annotate gcc/cppbuiltin.c @ 111:04ced10e8804

gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents 561a7518be6b
children 84e7813d76e9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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1 /* Define builtin-in macros for all front ends that perform preprocessing
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2 Copyright (C) 2010-2017 Free Software Foundation, Inc.
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3
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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16 You should have received a copy of the GNU General Public License
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #include "config.h"
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21 #include "system.h"
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22 #include "coretypes.h"
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23 #include "memmodel.h"
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24 #include "target.h"
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25 #include "tree.h"
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26 #include "version.h"
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27 #include "flags.h"
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28 #include "cpp-id-data.h"
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29 #include "cppbuiltin.h"
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30
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31
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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32 /* Parse a BASEVER version string of the format "major.minor.patchlevel"
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33 or "major.minor" to extract its components. */
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34 void
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35 parse_basever (int *major, int *minor, int *patchlevel)
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36 {
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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37 static int s_major = -1, s_minor, s_patchlevel;
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38
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39 if (s_major == -1)
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40 if (sscanf (BASEVER, "%d.%d.%d", &s_major, &s_minor, &s_patchlevel) != 3)
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41 {
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42 sscanf (BASEVER, "%d.%d", &s_major, &s_minor);
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43 s_patchlevel = 0;
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44 }
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45
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46 if (major)
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47 *major = s_major;
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48
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49 if (minor)
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50 *minor = s_minor;
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51
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52 if (patchlevel)
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53 *patchlevel = s_patchlevel;
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54 }
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56
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57 /* Define __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__ and __VERSION__. */
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Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
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58 static void
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59 define__GNUC__ (cpp_reader *pfile)
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60 {
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61 int major, minor, patchlevel;
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62
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63 parse_basever (&major, &minor, &patchlevel);
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64 cpp_define_formatted (pfile, "__GNUC__=%d", major);
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65 cpp_define_formatted (pfile, "__GNUC_MINOR__=%d", minor);
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66 cpp_define_formatted (pfile, "__GNUC_PATCHLEVEL__=%d", patchlevel);
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67 cpp_define_formatted (pfile, "__VERSION__=\"%s\"", version_string);
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68 cpp_define_formatted (pfile, "__ATOMIC_RELAXED=%d", MEMMODEL_RELAXED);
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69 cpp_define_formatted (pfile, "__ATOMIC_SEQ_CST=%d", MEMMODEL_SEQ_CST);
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70 cpp_define_formatted (pfile, "__ATOMIC_ACQUIRE=%d", MEMMODEL_ACQUIRE);
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71 cpp_define_formatted (pfile, "__ATOMIC_RELEASE=%d", MEMMODEL_RELEASE);
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72 cpp_define_formatted (pfile, "__ATOMIC_ACQ_REL=%d", MEMMODEL_ACQ_REL);
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73 cpp_define_formatted (pfile, "__ATOMIC_CONSUME=%d", MEMMODEL_CONSUME);
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74 }
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76
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77 /* Define various built-in CPP macros that depend on language-independent
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78 compilation flags. */
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79 static void
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80 define_builtin_macros_for_compilation_flags (cpp_reader *pfile)
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81 {
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82 if (flag_pic)
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83 {
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84 cpp_define_formatted (pfile, "__pic__=%d", flag_pic);
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85 cpp_define_formatted (pfile, "__PIC__=%d", flag_pic);
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86 }
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87 if (flag_pie)
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88 {
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89 cpp_define_formatted (pfile, "__pie__=%d", flag_pie);
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90 cpp_define_formatted (pfile, "__PIE__=%d", flag_pie);
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91 }
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92
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93 if (flag_sanitize & SANITIZE_ADDRESS)
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94 cpp_define (pfile, "__SANITIZE_ADDRESS__");
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95
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96 if (flag_sanitize & SANITIZE_THREAD)
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97 cpp_define (pfile, "__SANITIZE_THREAD__");
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98
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99 if (optimize_size)
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100 cpp_define (pfile, "__OPTIMIZE_SIZE__");
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101 if (optimize)
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102 cpp_define (pfile, "__OPTIMIZE__");
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103
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104 if (fast_math_flags_set_p (&global_options))
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105 cpp_define (pfile, "__FAST_MATH__");
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106 if (flag_signaling_nans)
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107 cpp_define (pfile, "__SUPPORT_SNAN__");
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108 if (!flag_errno_math)
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109 cpp_define (pfile, "__NO_MATH_ERRNO__");
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110
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111 cpp_define_formatted (pfile, "__FINITE_MATH_ONLY__=%d",
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112 flag_finite_math_only);
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113 if (flag_cilkplus)
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114 cpp_define (pfile, "__cilk=200");
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115
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116 if (flag_check_pointer_bounds)
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117 cpp_define (pfile, "__CHKP__");
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118 }
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119
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120
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121 /* Define built-in macros for LP64 targets. */
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122 static void
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123 define_builtin_macros_for_lp64 (cpp_reader *pfile)
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124 {
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125 if (TYPE_PRECISION (long_integer_type_node) == 64
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126 && POINTER_SIZE == 64
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127 && TYPE_PRECISION (integer_type_node) == 32)
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128 {
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129 cpp_define (pfile, "_LP64");
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130 cpp_define (pfile, "__LP64__");
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131 }
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132 }
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133
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134
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135 /* Define macros for size of basic C types. */
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136 static void
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137 define_builtin_macros_for_type_sizes (cpp_reader *pfile)
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138 {
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139 #define define_type_sizeof(NAME, TYPE) \
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140 cpp_define_formatted (pfile, NAME"=" HOST_WIDE_INT_PRINT_DEC, \
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141 tree_to_uhwi (TYPE_SIZE_UNIT (TYPE)))
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142
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143 define_type_sizeof ("__SIZEOF_INT__", integer_type_node);
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144 define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node);
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145 define_type_sizeof ("__SIZEOF_LONG_LONG__", long_long_integer_type_node);
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146 define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node);
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147 define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node);
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148 define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node);
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149 define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node);
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150 define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node);
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151
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152 #undef define_type_sizeof
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153
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154 cpp_define_formatted (pfile, "__CHAR_BIT__=%u",
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155 TYPE_PRECISION (char_type_node));
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156 cpp_define_formatted (pfile, "__BIGGEST_ALIGNMENT__=%d",
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157 BIGGEST_ALIGNMENT / BITS_PER_UNIT);
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158
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159 /* Define constants useful for implementing endian.h. */
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160 cpp_define (pfile, "__ORDER_LITTLE_ENDIAN__=1234");
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161 cpp_define (pfile, "__ORDER_BIG_ENDIAN__=4321");
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162 cpp_define (pfile, "__ORDER_PDP_ENDIAN__=3412");
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163
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164 if (WORDS_BIG_ENDIAN == BYTES_BIG_ENDIAN)
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165 cpp_define_formatted (pfile, "__BYTE_ORDER__=%s",
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166 (WORDS_BIG_ENDIAN
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167 ? "__ORDER_BIG_ENDIAN__"
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168 : "__ORDER_LITTLE_ENDIAN__"));
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169 else
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170 {
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171 /* Assert that we're only dealing with the PDP11 case. */
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172 gcc_assert (!BYTES_BIG_ENDIAN);
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173 gcc_assert (WORDS_BIG_ENDIAN);
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174
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175 cpp_define (pfile, "__BYTE_ORDER__=__ORDER_PDP_ENDIAN__");
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176 }
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177
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178 cpp_define_formatted (pfile, "__FLOAT_WORD_ORDER__=%s",
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179 (targetm.float_words_big_endian ()
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180 ? "__ORDER_BIG_ENDIAN__"
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181 : "__ORDER_LITTLE_ENDIAN__"));
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182
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183 /* ptr_type_node can't be used here since ptr_mode is only set when
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184 toplev calls backend_init which is not done with -E switch. */
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185 cpp_define_formatted (pfile, "__SIZEOF_POINTER__=%d",
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186 1 << ceil_log2 ((POINTER_SIZE + BITS_PER_UNIT - 1) / BITS_PER_UNIT));
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187 }
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188
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189
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190 /* Define macros builtins common to all language performing CPP
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191 preprocessing. */
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192 void
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193 define_language_independent_builtin_macros (cpp_reader *pfile)
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194 {
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195 define__GNUC__ (pfile);
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196 define_builtin_macros_for_compilation_flags (pfile);
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197 define_builtin_macros_for_lp64 (pfile);
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198 define_builtin_macros_for_type_sizes (pfile);
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199 }