475 lines
17 KiB
C
475 lines
17 KiB
C
/* Target definitions for PowerPC running Darwin (Mac OS X).
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Copyright (C) 1997, 2000, 2001, 2003, 2004, 2005, 2006
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Free Software Foundation, Inc.
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Contributed by Apple Computer Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 2, or (at your
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option) any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the
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Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#undef TARGET_VERSION
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#define TARGET_VERSION fprintf (stderr, " (Darwin/PowerPC)");
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/* The "Darwin ABI" is mostly like AIX, but with some key differences. */
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#define DEFAULT_ABI ABI_DARWIN
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#ifdef IN_LIBGCC2
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#undef TARGET_64BIT
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#ifdef __powerpc64__
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#define TARGET_64BIT 1
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#else
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#define TARGET_64BIT 0
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#endif
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#endif
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/* The object file format is Mach-O. */
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#define TARGET_OBJECT_FORMAT OBJECT_MACHO
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/* Size of the Obj-C jump buffer. */
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#define OBJC_JBLEN ((TARGET_64BIT) ? (26*2 + 18*2 + 129 + 1) : (26 + 18*2 + 129 + 1))
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/* We're not ever going to do TOCs. */
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#define TARGET_TOC 0
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#define TARGET_NO_TOC 1
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/* Override the default rs6000 definition. */
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#undef PTRDIFF_TYPE
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#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
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/* Translate config/rs6000/darwin.opt to config/darwin.h. */
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#define TARGET_DYNAMIC_NO_PIC (TARGET_MACHO_DYNAMIC_NO_PIC)
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#define TARGET_OS_CPP_BUILTINS() \
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do \
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{ \
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if (!TARGET_64BIT) builtin_define ("__ppc__"); \
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if (TARGET_64BIT) builtin_define ("__ppc64__"); \
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builtin_define ("__POWERPC__"); \
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builtin_define ("__NATURAL_ALIGNMENT__"); \
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darwin_cpp_builtins (pfile); \
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} \
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while (0)
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#define SUBTARGET_OVERRIDE_OPTIONS \
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do { \
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/* The Darwin ABI always includes AltiVec, can't be (validly) turned \
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off. */ \
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rs6000_altivec_abi = 1; \
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TARGET_ALTIVEC_VRSAVE = 1; \
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if (DEFAULT_ABI == ABI_DARWIN) \
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{ \
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if (MACHO_DYNAMIC_NO_PIC_P) \
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{ \
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if (flag_pic) \
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warning (0, "-mdynamic-no-pic overrides -fpic or -fPIC"); \
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flag_pic = 0; \
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} \
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else if (flag_pic == 1) \
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{ \
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flag_pic = 2; \
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} \
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} \
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if (TARGET_64BIT && ! TARGET_POWERPC64) \
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{ \
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target_flags |= MASK_POWERPC64; \
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warning (0, "-m64 requires PowerPC64 architecture, enabling"); \
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} \
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if (flag_mkernel) \
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{ \
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rs6000_default_long_calls = 1; \
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target_flags |= MASK_SOFT_FLOAT; \
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} \
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\
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/* Make -m64 imply -maltivec. Darwin's 64-bit ABI includes \
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Altivec. */ \
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if (!flag_mkernel && !flag_apple_kext \
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&& TARGET_64BIT \
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&& ! (target_flags_explicit & MASK_ALTIVEC)) \
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target_flags |= MASK_ALTIVEC; \
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\
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/* Unless the user (not the configurer) has explicitly overridden \
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it with -mcpu=G3 or -mno-altivec, then 10.5+ targets default to \
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G4 unless targetting the kernel. */ \
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if (!flag_mkernel \
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&& !flag_apple_kext \
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&& darwin_macosx_version_min \
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&& strverscmp (darwin_macosx_version_min, "10.5") >= 0 \
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&& ! (target_flags_explicit & MASK_ALTIVEC) \
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&& ! rs6000_select[1].string) \
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{ \
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target_flags |= MASK_ALTIVEC; \
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} \
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} while(0)
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#define C_COMMON_OVERRIDE_OPTIONS do { \
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/* On powerpc, __cxa_get_exception_ptr is available starting in the \
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10.4.6 libstdc++.dylib. */ \
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if ((! darwin_macosx_version_min \
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|| strverscmp (darwin_macosx_version_min, "10.4.6") < 0) \
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&& flag_use_cxa_get_exception_ptr == 2) \
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flag_use_cxa_get_exception_ptr = 0; \
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if (flag_mkernel) \
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flag_no_builtin = 1; \
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SUBTARGET_C_COMMON_OVERRIDE_OPTIONS; \
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} while (0)
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/* Darwin has 128-bit long double support in libc in 10.4 and later.
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Default to 128-bit long doubles even on earlier platforms for ABI
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consistency; arithmetic will work even if libc and libm support is
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not available. */
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#define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128
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/* We want -fPIC by default, unless we're using -static to compile for
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the kernel or some such. */
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#define CC1_SPEC "\
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%{g: %{!fno-eliminate-unused-debug-symbols: -feliminate-unused-debug-symbols }} \
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%{static: %{Zdynamic: %e conflicting code gen style switches are used}}\
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%{!mkernel:%{!static:%{!mdynamic-no-pic:-fPIC}}}"
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#define DARWIN_ARCH_SPEC "%{m64:ppc64;:ppc}"
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#define DARWIN_SUBARCH_SPEC " \
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%{m64: ppc64} \
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%{!m64: \
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%{mcpu=601:ppc601; \
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mcpu=603:ppc603; \
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mcpu=603e:ppc603; \
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mcpu=604:ppc604; \
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mcpu=604e:ppc604e; \
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mcpu=740:ppc750; \
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mcpu=750:ppc750; \
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mcpu=G3:ppc750; \
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mcpu=7400:ppc7400; \
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mcpu=G4:ppc7400; \
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mcpu=7450:ppc7450; \
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mcpu=970:ppc970; \
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mcpu=power4:ppc970; \
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mcpu=G5:ppc970; \
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:ppc}}"
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/* crt2.o is at least partially required for 10.3.x and earlier. */
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#define DARWIN_CRT2_SPEC \
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"%{!m64:%:version-compare(!> 10.4 mmacosx-version-min= crt2.o%s)}"
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#undef SUBTARGET_EXTRA_SPECS
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#define SUBTARGET_EXTRA_SPECS \
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{ "darwin_arch", DARWIN_ARCH_SPEC }, \
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{ "darwin_crt2", DARWIN_CRT2_SPEC }, \
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{ "darwin_subarch", DARWIN_SUBARCH_SPEC },
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/* Output a .machine directive. */
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#undef TARGET_ASM_FILE_START
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#define TARGET_ASM_FILE_START rs6000_darwin_file_start
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/* The "-faltivec" option should have been called "-maltivec" all
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along. -ffix-and-continue and -findirect-data is for compatibility
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for old compilers. */
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#define SUBTARGET_OPTION_TRANSLATE_TABLE \
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{ "-ffix-and-continue", "-mfix-and-continue" }, \
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{ "-findirect-data", "-mfix-and-continue" }, \
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{ "-faltivec", "-maltivec -include altivec.h" }, \
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{ "-fno-altivec", "-mno-altivec" }, \
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{ "-Waltivec-long-deprecated", "-mwarn-altivec-long" }, \
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{ "-Wno-altivec-long-deprecated", "-mno-warn-altivec-long" }
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/* Make both r2 and r13 available for allocation. */
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#define FIXED_R2 0
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#define FIXED_R13 0
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/* Base register for access to local variables of the function. */
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#undef HARD_FRAME_POINTER_REGNUM
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#define HARD_FRAME_POINTER_REGNUM 30
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#undef RS6000_PIC_OFFSET_TABLE_REGNUM
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#define RS6000_PIC_OFFSET_TABLE_REGNUM 31
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/* Pad the outgoing args area to 16 bytes instead of the usual 8. */
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#undef STARTING_FRAME_OFFSET
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#define STARTING_FRAME_OFFSET \
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(FRAME_GROWS_DOWNWARD \
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? 0 \
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: (RS6000_ALIGN (current_function_outgoing_args_size, 16) \
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+ RS6000_SAVE_AREA))
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#undef STACK_DYNAMIC_OFFSET
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#define STACK_DYNAMIC_OFFSET(FUNDECL) \
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(RS6000_ALIGN (current_function_outgoing_args_size, 16) \
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+ (STACK_POINTER_OFFSET))
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/* These are used by -fbranch-probabilities */
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#define HOT_TEXT_SECTION_NAME "__TEXT,__text,regular,pure_instructions"
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#define UNLIKELY_EXECUTED_TEXT_SECTION_NAME \
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"__TEXT,__unlikely,regular,pure_instructions"
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/* Define cutoff for using external functions to save floating point.
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Currently on Darwin, always use inline stores. */
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#undef FP_SAVE_INLINE
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#define FP_SAVE_INLINE(FIRST_REG) ((FIRST_REG) < 64)
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/* Darwin uses a function call if everything needs to be saved/restored. */
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#undef WORLD_SAVE_P
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#define WORLD_SAVE_P(INFO) ((INFO)->world_save_p)
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/* The assembler wants the alternate register names, but without
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leading percent sign. */
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#undef REGISTER_NAMES
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#define REGISTER_NAMES \
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{ \
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"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
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"r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \
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"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
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"r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31", \
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"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
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"f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
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"f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \
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"f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \
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"mq", "lr", "ctr", "ap", \
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"cr0", "cr1", "cr2", "cr3", "cr4", "cr5", "cr6", "cr7", \
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"xer", \
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"v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", \
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"v8", "v9", "v10", "v11", "v12", "v13", "v14", "v15", \
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"v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23", \
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"v24", "v25", "v26", "v27", "v28", "v29", "v30", "v31", \
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"vrsave", "vscr", \
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"spe_acc", "spefscr", \
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"sfp" \
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}
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/* This outputs NAME to FILE. */
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#undef RS6000_OUTPUT_BASENAME
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#define RS6000_OUTPUT_BASENAME(FILE, NAME) \
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assemble_name (FILE, NAME)
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/* Globalizing directive for a label. */
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#undef GLOBAL_ASM_OP
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#define GLOBAL_ASM_OP "\t.globl "
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#undef TARGET_ASM_GLOBALIZE_LABEL
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/* This is how to output an internal label prefix. rs6000.c uses this
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when generating traceback tables. */
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/* Not really used for Darwin? */
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#undef ASM_OUTPUT_INTERNAL_LABEL_PREFIX
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#define ASM_OUTPUT_INTERNAL_LABEL_PREFIX(FILE,PREFIX) \
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fprintf (FILE, "%s", PREFIX)
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/* This says how to output an assembler line to define a global common
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symbol. */
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#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
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do { \
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unsigned HOST_WIDE_INT _new_size = SIZE; \
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fputs (".comm ", (FILE)); \
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RS6000_OUTPUT_BASENAME ((FILE), (NAME)); \
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if (_new_size == 0) _new_size = 1; \
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fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", _new_size); \
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} while (0)
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/* Override the standard rs6000 definition. */
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#undef ASM_COMMENT_START
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#define ASM_COMMENT_START ";"
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/* FP save and restore routines. */
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#define SAVE_FP_PREFIX "._savef"
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#define SAVE_FP_SUFFIX ""
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#define RESTORE_FP_PREFIX "._restf"
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#define RESTORE_FP_SUFFIX ""
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/* This is how to output an assembler line that says to advance
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the location counter to a multiple of 2**LOG bytes using the
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"nop" instruction as padding. */
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#define ASM_OUTPUT_ALIGN_WITH_NOP(FILE,LOG) \
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do \
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{ \
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if ((LOG) < 3) \
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{ \
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ASM_OUTPUT_ALIGN (FILE,LOG); \
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} \
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else /* nop == ori r0,r0,0 */ \
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fprintf (FILE, "\t.align32 %d,0x60000000\n", (LOG)); \
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} while (0)
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#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
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/* This is supported in cctools 465 and later. The macro test
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above prevents using it in earlier build environments. */
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#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
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if ((LOG) != 0) \
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{ \
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if ((MAX_SKIP) == 0) \
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fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
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else \
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fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
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}
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#endif
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/* Generate insns to call the profiler. */
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#define PROFILE_HOOK(LABEL) output_profile_hook (LABEL)
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/* Function name to call to do profiling. */
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#define RS6000_MCOUNT "*mcount"
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/* Default processor: G4, and G5 for 64-bit. */
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#undef PROCESSOR_DEFAULT
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#define PROCESSOR_DEFAULT PROCESSOR_PPC7400
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#undef PROCESSOR_DEFAULT64
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#define PROCESSOR_DEFAULT64 PROCESSOR_POWER4
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/* Default target flag settings. Despite the fact that STMW/LMW
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serializes, it's still a big code size win to use them. Use FSEL by
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default as well. */
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#undef TARGET_DEFAULT
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#define TARGET_DEFAULT (MASK_POWERPC | MASK_MULTIPLE | MASK_NEW_MNEMONICS \
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| MASK_PPC_GFXOPT)
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/* Darwin only runs on PowerPC, so short-circuit POWER patterns. */
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#undef TARGET_POWER
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#define TARGET_POWER 0
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#undef TARGET_IEEEQUAD
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#define TARGET_IEEEQUAD 0
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/* Since Darwin doesn't do TOCs, stub this out. */
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#define ASM_OUTPUT_SPECIAL_POOL_ENTRY_P(X, MODE) ((void)X, (void)MODE, 0)
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/* Unlike most other PowerPC targets, chars are signed, for
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consistency with other Darwin architectures. */
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#undef DEFAULT_SIGNED_CHAR
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#define DEFAULT_SIGNED_CHAR (1)
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/* Given an rtx X being reloaded into a reg required to be
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in class CLASS, return the class of reg to actually use.
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In general this is just CLASS; but on some machines
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in some cases it is preferable to use a more restrictive class.
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On the RS/6000, we have to return NO_REGS when we want to reload a
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floating-point CONST_DOUBLE to force it to be copied to memory.
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Don't allow R0 when loading the address of, or otherwise furtling with,
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a SYMBOL_REF. */
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#undef PREFERRED_RELOAD_CLASS
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#define PREFERRED_RELOAD_CLASS(X,CLASS) \
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((CONSTANT_P (X) \
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&& reg_classes_intersect_p ((CLASS), FLOAT_REGS)) \
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? NO_REGS \
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: ((GET_CODE (X) == SYMBOL_REF || GET_CODE (X) == HIGH) \
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&& reg_class_subset_p (BASE_REGS, (CLASS))) \
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? BASE_REGS \
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: (GET_MODE_CLASS (GET_MODE (X)) == MODE_INT \
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&& (CLASS) == NON_SPECIAL_REGS) \
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? GENERAL_REGS \
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: (CLASS))
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/* Fix for emit_group_load (): force large constants to be pushed via regs. */
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#define ALWAYS_PUSH_CONSTS_USING_REGS_P 1
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/* This now supports a natural alignment mode */
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/* Darwin word-aligns FP doubles but doubleword-aligns 64-bit ints. */
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#define ADJUST_FIELD_ALIGN(FIELD, COMPUTED) \
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(TARGET_ALIGN_NATURAL ? (COMPUTED) : \
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(TYPE_MODE (TREE_CODE (TREE_TYPE (FIELD)) == ARRAY_TYPE \
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? get_inner_array_type (FIELD) \
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: TREE_TYPE (FIELD)) == DFmode \
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? MIN ((COMPUTED), 32) : (COMPUTED)))
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/* Darwin increases natural record alignment to doubleword if the first
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field is an FP double while the FP fields remain word aligned. */
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#define ROUND_TYPE_ALIGN(STRUCT, COMPUTED, SPECIFIED) \
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((TREE_CODE (STRUCT) == RECORD_TYPE \
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|| TREE_CODE (STRUCT) == UNION_TYPE \
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|| TREE_CODE (STRUCT) == QUAL_UNION_TYPE) \
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&& TARGET_ALIGN_NATURAL == 0 \
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? rs6000_special_round_type_align (STRUCT, COMPUTED, SPECIFIED) \
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: (TREE_CODE (STRUCT) == VECTOR_TYPE \
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&& ALTIVEC_VECTOR_MODE (TYPE_MODE (STRUCT))) \
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? MAX (MAX ((COMPUTED), (SPECIFIED)), 128) \
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: MAX ((COMPUTED), (SPECIFIED)))
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/* Specify padding for the last element of a block move between
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registers and memory. FIRST is nonzero if this is the only
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element. */
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#define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
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(!(FIRST) ? upward : FUNCTION_ARG_PADDING (MODE, TYPE))
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/* XXX: Darwin supports neither .quad, or .llong, but it also doesn't
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support 64 bit PowerPC either, so this just keeps things happy. */
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#define DOUBLE_INT_ASM_OP "\t.quad\t"
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/* For binary compatibility with 2.95; Darwin C APIs use bool from
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stdbool.h, which was an int-sized enum in 2.95. Users can explicitly
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choose to have sizeof(bool)==1 with the -mone-byte-bool switch. */
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#define BOOL_TYPE_SIZE (darwin_one_byte_bool ? CHAR_TYPE_SIZE : INT_TYPE_SIZE)
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#undef REGISTER_TARGET_PRAGMAS
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#define REGISTER_TARGET_PRAGMAS() \
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do \
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{ \
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DARWIN_REGISTER_TARGET_PRAGMAS(); \
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targetm.resolve_overloaded_builtin = altivec_resolve_overloaded_builtin; \
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} \
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while (0)
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#ifdef IN_LIBGCC2
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#include <stdbool.h>
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#endif
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#define MD_UNWIND_SUPPORT "config/rs6000/darwin-unwind.h"
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#define HAS_MD_FALLBACK_FRAME_STATE_FOR 1
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/* True, iff we're generating fast turn around debugging code. When
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true, we arrange for function prologues to start with 5 nops so
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that gdb may insert code to redirect them, and for data to be
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accessed indirectly. The runtime uses this indirection to forward
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references for data to the original instance of that data. */
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#define TARGET_FIX_AND_CONTINUE (darwin_fix_and_continue)
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/* This is the reserved direct dispatch address for Objective-C. */
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#define OFFS_MSGSEND_FAST 0xFFFEFF00
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/* This is the reserved ivar address Objective-C. */
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#define OFFS_ASSIGNIVAR_FAST 0xFFFEFEC0
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/* Old versions of Mac OS/Darwin don't have C99 functions available. */
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#undef TARGET_C99_FUNCTIONS
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#define TARGET_C99_FUNCTIONS \
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(TARGET_64BIT \
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|| (darwin_macosx_version_min \
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&& strverscmp (darwin_macosx_version_min, "10.3") >= 0))
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/* When generating kernel code or kexts, we don't use Altivec by
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default, as kernel code doesn't save/restore those registers. */
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#define OS_MISSING_ALTIVEC (flag_mkernel || flag_apple_kext)
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