src/mesa/main/imports.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5.2
   4  *
   5  * Copyright (C) 1999-2006  Brian Paul   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  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 /**
  27  * \file imports.h
  28  * Standard C library function wrappers.
  29  *
  30  * This file provides wrappers for all the standard C library functions
  31  * like malloc(), free(), printf(), getenv(), etc.
  32  */
  33
  34
  35 #ifndef IMPORTS_H
  36 #define IMPORTS_H
  37
  38
  39 /* XXX some of the stuff in glheader.h should be moved into this file.
  40  */
  41 #include "glheader.h"
  42 #include <GL/internal/glcore.h>
  43
  44
  45 #ifdef __cplusplus
  46 extern "C" {
  47 #endif
  48
  49
  50 /**********************************************************************/
  51 /** \name General macros */
  52 /*@{*/
  53
  54 #ifndef NULL
  55 #define NULL 0
  56 #endif
  57
  58 /*@}*/
  59
  60
  61 /**********************************************************************/
  62 /** Memory macros */
  63 /*@{*/
  64
  65 /** Allocate \p BYTES bytes */
  66 #define MALLOC(BYTES)      _mesa_malloc(BYTES)
  67 /** Allocate and zero \p BYTES bytes */
  68 #define CALLOC(BYTES)      _mesa_calloc(BYTES)
  69 /** Allocate a structure of type \p T */
  70 #define MALLOC_STRUCT(T)   (struct T *) _mesa_malloc(sizeof(struct T))
  71 /** Allocate and zero a structure of type \p T */
  72 #define CALLOC_STRUCT(T)   (struct T *) _mesa_calloc(sizeof(struct T))
  73 /** Free memory */
  74 #define FREE(PTR)          _mesa_free(PTR)
  75
  76 /** Allocate \p BYTES aligned at \p N bytes */
  77 #define ALIGN_MALLOC(BYTES, N)     _mesa_align_malloc(BYTES, N)
  78 /** Allocate and zero \p BYTES bytes aligned at \p N bytes */
  79 #define ALIGN_CALLOC(BYTES, N)     _mesa_align_calloc(BYTES, N)
  80 /** Allocate a structure of type \p T aligned at \p N bytes */
  81 #define ALIGN_MALLOC_STRUCT(T, N)  (struct T *) _mesa_align_malloc(sizeof(struct T), N)
  82 /** Allocate and zero a structure of type \p T aligned at \p N bytes */
  83 #define ALIGN_CALLOC_STRUCT(T, N)  (struct T *) _mesa_align_calloc(sizeof(struct T), N)
  84 /** Free aligned memory */
  85 #define ALIGN_FREE(PTR)            _mesa_align_free(PTR)
  86
  87 /** Copy \p BYTES bytes from \p SRC into \p DST */
  88 #define MEMCPY( DST, SRC, BYTES)   _mesa_memcpy(DST, SRC, BYTES)
  89 /** Set \p N bytes in \p DST to \p VAL */
  90 #define MEMSET( DST, VAL, N )      _mesa_memset(DST, VAL, N)
  91
  92 /*@}*/
  93
  94
  95 /*
  96  * For GL_ARB_vertex_buffer_object we need to treat vertex array pointers
  97  * as offsets into buffer stores.  Since the vertex array pointer and
  98  * buffer store pointer are both pointers and we need to add them, we use
  99  * this macro.
 100  * Both pointers/offsets are expressed in bytes.
 101  */
 102 #define ADD_POINTERS(A, B)  ( (GLubyte *) (A) + (uintptr_t) (B) )
 103
 104
 105 /**
 106  * Sometimes we treat GLfloats as GLints.  On x86 systems, moving a float
 107  * as a int (thereby using integer registers instead of FP registers) is
 108  * a performance win.  Typically, this can be done with ordinary casts.
 109  * But with gcc's -fstrict-aliasing flag (which defaults to on in gcc 3.0)
 110  * these casts generate warnings.
 111  * The following union typedef is used to solve that.
 112  */
 113 typedef union { GLfloat f; GLint i; } fi_type;
 114
 115
 116
 117 /**********************************************************************
 118  * Math macros
 119  */
 120
 121 #define MAX_GLUSHORT    0xffff
 122 #define MAX_GLUINT      0xffffffff
 123
 124 #ifndef M_PI
 125 #define M_PI (3.1415926536)
 126 #endif
 127
 128 #ifndef M_E
 129 #define M_E (2.7182818284590452354)
 130 #endif
 131
 132 #ifndef FLT_MAX_EXP
 133 #define FLT_MAX_EXP 128
 134 #endif
 135
 136 /* XXX this is a bit of a hack needed for compilation within XFree86 */
 137 #ifndef FLT_MIN
 138 #define FLT_MIN (1.0e-37)
 139 #endif
 140
 141 /* Degrees to radians conversion: */
 142 #define DEG2RAD (M_PI/180.0)
 143
 144
 145 /***
 146  *** USE_IEEE: Determine if we're using IEEE floating point
 147  ***/
 148 #if defined(__i386__) || defined(__386__) || defined(__sparc__) || \
 149     defined(__s390x__) || defined(__powerpc__) || \
 150     defined(__amd64__) || \
 151     defined(ia64) || defined(__ia64__) || \
 152     defined(__hppa__) || defined(hpux) || \
 153     defined(__mips) || defined(_MIPS_ARCH) || \
 154     defined(__arm__) || \
 155     defined(__sh__) || defined(__m32r__) || \
 156     (defined(__alpha__) && (defined(__IEEE_FLOAT) || !defined(VMS)))
 157 #define USE_IEEE
 158 #define IEEE_ONE 0x3f800000
 159 #endif
 160
 161
 162 /***
 163  *** SQRTF: single-precision square root
 164  ***/
 165 #if 0 /* _mesa_sqrtf() not accurate enough - temporarily disabled */
 166 #  define SQRTF(X)  _mesa_sqrtf(X)
 167 #elif defined(XFree86LOADER) && defined(IN_MODULE) && !defined(NO_LIBCWRAPPER)
 168 #  define SQRTF(X)  (float) xf86sqrt((float) (X))
 169 #else
 170 #  define SQRTF(X)  (float) sqrt((float) (X))
 171 #endif
 172
 173
 174 /***
 175  *** INV_SQRTF: single-precision inverse square root
 176  ***/
 177 #if 0
 178 #define INV_SQRTF(X) _mesa_inv_sqrt(X)
 179 #else
 180 #define INV_SQRTF(X) (1.0F / SQRTF(X))  /* this is faster on a P4 */
 181 #endif
 182
 183
 184 /***
 185  *** LOG2: Log base 2 of float
 186  ***/
 187 #ifdef USE_IEEE
 188 #if 0
 189 /* This is pretty fast, but not accurate enough (only 2 fractional bits).
 190  * Based on code from http://www.stereopsis.com/log2.html
 191  */
 192 static INLINE GLfloat LOG2(GLfloat x)
 193 {
 194    const GLfloat y = x * x * x * x;
 195    const GLuint ix = *((GLuint *) &y);
 196    const GLuint exp = (ix >> 23) & 0xFF;
 197    const GLint log2 = ((GLint) exp) - 127;
 198    return (GLfloat) log2 * (1.0 / 4.0);  /* 4, because of x^4 above */
 199 }
 200 #endif
 201 /* Pretty fast, and accurate.
 202  * Based on code from http://www.flipcode.com/totd/
 203  */
 204 static INLINE GLfloat LOG2(GLfloat val)
 205 {
 206    fi_type num;
 207    GLint log_2;
 208    num.f = val;
 209    log_2 = ((num.i >> 23) & 255) - 128;
 210    num.i &= ~(255 << 23);
 211    num.i += 127 << 23;
 212    num.f = ((-1.0f/3) * num.f + 2) * num.f - 2.0f/3;
 213    return num.f + log_2;
 214 }
 215 #elif defined(XFree86LOADER) && defined(IN_MODULE) && !defined(NO_LIBCWRAPPER)
 216 #define LOG2(x) ((GLfloat) (xf86log(x) * 1.442695))
 217 #else
 218 /*
 219  * NOTE: log_base_2(x) = log(x) / log(2)
 220  * NOTE: 1.442695 = 1/log(2).
 221  */
 222 #define LOG2(x)  ((GLfloat) (log(x) * 1.442695F))
 223 #endif
 224
 225
 226 /***
 227  *** IS_INF_OR_NAN: test if float is infinite or NaN
 228  ***/
 229 #ifdef USE_IEEE
 230 static INLINE int IS_INF_OR_NAN( float x )
 231 {
 232    fi_type tmp;
 233    tmp.f = x;
 234    return !(int)((unsigned int)((tmp.i & 0x7fffffff)-0x7f800000) >> 31);
 235 }
 236 #elif defined(isfinite)
 237 #define IS_INF_OR_NAN(x)        (!isfinite(x))
 238 #elif defined(finite)
 239 #define IS_INF_OR_NAN(x)        (!finite(x))
 240 #elif defined(__VMS)
 241 #define IS_INF_OR_NAN(x)        (!finite(x))
 242 #elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
 243 #define IS_INF_OR_NAN(x)        (!isfinite(x))
 244 #else
 245 #define IS_INF_OR_NAN(x)        (!finite(x))
 246 #endif
 247
 248
 249 /***
 250  *** IS_NEGATIVE: test if float is negative
 251  ***/
 252 #if defined(USE_IEEE)
 253 static INLINE int GET_FLOAT_BITS( float x )
 254 {
 255    fi_type fi;
 256    fi.f = x;
 257    return fi.i;
 258 }
 259 #define IS_NEGATIVE(x) (GET_FLOAT_BITS(x) < 0)
 260 #else
 261 #define IS_NEGATIVE(x) (x < 0.0F)
 262 #endif
 263
 264
 265 /***
 266  *** DIFFERENT_SIGNS: test if two floats have opposite signs
 267  ***/
 268 #if defined(USE_IEEE)
 269 #define DIFFERENT_SIGNS(x,y) ((GET_FLOAT_BITS(x) ^ GET_FLOAT_BITS(y)) & (1<<31))
 270 #else
 271 /* Could just use (x*y<0) except for the flatshading requirements.
 272  * Maybe there's a better way?
 273  */
 274 #define DIFFERENT_SIGNS(x,y) ((x) * (y) <= 0.0F && (x) - (y) != 0.0F)
 275 #endif
 276
 277
 278 /***
 279  *** CEILF: ceiling of float
 280  *** FLOORF: floor of float
 281  *** FABSF: absolute value of float
 282  *** LOGF: the natural logarithm (base e) of the value
 283  *** EXPF: raise e to the value
 284  *** LDEXPF: multiply value by an integral power of two
 285  *** FREXPF: extract mantissa and exponent from value
 286  ***/
 287 #if defined(XFree86LOADER) && defined(IN_MODULE) && !defined(NO_LIBCWRAPPER)
 288 #define CEILF(x)   ((GLfloat) xf86ceil(x))
 289 #define FLOORF(x)  ((GLfloat) xf86floor(x))
 290 #define FABSF(x)   ((GLfloat) xf86fabs(x))
 291 #define LOGF(x)    ((GLfloat) xf86log(x))
 292 #define EXPF(x)    ((GLfloat) xf86exp(x))
 293 #define LDEXPF(x,y)   ((GLfloat) xf86ldexp(x,y))
 294 #define FREXPF(x,y)   ((GLfloat) xf86frexp(x,y))
 295 #elif defined(__gnu_linux__)
 296 /* C99 functions */
 297 #define CEILF(x)   ceilf(x)
 298 #define FLOORF(x)  floorf(x)
 299 #define FABSF(x)   fabsf(x)
 300 #define LOGF(x)    logf(x)
 301 #define EXPF(x)    expf(x)
 302 #define LDEXPF(x,y)  ldexpf(x,y)
 303 #define FREXPF(x,y)  frexpf(x,y)
 304 #else
 305 #define CEILF(x)   ((GLfloat) ceil(x))
 306 #define FLOORF(x)  ((GLfloat) floor(x))
 307 #define FABSF(x)   ((GLfloat) fabs(x))
 308 #define LOGF(x)    ((GLfloat) log(x))
 309 #define EXPF(x)    ((GLfloat) exp(x))
 310 #define LDEXPF(x,y)  ((GLfloat) ldexp(x,y))
 311 #define FREXPF(x,y)  ((GLfloat) frexp(x,y))
 312 #endif
 313
 314
 315 /***
 316  *** IROUND: return (as an integer) float rounded to nearest integer
 317  ***/
 318 #if defined(USE_SPARC_ASM) && defined(__GNUC__) && defined(__sparc__)
 319 static INLINE int iround(float f)
 320 {
 321    int r;
 322    __asm__ ("fstoi %1, %0" : "=f" (r) : "f" (f));
 323    return r;
 324 }
 325 #define IROUND(x)  iround(x)
 326 #elif defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__) && \
 327                         (!defined(__BEOS__) || (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)))
 328 static INLINE int iround(float f)
 329 {
 330    int r;
 331    __asm__ ("fistpl %0" : "=m" (r) : "t" (f) : "st");
 332    return r;
 333 }
 334 #define IROUND(x)  iround(x)
 335 #elif defined(USE_X86_ASM) && defined(__MSC__) && defined(__WIN32__)
 336 static INLINE int iround(float f)
 337 {
 338    int r;
 339    _asm {
 340          fld f
 341          fistp r
 342         }
 343    return r;
 344 }
 345 #define IROUND(x)  iround(x)
 346 #elif defined(__WATCOMC__) && defined(__386__)
 347 long iround(float f);
 348 #pragma aux iround =                    \
 349         "push   eax"                        \
 350         "fistp  dword ptr [esp]"            \
 351         "pop    eax"                        \
 352         parm [8087]                         \
 353         value [eax]                         \
 354         modify exact [eax];
 355 #define IROUND(x)  iround(x)
 356 #else
 357 #define IROUND(f)  ((int) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))
 358 #endif
 359
 360
 361 /***
 362  *** IROUND_POS: return (as an integer) positive float rounded to nearest int
 363  ***/
 364 #ifdef DEBUG
 365 #define IROUND_POS(f) (assert((f) >= 0.0F), IROUND(f))
 366 #else
 367 #define IROUND_POS(f) (IROUND(f))
 368 #endif
 369
 370
 371 /***
 372  *** IFLOOR: return (as an integer) floor of float
 373  ***/
 374 #if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
 375 /*
 376  * IEEE floor for computers that round to nearest or even.
 377  * 'f' must be between -4194304 and 4194303.
 378  * This floor operation is done by "(iround(f + .5) + iround(f - .5)) >> 1",
 379  * but uses some IEEE specific tricks for better speed.
 380  * Contributed by Josh Vanderhoof
 381  */
 382 static INLINE int ifloor(float f)
 383 {
 384    int ai, bi;
 385    double af, bf;
 386    af = (3 << 22) + 0.5 + (double)f;
 387    bf = (3 << 22) + 0.5 - (double)f;
 388    /* GCC generates an extra fstp/fld without this. */
 389    __asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");
 390    __asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");
 391    return (ai - bi) >> 1;
 392 }
 393 #define IFLOOR(x)  ifloor(x)
 394 #elif defined(USE_IEEE)
 395 static INLINE int ifloor(float f)
 396 {
 397    int ai, bi;
 398    double af, bf;
 399    fi_type u;
 400
 401    af = (3 << 22) + 0.5 + (double)f;
 402    bf = (3 << 22) + 0.5 - (double)f;
 403    u.f = (float) af;  ai = u.i;
 404    u.f = (float) bf;  bi = u.i;
 405    return (ai - bi) >> 1;
 406 }
 407 #define IFLOOR(x)  ifloor(x)
 408 #else
 409 static INLINE int ifloor(float f)
 410 {
 411    int i = IROUND(f);
 412    return (i > f) ? i - 1 : i;
 413 }
 414 #define IFLOOR(x)  ifloor(x)
 415 #endif
 416
 417
 418 /***
 419  *** ICEIL: return (as an integer) ceiling of float
 420  ***/
 421 #if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
 422 /*
 423  * IEEE ceil for computers that round to nearest or even.
 424  * 'f' must be between -4194304 and 4194303.
 425  * This ceil operation is done by "(iround(f + .5) + iround(f - .5) + 1) >> 1",
 426  * but uses some IEEE specific tricks for better speed.
 427  * Contributed by Josh Vanderhoof
 428  */
 429 static INLINE int iceil(float f)
 430 {
 431    int ai, bi;
 432    double af, bf;
 433    af = (3 << 22) + 0.5 + (double)f;
 434    bf = (3 << 22) + 0.5 - (double)f;
 435    /* GCC generates an extra fstp/fld without this. */
 436    __asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");
 437    __asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");
 438    return (ai - bi + 1) >> 1;
 439 }
 440 #define ICEIL(x)  iceil(x)
 441 #elif defined(USE_IEEE)
 442 static INLINE int iceil(float f)
 443 {
 444    int ai, bi;
 445    double af, bf;
 446    fi_type u;
 447    af = (3 << 22) + 0.5 + (double)f;
 448    bf = (3 << 22) + 0.5 - (double)f;
 449    u.f = (float) af; ai = u.i;
 450    u.f = (float) bf; bi = u.i;
 451    return (ai - bi + 1) >> 1;
 452 }
 453 #define ICEIL(x)  iceil(x)
 454 #else
 455 static INLINE int iceil(float f)
 456 {
 457    int i = IROUND(f);
 458    return (i < f) ? i + 1 : i;
 459 }
 460 #define ICEIL(x)  iceil(x)
 461 #endif
 462
 463
 464 /***
 465  *** UNCLAMPED_FLOAT_TO_UBYTE: clamp float to [0,1] and map to ubyte in [0,255]
 466  *** CLAMPED_FLOAT_TO_UBYTE: map float known to be in [0,1] to ubyte in [0,255]
 467  ***/
 468 #if defined(USE_IEEE) && !defined(DEBUG)
 469 #define IEEE_0996 0x3f7f0000    /* 0.996 or so */
 470 /* This function/macro is sensitive to precision.  Test very carefully
 471  * if you change it!
 472  */
 473 #define UNCLAMPED_FLOAT_TO_UBYTE(UB, F)                                 \
 474         do {                                                            \
 475            fi_type __tmp;                                               \
 476            __tmp.f = (F);                                               \
 477            if (__tmp.i < 0)                                             \
 478               UB = (GLubyte) 0;                                         \
 479            else if (__tmp.i >= IEEE_0996)                               \
 480               UB = (GLubyte) 255;                                       \
 481            else {                                                       \
 482               __tmp.f = __tmp.f * (255.0F/256.0F) + 32768.0F;           \
 483               UB = (GLubyte) __tmp.i;                                   \
 484            }                                                            \
 485         } while (0)
 486 #define CLAMPED_FLOAT_TO_UBYTE(UB, F)                                   \
 487         do {                                                            \
 488            fi_type __tmp;                                               \
 489            __tmp.f = (F) * (255.0F/256.0F) + 32768.0F;                  \
 490            UB = (GLubyte) __tmp.i;                                      \
 491         } while (0)
 492 #else
 493 #define UNCLAMPED_FLOAT_TO_UBYTE(ub, f) \
 494         ub = ((GLubyte) IROUND(CLAMP((f), 0.0F, 1.0F) * 255.0F))
 495 #define CLAMPED_FLOAT_TO_UBYTE(ub, f) \
 496         ub = ((GLubyte) IROUND((f) * 255.0F))
 497 #endif
 498
 499
 500 /***
 501  *** START_FAST_MATH: Set x86 FPU to faster, 32-bit precision mode (and save
 502  ***                  original mode to a temporary).
 503  *** END_FAST_MATH: Restore x86 FPU to original mode.
 504  ***/
 505 #if defined(__GNUC__) && defined(__i386__)
 506 /*
 507  * Set the x86 FPU control word to guarentee only 32 bits of precision
 508  * are stored in registers.  Allowing the FPU to store more introduces
 509  * differences between situations where numbers are pulled out of memory
 510  * vs. situations where the compiler is able to optimize register usage.
 511  *
 512  * In the worst case, we force the compiler to use a memory access to
 513  * truncate the float, by specifying the 'volatile' keyword.
 514  */
 515 /* Hardware default: All exceptions masked, extended double precision,
 516  * round to nearest (IEEE compliant):
 517  */
 518 #define DEFAULT_X86_FPU         0x037f
 519 /* All exceptions masked, single precision, round to nearest:
 520  */
 521 #define FAST_X86_FPU            0x003f
 522 /* The fldcw instruction will cause any pending FP exceptions to be
 523  * raised prior to entering the block, and we clear any pending
 524  * exceptions before exiting the block.  Hence, asm code has free
 525  * reign over the FPU while in the fast math block.
 526  */
 527 #if defined(NO_FAST_MATH)
 528 #define START_FAST_MATH(x)                                              \
 529 do {                                                                    \
 530    static GLuint mask = DEFAULT_X86_FPU;                                \
 531    __asm__ ( "fnstcw %0" : "=m" (*&(x)) );                              \
 532    __asm__ ( "fldcw %0" : : "m" (mask) );                               \
 533 } while (0)
 534 #else
 535 #define START_FAST_MATH(x)                                              \
 536 do {                                                                    \
 537    static GLuint mask = FAST_X86_FPU;                                   \
 538    __asm__ ( "fnstcw %0" : "=m" (*&(x)) );                              \
 539    __asm__ ( "fldcw %0" : : "m" (mask) );                               \
 540 } while (0)
 541 #endif
 542 /* Restore original FPU mode, and clear any exceptions that may have
 543  * occurred in the FAST_MATH block.
 544  */
 545 #define END_FAST_MATH(x)                                                \
 546 do {                                                                    \
 547    __asm__ ( "fnclex ; fldcw %0" : : "m" (*&(x)) );                     \
 548 } while (0)
 549
 550 #elif defined(__WATCOMC__) && defined(__386__)
 551 #define DEFAULT_X86_FPU         0x037f /* See GCC comments above */
 552 #define FAST_X86_FPU            0x003f /* See GCC comments above */
 553 void _watcom_start_fast_math(unsigned short *x,unsigned short *mask);
 554 #pragma aux _watcom_start_fast_math =                                   \
 555    "fnstcw  word ptr [eax]"                                             \
 556    "fldcw   word ptr [ecx]"                                             \
 557    parm [eax] [ecx]                                                     \
 558    modify exact [];
 559 void _watcom_end_fast_math(unsigned short *x);
 560 #pragma aux _watcom_end_fast_math =                                     \
 561    "fnclex"                                                             \
 562    "fldcw   word ptr [eax]"                                             \
 563    parm [eax]                                                           \
 564    modify exact [];
 565 #if defined(NO_FAST_MATH)
 566 #define START_FAST_MATH(x)                                              \
 567 do {                                                                    \
 568    static GLushort mask = DEFAULT_X86_FPU;                                  \
 569    _watcom_start_fast_math(&x,&mask);                                   \
 570 } while (0)
 571 #else
 572 #define START_FAST_MATH(x)                                              \
 573 do {                                                                    \
 574    static GLushort mask = FAST_X86_FPU;                                 \
 575    _watcom_start_fast_math(&x,&mask);                                   \
 576 } while (0)
 577 #endif
 578 #define END_FAST_MATH(x)  _watcom_end_fast_math(&x)
 579
 580 #elif defined(_MSC_VER) && defined(_M_IX86)
 581 #define DEFAULT_X86_FPU         0x037f /* See GCC comments above */
 582 #define FAST_X86_FPU            0x003f /* See GCC comments above */
 583 #if defined(NO_FAST_MATH)
 584 #define START_FAST_MATH(x) do {\
 585         static GLuint mask = DEFAULT_X86_FPU;\
 586         __asm fnstcw word ptr [x]\
 587         __asm fldcw word ptr [mask]\
 588 } while(0)
 589 #else
 590 #define START_FAST_MATH(x) do {\
 591         static GLuint mask = FAST_X86_FPU;\
 592         __asm fnstcw word ptr [x]\
 593         __asm fldcw word ptr [mask]\
 594 } while(0)
 595 #endif
 596 #define END_FAST_MATH(x) do {\
 597         __asm fnclex\
 598         __asm fldcw word ptr [x]\
 599 } while(0)
 600
 601 #else
 602 #define START_FAST_MATH(x)  x = 0
 603 #define END_FAST_MATH(x)  (void)(x)
 604 #endif
 605
 606
 607 /**
 608  * Return 1 if this is a little endian machine, 0 if big endian.
 609  */
 610 static INLINE GLboolean
 611 _mesa_little_endian(void)
 612 {
 613    const GLuint ui = 1; /* intentionally not static */
 614    return *((const GLubyte *) &ui);
 615 }
 616
 617
 618
 619 /**********************************************************************
 620  * Functions
 621  */
 622
 623 extern void *
 624 _mesa_malloc( size_t bytes );
 625
 626 extern void *
 627 _mesa_calloc( size_t bytes );
 628
 629 extern void
 630 _mesa_free( void *ptr );
 631
 632 extern void *
 633 _mesa_align_malloc( size_t bytes, unsigned long alignment );
 634
 635 extern void *
 636 _mesa_align_calloc( size_t bytes, unsigned long alignment );
 637
 638 extern void
 639 _mesa_align_free( void *ptr );
 640
 641 extern void *
 642 _mesa_align_realloc(void *oldBuffer, size_t oldSize, size_t newSize,
 643                     unsigned long alignment);
 644
 645 extern void *
 646 _mesa_exec_malloc( GLuint size );
 647
 648 extern void
 649 _mesa_exec_free( void *addr );
 650
 651 extern void *
 652 _mesa_realloc( void *oldBuffer, size_t oldSize, size_t newSize );
 653
 654 extern void *
 655 _mesa_memcpy( void *dest, const void *src, size_t n );
 656
 657 extern void
 658 _mesa_memset( void *dst, int val, size_t n );
 659
 660 extern void
 661 _mesa_memset16( unsigned short *dst, unsigned short val, size_t n );
 662
 663 extern void
 664 _mesa_bzero( void *dst, size_t n );
 665
 666 extern int
 667 _mesa_memcmp( const void *s1, const void *s2, size_t n );
 668
 669 extern double
 670 _mesa_sin(double a);
 671
 672 extern float
 673 _mesa_sinf(float a);
 674
 675 extern double
 676 _mesa_cos(double a);
 677
 678 extern float
 679 _mesa_asinf(float x);
 680
 681 extern float
 682 _mesa_atanf(float x);
 683
 684 extern double
 685 _mesa_sqrtd(double x);
 686
 687 extern float
 688 _mesa_sqrtf(float x);
 689
 690 extern float
 691 _mesa_inv_sqrtf(float x);
 692
 693 extern double
 694 _mesa_pow(double x, double y);
 695
 696 extern int
 697 _mesa_ffs(int i);
 698
 699 extern unsigned int
 700 _mesa_bitcount(unsigned int n);
 701
 702 extern GLhalfARB
 703 _mesa_float_to_half(float f);
 704
 705 extern float
 706 _mesa_half_to_float(GLhalfARB h);
 707
 708
 709 extern void *
 710 _mesa_bsearch( const void *key, const void *base, size_t nmemb, size_t size,
 711                int (*compar)(const void *, const void *) );
 712
 713 extern char *
 714 _mesa_getenv( const char *var );
 715
 716 extern char *
 717 _mesa_strstr( const char *haystack, const char *needle );
 718
 719 extern char *
 720 _mesa_strncat( char *dest, const char *src, size_t n );
 721
 722 extern char *
 723 _mesa_strcpy( char *dest, const char *src );
 724
 725 extern char *
 726 _mesa_strncpy( char *dest, const char *src, size_t n );
 727
 728 extern size_t
 729 _mesa_strlen( const char *s );
 730
 731 extern int
 732 _mesa_strcmp( const char *s1, const char *s2 );
 733
 734 extern int
 735 _mesa_strncmp( const char *s1, const char *s2, size_t n );
 736
 737 extern char *
 738 _mesa_strdup( const char *s );
 739
 740 extern int
 741 _mesa_atoi( const char *s );
 742
 743 extern double
 744 _mesa_strtod( const char *s, char **end );
 745
 746 extern int
 747 _mesa_sprintf( char *str, const char *fmt, ... );
 748
 749 extern void
 750 _mesa_printf( const char *fmtString, ... );
 751
 752 extern int
 753 _mesa_vsprintf( char *str, const char *fmt, va_list args );
 754
 755
 756 extern void
 757 _mesa_warning( __GLcontext *gc, const char *fmtString, ... );
 758
 759 extern void
 760 _mesa_problem( const __GLcontext *ctx, const char *fmtString, ... );
 761
 762 extern void
 763 _mesa_error( __GLcontext *ctx, GLenum error, const char *fmtString, ... );
 764
 765 extern void
 766 _mesa_debug( const __GLcontext *ctx, const char *fmtString, ... );
 767
 768 extern void
 769 _mesa_exit( int status );
 770
 771
 772 extern void
 773 _mesa_init_default_imports( __GLimports *imports, void *driverCtx );
 774
 775
 776 #ifdef __cplusplus
 777 }
 778 #endif
 779
 780
 781 #endif /* IMPORTS_H */