1/* 2 * Mesa 3-D graphics library 3 * Version: 7.5 4 * 5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. 6 * Copyright (C) 2009 VMware, Inc. All Rights Reserved. 7 * 8 * Permission is hereby granted, free of charge, to any person obtaining a 9 * copy of this software and associated documentation files (the "Software"), 10 * to deal in the Software without restriction, including without limitation 11 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 12 * and/or sell copies of the Software, and to permit persons to whom the 13 * Software is furnished to do so, subject to the following conditions: 14 * 15 * The above copyright notice and this permission notice shall be included 16 * in all copies or substantial portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 23 * CONNECTION WITH THE SOFTWARE OR THE USE OR 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 <ctype.h> 39#if defined(__alpha__) && defined(CCPML) 40#include <cpml.h> /* use Compaq's Fast Math Library on Alpha */ 41#else 42#include <math.h> 43#endif 44#include <limits.h> 45#include <stdlib.h> 46#include <stdio.h> 47#include <string.h> 48#include <float.h> 49#include <stdarg.h> 50 51 52#ifdef __cplusplus 53extern "C" { 54#endif 55 56 57/** 58 * Get standard integer types 59 */ 60#include <stdint.h> 61 62 63/** 64 * Sun compilers define __i386 instead of the gcc-style __i386__ 65 */ 66#ifdef __SUNPRO_C 67# if !defined(__i386__) && defined(__i386) 68# define __i386__ 69# elif !defined(__amd64__) && defined(__amd64) 70# define __amd64__ 71# elif !defined(__sparc__) && defined(__sparc) 72# define __sparc__ 73# endif 74# if !defined(__volatile) 75# define __volatile volatile 76# endif 77#endif 78 79 80/** 81 * finite macro. 82 */ 83#if defined(_MSC_VER) 84# define finite _finite 85#elif defined(__WATCOMC__) 86# define finite _finite 87#endif 88 89 90/** 91 * Disable assorted warnings 92 */ 93#if !defined(OPENSTEP) && (defined(__WIN32__) && !defined(__CYGWIN__)) && !defined(BUILD_FOR_SNAP) 94# if !defined(__GNUC__) /* mingw environment */ 95# pragma warning( disable : 4068 ) /* unknown pragma */ 96# pragma warning( disable : 4710 ) /* function 'foo' not inlined */ 97# pragma warning( disable : 4711 ) /* function 'foo' selected for automatic inline expansion */ 98# pragma warning( disable : 4127 ) /* conditional expression is constant */ 99# if defined(MESA_MINWARN) 100# pragma warning( disable : 4244 ) /* '=' : conversion from 'const double ' to 'float ', possible loss of data */ 101# pragma warning( disable : 4018 ) /* '<' : signed/unsigned mismatch */ 102# pragma warning( disable : 4305 ) /* '=' : truncation from 'const double ' to 'float ' */ 103# pragma warning( disable : 4550 ) /* 'function' undefined; assuming extern returning int */ 104# pragma warning( disable : 4761 ) /* integral size mismatch in argument; conversion supplied */ 105# endif 106# endif 107#endif 108#if defined(__WATCOMC__) 109# pragma disable_message(201) /* Disable unreachable code warnings */ 110#endif 111 112 113 114/** 115 * Function inlining 116 */ 117#ifndef inline 118# ifdef __cplusplus 119 /* C++ supports inline keyword */ 120# elif defined(__GNUC__) 121# define inline __inline__ 122# elif defined(_MSC_VER) 123# define inline __inline 124# elif defined(__ICL) 125# define inline __inline 126# elif defined(__INTEL_COMPILER) 127 /* Intel compiler supports inline keyword */ 128# elif defined(__WATCOMC__) && (__WATCOMC__ >= 1100) 129# define inline __inline 130# elif defined(__SUNPRO_C) && defined(__C99FEATURES__) 131 /* C99 supports inline keyword */ 132# elif (__STDC_VERSION__ >= 199901L) 133 /* C99 supports inline keyword */ 134# else 135# define inline 136# endif 137#endif 138#ifndef INLINE 139# define INLINE inline 140#endif 141 142 143/** 144 * PUBLIC/USED macros 145 * 146 * If we build the library with gcc's -fvisibility=hidden flag, we'll 147 * use the PUBLIC macro to mark functions that are to be exported. 148 * 149 * We also need to define a USED attribute, so the optimizer doesn't 150 * inline a static function that we later use in an alias. - ajax 151 */ 152#ifndef PUBLIC 153# if (defined(__GNUC__) && __GNUC__ >= 4) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590)) 154# define PUBLIC __attribute__((visibility("default"))) 155# define USED __attribute__((used)) 156# else 157# define PUBLIC 158# define USED 159# endif 160#endif 161 162 163/** 164 * Some compilers don't like some of Mesa's const usage. In those places use 165 * CONST instead of const. Pass -DNO_CONST to compilers where this matters. 166 */ 167#ifdef NO_CONST 168# define CONST 169#else 170# define CONST const 171#endif 172 173 174/** 175 * __builtin_expect macros 176 */ 177#if !defined(__GNUC__) 178# define __builtin_expect(x, y) (x) 179#endif 180 181#ifndef likely 182# ifdef __GNUC__ 183# define likely(x) __builtin_expect(!!(x), 1) 184# define unlikely(x) __builtin_expect(!!(x), 0) 185# else 186# define likely(x) (x) 187# define unlikely(x) (x) 188# endif 189#endif 190 191/** 192 * The __FUNCTION__ gcc variable is generally only used for debugging. 193 * If we're not using gcc, define __FUNCTION__ as a cpp symbol here. 194 * Don't define it if using a newer Windows compiler. 195 */ 196#ifndef __FUNCTION__ 197# if defined(__VMS) 198# define __FUNCTION__ "VMS$NL:" 199# elif !defined(__GNUC__) && !defined(__xlC__) && \ 200 (!defined(_MSC_VER) || _MSC_VER < 1300) 201# if (__STDC_VERSION__ >= 199901L) /* C99 */ || \ 202 (defined(__SUNPRO_C) && defined(__C99FEATURES__)) 203# define __FUNCTION__ __func__ 204# else 205# define __FUNCTION__ "<unknown>" 206# endif 207# endif 208#endif 209#ifndef __func__ 210# if (__STDC_VERSION__ >= 199901L) || \ 211 (defined(__SUNPRO_C) && defined(__C99FEATURES__)) 212 /* __func__ is part of C99 */ 213# elif defined(_MSC_VER) 214# if _MSC_VER >= 1300 215# define __func__ __FUNCTION__ 216# else 217# define __func__ "<unknown>" 218# endif 219# endif 220#endif 221 222 223/** 224 * Either define MESA_BIG_ENDIAN or MESA_LITTLE_ENDIAN, and CPU_TO_LE32. 225 * Do not use these unless absolutely necessary! 226 * Try to use a runtime test instead. 227 * For now, only used by some DRI hardware drivers for color/texel packing. 228 */ 229#if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN 230#if defined(__linux__) 231#include <byteswap.h> 232#define CPU_TO_LE32( x ) bswap_32( x ) 233#elif defined(__APPLE__) 234#include <CoreFoundation/CFByteOrder.h> 235#define CPU_TO_LE32( x ) CFSwapInt32HostToLittle( x ) 236#elif (defined(_AIX) || defined(__blrts)) 237static INLINE GLuint CPU_TO_LE32(GLuint x) 238{ 239 return (((x & 0x000000ff) << 24) | 240 ((x & 0x0000ff00) << 8) | 241 ((x & 0x00ff0000) >> 8) | 242 ((x & 0xff000000) >> 24)); 243} 244#elif defined(__OpenBSD__) 245#include <sys/types.h> 246#define CPU_TO_LE32( x ) htole32( x ) 247#else /*__linux__ */ 248#include <sys/endian.h> 249#define CPU_TO_LE32( x ) bswap32( x ) 250#endif /*__linux__*/ 251#define MESA_BIG_ENDIAN 1 252#else 253#define CPU_TO_LE32( x ) ( x ) 254#define MESA_LITTLE_ENDIAN 1 255#endif 256#define LE32_TO_CPU( x ) CPU_TO_LE32( x ) 257 258 259 260#if !defined(CAPI) && defined(WIN32) && !defined(BUILD_FOR_SNAP) 261#define CAPI _cdecl 262#endif 263 264 265/** 266 * Create a macro so that asm functions can be linked into compilers other 267 * than GNU C 268 */ 269#ifndef _ASMAPI 270#if defined(WIN32) && !defined(BUILD_FOR_SNAP)/* was: !defined( __GNUC__ ) && !defined( VMS ) && !defined( __INTEL_COMPILER )*/ 271#define _ASMAPI __cdecl 272#else 273#define _ASMAPI 274#endif 275#ifdef PTR_DECL_IN_FRONT 276#define _ASMAPIP * _ASMAPI 277#else 278#define _ASMAPIP _ASMAPI * 279#endif 280#endif 281 282#ifdef USE_X86_ASM 283#define _NORMAPI _ASMAPI 284#define _NORMAPIP _ASMAPIP 285#else 286#define _NORMAPI 287#define _NORMAPIP * 288#endif 289 290 291/* Turn off macro checking systems used by other libraries */ 292#ifdef CHECK 293#undef CHECK 294#endif 295 296 297/** 298 * ASSERT macro 299 */ 300#if !defined(_WIN32_WCE) 301#if defined(BUILD_FOR_SNAP) && defined(CHECKED) 302# define ASSERT(X) _CHECK(X) 303#elif defined(DEBUG) 304# define ASSERT(X) assert(X) 305#else 306# define ASSERT(X) 307#endif 308#endif 309 310 311/** 312 * Static (compile-time) assertion. 313 * Basically, use COND to dimension an array. If COND is false/zero the 314 * array size will be -1 and we'll get a compilation error. 315 */ 316#define STATIC_ASSERT(COND) \ 317 do { \ 318 typedef int static_assertion_failed[(!!(COND))*2-1]; \ 319 } while (0) 320 321 322#if (__GNUC__ >= 3) 323#define PRINTFLIKE(f, a) __attribute__ ((format(__printf__, f, a))) 324#else 325#define PRINTFLIKE(f, a) 326#endif 327 328#ifndef NULL 329#define NULL 0 330#endif 331 332 333/** 334 * LONGSTRING macro 335 * gcc -pedantic warns about long string literals, LONGSTRING silences that. 336 */ 337#if !defined(__GNUC__) 338# define LONGSTRING 339#else 340# define LONGSTRING __extension__ 341#endif 342 343 344#ifndef M_PI 345#define M_PI (3.14159265358979323846) 346#endif 347 348#ifndef M_E 349#define M_E (2.7182818284590452354) 350#endif 351 352#ifndef M_LOG2E 353#define M_LOG2E (1.4426950408889634074) 354#endif 355 356#ifndef ONE_DIV_SQRT_LN2 357#define ONE_DIV_SQRT_LN2 (1.201122408786449815) 358#endif 359 360#ifndef FLT_MAX_EXP 361#define FLT_MAX_EXP 128 362#endif 363 364 365/** 366 * USE_IEEE: Determine if we're using IEEE floating point 367 */ 368#if defined(__i386__) || defined(__386__) || defined(__sparc__) || \ 369 defined(__s390x__) || defined(__powerpc__) || \ 370 defined(__x86_64__) || \ 371 defined(ia64) || defined(__ia64__) || \ 372 defined(__hppa__) || defined(hpux) || \ 373 defined(__mips) || defined(_MIPS_ARCH) || \ 374 defined(__arm__) || \ 375 defined(__sh__) || defined(__m32r__) || \ 376 (defined(__sun) && defined(_IEEE_754)) || \ 377 (defined(__alpha__) && (defined(__IEEE_FLOAT) || !defined(VMS))) 378#define USE_IEEE 379#define IEEE_ONE 0x3f800000 380#endif 381 382 383/** 384 * START/END_FAST_MATH macros: 385 * 386 * START_FAST_MATH: Set x86 FPU to faster, 32-bit precision mode (and save 387 * original mode to a temporary). 388 * END_FAST_MATH: Restore x86 FPU to original mode. 389 */ 390#if defined(__GNUC__) && defined(__i386__) 391/* 392 * Set the x86 FPU control word to guarentee only 32 bits of precision 393 * are stored in registers. Allowing the FPU to store more introduces 394 * differences between situations where numbers are pulled out of memory 395 * vs. situations where the compiler is able to optimize register usage. 396 * 397 * In the worst case, we force the compiler to use a memory access to 398 * truncate the float, by specifying the 'volatile' keyword. 399 */ 400/* Hardware default: All exceptions masked, extended double precision, 401 * round to nearest (IEEE compliant): 402 */ 403#define DEFAULT_X86_FPU 0x037f 404/* All exceptions masked, single precision, round to nearest: 405 */ 406#define FAST_X86_FPU 0x003f 407/* The fldcw instruction will cause any pending FP exceptions to be 408 * raised prior to entering the block, and we clear any pending 409 * exceptions before exiting the block. Hence, asm code has free 410 * reign over the FPU while in the fast math block. 411 */ 412#if defined(NO_FAST_MATH) 413#define START_FAST_MATH(x) \ 414do { \ 415 static GLuint mask = DEFAULT_X86_FPU; \ 416 __asm__ ( "fnstcw %0" : "=m" (*&(x)) ); \ 417 __asm__ ( "fldcw %0" : : "m" (mask) ); \ 418} while (0) 419#else 420#define START_FAST_MATH(x) \ 421do { \ 422 static GLuint mask = FAST_X86_FPU; \ 423 __asm__ ( "fnstcw %0" : "=m" (*&(x)) ); \ 424 __asm__ ( "fldcw %0" : : "m" (mask) ); \ 425} while (0) 426#endif 427/* Restore original FPU mode, and clear any exceptions that may have 428 * occurred in the FAST_MATH block. 429 */ 430#define END_FAST_MATH(x) \ 431do { \ 432 __asm__ ( "fnclex ; fldcw %0" : : "m" (*&(x)) ); \ 433} while (0) 434 435#elif defined(__WATCOMC__) && defined(__386__) 436#define DEFAULT_X86_FPU 0x037f /* See GCC comments above */ 437#define FAST_X86_FPU 0x003f /* See GCC comments above */ 438void _watcom_start_fast_math(unsigned short *x,unsigned short *mask); 439#pragma aux _watcom_start_fast_math = \ 440 "fnstcw word ptr [eax]" \ 441 "fldcw word ptr [ecx]" \ 442 parm [eax] [ecx] \ 443 modify exact []; 444void _watcom_end_fast_math(unsigned short *x); 445#pragma aux _watcom_end_fast_math = \ 446 "fnclex" \ 447 "fldcw word ptr [eax]" \ 448 parm [eax] \ 449 modify exact []; 450#if defined(NO_FAST_MATH) 451#define START_FAST_MATH(x) \ 452do { \ 453 static GLushort mask = DEFAULT_X86_FPU; \ 454 _watcom_start_fast_math(&x,&mask); \ 455} while (0) 456#else 457#define START_FAST_MATH(x) \ 458do { \ 459 static GLushort mask = FAST_X86_FPU; \ 460 _watcom_start_fast_math(&x,&mask); \ 461} while (0) 462#endif 463#define END_FAST_MATH(x) _watcom_end_fast_math(&x) 464 465#elif defined(_MSC_VER) && defined(_M_IX86) 466#define DEFAULT_X86_FPU 0x037f /* See GCC comments above */ 467#define FAST_X86_FPU 0x003f /* See GCC comments above */ 468#if defined(NO_FAST_MATH) 469#define START_FAST_MATH(x) do {\ 470 static GLuint mask = DEFAULT_X86_FPU;\ 471 __asm fnstcw word ptr [x]\ 472 __asm fldcw word ptr [mask]\ 473} while(0) 474#else 475#define START_FAST_MATH(x) do {\ 476 static GLuint mask = FAST_X86_FPU;\ 477 __asm fnstcw word ptr [x]\ 478 __asm fldcw word ptr [mask]\ 479} while(0) 480#endif 481#define END_FAST_MATH(x) do {\ 482 __asm fnclex\ 483 __asm fldcw word ptr [x]\ 484} while(0) 485 486#else 487#define START_FAST_MATH(x) x = 0 488#define END_FAST_MATH(x) (void)(x) 489#endif 490 491 492#ifndef Elements 493#define Elements(x) (sizeof(x)/sizeof(*(x))) 494#endif 495 496 497 498#ifdef __cplusplus 499} 500#endif 501 502 503#endif /* COMPILER_H */ 504