src/mesa/main/compiler.h

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 /**
  28  * \file compiler.h
  29  * Compiler-related stuff.
  30  */
  31
  32
  33 #ifndef COMPILER_H
  34 #define COMPILER_H
  35
  36
  37 #include <assert.h>
  38
  39 #include "util/macros.h"
  40
  41 #include "c99_compat.h" /* inline, __func__, etc. */
  42
  43
  44 #ifdef __cplusplus
  45 extern "C" {
  46 #endif
  47
  48
  49 /**
  50  * Get standard integer types
  51  */
  52 #include <stdint.h>
  53
  54
  55 /**
  56   * Sun compilers define __i386 instead of the gcc-style __i386__
  57  */
  58 #ifdef __SUNPRO_C
  59 # if !defined(__i386__) && defined(__i386)
  60 #  define __i386__
  61 # elif !defined(__amd64__) && defined(__amd64)
  62 #  define __amd64__
  63 # elif !defined(__sparc__) && defined(__sparc)
  64 #  define __sparc__
  65 # endif
  66 # if !defined(__volatile)
  67 #  define __volatile volatile
  68 # endif
  69 #endif
  70
  71
  72 /**
  73  * finite macro.
  74  */
  75 #if defined(_MSC_VER)
  76 #  define finite _finite
  77 #endif
  78
  79
  80 /**
  81  * Disable assorted warnings
  82  */
  83 #if defined(_WIN32) && !defined(__CYGWIN__)
  84 #  if !defined(__GNUC__) /* mingw environment */
  85 #    pragma warning( disable : 4068 ) /* unknown pragma */
  86 #    pragma warning( disable : 4710 ) /* function 'foo' not inlined */
  87 #    pragma warning( disable : 4711 ) /* function 'foo' selected for automatic inline expansion */
  88 #    pragma warning( disable : 4127 ) /* conditional expression is constant */
  89 #    if defined(MESA_MINWARN)
  90 #      pragma warning( disable : 4244 ) /* '=' : conversion from 'const double ' to 'float ', possible loss of data */
  91 #      pragma warning( disable : 4018 ) /* '<' : signed/unsigned mismatch */
  92 #      pragma warning( disable : 4305 ) /* '=' : truncation from 'const double ' to 'float ' */
  93 #      pragma warning( disable : 4550 ) /* 'function' undefined; assuming extern returning int */
  94 #      pragma warning( disable : 4761 ) /* integral size mismatch in argument; conversion supplied */
  95 #    endif
  96 #  endif
  97 #endif
  98
  99
 100
 101 /* XXX: Use standard `inline` keyword instead */
 102 #ifndef INLINE
 103 #  define INLINE inline
 104 #endif
 105
 106
 107 /**
 108  * PUBLIC/USED macros
 109  *
 110  * If we build the library with gcc's -fvisibility=hidden flag, we'll
 111  * use the PUBLIC macro to mark functions that are to be exported.
 112  *
 113  * We also need to define a USED attribute, so the optimizer doesn't
 114  * inline a static function that we later use in an alias. - ajax
 115  */
 116 #ifndef PUBLIC
 117 #  if defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
 118 #    define PUBLIC __attribute__((visibility("default")))
 119 #    define USED __attribute__((used))
 120 #  else
 121 #    define PUBLIC
 122 #    define USED
 123 #  endif
 124 #endif
 125
 126
 127 /* XXX: Use standard `__func__` instead */
 128 #ifndef __FUNCTION__
 129 #  define __FUNCTION__ __func__
 130 #endif
 131
 132 /**
 133  * Either define MESA_BIG_ENDIAN or MESA_LITTLE_ENDIAN, and CPU_TO_LE32.
 134  * Do not use these unless absolutely necessary!
 135  * Try to use a runtime test instead.
 136  * For now, only used by some DRI hardware drivers for color/texel packing.
 137  */
 138 #if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN
 139 #if defined(__linux__)
 140 #include <byteswap.h>
 141 #define CPU_TO_LE32( x )        bswap_32( x )
 142 #elif defined(__APPLE__)
 143 #include <CoreFoundation/CFByteOrder.h>
 144 #define CPU_TO_LE32( x )        CFSwapInt32HostToLittle( x )
 145 #elif (defined(_AIX))
 146 static inline GLuint CPU_TO_LE32(GLuint x)
 147 {
 148    return (((x & 0x000000ff) << 24) |
 149            ((x & 0x0000ff00) <<  8) |
 150            ((x & 0x00ff0000) >>  8) |
 151            ((x & 0xff000000) >> 24));
 152 }
 153 #elif defined(__OpenBSD__)
 154 #include <sys/types.h>
 155 #define CPU_TO_LE32( x )        htole32( x )
 156 #else /*__linux__ */
 157 #include <sys/endian.h>
 158 #define CPU_TO_LE32( x )        bswap32( x )
 159 #endif /*__linux__*/
 160 #define MESA_BIG_ENDIAN 1
 161 #else
 162 #define CPU_TO_LE32( x )        ( x )
 163 #define MESA_LITTLE_ENDIAN 1
 164 #endif
 165 #define LE32_TO_CPU( x )        CPU_TO_LE32( x )
 166
 167
 168
 169 /**
 170  * Create a macro so that asm functions can be linked into compilers other
 171  * than GNU C
 172  */
 173 #ifndef _ASMAPI
 174 #if defined(_WIN32)
 175 #define _ASMAPI __cdecl
 176 #else
 177 #define _ASMAPI
 178 #endif
 179 #ifdef  PTR_DECL_IN_FRONT
 180 #define _ASMAPIP * _ASMAPI
 181 #else
 182 #define _ASMAPIP _ASMAPI *
 183 #endif
 184 #endif
 185
 186 #ifdef USE_X86_ASM
 187 #define _NORMAPI _ASMAPI
 188 #define _NORMAPIP _ASMAPIP
 189 #else
 190 #define _NORMAPI
 191 #define _NORMAPIP *
 192 #endif
 193
 194
 195 /*
 196  * A trick to suppress uninitialized variable warning without generating any
 197  * code
 198  */
 199 #define uninitialized_var(x) x = x
 200
 201
 202 /**
 203  * LONGSTRING macro
 204  * gcc -pedantic warns about long string literals, LONGSTRING silences that.
 205  */
 206 #if !defined(__GNUC__)
 207 # define LONGSTRING
 208 #else
 209 # define LONGSTRING __extension__
 210 #endif
 211
 212 #ifndef ONE_DIV_SQRT_LN2
 213 #define ONE_DIV_SQRT_LN2 (1.201122408786449815)
 214 #endif
 215
 216 #ifndef FLT_MAX_EXP
 217 #define FLT_MAX_EXP 128
 218 #endif
 219
 220 #define IEEE_ONE 0x3f800000
 221
 222 #ifndef Elements
 223 #define Elements(x) (sizeof(x)/sizeof(*(x)))
 224 #endif
 225
 226 #ifdef __cplusplus
 227 }
 228 #endif
 229
 230
 231 #endif /* COMPILER_H */