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   * Sun compilers define __i386 instead of the gcc-style __i386__
  51  */
  52 #ifdef __SUNPRO_C
  53 # if !defined(__i386__) && defined(__i386)
  54 #  define __i386__
  55 # elif !defined(__amd64__) && defined(__amd64)
  56 #  define __amd64__
  57 # elif !defined(__sparc__) && defined(__sparc)
  58 #  define __sparc__
  59 # endif
  60 # if !defined(__volatile)
  61 #  define __volatile volatile
  62 # endif
  63 #endif
  64
  65
  66 /**
  67  * finite macro.
  68  */
  69 #if defined(_MSC_VER)
  70 #  define finite _finite
  71 #endif
  72
  73
  74 /**
  75  * Disable assorted warnings
  76  */
  77 #if defined(_WIN32) && !defined(__CYGWIN__)
  78 #  if !defined(__GNUC__) /* mingw environment */
  79 #    pragma warning( disable : 4068 ) /* unknown pragma */
  80 #    pragma warning( disable : 4710 ) /* function 'foo' not inlined */
  81 #    pragma warning( disable : 4711 ) /* function 'foo' selected for automatic inline expansion */
  82 #    pragma warning( disable : 4127 ) /* conditional expression is constant */
  83 #    if defined(MESA_MINWARN)
  84 #      pragma warning( disable : 4244 ) /* '=' : conversion from 'const double ' to 'float ', possible loss of data */
  85 #      pragma warning( disable : 4018 ) /* '<' : signed/unsigned mismatch */
  86 #      pragma warning( disable : 4305 ) /* '=' : truncation from 'const double ' to 'float ' */
  87 #      pragma warning( disable : 4550 ) /* 'function' undefined; assuming extern returning int */
  88 #      pragma warning( disable : 4761 ) /* integral size mismatch in argument; conversion supplied */
  89 #    endif
  90 #  endif
  91 #endif
  92
  93
  94 /**
  95  * PUBLIC/USED macros
  96  *
  97  * If we build the library with gcc's -fvisibility=hidden flag, we'll
  98  * use the PUBLIC macro to mark functions that are to be exported.
  99  *
 100  * We also need to define a USED attribute, so the optimizer doesn't
 101  * inline a static function that we later use in an alias. - ajax
 102  */
 103 #ifndef PUBLIC
 104 #  if defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
 105 #    define PUBLIC __attribute__((visibility("default")))
 106 #    define USED __attribute__((used))
 107 #  else
 108 #    define PUBLIC
 109 #    define USED
 110 #  endif
 111 #endif
 112
 113
 114 /* XXX: Use standard `__func__` instead */
 115 #ifndef __FUNCTION__
 116 #  define __FUNCTION__ __func__
 117 #endif
 118
 119 /**
 120  * Either define MESA_BIG_ENDIAN or MESA_LITTLE_ENDIAN, and CPU_TO_LE32.
 121  * Do not use these unless absolutely necessary!
 122  * Try to use a runtime test instead.
 123  * For now, only used by some DRI hardware drivers for color/texel packing.
 124  */
 125 #if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN
 126 #if defined(__linux__)
 127 #include <byteswap.h>
 128 #define CPU_TO_LE32( x )        bswap_32( x )
 129 #elif defined(__APPLE__)
 130 #include <CoreFoundation/CFByteOrder.h>
 131 #define CPU_TO_LE32( x )        CFSwapInt32HostToLittle( x )
 132 #elif (defined(_AIX))
 133 static inline GLuint CPU_TO_LE32(GLuint x)
 134 {
 135    return (((x & 0x000000ff) << 24) |
 136            ((x & 0x0000ff00) <<  8) |
 137            ((x & 0x00ff0000) >>  8) |
 138            ((x & 0xff000000) >> 24));
 139 }
 140 #elif defined(__OpenBSD__)
 141 #include <sys/types.h>
 142 #define CPU_TO_LE32( x )        htole32( x )
 143 #else /*__linux__ */
 144 #include <sys/endian.h>
 145 #define CPU_TO_LE32( x )        bswap32( x )
 146 #endif /*__linux__*/
 147 #define MESA_BIG_ENDIAN 1
 148 #else
 149 #define CPU_TO_LE32( x )        ( x )
 150 #define MESA_LITTLE_ENDIAN 1
 151 #endif
 152 #define LE32_TO_CPU( x )        CPU_TO_LE32( x )
 153
 154
 155
 156 /**
 157  * Create a macro so that asm functions can be linked into compilers other
 158  * than GNU C
 159  */
 160 #ifndef _ASMAPI
 161 #if defined(_WIN32)
 162 #define _ASMAPI __cdecl
 163 #else
 164 #define _ASMAPI
 165 #endif
 166 #ifdef  PTR_DECL_IN_FRONT
 167 #define _ASMAPIP * _ASMAPI
 168 #else
 169 #define _ASMAPIP _ASMAPI *
 170 #endif
 171 #endif
 172
 173 #ifdef USE_X86_ASM
 174 #define _NORMAPI _ASMAPI
 175 #define _NORMAPIP _ASMAPIP
 176 #else
 177 #define _NORMAPI
 178 #define _NORMAPIP *
 179 #endif
 180
 181 /**
 182  * LONGSTRING macro
 183  * gcc -pedantic warns about long string literals, LONGSTRING silences that.
 184  */
 185 #if !defined(__GNUC__)
 186 # define LONGSTRING
 187 #else
 188 # define LONGSTRING __extension__
 189 #endif
 190
 191 #define IEEE_ONE 0x3f800000
 192
 193 #ifndef Elements
 194 #define Elements(x) (sizeof(x)/sizeof(*(x)))
 195 #endif
 196
 197 #ifdef __cplusplus
 198 }
 199 #endif
 200
 201
 202 #endif /* COMPILER_H */