gcc/config/i386/x86-64.h

   1 /* OS independent definitions for AMD x86-64.
   2    Copyright (C) 2001, 2005, 2007, 2009, 2010, 2011
   3    Free Software Foundation, Inc.
   4    Contributed by Bo Thorsen <bo@suse.de>.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 Under Section 7 of GPL version 3, you are granted additional
  19 permissions described in the GCC Runtime Library Exception, version
  20 3.1, as published by the Free Software Foundation.
  21
  22 You should have received a copy of the GNU General Public License and
  23 a copy of the GCC Runtime Library Exception along with this program;
  24 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  25 <http://www.gnu.org/licenses/>.  */
  26
  27 #undef ASM_COMMENT_START
  28 #define ASM_COMMENT_START "#"
  29
  30 #undef DBX_REGISTER_NUMBER
  31 #define DBX_REGISTER_NUMBER(n) \
  32   (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
  33
  34 /* Output assembler code to FILE to call the profiler.  */
  35 #define NO_PROFILE_COUNTERS 1
  36
  37 #undef MCOUNT_NAME
  38 #define MCOUNT_NAME "mcount"
  39
  40 #undef SIZE_TYPE
  41 #define SIZE_TYPE (TARGET_LP64 ? "long unsigned int" : "unsigned int")
  42
  43 #undef PTRDIFF_TYPE
  44 #define PTRDIFF_TYPE (TARGET_LP64 ? "long int" : "int")
  45
  46 #undef WCHAR_TYPE
  47 #define WCHAR_TYPE "int"
  48
  49 #undef WCHAR_TYPE_SIZE
  50 #define WCHAR_TYPE_SIZE 32
  51
  52 #undef ASM_SPEC
  53 #define ASM_SPEC "%{m32:--32} %{m64:--64}"
  54
  55 #undef ASM_OUTPUT_ALIGNED_BSS
  56 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
  57   x86_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
  58
  59 #undef  ASM_OUTPUT_ALIGNED_COMMON
  60 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
  61   x86_elf_aligned_common (FILE, NAME, SIZE, ALIGN);
  62
  63 /* This is used to align code labels according to Intel recommendations.  */
  64
  65 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
  66 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP)                    \
  67   do {                                                                  \
  68     if ((LOG) != 0) {                                                   \
  69       if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));  \
  70       else {                                                            \
  71         fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));     \
  72         /* Make sure that we have at least 8 byte alignment if > 8 byte \
  73            alignment is preferred.  */                                  \
  74         if ((LOG) > 3                                                   \
  75             && (1 << (LOG)) > ((MAX_SKIP) + 1)                          \
  76             && (MAX_SKIP) >= 7)                                         \
  77           fputs ("\t.p2align 3\n", (FILE));                             \
  78       }                                                                 \
  79     }                                                                   \
  80   } while (0)
  81 #undef  ASM_OUTPUT_MAX_SKIP_PAD
  82 #define ASM_OUTPUT_MAX_SKIP_PAD(FILE, LOG, MAX_SKIP)                    \
  83   if ((LOG) != 0)                                                       \
  84     {                                                                   \
  85       if ((MAX_SKIP) == 0)                                              \
  86         fprintf ((FILE), "\t.p2align %d\n", (LOG));                     \
  87       else                                                              \
  88         fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));     \
  89     }
  90 #endif
  91
  92
  93 /* i386 System V Release 4 uses DWARF debugging info.
  94    x86-64 ABI specifies DWARF2.  */
  95
  96 #define DWARF2_DEBUGGING_INFO 1
  97 #define DWARF2_UNWIND_INFO 1
  98
  99 #undef PREFERRED_DEBUGGING_TYPE
 100 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
 101
 102 #undef TARGET_ASM_SELECT_SECTION
 103 #define TARGET_ASM_SELECT_SECTION  x86_64_elf_select_section
 104
 105 #undef TARGET_ASM_UNIQUE_SECTION
 106 #define TARGET_ASM_UNIQUE_SECTION  x86_64_elf_unique_section