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 #if defined(__linux__) && defined(__i386__) 49 //#include <fpu_control.h> 50 #endif 51 #include <float.h> 52 #include <stdarg.h> 53 54 55 #ifdef __cplusplus 56 extern "C" { 57 #endif 58 59 60 /** 61 * Get standard integer types 62 */ 63 #if defined(_MSC_VER) 64 typedef __int8 int8_t; 65 typedef unsigned __int8 uint8_t; 66 typedef __int16 int16_t; 67 typedef unsigned __int16 uint16_t; 68 typedef __int32 int32_t; 69 typedef unsigned __int32 uint32_t; 70 typedef __int64 int64_t; 71 typedef unsigned __int64 uint64_t; 72 73 # if defined(_WIN64) 74 typedef __int64 intptr_t; 75 typedef unsigned __int64 uintptr_t; 76 # else 77 typedef __int32 intptr_t; 78 typedef unsigned __int32 uintptr_t; 79 # endif 80 81 # define INT64_C(__val) __val##i64 82 # define UINT64_C(__val) __val##ui64 83 #else 84 # include <stdint.h> 85 #endif 86 87 88 /** 89 * Sun compilers define __i386 instead of the gcc-style __i386__ 90 */ 91 #ifdef __SUNPRO_C 92 # if !defined(__i386__) && defined(__i386) 93 # define __i386__ 94 # elif !defined(__amd64__) && defined(__amd64) 95 # define __amd64__ 96 # elif !defined(__sparc__) && defined(__sparc) 97 # define __sparc__ 98 # endif 99 # if !defined(__volatile) 100 # define __volatile volatile 101 # endif 102 #endif 103 104 105 /** 106 * finite macro. 107 */ 108 #if defined(_MSC_VER) 109 # define finite _finite 110 #elif defined(__WATCOMC__) 111 # define finite _finite 112 #endif 113 114 115 /** 116 * Disable assorted warnings 117 */ 118 #if !defined(OPENSTEP) && (defined(__WIN32__) && !defined(__CYGWIN__)) && !defined(BUILD_FOR_SNAP) 119 # if !defined(__GNUC__) /* mingw environment */ 120 # pragma warning( disable : 4068 ) /* unknown pragma */ 121 # pragma warning( disable : 4710 ) /* function 'foo' not inlined */ 122 # pragma warning( disable : 4711 ) /* function 'foo' selected for automatic inline expansion */ 123 # pragma warning( disable : 4127 ) /* conditional expression is constant */ 124 # if defined(MESA_MINWARN) 125 # pragma warning( disable : 4244 ) /* '=' : conversion from 'const double ' to 'float ', possible loss of data */ 126 # pragma warning( disable : 4018 ) /* '<' : signed/unsigned mismatch */ 127 # pragma warning( disable : 4305 ) /* '=' : truncation from 'const double ' to 'float ' */ 128 # pragma warning( disable : 4550 ) /* 'function' undefined; assuming extern returning int */ 129 # pragma warning( disable : 4761 ) /* integral size mismatch in argument; conversion supplied */ 130 # endif 131 # endif 132 #endif 133 #if defined(__WATCOMC__) 134 # pragma disable_message(201) /* Disable unreachable code warnings */ 135 #endif 136 137 138 139 /** 140 * Function inlining 141 */ 142 #if defined(__GNUC__) 143 # define INLINE __inline__ 144 #elif defined(__MSC__) 145 # define INLINE __inline 146 #elif defined(_MSC_VER) 147 # define INLINE __inline 148 #elif defined(__ICL) 149 # define INLINE __inline 150 #elif defined(__INTEL_COMPILER) 151 # define INLINE inline 152 #elif defined(__WATCOMC__) && (__WATCOMC__ >= 1100) 153 # define INLINE __inline 154 #elif defined(__SUNPRO_C) && defined(__C99FEATURES__) 155 # define INLINE inline 156 # define __inline inline 157 # define __inline__ inline 158 #elif (__STDC_VERSION__ >= 199901L) /* C99 */ 159 # define INLINE inline 160 #else 161 # define INLINE 162 #endif 163 164 165 /** 166 * PUBLIC/USED macros 167 * 168 * If we build the library with gcc's -fvisibility=hidden flag, we'll 169 * use the PUBLIC macro to mark functions that are to be exported. 170 * 171 * We also need to define a USED attribute, so the optimizer doesn't 172 * inline a static function that we later use in an alias. - ajax 173 */ 174 #if defined(__GNUC__) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590)) 175 # define PUBLIC __attribute__((visibility("default"))) 176 # define USED __attribute__((used)) 177 #else 178 # define PUBLIC 179 # define USED 180 #endif 181 182 183 /** 184 * Some compilers don't like some of Mesa's const usage. In those places use 185 * CONST instead of const. Pass -DNO_CONST to compilers where this matters. 186 */ 187 #ifdef NO_CONST 188 # define CONST 189 #else 190 # define CONST const 191 #endif 192 193 194 /** 195 * __builtin_expect macros 196 */ 197 #if !defined(__GNUC__) 198 # define __builtin_expect(x, y) x 199 #endif 200 201 #ifdef __GNUC__ 202 #define likely(x) __builtin_expect(!!(x), 1) 203 #define unlikely(x) __builtin_expect(!!(x), 0) 204 #else 205 #define likely(x) !!(x) 206 #define unlikely(x) !!(x) 207 #endif 208 209 /** 210 * The __FUNCTION__ gcc variable is generally only used for debugging. 211 * If we're not using gcc, define __FUNCTION__ as a cpp symbol here. 212 * Don't define it if using a newer Windows compiler. 213 */ 214 #ifndef __FUNCTION__ 215 # if defined(__VMS) 216 # define __FUNCTION__ "VMS$NL:" 217 # elif !defined(__GNUC__) && !defined(__xlC__) && \ 218 (!defined(_MSC_VER) || _MSC_VER < 1300) 219 # if (__STDC_VERSION__ >= 199901L) /* C99 */ || \ 220 (defined(__SUNPRO_C) && defined(__C99FEATURES__)) 221 # define __FUNCTION__ __func__ 222 # else 223 # define __FUNCTION__ "<unknown>" 224 # endif 225 # endif 226 #endif 227 #ifndef __func__ 228 # if (__STDC_VERSION__ >= 199901L) || \ 229 (defined(__SUNPRO_C) && defined(__C99FEATURES__)) 230 /* __func__ is part of C99 */ 231 # elif defined(_MSC_VER) 232 # if _MSC_VER >= 1300 233 # define __func__ __FUNCTION__ 234 # else 235 # define __func__ "<unknown>" 236 # endif 237 # endif 238 #endif 239 240 241 /** 242 * Either define MESA_BIG_ENDIAN or MESA_LITTLE_ENDIAN, and CPU_TO_LE32. 243 * Do not use these unless absolutely necessary! 244 * Try to use a runtime test instead. 245 * For now, only used by some DRI hardware drivers for color/texel packing. 246 */ 247 #if defined(BYTE_ORDER) && defined(BIG_ENDIAN) && BYTE_ORDER == BIG_ENDIAN 248 #if defined(__linux__) 249 #include <byteswap.h> 250 #define CPU_TO_LE32( x ) bswap_32( x ) 251 #elif defined(__APPLE__) 252 #include <CoreFoundation/CFByteOrder.h> 253 #define CPU_TO_LE32( x ) CFSwapInt32HostToLittle( x ) 254 #elif (defined(_AIX) || defined(__blrts)) 255 static INLINE GLuint CPU_TO_LE32(GLuint x) 256 { 257 return (((x & 0x000000ff) << 24) | 258 ((x & 0x0000ff00) << 8) | 259 ((x & 0x00ff0000) >> 8) | 260 ((x & 0xff000000) >> 24)); 261 } 262 #else /*__linux__ */ 263 #include <sys/endian.h> 264 #define CPU_TO_LE32( x ) bswap32( x ) 265 #endif /*__linux__*/ 266 #define MESA_BIG_ENDIAN 1 267 #else 268 #define CPU_TO_LE32( x ) ( x ) 269 #define MESA_LITTLE_ENDIAN 1 270 #endif 271 #define LE32_TO_CPU( x ) CPU_TO_LE32( x ) 272 273 274 275 #if !defined(CAPI) && defined(WIN32) && !defined(BUILD_FOR_SNAP) 276 #define CAPI _cdecl 277 #endif 278 279 280 /** 281 * Create a macro so that asm functions can be linked into compilers other 282 * than GNU C 283 */ 284 #ifndef _ASMAPI 285 #if defined(WIN32) && !defined(BUILD_FOR_SNAP)/* was: !defined( __GNUC__ ) && !defined( VMS ) && !defined( __INTEL_COMPILER )*/ 286 #define _ASMAPI __cdecl 287 #else 288 #define _ASMAPI 289 #endif 290 #ifdef PTR_DECL_IN_FRONT 291 #define _ASMAPIP * _ASMAPI 292 #else 293 #define _ASMAPIP _ASMAPI * 294 #endif 295 #endif 296 297 #ifdef USE_X86_ASM 298 #define _NORMAPI _ASMAPI 299 #define _NORMAPIP _ASMAPIP 300 #else 301 #define _NORMAPI 302 #define _NORMAPIP * 303 #endif 304 305 306 /* This is a macro on IRIX */ 307 #ifdef _P 308 #undef _P 309 #endif 310 311 312 /* Turn off macro checking systems used by other libraries */ 313 #ifdef CHECK 314 #undef CHECK 315 #endif 316 317 318 /** 319 * ASSERT macro 320 */ 321 #if !defined(_WIN32_WCE) 322 #if defined(BUILD_FOR_SNAP) && defined(CHECKED) 323 # define ASSERT(X) _CHECK(X) 324 #elif defined(DEBUG) 325 # define ASSERT(X) assert(X) 326 #else 327 # define ASSERT(X) 328 #endif 329 #endif 330 331 #if (__GNUC__ >= 3) 332 #define PRINTFLIKE(f, a) __attribute__ ((format(__printf__, f, a))) 333 #else 334 #define PRINTFLIKE(f, a) 335 #endif 336 337 #ifndef NULL 338 #define NULL 0 339 #endif 340 341 342 /** 343 * LONGSTRING macro 344 * gcc -pedantic warns about long string literals, LONGSTRING silences that. 345 */ 346 #if !defined(__GNUC__) 347 # define LONGSTRING 348 #else 349 # define LONGSTRING __extension__ 350 #endif 351 352 353 #ifndef M_PI 354 #define M_PI (3.1415926536) 355 #endif 356 357 #ifndef M_E 358 #define M_E (2.7182818284590452354) 359 #endif 360 361 #ifndef M_LOG2E 362 #define M_LOG2E (1.4426950408889634074) 363 #endif 364 365 #ifndef ONE_DIV_LN2 366 #define ONE_DIV_LN2 (1.442695040888963456) 367 #endif 368 369 #ifndef ONE_DIV_SQRT_LN2 370 #define ONE_DIV_SQRT_LN2 (1.201122408786449815) 371 #endif 372 373 #ifndef FLT_MAX_EXP 374 #define FLT_MAX_EXP 128 375 #endif 376 377 378 /** 379 * USE_IEEE: Determine if we're using IEEE floating point 380 */ 381 #if defined(__i386__) || defined(__386__) || defined(__sparc__) || \ 382 defined(__s390x__) || defined(__powerpc__) || \ 383 defined(__x86_64__) || \ 384 defined(ia64) || defined(__ia64__) || \ 385 defined(__hppa__) || defined(hpux) || \ 386 defined(__mips) || defined(_MIPS_ARCH) || \ 387 defined(__arm__) || \ 388 defined(__sh__) || defined(__m32r__) || \ 389 (defined(__sun) && defined(_IEEE_754)) || \ 390 (defined(__alpha__) && (defined(__IEEE_FLOAT) || !defined(VMS))) 391 #define USE_IEEE 392 #define IEEE_ONE 0x3f800000 393 #endif 394 395 396 /** 397 * START/END_FAST_MATH macros: 398 * 399 * START_FAST_MATH: Set x86 FPU to faster, 32-bit precision mode (and save 400 * original mode to a temporary). 401 * END_FAST_MATH: Restore x86 FPU to original mode. 402 */ 403 #if defined(__GNUC__) && defined(__i386__) 404 /* 405 * Set the x86 FPU control word to guarentee only 32 bits of precision 406 * are stored in registers. Allowing the FPU to store more introduces 407 * differences between situations where numbers are pulled out of memory 408 * vs. situations where the compiler is able to optimize register usage. 409 * 410 * In the worst case, we force the compiler to use a memory access to 411 * truncate the float, by specifying the 'volatile' keyword. 412 */ 413 /* Hardware default: All exceptions masked, extended double precision, 414 * round to nearest (IEEE compliant): 415 */ 416 #define DEFAULT_X86_FPU 0x037f 417 /* All exceptions masked, single precision, round to nearest: 418 */ 419 #define FAST_X86_FPU 0x003f 420 /* The fldcw instruction will cause any pending FP exceptions to be 421 * raised prior to entering the block, and we clear any pending 422 * exceptions before exiting the block. Hence, asm code has free 423 * reign over the FPU while in the fast math block. 424 */ 425 #if defined(NO_FAST_MATH) 426 #define START_FAST_MATH(x) \ 427 do { \ 428 static GLuint mask = DEFAULT_X86_FPU; \ 429 __asm__ ( "fnstcw %0" : "=m" (*&(x)) ); \ 430 __asm__ ( "fldcw %0" : : "m" (mask) ); \ 431 } while (0) 432 #else 433 #define START_FAST_MATH(x) \ 434 do { \ 435 static GLuint mask = FAST_X86_FPU; \ 436 __asm__ ( "fnstcw %0" : "=m" (*&(x)) ); \ 437 __asm__ ( "fldcw %0" : : "m" (mask) ); \ 438 } while (0) 439 #endif 440 /* Restore original FPU mode, and clear any exceptions that may have 441 * occurred in the FAST_MATH block. 442 */ 443 #define END_FAST_MATH(x) \ 444 do { \ 445 __asm__ ( "fnclex ; fldcw %0" : : "m" (*&(x)) ); \ 446 } while (0) 447 448 #elif defined(__WATCOMC__) && defined(__386__) 449 #define DEFAULT_X86_FPU 0x037f /* See GCC comments above */ 450 #define FAST_X86_FPU 0x003f /* See GCC comments above */ 451 void _watcom_start_fast_math(unsigned short *x,unsigned short *mask); 452 #pragma aux _watcom_start_fast_math = \ 453 "fnstcw word ptr [eax]" \ 454 "fldcw word ptr [ecx]" \ 455 parm [eax] [ecx] \ 456 modify exact []; 457 void _watcom_end_fast_math(unsigned short *x); 458 #pragma aux _watcom_end_fast_math = \ 459 "fnclex" \ 460 "fldcw word ptr [eax]" \ 461 parm [eax] \ 462 modify exact []; 463 #if defined(NO_FAST_MATH) 464 #define START_FAST_MATH(x) \ 465 do { \ 466 static GLushort mask = DEFAULT_X86_FPU; \ 467 _watcom_start_fast_math(&x,&mask); \ 468 } while (0) 469 #else 470 #define START_FAST_MATH(x) \ 471 do { \ 472 static GLushort mask = FAST_X86_FPU; \ 473 _watcom_start_fast_math(&x,&mask); \ 474 } while (0) 475 #endif 476 #define END_FAST_MATH(x) _watcom_end_fast_math(&x) 477 478 #elif defined(_MSC_VER) && defined(_M_IX86) 479 #define DEFAULT_X86_FPU 0x037f /* See GCC comments above */ 480 #define FAST_X86_FPU 0x003f /* See GCC comments above */ 481 #if defined(NO_FAST_MATH) 482 #define START_FAST_MATH(x) do {\ 483 static GLuint mask = DEFAULT_X86_FPU;\ 484 __asm fnstcw word ptr [x]\ 485 __asm fldcw word ptr [mask]\ 486 } while(0) 487 #else 488 #define START_FAST_MATH(x) do {\ 489 static GLuint mask = FAST_X86_FPU;\ 490 __asm fnstcw word ptr [x]\ 491 __asm fldcw word ptr [mask]\ 492 } while(0) 493 #endif 494 #define END_FAST_MATH(x) do {\ 495 __asm fnclex\ 496 __asm fldcw word ptr [x]\ 497 } while(0) 498 499 #else 500 #define START_FAST_MATH(x) x = 0 501 #define END_FAST_MATH(x) (void)(x) 502 #endif 503 504 505 #ifndef Elements 506 #define Elements(x) (sizeof(x)/sizeof(*(x))) 507 #endif 508 509 510 511 #ifdef __cplusplus 512 } 513 #endif 514 515 516 #endif /* COMPILER_H */ 517
