| /* Target Definitions for ft32. |
| Copyright (C) 2015-2021 Free Software Foundation, Inc. |
| Contributed by FTDI <support@ftdi.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/>. */ |
| |
| #ifndef GCC_FT32_H |
| #define GCC_FT32_H |
| |
| #undef STARTFILE_SPEC |
| #define STARTFILE_SPEC "crt0%O%s %{msim:crti.o%s} %{!msim:crti-hw.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}} \ |
| %{mcompress:--relax} \ |
| %{msim:-Tsim.ld}" |
| |
| #undef LINK_SPEC |
| #define LINK_SPEC "%{h*} %{v:-V} \ |
| %{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic}" |
| |
| /* 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 1 |
| |
| #undef SIZE_TYPE |
| #define SIZE_TYPE "unsigned int" |
| |
| #undef PTRDIFF_TYPE |
| #define PTRDIFF_TYPE "int" |
| |
| #undef WCHAR_TYPE |
| #define WCHAR_TYPE "long int" |
| |
| #undef WCHAR_TYPE_SIZE |
| #define WCHAR_TYPE_SIZE BITS_PER_WORD |
| |
| #define REGISTER_NAMES { \ |
| "$fp", "$sp", "$r0", "$r1", \ |
| "$r2", "$r3", "$r4", "$r5", \ |
| "$r6", "$r7", "$r8", "$r9", \ |
| "$r10", "$r11", "$r12", "$r13", \ |
| "$r14", "$r15", "$r16", "$r17", "$r18", "$r19", "$r20", "$r21", "$r22", "$r23", "$r24", "$r25", "$r26", "$r27", "$r28", "$cc", \ |
| "?fp", "?ap", "$pc", "?cc" } |
| |
| #define FT32_FP 0 |
| #define FT32_SP 1 |
| #define FT32_R0 2 |
| #define FT32_R1 3 |
| #define FT32_R2 4 |
| #define FT32_R3 5 |
| #define FT32_R4 6 |
| #define FT32_R5 7 |
| #define FT32_R6 8 |
| #define FT32_R7 9 |
| #define FT32_R8 10 |
| #define FT32_R9 11 |
| #define FT32_R10 12 |
| #define FT32_R11 13 |
| #define FT32_R12 14 |
| #define FT32_R13 15 |
| #define FT32_R14 16 |
| #define FT32_R15 17 |
| #define FT32_R16 18 |
| #define FT32_R17 19 |
| #define FT32_R18 20 |
| #define FT32_R19 21 |
| #define FT32_R20 22 |
| #define FT32_R21 23 |
| #define FT32_R22 24 |
| #define FT32_R23 25 |
| #define FT32_R24 26 |
| #define FT32_R25 27 |
| #define FT32_R26 28 |
| #define FT32_R27 29 |
| #define FT32_R28 30 |
| #define FT32_R29 31 |
| #define FT32_QAP (32 + 1) |
| #define FT32_PC (32 + 2) |
| #define FT32_CC (32 + 3) |
| #define FIRST_PSEUDO_REGISTER (32 + 4) |
| |
| enum reg_class |
| { |
| NO_REGS, |
| GENERAL_REGS, |
| SPECIAL_REGS, |
| CC_REGS, |
| ALL_REGS, |
| LIM_REG_CLASSES |
| }; |
| |
| #define REG_CLASS_CONTENTS \ |
| { { 0x00000000, 0x00000000 }, /* Empty */ \ |
| { 0xFFFFFFFF, 0x00000003 }, /* $fp, $sp, $r0 to $r13, ?fp */ \ |
| { 0x00000000, 0x00000004 }, /* $pc */ \ |
| { 0x00000000, 0x00000008 }, /* ?cc */ \ |
| { 0xFFFFFFFF, 0x0000000F } /* 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 /* fp sp r0 r1 */ { 1, 1, 0, 0, \ |
| /* r2 r3 r4 r5 */ 0, 0, 0, 0, \ |
| /* r6 r7 r8 r9 */ 0, 0, 0, 0, \ |
| /* r10 r11 r12 r13 */ 0, 0, 0, 0, \ |
| /* r14 r15 r16 r17 */ 0, 0, 0, 0, \ |
| /* r18 r19 r20 r21 */ 0, 0, 0, 0, \ |
| /* r22 r23 r24 r25 */ 0, 0, 0, 0, \ |
| /* r26 r27 r28 r29 */ 0, 0, 1, 1, \ |
| /* r30 r31 */ 1, 1, 1, 1 } |
| |
| #define CALL_USED_REGISTERS \ |
| /* fp sp r0 r1 */ { 1, 1, 1, 1, \ |
| /* r2 r3 r4 r5 */ 1, 1, 1, 1, \ |
| /* r6 r7 r8 r9 */ 1, 1, 1, 1, \ |
| /* r10 r11 r12 r13 */ 1, 1, 1, 0, \ |
| /* r14 r15 r16 r17 */ 0, 0, 0, 0, \ |
| /* r18 r19 r20 r21 */ 0, 0, 0, 0, \ |
| /* r22 r23 r24 r25 */ 0, 0, 0, 0, \ |
| /* r26 r27 r28 r29 */ 0, 0, 1, 1, \ |
| /* r30 r31 */ 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 < FT32_PC) ? GENERAL_REGS : \ |
| (R == FT32_CC ? CC_REGS : SPECIAL_REGS)) |
| |
| /* The Overall Framework of an Assembler File */ |
| |
| #undef ASM_SPEC |
| #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); |
| |
| /* A C compound statement to output to stdio stream STREAM the |
| assembler syntax for an instruction operand X. */ |
| #define PRINT_OPERAND(STREAM, X, CODE) ft32_print_operand (STREAM, X, CODE) |
| |
| #define PRINT_OPERAND_ADDRESS(STREAM ,X) ft32_print_operand_address (STREAM, X) |
| |
| /* Output and Generation of Labels */ |
| |
| #define GLOBAL_ASM_OP "\t.global\t" |
| |
| #define JUMP_TABLES_IN_TEXT_SECTION (TARGET_NOPM ? 0 : 1) |
| |
| /* This is how to output an element of a case-vector that is absolute. */ |
| |
| #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ |
| fprintf (FILE, "\t.long\t.L%d\n", VALUE) \ |
| |
| /* 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 ft32, the first arg is passed in register 2 (aka $r0). */ |
| #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,FNDECL,N_NAMED_ARGS) \ |
| (CUM = FT32_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 |
| |
| /* 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) 0 |
| |
| /* 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 |
| |
| /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, |
| the stack pointer does not matter. The value is tested only in |
| functions that have frame pointers. |
| No definition is equivalent to always zero. */ |
| |
| #define EXIT_IGNORE_STACK 0 |
| |
| /* 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 == FT32_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, 333 * UNITS_PER_WORD)) |
| |
| #define RETURN_ADDR_RTX(COUNT, FRAMEADDR) \ |
| ((COUNT) == 0 \ |
| ? gen_rtx_MEM (Pmode, gen_rtx_PLUS (Pmode, arg_pointer_rtx, GEN_INT (-4))) \ |
| : NULL_RTX) |
| |
| /* 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 0 |
| #define WORDS_BIG_ENDIAN 0 |
| |
| /* Alignment required for a function entry point, in bits. */ |
| #define FUNCTION_BOUNDARY 32 |
| |
| #define BRANCH_COST(speed_p, predictable_p) 2 |
| |
| /* 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 |
| |
| #define STORE_FLAG_VALUE 1 |
| |
| #define MOVE_RATIO(speed) ((speed) ? 6 : 2) |
| |
| /* 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 |
| |
| /* Align definitions of arrays, unions and structures so that |
| initializations and copies can be made more efficient. This is not |
| ABI-changing, so it only affects places where we can see the |
| definition. Increasing the alignment tends to introduce padding, |
| so don't do this when optimizing for size/conserving stack space. */ |
| #define FT32_EXPAND_ALIGNMENT(COND, EXP, ALIGN) \ |
| (((COND) && ((ALIGN) < BITS_PER_WORD) \ |
| && (TREE_CODE (EXP) == ARRAY_TYPE \ |
| || TREE_CODE (EXP) == UNION_TYPE \ |
| || TREE_CODE (EXP) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN)) |
| |
| /* 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)) |
| |
| /* Similarly, make sure that objects on the stack are sensibly aligned. */ |
| #define LOCAL_ALIGNMENT(EXP, ALIGN) \ |
| FT32_EXPAND_ALIGNMENT(/*!flag_conserve_stack*/ 1, EXP, ALIGN) |
| |
| /* 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 |
| |
| /* 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 + 6 + 2 + 2 + 6) |
| |
| /* Alignment required for trampolines, in bits. */ |
| #define TRAMPOLINE_ALIGNMENT 32 |
| |
| /* An alias for the machine mode for pointers. */ |
| #define Pmode SImode |
| |
| #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \ |
| do { \ |
| if (((MODE) == HImode) \ |
| || ((MODE) == QImode)) \ |
| (MODE) = SImode; \ |
| } while (0) |
| |
| /* An alias for the machine mode used for memory references to |
| functions being called, in `call' RTL expressions. */ |
| #define FUNCTION_MODE QImode |
| |
| #define STATIC_CHAIN_REGNUM FT32_R28 |
| |
| /* The register number of the stack pointer register, which must also |
| be a fixed register according to `FIXED_REGISTERS'. */ |
| #define STACK_POINTER_REGNUM FT32_SP |
| |
| /* The register number of the frame pointer register, which is used to |
| access automatic variables in the stack frame. */ |
| #define FRAME_POINTER_REGNUM FT32_FP |
| |
| /* The register number of the arg pointer register, which is used to |
| access the function's argument list. */ |
| #define ARG_POINTER_REGNUM FT32_QAP |
| |
| #define ELIMINABLE_REGS \ |
| {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ |
| {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \ |
| {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}} |
| |
| |
| /* This macro returns the initial difference between the specified pair |
| of registers. */ |
| #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ |
| do { \ |
| (OFFSET) = ft32_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 >= FT32_R0 && r <= FT32_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) FT32_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 |
| |
| /* Define this to be nonzero if shift instructions ignore all but the low-order |
| few bits. */ |
| #define SHIFT_COUNT_TRUNCATED 1 |
| |
| /* 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 ("__FT32__"); \ |
| } |
| |
| #define HAS_LONG_UNCOND_BRANCH true |
| |
| #define NO_FUNCTION_CSE 1 |
| |
| #define ADDR_SPACE_PM 1 |
| |
| #define REGISTER_TARGET_PRAGMAS() do { \ |
| c_register_addr_space ("__flash__", TARGET_NOPM ? 0 : ADDR_SPACE_PM); \ |
| } while (0) |
| |
| extern int ft32_is_mem_pm(rtx o); |
| |
| #define ASM_OUTPUT_SYMBOL_REF(stream, sym) \ |
| do { \ |
| assemble_name (stream, XSTR (sym, 0)); \ |
| int section_debug = in_section && \ |
| (SECTION_STYLE (in_section) == SECTION_NAMED) && \ |
| (in_section->named.common.flags & SECTION_DEBUG); \ |
| if (!section_debug && SYMBOL_REF_FLAGS (sym) & 0x1000) \ |
| asm_fprintf (stream, "-0x800000"); \ |
| } while (0) |
| |
| #endif /* GCC_FT32_H */ |
