| /* Target Definitions for moxie. |
| Copyright (C) 2008-2021 Free Software Foundation, Inc. |
| Contributed by Anthony Green. |
| |
| 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/>. */ |
| |
| #ifndef GCC_MOXIE_H |
| #define GCC_MOXIE_H |
| |
| #undef STARTFILE_SPEC |
| #define STARTFILE_SPEC "%{!mno-crt0:crt0%O%s} crti.o%s crtbegin.o%s" |
| |
| /* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own |
| magical crtend.o file (see crtstuff.c) which provides part of the |
| support for getting C++ file-scope static object constructed before |
| entering `main', followed by the normal svr3/svr4 "finalizer" file, |
| which is either `gcrtn.o' or `crtn.o'. */ |
| |
| #undef ENDFILE_SPEC |
| #define ENDFILE_SPEC "crtend.o%s crtn.o%s" |
| |
| /* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default |
| standard C library (unless we are building a shared library) and |
| the simulator BSP code. */ |
| |
| #undef LIB_SPEC |
| #define LIB_SPEC "%{!shared:%{!symbolic:-lc}}" |
| |
| #undef LINK_SPEC |
| #define LINK_SPEC "%{h*} %{v:-V} %{!mel:-EB} %{mel:-EL}\ |
| %{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic}" |
| |
| #ifndef MULTILIB_DEFAULTS |
| #define MULTILIB_DEFAULTS { "meb" } |
| #endif |
| |
| /* Layout of Source Language Data Types */ |
| |
| #define INT_TYPE_SIZE 32 |
| #define SHORT_TYPE_SIZE 16 |
| #define LONG_TYPE_SIZE 32 |
| #define LONG_LONG_TYPE_SIZE 64 |
| |
| #define FLOAT_TYPE_SIZE 32 |
| #define DOUBLE_TYPE_SIZE 64 |
| #define LONG_DOUBLE_TYPE_SIZE 64 |
| |
| #define DEFAULT_SIGNED_CHAR 0 |
| |
| #undef SIZE_TYPE |
| #define SIZE_TYPE "unsigned int" |
| |
| #undef PTRDIFF_TYPE |
| #define PTRDIFF_TYPE "int" |
| |
| #undef WCHAR_TYPE |
| #define WCHAR_TYPE "unsigned int" |
| |
| #undef WCHAR_TYPE_SIZE |
| #define WCHAR_TYPE_SIZE BITS_PER_WORD |
| |
| /* Registers... |
| |
| $fp - frame pointer |
| $sp - stack pointer |
| $r0 - general purpose 32-bit register. |
| $r1 - general purpose 32-bit register. |
| $r2 - general purpose 32-bit register. |
| $r3 - general purpose 32-bit register. |
| $r4 - general purpose 32-bit register. |
| $r5 - general purpose 32-bit register. |
| $r6 - general purpose 32-bit register. |
| $r7 - general purpose 32-bit register. |
| $r8 - general purpose 32-bit register. |
| $r9 - general purpose 32-bit register. |
| $r10 - general purpose 32-bit register. |
| $r11 - general purpose 32-bit register. |
| $r12 - general purpose 32-bit register. |
| $r13 - reserved for execution environment. |
| |
| Special Registers... |
| |
| $pc - 32-bit program counter. |
| |
| */ |
| |
| #define REGISTER_NAMES { \ |
| "$fp", "$sp", "$r0", "$r1", \ |
| "$r2", "$r3", "$r4", "$r5", \ |
| "$r6", "$r7", "$r8", "$r9", \ |
| "$r10", "$r11", "$r12", "$r13", \ |
| "?fp", "?ap", "$pc", "?cc" } |
| |
| #define MOXIE_FP 0 |
| #define MOXIE_SP 1 |
| #define MOXIE_R0 2 |
| #define MOXIE_R1 3 |
| #define MOXIE_R2 4 |
| #define MOXIE_R3 5 |
| #define MOXIE_R4 6 |
| #define MOXIE_R5 7 |
| #define MOXIE_R6 8 |
| #define MOXIE_R7 9 |
| #define MOXIE_R8 10 |
| #define MOXIE_R9 11 |
| #define MOXIE_R10 12 |
| #define MOXIE_R11 13 |
| #define MOXIE_R12 14 |
| #define MOXIE_R13 15 |
| #define MOXIE_QFP 16 |
| #define MOXIE_QAP 17 |
| #define MOXIE_PC 18 |
| #define MOXIE_CC 19 |
| |
| #define FIRST_PSEUDO_REGISTER 20 |
| |
| enum reg_class |
| { |
| NO_REGS, |
| GENERAL_REGS, |
| SPECIAL_REGS, |
| CC_REGS, |
| ALL_REGS, |
| LIM_REG_CLASSES |
| }; |
| |
| |
| #define REG_CLASS_CONTENTS \ |
| { { 0x00000000 }, /* Empty */ \ |
| { 0x0003FFFF }, /* $fp, $sp, $r0 to $r13, ?fp */ \ |
| { 0x00040000 }, /* $pc */ \ |
| { 0x00080000 }, /* ?cc */ \ |
| { 0x000FFFFF } /* All registers */ \ |
| } |
| |
| #define N_REG_CLASSES LIM_REG_CLASSES |
| |
| #define REG_CLASS_NAMES {\ |
| "NO_REGS", \ |
| "GENERAL_REGS", \ |
| "SPECIAL_REGS", \ |
| "CC_REGS", \ |
| "ALL_REGS" } |
| |
| #define FIXED_REGISTERS { 1, 1, 0, 0, \ |
| 0, 0, 0, 0, \ |
| 0, 0, 0, 0, \ |
| 0, 0, 0, 1, \ |
| 1, 1, 1, 1 } |
| |
| #define CALL_USED_REGISTERS { 1, 1, 1, 1, \ |
| 1, 1, 1, 1, \ |
| 0, 0, 0, 0, \ |
| 0, 0, 1, 1, \ |
| 1, 1, 1, 1 } |
| |
| /* We can't copy to or from our CC register. */ |
| #define AVOID_CCMODE_COPIES 1 |
| |
| /* A C expression whose value is a register class containing hard |
| register REGNO. */ |
| #define REGNO_REG_CLASS(R) ((R < MOXIE_PC) ? GENERAL_REGS : \ |
| (R == MOXIE_CC ? CC_REGS : SPECIAL_REGS)) |
| |
| /* The Overall Framework of an Assembler File */ |
| |
| #undef ASM_SPEC |
| #define ASM_SPEC "%{!mel:-EB} %{mel:-EL}" |
| #define ASM_COMMENT_START "#" |
| #define ASM_APP_ON "" |
| #define ASM_APP_OFF "" |
| |
| #define FILE_ASM_OP "\t.file\n" |
| |
| /* Switch to the text or data segment. */ |
| #define TEXT_SECTION_ASM_OP "\t.text" |
| #define DATA_SECTION_ASM_OP "\t.data" |
| |
| /* Assembler Commands for Alignment */ |
| |
| #define ASM_OUTPUT_ALIGN(STREAM,POWER) \ |
| fprintf (STREAM, "\t.p2align\t%d\n", POWER); |
| |
| /* Output and Generation of Labels */ |
| |
| #define GLOBAL_ASM_OP "\t.global\t" |
| |
| /* Passing Arguments in Registers */ |
| |
| /* A C type for declaring a variable that is used as the first |
| argument of `FUNCTION_ARG' and other related values. */ |
| #define CUMULATIVE_ARGS unsigned int |
| |
| /* If defined, the maximum amount of space required for outgoing arguments |
| will be computed and placed into the variable |
| `current_function_outgoing_args_size'. No space will be pushed |
| onto the stack for each call; instead, the function prologue should |
| increase the stack frame size by this amount. */ |
| #define ACCUMULATE_OUTGOING_ARGS 1 |
| |
| /* A C statement (sans semicolon) for initializing the variable CUM |
| for the state at the beginning of the argument list. |
| For moxie, the first arg is passed in register 2 (aka $r0). */ |
| #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,FNDECL,N_NAMED_ARGS) \ |
| (CUM = MOXIE_R0) |
| |
| /* How Scalar Function Values Are Returned */ |
| |
| /* STACK AND CALLING */ |
| |
| /* Define this macro if pushing a word onto the stack moves the stack |
| pointer to a smaller address. */ |
| #define STACK_GROWS_DOWNWARD 1 |
| |
| /* Define this if the above stack space is to be considered part of the |
| space allocated by the caller. */ |
| #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 1 |
| #define STACK_PARMS_IN_REG_PARM_AREA |
| |
| /* Define this if it is the responsibility of the caller to allocate |
| the area reserved for arguments passed in registers. */ |
| #define REG_PARM_STACK_SPACE(FNDECL) (6 * UNITS_PER_WORD) |
| |
| /* Offset from the argument pointer register to the first argument's |
| address. On some machines it may depend on the data type of the |
| function. */ |
| #define FIRST_PARM_OFFSET(F) 12 |
| |
| /* Define this macro to nonzero value if the addresses of local variable slots |
| are at negative offsets from the frame pointer. */ |
| #define FRAME_GROWS_DOWNWARD 1 |
| |
| /* Define this macro as a C expression that is nonzero for registers that are |
| used by the epilogue or the return pattern. The stack and frame |
| pointer registers are already assumed to be used as needed. */ |
| #define EPILOGUE_USES(R) (R == MOXIE_R5) |
| |
| /* A C expression whose value is RTL representing the location of the |
| incoming return address at the beginning of any function, before |
| the prologue. */ |
| #define INCOMING_RETURN_ADDR_RTX \ |
| gen_frame_mem (Pmode, \ |
| plus_constant (Pmode, stack_pointer_rtx, UNITS_PER_WORD)) |
| |
| /* Describe how we implement __builtin_eh_return. */ |
| #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N+2) : INVALID_REGNUM) |
| |
| /* Store the return handler into the call frame. */ |
| #define EH_RETURN_HANDLER_RTX \ |
| gen_frame_mem (Pmode, \ |
| plus_constant (Pmode, frame_pointer_rtx, UNITS_PER_WORD)) |
| |
| /* Storage Layout */ |
| |
| #define BITS_BIG_ENDIAN 0 |
| #define BYTES_BIG_ENDIAN ( ! TARGET_LITTLE_ENDIAN ) |
| #define WORDS_BIG_ENDIAN ( ! TARGET_LITTLE_ENDIAN ) |
| |
| /* Alignment required for a function entry point, in bits. */ |
| #define FUNCTION_BOUNDARY 16 |
| |
| /* Define this macro as a C expression which is nonzero if accessing |
| less than a word of memory (i.e. a `char' or a `short') is no |
| faster than accessing a word of memory. */ |
| #define SLOW_BYTE_ACCESS 1 |
| |
| /* Number of storage units in a word; normally the size of a |
| general-purpose register, a power of two from 1 or 8. */ |
| #define UNITS_PER_WORD 4 |
| |
| /* Define this macro to the minimum alignment enforced by hardware |
| for the stack pointer on this machine. The definition is a C |
| expression for the desired alignment (measured in bits). */ |
| #define STACK_BOUNDARY 32 |
| |
| /* Normal alignment required for function parameters on the stack, in |
| bits. All stack parameters receive at least this much alignment |
| regardless of data type. */ |
| #define PARM_BOUNDARY 32 |
| |
| /* Alignment of field after `int : 0' in a structure. */ |
| #define EMPTY_FIELD_BOUNDARY 32 |
| |
| /* No data type wants to be aligned rounder than this. */ |
| #define BIGGEST_ALIGNMENT 32 |
| |
| /* The best alignment to use in cases where we have a choice. */ |
| #define FASTEST_ALIGNMENT 32 |
| |
| /* Every structures size must be a multiple of 8 bits. */ |
| #define STRUCTURE_SIZE_BOUNDARY 8 |
| |
| /* Look at the fundamental type that is used for a bit-field and use |
| that to impose alignment on the enclosing structure. |
| struct s {int a:8}; should have same alignment as "int", not "char". */ |
| #define PCC_BITFIELD_TYPE_MATTERS 1 |
| |
| /* Largest integer machine mode for structures. If undefined, the default |
| is GET_MODE_SIZE(DImode). */ |
| #define MAX_FIXED_MODE_SIZE 32 |
| |
| /* Make arrays of chars word-aligned for the same reasons. */ |
| #define DATA_ALIGNMENT(TYPE, ALIGN) \ |
| (TREE_CODE (TYPE) == ARRAY_TYPE \ |
| && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \ |
| && (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN)) |
| |
| /* Set this nonzero if move instructions will actually fail to work |
| when given unaligned data. */ |
| #define STRICT_ALIGNMENT 1 |
| |
| /* Generating Code for Profiling */ |
| #define FUNCTION_PROFILER(FILE,LABELNO) (abort (), 0) |
| |
| /* Trampolines for Nested Functions. */ |
| #define TRAMPOLINE_SIZE (2 + 6 + 4 + 2 + 6) |
| |
| /* Alignment required for trampolines, in bits. */ |
| #define TRAMPOLINE_ALIGNMENT 32 |
| |
| /* An alias for the machine mode for pointers. */ |
| #define Pmode SImode |
| |
| /* An alias for the machine mode used for memory references to |
| functions being called, in `call' RTL expressions. */ |
| #define FUNCTION_MODE QImode |
| |
| /* The register number of the stack pointer register, which must also |
| be a fixed register according to `FIXED_REGISTERS'. */ |
| #define STACK_POINTER_REGNUM MOXIE_SP |
| |
| /* The register number of the frame pointer register, which is used to |
| access automatic variables in the stack frame. */ |
| #define FRAME_POINTER_REGNUM MOXIE_QFP |
| |
| /* The register number of the arg pointer register, which is used to |
| access the function's argument list. */ |
| #define ARG_POINTER_REGNUM MOXIE_QAP |
| |
| #define HARD_FRAME_POINTER_REGNUM MOXIE_FP |
| |
| #define ELIMINABLE_REGS \ |
| {{ FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }, \ |
| { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM }} |
| |
| /* This macro returns the initial difference between the specified pair |
| of registers. */ |
| #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ |
| do { \ |
| (OFFSET) = moxie_initial_elimination_offset ((FROM), (TO)); \ |
| } while (0) |
| |
| /* A C expression that is nonzero if REGNO is the number of a hard |
| register in which function arguments are sometimes passed. */ |
| #define FUNCTION_ARG_REGNO_P(r) (r >= MOXIE_R0 && r <= MOXIE_R5) |
| |
| /* A macro whose definition is the name of the class to which a valid |
| base register must belong. A base register is one used in an |
| address which is the register value plus a displacement. */ |
| #define BASE_REG_CLASS GENERAL_REGS |
| |
| #define INDEX_REG_CLASS NO_REGS |
| |
| #define HARD_REGNO_OK_FOR_BASE_P(NUM) \ |
| ((unsigned) (NUM) < FIRST_PSEUDO_REGISTER \ |
| && (REGNO_REG_CLASS(NUM) == GENERAL_REGS \ |
| || (NUM) == HARD_FRAME_POINTER_REGNUM)) |
| |
| /* A C expression which is nonzero if register number NUM is suitable |
| for use as a base register in operand addresses. */ |
| #ifdef REG_OK_STRICT |
| #define REGNO_OK_FOR_BASE_P(NUM) \ |
| (HARD_REGNO_OK_FOR_BASE_P(NUM) \ |
| || HARD_REGNO_OK_FOR_BASE_P(reg_renumber[(NUM)])) |
| #else |
| #define REGNO_OK_FOR_BASE_P(NUM) \ |
| ((NUM) >= FIRST_PSEUDO_REGISTER || HARD_REGNO_OK_FOR_BASE_P(NUM)) |
| #endif |
| |
| /* A C expression which is nonzero if register number NUM is suitable |
| for use as an index register in operand addresses. */ |
| #define REGNO_OK_FOR_INDEX_P(NUM) MOXIE_FP |
| |
| /* The maximum number of bytes that a single instruction can move |
| quickly between memory and registers or between two memory |
| locations. */ |
| #define MOVE_MAX 4 |
| |
| /* All load operations zero extend. */ |
| #define LOAD_EXTEND_OP(MEM) ZERO_EXTEND |
| |
| /* A number, the maximum number of registers that can appear in a |
| valid memory address. */ |
| #define MAX_REGS_PER_ADDRESS 1 |
| |
| /* An alias for a machine mode name. This is the machine mode that |
| elements of a jump-table should have. */ |
| #define CASE_VECTOR_MODE SImode |
| |
| /* Run-time Target Specification */ |
| |
| #define TARGET_CPU_CPP_BUILTINS() \ |
| { \ |
| builtin_define_std ("moxie"); \ |
| builtin_define_std ("MOXIE"); \ |
| if (TARGET_LITTLE_ENDIAN) \ |
| builtin_define ("__MOXIE_LITTLE_ENDIAN__"); \ |
| else \ |
| builtin_define ("__MOXIE_BIG_ENDIAN__"); \ |
| } |
| |
| #define HAS_LONG_UNCOND_BRANCH true |
| |
| #endif /* GCC_MOXIE_H */ |
