gcc/config/i386/darwin.h

   1 /* Target definitions for x86 running Darwin.
   2    Copyright (C) 2001, 2002 Free Software Foundation, Inc.
   3    Contributed by Apple Computer Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 /* Enable Mach-O bits in generic x86 code.  */
  23 #undef TARGET_MACHO
  24 #define TARGET_MACHO 1
  25
  26 #define TARGET_VERSION fprintf (stderr, " (i386 Darwin)");
  27
  28 #define TARGET_OS_CPP_BUILTINS()                \
  29   do                                            \
  30     {                                           \
  31       builtin_define ("__i386__");              \
  32       builtin_define ("__LITTLE_ENDIAN__");     \
  33       builtin_define ("__MACH__");              \
  34       builtin_define ("__APPLE__");             \
  35     }                                           \
  36   while (0)
  37
  38 /* We want -fPIC by default, unless we're using -static to compile for
  39    the kernel or some such.  */
  40
  41 #undef CC1_SPEC
  42 #define CC1_SPEC "%{!static:-fPIC}"
  43
  44 #define ASM_SPEC "-arch i386 \
  45   %{Zforce_cpusubtype_ALL:-force_cpusubtype_ALL} \
  46   %{!Zforce_cpusubtype_ALL:%{mmmx:-force_cpusubtype_ALL}\
  47                            %{msse:-force_cpusubtype_ALL}\
  48                            %{msse2:-force_cpusubtype_ALL}}"
  49
  50 #undef SUBTARGET_EXTRA_SPECS
  51 #define SUBTARGET_EXTRA_SPECS                   \
  52   { "darwin_arch", "i386" },
  53
  54 /* The Darwin assembler mostly follows AT&T syntax.  */
  55 #undef ASSEMBLER_DIALECT
  56 #define ASSEMBLER_DIALECT ASM_ATT
  57
  58 /* Define macro used to output shift-double opcodes when the shift
  59    count is in %cl.  Some assemblers require %cl as an argument;
  60    some don't.  This macro controls what to do: by default, don't
  61    print %cl.  */
  62
  63 #define SHIFT_DOUBLE_OMITS_COUNT 0
  64
  65 /* Define the syntax of pseudo-ops, labels and comments.  */
  66
  67 /* String containing the assembler's comment-starter.  */
  68
  69 #define ASM_COMMENT_START "#"
  70
  71 /* By default, target has a 80387, uses IEEE compatible arithmetic,
  72    and returns float values in the 387.  */
  73
  74 #define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS)
  75
  76 /* TARGET_DEEP_BRANCH_PREDICTION is incompatible with Mach-O PIC.  */
  77
  78 #undef TARGET_DEEP_BRANCH_PREDICTION
  79 #define TARGET_DEEP_BRANCH_PREDICTION   0
  80
  81 /* For now, disable dynamic-no-pic.  We'll need to go through i386.c
  82    with a fine-tooth comb looking for refs to flag_pic!  */
  83 #define MASK_MACHO_DYNAMIC_NO_PIC 0
  84 #define TARGET_DYNAMIC_NO_PIC     (target_flags & MASK_MACHO_DYNAMIC_NO_PIC)
  85
  86 /* Define the syntax of pseudo-ops, labels and comments.  */
  87
  88 #define LPREFIX "L"
  89
  90 /* Assembler pseudos to introduce constants of various size.  */
  91
  92 #define ASM_BYTE_OP "\t.byte\t"
  93 #define ASM_SHORT "\t.word\t"
  94 #define ASM_LONG "\t.long\t"
  95 /* Darwin as doesn't do ".quad".  */
  96
  97 #undef ASM_OUTPUT_ALIGN
  98 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
  99  do { if ((LOG) != 0)                   \
 100         {                               \
 101           if (in_text_section ())       \
 102             fprintf (FILE, "\t%s %d,0x90\n", ALIGN_ASM_OP, (LOG)); \
 103           else                          \
 104             fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG)); \
 105         }                               \
 106     } while (0)
 107
 108 /* This says how to output an assembler line
 109    to define a global common symbol.  */
 110
 111 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
 112 ( fputs (".comm ", (FILE)),                     \
 113   assemble_name ((FILE), (NAME)),               \
 114   fprintf ((FILE), ",%lu\n", (unsigned long)(ROUNDED)))
 115
 116 /* This says how to output an assembler line
 117    to define a local common symbol.  */
 118
 119 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
 120 ( fputs (".lcomm ", (FILE)),                    \
 121   assemble_name ((FILE), (NAME)),               \
 122   fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED"\n", (ROUNDED)))
 123
 124 /* Darwin profiling -- call mcount.  */
 125 #undef FUNCTION_PROFILER
 126 #define FUNCTION_PROFILER(FILE, LABELNO)                                \
 127     do {                                                                \
 128       if (MACHOPIC_INDIRECT)                                            \
 129         {                                                               \
 130           const char *name = machopic_stub_name ("*mcount");            \
 131           fprintf (FILE, "\tcall %s\n", name+1);  /*  skip '&'  */      \
 132           machopic_validate_stub_or_non_lazy_ptr (name, /*stub:*/1);    \
 133         }                                                               \
 134       else fprintf (FILE, "\tcall mcount\n");                           \
 135     } while (0)