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annotate gcc/config/i386/x86-64.h @ 67:f6334be47118

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update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
author nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
date Tue, 22 Mar 2011 17:18:12 +0900
parents 77e2b8dfacca
children 04ced10e8804
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1 /* OS independent definitions for AMD x86-64.
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2 Copyright (C) 2001, 2005, 2007, 2009, 2010, 2011
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3 Free Software Foundation, Inc.
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4 Contributed by Bo Thorsen <bo@suse.de>.
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5
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6 This file is part of GCC.
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7
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8 GCC is free software; you can redistribute it and/or modify
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9 it under the terms of the GNU General Public License as published by
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10 the Free Software Foundation; either version 3, or (at your option)
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11 any later version.
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12
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13 GCC is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 Under Section 7 of GPL version 3, you are granted additional
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19 permissions described in the GCC Runtime Library Exception, version
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20 3.1, as published by the Free Software Foundation.
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21
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22 You should have received a copy of the GNU General Public License and
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23 a copy of the GCC Runtime Library Exception along with this program;
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24 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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25 <http://www.gnu.org/licenses/>. */
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26
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27 #undef ASM_COMMENT_START
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28 #define ASM_COMMENT_START "#"
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29
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30 #undef DBX_REGISTER_NUMBER
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31 #define DBX_REGISTER_NUMBER(n) \
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32 (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
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33
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34 /* Output assembler code to FILE to call the profiler. */
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35 #define NO_PROFILE_COUNTERS 1
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36
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37 #undef MCOUNT_NAME
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38 #define MCOUNT_NAME "mcount"
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39
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40 #undef SIZE_TYPE
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41 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int")
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42
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43 #undef PTRDIFF_TYPE
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44 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int")
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45
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46 #undef WCHAR_TYPE
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47 #define WCHAR_TYPE "int"
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48
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49 #undef WCHAR_TYPE_SIZE
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50 #define WCHAR_TYPE_SIZE 32
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51
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52 #undef ASM_SPEC
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53 #define ASM_SPEC "%{m32:--32} %{m64:--64}"
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54
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55 #undef ASM_OUTPUT_ALIGNED_BSS
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56 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
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57 x86_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
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58
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59 #undef ASM_OUTPUT_ALIGNED_COMMON
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60 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \
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61 x86_elf_aligned_common (FILE, NAME, SIZE, ALIGN);
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62
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63 /* This is used to align code labels according to Intel recommendations. */
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64
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65 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
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66 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
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67 do { \
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68 if ((LOG) != 0) { \
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69 if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
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70 else { \
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71 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
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72 /* Make sure that we have at least 8 byte alignment if > 8 byte \
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73 alignment is preferred. */ \
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74 if ((LOG) > 3 \
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75 && (1 << (LOG)) > ((MAX_SKIP) + 1) \
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76 && (MAX_SKIP) >= 7) \
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77 fputs ("\t.p2align 3\n", (FILE)); \
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78 } \
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79 } \
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80 } while (0)
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81 #undef ASM_OUTPUT_MAX_SKIP_PAD
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82 #define ASM_OUTPUT_MAX_SKIP_PAD(FILE, LOG, MAX_SKIP) \
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83 if ((LOG) != 0) \
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84 { \
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85 if ((MAX_SKIP) == 0) \
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86 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
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87 else \
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88 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \
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89 }
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90 #endif
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91
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92
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93 /* i386 System V Release 4 uses DWARF debugging info.
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94 x86-64 ABI specifies DWARF2. */
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95
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96 #define DWARF2_DEBUGGING_INFO 1
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97 #define DWARF2_UNWIND_INFO 1
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98
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99 #undef PREFERRED_DEBUGGING_TYPE
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100 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
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101
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102 #undef TARGET_ASM_SELECT_SECTION
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103 #define TARGET_ASM_SELECT_SECTION x86_64_elf_select_section
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104
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105 #undef TARGET_ASM_UNIQUE_SECTION
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106 #define TARGET_ASM_UNIQUE_SECTION x86_64_elf_unique_section