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4358 | Serge | 1 | /* |
2 | * Mesa 3-D graphics library |
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3 | * |
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4 | * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. |
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5 | * Copyright (C) 2009 VMware, Inc. All Rights Reserved. |
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6 | * |
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7 | * Permission is hereby granted, free of charge, to any person obtaining a |
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8 | * copy of this software and associated documentation files (the "Software"), |
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9 | * to deal in the Software without restriction, including without limitation |
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10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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11 | * and/or sell copies of the Software, and to permit persons to whom the |
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12 | * Software is furnished to do so, subject to the following conditions: |
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13 | * |
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14 | * The above copyright notice and this permission notice shall be included |
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15 | * in all copies or substantial portions of the Software. |
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16 | * |
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17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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18 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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21 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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22 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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23 | * OTHER DEALINGS IN THE SOFTWARE. |
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24 | */ |
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25 | |||
26 | |||
27 | /** |
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28 | * \file compiler.h |
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29 | * Compiler-related stuff. |
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30 | */ |
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31 | |||
32 | |||
33 | #ifndef COMPILER_H |
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34 | #define COMPILER_H |
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35 | |||
36 | |||
37 | #include |
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38 | #include |
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39 | #if defined(__alpha__) && defined(CCPML) |
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40 | #include |
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41 | #else |
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42 | #include |
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43 | #endif |
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44 | #include |
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45 | #include |
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46 | #include |
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47 | #include |
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48 | #include |
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49 | #include |
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50 | |||
51 | #include "c99_compat.h" /* inline, __func__, etc. */ |
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52 | |||
53 | |||
54 | #ifdef __cplusplus |
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55 | extern "C" { |
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56 | #endif |
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57 | |||
58 | |||
59 | /** |
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60 | * Get standard integer types |
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61 | */ |
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62 | #include |
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63 | |||
64 | |||
65 | /** |
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66 | * Sun compilers define __i386 instead of the gcc-style __i386__ |
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67 | */ |
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68 | #ifdef __SUNPRO_C |
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69 | # if !defined(__i386__) && defined(__i386) |
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70 | # define __i386__ |
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71 | # elif !defined(__amd64__) && defined(__amd64) |
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72 | # define __amd64__ |
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73 | # elif !defined(__sparc__) && defined(__sparc) |
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74 | # define __sparc__ |
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75 | # endif |
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76 | # if !defined(__volatile) |
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77 | # define __volatile volatile |
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78 | # endif |
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79 | #endif |
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80 | |||
81 | |||
82 | /** |
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83 | * finite macro. |
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84 | */ |
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85 | #if defined(_MSC_VER) |
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86 | # define finite _finite |
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87 | #elif defined(__WATCOMC__) |
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88 | # define finite _finite |
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89 | #endif |
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90 | |||
91 | |||
92 | /** |
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93 | * Disable assorted warnings |
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94 | */ |
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95 | #if !defined(OPENSTEP) && (defined(_WIN32) && !defined(__CYGWIN__)) && !defined(BUILD_FOR_SNAP) |
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96 | # if !defined(__GNUC__) /* mingw environment */ |
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97 | # pragma warning( disable : 4068 ) /* unknown pragma */ |
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98 | # pragma warning( disable : 4710 ) /* function 'foo' not inlined */ |
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99 | # pragma warning( disable : 4711 ) /* function 'foo' selected for automatic inline expansion */ |
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100 | # pragma warning( disable : 4127 ) /* conditional expression is constant */ |
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101 | # if defined(MESA_MINWARN) |
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102 | # pragma warning( disable : 4244 ) /* '=' : conversion from 'const double ' to 'float ', possible loss of data */ |
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103 | # pragma warning( disable : 4018 ) /* '<' : signed/unsigned mismatch */ |
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104 | # pragma warning( disable : 4305 ) /* '=' : truncation from 'const double ' to 'float ' */ |
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105 | # pragma warning( disable : 4550 ) /* 'function' undefined; assuming extern returning int */ |
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106 | # pragma warning( disable : 4761 ) /* integral size mismatch in argument; conversion supplied */ |
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107 | # endif |
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108 | # endif |
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109 | #endif |
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110 | #if defined(__WATCOMC__) |
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111 | # pragma disable_message(201) /* Disable unreachable code warnings */ |
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112 | #endif |
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113 | |||
114 | |||
115 | |||
116 | /* XXX: Use standard `inline` keyword instead */ |
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117 | #ifndef INLINE |
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118 | # define INLINE inline |
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119 | #endif |
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120 | |||
121 | |||
122 | /** |
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123 | * PUBLIC/USED macros |
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124 | * |
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125 | * If we build the library with gcc's -fvisibility=hidden flag, we'll |
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126 | * use the PUBLIC macro to mark functions that are to be exported. |
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127 | * |
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128 | * We also need to define a USED attribute, so the optimizer doesn't |
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129 | * inline a static function that we later use in an alias. - ajax |
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130 | */ |
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131 | #ifndef PUBLIC |
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132 | # if (defined(__GNUC__) && __GNUC__ >= 4) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590)) |
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133 | # define PUBLIC __attribute__((visibility("default"))) |
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134 | # define USED __attribute__((used)) |
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135 | # else |
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136 | # define PUBLIC |
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137 | # define USED |
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138 | # endif |
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139 | #endif |
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140 | |||
141 | |||
142 | /** |
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143 | * __builtin_expect macros |
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144 | */ |
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145 | #if !defined(__GNUC__) |
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146 | # define __builtin_expect(x, y) (x) |
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147 | #endif |
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148 | |||
149 | #ifndef likely |
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150 | # ifdef __GNUC__ |
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151 | # define likely(x) __builtin_expect(!!(x), 1) |
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152 | # define unlikely(x) __builtin_expect(!!(x), 0) |
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153 | # else |
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154 | # define likely(x) (x) |
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155 | # define unlikely(x) (x) |
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156 | # endif |
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157 | #endif |
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158 | |||
159 | /* XXX: Use standard `__func__` instead */ |
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160 | #ifndef __FUNCTION__ |
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161 | # define __FUNCTION__ __func__ |
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162 | #endif |
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163 | |||
164 | /** |
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165 | * Either define MESA_BIG_ENDIAN or MESA_LITTLE_ENDIAN, and CPU_TO_LE32. |
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166 | * Do not use these unless absolutely necessary! |
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167 | * Try to use a runtime test instead. |
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168 | * For now, only used by some DRI hardware drivers for color/texel packing. |
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169 | */ |
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170 | #if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN |
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171 | #if defined(__linux__) |
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172 | #include |
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173 | #define CPU_TO_LE32( x ) bswap_32( x ) |
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174 | #elif defined(__APPLE__) |
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175 | #include |
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176 | #define CPU_TO_LE32( x ) CFSwapInt32HostToLittle( x ) |
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177 | #elif (defined(_AIX) || defined(__blrts)) |
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178 | static INLINE GLuint CPU_TO_LE32(GLuint x) |
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179 | { |
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180 | return (((x & 0x000000ff) << 24) | |
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181 | ((x & 0x0000ff00) << 8) | |
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182 | ((x & 0x00ff0000) >> 8) | |
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183 | ((x & 0xff000000) >> 24)); |
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184 | } |
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185 | #elif defined(__OpenBSD__) |
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186 | #include |
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187 | #define CPU_TO_LE32( x ) htole32( x ) |
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188 | #else /*__linux__ */ |
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189 | #include |
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190 | #define CPU_TO_LE32( x ) bswap32( x ) |
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191 | #endif /*__linux__*/ |
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192 | #define MESA_BIG_ENDIAN 1 |
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193 | #else |
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194 | #define CPU_TO_LE32( x ) ( x ) |
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195 | #define MESA_LITTLE_ENDIAN 1 |
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196 | #endif |
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197 | #define LE32_TO_CPU( x ) CPU_TO_LE32( x ) |
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198 | |||
199 | |||
200 | |||
201 | #if !defined(CAPI) && defined(_WIN32) && !defined(BUILD_FOR_SNAP) |
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202 | #define CAPI _cdecl |
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203 | #endif |
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204 | |||
205 | |||
206 | /** |
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207 | * Create a macro so that asm functions can be linked into compilers other |
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208 | * than GNU C |
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209 | */ |
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210 | #ifndef _ASMAPI |
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211 | #if defined(_WIN32) && !defined(BUILD_FOR_SNAP)/* was: !defined( __GNUC__ ) && !defined( VMS ) && !defined( __INTEL_COMPILER )*/ |
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212 | #define _ASMAPI __cdecl |
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213 | #else |
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214 | #define _ASMAPI |
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215 | #endif |
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216 | #ifdef PTR_DECL_IN_FRONT |
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217 | #define _ASMAPIP * _ASMAPI |
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218 | #else |
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219 | #define _ASMAPIP _ASMAPI * |
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220 | #endif |
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221 | #endif |
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222 | |||
223 | #ifdef USE_X86_ASM |
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224 | #define _NORMAPI _ASMAPI |
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225 | #define _NORMAPIP _ASMAPIP |
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226 | #else |
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227 | #define _NORMAPI |
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228 | #define _NORMAPIP * |
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229 | #endif |
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230 | |||
231 | |||
232 | /* Turn off macro checking systems used by other libraries */ |
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233 | #ifdef CHECK |
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234 | #undef CHECK |
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235 | #endif |
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236 | |||
237 | |||
238 | /** |
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239 | * ASSERT macro |
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240 | */ |
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241 | #if !defined(_WIN32_WCE) |
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242 | #if defined(BUILD_FOR_SNAP) && defined(CHECKED) |
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243 | # define ASSERT(X) _CHECK(X) |
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244 | #elif defined(DEBUG) |
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245 | # define ASSERT(X) assert(X) |
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246 | #else |
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247 | # define ASSERT(X) |
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248 | #endif |
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249 | #endif |
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250 | |||
251 | |||
252 | /** |
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253 | * Static (compile-time) assertion. |
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254 | * Basically, use COND to dimension an array. If COND is false/zero the |
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255 | * array size will be -1 and we'll get a compilation error. |
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256 | */ |
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257 | #define STATIC_ASSERT(COND) \ |
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258 | do { \ |
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259 | (void) sizeof(char [1 - 2*!(COND)]); \ |
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260 | } while (0) |
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261 | |||
262 | |||
263 | #if (__GNUC__ >= 3) |
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264 | #define PRINTFLIKE(f, a) __attribute__ ((format(__printf__, f, a))) |
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265 | #else |
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266 | #define PRINTFLIKE(f, a) |
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267 | #endif |
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268 | |||
269 | #ifndef NULL |
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270 | #define NULL 0 |
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271 | #endif |
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272 | |||
273 | |||
274 | /** |
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275 | * LONGSTRING macro |
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276 | * gcc -pedantic warns about long string literals, LONGSTRING silences that. |
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277 | */ |
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278 | #if !defined(__GNUC__) |
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279 | # define LONGSTRING |
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280 | #else |
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281 | # define LONGSTRING __extension__ |
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282 | #endif |
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283 | |||
284 | |||
285 | #ifndef M_PI |
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286 | #define M_PI (3.14159265358979323846) |
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287 | #endif |
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288 | |||
289 | #ifndef M_E |
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290 | #define M_E (2.7182818284590452354) |
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291 | #endif |
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292 | |||
293 | #ifndef M_LOG2E |
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294 | #define M_LOG2E (1.4426950408889634074) |
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295 | #endif |
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296 | |||
297 | #ifndef ONE_DIV_SQRT_LN2 |
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298 | #define ONE_DIV_SQRT_LN2 (1.201122408786449815) |
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299 | #endif |
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300 | |||
301 | #ifndef FLT_MAX_EXP |
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302 | #define FLT_MAX_EXP 128 |
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303 | #endif |
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304 | |||
305 | |||
306 | /** |
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307 | * USE_IEEE: Determine if we're using IEEE floating point |
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308 | */ |
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309 | #if defined(__i386__) || defined(__386__) || defined(__sparc__) || \ |
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310 | defined(__s390__) || defined(__s390x__) || defined(__powerpc__) || \ |
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311 | defined(__x86_64__) || \ |
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312 | defined(__m68k__) || \ |
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313 | defined(ia64) || defined(__ia64__) || \ |
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314 | defined(__hppa__) || defined(hpux) || \ |
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315 | defined(__mips) || defined(_MIPS_ARCH) || \ |
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316 | defined(__arm__) || \ |
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317 | defined(__sh__) || defined(__m32r__) || \ |
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318 | (defined(__sun) && defined(_IEEE_754)) || \ |
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319 | defined(__alpha__) |
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320 | #define USE_IEEE |
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321 | #define IEEE_ONE 0x3f800000 |
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322 | #endif |
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323 | |||
324 | |||
325 | /** |
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326 | * START/END_FAST_MATH macros: |
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327 | * |
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328 | * START_FAST_MATH: Set x86 FPU to faster, 32-bit precision mode (and save |
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329 | * original mode to a temporary). |
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330 | * END_FAST_MATH: Restore x86 FPU to original mode. |
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331 | */ |
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332 | #if defined(__GNUC__) && defined(__i386__) |
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333 | /* |
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334 | * Set the x86 FPU control word to guarentee only 32 bits of precision |
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335 | * are stored in registers. Allowing the FPU to store more introduces |
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336 | * differences between situations where numbers are pulled out of memory |
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337 | * vs. situations where the compiler is able to optimize register usage. |
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338 | * |
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339 | * In the worst case, we force the compiler to use a memory access to |
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340 | * truncate the float, by specifying the 'volatile' keyword. |
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341 | */ |
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342 | /* Hardware default: All exceptions masked, extended double precision, |
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343 | * round to nearest (IEEE compliant): |
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344 | */ |
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345 | #define DEFAULT_X86_FPU 0x037f |
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346 | /* All exceptions masked, single precision, round to nearest: |
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347 | */ |
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348 | #define FAST_X86_FPU 0x003f |
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349 | /* The fldcw instruction will cause any pending FP exceptions to be |
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350 | * raised prior to entering the block, and we clear any pending |
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351 | * exceptions before exiting the block. Hence, asm code has free |
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352 | * reign over the FPU while in the fast math block. |
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353 | */ |
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354 | #if defined(NO_FAST_MATH) |
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355 | #define START_FAST_MATH(x) \ |
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356 | do { \ |
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357 | static GLuint mask = DEFAULT_X86_FPU; \ |
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358 | __asm__ ( "fnstcw %0" : "=m" (*&(x)) ); \ |
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359 | __asm__ ( "fldcw %0" : : "m" (mask) ); \ |
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360 | } while (0) |
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361 | #else |
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362 | #define START_FAST_MATH(x) \ |
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363 | do { \ |
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364 | static GLuint mask = FAST_X86_FPU; \ |
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365 | __asm__ ( "fnstcw %0" : "=m" (*&(x)) ); \ |
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366 | __asm__ ( "fldcw %0" : : "m" (mask) ); \ |
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367 | } while (0) |
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368 | #endif |
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369 | /* Restore original FPU mode, and clear any exceptions that may have |
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370 | * occurred in the FAST_MATH block. |
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371 | */ |
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372 | #define END_FAST_MATH(x) \ |
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373 | do { \ |
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374 | __asm__ ( "fnclex ; fldcw %0" : : "m" (*&(x)) ); \ |
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375 | } while (0) |
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376 | |||
377 | #elif defined(__WATCOMC__) && defined(__386__) |
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378 | #define DEFAULT_X86_FPU 0x037f /* See GCC comments above */ |
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379 | #define FAST_X86_FPU 0x003f /* See GCC comments above */ |
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380 | void _watcom_start_fast_math(unsigned short *x,unsigned short *mask); |
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381 | #pragma aux _watcom_start_fast_math = \ |
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382 | "fnstcw word ptr [eax]" \ |
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383 | "fldcw word ptr [ecx]" \ |
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384 | parm [eax] [ecx] \ |
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385 | modify exact []; |
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386 | void _watcom_end_fast_math(unsigned short *x); |
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387 | #pragma aux _watcom_end_fast_math = \ |
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388 | "fnclex" \ |
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389 | "fldcw word ptr [eax]" \ |
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390 | parm [eax] \ |
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391 | modify exact []; |
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392 | #if defined(NO_FAST_MATH) |
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393 | #define START_FAST_MATH(x) \ |
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394 | do { \ |
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395 | static GLushort mask = DEFAULT_X86_FPU; \ |
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396 | _watcom_start_fast_math(&x,&mask); \ |
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397 | } while (0) |
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398 | #else |
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399 | #define START_FAST_MATH(x) \ |
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400 | do { \ |
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401 | static GLushort mask = FAST_X86_FPU; \ |
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402 | _watcom_start_fast_math(&x,&mask); \ |
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403 | } while (0) |
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404 | #endif |
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405 | #define END_FAST_MATH(x) _watcom_end_fast_math(&x) |
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406 | |||
407 | #elif defined(_MSC_VER) && defined(_M_IX86) |
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408 | #define DEFAULT_X86_FPU 0x037f /* See GCC comments above */ |
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409 | #define FAST_X86_FPU 0x003f /* See GCC comments above */ |
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410 | #if defined(NO_FAST_MATH) |
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411 | #define START_FAST_MATH(x) do {\ |
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412 | static GLuint mask = DEFAULT_X86_FPU;\ |
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413 | __asm fnstcw word ptr [x]\ |
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414 | __asm fldcw word ptr [mask]\ |
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415 | } while(0) |
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416 | #else |
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417 | #define START_FAST_MATH(x) do {\ |
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418 | static GLuint mask = FAST_X86_FPU;\ |
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419 | __asm fnstcw word ptr [x]\ |
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420 | __asm fldcw word ptr [mask]\ |
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421 | } while(0) |
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422 | #endif |
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423 | #define END_FAST_MATH(x) do {\ |
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424 | __asm fnclex\ |
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425 | __asm fldcw word ptr [x]\ |
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426 | } while(0) |
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427 | |||
428 | #else |
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429 | #define START_FAST_MATH(x) x = 0 |
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430 | #define END_FAST_MATH(x) (void)(x) |
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431 | #endif |
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432 | |||
433 | |||
434 | #ifndef Elements |
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435 | #define Elements(x) (sizeof(x)/sizeof(*(x))) |
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436 | #endif |
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437 | |||
438 | |||
439 | |||
440 | #ifdef __cplusplus |
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441 | } |
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442 | #endif |
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443 | |||
444 | |||
445 | #endif /* COMPILER_H */><>><>'> |