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| Rev | Author | Line No. | Line |
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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 */ |