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 GNU CC.
   6
   7 GNU CC 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 GNU CC 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 GNU CC; 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 /* The Darwin assembler mostly follows AT&T syntax.  */
  45 #undef ASSEMBLER_DIALECT
  46 #define ASSEMBLER_DIALECT ASM_ATT
  47
  48 /* Define macro used to output shift-double opcodes when the shift
  49    count is in %cl.  Some assemblers require %cl as an argument;
  50    some don't.  This macro controls what to do: by default, don't
  51    print %cl.  */
  52
  53 #define SHIFT_DOUBLE_OMITS_COUNT 0
  54
  55 /* Define the syntax of pseudo-ops, labels and comments.  */
  56
  57 /* String containing the assembler's comment-starter.  */
  58
  59 #define ASM_COMMENT_START "#"
  60
  61 /* By default, target has a 80387, uses IEEE compatible arithmetic,
  62    and returns float values in the 387.  */
  63
  64 #define TARGET_SUBTARGET_DEFAULT (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS)
  65
  66 /* TARGET_DEEP_BRANCH_PREDICTION is incompatible with Mach-O PIC.  */
  67
  68 #undef TARGET_DEEP_BRANCH_PREDICTION
  69 #define TARGET_DEEP_BRANCH_PREDICTION   0
  70
  71 /* Define the syntax of pseudo-ops, labels and comments.  */
  72
  73 #define LPREFIX "L"
  74
  75 /* Assembler pseudos to introduce constants of various size.  */
  76
  77 #define ASM_BYTE_OP "\t.byte\t"
  78 #define ASM_SHORT "\t.word\t"
  79 #define ASM_LONG "\t.long\t"
  80 /* Darwin as doesn't do ".quad".  */
  81
  82 #undef ASM_OUTPUT_ALIGN
  83 #define ASM_OUTPUT_ALIGN(FILE,LOG)      \
  84  do { if ((LOG) != 0)                   \
  85         {                               \
  86           if (in_text_section ())       \
  87             fprintf (FILE, "\t%s %d,0x90\n", ALIGN_ASM_OP, (LOG)); \
  88           else                          \
  89             fprintf (FILE, "\t%s %d\n", ALIGN_ASM_OP, (LOG)); \
  90         }                               \
  91     } while (0)
  92
  93 /* This says how to output an assembler line
  94    to define a global common symbol.  */
  95
  96 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)  \
  97 ( fputs (".comm ", (FILE)),                     \
  98   assemble_name ((FILE), (NAME)),               \
  99   fprintf ((FILE), ",%u\n", (ROUNDED)))
 100
 101 /* This says how to output an assembler line
 102    to define a local common symbol.  */
 103
 104 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)  \
 105 ( fputs (".lcomm ", (FILE)),                    \
 106   assemble_name ((FILE), (NAME)),               \
 107   fprintf ((FILE), ",%u\n", (ROUNDED)))
 108
 109 /* Darwin profiling -- call mcount.  */
 110 #undef FUNCTION_PROFILER
 111 #define FUNCTION_PROFILER(FILE, LABELNO)                                \
 112     do {                                                                \
 113       if (MACHOPIC_INDIRECT)                                            \
 114         {                                                               \
 115           const char *name = machopic_stub_name ("*mcount");            \
 116           fprintf (FILE, "\tcall %s\n", name+1);  /*  skip '&'  */      \
 117           machopic_validate_stub_or_non_lazy_ptr (name, /*stub:*/1);    \
 118         }                                                               \
 119       else fprintf (FILE, "\tcall mcount\n");                           \
 120     } while (0)