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 #include <math.h>
  39 #include <limits.h>
  40 #include <stdlib.h>
  41 #include <stdio.h>
  42 #include <string.h>
  43 #include <float.h>
  44
  45 #include "util/macros.h"
  46
  47 #include "c99_compat.h" /* inline, __func__, etc. */
  48
  49
  50 #ifdef __cplusplus
  51 extern "C" {
  52 #endif
  53
  54
  55 /**
  56  * Get standard integer types
  57  */
  58 #include <stdint.h>
  59
  60
  61 /**
  62   * Sun compilers define __i386 instead of the gcc-style __i386__
  63  */
  64 #ifdef __SUNPRO_C
  65 # if !defined(__i386__) && defined(__i386)
  66 #  define __i386__
  67 # elif !defined(__amd64__) && defined(__amd64)
  68 #  define __amd64__
  69 # elif !defined(__sparc__) && defined(__sparc)
  70 #  define __sparc__
  71 # endif
  72 # if !defined(__volatile)
  73 #  define __volatile volatile
  74 # endif
  75 #endif
  76
  77
  78 /**
  79  * finite macro.
  80  */
  81 #if defined(_MSC_VER)
  82 #  define finite _finite
  83 #endif
  84
  85
  86 /**
  87  * Disable assorted warnings
  88  */
  89 #if defined(_WIN32) && !defined(__CYGWIN__)
  90 #  if !defined(__GNUC__) /* mingw environment */
  91 #    pragma warning( disable : 4068 ) /* unknown pragma */
  92 #    pragma warning( disable : 4710 ) /* function 'foo' not inlined */
  93 #    pragma warning( disable : 4711 ) /* function 'foo' selected for automatic inline expansion */
  94 #    pragma warning( disable : 4127 ) /* conditional expression is constant */
  95 #    if defined(MESA_MINWARN)
  96 #      pragma warning( disable : 4244 ) /* '=' : conversion from 'const double ' to 'float ', possible loss of data */
  97 #      pragma warning( disable : 4018 ) /* '<' : signed/unsigned mismatch */
  98 #      pragma warning( disable : 4305 ) /* '=' : truncation from 'const double ' to 'float ' */
  99 #      pragma warning( disable : 4550 ) /* 'function' undefined; assuming extern returning int */
 100 #      pragma warning( disable : 4761 ) /* integral size mismatch in argument; conversion supplied */
 101 #    endif
 102 #  endif
 103 #endif
 104
 105
 106
 107 /* XXX: Use standard `inline` keyword instead */
 108 #ifndef INLINE
 109 #  define INLINE inline
 110 #endif
 111
 112
 113 /**
 114  * PUBLIC/USED macros
 115  *
 116  * If we build the library with gcc's -fvisibility=hidden flag, we'll
 117  * use the PUBLIC macro to mark functions that are to be exported.
 118  *
 119  * We also need to define a USED attribute, so the optimizer doesn't
 120  * inline a static function that we later use in an alias. - ajax
 121  */
 122 #ifndef PUBLIC
 123 #  if defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
 124 #    define PUBLIC __attribute__((visibility("default")))
 125 #    define USED __attribute__((used))
 126 #  else
 127 #    define PUBLIC
 128 #    define USED
 129 #  endif
 130 #endif
 131
 132
 133 /* XXX: Use standard `__func__` instead */
 134 #ifndef __FUNCTION__
 135 #  define __FUNCTION__ __func__
 136 #endif
 137
 138 /**
 139  * Either define MESA_BIG_ENDIAN or MESA_LITTLE_ENDIAN, and CPU_TO_LE32.
 140  * Do not use these unless absolutely necessary!
 141  * Try to use a runtime test instead.
 142  * For now, only used by some DRI hardware drivers for color/texel packing.
 143  */
 144 #if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN
 145 #if defined(__linux__)
 146 #include <byteswap.h>
 147 #define CPU_TO_LE32( x )        bswap_32( x )
 148 #elif defined(__APPLE__)
 149 #include <CoreFoundation/CFByteOrder.h>
 150 #define CPU_TO_LE32( x )        CFSwapInt32HostToLittle( x )
 151 #elif (defined(_AIX))
 152 static inline GLuint CPU_TO_LE32(GLuint x)
 153 {
 154    return (((x & 0x000000ff) << 24) |
 155            ((x & 0x0000ff00) <<  8) |
 156            ((x & 0x00ff0000) >>  8) |
 157            ((x & 0xff000000) >> 24));
 158 }
 159 #elif defined(__OpenBSD__)
 160 #include <sys/types.h>
 161 #define CPU_TO_LE32( x )        htole32( x )
 162 #else /*__linux__ */
 163 #include <sys/endian.h>
 164 #define CPU_TO_LE32( x )        bswap32( x )
 165 #endif /*__linux__*/
 166 #define MESA_BIG_ENDIAN 1
 167 #else
 168 #define CPU_TO_LE32( x )        ( x )
 169 #define MESA_LITTLE_ENDIAN 1
 170 #endif
 171 #define LE32_TO_CPU( x )        CPU_TO_LE32( x )
 172
 173
 174
 175 /**
 176  * Create a macro so that asm functions can be linked into compilers other
 177  * than GNU C
 178  */
 179 #ifndef _ASMAPI
 180 #if defined(_WIN32)
 181 #define _ASMAPI __cdecl
 182 #else
 183 #define _ASMAPI
 184 #endif
 185 #ifdef  PTR_DECL_IN_FRONT
 186 #define _ASMAPIP * _ASMAPI
 187 #else
 188 #define _ASMAPIP _ASMAPI *
 189 #endif
 190 #endif
 191
 192 #ifdef USE_X86_ASM
 193 #define _NORMAPI _ASMAPI
 194 #define _NORMAPIP _ASMAPIP
 195 #else
 196 #define _NORMAPI
 197 #define _NORMAPIP *
 198 #endif
 199
 200
 201 /*
 202  * A trick to suppress uninitialized variable warning without generating any
 203  * code
 204  */
 205 #define uninitialized_var(x) x = x
 206
 207
 208 /**
 209  * LONGSTRING macro
 210  * gcc -pedantic warns about long string literals, LONGSTRING silences that.
 211  */
 212 #if !defined(__GNUC__)
 213 # define LONGSTRING
 214 #else
 215 # define LONGSTRING __extension__
 216 #endif
 217
 218 #ifndef ONE_DIV_SQRT_LN2
 219 #define ONE_DIV_SQRT_LN2 (1.201122408786449815)
 220 #endif
 221
 222 #ifndef FLT_MAX_EXP
 223 #define FLT_MAX_EXP 128
 224 #endif
 225
 226 #define IEEE_ONE 0x3f800000
 227
 228 #ifndef Elements
 229 #define Elements(x) (sizeof(x)/sizeof(*(x)))
 230 #endif
 231
 232 #ifdef __cplusplus
 233 }
 234 #endif
 235
 236
 237 #endif /* COMPILER_H */