| /* Target definitions for PowerPC running Darwin (Mac OS X). |
| Copyright (C) 1997, 2000, 2001 Free Software Foundation, Inc. |
| Contributed by Apple Computer Inc. |
| |
| This file is part of GNU CC. |
| |
| GNU CC 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 2, or (at your option) |
| any later version. |
| |
| GNU CC 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 GNU CC; see the file COPYING. If not, write to |
| the Free Software Foundation, 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #undef TARGET_VERSION |
| #define TARGET_VERSION fprintf (stderr, " (Darwin/PowerPC)"); |
| |
| /* The "Darwin ABI" is mostly like AIX, but with some key differences. */ |
| |
| #define DEFAULT_ABI ABI_DARWIN |
| |
| /* The object file format is Mach-O. */ |
| |
| #define TARGET_OBJECT_FORMAT OBJECT_MACHO |
| |
| /* We're not ever going to do TOCs. */ |
| |
| #define TARGET_TOC 0 |
| #define TARGET_NO_TOC 1 |
| |
| /* The Darwin ABI always includes AltiVec, can't be (validly) turned |
| off. */ |
| |
| #define SUBTARGET_OVERRIDE_OPTIONS \ |
| rs6000_altivec_abi = 1; |
| |
| #define CPP_PREDEFINES "-D__ppc__ -D__POWERPC__ -D__NATURAL_ALIGNMENT__ -D__MACH__ -D__BIG_ENDIAN__ -D__APPLE__" |
| |
| /* We want -fPIC by default, unless we're using -static to compile for |
| the kernel or some such. */ |
| |
| #define CC1_SPEC "%{!static:-fPIC}" |
| |
| /* Make both r2 and r3 available for allocation. */ |
| #define FIXED_R2 0 |
| #define FIXED_R13 0 |
| |
| /* Base register for access to local variables of the function. */ |
| |
| #undef FRAME_POINTER_REGNUM |
| #define FRAME_POINTER_REGNUM 30 |
| |
| #undef PIC_OFFSET_TABLE_REGNUM |
| #define PIC_OFFSET_TABLE_REGNUM 31 |
| |
| /* Pad the outgoing args area to 16 bytes instead of the usual 8. */ |
| |
| #undef STARTING_FRAME_OFFSET |
| #define STARTING_FRAME_OFFSET \ |
| (RS6000_ALIGN (current_function_outgoing_args_size, 16) \ |
| + RS6000_VARARGS_AREA \ |
| + RS6000_SAVE_AREA) |
| |
| #undef STACK_DYNAMIC_OFFSET |
| #define STACK_DYNAMIC_OFFSET(FUNDECL) \ |
| (RS6000_ALIGN (current_function_outgoing_args_size, 16) \ |
| + (STACK_POINTER_OFFSET)) |
| |
| /* Define cutoff for using external functions to save floating point. |
| Currently on Darwin, always use inline stores. */ |
| |
| #undef FP_SAVE_INLINE |
| #define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 64) |
| |
| /* Always use the "debug" register names, they're what the assembler |
| wants to see. */ |
| |
| #undef REGISTER_NAMES |
| #define REGISTER_NAMES DEBUG_REGISTER_NAMES |
| |
| /* This outputs NAME to FILE. */ |
| |
| #undef RS6000_OUTPUT_BASENAME |
| #define RS6000_OUTPUT_BASENAME(FILE, NAME) \ |
| assemble_name (FILE, NAME); |
| |
| /* Output before instructions. */ |
| /* This is how to output the definition of a user-level label named NAME, |
| such as the label on a static function or variable NAME. */ |
| |
| #define ASM_OUTPUT_LABEL(FILE,NAME) \ |
| do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0) |
| |
| /* This is how to output a command to make the user-level label named NAME |
| defined for reference from other files. */ |
| |
| #undef ASM_GLOBALIZE_LABEL |
| #define ASM_GLOBALIZE_LABEL(FILE,NAME) \ |
| do { fputs ("\t.globl ", FILE); \ |
| RS6000_OUTPUT_BASENAME (FILE, NAME); putc ('\n', FILE);} while (0) |
| |
| /* This is how to output an internal label prefix. rs6000.c uses this |
| when generating traceback tables. */ |
| /* Not really used for Darwin? */ |
| |
| #undef ASM_OUTPUT_INTERNAL_LABEL_PREFIX |
| #define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \ |
| fprintf (FILE, "%s", PREFIX) |
| |
| #undef TEXT_SECTION_ASM_OP |
| #define TEXT_SECTION_ASM_OP ".text" |
| |
| /* Output before writable data. */ |
| |
| #undef DATA_SECTION_ASM_OP |
| #define DATA_SECTION_ASM_OP ".data" |
| |
| /* This says how to output an assembler line to define a global common |
| symbol. */ |
| /* ? */ |
| #undef ASM_OUTPUT_ALIGNED_COMMON |
| #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ |
| do { fputs (".comm ", (FILE)); \ |
| RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \ |
| fprintf ((FILE), ",%d\n", (SIZE)); } while (0) |
| |
| #define ASM_OUTPUT_SKIP(FILE,SIZE) \ |
| fprintf (FILE, "\t.space %d\n", SIZE) |
| |
| /* Override the standard rs6000 definition. */ |
| |
| #undef ASM_COMMENT_START |
| #define ASM_COMMENT_START ";" |
| |
| /* FP save and restore routines. */ |
| #define SAVE_FP_PREFIX "._savef" |
| #define SAVE_FP_SUFFIX "" |
| #define RESTORE_FP_PREFIX "._restf" |
| #define RESTORE_FP_SUFFIX "" |
| |
| /* Generate insns to call the profiler. */ |
| |
| #define PROFILE_HOOK(LABEL) output_profile_hook (LABEL) |
| |
| /* Function name to call to do profiling. */ |
| |
| #define RS6000_MCOUNT "*mcount" |
| |
| /* Default processor: a G4. */ |
| |
| #undef PROCESSOR_DEFAULT |
| #define PROCESSOR_DEFAULT PROCESSOR_PPC7400 |
| |
| /* Default target flag settings. Despite the fact that STMW/LMW |
| serializes, it's still a big codesize win to use them. Use FSEL by |
| default as well. */ |
| |
| #undef TARGET_DEFAULT |
| #define TARGET_DEFAULT (MASK_POWERPC | MASK_MULTIPLE | MASK_NEW_MNEMONICS \ |
| | MASK_PPC_GFXOPT) |
| |
| /* Since Darwin doesn't do TOCs, stub this out. */ |
| |
| #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) 0 |
| |
| /* Unlike most other PowerPC targets, chars are signed, for |
| consistency with other Darwin architectures. */ |
| |
| #undef DEFAULT_SIGNED_CHAR |
| #define DEFAULT_SIGNED_CHAR (1) |
| |
| /* Given an rtx X being reloaded into a reg required to be |
| in class CLASS, return the class of reg to actually use. |
| In general this is just CLASS; but on some machines |
| in some cases it is preferable to use a more restrictive class. |
| |
| On the RS/6000, we have to return NO_REGS when we want to reload a |
| floating-point CONST_DOUBLE to force it to be copied to memory. |
| |
| Don't allow R0 when loading the address of, or otherwise furtling with, |
| a SYMBOL_REF. */ |
| |
| #undef PREFERRED_RELOAD_CLASS |
| #define PREFERRED_RELOAD_CLASS(X,CLASS) \ |
| (((GET_CODE (X) == CONST_DOUBLE \ |
| && GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT) \ |
| ? NO_REGS \ |
| : (GET_MODE_CLASS (GET_MODE (X)) == MODE_INT \ |
| && (CLASS) == NON_SPECIAL_REGS) \ |
| ? GENERAL_REGS \ |
| : (GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == HIGH) \ |
| ? BASE_REGS \ |
| : (CLASS))) |
| |
| /* Fix for emit_group_load (): force large constants to be pushed via regs. */ |
| #define ALWAYS_PUSH_CONSTS_USING_REGS_P 1 |
| |
| /* Darwin word-aligns FP doubles but doubleword-aligns 64-bit ints. */ |
| #define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \ |
| (TYPE_MODE (TREE_CODE (TREE_TYPE (FIELD)) == ARRAY_TYPE \ |
| ? get_inner_array_type (FIELD) \ |
| : TREE_TYPE (FIELD)) == DFmode \ |
| ? MIN ((COMPUTED), 32) : (COMPUTED)) |
| |
| /* Darwin increases natural record alignment to doubleword if the first |
| field is an FP double while the FP fields remain word aligned. */ |
| #define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \ |
| ((TREE_CODE (STRUCT) == RECORD_TYPE \ |
| || TREE_CODE (STRUCT) == UNION_TYPE \ |
| || TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \ |
| && TYPE_FIELDS (STRUCT) != 0 \ |
| && DECL_MODE (TYPE_FIELDS (STRUCT)) == DFmode \ |
| ? MAX (MAX ((COMPUTED), (SPECIFIED)), 64) \ |
| : MAX ((COMPUTED), (SPECIFIED))) |
| /* XXX: Darwin supports neither .quad, or .llong, but it also doesn't |
| support 64 bit powerpc either, so this just keeps things happy. */ |
| #define DOUBLE_INT_ASM_OP "\t.quad\t" |
| |
| /* Get HOST_WIDE_INT and CONST_INT to be 32 bits, for compile time |
| space/speed. */ |
| #undef MAX_LONG_TYPE_SIZE |
| #define MAX_LONG_TYPE_SIZE 32 |
