darwin.h   [plain text]

/* Target definitions for x86 running Darwin.
   Copyright (C) 2001, 2002, 2004 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 2, 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 COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Enable Mach-O bits in generic x86 code.  */
#undef TARGET_MACHO
#define TARGET_MACHO 1

/* APPLE LOCAL begin default to ppro */
/* Default to -mcpu=pentiumpro instead of i386 (radar 2730299)  ilr */
#undef TARGET_CPU_DEFAULT
#define TARGET_CPU_DEFAULT 4
/* APPLE LOCAL end default to ppro */

#define TARGET_VERSION fprintf (stderr, " (i386 Darwin)");

#define TARGET_OS_CPP_BUILTINS()                \
  do                                            \
    {                                           \
      builtin_define ("__i386__");              \
      builtin_define ("__LITTLE_ENDIAN__");     \
      /* APPLE LOCAL constant cfstrings */	\
      SUBTARGET_OS_CPP_BUILTINS ();		\
    }                                           \
  while (0)

/* We want -fPIC by default, unless we're using -static to compile for
   the kernel or some such.  */

#undef CC1_SPEC
/* APPLE LOCAL dynamic-no-pic */
/* APPLE LOCAL ignore -mcpu=G4 -mcpu=G5 */
/* When -mdynamic-no-pic finally works, remove the "xx" below.  FIXME!!  */
/* APPLE LOCAL gfull gused */
#define CC1_SPEC "\
%{gused: -g -feliminate-unused-debug-symbols %<gused }\
%{gfull: -g -fno-eliminate-unused-debug-symbols %<gfull }\
%{g: %{!gfull: -feliminate-unused-debug-symbols %<gfull }}\
%{!static:%{!mxxdynamic-no-pic:-fPIC}} %<faltivec %<mlong-branch %<mlongcall %<mcpu=G4 %<mcpu=G5"


/* APPLE LOCAL AltiVec */
#define CPP_ALTIVEC_SPEC "%<faltivec"

/* APPLE LOCAL begin 3492132 */

#define ASM_SPEC "%(darwin_arch_asm_spec)\
  -force_cpusubtype_ALL \
  %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
  %{!Zforce_cpusubtype_ALL:%{mmmx:-force_cpusubtype_ALL}\
			   %{msse:-force_cpusubtype_ALL}\
			   %{msse2:-force_cpusubtype_ALL}}"

#define DARWIN_ARCH_LD_SPEC                                                    \
"%{march=i386: %{!Zdynamiclib:-arch i386} %{Zdynamiclib:-arch_only i386}}      \
 %{march=i486: %{!Zdynamiclib:-arch i486} %{Zdynamiclib:-arch_only i486}}      \
 %{march=i586: %{!Zdynamiclib:-arch i586} %{Zdynamiclib:-arch_only i586}}      \
 %{march=pentium: %{!Zdynamiclib:-arch pentium} %{Zdynamiclib:-arch_only pentium}}    \
 %{march=pentiumpro: %{!Zdynamiclib:-arch pentpro} %{Zdynamiclib:-arch_only pentpro}} \
 %{march=i686: %{!Zdynamiclib:-arch i686} %{Zdynamiclib:-arch_only i686}}             \
 %{march=pentium3: %{!Zdynamiclib:-arch pentIIm3} %{Zdynamiclib:-arch_only pentIIm3}} \
 %{!mcpu*:%{!march*:%{!Zdynamiclib:-arch i686} %{Zdynamiclib:-arch_only i686}}} "

#define DARWIN_ARCH_ASM_SPEC        \
"%{march=i386: -arch i386}          \
 %{march=i486: -arch i486}          \
 %{march=i586: -arch i586}          \
 %{march=pentium: -arch pentium}    \
 %{march=pentiumpro: -arch pentpro} \
 %{march=i686: -arch i686}          \
 %{march=pentium3: -arch pentIIm3}  \
 %{!mcpu*:%{!march*: -arch i686}} "

#undef SUBTARGET_EXTRA_SPECS
#define SUBTARGET_EXTRA_SPECS			      \
  { "darwin_arch_asm_spec", DARWIN_ARCH_ASM_SPEC },   \
  { "darwin_arch_ld_spec", DARWIN_ARCH_LD_SPEC },     \
  { "darwin_arch", "i686" },

/* APPLE LOCAL end 3492132 */

/* Use the following macro for any Darwin/x86-specific command-line option
   translation.  */
#define SUBTARGET_OPTION_TRANSLATE_TABLE \
  { "", "" }

/* The Darwin assembler mostly follows AT&T syntax.  */
#undef ASSEMBLER_DIALECT
#define ASSEMBLER_DIALECT ASM_ATT

/* Define macro used to output shift-double opcodes when the shift
   count is in %cl.  Some assemblers require %cl as an argument;
   some don't.  This macro controls what to do: by default, don't
   print %cl.  */

#define SHIFT_DOUBLE_OMITS_COUNT 0

/* Define the syntax of pseudo-ops, labels and comments.  */

/* String containing the assembler's comment-starter.  */

#define ASM_COMMENT_START "#"

/* By default, target has a 80387, uses IEEE compatible arithmetic,
   and returns float values in the 387.  */

/* APPLE LOCAL long double default size --mrs */
#define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_128BIT_LONG_DOUBLE)

/* TARGET_DEEP_BRANCH_PREDICTION is incompatible with Mach-O PIC.  */

#undef TARGET_DEEP_BRANCH_PREDICTION
#define TARGET_DEEP_BRANCH_PREDICTION   0

/* For now, disable dynamic-no-pic.  We'll need to go through i386.c
   with a fine-tooth comb looking for refs to flag_pic!  */
#define MASK_MACHO_DYNAMIC_NO_PIC 0
#define TARGET_DYNAMIC_NO_PIC	  (target_flags & MASK_MACHO_DYNAMIC_NO_PIC)

/* Define the syntax of pseudo-ops, labels and comments.  */

#define LPREFIX "L"

/* Assembler pseudos to introduce constants of various size.  */

#define ASM_BYTE_OP "\t.byte\t"
#define ASM_SHORT "\t.word\t"
#define ASM_LONG "\t.long\t"
/* Darwin as doesn't do ".quad".  */

#undef ASM_OUTPUT_ALIGN
#define ASM_OUTPUT_ALIGN(FILE,LOG)	\
 do { if ((LOG) != 0)			\
        {				\
          if (in_text_section ())	\
            fprintf (FILE, "\t%s %d,0x90\n", ALIGN_ASM_OP, (LOG)); \
          else				\
            fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG)); \
        }				\
    } while (0)

/* This says how to output an assembler line
   to define a global common symbol.  */

#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
( fputs (".comm ", (FILE)),			\
  assemble_name ((FILE), (NAME)),		\
  fprintf ((FILE), ",%lu\n", (unsigned long)(ROUNDED)))

/* This says how to output an assembler line
   to define a local common symbol.  */

#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
( fputs (".lcomm ", (FILE)),			\
  assemble_name ((FILE), (NAME)),		\
  fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", (ROUNDED)))


/* APPLE LOCAL begin Macintosh alignment 2002-2-19 --ff */
#define MASK_ALIGN_NATURAL	0x40000000
#define TARGET_ALIGN_NATURAL	(target_flags & MASK_ALIGN_NATURAL)
#define rs6000_alignment_flags target_flags
#define MASK_ALIGN_MAC68K	0x20000000
#define TARGET_ALIGN_MAC68K	(target_flags & MASK_ALIGN_MAC68K)

#undef SUBTARGET_SWITCHES
#define SUBTARGET_SWITCHES						\
  {"align-mac68k",      MASK_ALIGN_MAC68K,				\
	N_("Align structs and unions according to mac68k rules")},	\
  {"align-power",       - (MASK_ALIGN_MAC68K | MASK_ALIGN_NATURAL),	\
	N_("Align structs and unions according to PowerPC rules")},	\
  {"align-natural",     MASK_ALIGN_NATURAL,				\
	N_("Align structs and unions according to natural rules")},	\
  {"dynamic-no-pic",    MASK_MACHO_DYNAMIC_NO_PIC,			\
	N_("Generate code suitable for executables (NOT shared libs)")},\
  {"no-dynamic-no-pic", -MASK_MACHO_DYNAMIC_NO_PIC,  ""},
/* APPLE LOCAL end Macintosh alignment 2002-2-19 --ff */

/* Darwin profiling -- call mcount.  */
#undef FUNCTION_PROFILER
#define FUNCTION_PROFILER(FILE, LABELNO)				\
    do {								\
      if (MACHOPIC_INDIRECT)						\
	{								\
	  const char *name = machopic_stub_name ("*mcount");		\
	  fprintf (FILE, "\tcall %s\n", name+1);  /*  skip '&'  */	\
	  machopic_validate_stub_or_non_lazy_ptr (name, /*stub:*/1);	\
	}								\
      else fprintf (FILE, "\tcall mcount\n");				\
    } while (0)

/* APPLE LOCAL SSE stack alignment */
#define BASIC_STACK_BOUNDARY (128)

#undef SUBTARGET_OVERRIDE_OPTIONS
/* Force Darwin/x86 to default as "-march=i686 -mcpu=pentium4".  */
#define SUBTARGET_OVERRIDE_OPTIONS \
  do { \
    if (!ix86_arch_string) ix86_arch_string = "pentiumpro"; \
    if (!ix86_tune_string) ix86_tune_string = "pentium4"; \
  } while (0)