| /* Target definitions for PowerPC running Darwin (Mac OS X). |
| Copyright (C) 1997-2018 Free Software Foundation, Inc. |
| Contributed by Apple Computer Inc. |
| |
| 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/>. */ |
| |
| #undef DARWIN_PPC |
| #define DARWIN_PPC 1 |
| |
| /* The "Darwin ABI" is mostly like AIX, but with some key differences. */ |
| |
| #define DEFAULT_ABI ABI_DARWIN |
| |
| #ifdef IN_LIBGCC2 |
| #undef TARGET_64BIT |
| #ifdef __powerpc64__ |
| #define TARGET_64BIT 1 |
| #else |
| #define TARGET_64BIT 0 |
| #endif |
| #endif |
| |
| /* The object file format is Mach-O. */ |
| |
| #define TARGET_OBJECT_FORMAT OBJECT_MACHO |
| |
| /* Size of the Obj-C jump buffer. */ |
| #define OBJC_JBLEN ((TARGET_64BIT) ? (26*2 + 18*2 + 129 + 1) : (26 + 18*2 + 129 + 1)) |
| |
| /* We're not ever going to do TOCs. */ |
| |
| #define TARGET_TOC 0 |
| #define TARGET_NO_TOC 1 |
| |
| /* Override the default rs6000 definition. */ |
| #undef PTRDIFF_TYPE |
| #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int") |
| |
| #define TARGET_OS_CPP_BUILTINS() \ |
| do \ |
| { \ |
| if (!TARGET_64BIT) builtin_define ("__ppc__"); \ |
| if (TARGET_64BIT) builtin_define ("__ppc64__"); \ |
| builtin_define ("__POWERPC__"); \ |
| builtin_define ("__NATURAL_ALIGNMENT__"); \ |
| darwin_cpp_builtins (pfile); \ |
| } \ |
| while (0) |
| |
| /* Generate branch islands stubs if this is true. */ |
| extern int darwin_emit_branch_islands; |
| |
| #define SUBTARGET_OVERRIDE_OPTIONS darwin_rs6000_override_options () |
| |
| #define C_COMMON_OVERRIDE_OPTIONS do { \ |
| /* On powerpc, __cxa_get_exception_ptr is available starting in the \ |
| 10.4.6 libstdc++.dylib. */ \ |
| if (strverscmp (darwin_macosx_version_min, "10.4.6") < 0 \ |
| && flag_use_cxa_get_exception_ptr == 2) \ |
| flag_use_cxa_get_exception_ptr = 0; \ |
| if (flag_mkernel) \ |
| flag_no_builtin = 1; \ |
| SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \ |
| } while (0) |
| |
| /* Darwin has 128-bit long double support in libc in 10.4 and later. |
| Default to 128-bit long doubles even on earlier platforms for ABI |
| consistency; arithmetic will work even if libc and libm support is |
| not available. */ |
| |
| #define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128 |
| |
| |
| /* We want -fPIC by default, unless we're using -static to compile for |
| the kernel or some such. The "-faltivec" option should have been |
| called "-maltivec" all along. */ |
| |
| #define CC1_SPEC "\ |
| %(cc1_cpu) \ |
| %{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }} \ |
| %{static: %{Zdynamic: %e conflicting code gen style switches are used}}\ |
| %{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}} \ |
| %{faltivec:-maltivec -include altivec.h} %{fno-altivec:-mno-altivec} \ |
| %<faltivec %<fno-altivec " \ |
| DARWIN_CC1_SPEC |
| |
| #define DARWIN_ARCH_SPEC "%{m64:ppc64;:ppc}" |
| |
| #define DARWIN_SUBARCH_SPEC " \ |
| %{m64: ppc64} \ |
| %{!m64: \ |
| %{mcpu=601:ppc601; \ |
| mcpu=603:ppc603; \ |
| mcpu=603e:ppc603; \ |
| mcpu=604:ppc604; \ |
| mcpu=604e:ppc604e; \ |
| mcpu=740:ppc750; \ |
| mcpu=750:ppc750; \ |
| mcpu=G3:ppc750; \ |
| mcpu=7400:ppc7400; \ |
| mcpu=G4:ppc7400; \ |
| mcpu=7450:ppc7450; \ |
| mcpu=970:ppc970; \ |
| mcpu=power4:ppc970; \ |
| mcpu=G5:ppc970; \ |
| :ppc}}" |
| |
| /* crt2.o is at least partially required for 10.3.x and earlier. */ |
| #define DARWIN_CRT2_SPEC \ |
| "%{!m64:%:version-compare(!> 10.4 mmacosx-version-min= crt2.o%s)}" |
| |
| #undef SUBTARGET_EXTRA_SPECS |
| #define SUBTARGET_EXTRA_SPECS \ |
| DARWIN_EXTRA_SPECS \ |
| { "darwin_arch", DARWIN_ARCH_SPEC }, \ |
| { "darwin_crt2", DARWIN_CRT2_SPEC }, \ |
| { "darwin_subarch", DARWIN_SUBARCH_SPEC }, |
| |
| /* Output a .machine directive. */ |
| #undef TARGET_ASM_FILE_START |
| #define TARGET_ASM_FILE_START rs6000_darwin_file_start |
| |
| /* Make both r2 and r13 available for allocation. */ |
| #define FIXED_R2 0 |
| #define FIXED_R13 0 |
| |
| /* Base register for access to local variables of the function. */ |
| |
| #undef HARD_FRAME_POINTER_REGNUM |
| #define HARD_FRAME_POINTER_REGNUM 30 |
| |
| #undef RS6000_PIC_OFFSET_TABLE_REGNUM |
| #define RS6000_PIC_OFFSET_TABLE_REGNUM 31 |
| |
| /* Pad the outgoing args area to 16 bytes instead of the usual 8. */ |
| |
| #undef RS6000_STARTING_FRAME_OFFSET |
| #define RS6000_STARTING_FRAME_OFFSET \ |
| (RS6000_ALIGN (crtl->outgoing_args_size, 16) \ |
| + RS6000_SAVE_AREA) |
| |
| #undef STACK_DYNAMIC_OFFSET |
| #define STACK_DYNAMIC_OFFSET(FUNDECL) \ |
| (RS6000_ALIGN (crtl->outgoing_args_size.to_constant (), 16) \ |
| + (STACK_POINTER_OFFSET)) |
| |
| /* Darwin uses a function call if everything needs to be saved/restored. */ |
| |
| #undef WORLD_SAVE_P |
| #define WORLD_SAVE_P(INFO) ((INFO)->world_save_p) |
| |
| /* We don't use these on Darwin, they are just place-holders. */ |
| #define SAVE_FP_PREFIX "" |
| #define SAVE_FP_SUFFIX "" |
| #define RESTORE_FP_PREFIX "" |
| #define RESTORE_FP_SUFFIX "" |
| |
| /* The assembler wants the alternate register names, but without |
| leading percent sign. */ |
| #undef REGISTER_NAMES |
| #define REGISTER_NAMES \ |
| { \ |
| "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", "r29", "r30", "r31", \ |
| "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \ |
| "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \ |
| "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \ |
| "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \ |
| "mq", "lr", "ctr", "ap", \ |
| "cr0", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7", \ |
| "xer", \ |
| "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", \ |
| "v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", \ |
| "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", \ |
| "v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31", \ |
| "vrsave", "vscr", \ |
| "sfp", \ |
| "tfhar", "tfiar", "texasr" \ |
| } |
| |
| /* This outputs NAME to FILE. */ |
| |
| #undef RS6000_OUTPUT_BASENAME |
| #define RS6000_OUTPUT_BASENAME(FILE, NAME) \ |
| assemble_name (FILE, NAME) |
| |
| /* Globalizing directive for a label. */ |
| #undef GLOBAL_ASM_OP |
| #define GLOBAL_ASM_OP "\t.globl " |
| #undef TARGET_ASM_GLOBALIZE_LABEL |
| |
| /* 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) |
| |
| /* Override the standard rs6000 definition. */ |
| |
| #undef ASM_COMMENT_START |
| #define ASM_COMMENT_START ";" |
| |
| /* This is how to output an assembler line that says to advance |
| the location counter to a multiple of 2**LOG bytes using the |
| "nop" instruction as padding. */ |
| |
| #define ASM_OUTPUT_ALIGN_WITH_NOP(FILE,LOG) \ |
| do \ |
| { \ |
| if ((LOG) < 3) \ |
| { \ |
| ASM_OUTPUT_ALIGN (FILE,LOG); \ |
| } \ |
| else /* nop == ori r0,r0,0 */ \ |
| fprintf (FILE, "\t.align32 %d,0x60000000\n", (LOG)); \ |
| } while (0) |
| |
| #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN |
| /* This is supported in cctools 465 and later. The macro test |
| above prevents using it in earlier build environments. */ |
| #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \ |
| if ((LOG) != 0) \ |
| { \ |
| if ((MAX_SKIP) == 0) \ |
| fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ |
| else \ |
| fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ |
| } |
| #endif |
| |
| /* 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: G4, and G5 for 64-bit. */ |
| |
| #undef PROCESSOR_DEFAULT |
| #define PROCESSOR_DEFAULT PROCESSOR_PPC7400 |
| #undef PROCESSOR_DEFAULT64 |
| #define PROCESSOR_DEFAULT64 PROCESSOR_POWER4 |
| |
| /* Default target flag settings. Despite the fact that STMW/LMW |
| serializes, it's still a big code size win to use them. Use FSEL by |
| default as well. */ |
| |
| #undef TARGET_DEFAULT |
| #define TARGET_DEFAULT (MASK_MULTIPLE | MASK_PPC_GFXOPT) |
| |
| /* Darwin always uses IBM long double, never IEEE long double. */ |
| #undef TARGET_IEEEQUAD |
| #define TARGET_IEEEQUAD 0 |
| |
| #undef TARGET_IEEEQUAD_DEFAULT |
| #define TARGET_IEEEQUAD_DEFAULT 0 |
| |
| /* Since Darwin doesn't do TOCs, stub this out. */ |
| |
| #define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) ((void)X, (void)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) \ |
| ((CONSTANT_P (X) \ |
| && reg_classes_intersect_p ((CLASS), FLOAT_REGS)) \ |
| ? NO_REGS \ |
| : ((GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == HIGH) \ |
| && reg_class_subset_p (BASE_REGS, (CLASS))) \ |
| ? BASE_REGS \ |
| : (GET_MODE_CLASS (GET_MODE (X)) == MODE_INT \ |
| && (CLASS) == NON_SPECIAL_REGS) \ |
| ? GENERAL_REGS \ |
| : (CLASS)) |
| |
| /* Compute field alignment. |
| This implements the 'power' alignment rule by pegging the alignment of |
| items (beyond the first aggregate field) to 32 bits. The pegging is |
| suppressed for vector and long double items (both 128 in size). |
| There is a dummy use of the FIELD argument to avoid an unused variable |
| warning (see PR59496). */ |
| #define ADJUST_FIELD_ALIGN(FIELD, TYPE, COMPUTED) \ |
| ((void) (FIELD), \ |
| (TARGET_ALIGN_NATURAL \ |
| ? (COMPUTED) \ |
| : (COMPUTED) == 128 \ |
| ? 128 \ |
| : MIN ((COMPUTED), 32))) |
| |
| /* 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) \ |
| && TARGET_ALIGN_NATURAL == 0 \ |
| ? darwin_rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \ |
| : (TREE_CODE (STRUCT) == VECTOR_TYPE \ |
| && ALTIVEC_VECTOR_MODE (TYPE_MODE (STRUCT))) \ |
| ? MAX (MAX ((COMPUTED), (SPECIFIED)), 128) \ |
| : MAX ((COMPUTED), (SPECIFIED))) |
| |
| /* Specify padding for the last element of a block move between |
| registers and memory. FIRST is nonzero if this is the only |
| element. */ |
| #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \ |
| (!(FIRST) ? PAD_UPWARD : targetm.calls.function_arg_padding (MODE, TYPE)) |
| |
| #define DOUBLE_INT_ASM_OP "\t.quad\t" |
| |
| /* For binary compatibility with 2.95; Darwin C APIs use bool from |
| stdbool.h, which was an int-sized enum in 2.95. Users can explicitly |
| choose to have sizeof(bool)==1 with the -mone-byte-bool switch. */ |
| #define BOOL_TYPE_SIZE (darwin_one_byte_bool ? CHAR_TYPE_SIZE : INT_TYPE_SIZE) |
| |
| #undef REGISTER_TARGET_PRAGMAS |
| #define REGISTER_TARGET_PRAGMAS() \ |
| do \ |
| { \ |
| DARWIN_REGISTER_TARGET_PRAGMAS(); \ |
| targetm.resolve_overloaded_builtin = altivec_resolve_overloaded_builtin; \ |
| } \ |
| while (0) |
| |
| #ifdef IN_LIBGCC2 |
| #include <stdbool.h> |
| #endif |
| |
| /* True, iff we're generating fast turn around debugging code. When |
| true, we arrange for function prologues to start with 5 nops so |
| that gdb may insert code to redirect them, and for data to be |
| accessed indirectly. The runtime uses this indirection to forward |
| references for data to the original instance of that data. */ |
| |
| #define TARGET_FIX_AND_CONTINUE (darwin_fix_and_continue) |
| |
| /* This is the reserved direct dispatch address for Objective-C. */ |
| #define OFFS_MSGSEND_FAST 0xFFFEFF00 |
| |
| /* This is the reserved ivar address Objective-C. */ |
| #define OFFS_ASSIGNIVAR_FAST 0xFFFEFEC0 |
| |
| /* Old versions of Mac OS/Darwin don't have C99 functions available. */ |
| #undef TARGET_LIBC_HAS_FUNCTION |
| #define TARGET_LIBC_HAS_FUNCTION darwin_libc_has_function |
| |
| /* When generating kernel code or kexts, we don't use Altivec by |
| default, as kernel code doesn't save/restore those registers. */ |
| #define OS_MISSING_ALTIVEC (flag_mkernel || flag_apple_kext) |
| |
| /* Darwin has support for section anchors on powerpc*. |
| It is disabled for any section containing a "zero-sized item" (because these |
| are re-written as size=1 to be compatible with the OSX ld64). |
| The re-writing would interfere with the computation of anchor offsets. |
| Therefore, we place zero-sized items in their own sections and make such |
| sections unavailable to section anchoring. */ |
| |
| #undef TARGET_ASM_OUTPUT_ANCHOR |
| #define TARGET_ASM_OUTPUT_ANCHOR darwin_asm_output_anchor |
| |
| #undef TARGET_USE_ANCHORS_FOR_SYMBOL_P |
| #define TARGET_USE_ANCHORS_FOR_SYMBOL_P darwin_use_anchors_for_symbol_p |
| |
| #undef DARWIN_SECTION_ANCHORS |
| #define DARWIN_SECTION_ANCHORS 1 |
| |
| /* PPC Darwin has to rename some of the long double builtins. */ |
| #undef SUBTARGET_INIT_BUILTINS |
| #define SUBTARGET_INIT_BUILTINS \ |
| do { \ |
| darwin_patch_builtins (); \ |
| rs6000_builtin_decls[(unsigned) (RS6000_BUILTIN_CFSTRING)] \ |
| = darwin_init_cfstring_builtins ((unsigned) (RS6000_BUILTIN_CFSTRING)); \ |
| } while(0) |
| |
| /* So far, there is no rs6000_fold_builtin, if one is introduced, then |
| this will need to be modified similar to the x86 case. */ |
| #define TARGET_FOLD_BUILTIN SUBTARGET_FOLD_BUILTIN |
| |
| /* Use standard DWARF numbering for DWARF debugging information. */ |
| #define RS6000_USE_DWARF_NUMBERING |
| |
