diff options
Diffstat (limited to 'gcc-4.9/gcc/config/rs6000/darwin.h')
| -rw-r--r-- | gcc-4.9/gcc/config/rs6000/darwin.h | 426 |
1 files changed, 426 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/config/rs6000/darwin.h b/gcc-4.9/gcc/config/rs6000/darwin.h new file mode 100644 index 000000000..0329f3f62 --- /dev/null +++ b/gcc-4.9/gcc/config/rs6000/darwin.h @@ -0,0 +1,426 @@ +/* Target definitions for PowerPC running Darwin (Mac OS X). + Copyright (C) 1997-2014 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}}\ + %{!mmacosx-version-min=*:-mmacosx-version-min=%(darwin_minversion)} \ + %{!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)}" + +/* Determine a minimum version based on compiler options. */ +#define DARWIN_MINVERSION_SPEC \ + "%{m64:%{fgnu-runtime:10.4; \ + ,objective-c|,objc-cpp-output:10.5; \ + ,objective-c-header:10.5; \ + ,objective-c++|,objective-c++-cpp-output:10.5; \ + ,objective-c++-header|,objc++-cpp-output:10.5; \ + :10.4}; \ + shared-libgcc:10.3; \ + :10.1}" + +#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 STARTING_FRAME_OFFSET +#define STARTING_FRAME_OFFSET \ + (FRAME_GROWS_DOWNWARD \ + ? 0 \ + : (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, 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", \ + "spe_acc", "spefscr", \ + "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 + +/* 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, 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) ? upward : 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 |