINTER_REGNUM)
output_asm_insn (".cplocal %+", 0);
}
/* Implement TARGET_OUTPUT_FUNCTION_PROLOGUE. */
static void
mips_output_function_prologue (FILE *file)
{
const char *fnname;
/* In MIPS16 mode, we may need to generate a non-MIPS16 stub to handle
floating-point arguments. */
if (TARGET_MIPS16
&& TARGET_HARD_FLOAT_ABI
&& crtl->args.info.fp_code != 0)
mips16_build_function_stub ();
/* Get the function name the same way that toplev.c does before calling
assemble_start_function. This is needed so that the name used here
exactly matches the name used in ASM_DECLARE_FUNCTION_NAME. */
fnname = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0);
mips_start_function_definition (fnname, TARGET_MIPS16);
/* Output MIPS-specific frame information. */
if (!flag_inhibit_size_directive)
{
const struct mips_frame_info *frame;
frame = &cfun->machine->frame;
/* .frame FRAMEREG, FRAMESIZE, RETREG. */
fprintf (file,
"\t.frame\t%s," HOST_WIDE_INT_PRINT_DEC ",%s\t\t"
"# vars= " HOST_WIDE_INT_PRINT_DEC
", regs= %d/%d"
", args= " HOST_WIDE_INT_PRINT_DEC
", gp= " HOST_WIDE_INT_PRINT_DEC "\n",
reg_names[frame_pointer_needed
? HARD_FRAME_POINTER_REGNUM
: STACK_POINTER_REGNUM],
(frame_pointer_needed
? frame->total_size - frame->hard_frame_pointer_offset
: frame->total_size),
reg_names[RETURN_ADDR_REGNUM],
frame->var_size,
frame->num_gp, frame->num_fp,
frame->args_size,
frame->cprestore_size);
/* .mask MASK, OFFSET. */
fprintf (file, "\t.mask\t0x%08x," HOST_WIDE_INT_PRINT_DEC "\n",
frame->mask, frame->gp_save_offset);
/* .fmask MASK, OFFSET. */
fprintf (file, "\t.fmask\t0x%08x," HOST_WIDE_INT_PRINT_DEC "\n",
frame->fmask, frame->fp_save_offset);
}
/* Handle the initialization of $gp for SVR4 PIC, if applicable.
Also emit the ".set noreorder; .set nomacro" sequence for functions
that need it. */
if (mips_must_initialize_gp_p ()
&& mips_current_loadgp_style () == LOADGP_OLDABI)
{
if (TARGET_MIPS16)
{
/* This is a fixed-form sequence. The position of the
first two instructions is important because of the
way _gp_disp is defined. */
output_asm_insn ("li\t$2,%%hi(_gp_disp)", 0);
output_asm_insn ("addiu\t$3,$pc,%%lo(_gp_disp)", 0);
output_asm_insn ("sll\t$2,16", 0);
output_asm_insn ("addu\t$2,$3", 0);
}
else
{
/* .cpload must be in a .set noreorder but not a
.set nomacro block. */
mips_push_asm_switch (&mips_noreorder);
output_asm_insn (".cpload\t%^", 0);
if (!cfun->machine->all_noreorder_p)
mips_pop_asm_switch (&mips_noreorder);
else
mips_push_asm_switch (&mips_nomacro);
}
}
else if (cfun->machine->all_noreorder_p)
{
mips_push_asm_switch (&mips_noreorder);
mips_push_asm_switch (&mips_nomacro);
}
/* Tell the assembler which register we're using as the global
pointer. This is needed for thunks, since they can use either
explicit relocs or assembler macros. */
mips_output_cplocal ();
}
/* Implement TARGET_OUTPUT_FUNCTION_EPILOGUE. */
static void
mips_output_function_epilogue (FILE *)
{
const char *fnname;
/* Reinstate the normal $gp. */
SET_REGNO (pic_offset_table_rtx, GLOBAL_POINTER_REGNUM);
mips_output_cplocal ();
if (cfun->machine->all_noreorder_p)
{
mips_pop_asm_switch (&mips_nomacro);
mips_pop_asm_switch (&mips_noreorder);
}
/* Get the function name the same way that toplev.c does before calling
assemble_start_function. This is needed so that the name used here
exactly matches the name used in ASM_DECLARE_FUNCTION_NAME. */
fnname = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0);
mips_end_function_definition (fnname);
}
/* Emit an optimisation barrier for accesses to the current frame. */
static void
mips_frame_barrier (void)
{
emit_clobber (gen_frame_mem (BLKmode, stack_pointer_rtx));
}
/* The __gnu_local_gp symbol. */
static GTY(()) rtx mips_gnu_local_gp;
/* If we're generating n32 or n64 abicalls, emit instructions
to set up the global pointer. */
static void
mips_emit_loadgp (void)
{
rtx addr, offset, incoming_address, base, index, pic_reg;
pic_reg = TARGET_MIPS16 ? MIPS16_PIC_TEMP : pic_offset_table_rtx;
switch (mips_current_loadgp_style ())
{
case LOADGP_ABSOLUTE:
if (mips_gnu_local_gp == NULL)
{
mips_gnu_local_gp = gen_rtx_SYMBOL_REF (Pmode, "__gnu_local_gp");
SYMBOL_REF_FLAGS (mips_gnu_local_gp) |= SYMBOL_FLAG_LOCAL;
}
emit_insn (PMODE_INSN (gen_loadgp_absolute,
(pic_reg, mips_gnu_local_gp)));
break;
case LOADGP_OLDABI:
/* Added by mips_output_function_prologue. */
break;
case LOADGP_NEWABI:
addr = XEXP (DECL_RTL (current_function_decl), 0);
offset = mips_unspec_address (addr, SYMBOL_GOTOFF_LOADGP);
incoming_address = gen_rtx_REG (Pmode, PIC_FUNCTION_ADDR_REGNUM);
emit_insn (PMODE_INSN (gen_loadgp_newabi,
(pic_reg, offset, incoming_address)));
break;
case LOADGP_RTP:
base = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (VXWORKS_GOTT_BASE));
index = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (VXWORKS_GOTT_INDEX));
emit_insn (PMODE_INSN (gen_loadgp_rtp, (pic_reg, base, index)));
break;
default:
return;
}
if (TARGET_MIPS16)
emit_insn (PMODE_INSN (gen_copygp_mips16,
(pic_offset_table_rtx, pic_reg)));
/* Emit a blockage if there are implicit uses of the GP register.
This includes profiled functions, because FUNCTION_PROFILE uses
a jal macro. */
if (!TARGET_EXPLICIT_RELOCS || crtl->profile)
emit_insn (gen_loadgp_blockage ());
}
#define PROBE_INTERVAL (1 << STACK_CHECK_PROBE_INTERVAL_EXP)
#if PROBE_INTERVAL > 32768
#error Cannot use indexed addressing mode for stack probing
#endif
/* Emit code to probe a range of stack addresses from FIRST to FIRST+SIZE,
inclusive. These are offsets from the current stack pointer. */
static void
mips_emit_probe_stack_range (HOST_WIDE_INT first, HOST_WIDE_INT size)
{
if (TARGET_MIPS16)
sorry ("%<-fstack-check=specific%> not implemented for MIPS16");
/* See if we have a constant small number of probes to generate. If so,
that's the easy case. */
if (first + size <= 32768)
{
HOST_WIDE_INT i;
/* Probe at FIRST + N * PROBE_INTERVAL for values of N from 1 until
it exceeds SIZE. If only one probe is needed, this will not
generate any code. Then probe at FIRST + SIZE. */
for (i = PROBE_INTERVAL; i < size; i += PROBE_INTERVAL)
emit_stack_probe (plus_constant (Pmode, stack_pointer_rtx,
-(first + i)));
emit_stack_probe (plus_constant (Pmode, stack_pointer_rtx,
-(first + size)));
}
/* Otherwise, do the same as above, but in a loop. Note that we must be
extra careful with variables wrapping around because we might be at
the very top (or the very bottom) of the address space and we have
to be able to handle this case properly; in particular, we use an
equality test for the loop condition. */
else
{
HOST_WIDE_INT rounded_size;
rtx r3 = MIPS_PROLOGUE_TEMP (Pmode);
rtx r12 = MIPS_PROLOGUE_TEMP2 (Pmode);
/* Sanity check for the addressing mode we're going to use. */
gcc_assert (first <= 32768);
/* Step 1: round SIZE to the previous multiple of the interval. */
rounded_size = ROUND_DOWN (size, PROBE_INTERVAL);
/* Step 2: compute initial and final value of the loop counter. */
/* TEST_ADDR = SP + FIRST. */
emit_insn (gen_rtx_SET (r3, plus_constant (Pmode, stack_pointer_rtx,
-first)));
/* LAST_ADDR = SP + FIRST + ROUNDED_SIZE. */
if (rounded_size > 32768)
{
emit_move_insn (r12, GEN_INT (rounded_size));
emit_insn (gen_rtx_SET (r12, gen_rtx_MINUS (Pmode, r3, r12)));
}
else
emit_insn (gen_rtx_SET (r12, plus_constant (Pmode, r3,
-rounded_size)));
/* Step 3: the loop
do
{
TEST_ADDR = TEST_ADDR + PROBE_INTERVAL
probe at TEST_ADDR
}
while (TEST_ADDR != LAST_ADDR)
probes at FIRST + N * PROBE_INTERVAL for values of N from 1
until it is equal to ROUNDED_SIZE. */
emit_insn (PMODE_INSN (gen_probe_stack_range, (r3, r3, r12)));
/* Step 4: probe at FIRST + SIZE if we cannot assert at compile-time
that SIZE is equal to ROUNDED_SIZE. */
if (size != rounded_size)
emit_stack_probe (plus_constant (Pmode, r12, rounded_size - size));
}
/* Make sure nothing is scheduled before we are done. */
emit_insn (gen_blockage ());
}
/* Probe a range of stack addresses from REG1 to REG2 inclusive. These are
absolute addresses. */
const char *
mips_output_probe_stack_range (rtx reg1, rtx reg2)
{
static int labelno = 0;
char loop_lab[32], tmp[64];
rtx xops[2];
ASM_GENERATE_INTERNAL_LABEL (loop_lab, "LPSRL", labelno++);
/* Loop. */
ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, loop_lab);
/* TEST_ADDR = TEST_ADDR + PROBE_INTERVAL. */
xops[0] = reg1;
xops[1] = GEN_INT (-PROBE_INTERVAL);
if (TARGET_64BIT && TARGET_LONG64)
output_asm_insn ("daddiu\t%0,%0,%1", xops);
else
output_asm_insn ("addiu\t%0,%0,%1", xops);
/* Probe at TEST_ADDR, test if TEST_ADDR == LAST_ADDR and branch. */
xops[1] = reg2;
strcpy (tmp, "%(%<bne\t%0,%1,");
output_asm_insn (strcat (tmp, &loop_lab[1]), xops);
if (TARGET_64BIT)
output_asm_insn ("sd\t$0,0(%0)%)", xops);
else
output_asm_insn ("sw\t$0,0(%0)%)", xops);
return "";
}
/* Return true if X contains a kernel register. */
static bool
mips_refers_to_kernel_reg_p (const_rtx x)
{
subrtx_iterator::array_type array;
FOR_EACH_SUBRTX (iter, array, x, NONCONST)
if (REG_P (*iter) && KERNEL_REG_P (REGNO (*iter)))
return true;
return false;
}
/* Expand the "prologue" pattern. */
void
mips_expand_prologue (void)
{
const struct mips_frame_info *frame;
HOST_WIDE_INT size;
unsigned int nargs;
if (cfun->machine->global_pointer != INVALID_REGNUM)
{
/* Check whether an insn uses pic_offset_table_rtx, either explicitly
or implicitly. If so, we can commit to using a global pointer
straight away, otherwise we need to defer the decision. */
if (mips_cfun_has_inflexible_gp_ref_p ()
|| mips_cfun_has_flexible_gp_ref_p ())
{
cfun->machine->must_initialize_gp_p = true;
cfun->machine->must_restore_gp_when_clobbered_p = true;
}
SET_REGNO (pic_offset_table_rtx, cfun->machine->global_pointer);
}
frame = &cfun->machine->frame;
size = frame->total_size;
if (flag_stack_usage_info)
current_function_static_stack_size = size;
if (flag_stack_check == STATIC_BUILTIN_STACK_CHECK
|| flag_stack_clash_protection)
{
if (crtl->is_leaf && !cfun->calls_alloca)
{
if (size > PROBE_INTERVAL && size > get_stack_check_protect ())
mips_emit_probe_stack_range (get_stack_check_protect (),
size - get_stack_check_protect ());
}
else if (size > 0)
mips_emit_probe_stack_range (get_stack_check_protect (), size);
}
/* Save the registers. Allocate up to MIPS_MAX_FIRST_STACK_STEP
bytes beforehand; this is enough to cover the register save area
without going out of range. */
if (((frame->mask | frame->fmask | frame->acc_mask) != 0)
|| frame->num_cop0_regs > 0)
{
HOST_WIDE_INT step1;
step1 = MIN (size, MIPS_MAX_FIRST_STACK_STEP);
if (GENERATE_MIPS16E_SAVE_RESTORE)
{
HOST_WIDE_INT offset;
unsigned int mask, regno;
/* Try to merge argument stores into the save instruction. */
nargs = mips16e_collect_argument_saves ();
/* Build the save instruction. */
mask = frame->mask;
rtx insn = mips16e_build_save_restore (false, &mask, &offset,
nargs, step1);
RTX_FRAME_RELATED_P (emit_insn (insn)) = 1;
mips_frame_barrier ();
size -= step1;
/* Check if we need to save other registers. */
for (regno = GP_REG_FIRST; regno < GP_REG_LAST; regno++)
if (BITSET_P (mask, regno - GP_REG_FIRST))
{
offset -= UNITS_PER_WORD;
mips_save_restore_reg (word_mode, regno,
offset, mips_save_reg);
}
}
else
{
if (cfun->machine->interrupt_handler_p)
{
HOST_WIDE_INT offset;
rtx mem;
/* If this interrupt is using a shadow register set, we need to
get the stack pointer from the previous register set. */
if (cfun->machine->use_shadow_register_set == SHADOW_SET_YES)
emit_insn (PMODE_INSN (gen_mips_rdpgpr, (stack_pointer_rtx,
stack_pointer_rtx)));
if (!cfun->machine->keep_interrupts_masked_p)
{
if (cfun->machine->int_mask == INT_MASK_EIC)
/* Move from COP0 Cause to K0. */
emit_insn (gen_cop0_move (gen_rtx_REG (SImode, K0_REG_NUM),
gen_rtx_REG (SImode, COP0_CAUSE_REG_NUM)));
}
/* Move from COP0 EPC to K1. */
emit_insn (gen_cop0_move (gen_rtx_REG (SImode, K1_REG_NUM),
gen_rtx_REG (SImode,
COP0_EPC_REG_NUM)));
/* Allocate the first part of the frame. */
rtx insn = gen_add3_insn (stack_pointer_rtx, stack_pointer_rtx,
GEN_INT (-step1));
RTX_FRAME_RELATED_P (emit_insn (insn)) = 1;
mips_frame_barrier ();
size -= step1;
/* Start at the uppermost location for saving. */
offset = frame->cop0_sp_offset - size;
/* Push EPC into its stack slot. */
mem = gen_frame_mem (word_mode,
plus_constant (Pmode, stack_pointer_rtx,
offset));
mips_emit_move (mem, gen_rtx_REG (word_mode, K1_REG_NUM));
offset -= UNITS_PER_WORD;
/* Move from COP0 Status to K1. */
emit_insn (gen_cop0_move (gen_rtx_REG (SImode, K1_REG_NUM),
gen_rtx_REG (SImode,
COP0_STATUS_REG_NUM)));
/* Right justify the RIPL in k0. */
if (!cfun->machine->keep_interrupts_masked_p
&& cfun->machine->int_mask == INT_MASK_EIC)
emit_insn (gen_lshrsi3 (gen_rtx_REG (SImode, K0_REG_NUM),
gen_rtx_REG (SImode, K0_REG_NUM),
GEN_INT (CAUSE_IPL)));
/* Push Status into its stack slot. */
mem = gen_frame_mem (word_mode,
plus_constant (Pmode, stack_pointer_rtx,
offset));
mips_emit_move (mem, gen_rtx_REG (word_mode, K1_REG_NUM));
offset -= UNITS_PER_WORD;
/* Insert the RIPL into our copy of SR (k1) as the new IPL. */
if (!cfun->machine->keep_interrupts_masked_p
&& cfun->machine->int_mask == INT_MASK_EIC)
emit_insn (gen_insvsi (gen_rtx_REG (SImode, K1_REG_NUM),
GEN_INT (6),
GEN_INT (SR_IPL),
gen_rtx_REG (SImode, K0_REG_NUM)));
/* Clear all interrupt mask bits up to and including the
handler's interrupt line. */
if (!cfun->machine->keep_interrupts_masked_p
&& cfun->machine->int_mask != INT_MASK_EIC)
emit_insn (gen_insvsi (gen_rtx_REG (SImode, K1_REG_NUM),
GEN_INT (cfun->machine->int_mask + 1),
GEN_INT (SR_IM0),
gen_rtx_REG (SImode, GP_REG_FIRST)));
if (!cfun->machine->keep_interrupts_masked_p)
/* Enable interrupts by clearing the KSU ERL and EXL bits.
IE is already the correct value, so we don't have to do
anything explicit. */
emit_insn (gen_insvsi (gen_rtx_REG (SImode, K1_REG_NUM),
GEN_INT (4),
GEN_INT (SR_EXL),
gen_rtx_REG (SImode, GP_REG_FIRST)));
else
/* Disable interrupts by clearing the KSU, ERL, EXL,
and IE bits. */
emit_insn (gen_insvsi (gen_rtx_REG (SImode, K1_REG_NUM),
GEN_INT (5),
GEN_INT (SR_IE),
gen_rtx_REG (SImode, GP_REG_FIRST)));
if (TARGET_HARD_FLOAT)
/* Disable COP1 for hard-float. This will lead to an exception
if floating-point code is executed in an ISR. */
emit_insn (gen_insvsi (gen_rtx_REG (SImode, K1_REG_NUM),
GEN_INT (1),
GEN_INT (SR_COP1),
gen_rtx_REG (SImode, GP_REG_FIRST)));
}
else
{
if (step1 != 0)
{
rtx insn = gen_add3_insn (stack_pointer_rtx,
stack_pointer_rtx,
GEN_INT (-step1));
RTX_FRAME_RELATED_P (emit_insn (insn)) = 1;
mips_frame_barrier ();
size -= step1;
}
}
mips_for_each_saved_acc (size, mips_save_reg);
mips_for_each_saved_gpr_and_fpr (size, mips_save_reg);
}
}
/* Allocate the rest of the frame. */
if (size > 0)
{
if (SMALL_OPERAND (-size))
RTX_FRAME_RELATED_P (emit_insn (gen_add3_insn (stack_pointer_rtx,
stack_pointer_rtx,
GEN_INT (-size)))) = 1;
else
{
mips_emit_move (MIPS_PROLOGUE_TEMP (Pmode), GEN_INT (size));
if (TARGET_MIPS16)
{
/* There are no instructions to add or subtract registers
from the stack pointer, so use the frame pointer as a
temporary. We should always be using a frame pointer
in this case anyway. */
gcc_assert (frame_pointer_needed);
mips_emit_move (hard_frame_pointer_rtx, stack_pointer_rtx);
emit_insn (gen_sub3_insn (hard_frame_pointer_rtx,
hard_frame_pointer_rtx,
MIPS_PROLOGUE_TEMP (Pmode)));
mips_emit_move (stack_pointer_rtx, hard_frame_pointer_rtx);
}
else
emit_insn (gen_sub3_insn (stack_pointer_rtx,
stack_pointer_rtx,
MIPS_PROLOGUE_TEMP (Pmode)));
/* Describe the combined effect of the previous instructions. */
mips_set_frame_expr
(gen_rtx_SET (stack_pointer_rtx,
plus_constant (Pmode, stack_pointer_rtx, -size)));
}
mips_frame_barrier ();
}
/* Set up the frame pointer, if we're using one. */
if (frame_pointer_needed)
{
HOST_WIDE_INT offset;
offset = frame->hard_frame_pointer_offset;
if (offset == 0)
{
rtx insn = mips_emit_move (hard_frame_pointer_rtx, stack_pointer_rtx);
RTX_FRAME_RELATED_P (insn) = 1;
}
else if (SMALL_OPERAND (offset))
{
rtx insn = gen_add3_insn (hard_frame_pointer_rtx,
stack_pointer_rtx, GEN_INT (offset));
RTX_FRAME_RELATED_P (emit_insn (insn)) = 1;
}
else
{
mips_emit_move (MIPS_PROLOGUE_TEMP (Pmode), GEN_INT (offset));
mips_emit_move (hard_frame_pointer_rtx, stack_pointer_rtx);
emit_insn (gen_add3_insn (hard_frame_pointer_rtx,
hard_frame_pointer_rtx,
MIPS_PROLOGUE_TEMP (Pmode)));
mips_set_frame_expr
(gen_rtx_SET (hard_frame_pointer_rtx,
plus_constant (Pmode, stack_pointer_rtx, offset)));
}
}
mips_emit_loadgp ();
/* Initialize the $gp save slot. */
if (mips_cfun_has_cprestore_slot_p ())
{
rtx base, mem, gp, temp;
HOST_WIDE_INT offset;
mips_get_cprestore_base_and_offset (&base, &offset, false);
mem = gen_frame_mem (Pmode, plus_constant (Pmode, base, offset));
gp = TARGET_MIPS16 ? MIPS16_PIC_TEMP : pic_offset_table_rtx;
temp = (SMALL_OPERAND (offset)
? gen_rtx_SCRATCH (Pmode)
: MIPS_PROLOGUE_TEMP (Pmode));
emit_insn (PMODE_INSN (gen_potential_cprestore,
(mem, GEN_INT (offset), gp, temp)));
mips_get_cprestore_base_and_offset (&base, &offset, true);
mem = gen_frame_mem (Pmode, plus_constant (Pmode, base, offset));
emit_insn (PMODE_INSN (gen_use_cprestore, (mem)));
}
/* We need to search back to the last use of K0 or K1. */
if (cfun->machine->interrupt_handler_p)
{
rtx_insn *insn;
for (insn = get_last_insn (); insn != NULL_RTX; insn = PREV_INSN (insn))
if (INSN_P (insn)
&& mips_refers_to_kernel_reg_p (PATTERN (insn)))
break;
/* Emit a move from K1 to COP0 Status after insn. */
gcc_assert (insn != NULL_RTX);
emit_insn_after (gen_cop0_move (gen_rtx_REG (SImode, COP0_STATUS_REG_NUM),
gen_rtx_REG (SImode, K1_REG_NUM)),
insn);
}
/* If we are profiling, make sure no instructions are scheduled before
the call to mcount. */
if (crtl->profile)
emit_insn (gen_blockage ());
}
/* Attach all pending register saves to the previous instruction.
Return that instruction. */
static rtx_insn *
mips_epilogue_emit_cfa_restores (void)
{
rtx_insn *insn;
insn = get_last_insn ();
if (mips_epilogue.cfa_restores)
{
gcc_assert (insn && !REG_NOTES (insn));
RTX_FRAME_RELATED_P (insn) = 1;
REG_NOTES (insn) = mips_epilogue.cfa_restores;
mips_epilogue.cfa_restores = 0;
}
return insn;
}
/* Like mips_epilogue_emit_cfa_restores, but also record that the CFA is
now at REG + OFFSET. */
static void
mips_epilogue_set_cfa (rtx reg, HOST_WIDE_INT offset)
{
rtx_insn *insn;
insn = mips_epilogue_emit_cfa_restores ();
if (reg != mips_epilogue.cfa_reg || offset != mips_epilogue.cfa_offset)
{
RTX_FRAME_RELATED_P (insn) = 1;
REG_NOTES (insn) = alloc_reg_note (REG_CFA_DEF_CFA,
plus_constant (Pmode, reg, offset),
REG_NOTES (insn));
mips_epilogue.cfa_reg = reg;
mips_epilogue.cfa_offset = offset;
}
}
/* Emit instructions to restore register REG from slot MEM. Also update
the cfa_restores list. */
static void
mips_restore_reg (rtx reg, rtx mem)
{
/* There's no MIPS16 instruction to load $31 directly. Load into
$7 instead and adjust the return insn appropriately. */
if (TARGET_MIPS16 && REGNO (reg) == RETURN_ADDR_REGNUM)
reg = gen_rtx_REG (GET_MODE (reg), GP_REG_FIRST + 7);
else if (GET_MODE (reg) == DFmode
&& (!TARGET_FLOAT64
|| mips_abi == ABI_32))
{
mips_add_cfa_restore (mips_subword (reg, true));
mips_add_cfa_restore (mips_subword (reg, false));
}
else
mips_add_cfa_restore (reg);
mips_emit_save_slot_move (reg, mem, MIPS_EPILOGUE_TEMP (GET_MODE (reg)));
if (REGNO (reg) == REGNO (mips_epilogue.cfa_reg))
/* The CFA is currently defined in terms of the register whose
value we have just restored. Redefine the CFA in terms of
the stack pointer. */
mips_epilogue_set_cfa (stack_pointer_rtx,
mips_epilogue.cfa_restore_sp_offset);
}
/* Emit code to set the stack pointer to BASE + OFFSET, given that
BASE + OFFSET is NEW_FRAME_SIZE bytes below the top of the frame.
BASE, if not the stack pointer, is available as a temporary. */
static void
mips_deallocate_stack (rtx base, rtx offset, HOST_WIDE_INT new_frame_size)
{
if (base == stack_pointer_rtx && offset == const0_rtx)
return;
mips_frame_barrier ();
if (offset == const0_rtx)
{
emit_move_insn (stack_pointer_rtx, base);
mips_epilogue_set_cfa (stack_pointer_rtx, new_frame_size);
}
else if (TARGET_MIPS16 && base != stack_pointer_rtx)
{
emit_insn (gen_add3_insn (base, base, offset));
mips_epilogue_set_cfa (base, new_frame_size);
emit_move_insn (stack_pointer_rtx, base);
}
else
{
emit_insn (gen_add3_insn (stack_pointer_rtx, base, offset));
mips_epilogue_set_cfa (stack_pointer_rtx, new_frame_size);
}
}
/* Emit any instructions needed before a return. */
void
mips_expand_before_return (void)
{
/* When using a call-clobbered gp, we start out with unified call
insns that include instructions to restore the gp. We then split
these unified calls after reload. These split calls explicitly
clobber gp, so there is no need to define
PIC_OFFSET_TABLE_REG_CALL_CLOBBERED.
For consistency, we should also insert an explicit clobber of $28
before return insns, so that the post-reload optimizers know that
the register is not live on exit. */
if (TARGET_CALL_CLOBBERED_GP)
emit_clobber (pic_offset_table_rtx);
}
/* Expand an "epilogue" or "sibcall_epilogue" pattern; SIBCALL_P
says which. */
void
mips_expand_epilogue (bool sibcall_p)
{
const struct mips_frame_info *frame;
HOST_WIDE_INT step1, step2;
rtx base, adjust;
rtx_insn *insn;
bool use_jraddiusp_p = false;
if (!sibcall_p && mips_can_use_return_insn ())
{
emit_jump_insn (gen_return ());
return;
}
/* In MIPS16 mode, if the return value should go into a floating-point
register, we need to call a helper routine to copy it over. */
if (mips16_cfun_returns_in_fpr_p ())
mips16_copy_fpr_return_value ();
/* Split the frame into two. STEP1 is the amount of stack we should
deallocate before restoring the registers. STEP2 is the amount we
should deallocate afterwards.
Start off by assuming that no registers need to be restored. */
frame = &cfun->machine->frame;
step1 = frame->total_size;
step2 = 0;
/* Work out which register holds the frame address. */
if (!frame_pointer_needed)
base = stack_pointer_rtx;
else
{
base = hard_frame_pointer_rtx;
step1 -= frame->hard_frame_pointer_offset;
}
mips_epilogue.cfa_reg = base;
mips_epilogue.cfa_offset = step1;
mips_epilogue.cfa_restores = NULL_RTX;
/* If we need to restore registers, deallocate as much stack as
possible in the second step without going out of range. */
if ((frame->mask | frame->fmask | frame->acc_mask) != 0
|| frame->num_cop0_regs > 0)
{
step2 = MIN (step1, MIPS_MAX_FIRST_STACK_STEP);
step1 -= step2;
}
/* Get an rtx for STEP1 that we can add to BASE. */
adjust = GEN_INT (step1);
if (!SMALL_OPERAND (step1))
{
mips_emit_move (MIPS_EPILOGUE_TEMP (Pmode), adjust);
adjust = MIPS_EPILOGUE_TEMP (Pmode);
}
mips_deallocate_stack (base, adjust, step2);
/* If we're using addressing macros, $gp is implicitly used by all
SYMBOL_REFs. We must emit a blockage insn before restoring $gp
from the stack. */
if (TARGET_CALL_SAVED_GP && !TARGET_EXPLICIT_RELOCS)
emit_insn (gen_blockage ());
mips_epilogue.cfa_restore_sp_offset = step2;
if (GENERATE_MIPS16E_SAVE_RESTORE && frame->mask != 0)
{
unsigned int regno, mask;
HOST_WIDE_INT offset;
rtx restore;
/* Generate the restore instruction. */
mask = frame->mask;
restore = mips16e_build_save_restore (true, &mask, &offset, 0, step2);
/* Restore any other registers manually. */
for (regno = GP_REG_FIRST; regno < GP_REG_LAST; regno++)
if (BITSET_P (mask, regno - GP_REG_FIRST))
{
offset -= UNITS_PER_WORD;
mips_save_restore_reg (word_mode, regno, offset, mips_restore_reg);
}
/* Restore the remaining registers and deallocate the final bit
of the frame. */
mips_frame_barrier ();
emit_insn (restore);
mips_epilogue_set_cfa (stack_pointer_rtx, 0);
}
else
{
/* Restore the registers. */
mips_for_each_saved_acc (frame->total_size - step2, mips_restore_reg);
mips_for_each_saved_gpr_and_fpr (frame->total_size - step2,
mips_restore_reg);
if (cfun->machine->interrupt_handler_p)
{
HOST_WIDE_INT offset;
rtx mem;
offset = frame->cop0_sp_offset - (frame->total_size - step2);
/* Restore the original EPC. */
mem = gen_frame_mem (word_mode,
plus_constant (Pmode, stack_pointer_rtx,
offset));
mips_emit_move (gen_rtx_REG (word_mode, K1_REG_NUM), mem);
offset -= UNITS_PER_WORD;
/* Move to COP0 EPC. */
emit_insn (gen_cop0_move (gen_rtx_REG (SImode, COP0_EPC_REG_NUM),
gen_rtx_REG (SImode, K1_REG_NUM)));
/* Restore the original Status. */
mem = gen_frame_mem (word_mode,
plus_constant (Pmode, stack_pointer_rtx,
offset));
mips_emit_move (gen_rtx_REG (word_mode, K1_REG_NUM), mem);
offset -= UNITS_PER_WORD;
/* If we don't use shadow register set, we need to update SP. */
if (cfun->machine->use_shadow_register_set == SHADOW_SET_NO)
mips_deallocate_stack (stack_pointer_rtx, GEN_INT (step2), 0);
else
/* The choice of position is somewhat arbitrary in this case. */
mips_epilogue_emit_cfa_restores ();
/* Move to COP0 Status. */
emit_insn (gen_cop0_move (gen_rtx_REG (SImode, COP0_STATUS_REG_NUM),
gen_rtx_REG (SImode, K1_REG_NUM)));
}
else if (TARGET_MICROMIPS
&& !crtl->calls_eh_return
&& !sibcall_p
&& step2 > 0
&& mips_unsigned_immediate_p (step2, 5, 2))
use_jraddiusp_p = true;
else
/* Deallocate the final bit of the frame. */
mips_deallocate_stack (stack_pointer_rtx, GEN_INT (step2), 0);
}
if (cfun->machine->use_frame_header_for_callee_saved_regs)
mips_epilogue_emit_cfa_restores ();
else if (!use_jraddiusp_p)
gcc_assert (!mips_epilogue.cfa_restores);
/* Add in the __builtin_eh_return stack adjustment. We need to
use a temporary in MIPS16 code. */
if (crtl->calls_eh_return)
{
if (TARGET_MIPS16)
{
mips_emit_move (MIPS_EPILOGUE_TEMP (Pmode), stack_pointer_rtx);
emit_insn (gen_add3_insn (MIPS_EPILOGUE_TEMP (Pmode),
MIPS_EPILOGUE_TEMP (Pmode),
EH_RETURN_STACKADJ_RTX));
mips_emit_move (stack_pointer_rtx, MIPS_EPILOGUE_TEMP (Pmode));
}
else
emit_insn (gen_add3_insn (stack_pointer_rtx,
stack_pointer_rtx,
EH_RETURN_STACKADJ_RTX));
}
if (!sibcall_p)
{
mips_expand_before_return ();
if (cfun->machine->interrupt_handler_p)
{
/* Interrupt handlers generate eret or deret. */
if (cfun->machine->use_debug_exception_return_p)
emit_jump_insn (gen_mips_deret ());
else
emit_jump_insn (gen_mips_eret ());
}
else
{
rtx pat;
/* When generating MIPS16 code, the normal
mips_for_each_saved_gpr_and_fpr path will restore the return
address into $7 rather than $31. */
if (TARGET_MIPS16
&& !GENERATE_MIPS16E_SAVE_RESTORE
&& BITSET_P (frame->mask, RETURN_ADDR_REGNUM))
{
/* simple_returns cannot rely on values that are only available
on paths through the epilogue (because return paths that do
not pass through the epilogue may nevertheless reuse a
simple_return that occurs at the end of the epilogue).
Use a normal return here instead. */
rtx reg = gen_rtx_REG (Pmode, GP_REG_FIRST + 7);
pat = gen_return_internal (reg);
}
else if (use_jraddiusp_p)
pat = gen_jraddiusp (GEN_INT (step2));
else
{
rtx reg = gen_rtx_REG (Pmode, RETURN_ADDR_REGNUM);
pat = gen_simple_return_internal (reg);
}
emit_jump_insn (pat);
if (use_jraddiusp_p)
mips_epilogue_set_cfa (stack_pointer_rtx, step2);
}
}
/* Search from the beginning to the first use of K0 or K1. */
if (cfun->machine->interrupt_handler_p
&& !cfun->machine->keep_interrupts_masked_p)
{
for (insn = get_insns (); insn != NULL_RTX; insn = NEXT_INSN (insn))
if (INSN_P (insn)
&& mips_refers_to_kernel_reg_p (PATTERN (insn)))
break;
gcc_assert (insn != NULL_RTX);
/* Insert disable interrupts before the first use of K0 or K1. */
emit_insn_before (gen_mips_di (), insn);
emit_insn_before (gen_mips_ehb (), insn);
}
}
/* Return nonzero if this function is known to have a null epilogue.
This allows the optimizer to omit jumps to jumps if no stack
was created. */
bool
mips_can_use_return_insn (void)
{
/* Interrupt handlers need to go through the epilogue. */
if (cfun->machine->interrupt_handler_p)
return false;
if (!reload_completed)
return false;
if (crtl->profile)
return false;
/* In MIPS16 mode, a function that returns a floating-point value
needs to arrange to copy the return value into the floating-point
registers. */
if (mips16_cfun_returns_in_fpr_p ())
return false;
return (cfun->machine->frame.total_size == 0
&& !cfun->machine->use_frame_header_for_callee_saved_regs);
}
/* Return true if register REGNO can store a value of mode MODE.
The result of this function is cached in mips_hard_regno_mode_ok. */
static bool
mips_hard_regno_mode_ok_uncached (unsigned int regno, machine_mode mode)
{
unsigned int size;
enum mode_class mclass;
if (mode == CCV2mode)
return (ISA_HAS_8CC
&& ST_REG_P (regno)
&& (regno - ST_REG_FIRST) % 2 == 0);
if (mode == CCV4mode)
return (ISA_HAS_8CC
&& ST_REG_P (regno)
&& (regno - ST_REG_FIRST) % 4 == 0);
if (mode == CCmode)
return ISA_HAS_8CC ? ST_REG_P (regno) : regno == FPSW_REGNUM;
size = GET_MODE_SIZE (mode);
mclass = GET_MODE_CLASS (mode);
if (GP_REG_P (regno) && mode != CCFmode && !MSA_SUPPORTED_MODE_P (mode))
return ((regno - GP_REG_FIRST) & 1) == 0 || size <= UNITS_PER_WORD;
/* For MSA, allow TImode and 128-bit vector modes in all FPR. */
if (FP_REG_P (regno) && MSA_SUPPORTED_MODE_P (mode))
return true;
if (FP_REG_P (regno)
&& (((regno - FP_REG_FIRST) % MAX_FPRS_PER_FMT) == 0
|| (MIN_FPRS_PER_FMT == 1 && size <= UNITS_PER_FPREG)))
{
/* Deny use of odd-numbered registers for 32-bit data for
the o32 FP64A ABI. */
if (TARGET_O32_FP64A_ABI && size <= 4 && (regno & 1) != 0)
return false;
/* The FPXX ABI requires double-precision values to be placed in
even-numbered registers. Disallow odd-numbered registers with
CCFmode because CCFmode double-precision compares will write a
64-bit value to a register. */
if (mode == CCFmode)
return !(TARGET_FLOATXX && (regno & 1) != 0);
/* Allow 64-bit vector modes for Loongson MultiMedia extensions
Instructions (MMI). */
if (TARGET_LOONGSON_MMI
&& (mode == V2SImode
|| mode == V4HImode
|| mode == V8QImode
|| mode == DImode))
return true;
if (mclass == MODE_FLOAT
|| mclass == MODE_COMPLEX_FLOAT
|| mclass == MODE_VECTOR_FLOAT)
return size <= UNITS_PER_FPVALUE;
/* Allow integer modes that fit into a single register. We need
to put integers into FPRs when using instructions like CVT
and TRUNC. There's no point allowing sizes smaller than a word,
because the FPU has no appropriate load/store instructions. */
if (mclass == MODE_INT)
return size >= MIN_UNITS_PER_WORD && size <= UNITS_PER_FPREG;
}
/* Don't allow vector modes in accumulators. */
if (ACC_REG_P (regno)
&& !VECTOR_MODE_P (mode)
&& (INTEGRAL_MODE_P (mode) || ALL_FIXED_POINT_MODE_P (mode)))
{
if (MD_REG_P (regno))
{
/* After a multiplication or division, clobbering HI makes
the value of LO unpredictable, and vice versa. This means
that, for all interesting cases, HI and LO are effectively
a single register.
We model this by requiring that any value that uses HI
also uses LO. */
if (size <= UNITS_PER_WORD * 2)
return regno == (size <= UNITS_PER_WORD ? LO_REGNUM : MD_REG_FIRST);
}
else
{
/* DSP accumulators do not have the same restrictions as
HI and LO, so we can treat them as normal doubleword
registers. */
if (size <= UNITS_PER_WORD)
return true;
if (size <= UNITS_PER_WORD * 2
&& ((regno - DSP_ACC_REG_FIRST) & 1) == 0)
return true;
}
}
if (ALL_COP_REG_P (regno))
return mclass == MODE_INT && size <= UNITS_PER_WORD;
if (regno == GOT_VERSION_REGNUM)
return mode == SImode;
return false;
}
/* Implement TARGET_HARD_REGNO_MODE_OK. */
static bool
mips_hard_regno_mode_ok (unsigned int regno, machine_mode mode)
{
return mips_hard_regno_mode_ok_p[mode][regno];
}
/* Return nonzero if register OLD_REG can be renamed to register NEW_REG. */
bool
mips_hard_regno_rename_ok (unsigned int old_reg ATTRIBUTE_UNUSED,
unsigned int new_reg)
{
/* Interrupt functions can only use registers that have already been
saved by the prologue, even if they would normally be call-clobbered. */
if (cfun->machine->interrupt_handler_p && !df_regs_ever_live_p (new_reg))
return false;
return true;
}
/* Return nonzero if register REGNO can be used as a scratch register
in peephole2. */
bool
mips_hard_regno_scratch_ok (unsigned int regno)
{
/* See mips_hard_regno_rename_ok. */
if (cfun->machine->interrupt_handler_p && !df_regs_ever_live_p (regno))
return false;
return true;
}
/* Implement TARGET_HARD_REGNO_CALL_PART_CLOBBERED. Odd-numbered
single-precision registers are not considered callee-saved for o32
FPXX as they will be clobbered when run on an FR=1 FPU. MSA vector
registers with MODE > 64 bits are part clobbered too. */
static bool
mips_hard_regno_call_part_clobbered (unsigned int, unsigned int regno,
machine_mode mode)
{
if (TARGET_FLOATXX
&& hard_regno_nregs (regno, mode) == 1
&& FP_REG_P (regno)
&& (regno & 1) != 0)
return true;
if (ISA_HAS_MSA && FP_REG_P (regno) && GET_MODE_SIZE (mode) > 8)
return true;
return false;
}
/* Implement TARGET_HARD_REGNO_NREGS. */
static unsigned int
mips_hard_regno_nregs (unsigned int regno, machine_mode mode)
{
if (ST_REG_P (regno))
/* The size of FP status registers is always 4, because they only hold
CCmode values, and CCmode is always considered to be 4 bytes wide. */
return (GET_MODE_SIZE (mode) + 3) / 4;
if (FP_REG_P (regno))
{
if (MSA_SUPPORTED_MODE_P (mode))
return 1;
return (GET_MODE_SIZE (mode) + UNITS_PER_FPREG - 1) / UNITS_PER_FPREG;
}
/* All other registers are word-sized. */
return (GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
}
/* Implement CLASS_MAX_NREGS, taking the maximum of the cases
in mips_hard_regno_nregs. */
int
mips_class_max_nregs (enum reg_class rclass, machine_mode mode)
{
int size;
HARD_REG_SET left;
size = 0x8000;
left = reg_class_contents[rclass];
if (hard_reg_set_intersect_p (left, reg_class_contents[(int) ST_REGS]))
{
if (mips_hard_regno_mode_ok (ST_REG_FIRST, mode))
size = MIN (size, 4);
left &= ~reg_class_contents[ST_REGS];
}
if (hard_reg_set_intersect_p (left, reg_class_contents[(int) FP_REGS]))
{
if (mips_hard_regno_mode_ok (FP_REG_FIRST, mode))
{
if (MSA_SUPPORTED_MODE_P (mode))
size = MIN (size, UNITS_PER_MSA_REG);
else
size = MIN (size, UNITS_PER_FPREG);
}
left &= ~reg_class_contents[FP_REGS];
}
if (!hard_reg_set_empty_p (left))
size = MIN (size, UNITS_PER_WORD);
return (GET_MODE_SIZE (mode) + size - 1) / size;
}
/* Implement TARGET_CAN_CHANGE_MODE_CLASS. */
static bool
mips_can_change_mode_class (machine_mode from,
machine_mode to, reg_class_t rclass)
{
/* Allow conversions between different Loongson integer vectors,
and between those vectors and DImode. */
if (GET_MODE_SIZE (from) == 8 && GET_MODE_SIZE (to) == 8
&& INTEGRAL_MODE_P (from) && INTEGRAL_MODE_P (to))
return true;
/* Allow conversions between different MSA vector modes. */
if (MSA_SUPPORTED_MODE_P (from) && MSA_SUPPORTED_MODE_P (to))
return true;
/* Otherwise, there are several problems with changing the modes of
values in floating-point registers:
- When a multi-word value is stored in paired floating-point
registers, the first register always holds the low word. We
therefore can't allow FPRs to change between single-word and
multi-word modes on big-endian targets.
- GCC assumes that each word of a multiword register can be
accessed individually using SUBREGs. This is not true for
floating-point registers if they are bigger than a word.
- Loading a 32-bit value into a 64-bit floating-point register
will not sign-extend the value, despite what LOAD_EXTEND_OP
says. We can't allow FPRs to change from SImode to a wider
mode on 64-bit targets.
- If the FPU has already interpreted a value in one format, we
must not ask it to treat the value as having a different
format.
We therefore disallow all mode changes involving FPRs. */
return !reg_classes_intersect_p (FP_REGS, rclass);
}
/* Implement target hook small_register_classes_for_mode_p. */
static bool
mips_small_register_classes_for_mode_p (machine_mode mode
ATTRIBUTE_UNUSED)
{
return TARGET_MIPS16;
}
/* Return true if moves in mode MODE can use the FPU's mov.fmt instruction,
or use the MSA's move.v instruction. */
static bool
mips_mode_ok_for_mov_fmt_p (machine_mode mode)
{
switch (mode)
{
case E_CCFmode:
case E_SFmode:
return TARGET_HARD_FLOAT;
case E_DFmode:
return TARGET_HARD_FLOAT && TARGET_DOUBLE_FLOAT;
case E_V2SFmode:
return TARGET_HARD_FLOAT && TARGET_PAIRED_SINGLE_FLOAT;
default:
return MSA_SUPPORTED_MODE_P (mode);
}
}
/* Implement TARGET_MODES_TIEABLE_P. */
static bool
mips_modes_tieable_p (machine_mode mode1, machine_mode mode2)
{
/* FPRs allow no mode punning, so it's not worth tying modes if we'd
prefer to put one of them in FPRs. */
return (mode1 == mode2
|| (!mips_mode_ok_for_mov_fmt_p (mode1)
&& !mips_mode_ok_for_mov_fmt_p (mode2)));
}
/* Implement TARGET_PREFERRED_RELOAD_CLASS. */
static reg_class_t
mips_preferred_reload_class (rtx x, reg_class_t rclass)
{
if (mips_dangerous_for_la25_p (x) && reg_class_subset_p (LEA_REGS, rclass))
return LEA_REGS;
if (reg_class_subset_p (FP_REGS, rclass)
&& mips_mode_ok_for_mov_fmt_p (GET_MODE (x)))
return FP_REGS;
if (reg_class_subset_p (GR_REGS, rclass))
rclass = GR_REGS;
if (TARGET_MIPS16 && reg_class_subset_p (M16_REGS, rclass))
rclass = M16_REGS;
return rclass;
}
/* RCLASS is a class involved in a REGISTER_MOVE_COST calculation.
Return a "canonical" class to represent it in later calculations. */
static reg_class_t
mips_canonicalize_move_class (reg_class_t rclass)
{
/* All moves involving accumulator registers have the same cost. */
if (reg_class_subset_p (rclass, ACC_REGS))
rclass = ACC_REGS;
/* Likewise promote subclasses of general registers to the most
interesting containing class. */
if (TARGET_MIPS16 && reg_class_subset_p (rclass, M16_REGS))
rclass = M16_REGS;
else if (reg_class_subset_p (rclass, GENERAL_REGS))
rclass = GENERAL_REGS;
return rclass;
}
/* Return the cost of moving a value from a register of class FROM to a GPR.
Return 0 for classes that are unions of other classes handled by this
function. */
static int
mips_move_to_gpr_cost (reg_class_t from)
{
switch (from)
{
case M16_REGS:
case GENERAL_REGS:
/* A MIPS16 MOVE instruction, or a non-MIPS16 MOVE macro. */
return 2;
case ACC_REGS:
/* MFLO and MFHI. */
return 6;
case FP_REGS:
/* MFC1, etc. */
return 4;
case COP0_REGS:
case COP2_REGS:
case COP3_REGS:
/* This choice of value is historical. */
return 5;
default:
return 0;
}
}
/* Return the cost of moving a value from a GPR to a register of class TO.
Return 0 for classes that are unions of other classes handled by this
function. */
static int
mips_move_from_gpr_cost (reg_class_t to)
{
switch (to)
{
case M16_REGS:
case GENERAL_REGS:
/* A MIPS16 MOVE instruction, or a non-MIPS16 MOVE macro. */
return 2;
case ACC_REGS:
/* MTLO and MTHI. */
return 6;
case FP_REGS:
/* MTC1, etc. */
return 4;
case COP0_REGS:
case COP2_REGS:
case COP3_REGS:
/* This choice of value is historical. */
return 5;
default:
return 0;
}
}
/* Implement TARGET_REGISTER_MOVE_COST. Return 0 for classes that are the
maximum of the move costs for subclasses; regclass will work out
the maximum for us. */
static int
mips_register_move_cost (machine_mode mode,
reg_class_t from, reg_class_t to)
{
reg_class_t dregs;
int cost1, cost2;
from = mips_canonicalize_move_class (from);
to = mips_canonicalize_move_class (to);
/* Handle moves that can be done without using general-purpose registers. */
if (from == FP_REGS)
{
if (to == FP_REGS && mips_mode_ok_for_mov_fmt_p (mode))
/* MOV.FMT. */
return 4;
}
/* Handle cases in which only one class deviates from the ideal. */
dregs = TARGET_MIPS16 ? M16_REGS : GENERAL_REGS;
if (from == dregs)
return mips_move_from_gpr_cost (to);
if (to == dregs)
return mips_move_to_gpr_cost (from);
/* Handles cases that require a GPR temporary. */
cost1 = mips_move_to_gpr_cost (from);
if (cost1 != 0)
{
cost2 = mips_move_from_gpr_cost (to);
if (cost2 != 0)
return cost1 + cost2;
}
return 0;
}
/* Implement TARGET_REGISTER_PRIORITY. */
static int
mips_register_priority (int hard_regno)
{
/* Treat MIPS16 registers with higher priority than other regs. */
if (TARGET_MIPS16
&& TEST_HARD_REG_BIT (reg_class_contents[M16_REGS], hard_regno))
return 1;
return 0;
}
/* Implement TARGET_MEMORY_MOVE_COST. */
static int
mips_memory_move_cost (machine_mode mode, reg_class_t rclass, bool in)
{
return (mips_cost->memory_latency
+ memory_move_secondary_cost (mode, rclass, in));
}
/* Implement TARGET_SECONDARY_MEMORY_NEEDED.
When targeting the o32 FPXX ABI, all moves with a length of doubleword
or greater must be performed by FR-mode-aware instructions.
This can be achieved using MFHC1/MTHC1 when these instructions are
available but otherwise moves must go via memory.
For the o32 FP64A ABI, all odd-numbered moves with a length of
doubleword or greater are required to use memory. Using MTC1/MFC1
to access the lower-half of these registers would require a forbidden
single-precision access. We require all double-word moves to use
memory because adding even and odd floating-point registers classes
would have a significant impact on the backend. */
static bool
mips_secondary_memory_needed (machine_mode mode, reg_class_t class1,
reg_class_t class2)
{
/* Ignore spilled pseudos. */
if (lra_in_progress && (class1 == NO_REGS || class2 == NO_REGS))
return false;
if (((class1 == FP_REGS) != (class2 == FP_REGS))
&& ((TARGET_FLOATXX && !ISA_HAS_MXHC1)
|| TARGET_O32_FP64A_ABI)
&& GET_MODE_SIZE (mode) >= 8)
return true;
return false;
}
/* Return the register class required for a secondary register when
copying between one of the registers in RCLASS and value X, which
has mode MODE. X is the source of the move if IN_P, otherwise it
is the destination. Return NO_REGS if no secondary register is
needed. */
enum reg_class
mips_secondary_reload_class (enum reg_class rclass,
machine_mode mode, rtx x, bool)
{
int regno;
/* If X is a constant that cannot be loaded into $25, it must be loaded
into some other GPR. No other register class allows a direct move. */
if (mips_dangerous_for_la25_p (x))
return reg_class_subset_p (rclass, LEA_REGS) ? NO_REGS : LEA_REGS;
regno = true_regnum (x);
if (TARGET_MIPS16)
{
/* In MIPS16 mode, every move must involve a member of M16_REGS. */
if (!reg_class_subset_p (rclass, M16_REGS) && !M16_REG_P (regno))
return M16_REGS;
return NO_REGS;
}
/* Copying from accumulator registers to anywhere other than a general
register requires a temporary general register. */
if (reg_class_subset_p (rclass, ACC_REGS))
return GP_REG_P (regno) ? NO_REGS : GR_REGS;
if (ACC_REG_P (regno))
return reg_class_subset_p (rclass, GR_REGS) ? NO_REGS : GR_REGS;
if (reg_class_subset_p (rclass, FP_REGS))
{
if (regno < 0
|| (MEM_P (x)
&& (GET_MODE_SIZE (mode) == 4 || GET_MODE_SIZE (mode) == 8)))
/* In this case we can use lwc1, swc1, ldc1 or sdc1. We'll use
pairs of lwc1s and swc1s if ldc1 and sdc1 are not supported. */
return NO_REGS;
if (MEM_P (x) && MSA_SUPPORTED_MODE_P (mode))
/* In this case we can use MSA LD.* and ST.*. */
return NO_REGS;
if (GP_REG_P (regno) || x == CONST0_RTX (mode))
/* In this case we can use mtc1, mfc1, dmtc1 or dmfc1. */
return NO_REGS;
if (CONSTANT_P (x) && !targetm.cannot_force_const_mem (mode, x))
/* We can force the constant to memory and use lwc1
and ldc1. As above, we will use pairs of lwc1s if
ldc1 is not supported. */
return NO_REGS;
if (FP_REG_P (regno) && mips_mode_ok_for_mov_fmt_p (mode))
/* In this case we can use mov.fmt. */
return NO_REGS;
/* Otherwise, we need to reload through an integer register. */
return GR_REGS;
}
if (FP_REG_P (regno))
return reg_class_subset_p (rclass, GR_REGS) ? NO_REGS : GR_REGS;
return NO_REGS;
}
/* Implement TARGET_MODE_REP_EXTENDED. */
static int
mips_mode_rep_extended (scalar_int_mode mode, scalar_int_mode mode_rep)
{
/* On 64-bit targets, SImode register values are sign-extended to DImode. */
if (TARGET_64BIT && mode == SImode && mode_rep == DImode)
return SIGN_EXTEND;
return UNKNOWN;
}
/* Implement TARGET_VALID_POINTER_MODE. */
static bool
mips_valid_pointer_mode (scalar_int_mode mode)
{
return mode == SImode || (TARGET_64BIT && mode == DImode);
}
/* Implement TARGET_VECTOR_MODE_SUPPORTED_P. */
static bool
mips_vector_mode_supported_p (machine_mode mode)
{
switch (mode)
{
case E_V2SFmode:
return TARGET_PAIRED_SINGLE_FLOAT;
case E_V2HImode:
case E_V4QImode:
case E_V2HQmode:
case E_V2UHQmode:
case E_V2HAmode:
case E_V2UHAmode:
case E_V4QQmode:
case E_V4UQQmode:
return TARGET_DSP;
case E_V2SImode:
case E_V4HImode:
case E_V8QImode:
return TARGET_LOONGSON_MMI;
default:
return MSA_SUPPORTED_MODE_P (mode);
}
}
/* Implement TARGET_SCALAR_MODE_SUPPORTED_P. */
static bool
mips_scalar_mode_supported_p (scalar_mode mode)
{
if (ALL_FIXED_POINT_MODE_P (mode)
&& GET_MODE_PRECISION (mode) <= 2 * BITS_PER_WORD)
return true;
return default_scalar_mode_supported_p (mode);
}
/* Implement TARGET_VECTORIZE_PREFERRED_SIMD_MODE. */
static machine_mode
mips_preferred_simd_mode (scalar_mode mode)
{
if (TARGET_PAIRED_SINGLE_FLOAT
&& mode == SFmode)
return V2SFmode;
if (!ISA_HAS_MSA)
return word_mode;
switch (mode)
{
case E_QImode:
return V16QImode;
case E_HImode:
return V8HImode;
case E_SImode:
return V4SImode;
case E_DImode:
return V2DImode;
case E_SFmode:
return V4SFmode;
case E_DFmode:
return V2DFmode;
default:
break;
}
return word_mode;
}
/* Implement TARGET_VECTORIZE_AUTOVECTORIZE_VECTOR_MODES. */
static unsigned int
mips_autovectorize_vector_modes (vector_modes *modes, bool)
{
if (ISA_HAS_MSA)
modes->safe_push (V16QImode);
return 0;
}
/* Implement TARGET_INIT_LIBFUNCS. */
static void
mips_init_libfuncs (void)
{
if (TARGET_FIX_VR4120)
{
/* Register the special divsi3 and modsi3 functions needed to work
around VR4120 division errata. */
set_optab_libfunc (sdiv_optab, SImode, "__vr4120_divsi3");
set_optab_libfunc (smod_optab, SImode, "__vr4120_modsi3");
}
if (TARGET_MIPS16 && TARGET_HARD_FLOAT_ABI)
{
/* Register the MIPS16 -mhard-float stubs. */
set_optab_libfunc (add_optab, SFmode, "__mips16_addsf3");
set_optab_libfunc (sub_optab, SFmode, "__mips16_subsf3");
set_optab_libfunc (smul_optab, SFmode, "__mips16_mulsf3");
set_optab_libfunc (sdiv_optab, SFmode, "__mips16_divsf3");
set_optab_libfunc (eq_optab, SFmode, "__mips16_eqsf2");
set_optab_libfunc (ne_optab, SFmode, "__mips16_nesf2");
set_optab_libfunc (gt_optab, SFmode, "__mips16_gtsf2");
set_optab_libfunc (ge_optab, SFmode, "__mips16_gesf2");
set_optab_libfunc (lt_optab, SFmode, "__mips16_ltsf2");
set_optab_libfunc (le_optab, SFmode, "__mips16_lesf2");
set_optab_libfunc (unord_optab, SFmode, "__mips16_unordsf2");
set_conv_libfunc (sfix_optab, SImode, SFmode, "__mips16_fix_truncsfsi");
set_conv_libfunc (sfloat_optab, SFmode, SImode, "__mips16_floatsisf");
set_conv_libfunc (ufloat_optab, SFmode, SImode, "__mips16_floatunsisf");
if (TARGET_DOUBLE_FLOAT)
{
set_optab_libfunc (add_optab, DFmode, "__mips16_adddf3");
set_optab_libfunc (sub_optab, DFmode, "__mips16_subdf3");
set_optab_libfunc (smul_optab, DFmode, "__mips16_muldf3");
set_optab_libfunc (sdiv_optab, DFmode, "__mips16_divdf3");
set_optab_libfunc (eq_optab, DFmode, "__mips16_eqdf2");
set_optab_libfunc (ne_optab, DFmode, "__mips16_nedf2");
set_optab_libfunc (gt_optab, DFmode, "__mips16_gtdf2");
set_optab_libfunc (ge_optab, DFmode, "__mips16_gedf2");
set_optab_libfunc (lt_optab, DFmode, "__mips16_ltdf2");
set_optab_libfunc (le_optab, DFmode, "__mips16_ledf2");
set_optab_libfunc (unord_optab, DFmode, "__mips16_unorddf2");
set_conv_libfunc (sext_optab, DFmode, SFmode,
"__mips16_extendsfdf2");
set_conv_libfunc (trunc_optab, SFmode, DFmode,
"__mips16_truncdfsf2");
set_conv_libfunc (sfix_optab, SImode, DFmode,
"__mips16_fix_truncdfsi");
set_conv_libfunc (sfloat_optab, DFmode, SImode,
"__mips16_floatsidf");
set_conv_libfunc (ufloat_optab, DFmode, SImode,
"__mips16_floatunsidf");
}
}
/* The MIPS16 ISA does not have an encoding for "sync", so we rely
on an external non-MIPS16 routine to implement __sync_synchronize.
Similarly for the rest of the ll/sc libfuncs. */
if (TARGET_MIPS16)
{
synchronize_libfunc = init_one_libfunc ("__sync_synchronize");
init_sync_libfuncs (UNITS_PER_WORD);
}
}
/* Build up a multi-insn sequence that loads label TARGET into $AT. */
static void
mips_process_load_label (rtx target)
{
rtx base, gp, intop;
HOST_WIDE_INT offset;
mips_multi_start ();
switch (mips_abi)
{
case ABI_N32:
mips_multi_add_insn ("lw\t%@,%%got_page(%0)(%+)", target, 0);
mips_multi_add_insn ("addiu\t%@,%@,%%got_ofst(%0)", target, 0);
break;
case ABI_64:
mips_multi_add_insn ("ld\t%@,%%got_page(%0)(%+)", target, 0);
mips_multi_add_insn ("daddiu\t%@,%@,%%got_ofst(%0)", target, 0);
break;
default:
gp = pic_offset_table_rtx;
if (mips_cfun_has_cprestore_slot_p ())
{
gp = gen_rtx_REG (Pmode, AT_REGNUM);
mips_get_cprestore_base_and_offset (&base, &offset, true);
if (!SMALL_OPERAND (offset))
{
intop = GEN_INT (CONST_HIGH_PART (offset));
mips_multi_add_insn ("lui\t%0,%1", gp, intop, 0);
mips_multi_add_insn ("addu\t%0,%0,%1", gp, base, 0);
base = gp;
offset = CONST_LOW_PART (offset);
}
intop = GEN_INT (offset);
if (ISA_HAS_LOAD_DELAY)
mips_multi_add_insn ("lw\t%0,%1(%2)%#", gp, intop, base, 0);
else
mips_multi_add_insn ("lw\t%0,%1(%2)", gp, intop, base, 0);
}
if (ISA_HAS_LOAD_DELAY)
mips_multi_add_insn ("lw\t%@,%%got(%0)(%1)%#", target, gp, 0);
else
mips_multi_add_insn ("lw\t%@,%%got(%0)(%1)", target, gp, 0);
mips_multi_add_insn ("addiu\t%@,%@,%%lo(%0)", target, 0);
break;
}
}
/* Return the number of instructions needed to load a label into $AT. */
static unsigned int
mips_load_label_num_insns (void)
{
if (cfun->machine->load_label_num_insns == 0)
{
mips_process_load_label (pc_rtx);
cfun->machine->load_label_num_insns = mips_multi_num_insns;
}
return cfun->machine->load_label_num_insns;
}
/* Emit an asm sequence to start a noat block and load the address
of a label into $1. */
void
mips_output_load_label (rtx target)
{
mips_push_asm_switch (&mips_noat);
if (TARGET_EXPLICIT_RELOCS)
{
mips_process_load_label (target);
mips_multi_write ();
}
else
{
if (Pmode == DImode)
output_asm_insn ("dla\t%@,%0", &target);
else
output_asm_insn ("la\t%@,%0", &target);
}
}
/* Return the length of INSN. LENGTH is the initial length computed by
attributes in the machine-description file. */
int
mips_adjust_insn_length (rtx_insn *insn, int length)
{
/* mips.md uses MAX_PIC_BRANCH_LENGTH as a placeholder for the length
of a PIC long-branch sequence. Substitute the correct value. */
if (length == MAX_PIC_BRANCH_LENGTH
&& JUMP_P (insn)
&& INSN_CODE (insn) >= 0
&& get_attr_type (insn) == TYPE_BRANCH)
{
/* Add the branch-over instruction and its delay slot, if this
is a conditional branch. */
length = simplejump_p (insn) ? 0 : 8;
/* Add the size of a load into $AT. */
length += BASE_INSN_LENGTH * mips_load_label_num_insns ();
/* Add the length of an indirect jump, ignoring the delay slot. */
length += TARGET_COMPRESSION ? 2 : 4;
}
/* A unconditional jump has an unfilled delay slot if it is not part
of a sequence. A conditional jump normally has a delay slot, but
does not on MIPS16. */
if (CALL_P (insn) || (TARGET_MIPS16 ? simplejump_p (insn) : JUMP_P (insn)))
length += TARGET_MIPS16 ? 2 : 4;
/* See how many nops might be needed to avoid hardware hazards. */
if (!cfun->machine->ignore_hazard_length_p
&& INSN_P (insn)
&& INSN_CODE (insn) >= 0)
switch (get_attr_hazard (insn))
{
case HAZARD_NONE:
break;
case HAZARD_DELAY:
case HAZARD_FORBIDDEN_SLOT:
length += NOP_INSN_LENGTH;
break;
case HAZARD_HILO:
length += NOP_INSN_LENGTH * 2;
break;
}
return length;
}
/* Return the asm template for a call. OPERANDS are the operands, TARGET_OPNO
is the operand number of the target. SIZE_OPNO is the operand number of
the argument size operand that can optionally hold the call attributes. If
SIZE_OPNO is not -1 and the call is indirect, use the function symbol from
the call attributes to attach a R_MIPS_JALR relocation to the call. LINK_P
indicates whether the jump is a call and needs to set the link register.
When generating GOT code without explicit relocation operators, all calls
should use assembly macros. Otherwise, all indirect calls should use "jr"
or "jalr"; we will arrange to restore $gp afterwards if necessary. Finally,
we can only generate direct calls for -mabicalls by temporarily switching
to non-PIC mode.
For microMIPS jal(r), we try to generate jal(r)s when a 16-bit
instruction is in the delay slot of jal(r).
Where compact branches are available, we try to use them if the delay slot
has a NOP (or equivalently delay slots were not enabled for the instruction
anyway). */
const char *
mips_output_jump (rtx *operands, int target_opno, int size_opno, bool link_p)
{
static char buffer[300];
char *s = buffer;
bool reg_p = REG_P (operands[target_opno]);
const char *and_link = link_p ? "al" : "";
const char *reg = reg_p ? "r" : "";
const char *compact = "";
const char *nop = "%/";
const char *short_delay = link_p ? "%!" : "";
const char *insn_name = TARGET_CB_NEVER || reg_p ? "j" : "b";
/* Compact branches can only be described when the ISA has support for them
as both the compact formatter '%:' and the delay slot NOP formatter '%/'
work as a mutually exclusive pair. I.e. a NOP is never required if a
compact form is available. */
if (!final_sequence
&& (TARGET_CB_MAYBE
|| (ISA_HAS_JRC && !link_p && reg_p)))
{
compact = "c";
nop = "";
}
if (TARGET_USE_GOT && !TARGET_EXPLICIT_RELOCS)
sprintf (s, "%%*%s%s\t%%%d%%/", insn_name, and_link, target_opno);
else
{
if (!reg_p && TARGET_ABICALLS_PIC2)
s += sprintf (s, ".option\tpic0\n\t");
if (reg_p && mips_get_pic_call_symbol (operands, size_opno))
s += sprintf (s, "%%*.reloc\t1f,%s,%%%d\n1:\t",
TARGET_MICROMIPS ? "R_MICROMIPS_JALR" : "R_MIPS_JALR",
size_opno);
else
s += sprintf (s, "%%*");
s += sprintf (s, "%s%s%s%s%s\t%%%d%s",
insn_name, and_link, reg, compact, short_delay,
target_opno, nop);
if (!reg_p && TARGET_ABICALLS_PIC2)
s += sprintf (s, "\n\t.option\tpic2");
}
return buffer;
}
/* Return the assembly code for INSN, which has the operands given by
OPERANDS, and which branches to OPERANDS[0] if some condition is true.
BRANCH_IF_TRUE is the asm template that should be used if OPERANDS[0]
is in range of a direct branch. BRANCH_IF_FALSE is an inverted
version of BRANCH_IF_TRUE. */
const char *
mips_output_conditional_branch (rtx_insn *insn, rtx *operands,
const char *branch_if_true,
const char *branch_if_false)
{
unsigned int length;
rtx taken;
gcc_assert (LABEL_P (operands[0]));
length = get_attr_length (insn);
if (length <= 8)
{
/* Just a simple conditional branch. */
mips_branch_likely = (final_sequence && INSN_ANNULLED_BRANCH_P (insn));
return branch_if_true;
}
/* Generate a reversed branch around a direct jump. This fallback does
not use branch-likely instructions. */
mips_branch_likely = false;
rtx_code_label *not_taken = gen_label_rtx ();
taken = operands[0];
/* Generate the reversed branch to NOT_TAKEN. */
operands[0] = not_taken;
output_asm_insn (branch_if_false, operands);
/* If INSN has a delay slot, we must provide delay slots for both the
branch to NOT_TAKEN and the conditional jump. We must also ensure
that INSN's delay slot is executed in the appropriate cases. */
if (final_sequence)
{
/* This first delay slot will always be executed, so use INSN's
delay slot if is not annulled. */
if (!INSN_ANNULLED_BRANCH_P (insn))
{
final_scan_insn (final_sequence->insn (1),
asm_out_file, optimize, 1, NULL);
final_sequence->insn (1)->set_deleted ();
}
else
output_asm_insn ("nop", 0);
fprintf (asm_out_file, "\n");
}
/* Output the unconditional branch to TAKEN. */
if (TARGET_ABSOLUTE_JUMPS && TARGET_CB_MAYBE)
{
/* Add a hazard nop. */
if (!final_sequence)
{
output_asm_insn ("nop\t\t# hazard nop", 0);
fprintf (asm_out_file, "\n");
}
output_asm_insn (MIPS_ABSOLUTE_JUMP ("bc\t%0"), &taken);
}
else if (TARGET_ABSOLUTE_JUMPS)
output_asm_insn (MIPS_ABSOLUTE_JUMP ("j\t%0%/"), &taken);
else
{
mips_output_load_label (taken);
if (TARGET_CB_MAYBE)
output_asm_insn ("jrc\t%@%]", 0);
else
output_asm_insn ("jr\t%@%]%/", 0);
}
/* Now deal with its delay slot; see above. */
if (final_sequence)
{
/* This delay slot will only be executed if the branch is taken.
Use INSN's delay slot if is annulled. */
if (INSN_ANNULLED_BRANCH_P (insn))
{
final_scan_insn (final_sequence->insn (1),
asm_out_file, optimize, 1, NULL);
final_sequence->insn (1)->set_deleted ();
}
else if (TARGET_CB_NEVER)
output_asm_insn ("nop", 0);
fprintf (asm_out_file, "\n");
}
/* Output NOT_TAKEN. */
targetm.asm_out.internal_label (asm_out_file, "L",
CODE_LABEL_NUMBER (not_taken));
return "";
}
/* Return the assembly code for INSN, which branches to OPERANDS[0]
if some equality condition is true. The condition is given by
OPERANDS[1] if !INVERTED_P, otherwise it is the inverse of
OPERANDS[1]. OPERANDS[2] is the comparison's first operand;
OPERANDS[3] is the second operand and may be zero or a register. */
const char *
mips_output_equal_conditional_branch (rtx_insn* insn, rtx *operands,
bool inverted_p)
{
const char *branch[2];
/* For a simple BNEZ or BEQZ microMIPSr3 branch. */
if (TARGET_MICROMIPS
&& mips_isa_rev <= 5
&& operands[3] == const0_rtx
&& get_attr_length (insn) <= 8)
{
if (mips_cb == MIPS_CB_OPTIMAL)
{
branch[!inverted_p] = "%*b%C1z%:\t%2,%0";
branch[inverted_p] = "%*b%N1z%:\t%2,%0";
}
else
{
branch[!inverted_p] = "%*b%C1z\t%2,%0%/";
branch[inverted_p] = "%*b%N1z\t%2,%0%/";
}
}
else if (TARGET_CB_MAYBE)
{
if (operands[3] == const0_rtx)
{
branch[!inverted_p] = MIPS_BRANCH_C ("b%C1z", "%2,%0");
branch[inverted_p] = MIPS_BRANCH_C ("b%N1z", "%2,%0");
}
else if (REGNO (operands[2]) != REGNO (operands[3]))
{
branch[!inverted_p] = MIPS_BRANCH_C ("b%C1", "%2,%3,%0");
branch[inverted_p] = MIPS_BRANCH_C ("b%N1", "%2,%3,%0");
}
else
{
/* This case is degenerate. It should not happen, but does. */
if (GET_CODE (operands[1]) == NE)
inverted_p = !inverted_p;
branch[!inverted_p] = MIPS_BRANCH_C ("b", "%0");
branch[inverted_p] = "%*\t\t# branch never";
}
}
else
{
branch[!inverted_p] = MIPS_BRANCH ("b%C1", "%2,%z3,%0");
branch[inverted_p] = MIPS_BRANCH ("b%N1", "%2,%z3,%0");
}
return mips_output_conditional_branch (insn, operands, branch[1], branch[0]);
}
/* Return the assembly code for INSN, which branches to OPERANDS[0]
if some ordering condition is true. The condition is given by
OPERANDS[1] if !INVERTED_P, otherwise it is the inverse of
OPERANDS[1]. OPERANDS[2] is the comparison's first operand;
OPERANDS[3] is the second operand and may be zero or a register. */
const char *
mips_output_order_conditional_branch (rtx_insn *insn, rtx *operands,
bool inverted_p)
{
const char *branch[2];
/* Make BRANCH[1] branch to OPERANDS[0] when the condition is true.
Make BRANCH[0] branch on the inverse condition. */
if (operands[3] != const0_rtx)
{
/* Handle degenerate cases that should not, but do, occur. */
if (REGNO (operands[2]) == REGNO (operands[3]))
{
switch (GET_CODE (operands[1]))
{
case LT:
case LTU:
inverted_p = !inverted_p;
/* Fall through. */
case GE:
case GEU:
branch[!inverted_p] = MIPS_BRANCH_C ("b", "%0");
branch[inverted_p] = "%*\t\t# branch never";
break;
default:
gcc_unreachable ();
}
}
else
{
branch[!inverted_p] = MIPS_BRANCH_C ("b%C1", "%2,%3,%0");
branch[inverted_p] = MIPS_BRANCH_C ("b%N1", "%2,%3,%0");
}
}
else
{
switch (GET_CODE (operands[1]))
{
/* These cases are equivalent to comparisons against zero. */
case LEU:
inverted_p = !inverted_p;
/* Fall through. */
case GTU:
if (TARGET_CB_MAYBE)
{
branch[!inverted_p] = MIPS_BRANCH_C ("bnez", "%2,%0");
branch[inverted_p] = MIPS_BRANCH_C ("beqz", "%2,%0");
}
else
{
branch[!inverted_p] = MIPS_BRANCH ("bne", "%2,%.,%0");
branch[inverted_p] = MIPS_BRANCH ("beq", "%2,%.,%0");
}
break;
/* These cases are always true or always false. */
case LTU:
inverted_p = !inverted_p;
/* Fall through. */
case GEU:
if (TARGET_CB_MAYBE)
{
branch[!inverted_p] = MIPS_BRANCH_C ("b", "%0");
branch[inverted_p] = "%*\t\t# branch never";
}
else
{
branch[!inverted_p] = MIPS_BRANCH ("beq", "%.,%.,%0");
branch[inverted_p] = MIPS_BRANCH ("bne", "%.,%.,%0");
}
break;
default:
if (TARGET_CB_MAYBE)
{
branch[!inverted_p] = MIPS_BRANCH_C ("b%C1z", "%2,%0");
branch[inverted_p] = MIPS_BRANCH_C ("b%N1z", "%2,%0");
}
else
{
branch[!inverted_p] = MIPS_BRANCH ("b%C1z", "%2,%0");
branch[inverted_p] = MIPS_BRANCH ("b%N1z", "%2,%0");
}
break;
}
}
return mips_output_conditional_branch (insn, operands, branch[1], branch[0]);
}
/* Start a block of code that needs access to the LL, SC and SYNC
instructions. */
static void
mips_start_ll_sc_sync_block (void)
{
if (!ISA_HAS_LL_SC)
{
output_asm_insn (".set\tpush", 0);
if (TARGET_64BIT)
output_asm_insn (".set\tmips3", 0);
else
output_asm_insn (".set\tmips2", 0);
}
}
/* End a block started by mips_start_ll_sc_sync_block. */
static void
mips_end_ll_sc_sync_block (void)
{
if (!ISA_HAS_LL_SC)
output_asm_insn (".set\tpop", 0);
}
/* Output and/or return the asm template for a sync instruction. */
const char *
mips_output_sync (void)
{
mips_start_ll_sc_sync_block ();
output_asm_insn ("sync", 0);
mips_end_ll_sc_sync_block ();
return "";
}
/* Return the asm template associated with sync_insn1 value TYPE.
IS_64BIT_P is true if we want a 64-bit rather than 32-bit operation. */
static const char *
mips_sync_insn1_template (enum attr_sync_insn1 type, bool is_64bit_p)
{
switch (type)
{
case SYNC_INSN1_MOVE:
return "move\t%0,%z2";
case SYNC_INSN1_LI:
return "li\t%0,%2";
case SYNC_INSN1_ADDU:
return is_64bit_p ? "daddu\t%0,%1,%z2" : "addu\t%0,%1,%z2";
case SYNC_INSN1_ADDIU:
return is_64bit_p ? "daddiu\t%0,%1,%2" : "addiu\t%0,%1,%2";
case SYNC_INSN1_SUBU:
return is_64bit_p ? "dsubu\t%0,%1,%z2" : "subu\t%0,%1,%z2";
case SYNC_INSN1_AND:
return "and\t%0,%1,%z2";
case SYNC_INSN1_ANDI:
return "andi\t%0,%1,%2";
case SYNC_INSN1_OR:
return "or\t%0,%1,%z2";
case SYNC_INSN1_ORI:
return "ori\t%0,%1,%2";
case SYNC_INSN1_XOR:
return "xor\t%0,%1,%z2";
case SYNC_INSN1_XORI:
return "xori\t%0,%1,%2";
}
gcc_unreachable ();
}
/* Return the asm template associated with sync_insn2 value TYPE. */
static const char *
mips_sync_insn2_template (enum attr_sync_insn2 type)
{
switch (type)
{
case SYNC_INSN2_NOP:
gcc_unreachable ();
case SYNC_INSN2_AND:
return "and\t%0,%1,%z2";
case SYNC_INSN2_XOR:
return "xor\t%0,%1,%z2";
case SYNC_INSN2_NOT:
return "nor\t%0,%1,%.";
}
gcc_unreachable ();
}
/* OPERANDS are the operands to a sync loop instruction and INDEX is
the value of the one of the sync_* attributes. Return the operand
referred to by the attribute, or DEFAULT_VALUE if the insn doesn't
have the associated attribute. */
static rtx
mips_get_sync_operand (rtx *operands, int index, rtx default_value)
{
if (index > 0)
default_value = operands[index - 1];
return default_value;
}
/* INSN is a sync loop with operands OPERANDS. Build up a multi-insn
sequence for it. */
static void
mips_process_sync_loop (rtx_insn *insn, rtx *operands)
{
rtx at, mem, oldval, newval, inclusive_mask, exclusive_mask;
rtx required_oldval, insn1_op2, tmp1, tmp2, tmp3, cmp;
unsigned int tmp3_insn;
enum attr_sync_insn1 insn1;
enum attr_sync_insn2 insn2;
bool is_64bit_p;
int memmodel_attr;
enum memmodel model;
/* Read an operand from the sync_WHAT attribute and store it in
variable WHAT. DEFAULT is the default value if no attribute
is specified. */
#define READ_OPERAND(WHAT, DEFAULT) \
WHAT = mips_get_sync_operand (operands, (int) get_attr_sync_##WHAT (insn), \
DEFAULT)
/* Read the memory. */
READ_OPERAND (mem, 0);
gcc_assert (mem);
is_64bit_p = (GET_MODE_BITSIZE (GET_MODE (mem)) == 64);
/* Read the other attributes. */
at = gen_rtx_REG (GET_MODE (mem), AT_REGNUM);
READ_OPERAND (oldval, at);
READ_OPERAND (cmp, 0);
READ_OPERAND (newval, at);
READ_OPERAND (inclusive_mask, 0);
READ_OPERAND (exclusive_mask, 0);
READ_OPERAND (required_oldval, 0);
READ_OPERAND (insn1_op2, 0);
insn1 = get_attr_sync_insn1 (insn);
insn2 = get_attr_sync_insn2 (insn);
/* Don't bother setting CMP result that is never used. */
if (cmp && find_reg_note (insn, REG_UNUSED, cmp))
cmp = 0;
memmodel_attr = get_attr_sync_memmodel (insn);
switch (memmodel_attr)
{
case 10:
model = MEMMODEL_ACQ_REL;
break;
case 11:
model = MEMMODEL_ACQUIRE;
break;
default:
model = memmodel_from_int (INTVAL (operands[memmodel_attr]));
}
mips_multi_start ();
/* Output the release side of the memory barrier. */
if (need_atomic_barrier_p (model, true))
{
if (required_oldval == 0 && TARGET_OCTEON)
{
/* Octeon doesn't reorder reads, so a full barrier can be
created by using SYNCW to order writes combined with the
write from the following SC. When the SC successfully
completes, we know that all preceding writes are also
committed to the coherent memory system. It is possible
for a single SYNCW to fail, but a pair of them will never
fail, so we use two. */
mips_multi_add_insn ("syncw", NULL);
mips_multi_add_insn ("syncw", NULL);
}
else
mips_multi_add_insn ("sync", NULL);
}
/* Output the branch-back label. */
mips_multi_add_label ("1:");
/* OLDVAL = *MEM. */
mips_multi_add_insn (is_64bit_p ? "lld\t%0,%1" : "ll\t%0,%1",
oldval, mem, NULL);
/* if ((OLDVAL & INCLUSIVE_MASK) != REQUIRED_OLDVAL) goto 2. */
if (required_oldval)
{
if (inclusive_mask == 0)
tmp1 = oldval;
else
{
gcc_assert (oldval != at);
mips_multi_add_insn ("and\t%0,%1,%2",
at, oldval, inclusive_mask, NULL);
tmp1 = at;
}
if (TARGET_CB_NEVER)
mips_multi_add_insn ("bne\t%0,%z1,2f", tmp1, required_oldval, NULL);
/* CMP = 0 [delay slot]. */
if (cmp)
mips_multi_add_insn ("li\t%0,0", cmp, NULL);
if (TARGET_CB_MAYBE && required_oldval == const0_rtx)
mips_multi_add_insn ("bnezc\t%0,2f", tmp1, NULL);
else if (TARGET_CB_MAYBE)
mips_multi_add_insn ("bnec\t%0,%1,2f", tmp1, required_oldval, NULL);
}
/* $TMP1 = OLDVAL & EXCLUSIVE_MASK. */
if (exclusive_mask == 0)
tmp1 = const0_rtx;
else
{
gcc_assert (oldval != at);
mips_multi_add_insn ("and\t%0,%1,%z2",
at, oldval, exclusive_mask, NULL);
tmp1 = at;
}
/* $TMP2 = INSN1 (OLDVAL, INSN1_OP2).
We can ignore moves if $TMP4 != INSN1_OP2, since we'll still emit
at least one instruction in that case. */
if (insn1 == SYNC_INSN1_MOVE
&& (tmp1 != const0_rtx || insn2 != SYNC_INSN2_NOP))
tmp2 = insn1_op2;
else
{
mips_multi_add_insn (mips_sync_insn1_template (insn1, is_64bit_p),
newval, oldval, insn1_op2, NULL);
tmp2 = newval;
}
/* $TMP3 = INSN2 ($TMP2, INCLUSIVE_MASK). */
if (insn2 == SYNC_INSN2_NOP)
tmp3 = tmp2;
else
{
mips_multi_add_insn (mips_sync_insn2_template (insn2),
newval, tmp2, inclusive_mask, NULL);
tmp3 = newval;
}
tmp3_insn = mips_multi_last_index ();
/* $AT = $TMP1 | $TMP3. */
if (tmp1 == const0_rtx || tmp3 == const0_rtx)
{
mips_multi_set_operand (tmp3_insn, 0, at);
tmp3 = at;
}
else
{
gcc_assert (tmp1 != tmp3);
mips_multi_add_insn ("or\t%0,%1,%2", at, tmp1, tmp3, NULL);
}
/* if (!commit (*MEM = $AT)) goto 1.
This will sometimes be a delayed branch; see the write code below
for details. */
mips_multi_add_insn (is_64bit_p ? "scd\t%0,%1" : "sc\t%0,%1", at, mem, NULL);
/* When using branch likely (-mfix-r10000), the delay slot instruction
will be annulled on false. The normal delay slot instructions
calculate the overall result of the atomic operation and must not
be annulled. To ensure this behavior unconditionally use a NOP
in the delay slot for the branch likely case. */
if (TARGET_CB_MAYBE)
mips_multi_add_insn ("beqzc\t%0,1b", at, NULL);
else
mips_multi_add_insn ("beq%?\t%0,%.,1b%~", at, NULL);
/* if (INSN1 != MOVE && INSN1 != LI) NEWVAL = $TMP3 [delay slot]. */
if (insn1 != SYNC_INSN1_MOVE && insn1 != SYNC_INSN1_LI && tmp3 != newval)
{
mips_multi_copy_insn (tmp3_insn);
mips_multi_set_operand (mips_multi_last_index (), 0, newval);
}
else if (!(required_oldval && cmp) && !mips_branch_likely)
mips_multi_add_insn ("nop", NULL);
/* CMP = 1 -- either standalone or in a delay slot. */
if (required_oldval && cmp)
mips_multi_add_insn ("li\t%0,1", cmp, NULL);
/* Output the acquire side of the memory barrier. */
if (TARGET_SYNC_AFTER_SC && need_atomic_barrier_p (model, false))
mips_multi_add_insn ("sync", NULL);
/* Output the exit label, if needed. */
if (required_oldval)
mips_multi_add_label ("2:");
#undef READ_OPERAND
}
/* Output and/or return the asm template for sync loop INSN, which has
the operands given by OPERANDS. */
const char *
mips_output_sync_loop (rtx_insn *insn, rtx *operands)
{
/* Use branch-likely instructions to work around the LL/SC R10000
errata. */
mips_branch_likely = TARGET_FIX_R10000;
mips_process_sync_loop (insn, operands);
mips_push_asm_switch (&mips_noreorder);
mips_push_asm_switch (&mips_nomacro);
mips_push_asm_switch (&mips_noat);
mips_start_ll_sc_sync_block ();
mips_multi_write ();
mips_end_ll_sc_sync_block ();
mips_pop_asm_switch (&mips_noat);
mips_pop_asm_switch (&mips_nomacro);
mips_pop_asm_switch (&mips_noreorder);
return "";
}
/* Return the number of individual instructions in sync loop INSN,
which has the operands given by OPERANDS. */
unsigned int
mips_sync_loop_insns (rtx_insn *insn, rtx *operands)
{
/* Use branch-likely instructions to work around the LL/SC R10000
errata. */
mips_branch_likely = TARGET_FIX_R10000;
mips_process_sync_loop (insn, operands);
return mips_multi_num_insns;
}
/* Return the assembly code for DIV or DDIV instruction DIVISION, which has
the operands given by OPERANDS. Add in a divide-by-zero check if needed.
When working around R4000 and R4400 errata, we need to make sure that
the division is not immediately followed by a shift[1][2]. We also
need to stop the division from being put into a branch delay slot[3].
The easiest way to avoid both problems is to add a nop after the
division. When a divide-by-zero check is needed, this nop can be
used to fill the branch delay slot.
[1] If a double-word or a variable shift executes immediately
after starting an integer division, the shift may give an
incorrect result. See quotations of errata #16 and #28 from
"MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0"
in mips.md for details.
[2] A similar bug to [1] exists for all revisions of the
R4000 and the R4400 when run in an MC configuration.
From "MIPS R4000MC Errata, Processor Revision 2.2 and 3.0":
"19. In this following sequence:
ddiv (or ddivu or div or divu)
dsll32 (or dsrl32, dsra32)
if an MPT stall occurs, while the divide is slipping the cpu
pipeline, then the following double shift would end up with an
incorrect result.
Workaround: The compiler needs to avoid generating any
sequence with divide followed by extended double shift."
This erratum is also present in "MIPS R4400MC Errata, Processor
Revision 1.0" and "MIPS R4400MC Errata, Processor Revision 2.0
& 3.0" as errata #10 and #4, respectively.
[3] From "MIPS R4000PC/SC Errata, Processor Revision 2.2 and 3.0"
(also valid for MIPS R4000MC processors):
"52. R4000SC: This bug does not apply for the R4000PC.
There are two flavors of this bug:
1) If the instruction just after divide takes an RF exception
(tlb-refill, tlb-invalid) and gets an instruction cache
miss (both primary and secondary) and the line which is
currently in secondary cache at this index had the first
data word, where the bits 5..2 are set, then R4000 would
get a wrong result for the div.
##1
nop
div r8, r9
------------------- # end-of page. -tlb-refill
nop
##2
nop
div r8, r9
------------------- # end-of page. -tlb-invalid
nop
2) If the divide is in the taken branch delay slot, where the
target takes RF exception and gets an I-cache miss for the
exception vector or where I-cache miss occurs for the
target address, under the above mentioned scenarios, the
div would get wrong results.
##1
j r2 # to next page mapped or unmapped
div r8,r9 # this bug would be there as long
# as there is an ICache miss and
nop # the "data pattern" is present
##2
beq r0, r0, NextPage # to Next page
div r8,r9
nop
This bug is present for div, divu, ddiv, and ddivu
instructions.
Workaround: For item 1), OS could make sure that the next page
after the divide instruction is also mapped. For item 2), the
compiler could make sure that the divide instruction is not in
the branch delay slot."
These processors have PRId values of 0x00004220 and 0x00004300 for
the R4000 and 0x00004400, 0x00004500 and 0x00004600 for the R4400. */
const char *
mips_output_division (const char *division, rtx *operands)
{
const char *s;
s = division;
if (TARGET_FIX_R4000 || TARGET_FIX_R4400)
{
output_asm_insn (s, operands);
s = "nop";
}
if (TARGET_CHECK_ZERO_DIV)
{
if (TARGET_MIPS16)
{
output_asm_insn (s, operands);
s = "bnez\t%2,1f\n\tbreak\t7\n1:";
}
else if (GENERATE_DIVIDE_TRAPS)
{
/* Avoid long replay penalty on load miss by putting the trap before
the divide. */
if (TUNE_74K)
output_asm_insn ("teq\t%2,%.,7", operands);
else
{
output_asm_insn (s, operands);
s = "teq\t%2,%.,7";
}
}
else
{
if (flag_delayed_branch)
{
output_asm_insn ("%(bne\t%2,%.,1f", operands);
output_asm_insn (s, operands);
s = "break\t7%)\n1:";
}
else
{
output_asm_insn (s, operands);
s = "bne\t%2,%.,1f\n\tnop\n\tbreak\t7\n1:";
}
}
}
return s;
}
/* Return the assembly code for MSA DIV_{S,U}.DF or MOD_{S,U}.DF instructions,
which has the operands given by OPERANDS. Add in a divide-by-zero check
if needed. */
const char *
mips_msa_output_division (const char *division, rtx *operands)
{
const char *s;
s = division;
if (TARGET_CHECK_ZERO_DIV)
{
output_asm_insn ("%(bnz.%v0\t%w2,1f", operands);
output_asm_insn (s, operands);
s = "break\t7%)\n1:";
}
return s;
}
/* Return the assembly code for MSA immediate shift instructions,
which has the operands given by OPERANDS. Truncate the shift amount
to make GAS happy. */
const char *
mips_msa_output_shift_immediate (const char *shift, rtx *operands)
{
rtx amount = operands[2];
machine_mode mode = amount->mode;
unsigned val = UINTVAL (CONST_VECTOR_ELT (amount, 0));
val &= GET_MODE_UNIT_BITSIZE (mode) - 1;
if (!val)
return "";
rtx c = gen_int_mode (val, GET_MODE_INNER (mode));
operands[2] = gen_const_vec_duplicate (mode, c);
return shift;
}
/* Return true if destination of IN_INSN is used as add source in
OUT_INSN. Both IN_INSN and OUT_INSN are of type fmadd. Example:
madd.s dst, x, y, z
madd.s a, dst, b, c */
bool
mips_fmadd_bypass (rtx_insn *out_insn, rtx_insn *in_insn)
{
int dst_reg, src_reg;
gcc_assert (get_attr_type (in_insn) == TYPE_FMADD);
gcc_assert (get_attr_type (out_insn) == TYPE_FMADD);
extract_insn (in_insn);
dst_reg = REG_P (recog_data.operand[0]);
extract_insn (out_insn);
src_reg = REG_P (recog_data.operand[1]);
if (dst_reg == src_reg)
return true;
return false;
}
/* Return true if IN_INSN is a multiply-add or multiply-subtract
instruction and if OUT_INSN assigns to the accumulator operand. */
bool
mips_linked_madd_p (rtx_insn *out_insn, rtx_insn *in_insn)
{
enum attr_accum_in accum_in;
int accum_in_opnum;
rtx accum_in_op;
if (recog_memoized (in_insn) < 0)
return false;
accum_in = get_attr_accum_in (in_insn);
if (accum_in == ACCUM_IN_NONE)
return false;
accum_in_opnum = accum_in - ACCUM_IN_0;
extract_insn (in_insn);
gcc_assert (accum_in_opnum < recog_data.n_operands);
accum_in_op = recog_data.operand[accum_in_opnum];
return reg_set_p (accum_in_op, out_insn);
}
/* True if the dependency between OUT_INSN and IN_INSN is on the store
data rather than the address. We need this because the cprestore
pattern is type "store", but is defined using an UNSPEC_VOLATILE,
which causes the default routine to abort. We just return false
for that case. */
bool
mips_store_data_bypass_p (rtx_insn *out_insn, rtx_insn *in_insn)
{
if (GET_CODE (PATTERN (in_insn)) == UNSPEC_VOLATILE)
return false;
return store_data_bypass_p (out_insn, in_insn);
}
/* Variables and flags used in scheduler hooks when tuning for
Loongson 2E/2F. */
static struct
{
/* Variables to support Loongson 2E/2F round-robin [F]ALU1/2 dispatch
strategy. */
/* If true, then next ALU1/2 instruction will go to ALU1. */
bool alu1_turn_p;
/* If true, then next FALU1/2 unstruction will go to FALU1. */
bool falu1_turn_p;
/* Codes to query if [f]alu{1,2}_core units are subscribed or not. */
int alu1_core_unit_code;
int alu2_core_unit_code;
int falu1_core_unit_code;
int falu2_core_unit_code;
/* True if current cycle has a multi instruction.
This flag is used in mips_ls2_dfa_post_advance_cycle. */
bool cycle_has_multi_p;
/* Instructions to subscribe ls2_[f]alu{1,2}_turn_enabled units.
These are used in mips_ls2_dfa_post_advance_cycle to initialize
DFA state.
E.g., when alu1_turn_enabled_insn is issued it makes next ALU1/2
instruction to go ALU1. */
rtx_insn *alu1_turn_enabled_insn;
rtx_insn *alu2_turn_enabled_insn;
rtx_insn *falu1_turn_enabled_insn;
rtx_insn *falu2_turn_enabled_insn;
} mips_ls2;
/* Implement TARGET_SCHED_ADJUST_COST. We assume that anti and output
dependencies have no cost, except on the 20Kc where output-dependence
is treated like input-dependence. */
static int
mips_adjust_cost (rtx_insn *, int dep_type, rtx_insn *, int cost, unsigned int)
{
if (dep_type != 0 && (dep_type != REG_DEP_OUTPUT || !TUNE_20KC))
return 0;
return cost;
}
/* Return the number of instructions that can be issued per cycle. */
static int
mips_issue_rate (void)
{
switch (mips_tune)
{
case PROCESSOR_74KC:
case PROCESSOR_74KF2_1:
case PROCESSOR_74KF1_1:
case PROCESSOR_74KF3_2:
/* The 74k is not strictly quad-issue cpu, but can be seen as one
by the scheduler. It can issue 1 ALU, 1 AGEN and 2 FPU insns,
but in reality only a maximum of 3 insns can be issued as
floating-point loads and stores also require a slot in the
AGEN pipe. */
case PROCESSOR_R10000:
/* All R10K Processors are quad-issue (being the first MIPS
processors to support this feature). */
return 4;
case PROCESSOR_20KC:
case PROCESSOR_R4130:
case PROCESSOR_R5400:
case PROCESSOR_R5500:
case PROCESSOR_R5900:
case PROCESSOR_R7000:
case PROCESSOR_R9000:
case PROCESSOR_OCTEON:
case PROCESSOR_OCTEON2:
case PROCESSOR_OCTEON3:
case PROCESSOR_I6400:
case PROCESSOR_GS264E:
return 2;
case PROCESSOR_SB1:
case PROCESSOR_SB1A:
/* This is actually 4, but we get better performance if we claim 3.
This is partly because of unwanted speculative code motion with the
larger number, and partly because in most common cases we can't
reach the theoretical max of 4. */
return 3;
case PROCESSOR_LOONGSON_2E:
case PROCESSOR_LOONGSON_2F:
case PROCESSOR_GS464:
case PROCESSOR_GS464E:
case PROCESSOR_P5600:
case PROCESSOR_P6600:
return 4;
case PROCESSOR_XLP:
return (reload_completed ? 4 : 3);
default:
return 1;
}
}
/* Implement TARGET_SCHED_INIT_DFA_POST_CYCLE_INSN hook for Loongson2. */
static void
mips_ls2_init_dfa_post_cycle_insn (void)
{
start_sequence ();
emit_insn (gen_ls2_alu1_turn_enabled_insn ());
mips_ls2.alu1_turn_enabled_insn = get_insns ();
end_sequence ();
start_sequence ();
emit_insn (gen_ls2_alu2_turn_enabled_insn ());
mips_ls2.alu2_turn_enabled_insn = get_insns ();
end_sequence ();
start_sequence ();
emit_insn (gen_ls2_falu1_turn_enabled_insn ());
mips_ls2.falu1_turn_enabled_insn = get_insns ();
end_sequence ();
start_sequence ();
emit_insn (gen_ls2_falu2_turn_enabled_insn ());
mips_ls2.falu2_turn_enabled_insn = get_insns ();
end_sequence ();
mips_ls2.alu1_core_unit_code = get_cpu_unit_code ("ls2_alu1_core");
mips_ls2.alu2_core_unit_code = get_cpu_unit_code ("ls2_alu2_core");
mips_ls2.falu1_core_unit_code = get_cpu_unit_code ("ls2_falu1_core");
mips_ls2.falu2_core_unit_code = get_cpu_unit_code ("ls2_falu2_core");
}
/* Implement TARGET_SCHED_INIT_DFA_POST_CYCLE_INSN hook.
Init data used in mips_dfa_post_advance_cycle. */
static void
mips_init_dfa_post_cycle_insn (void)
{
if (TUNE_LOONGSON_2EF)
mips_ls2_init_dfa_post_cycle_insn ();
}
/* Initialize STATE when scheduling for Loongson 2E/2F.
Support round-robin dispatch scheme by enabling only one of
ALU1/ALU2 and one of FALU1/FALU2 units for ALU1/2 and FALU1/2 instructions
respectively. */
static void
mips_ls2_dfa_post_advance_cycle (state_t state)
{
if (cpu_unit_reservation_p (state, mips_ls2.alu1_core_unit_code))
{
/* Though there are no non-pipelined ALU1 insns,
we can get an instruction of type 'multi' before reload. */
gcc_assert (mips_ls2.cycle_has_multi_p);
mips_ls2.alu1_turn_p = false;
}
mips_ls2.cycle_has_multi_p = false;
if (cpu_unit_reservation_p (state, mips_ls2.alu2_core_unit_code))
/* We have a non-pipelined alu instruction in the core,
adjust round-robin counter. */
mips_ls2.alu1_turn_p = true;
if (mips_ls2.alu1_turn_p)
{
if (state_transition (state, mips_ls2.alu1_turn_enabled_insn) >= 0)
gcc_unreachable ();
}
else
{
if (state_transition (state, mips_ls2.alu2_turn_enabled_insn) >= 0)
gcc_unreachable ();
}
if (cpu_unit_reservation_p (state, mips_ls2.falu1_core_unit_code))
{
/* There are no non-pipelined FALU1 insns. */
gcc_unreachable ();
mips_ls2.falu1_turn_p = false;
}
if (cpu_unit_reservation_p (state, mips_ls2.falu2_core_unit_code))
/* We have a non-pipelined falu instruction in the core,
adjust round-robin counter. */
mips_ls2.falu1_turn_p = true;
if (mips_ls2.falu1_turn_p)
{
if (state_transition (state, mips_ls2.falu1_turn_enabled_insn) >= 0)
gcc_unreachable ();
}
else
{
if (state_transition (state, mips_ls2.falu2_turn_enabled_insn) >= 0)
gcc_unreachable ();
}
}
/* Implement TARGET_SCHED_DFA_POST_ADVANCE_CYCLE.
This hook is being called at the start of each cycle. */
static void
mips_dfa_post_advance_cycle (void)
{
if (TUNE_LOONGSON_2EF)
mips_ls2_dfa_post_advance_cycle (curr_state);
}
/* Implement TARGET_SCHED_FIRST_CYCLE_MULTIPASS_DFA_LOOKAHEAD. This should
be as wide as the scheduling freedom in the DFA. */
static int
mips_multipass_dfa_lookahead (void)
{
/* Can schedule up to 4 of the 6 function units in any one cycle. */
if (TUNE_SB1)
return 4;
if (TUNE_LOONGSON_2EF || TUNE_GS464 || TUNE_GS464E)
return 4;
if (TUNE_OCTEON || TUNE_GS264E)
return 2;
if (TUNE_P5600 || TUNE_P6600 || TUNE_I6400)
return 4;
return 0;
}
/* Remove the instruction at index LOWER from ready queue READY and
reinsert it in front of the instruction at index HIGHER. LOWER must
be <= HIGHER. */
static void
mips_promote_ready (rtx_insn **ready, int lower, int higher)
{
rtx_insn *new_head;
int i;
new_head = ready[lower];
for (i = lower; i < higher; i++)
ready[i] = ready[i + 1];
ready[i] = new_head;
}
/* If the priority of the instruction at POS2 in the ready queue READY
is within LIMIT units of that of the instruction at POS1, swap the
instructions if POS2 is not already less than POS1. */
static void
mips_maybe_swap_ready (rtx_insn **ready, int pos1, int pos2, int limit)
{
if (pos1 < pos2
&& INSN_PRIORITY (ready[pos1]) + limit >= INSN_PRIORITY (ready[pos2]))
{
rtx_insn *temp;
temp = ready[pos1];
ready[pos1] = ready[pos2];
ready[pos2] = temp;
}
}
/* Used by TUNE_MACC_CHAINS to record the last scheduled instruction
that may clobber hi or lo. */
static rtx_insn *mips_macc_chains_last_hilo;
/* A TUNE_MACC_CHAINS helper function. Record that instruction INSN has
been scheduled, updating mips_macc_chains_last_hilo appropriately. */
static void
mips_macc_chains_record (rtx_insn *insn)
{
if (get_attr_may_clobber_hilo (insn))
mips_macc_chains_last_hilo = insn;
}
/* A TUNE_MACC_CHAINS helper function. Search ready queue READY, which
has NREADY elements, looking for a multiply-add or multiply-subtract
instruction that is cumulative with mips_macc_chains_last_hilo.
If there is one, promote it ahead of anything else that might
clobber hi or lo. */
static void
mips_macc_chains_reorder (rtx_insn **ready, int nready)
{
int i, j;
if (mips_macc_chains_last_hilo != 0)
for (i = nready - 1; i >= 0; i--)
if (mips_linked_madd_p (mips_macc_chains_last_hilo, ready[i]))
{
for (j = nready - 1; j > i; j--)
if (recog_memoized (ready[j]) >= 0
&& get_attr_may_clobber_hilo (ready[j]))
{
mips_promote_ready (ready, i, j);
break;
}
break;
}
}
/* The last instruction to be scheduled. */
static rtx_insn *vr4130_last_insn;
/* A note_stores callback used by vr4130_true_reg_dependence_p. DATA
points to an rtx that is initially an instruction. Nullify the rtx
if the instruction uses the value of register X. */
static void
vr4130_true_reg_dependence_p_1 (rtx x, const_rtx pat ATTRIBUTE_UNUSED,
void *data)
{
rtx *insn_ptr;
insn_ptr = (rtx *) data;
if (REG_P (x)
&& *insn_ptr != 0
&& reg_referenced_p (x, PATTERN (*insn_ptr)))
*insn_ptr = 0;
}
/* Return true if there is true register dependence between vr4130_last_insn
and INSN. */
static bool
vr4130_true_reg_dependence_p (rtx insn)
{
note_stores (vr4130_last_insn, vr4130_true_reg_dependence_p_1, &insn);
return insn == 0;
}
/* A TUNE_MIPS4130 helper function. Given that INSN1 is at the head of
the ready queue and that INSN2 is the instruction after it, return
true if it is worth promoting INSN2 ahead of INSN1. Look for cases
in which INSN1 and INSN2 can probably issue in parallel, but for
which (INSN2, INSN1) should be less sensitive to instruction
alignment than (INSN1, INSN2). See 4130.md for more details. */
static bool
vr4130_swap_insns_p (rtx_insn *insn1, rtx_insn *insn2)
{
sd_iterator_def sd_it;
dep_t dep;
/* Check for the following case:
1) there is some other instruction X with an anti dependence on INSN1;
2) X has a higher priority than INSN2; and
3) X is an arithmetic instruction (and thus has no unit restrictions).
If INSN1 is the last instruction blocking X, it would better to
choose (INSN1, X) over (INSN2, INSN1). */
FOR_EACH_DEP (insn1, SD_LIST_FORW, sd_it, dep)
if (DEP_TYPE (dep) == REG_DEP_ANTI
&& INSN_PRIORITY (DEP_CON (dep)) > INSN_PRIORITY (insn2)
&& recog_memoized (DEP_CON (dep)) >= 0
&& get_attr_vr4130_class (DEP_CON (dep)) == VR4130_CLASS_ALU)
return false;
if (vr4130_last_insn != 0
&& recog_memoized (insn1) >= 0
&& recog_memoized (insn2) >= 0)
{
/* See whether INSN1 and INSN2 use different execution units,
or if they are both ALU-type instructions. If so, they can
probably execute in parallel. */
enum attr_vr4130_class class1 = get_attr_vr4130_class (insn1);
enum attr_vr4130_class class2 = get_attr_vr4130_class (insn2);
if (class1 != class2 || class1 == VR4130_CLASS_ALU)
{
/* If only one of the instructions has a dependence on
vr4130_last_insn, prefer to schedule the other one first. */
bool dep1_p = vr4130_true_reg_dependence_p (insn1);
bool dep2_p = vr4130_true_reg_dependence_p (insn2);
if (dep1_p != dep2_p)
return dep1_p;
/* Prefer to schedule INSN2 ahead of INSN1 if vr4130_last_insn
is not an ALU-type instruction and if INSN1 uses the same
execution unit. (Note that if this condition holds, we already
know that INSN2 uses a different execution unit.) */
if (class1 != VR4130_CLASS_ALU
&& recog_memoized (vr4130_last_insn) >= 0
&& class1 == get_attr_vr4130_class (vr4130_last_insn))
return true;
}
}
return false;
}
/* A TUNE_MIPS4130 helper function. (READY, NREADY) describes a ready
queue with at least two instructions. Swap the first two if
vr4130_swap_insns_p says that it could be worthwhile. */
static void
vr4130_reorder (rtx_insn **ready, int nready)
{
if (vr4130_swap_insns_p (ready[nready - 1], ready[nready - 2]))
mips_promote_ready (ready, nready - 2, nready - 1);
}
/* Record whether last 74k AGEN instruction was a load or store. */
static enum attr_type mips_last_74k_agen_insn = TYPE_UNKNOWN;
/* Initialize mips_last_74k_agen_insn from INSN. A null argument
resets to TYPE_UNKNOWN state. */
static void
mips_74k_agen_init (rtx_insn *insn)
{
if (!insn || CALL_P (insn) || JUMP_P (insn))
mips_last_74k_agen_insn = TYPE_UNKNOWN;
else
{
enum attr_type type = get_attr_type (insn);
if (type == TYPE_LOAD || type == TYPE_STORE)
mips_last_74k_agen_insn = type;
}
}
/* A TUNE_74K helper function. The 74K AGEN pipeline likes multiple
loads to be grouped together, and multiple stores to be grouped
together. Swap things around in the ready queue to make this happen. */
static void
mips_74k_agen_reorder (rtx_insn **ready, int nready)
{
int i;
int store_pos, load_pos;
store_pos = -1;
load_pos = -1;
for (i = nready - 1; i >= 0; i--)
{
rtx_insn *insn = ready[i];
if (USEFUL_INSN_P (insn))
switch (get_attr_type (insn))
{
case TYPE_STORE:
if (store_pos == -1)
store_pos = i;
break;
case TYPE_LOAD:
if (load_pos == -1)
load_pos = i;
break;
default:
break;
}
}
if (load_pos == -1 || store_pos == -1)
return;
switch (mips_last_74k_agen_insn)
{
case TYPE_UNKNOWN:
/* Prefer to schedule loads since they have a higher latency. */
case TYPE_LOAD:
/* Swap loads to the front of the queue. */
mips_maybe_swap_ready (ready, load_pos, store_pos, 4);
break;
case TYPE_STORE:
/* Swap stores to the front of the queue. */
mips_maybe_swap_ready (ready, store_pos, load_pos, 4);
break;
default:
break;
}
}
/* Implement TARGET_SCHED_INIT. */
static void
mips_sched_init (FILE *file ATTRIBUTE_UNUSED, int verbose ATTRIBUTE_UNUSED,
int max_ready ATTRIBUTE_UNUSED)
{
mips_macc_chains_last_hilo = 0;
vr4130_last_insn = 0;
mips_74k_agen_init (NULL);
/* When scheduling for Loongson2, branch instructions go to ALU1,
therefore basic block is most likely to start with round-robin counter
pointed to ALU2. */
mips_ls2.alu1_turn_p = false;
mips_ls2.falu1_turn_p = true;
}
/* Subroutine used by TARGET_SCHED_REORDER and TARGET_SCHED_REORDER2. */
static void
mips_sched_reorder_1 (FILE *file ATTRIBUTE_UNUSED, int verbose ATTRIBUTE_UNUSED,
rtx_insn **ready, int *nreadyp, int cycle ATTRIBUTE_UNUSED)
{
if (!reload_completed
&& TUNE_MACC_CHAINS
&& *nreadyp > 0)
mips_macc_chains_reorder (ready, *nreadyp);
if (reload_completed
&& TUNE_MIPS4130
&& !TARGET_VR4130_ALIGN
&& *nreadyp > 1)
vr4130_reorder (ready, *nreadyp);
if (TUNE_74K)
mips_74k_agen_reorder (ready, *nreadyp);
}
/* Implement TARGET_SCHED_REORDER. */
static int
mips_sched_reorder (FILE *file ATTRIBUTE_UNUSED, int verbose ATTRIBUTE_UNUSED,
rtx_insn **ready, int *nreadyp, int cycle ATTRIBUTE_UNUSED)
{
mips_sched_reorder_1 (file, verbose, ready, nreadyp, cycle);
return mips_issue_rate ();
}
/* Implement TARGET_SCHED_REORDER2. */
static int
mips_sched_reorder2 (FILE *file ATTRIBUTE_UNUSED, int verbose ATTRIBUTE_UNUSED,
rtx_insn **ready, int *nreadyp, int cycle ATTRIBUTE_UNUSED)
{
mips_sched_reorder_1 (file, verbose, ready, nreadyp, cycle);
return cached_can_issue_more;
}
/* Update round-robin counters for ALU1/2 and FALU1/2. */
static void
mips_ls2_variable_issue (rtx_insn *insn)
{
if (mips_ls2.alu1_turn_p)
{
if (cpu_unit_reservation_p (curr_state, mips_ls2.alu1_core_unit_code))
mips_ls2.alu1_turn_p = false;
}
else
{
if (cpu_unit_reservation_p (curr_state, mips_ls2.alu2_core_unit_code))
mips_ls2.alu1_turn_p = true;
}
if (mips_ls2.falu1_turn_p)
{
if (cpu_unit_reservation_p (curr_state, mips_ls2.falu1_core_unit_code))
mips_ls2.falu1_turn_p = false;
}
else
{
if (cpu_unit_reservation_p (curr_state, mips_ls2.falu2_core_unit_code))
mips_ls2.falu1_turn_p = true;
}
if (recog_memoized (insn) >= 0)
mips_ls2.cycle_has_multi_p |= (get_attr_type (insn) == TYPE_MULTI);
}
/* Implement TARGET_SCHED_VARIABLE_ISSUE. */
static int
mips_variable_issue (FILE *file ATTRIBUTE_UNUSED, int verbose ATTRIBUTE_UNUSED,
rtx_insn *insn, int more)
{
/* Ignore USEs and CLOBBERs; don't count them against the issue rate. */
if (USEFUL_INSN_P (insn))
{
if (get_attr_type (insn) != TYPE_GHOST)
more--;
if (!reload_completed && TUNE_MACC_CHAINS)
mips_macc_chains_record (insn);
vr4130_last_insn = insn;
if (TUNE_74K)
mips_74k_agen_init (insn);
else if (TUNE_LOONGSON_2EF)
mips_ls2_variable_issue (insn);
}
/* Instructions of type 'multi' should all be split before
the second scheduling pass. */
gcc_assert (!reload_completed
|| recog_memoized (insn) < 0
|| get_attr_type (insn) != TYPE_MULTI);
cached_can_issue_more = more;
return more;
}
/* Given that we have an rtx of the form (prefetch ... WRITE LOCALITY),
return the first operand of the associated PREF or PREFX insn. */
rtx
mips_prefetch_cookie (rtx write, rtx locality)
{
/* store_streamed / load_streamed. */
if (INTVAL (locality) <= 0)
return GEN_INT (INTVAL (write) + 4);
/* store / load. */
if (INTVAL (locality) <= 2)
return write;
/* store_retained / load_retained. */
return GEN_INT (INTVAL (write) + 6);
}
/* Loongson EXT2 only implements pref hint=0 (prefetch for load) and hint=1
(prefetch for store), other hint just scale to hint = 0 and hint = 1. */
rtx
mips_loongson_ext2_prefetch_cookie (rtx write, rtx)
{
/* store. */
if (INTVAL (write) == 1)
return GEN_INT (INTVAL (write));
/* load. */
if (INTVAL (write) == 0)
return GEN_INT (INTVAL (write));
gcc_unreachable ();
}
/* Flags that indicate when a built-in function is available.
BUILTIN_AVAIL_NON_MIPS16
The function is available on the current target if !TARGET_MIPS16.
BUILTIN_AVAIL_MIPS16
The function is available on the current target if TARGET_MIPS16. */
#define BUILTIN_AVAIL_NON_MIPS16 1
#define BUILTIN_AVAIL_MIPS16 2
/* Declare an availability predicate for built-in functions that
require non-MIPS16 mode and also require COND to be true.
NAME is the main part of the predicate's name. */
#define AVAIL_NON_MIPS16(NAME, COND) \
static unsigned int \
mips_builtin_avail_##NAME (void) \
{ \
return (COND) ? BUILTIN_AVAIL_NON_MIPS16 : 0; \
}
/* Declare an availability predicate for built-in functions that
support both MIPS16 and non-MIPS16 code and also require COND
to be true. NAME is the main part of the predicate's name. */
#define AVAIL_ALL(NAME, COND) \
static unsigned int \
mips_builtin_avail_##NAME (void) \
{ \
return (COND) ? BUILTIN_AVAIL_NON_MIPS16 | BUILTIN_AVAIL_MIPS16 : 0; \
}
/* This structure describes a single built-in function. */
struct mips_builtin_description {
/* The code of the main .md file instruction. See mips_builtin_type
for more information. */
enum insn_code icode;
/* The floating-point comparison code to use with ICODE, if any. */
enum mips_fp_condition cond;
/* The name of the built-in function. */
const char *name;
/* Specifies how the function should be expanded. */
enum mips_builtin_type builtin_type;
/* The function's prototype. */
enum mips_function_type function_type;
/* Whether the function is available. */
unsigned int (*avail) (void);
/* Whether the function is pure. */
bool is_pure;
};
AVAIL_ALL (hard_float, TARGET_HARD_FLOAT_ABI)
AVAIL_NON_MIPS16 (paired_single, TARGET_PAIRED_SINGLE_FLOAT)
AVAIL_NON_MIPS16 (sb1_paired_single, TARGET_SB1 && TARGET_PAIRED_SINGLE_FLOAT)
AVAIL_NON_MIPS16 (mips3d, TARGET_MIPS3D)
AVAIL_NON_MIPS16 (dsp, TARGET_DSP)
AVAIL_NON_MIPS16 (dspr2, TARGET_DSPR2)
AVAIL_NON_MIPS16 (dsp_32, !TARGET_64BIT && TARGET_DSP)
AVAIL_NON_MIPS16 (dsp_64, TARGET_64BIT && TARGET_DSP)
AVAIL_NON_MIPS16 (dspr2_32, !TARGET_64BIT && TARGET_DSPR2)
AVAIL_NON_MIPS16 (loongson, TARGET_LOONGSON_MMI)
AVAIL_NON_MIPS16 (cache, TARGET_CACHE_BUILTIN)
AVAIL_NON_MIPS16 (msa, TARGET_MSA)
/* Construct a mips_builtin_description from the given arguments.
INSN is the name of the associated instruction pattern, without the
leading CODE_FOR_mips_.
CODE is the floating-point condition code associated with the
function. It can be 'f' if the field is not applicable.
NAME is the name of the function itself, without the leading
"__builtin_mips_".
BUILTIN_TYPE and FUNCTION_TYPE are mips_builtin_description fields.
AVAIL is the name of the availability predicate, without the leading
mips_builtin_avail_. */
#define MIPS_BUILTIN(INSN, COND, NAME, BUILTIN_TYPE, \
FUNCTION_TYPE, AVAIL, PURE) \
{ CODE_FOR_mips_ ## INSN, MIPS_FP_COND_ ## COND, \
"__builtin_mips_" NAME, BUILTIN_TYPE, FUNCTION_TYPE, \
mips_builtin_avail_ ## AVAIL, PURE }
/* Define __builtin_mips_<INSN>, which is a MIPS_BUILTIN_DIRECT function
mapped to instruction CODE_FOR_mips_<INSN>, FUNCTION_TYPE and AVAIL
are as for MIPS_BUILTIN. */
#define DIRECT_BUILTIN(INSN, FUNCTION_TYPE, AVAIL) \
MIPS_BUILTIN (INSN, f, #INSN, MIPS_BUILTIN_DIRECT, FUNCTION_TYPE, \
AVAIL, false)
/* Define __builtin_mips_<INSN>, which is a MIPS_BUILTIN_DIRECT pure function
mapped to instruction CODE_FOR_mips_<INSN>, FUNCTION_TYPE and AVAIL
are as for MIPS_BUILTIN. */
#define DIRECT_BUILTIN_PURE(INSN, FUNCTION_TYPE, AVAIL) \
MIPS_BUILTIN (INSN, f, #INSN, MIPS_BUILTIN_DIRECT, FUNCTION_TYPE, \
AVAIL, true)
/* Define __builtin_mips_<INSN>_<COND>_{s,d} functions, both of which
are subject to mips_builtin_avail_<AVAIL>. */
#define CMP_SCALAR_BUILTINS(INSN, COND, AVAIL) \
MIPS_BUILTIN (INSN ## _cond_s, COND, #INSN "_" #COND "_s", \
MIPS_BUILTIN_CMP_SINGLE, MIPS_INT_FTYPE_SF_SF, AVAIL, \
false), \
MIPS_BUILTIN (INSN ## _cond_d, COND, #INSN "_" #COND "_d", \
MIPS_BUILTIN_CMP_SINGLE, MIPS_INT_FTYPE_DF_DF, AVAIL, false)
/* Define __builtin_mips_{any,all,upper,lower}_<INSN>_<COND>_ps.
The lower and upper forms are subject to mips_builtin_avail_<AVAIL>
while the any and all forms are subject to mips_builtin_avail_mips3d. */
#define CMP_PS_BUILTINS(INSN, COND, AVAIL) \
MIPS_BUILTIN (INSN ## _cond_ps, COND, "any_" #INSN "_" #COND "_ps", \
MIPS_BUILTIN_CMP_ANY, MIPS_INT_FTYPE_V2SF_V2SF, \
mips3d, false), \
MIPS_BUILTIN (INSN ## _cond_ps, COND, "all_" #INSN "_" #COND "_ps", \
MIPS_BUILTIN_CMP_ALL, MIPS_INT_FTYPE_V2SF_V2SF, \
mips3d, false), \
MIPS_BUILTIN (INSN ## _cond_ps, COND, "lower_" #INSN "_" #COND "_ps", \
MIPS_BUILTIN_CMP_LOWER, MIPS_INT_FTYPE_V2SF_V2SF, \
AVAIL, false), \
MIPS_BUILTIN (INSN ## _cond_ps, COND, "upper_" #INSN "_" #COND "_ps", \
MIPS_BUILTIN_CMP_UPPER, MIPS_INT_FTYPE_V2SF_V2SF, \
AVAIL, false)
/* Define __builtin_mips_{any,all}_<INSN>_<COND>_4s. The functions
are subject to mips_builtin_avail_mips3d. */
#define CMP_4S_BUILTINS(INSN, COND) \
MIPS_BUILTIN (INSN ## _cond_4s, COND, "any_" #INSN "_" #COND "_4s", \
MIPS_BUILTIN_CMP_ANY, \
MIPS_INT_FTYPE_V2SF_V2SF_V2SF_V2SF, mips3d, false), \
MIPS_BUILTIN (INSN ## _cond_4s, COND, "all_" #INSN "_" #COND "_4s", \
MIPS_BUILTIN_CMP_ALL, \
MIPS_INT_FTYPE_V2SF_V2SF_V2SF_V2SF, mips3d, false)
/* Define __builtin_mips_mov{t,f}_<INSN>_<COND>_ps. The comparison
instruction requires mips_builtin_avail_<AVAIL>. */
#define MOVTF_BUILTINS(INSN, COND, AVAIL) \
MIPS_BUILTIN (INSN ## _cond_ps, COND, "movt_" #INSN "_" #COND "_ps", \
MIPS_BUILTIN_MOVT, MIPS_V2SF_FTYPE_V2SF_V2SF_V2SF_V2SF, \
AVAIL, false), \
MIPS_BUILTIN (INSN ## _cond_ps, COND, "movf_" #INSN "_" #COND "_ps", \
MIPS_BUILTIN_MOVF, MIPS_V2SF_FTYPE_V2SF_V2SF_V2SF_V2SF, \
AVAIL, false)
/* Define all the built-in functions related to C.cond.fmt condition COND. */
#define CMP_BUILTINS(COND) \
MOVTF_BUILTINS (c, COND, paired_single), \
MOVTF_BUILTINS (cabs, COND, mips3d), \
CMP_SCALAR_BUILTINS (cabs, COND, mips3d), \
CMP_PS_BUILTINS (c, COND, paired_single), \
CMP_PS_BUILTINS (cabs, COND, mips3d), \
CMP_4S_BUILTINS (c, COND), \
CMP_4S_BUILTINS (cabs, COND)
/* Define __builtin_mips_<INSN>, which is a MIPS_BUILTIN_DIRECT_NO_TARGET
function mapped to instruction CODE_FOR_mips_<INSN>, FUNCTION_TYPE
and AVAIL are as for MIPS_BUILTIN. */
#define DIRECT_NO_TARGET_BUILTIN(INSN, FUNCTION_TYPE, AVAIL) \
MIPS_BUILTIN (INSN, f, #INSN, MIPS_BUILTIN_DIRECT_NO_TARGET, \
FUNCTION_TYPE, AVAIL, false)
/* Define __builtin_mips_bposge<VALUE>. <VALUE> is 32 for the MIPS32 DSP
branch instruction. AVAIL is as for MIPS_BUILTIN. */
#define BPOSGE_BUILTIN(VALUE, AVAIL) \
MIPS_BUILTIN (bposge, f, "bposge" #VALUE, \
MIPS_BUILTIN_BPOSGE ## VALUE, MIPS_SI_FTYPE_VOID, AVAIL, false)
/* Define a Loongson MIPS_BUILTIN_DIRECT function __builtin_loongson_<FN_NAME>
for instruction CODE_FOR_loongson_<INSN>. FUNCTION_TYPE is a
builtin_description field. */
#define LOONGSON_BUILTIN_ALIAS(INSN, FN_NAME, FUNCTION_TYPE) \
{ CODE_FOR_loongson_ ## INSN, MIPS_FP_COND_f, \
"__builtin_loongson_" #FN_NAME, MIPS_BUILTIN_DIRECT, \
FUNCTION_TYPE, mips_builtin_avail_loongson, false }
/* Define a Loongson MIPS_BUILTIN_DIRECT function __builtin_loongson_<INSN>
for instruction CODE_FOR_loongson_<INSN>. FUNCTION_TYPE is a
builtin_description field. */
#define LOONGSON_BUILTIN(INSN, FUNCTION_TYPE) \
LOONGSON_BUILTIN_ALIAS (INSN, INSN, FUNCTION_TYPE)
/* Like LOONGSON_BUILTIN, but add _<SUFFIX> to the end of the function name.
We use functions of this form when the same insn can be usefully applied
to more than one datatype. */
#define LOONGSON_BUILTIN_SUFFIX(INSN, SUFFIX, FUNCTION_TYPE) \
LOONGSON_BUILTIN_ALIAS (INSN, INSN ## _ ## SUFFIX, FUNCTION_TYPE)
/* Define an MSA MIPS_BUILTIN_DIRECT pure function __builtin_msa_<INSN>
for instruction CODE_FOR_msa_<INSN>. FUNCTION_TYPE is a builtin_description
field. */
#define MSA_BUILTIN_PURE(INSN, FUNCTION_TYPE) \
{ CODE_FOR_msa_ ## INSN, MIPS_FP_COND_f, \
"__builtin_msa_" #INSN, MIPS_BUILTIN_DIRECT, \
FUNCTION_TYPE, mips_builtin_avail_msa, true }
/* Define an MSA MIPS_BUILTIN_DIRECT non-pure function __builtin_msa_<INSN>
for instruction CODE_FOR_msa_<INSN>. FUNCTION_TYPE is a builtin_description
field. */
#define MSA_BUILTIN(INSN, FUNCTION_TYPE) \
{ CODE_FOR_msa_ ## INSN, MIPS_FP_COND_f, \
"__builtin_msa_" #INSN, MIPS_BUILTIN_DIRECT, \
FUNCTION_TYPE, mips_builtin_avail_msa, false }
/* Define a remapped MSA MIPS_BUILTIN_DIRECT function __builtin_msa_<INSN>
for instruction CODE_FOR_msa_<INSN2>. FUNCTION_TYPE is
a builtin_description field. */
#define MSA_BUILTIN_REMAP(INSN, INSN2, FUNCTION_TYPE) \
{ CODE_FOR_msa_ ## INSN2, MIPS_FP_COND_f, \
"__builtin_msa_" #INSN, MIPS_BUILTIN_DIRECT, \
FUNCTION_TYPE, mips_builtin_avail_msa, false }
/* Define an MSA MIPS_BUILTIN_MSA_TEST_BRANCH function __builtin_msa_<INSN>
for instruction CODE_FOR_msa_<INSN>. FUNCTION_TYPE is a builtin_description
field. */
#define MSA_BUILTIN_TEST_BRANCH(INSN, FUNCTION_TYPE) \
{ CODE_FOR_msa_ ## INSN, MIPS_FP_COND_f, \
"__builtin_msa_" #INSN, MIPS_BUILTIN_MSA_TEST_BRANCH, \
FUNCTION_TYPE, mips_builtin_avail_msa, false }
/* Define an MSA MIPS_BUILTIN_DIRECT_NO_TARGET function __builtin_msa_<INSN>
for instruction CODE_FOR_msa_<INSN>. FUNCTION_TYPE is a builtin_description
field. */
#define MSA_NO_TARGET_BUILTIN(INSN, FUNCTION_TYPE) \
{ CODE_FOR_msa_ ## INSN, MIPS_FP_COND_f, \
"__builtin_msa_" #INSN, MIPS_BUILTIN_DIRECT_NO_TARGET, \
FUNCTION_TYPE, mips_builtin_avail_msa, false }
#define CODE_FOR_mips_sqrt_ps CODE_FOR_sqrtv2sf2
#define CODE_FOR_mips_addq_ph CODE_FOR_addv2hi3
#define CODE_FOR_mips_addu_qb CODE_FOR_addv4qi3
#define CODE_FOR_mips_subq_ph CODE_FOR_subv2hi3
#define CODE_FOR_mips_subu_qb CODE_FOR_subv4qi3
#define CODE_FOR_mips_mul_ph CODE_FOR_mulv2hi3
#define CODE_FOR_mips_mult CODE_FOR_mulsidi3_32bit
#define CODE_FOR_mips_multu CODE_FOR_umulsidi3_32bit
#define CODE_FOR_loongson_packsswh CODE_FOR_vec_pack_ssat_v2si
#define CODE_FOR_loongson_packsshb CODE_FOR_vec_pack_ssat_v4hi
#define CODE_FOR_loongson_packushb CODE_FOR_vec_pack_usat_v4hi
#define CODE_FOR_loongson_paddw CODE_FOR_addv2si3
#define CODE_FOR_loongson_paddh CODE_FOR_addv4hi3
#define CODE_FOR_loongson_paddb CODE_FOR_addv8qi3
#define CODE_FOR_loongson_paddsh CODE_FOR_ssaddv4hi3
#define CODE_FOR_loongson_paddsb CODE_FOR_ssaddv8qi3
#define CODE_FOR_loongson_paddush CODE_FOR_usaddv4hi3
#define CODE_FOR_loongson_paddusb CODE_FOR_usaddv8qi3
#define CODE_FOR_loongson_pmaxsh CODE_FOR_smaxv4hi3
#define CODE_FOR_loongson_pmaxub CODE_FOR_umaxv8qi3
#define CODE_FOR_loongson_pminsh CODE_FOR_sminv4hi3
#define CODE_FOR_loongson_pminub CODE_FOR_uminv8qi3
#define CODE_FOR_loongson_pmulhuh CODE_FOR_umulv4hi3_highpart
#define CODE_FOR_loongson_pmulhh CODE_FOR_smulv4hi3_highpart
#define CODE_FOR_loongson_pmullh CODE_FOR_mulv4hi3
#define CODE_FOR_loongson_psllh CODE_FOR_ashlv4hi3
#define CODE_FOR_loongson_psllw CODE_FOR_ashlv2si3
#define CODE_FOR_loongson_psrlh CODE_FOR_lshrv4hi3
#define CODE_FOR_loongson_psrlw CODE_FOR_lshrv2si3
#define CODE_FOR_loongson_psrah CODE_FOR_ashrv4hi3
#define CODE_FOR_loongson_psraw CODE_FOR_ashrv2si3
#define CODE_FOR_loongson_psubw CODE_FOR_subv2si3
#define CODE_FOR_loongson_psubh CODE_FOR_subv4hi3
#define CODE_FOR_loongson_psubb CODE_FOR_subv8qi3
#define CODE_FOR_loongson_psubsh CODE_FOR_sssubv4hi3
#define CODE_FOR_loongson_psubsb CODE_FOR_sssubv8qi3
#define CODE_FOR_loongson_psubush CODE_FOR_ussubv4hi3
#define CODE_FOR_loongson_psubusb CODE_FOR_ussubv8qi3
#define CODE_FOR_msa_adds_s_b CODE_FOR_ssaddv16qi3
#define CODE_FOR_msa_adds_s_h CODE_FOR_ssaddv8hi3
#define CODE_FOR_msa_adds_s_w CODE_FOR_ssaddv4si3
#define CODE_FOR_msa_adds_s_d CODE_FOR_ssaddv2di3
#define CODE_FOR_msa_adds_u_b CODE_FOR_usaddv16qi3
#define CODE_FOR_msa_adds_u_h CODE_FOR_usaddv8hi3
#define CODE_FOR_msa_adds_u_w CODE_FOR_usaddv4si3
#define CODE_FOR_msa_adds_u_d CODE_FOR_usaddv2di3
#define CODE_FOR_msa_addv_b CODE_FOR_addv16qi3
#define CODE_FOR_msa_addv_h CODE_FOR_addv8hi3
#define CODE_FOR_msa_addv_w CODE_FOR_addv4si3
#define CODE_FOR_msa_addv_d CODE_FOR_addv2di3
#define CODE_FOR_msa_addvi_b CODE_FOR_addv16qi3
#define CODE_FOR_msa_addvi_h CODE_FOR_addv8hi3
#define CODE_FOR_msa_addvi_w CODE_FOR_addv4si3
#define CODE_FOR_msa_addvi_d CODE_FOR_addv2di3
#define CODE_FOR_msa_and_v CODE_FOR_andv16qi3
#define CODE_FOR_msa_andi_b CODE_FOR_andv16qi3
#define CODE_FOR_msa_bmnz_v CODE_FOR_msa_bmnz_b
#define CODE_FOR_msa_bmnzi_b CODE_FOR_msa_bmnz_b
#define CODE_FOR_msa_bmz_v CODE_FOR_msa_bmz_b
#define CODE_FOR_msa_bmzi_b CODE_FOR_msa_bmz_b
#define CODE_FOR_msa_bnz_v CODE_FOR_msa_bnz_v_b
#define CODE_FOR_msa_bz_v CODE_FOR_msa_bz_v_b
#define CODE_FOR_msa_bsel_v CODE_FOR_msa_bsel_b
#define CODE_FOR_msa_bseli_b CODE_FOR_msa_bsel_b
#define CODE_FOR_msa_ceqi_b CODE_FOR_msa_ceq_b
#define CODE_FOR_msa_ceqi_h CODE_FOR_msa_ceq_h
#define CODE_FOR_msa_ceqi_w CODE_FOR_msa_ceq_w
#define CODE_FOR_msa_ceqi_d CODE_FOR_msa_ceq_d
#define CODE_FOR_msa_clti_s_b CODE_FOR_msa_clt_s_b
#define CODE_FOR_msa_clti_s_h CODE_FOR_msa_clt_s_h
#define CODE_FOR_msa_clti_s_w CODE_FOR_msa_clt_s_w
#define CODE_FOR_msa_clti_s_d CODE_FOR_msa_clt_s_d
#define CODE_FOR_msa_clti_u_b CODE_FOR_msa_clt_u_b
#define CODE_FOR_msa_clti_u_h CODE_FOR_msa_clt_u_h
#define CODE_FOR_msa_clti_u_w CODE_FOR_msa_clt_u_w
#define CODE_FOR_msa_clti_u_d CODE_FOR_msa_clt_u_d
#define CODE_FOR_msa_clei_s_b CODE_FOR_msa_cle_s_b
#define CODE_FOR_msa_clei_s_h CODE_FOR_msa_cle_s_h
#define CODE_FOR_msa_clei_s_w CODE_FOR_msa_cle_s_w
#define CODE_FOR_msa_clei_s_d CODE_FOR_msa_cle_s_d
#define CODE_FOR_msa_clei_u_b CODE_FOR_msa_cle_u_b
#define CODE_FOR_msa_clei_u_h CODE_FOR_msa_cle_u_h
#define CODE_FOR_msa_clei_u_w CODE_FOR_msa_cle_u_w
#define CODE_FOR_msa_clei_u_d CODE_FOR_msa_cle_u_d
#define CODE_FOR_msa_div_s_b CODE_FOR_divv16qi3
#define CODE_FOR_msa_div_s_h CODE_FOR_divv8hi3
#define CODE_FOR_msa_div_s_w CODE_FOR_divv4si3
#define CODE_FOR_msa_div_s_d CODE_FOR_divv2di3
#define CODE_FOR_msa_div_u_b CODE_FOR_udivv16qi3
#define CODE_FOR_msa_div_u_h CODE_FOR_udivv8hi3
#define CODE_FOR_msa_div_u_w CODE_FOR_udivv4si3
#define CODE_FOR_msa_div_u_d CODE_FOR_udivv2di3
#define CODE_FOR_msa_fadd_w CODE_FOR_addv4sf3
#define CODE_FOR_msa_fadd_d CODE_FOR_addv2df3
#define CODE_FOR_msa_fexdo_w CODE_FOR_vec_pack_trunc_v2df
#define CODE_FOR_msa_ftrunc_s_w CODE_FOR_fix_truncv4sfv4si2
#define CODE_FOR_msa_ftrunc_s_d CODE_FOR_fix_truncv2dfv2di2
#define CODE_FOR_msa_ftrunc_u_w CODE_FOR_fixuns_truncv4sfv4si2
#define CODE_FOR_msa_ftrunc_u_d CODE_FOR_fixuns_truncv2dfv2di2
#define CODE_FOR_msa_ffint_s_w CODE_FOR_floatv4siv4sf2
#define CODE_FOR_msa_ffint_s_d CODE_FOR_floatv2div2df2
#define CODE_FOR_msa_ffint_u_w CODE_FOR_floatunsv4siv4sf2
#define CODE_FOR_msa_ffint_u_d CODE_FOR_floatunsv2div2df2
#define CODE_FOR_msa_fsub_w CODE_FOR_subv4sf3
#define CODE_FOR_msa_fsub_d CODE_FOR_subv2df3
#define CODE_FOR_msa_fmadd_w CODE_FOR_fmav4sf4
#define CODE_FOR_msa_fmadd_d CODE_FOR_fmav2df4
#define CODE_FOR_msa_fmsub_w CODE_FOR_fnmav4sf4
#define CODE_FOR_msa_fmsub_d CODE_FOR_fnmav2df4
#define CODE_FOR_msa_fmul_w CODE_FOR_mulv4sf3
#define CODE_FOR_msa_fmul_d CODE_FOR_mulv2df3
#define CODE_FOR_msa_fdiv_w CODE_FOR_divv4sf3
#define CODE_FOR_msa_fdiv_d CODE_FOR_divv2df3
#define CODE_FOR_msa_fmax_w CODE_FOR_smaxv4sf3
#define CODE_FOR_msa_fmax_d CODE_FOR_smaxv2df3
#define CODE_FOR_msa_fmin_w CODE_FOR_sminv4sf3
#define CODE_FOR_msa_fmin_d CODE_FOR_sminv2df3
#define CODE_FOR_msa_fsqrt_w CODE_FOR_sqrtv4sf2
#define CODE_FOR_msa_fsqrt_d CODE_FOR_sqrtv2df2
#define CODE_FOR_msa_max_s_b CODE_FOR_smaxv16qi3
#define CODE_FOR_msa_max_s_h CODE_FOR_smaxv8hi3
#define CODE_FOR_msa_max_s_w CODE_FOR_smaxv4si3
#define CODE_FOR_msa_max_s_d CODE_FOR_smaxv2di3
#define CODE_FOR_msa_maxi_s_b CODE_FOR_smaxv16qi3
#define CODE_FOR_msa_maxi_s_h CODE_FOR_smaxv8hi3
#define CODE_FOR_msa_maxi_s_w CODE_FOR_smaxv4si3
#define CODE_FOR_msa_maxi_s_d CODE_FOR_smaxv2di3
#define CODE_FOR_msa_max_u_b CODE_FOR_umaxv16qi3
#define CODE_FOR_msa_max_u_h CODE_FOR_umaxv8hi3
#define CODE_FOR_msa_max_u_w CODE_FOR_umaxv4si3
#define CODE_FOR_msa_max_u_d CODE_FOR_umaxv2di3
#define CODE_FOR_msa_maxi_u_b CODE_FOR_umaxv16qi3
#define CODE_FOR_msa_maxi_u_h CODE_FOR_umaxv8hi3
#define CODE_FOR_msa_maxi_u_w CODE_FOR_umaxv4si3
#define CODE_FOR_msa_maxi_u_d CODE_FOR_umaxv2di3
#define CODE_FOR_msa_min_s_b CODE_FOR_sminv16qi3
#define CODE_FOR_msa_min_s_h CODE_FOR_sminv8hi3
#define CODE_FOR_msa_min_s_w CODE_FOR_sminv4si3
#define CODE_FOR_msa_min_s_d CODE_FOR_sminv2di3
#define CODE_FOR_msa_mini_s_b CODE_FOR_sminv16qi3
#define CODE_FOR_msa_mini_s_h CODE_FOR_sminv8hi3
#define CODE_FOR_msa_mini_s_w CODE_FOR_sminv4si3
#define CODE_FOR_msa_mini_s_d CODE_FOR_sminv2di3
#define CODE_FOR_msa_min_u_b CODE_FOR_uminv16qi3
#define CODE_FOR_msa_min_u_h CODE_FOR_uminv8hi3
#define CODE_FOR_msa_min_u_w CODE_FOR_uminv4si3
#define CODE_FOR_msa_min_u_d CODE_FOR_uminv2di3
#define CODE_FOR_msa_mini_u_b CODE_FOR_uminv16qi3
#define CODE_FOR_msa_mini_u_h CODE_FOR_uminv8hi3
#define CODE_FOR_msa_mini_u_w CODE_FOR_uminv4si3
#define CODE_FOR_msa_mini_u_d CODE_FOR_uminv2di3
#define CODE_FOR_msa_mod_s_b CODE_FOR_modv16qi3
#define CODE_FOR_msa_mod_s_h CODE_FOR_modv8hi3
#define CODE_FOR_msa_mod_s_w CODE_FOR_modv4si3
#define CODE_FOR_msa_mod_s_d CODE_FOR_modv2di3
#define CODE_FOR_msa_mod_u_b CODE_FOR_umodv16qi3
#define CODE_FOR_msa_mod_u_h CODE_FOR_umodv8hi3
#define CODE_FOR_msa_mod_u_w CODE_FOR_umodv4si3
#define CODE_FOR_msa_mod_u_d CODE_FOR_umodv2di3
#define CODE_FOR_msa_mod_s_b CODE_FOR_modv16qi3
#define CODE_FOR_msa_mod_s_h CODE_FOR_modv8hi3
#define CODE_FOR_msa_mod_s_w CODE_FOR_modv4si3
#define CODE_FOR_msa_mod_s_d CODE_FOR_modv2di3
#define CODE_FOR_msa_mod_u_b CODE_FOR_umodv16qi3
#define CODE_FOR_msa_mod_u_h CODE_FOR_umodv8hi3
#define CODE_FOR_msa_mod_u_w CODE_FOR_umodv4si3
#define CODE_FOR_msa_mod_u_d CODE_FOR_umodv2di3
#define CODE_FOR_msa_mulv_b CODE_FOR_mulv16qi3
#define CODE_FOR_msa_mulv_h CODE_FOR_mulv8hi3
#define CODE_FOR_msa_mulv_w CODE_FOR_mulv4si3
#define CODE_FOR_msa_mulv_d CODE_FOR_mulv2di3
#define CODE_FOR_msa_nlzc_b CODE_FOR_clzv16qi2
#define CODE_FOR_msa_nlzc_h CODE_FOR_clzv8hi2
#define CODE_FOR_msa_nlzc_w CODE_FOR_clzv4si2
#define CODE_FOR_msa_nlzc_d CODE_FOR_clzv2di2
#define CODE_FOR_msa_nor_v CODE_FOR_msa_nor_b
#define CODE_FOR_msa_or_v CODE_FOR_iorv16qi3
#define CODE_FOR_msa_ori_b CODE_FOR_iorv16qi3
#define CODE_FOR_msa_nori_b CODE_FOR_msa_nor_b
#define CODE_FOR_msa_pcnt_b CODE_FOR_popcountv16qi2
#define CODE_FOR_msa_pcnt_h CODE_FOR_popcountv8hi2
#define CODE_FOR_msa_pcnt_w CODE_FOR_popcountv4si2
#define CODE_FOR_msa_pcnt_d CODE_FOR_popcountv2di2
#define CODE_FOR_msa_xor_v CODE_FOR_xorv16qi3
#define CODE_FOR_msa_xori_b CODE_FOR_xorv16qi3
#define CODE_FOR_msa_sll_b CODE_FOR_vashlv16qi3
#define CODE_FOR_msa_sll_h CODE_FOR_vashlv8hi3
#define CODE_FOR_msa_sll_w CODE_FOR_vashlv4si3
#define CODE_FOR_msa_sll_d CODE_FOR_vashlv2di3
#define CODE_FOR_msa_slli_b CODE_FOR_vashlv16qi3
#define CODE_FOR_msa_slli_h CODE_FOR_vashlv8hi3
#define CODE_FOR_msa_slli_w CODE_FOR_vashlv4si3
#define CODE_FOR_msa_slli_d CODE_FOR_vashlv2di3
#define CODE_FOR_msa_sra_b CODE_FOR_vashrv16qi3
#define CODE_FOR_msa_sra_h CODE_FOR_vashrv8hi3
#define CODE_FOR_msa_sra_w CODE_FOR_vashrv4si3
#define CODE_FOR_msa_sra_d CODE_FOR_vashrv2di3
#define CODE_FOR_msa_srai_b CODE_FOR_vashrv16qi3
#define CODE_FOR_msa_srai_h CODE_FOR_vashrv8hi3
#define CODE_FOR_msa_srai_w CODE_FOR_vashrv4si3
#define CODE_FOR_msa_srai_d CODE_FOR_vashrv2di3
#define CODE_FOR_msa_srl_b CODE_FOR_vlshrv16qi3
#define CODE_FOR_msa_srl_h CODE_FOR_vlshrv8hi3
#define CODE_FOR_msa_srl_w CODE_FOR_vlshrv4si3
#define CODE_FOR_msa_srl_d CODE_FOR_vlshrv2di3
#define CODE_FOR_msa_srli_b CODE_FOR_vlshrv16qi3
#define CODE_FOR_msa_srli_h CODE_FOR_vlshrv8hi3
#define CODE_FOR_msa_srli_w CODE_FOR_vlshrv4si3
#define CODE_FOR_msa_srli_d CODE_FOR_vlshrv2di3
#define CODE_FOR_msa_subv_b CODE_FOR_subv16qi3
#define CODE_FOR_msa_subv_h CODE_FOR_subv8hi3
#define CODE_FOR_msa_subv_w CODE_FOR_subv4si3
#define CODE_FOR_msa_subv_d CODE_FOR_subv2di3
#define CODE_FOR_msa_subvi_b CODE_FOR_subv16qi3
#define CODE_FOR_msa_subvi_h CODE_FOR_subv8hi3
#define CODE_FOR_msa_subvi_w CODE_FOR_subv4si3
#define CODE_FOR_msa_subvi_d CODE_FOR_subv2di3
#define CODE_FOR_msa_move_v CODE_FOR_movv16qi
#define CODE_FOR_msa_vshf_b CODE_FOR_vec_permv16qi
#define CODE_FOR_msa_vshf_h CODE_FOR_vec_permv8hi
#define CODE_FOR_msa_vshf_w CODE_FOR_vec_permv4si
#define CODE_FOR_msa_vshf_d CODE_FOR_vec_permv2di
#define CODE_FOR_msa_ilvod_d CODE_FOR_msa_ilvl_d
#define CODE_FOR_msa_ilvev_d CODE_FOR_msa_ilvr_d
#define CODE_FOR_msa_pckod_d CODE_FOR_msa_ilvl_d
#define CODE_FOR_msa_pckev_d CODE_FOR_msa_ilvr_d
#define CODE_FOR_msa_ldi_b CODE_FOR_msa_ldiv16qi
#define CODE_FOR_msa_ldi_h CODE_FOR_msa_ldiv8hi
#define CODE_FOR_msa_ldi_w CODE_FOR_msa_ldiv4si
#define CODE_FOR_msa_ldi_d CODE_FOR_msa_ldiv2di
static const struct mips_builtin_description mips_builtins[] = {
#define MIPS_GET_FCSR 0
DIRECT_BUILTIN (get_fcsr, MIPS_USI_FTYPE_VOID, hard_float),
#define MIPS_SET_FCSR 1
DIRECT_NO_TARGET_BUILTIN (set_fcsr, MIPS_VOID_FTYPE_USI, hard_float),
DIRECT_BUILTIN_PURE (pll_ps, MIPS_V2SF_FTYPE_V2SF_V2SF, paired_single),
DIRECT_BUILTIN_PURE (pul_ps, MIPS_V2SF_FTYPE_V2SF_V2SF, paired_single),
DIRECT_BUILTIN_PURE (plu_ps, MIPS_V2SF_FTYPE_V2SF_V2SF, paired_single),
DIRECT_BUILTIN_PURE (puu_ps, MIPS_V2SF_FTYPE_V2SF_V2SF, paired_single),
DIRECT_BUILTIN_PURE (cvt_ps_s, MIPS_V2SF_FTYPE_SF_SF, paired_single),
DIRECT_BUILTIN_PURE (cvt_s_pl, MIPS_SF_FTYPE_V2SF, paired_single),
DIRECT_BUILTIN_PURE (cvt_s_pu, MIPS_SF_FTYPE_V2SF, paired_single),
DIRECT_BUILTIN_PURE (abs_ps, MIPS_V2SF_FTYPE_V2SF, paired_single),
DIRECT_BUILTIN_PURE (alnv_ps, MIPS_V2SF_FTYPE_V2SF_V2SF_INT, paired_single),
DIRECT_BUILTIN_PURE (addr_ps, MIPS_V2SF_FTYPE_V2SF_V2SF, mips3d),
DIRECT_BUILTIN_PURE (mulr_ps, MIPS_V2SF_FTYPE_V2SF_V2SF, mips3d),
DIRECT_BUILTIN_PURE (cvt_pw_ps, MIPS_V2SF_FTYPE_V2SF, mips3d),
DIRECT_BUILTIN_PURE (cvt_ps_pw, MIPS_V2SF_FTYPE_V2SF, mips3d),
DIRECT_BUILTIN_PURE (recip1_s, MIPS_SF_FTYPE_SF, mips3d),
DIRECT_BUILTIN_PURE (recip1_d, MIPS_DF_FTYPE_DF, mips3d),
DIRECT_BUILTIN_PURE (recip1_ps, MIPS_V2SF_FTYPE_V2SF, mips3d),
DIRECT_BUILTIN_PURE (recip2_s, MIPS_SF_FTYPE_SF_SF, mips3d),
DIRECT_BUILTIN_PURE (recip2_d, MIPS_DF_FTYPE_DF_DF, mips3d),
DIRECT_BUILTIN_PURE (recip2_ps, MIPS_V2SF_FTYPE_V2SF_V2SF, mips3d),
DIRECT_BUILTIN_PURE (rsqrt1_s, MIPS_SF_FTYPE_SF, mips3d),
DIRECT_BUILTIN_PURE (rsqrt1_d, MIPS_DF_FTYPE_DF, mips3d),
DIRECT_BUILTIN_PURE (rsqrt1_ps, MIPS_V2SF_FTYPE_V2SF, mips3d),
DIRECT_BUILTIN_PURE (rsqrt2_s, MIPS_SF_FTYPE_SF_SF, mips3d),
DIRECT_BUILTIN_PURE (rsqrt2_d, MIPS_DF_FTYPE_DF_DF, mips3d),
DIRECT_BUILTIN_PURE (rsqrt2_ps, MIPS_V2SF_FTYPE_V2SF_V2SF, mips3d),
MIPS_FP_CONDITIONS (CMP_BUILTINS),
/* Built-in functions for the SB-1 processor. */
DIRECT_BUILTIN (sqrt_ps, MIPS_V2SF_FTYPE_V2SF, sb1_paired_single),
/* Built-in functions for the DSP ASE (32-bit and 64-bit). */
DIRECT_BUILTIN_PURE (addq_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dsp),
DIRECT_BUILTIN_PURE (addq_s_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dsp),
DIRECT_BUILTIN_PURE (addq_s_w, MIPS_SI_FTYPE_SI_SI, dsp),
DIRECT_BUILTIN_PURE (addu_qb, MIPS_V4QI_FTYPE_V4QI_V4QI, dsp),
DIRECT_BUILTIN_PURE (addu_s_qb, MIPS_V4QI_FTYPE_V4QI_V4QI, dsp),
DIRECT_BUILTIN_PURE (subq_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dsp),
DIRECT_BUILTIN_PURE (subq_s_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dsp),
DIRECT_BUILTIN_PURE (subq_s_w, MIPS_SI_FTYPE_SI_SI, dsp),
DIRECT_BUILTIN_PURE (subu_qb, MIPS_V4QI_FTYPE_V4QI_V4QI, dsp),
DIRECT_BUILTIN_PURE (subu_s_qb, MIPS_V4QI_FTYPE_V4QI_V4QI, dsp),
DIRECT_BUILTIN_PURE (addsc, MIPS_SI_FTYPE_SI_SI, dsp),
DIRECT_BUILTIN_PURE (addwc, MIPS_SI_FTYPE_SI_SI, dsp),
DIRECT_BUILTIN_PURE (modsub, MIPS_SI_FTYPE_SI_SI, dsp),
DIRECT_BUILTIN_PURE (raddu_w_qb, MIPS_SI_FTYPE_V4QI, dsp),
DIRECT_BUILTIN_PURE (absq_s_ph, MIPS_V2HI_FTYPE_V2HI, dsp),
DIRECT_BUILTIN_PURE (absq_s_w, MIPS_SI_FTYPE_SI, dsp),
DIRECT_BUILTIN_PURE (precrq_qb_ph, MIPS_V4QI_FTYPE_V2HI_V2HI, dsp),
DIRECT_BUILTIN_PURE (precrq_ph_w, MIPS_V2HI_FTYPE_SI_SI, dsp),
DIRECT_BUILTIN_PURE (precrq_rs_ph_w, MIPS_V2HI_FTYPE_SI_SI, dsp),
DIRECT_BUILTIN_PURE (precrqu_s_qb_ph, MIPS_V4QI_FTYPE_V2HI_V2HI, dsp),
DIRECT_BUILTIN_PURE (preceq_w_phl, MIPS_SI_FTYPE_V2HI, dsp),
DIRECT_BUILTIN_PURE (preceq_w_phr, MIPS_SI_FTYPE_V2HI, dsp),
DIRECT_BUILTIN_PURE (precequ_ph_qbl, MIPS_V2HI_FTYPE_V4QI, dsp),
DIRECT_BUILTIN_PURE (precequ_ph_qbr, MIPS_V2HI_FTYPE_V4QI, dsp),
DIRECT_BUILTIN_PURE (precequ_ph_qbla, MIPS_V2HI_FTYPE_V4QI, dsp),
DIRECT_BUILTIN_PURE (precequ_ph_qbra, MIPS_V2HI_FTYPE_V4QI, dsp),
DIRECT_BUILTIN_PURE (preceu_ph_qbl, MIPS_V2HI_FTYPE_V4QI, dsp),
DIRECT_BUILTIN_PURE (preceu_ph_qbr, MIPS_V2HI_FTYPE_V4QI, dsp),
DIRECT_BUILTIN_PURE (preceu_ph_qbla, MIPS_V2HI_FTYPE_V4QI, dsp),
DIRECT_BUILTIN_PURE (preceu_ph_qbra, MIPS_V2HI_FTYPE_V4QI, dsp),
DIRECT_BUILTIN_PURE (shll_qb, MIPS_V4QI_FTYPE_V4QI_SI, dsp),
DIRECT_BUILTIN_PURE (shll_ph, MIPS_V2HI_FTYPE_V2HI_SI, dsp),
DIRECT_BUILTIN_PURE (shll_s_ph, MIPS_V2HI_FTYPE_V2HI_SI, dsp),
DIRECT_BUILTIN_PURE (shll_s_w, MIPS_SI_FTYPE_SI_SI, dsp),
DIRECT_BUILTIN_PURE (shrl_qb, MIPS_V4QI_FTYPE_V4QI_SI, dsp),
DIRECT_BUILTIN_PURE (shra_ph, MIPS_V2HI_FTYPE_V2HI_SI, dsp),
DIRECT_BUILTIN_PURE (shra_r_ph, MIPS_V2HI_FTYPE_V2HI_SI, dsp),
DIRECT_BUILTIN_PURE (shra_r_w, MIPS_SI_FTYPE_SI_SI, dsp),
DIRECT_BUILTIN_PURE (muleu_s_ph_qbl, MIPS_V2HI_FTYPE_V4QI_V2HI, dsp),
DIRECT_BUILTIN_PURE (muleu_s_ph_qbr, MIPS_V2HI_FTYPE_V4QI_V2HI, dsp),
DIRECT_BUILTIN_PURE (mulq_rs_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dsp),
DIRECT_BUILTIN_PURE (muleq_s_w_phl, MIPS_SI_FTYPE_V2HI_V2HI, dsp),
DIRECT_BUILTIN_PURE (muleq_s_w_phr, MIPS_SI_FTYPE_V2HI_V2HI, dsp),
DIRECT_BUILTIN_PURE (bitrev, MIPS_SI_FTYPE_SI, dsp),
DIRECT_BUILTIN_PURE (insv, MIPS_SI_FTYPE_SI_SI, dsp),
DIRECT_BUILTIN_PURE (repl_qb, MIPS_V4QI_FTYPE_SI, dsp),
DIRECT_BUILTIN_PURE (repl_ph, MIPS_V2HI_FTYPE_SI, dsp),
DIRECT_NO_TARGET_BUILTIN (cmpu_eq_qb, MIPS_VOID_FTYPE_V4QI_V4QI, dsp),
DIRECT_NO_TARGET_BUILTIN (cmpu_lt_qb, MIPS_VOID_FTYPE_V4QI_V4QI, dsp),
DIRECT_NO_TARGET_BUILTIN (cmpu_le_qb, MIPS_VOID_FTYPE_V4QI_V4QI, dsp),
DIRECT_BUILTIN_PURE (cmpgu_eq_qb, MIPS_SI_FTYPE_V4QI_V4QI, dsp),
DIRECT_BUILTIN_PURE (cmpgu_lt_qb, MIPS_SI_FTYPE_V4QI_V4QI, dsp),
DIRECT_BUILTIN_PURE (cmpgu_le_qb, MIPS_SI_FTYPE_V4QI_V4QI, dsp),
DIRECT_NO_TARGET_BUILTIN (cmp_eq_ph, MIPS_VOID_FTYPE_V2HI_V2HI, dsp),
DIRECT_NO_TARGET_BUILTIN (cmp_lt_ph, MIPS_VOID_FTYPE_V2HI_V2HI, dsp),
DIRECT_NO_TARGET_BUILTIN (cmp_le_ph, MIPS_VOID_FTYPE_V2HI_V2HI, dsp),
DIRECT_BUILTIN_PURE (pick_qb, MIPS_V4QI_FTYPE_V4QI_V4QI, dsp),
DIRECT_BUILTIN_PURE (pick_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dsp),
DIRECT_BUILTIN_PURE (packrl_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dsp),
DIRECT_NO_TARGET_BUILTIN (wrdsp, MIPS_VOID_FTYPE_SI_SI, dsp),
DIRECT_BUILTIN_PURE (rddsp, MIPS_SI_FTYPE_SI, dsp),
DIRECT_BUILTIN (lbux, MIPS_SI_FTYPE_POINTER_SI, dsp),
DIRECT_BUILTIN (lhx, MIPS_SI_FTYPE_POINTER_SI, dsp),
DIRECT_BUILTIN (lwx, MIPS_SI_FTYPE_POINTER_SI, dsp),
BPOSGE_BUILTIN (32, dsp),
/* The following are for the MIPS DSP ASE REV 2 (32-bit and 64-bit). */
DIRECT_BUILTIN_PURE (absq_s_qb, MIPS_V4QI_FTYPE_V4QI, dspr2),
DIRECT_BUILTIN_PURE (addu_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dspr2),
DIRECT_BUILTIN_PURE (addu_s_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dspr2),
DIRECT_BUILTIN_PURE (adduh_qb, MIPS_V4QI_FTYPE_V4QI_V4QI, dspr2),
DIRECT_BUILTIN_PURE (adduh_r_qb, MIPS_V4QI_FTYPE_V4QI_V4QI, dspr2),
DIRECT_BUILTIN_PURE (append, MIPS_SI_FTYPE_SI_SI_SI, dspr2),
DIRECT_BUILTIN_PURE (balign, MIPS_SI_FTYPE_SI_SI_SI, dspr2),
DIRECT_BUILTIN_PURE (cmpgdu_eq_qb, MIPS_SI_FTYPE_V4QI_V4QI, dspr2),
DIRECT_BUILTIN_PURE (cmpgdu_lt_qb, MIPS_SI_FTYPE_V4QI_V4QI, dspr2),
DIRECT_BUILTIN_PURE (cmpgdu_le_qb, MIPS_SI_FTYPE_V4QI_V4QI, dspr2),
DIRECT_BUILTIN_PURE (mul_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dspr2),
DIRECT_BUILTIN_PURE (mul_s_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dspr2),
DIRECT_BUILTIN_PURE (mulq_rs_w, MIPS_SI_FTYPE_SI_SI, dspr2),
DIRECT_BUILTIN_PURE (mulq_s_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dspr2),
DIRECT_BUILTIN_PURE (mulq_s_w, MIPS_SI_FTYPE_SI_SI, dspr2),
DIRECT_BUILTIN_PURE (precr_qb_ph, MIPS_V4QI_FTYPE_V2HI_V2HI, dspr2),
DIRECT_BUILTIN_PURE (precr_sra_ph_w, MIPS_V2HI_FTYPE_SI_SI_SI, dspr2),
DIRECT_BUILTIN_PURE (precr_sra_r_ph_w, MIPS_V2HI_FTYPE_SI_SI_SI, dspr2),
DIRECT_BUILTIN_PURE (prepend, MIPS_SI_FTYPE_SI_SI_SI, dspr2),
DIRECT_BUILTIN_PURE (shra_qb, MIPS_V4QI_FTYPE_V4QI_SI, dspr2),
DIRECT_BUILTIN_PURE (shra_r_qb, MIPS_V4QI_FTYPE_V4QI_SI, dspr2),
DIRECT_BUILTIN_PURE (shrl_ph, MIPS_V2HI_FTYPE_V2HI_SI, dspr2),
DIRECT_BUILTIN_PURE (subu_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dspr2),
DIRECT_BUILTIN_PURE (subu_s_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dspr2),
DIRECT_BUILTIN_PURE (subuh_qb, MIPS_V4QI_FTYPE_V4QI_V4QI, dspr2),
DIRECT_BUILTIN_PURE (subuh_r_qb, MIPS_V4QI_FTYPE_V4QI_V4QI, dspr2),
DIRECT_BUILTIN_PURE (addqh_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dspr2),
DIRECT_BUILTIN_PURE (addqh_r_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dspr2),
DIRECT_BUILTIN_PURE (addqh_w, MIPS_SI_FTYPE_SI_SI, dspr2),
DIRECT_BUILTIN_PURE (addqh_r_w, MIPS_SI_FTYPE_SI_SI, dspr2),
DIRECT_BUILTIN_PURE (subqh_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dspr2),
DIRECT_BUILTIN_PURE (subqh_r_ph, MIPS_V2HI_FTYPE_V2HI_V2HI, dspr2),
DIRECT_BUILTIN_PURE (subqh_w, MIPS_SI_FTYPE_SI_SI, dspr2),
DIRECT_BUILTIN_PURE (subqh_r_w, MIPS_SI_FTYPE_SI_SI, dspr2),
/* Built-in functions for the DSP ASE (32-bit only). */
DIRECT_BUILTIN_PURE (dpau_h_qbl, MIPS_DI_FTYPE_DI_V4QI_V4QI, dsp_32),
DIRECT_BUILTIN_PURE (dpau_h_qbr, MIPS_DI_FTYPE_DI_V4QI_V4QI, dsp_32),
DIRECT_BUILTIN_PURE (dpsu_h_qbl, MIPS_DI_FTYPE_DI_V4QI_V4QI, dsp_32),
DIRECT_BUILTIN_PURE (dpsu_h_qbr, MIPS_DI_FTYPE_DI_V4QI_V4QI, dsp_32),
DIRECT_BUILTIN_PURE (dpaq_s_w_ph, MIPS_DI_FTYPE_DI_V2HI_V2HI, dsp_32),
DIRECT_BUILTIN_PURE (dpsq_s_w_ph, MIPS_DI_FTYPE_DI_V2HI_V2HI, dsp_32),
DIRECT_BUILTIN_PURE (mulsaq_s_w_ph, MIPS_DI_FTYPE_DI_V2HI_V2HI, dsp_32),
DIRECT_BUILTIN_PURE (dpaq_sa_l_w, MIPS_DI_FTYPE_DI_SI_SI, dsp_32),
DIRECT_BUILTIN_PURE (dpsq_sa_l_w, MIPS_DI_FTYPE_DI_SI_SI, dsp_32),
DIRECT_BUILTIN_PURE (maq_s_w_phl, MIPS_DI_FTYPE_DI_V2HI_V2HI, dsp_32),
DIRECT_BUILTIN_PURE (maq_s_w_phr, MIPS_DI_FTYPE_DI_V2HI_V2HI, dsp_32),
DIRECT_BUILTIN_PURE (maq_sa_w_phl, MIPS_DI_FTYPE_DI_V2HI_V2HI, dsp_32),
DIRECT_BUILTIN_PURE (maq_sa_w_phr, MIPS_DI_FTYPE_DI_V2HI_V2HI, dsp_32),
DIRECT_BUILTIN_PURE (extr_w, MIPS_SI_FTYPE_DI_SI, dsp_32),
DIRECT_BUILTIN_PURE (extr_r_w, MIPS_SI_FTYPE_DI_SI, dsp_32),
DIRECT_BUILTIN_PURE (extr_rs_w, MIPS_SI_FTYPE_DI_SI, dsp_32),
DIRECT_BUILTIN_PURE (extr_s_h, MIPS_SI_FTYPE_DI_SI, dsp_32),
DIRECT_BUILTIN_PURE (extp, MIPS_SI_FTYPE_DI_SI, dsp_32),
DIRECT_BUILTIN_PURE (extpdp, MIPS_SI_FTYPE_DI_SI, dsp_32),
DIRECT_BUILTIN_PURE (shilo, MIPS_DI_FTYPE_DI_SI, dsp_32),
DIRECT_BUILTIN_PURE (mthlip, MIPS_DI_FTYPE_DI_SI, dsp_32),
DIRECT_BUILTIN_PURE (madd, MIPS_DI_FTYPE_DI_SI_SI, dsp_32),
DIRECT_BUILTIN_PURE (maddu, MIPS_DI_FTYPE_DI_USI_USI, dsp_32),
DIRECT_BUILTIN_PURE (msub, MIPS_DI_FTYPE_DI_SI_SI, dsp_32),
DIRECT_BUILTIN_PURE (msubu, MIPS_DI_FTYPE_DI_USI_USI, dsp_32),
DIRECT_BUILTIN_PURE (mult, MIPS_DI_FTYPE_SI_SI, dsp_32),
DIRECT_BUILTIN_PURE (multu, MIPS_DI_FTYPE_USI_USI, dsp_32),
/* Built-in functions for the DSP ASE (64-bit only). */
DIRECT_BUILTIN (ldx, MIPS_DI_FTYPE_POINTER_SI, dsp_64),
/* The following are for the MIPS DSP ASE REV 2 (32-bit only). */
DIRECT_BUILTIN_PURE (dpa_w_ph, MIPS_DI_FTYPE_DI_V2HI_V2HI, dspr2_32),
DIRECT_BUILTIN_PURE (dps_w_ph, MIPS_DI_FTYPE_DI_V2HI_V2HI, dspr2_32),
DIRECT_BUILTIN_PURE (mulsa_w_ph, MIPS_DI_FTYPE_DI_V2HI_V2HI, dspr2_32),
DIRECT_BUILTIN_PURE (dpax_w_ph, MIPS_DI_FTYPE_DI_V2HI_V2HI, dspr2_32),
DIRECT_BUILTIN_PURE (dpsx_w_ph, MIPS_DI_FTYPE_DI_V2HI_V2HI, dspr2_32),
DIRECT_BUILTIN_PURE (dpaqx_s_w_ph, MIPS_DI_FTYPE_DI_V2HI_V2HI, dspr2_32),
DIRECT_BUILTIN_PURE (dpaqx_sa_w_ph, MIPS_DI_FTYPE_DI_V2HI_V2HI, dspr2_32),
DIRECT_BUILTIN_PURE (dpsqx_s_w_ph, MIPS_DI_FTYPE_DI_V2HI_V2HI, dspr2_32),
DIRECT_BUILTIN_PURE (dpsqx_sa_w_ph, MIPS_DI_FTYPE_DI_V2HI_V2HI, dspr2_32),
/* Builtin functions for ST Microelectronics Loongson-2E/2F cores. */
LOONGSON_BUILTIN (packsswh, MIPS_V4HI_FTYPE_V2SI_V2SI),
LOONGSON_BUILTIN (packsshb, MIPS_V8QI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN (packushb, MIPS_UV8QI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN_SUFFIX (paddw, u, MIPS_UV2SI_FTYPE_UV2SI_UV2SI),
LOONGSON_BUILTIN_SUFFIX (paddh, u, MIPS_UV4HI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN_SUFFIX (paddb, u, MIPS_UV8QI_FTYPE_UV8QI_UV8QI),
LOONGSON_BUILTIN_SUFFIX (paddw, s, MIPS_V2SI_FTYPE_V2SI_V2SI),
LOONGSON_BUILTIN_SUFFIX (paddh, s, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN_SUFFIX (paddb, s, MIPS_V8QI_FTYPE_V8QI_V8QI),
LOONGSON_BUILTIN_SUFFIX (paddd, u, MIPS_UDI_FTYPE_UDI_UDI),
LOONGSON_BUILTIN_SUFFIX (paddd, s, MIPS_DI_FTYPE_DI_DI),
LOONGSON_BUILTIN (paddsh, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN (paddsb, MIPS_V8QI_FTYPE_V8QI_V8QI),
LOONGSON_BUILTIN (paddush, MIPS_UV4HI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN (paddusb, MIPS_UV8QI_FTYPE_UV8QI_UV8QI),
LOONGSON_BUILTIN_ALIAS (pandn_d, pandn_ud, MIPS_UDI_FTYPE_UDI_UDI),
LOONGSON_BUILTIN_ALIAS (pandn_w, pandn_uw, MIPS_UV2SI_FTYPE_UV2SI_UV2SI),
LOONGSON_BUILTIN_ALIAS (pandn_h, pandn_uh, MIPS_UV4HI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN_ALIAS (pandn_b, pandn_ub, MIPS_UV8QI_FTYPE_UV8QI_UV8QI),
LOONGSON_BUILTIN_ALIAS (pandn_d, pandn_sd, MIPS_DI_FTYPE_DI_DI),
LOONGSON_BUILTIN_ALIAS (pandn_w, pandn_sw, MIPS_V2SI_FTYPE_V2SI_V2SI),
LOONGSON_BUILTIN_ALIAS (pandn_h, pandn_sh, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN_ALIAS (pandn_b, pandn_sb, MIPS_V8QI_FTYPE_V8QI_V8QI),
LOONGSON_BUILTIN (pavgh, MIPS_UV4HI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN (pavgb, MIPS_UV8QI_FTYPE_UV8QI_UV8QI),
LOONGSON_BUILTIN_SUFFIX (pcmpeqw, u, MIPS_UV2SI_FTYPE_UV2SI_UV2SI),
LOONGSON_BUILTIN_SUFFIX (pcmpeqh, u, MIPS_UV4HI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN_SUFFIX (pcmpeqb, u, MIPS_UV8QI_FTYPE_UV8QI_UV8QI),
LOONGSON_BUILTIN_SUFFIX (pcmpeqw, s, MIPS_V2SI_FTYPE_V2SI_V2SI),
LOONGSON_BUILTIN_SUFFIX (pcmpeqh, s, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN_SUFFIX (pcmpeqb, s, MIPS_V8QI_FTYPE_V8QI_V8QI),
LOONGSON_BUILTIN_SUFFIX (pcmpgtw, u, MIPS_UV2SI_FTYPE_UV2SI_UV2SI),
LOONGSON_BUILTIN_SUFFIX (pcmpgth, u, MIPS_UV4HI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN_SUFFIX (pcmpgtb, u, MIPS_UV8QI_FTYPE_UV8QI_UV8QI),
LOONGSON_BUILTIN_SUFFIX (pcmpgtw, s, MIPS_V2SI_FTYPE_V2SI_V2SI),
LOONGSON_BUILTIN_SUFFIX (pcmpgth, s, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN_SUFFIX (pcmpgtb, s, MIPS_V8QI_FTYPE_V8QI_V8QI),
LOONGSON_BUILTIN_SUFFIX (pextrh, u, MIPS_UV4HI_FTYPE_UV4HI_USI),
LOONGSON_BUILTIN_SUFFIX (pextrh, s, MIPS_V4HI_FTYPE_V4HI_USI),
LOONGSON_BUILTIN_SUFFIX (pinsrh_0, u, MIPS_UV4HI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN_SUFFIX (pinsrh_1, u, MIPS_UV4HI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN_SUFFIX (pinsrh_2, u, MIPS_UV4HI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN_SUFFIX (pinsrh_3, u, MIPS_UV4HI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN_SUFFIX (pinsrh_0, s, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN_SUFFIX (pinsrh_1, s, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN_SUFFIX (pinsrh_2, s, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN_SUFFIX (pinsrh_3, s, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN (pmaddhw, MIPS_V2SI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN (pmaxsh, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN (pmaxub, MIPS_UV8QI_FTYPE_UV8QI_UV8QI),
LOONGSON_BUILTIN (pminsh, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN (pminub, MIPS_UV8QI_FTYPE_UV8QI_UV8QI),
LOONGSON_BUILTIN_SUFFIX (pmovmskb, u, MIPS_UV8QI_FTYPE_UV8QI),
LOONGSON_BUILTIN_SUFFIX (pmovmskb, s, MIPS_V8QI_FTYPE_V8QI),
LOONGSON_BUILTIN (pmulhuh, MIPS_UV4HI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN (pmulhh, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN (pmullh, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN (pmuluw, MIPS_UDI_FTYPE_UV2SI_UV2SI),
LOONGSON_BUILTIN (pasubub, MIPS_UV8QI_FTYPE_UV8QI_UV8QI),
LOONGSON_BUILTIN (biadd, MIPS_UV4HI_FTYPE_UV8QI),
LOONGSON_BUILTIN (psadbh, MIPS_UV4HI_FTYPE_UV8QI_UV8QI),
LOONGSON_BUILTIN_SUFFIX (pshufh, u, MIPS_UV4HI_FTYPE_UV4HI_UQI),
LOONGSON_BUILTIN_SUFFIX (pshufh, s, MIPS_V4HI_FTYPE_V4HI_UQI),
LOONGSON_BUILTIN_SUFFIX (psllh, u, MIPS_UV4HI_FTYPE_UV4HI_UQI),
LOONGSON_BUILTIN_SUFFIX (psllh, s, MIPS_V4HI_FTYPE_V4HI_UQI),
LOONGSON_BUILTIN_SUFFIX (psllw, u, MIPS_UV2SI_FTYPE_UV2SI_UQI),
LOONGSON_BUILTIN_SUFFIX (psllw, s, MIPS_V2SI_FTYPE_V2SI_UQI),
LOONGSON_BUILTIN_SUFFIX (psrah, u, MIPS_UV4HI_FTYPE_UV4HI_UQI),
LOONGSON_BUILTIN_SUFFIX (psrah, s, MIPS_V4HI_FTYPE_V4HI_UQI),
LOONGSON_BUILTIN_SUFFIX (psraw, u, MIPS_UV2SI_FTYPE_UV2SI_UQI),
LOONGSON_BUILTIN_SUFFIX (psraw, s, MIPS_V2SI_FTYPE_V2SI_UQI),
LOONGSON_BUILTIN_SUFFIX (psrlh, u, MIPS_UV4HI_FTYPE_UV4HI_UQI),
LOONGSON_BUILTIN_SUFFIX (psrlh, s, MIPS_V4HI_FTYPE_V4HI_UQI),
LOONGSON_BUILTIN_SUFFIX (psrlw, u, MIPS_UV2SI_FTYPE_UV2SI_UQI),
LOONGSON_BUILTIN_SUFFIX (psrlw, s, MIPS_V2SI_FTYPE_V2SI_UQI),
LOONGSON_BUILTIN_SUFFIX (psubw, u, MIPS_UV2SI_FTYPE_UV2SI_UV2SI),
LOONGSON_BUILTIN_SUFFIX (psubh, u, MIPS_UV4HI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN_SUFFIX (psubb, u, MIPS_UV8QI_FTYPE_UV8QI_UV8QI),
LOONGSON_BUILTIN_SUFFIX (psubw, s, MIPS_V2SI_FTYPE_V2SI_V2SI),
LOONGSON_BUILTIN_SUFFIX (psubh, s, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN_SUFFIX (psubb, s, MIPS_V8QI_FTYPE_V8QI_V8QI),
LOONGSON_BUILTIN_SUFFIX (psubd, u, MIPS_UDI_FTYPE_UDI_UDI),
LOONGSON_BUILTIN_SUFFIX (psubd, s, MIPS_DI_FTYPE_DI_DI),
LOONGSON_BUILTIN (psubsh, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN (psubsb, MIPS_V8QI_FTYPE_V8QI_V8QI),
LOONGSON_BUILTIN (psubush, MIPS_UV4HI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN (psubusb, MIPS_UV8QI_FTYPE_UV8QI_UV8QI),
LOONGSON_BUILTIN_SUFFIX (punpckhbh, u, MIPS_UV8QI_FTYPE_UV8QI_UV8QI),
LOONGSON_BUILTIN_SUFFIX (punpckhhw, u, MIPS_UV4HI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN_SUFFIX (punpckhwd, u, MIPS_UV2SI_FTYPE_UV2SI_UV2SI),
LOONGSON_BUILTIN_SUFFIX (punpckhbh, s, MIPS_V8QI_FTYPE_V8QI_V8QI),
LOONGSON_BUILTIN_SUFFIX (punpckhhw, s, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN_SUFFIX (punpckhwd, s, MIPS_V2SI_FTYPE_V2SI_V2SI),
LOONGSON_BUILTIN_SUFFIX (punpcklbh, u, MIPS_UV8QI_FTYPE_UV8QI_UV8QI),
LOONGSON_BUILTIN_SUFFIX (punpcklhw, u, MIPS_UV4HI_FTYPE_UV4HI_UV4HI),
LOONGSON_BUILTIN_SUFFIX (punpcklwd, u, MIPS_UV2SI_FTYPE_UV2SI_UV2SI),
LOONGSON_BUILTIN_SUFFIX (punpcklbh, s, MIPS_V8QI_FTYPE_V8QI_V8QI),
LOONGSON_BUILTIN_SUFFIX (punpcklhw, s, MIPS_V4HI_FTYPE_V4HI_V4HI),
LOONGSON_BUILTIN_SUFFIX (punpcklwd, s, MIPS_V2SI_FTYPE_V2SI_V2SI),
/* Sundry other built-in functions. */
DIRECT_NO_TARGET_BUILTIN (cache, MIPS_VOID_FTYPE_SI_CVPOINTER, cache),
/* Built-in functions for MSA. */
MSA_BUILTIN_PURE (sll_b, MIPS_V16QI_FTYPE_V16QI_V16QI),
MSA_BUILTIN_PURE (sll_h, MIPS_V8HI_FTYPE_V8HI_V8HI),
MSA_BUILTIN_PURE (sll_w, MIPS_V4SI_FTYPE_V4SI_V4SI),
MSA_BUILTIN_PURE (sll_d, MIPS_V2DI_FTYPE_V2DI_V2DI),
MSA_BUILTIN_PURE (slli_b, MIPS_V16QI_FTYPE_V16QI_UQI),
MSA_BUILTIN_PURE (slli_h, MIPS_V8HI_FTYPE_V8HI_UQI),
MSA_BUILTIN_PURE (slli_w, MIPS_V4SI_FTYPE_V4SI_UQI),
MSA_BUILTIN_PURE (slli_d, MIPS_V2DI_FTYPE_V2DI_UQI),
MSA_BUILTIN_PURE (sra_b, MIPS_V16QI_FTYPE_V16QI_V16QI),
MSA_BUILTIN_PURE (sra_h, MIPS_V8HI_FTYPE_V8HI_V8HI),
MSA_BUILTIN_PURE (sra_w, MIPS_V4SI_FTYPE_V4SI_V4SI),
MSA_BUILTIN_PURE (sra_d, MIPS_V2DI_FTYPE_V2DI_V2DI),
MSA_BUILTIN_PURE (srai_b, MIPS_V16QI_FTYPE_V16QI_UQI),
MSA_BUILTIN_PURE (srai_h, MIPS_V8HI_FTYPE_V8HI_UQI),
MSA_BUILTIN_PURE (srai_w, MIPS_V4SI_FTYPE_V4SI_UQI),
MSA_BUILTIN_PURE (srai_d, MIPS_V2DI_FTYPE_V2DI_UQI),
MSA_BUILTIN_PURE (srar_b, MIPS_V16QI_FTYPE_V16QI_V16QI),
MSA_BUILTIN_PURE (srar_h, MIPS_V8HI_FTYPE_V8HI_V8HI),
MSA_BUILTIN_PURE (srar_w, MIPS_V4SI_FTYPE_V4SI_V4SI),
MSA_BUILTIN_PURE (srar_d, MIPS_V2DI_FTYPE_V2DI_V2DI),
MSA_BUILTIN_PURE (srari_b, MIPS_V16QI_FTYPE_V16QI_UQI),
MSA_BUILTIN_PURE (srari_h, MIPS_V8HI_FTYPE_V8HI_UQI),
MSA_BUILTIN_PURE (srari_w, MIPS_V4SI_FTYPE_V4SI_UQI),
MSA_BUILTIN_PURE (srari_d, MIPS_V2DI_FTYPE_V2DI_UQI),
MSA_BUILTIN_PURE (srl_b, MIPS_V16QI_FTYPE_V16QI_V16QI),
MSA_BUILTIN_PURE (srl_h, MIPS_V8HI_FTYPE_V8HI_V8HI),
MSA_BUILTIN_PURE (srl_w, MIPS_V4SI_FTYPE_V4SI_V4SI),
MSA_BUILTIN_PURE (srl_d, MIPS_V2DI_FTYPE_V2DI_V2DI),
MSA_BUILTIN_PURE (srli_b, MIPS_V16QI_FTYPE_V16QI_UQI),
MSA_BUILTIN_PURE (srli_h, MIPS_V8HI_FTYPE_V8HI_UQI),
MSA_BUILTIN_PURE (srli_w, MIPS_V4SI_FTYPE_V4SI_UQI),
MSA_BUILTIN_PURE (srli_d, MIPS_V2DI_FTYPE_V2DI_UQI),
MSA_BUILTIN_PURE (srlr_b, MIPS_V16QI_FTYPE_V16QI_V16QI),
MSA_BUILTIN_PURE (srlr_h, MIPS_V8HI_FTYPE_V8HI_V8HI),
MSA_BUILTIN_PURE (srlr_w, MIPS_V4SI_FTYPE_V4SI_V4SI),
MSA_BUILTIN_PURE (srlr_d, MIPS_V2DI_FTYPE_V2DI_V2DI),
MSA_BUILTIN_PURE (srlri_b, MIPS_V16QI_FTYPE_V16QI_UQI),
MSA_BUILTIN_PURE (srlri_h, MIPS_V8HI_FTYPE_V8HI_UQI),
MSA_BUILTIN_PURE (srlri_w, MIPS_V4SI_FTYPE_V4SI_UQI),
MSA_BUILTIN_PURE (srlri_d, MIPS_V2DI_FTYPE_V2DI_UQI),
MSA_BUILTIN_PURE (bclr_b, MIPS_UV16QI_FTYPE_UV16QI_UV16QI),
MSA_BUILTIN_PURE (bclr_h, MIPS_UV8HI_FTYPE_UV8HI_UV8HI),
MSA_BUILTIN_PURE (bclr_w, MIPS_UV4SI_FTYPE_UV4SI_UV4SI),
MSA_BUILTIN_PURE (bclr_d, MIPS_UV2DI_FTYPE_UV2DI_UV2DI),
MSA_BUILTIN_PURE (bclri_b, MIPS_UV16QI_FTYPE_UV16QI_UQI),
MSA_BUILTIN_PURE (bclri_h, MIPS_UV8HI_FTYPE_UV8HI_UQI),
MSA_BUILTIN_PURE (bclri_w, MIPS_UV4SI_FTYPE_UV4SI_UQI),
MSA_BUILTIN_PURE (bclri_d, MIPS_UV2DI_FTYPE_UV2DI_UQI),
MSA_BUILTIN_PURE (bset_b, MIPS_UV16QI_FTYPE_UV16QI_UV16QI),
MSA_BUILTIN_PURE (bset_h, MIPS_UV8HI_FTYPE_UV8HI_UV8HI),
MSA_BUILTIN_PURE (bset_w, MIPS_UV4SI_FTYPE_UV4SI_UV4SI),
MSA_BUILTIN_PURE (bset_d, MIPS_UV2DI_FTYPE_UV2DI_UV2DI),
MSA_BUILTIN_PURE (bseti_b, MIPS_UV16QI_FTYPE_UV16QI_UQI),
MSA_BUILTIN_PURE (bseti_h, MIPS_UV8HI_FTYPE_UV8HI_UQI),
MSA_BUILTIN_PURE (bseti_w, MIPS_UV4SI_FTYPE_UV4SI_UQI),
MSA_BUILTIN_PURE (bseti_d, MIPS_UV2DI_FTYPE_UV2DI_UQI),
MSA_BUILTIN_PURE (bneg_b, MIPS_UV16QI_FTYPE_UV16QI_UV16QI),
MSA_BUILTIN_PURE (bneg_h, MIPS_UV8HI_FTYPE_UV8HI_UV8HI),
MSA_BUILTIN_PURE (bneg_w, MIPS_UV4SI_FTYPE_UV4SI_UV4SI),
MSA_BUILTIN_PURE (bneg_d, MIPS_UV2DI_FTYPE_UV2DI_UV2DI),
MSA_BUILTIN_PURE (bnegi_b, MIPS_UV16QI_FTYPE_UV16QI_UQI),