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 /** gcc -pedantic warns about long string literals, LONGSTRING silences that */
  60 #if !defined(__GNUC__) || (__GNUC__ < 2) || \
  61     ((__GNUC__ == 2) && (__GNUC_MINOR__ <= 7))
  62 # define LONGSTRING
  63 #else
  64 # define LONGSTRING __extension__
  65 #endif
  66
  67 /*@}*/
  68
  69
  70 /**********************************************************************/
  71 /** Memory macros */
  72 /*@{*/
  73
  74 /** Allocate \p BYTES bytes */
  75 #define MALLOC(BYTES)      _mesa_malloc(BYTES)
  76 /** Allocate and zero \p BYTES bytes */
  77 #define CALLOC(BYTES)      _mesa_calloc(BYTES)
  78 /** Allocate a structure of type \p T */
  79 #define MALLOC_STRUCT(T)   (struct T *) _mesa_malloc(sizeof(struct T))
  80 /** Allocate and zero a structure of type \p T */
  81 #define CALLOC_STRUCT(T)   (struct T *) _mesa_calloc(sizeof(struct T))
  82 /** Free memory */
  83 #define FREE(PTR)          _mesa_free(PTR)
  84
  85 /** Allocate \p BYTES aligned at \p N bytes */
  86 #define ALIGN_MALLOC(BYTES, N)     _mesa_align_malloc(BYTES, N)
  87 /** Allocate and zero \p BYTES bytes aligned at \p N bytes */
  88 #define ALIGN_CALLOC(BYTES, N)     _mesa_align_calloc(BYTES, N)
  89 /** Allocate a structure of type \p T aligned at \p N bytes */
  90 #define ALIGN_MALLOC_STRUCT(T, N)  (struct T *) _mesa_align_malloc(sizeof(struct T), N)
  91 /** Allocate and zero a structure of type \p T aligned at \p N bytes */
  92 #define ALIGN_CALLOC_STRUCT(T, N)  (struct T *) _mesa_align_calloc(sizeof(struct T), N)
  93 /** Free aligned memory */
  94 #define ALIGN_FREE(PTR)            _mesa_align_free(PTR)
  95
  96 /** Copy \p BYTES bytes from \p SRC into \p DST */
  97 #define MEMCPY( DST, SRC, BYTES)   _mesa_memcpy(DST, SRC, BYTES)
  98 /** Set \p N bytes in \p DST to \p VAL */
  99 #define MEMSET( DST, VAL, N )      _mesa_memset(DST, VAL, N)
 100
 101 /*@}*/
 102
 103
 104 /*
 105  * For GL_ARB_vertex_buffer_object we need to treat vertex array pointers
 106  * as offsets into buffer stores.  Since the vertex array pointer and
 107  * buffer store pointer are both pointers and we need to add them, we use
 108  * this macro.
 109  * Both pointers/offsets are expressed in bytes.
 110  */
 111 #define ADD_POINTERS(A, B)  ( (GLubyte *) (A) + (uintptr_t) (B) )
 112
 113
 114 /**
 115  * Sometimes we treat GLfloats as GLints.  On x86 systems, moving a float
 116  * as a int (thereby using integer registers instead of FP registers) is
 117  * a performance win.  Typically, this can be done with ordinary casts.
 118  * But with gcc's -fstrict-aliasing flag (which defaults to on in gcc 3.0)
 119  * these casts generate warnings.
 120  * The following union typedef is used to solve that.
 121  */
 122 typedef union { GLfloat f; GLint i; } fi_type;
 123
 124
 125
 126 /**********************************************************************
 127  * Math macros
 128  */
 129
 130 #define MAX_GLUSHORT    0xffff
 131 #define MAX_GLUINT      0xffffffff
 132
 133 #ifndef M_PI
 134 #define M_PI (3.1415926536)
 135 #endif
 136
 137 #ifndef M_E
 138 #define M_E (2.7182818284590452354)
 139 #endif
 140
 141 #ifndef FLT_MAX_EXP
 142 #define FLT_MAX_EXP 128
 143 #endif
 144
 145 /* Degrees to radians conversion: */
 146 #define DEG2RAD (M_PI/180.0)
 147
 148
 149 /***
 150  *** USE_IEEE: Determine if we're using IEEE floating point
 151  ***/
 152 #if defined(__i386__) || defined(__386__) || defined(__sparc__) || \
 153     defined(__s390x__) || defined(__powerpc__) || \
 154     defined(__amd64__) || \
 155     defined(ia64) || defined(__ia64__) || \
 156     defined(__hppa__) || defined(hpux) || \
 157     defined(__mips) || defined(_MIPS_ARCH) || \
 158     defined(__arm__) || \
 159     defined(__sh__) || defined(__m32r__) || \
 160     (defined(__alpha__) && (defined(__IEEE_FLOAT) || !defined(VMS)))
 161 #define USE_IEEE
 162 #define IEEE_ONE 0x3f800000
 163 #endif
 164
 165
 166 /***
 167  *** SQRTF: single-precision square root
 168  ***/
 169 #if 0 /* _mesa_sqrtf() not accurate enough - temporarily disabled */
 170 #  define SQRTF(X)  _mesa_sqrtf(X)
 171 #else
 172 #  define SQRTF(X)  (float) sqrt((float) (X))
 173 #endif
 174
 175
 176 /***
 177  *** INV_SQRTF: single-precision inverse square root
 178  ***/
 179 #if 0
 180 #define INV_SQRTF(X) _mesa_inv_sqrt(X)
 181 #else
 182 #define INV_SQRTF(X) (1.0F / SQRTF(X))  /* this is faster on a P4 */
 183 #endif
 184
 185
 186 /***
 187  *** LOG2: Log base 2 of float
 188  ***/
 189 #ifdef USE_IEEE
 190 #if 0
 191 /* This is pretty fast, but not accurate enough (only 2 fractional bits).
 192  * Based on code from http://www.stereopsis.com/log2.html
 193  */
 194 static INLINE GLfloat LOG2(GLfloat x)
 195 {
 196    const GLfloat y = x * x * x * x;
 197    const GLuint ix = *((GLuint *) &y);
 198    const GLuint exp = (ix >> 23) & 0xFF;
 199    const GLint log2 = ((GLint) exp) - 127;
 200    return (GLfloat) log2 * (1.0 / 4.0);  /* 4, because of x^4 above */
 201 }
 202 #endif
 203 /* Pretty fast, and accurate.
 204  * Based on code from http://www.flipcode.com/totd/
 205  */
 206 static INLINE GLfloat LOG2(GLfloat val)
 207 {
 208    fi_type num;
 209    GLint log_2;
 210    num.f = val;
 211    log_2 = ((num.i >> 23) & 255) - 128;
 212    num.i &= ~(255 << 23);
 213    num.i += 127 << 23;
 214    num.f = ((-1.0f/3) * num.f + 2) * num.f - 2.0f/3;
 215    return num.f + log_2;
 216 }
 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(__gnu_linux__)
 288 /* C99 functions */
 289 #define CEILF(x)   ceilf(x)
 290 #define FLOORF(x)  floorf(x)
 291 #define FABSF(x)   fabsf(x)
 292 #define LOGF(x)    logf(x)
 293 #define EXPF(x)    expf(x)
 294 #define LDEXPF(x,y)  ldexpf(x,y)
 295 #define FREXPF(x,y)  frexpf(x,y)
 296 #else
 297 #define CEILF(x)   ((GLfloat) ceil(x))
 298 #define FLOORF(x)  ((GLfloat) floor(x))
 299 #define FABSF(x)   ((GLfloat) fabs(x))
 300 #define LOGF(x)    ((GLfloat) log(x))
 301 #define EXPF(x)    ((GLfloat) exp(x))
 302 #define LDEXPF(x,y)  ((GLfloat) ldexp(x,y))
 303 #define FREXPF(x,y)  ((GLfloat) frexp(x,y))
 304 #endif
 305
 306
 307 /***
 308  *** IROUND: return (as an integer) float rounded to nearest integer
 309  ***/
 310 #if defined(USE_SPARC_ASM) && defined(__GNUC__) && defined(__sparc__)
 311 static INLINE int iround(float f)
 312 {
 313    int r;
 314    __asm__ ("fstoi %1, %0" : "=f" (r) : "f" (f));
 315    return r;
 316 }
 317 #define IROUND(x)  iround(x)
 318 #elif defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__) && \
 319                         (!defined(__BEOS__) || (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)))
 320 static INLINE int iround(float f)
 321 {
 322    int r;
 323    __asm__ ("fistpl %0" : "=m" (r) : "t" (f) : "st");
 324    return r;
 325 }
 326 #define IROUND(x)  iround(x)
 327 #elif defined(USE_X86_ASM) && defined(__MSC__) && defined(__WIN32__)
 328 static INLINE int iround(float f)
 329 {
 330    int r;
 331    _asm {
 332          fld f
 333          fistp r
 334         }
 335    return r;
 336 }
 337 #define IROUND(x)  iround(x)
 338 #elif defined(__WATCOMC__) && defined(__386__)
 339 long iround(float f);
 340 #pragma aux iround =                    \
 341         "push   eax"                        \
 342         "fistp  dword ptr [esp]"            \
 343         "pop    eax"                        \
 344         parm [8087]                         \
 345         value [eax]                         \
 346         modify exact [eax];
 347 #define IROUND(x)  iround(x)
 348 #else
 349 #define IROUND(f)  ((int) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))
 350 #endif
 351
 352
 353 /***
 354  *** IROUND_POS: return (as an integer) positive float rounded to nearest int
 355  ***/
 356 #ifdef DEBUG
 357 #define IROUND_POS(f) (assert((f) >= 0.0F), IROUND(f))
 358 #else
 359 #define IROUND_POS(f) (IROUND(f))
 360 #endif
 361
 362
 363 /***
 364  *** IFLOOR: return (as an integer) floor of float
 365  ***/
 366 #if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
 367 /*
 368  * IEEE floor for computers that round to nearest or even.
 369  * 'f' must be between -4194304 and 4194303.
 370  * This floor operation is done by "(iround(f + .5) + iround(f - .5)) >> 1",
 371  * but uses some IEEE specific tricks for better speed.
 372  * Contributed by Josh Vanderhoof
 373  */
 374 static INLINE int ifloor(float f)
 375 {
 376    int ai, bi;
 377    double af, bf;
 378    af = (3 << 22) + 0.5 + (double)f;
 379    bf = (3 << 22) + 0.5 - (double)f;
 380    /* GCC generates an extra fstp/fld without this. */
 381    __asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");
 382    __asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");
 383    return (ai - bi) >> 1;
 384 }
 385 #define IFLOOR(x)  ifloor(x)
 386 #elif defined(USE_IEEE)
 387 static INLINE int ifloor(float f)
 388 {
 389    int ai, bi;
 390    double af, bf;
 391    fi_type u;
 392
 393    af = (3 << 22) + 0.5 + (double)f;
 394    bf = (3 << 22) + 0.5 - (double)f;
 395    u.f = (float) af;  ai = u.i;
 396    u.f = (float) bf;  bi = u.i;
 397    return (ai - bi) >> 1;
 398 }
 399 #define IFLOOR(x)  ifloor(x)
 400 #else
 401 static INLINE int ifloor(float f)
 402 {
 403    int i = IROUND(f);
 404    return (i > f) ? i - 1 : i;
 405 }
 406 #define IFLOOR(x)  ifloor(x)
 407 #endif
 408
 409
 410 /***
 411  *** ICEIL: return (as an integer) ceiling of float
 412  ***/
 413 #if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
 414 /*
 415  * IEEE ceil for computers that round to nearest or even.
 416  * 'f' must be between -4194304 and 4194303.
 417  * This ceil operation is done by "(iround(f + .5) + iround(f - .5) + 1) >> 1",
 418  * but uses some IEEE specific tricks for better speed.
 419  * Contributed by Josh Vanderhoof
 420  */
 421 static INLINE int iceil(float f)
 422 {
 423    int ai, bi;
 424    double af, bf;
 425    af = (3 << 22) + 0.5 + (double)f;
 426    bf = (3 << 22) + 0.5 - (double)f;
 427    /* GCC generates an extra fstp/fld without this. */
 428    __asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");
 429    __asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");
 430    return (ai - bi + 1) >> 1;
 431 }
 432 #define ICEIL(x)  iceil(x)
 433 #elif defined(USE_IEEE)
 434 static INLINE int iceil(float f)
 435 {
 436    int ai, bi;
 437    double af, bf;
 438    fi_type u;
 439    af = (3 << 22) + 0.5 + (double)f;
 440    bf = (3 << 22) + 0.5 - (double)f;
 441    u.f = (float) af; ai = u.i;
 442    u.f = (float) bf; bi = u.i;
 443    return (ai - bi + 1) >> 1;
 444 }
 445 #define ICEIL(x)  iceil(x)
 446 #else
 447 static INLINE int iceil(float f)
 448 {
 449    int i = IROUND(f);
 450    return (i < f) ? i + 1 : i;
 451 }
 452 #define ICEIL(x)  iceil(x)
 453 #endif
 454
 455
 456 /***
 457  *** UNCLAMPED_FLOAT_TO_UBYTE: clamp float to [0,1] and map to ubyte in [0,255]
 458  *** CLAMPED_FLOAT_TO_UBYTE: map float known to be in [0,1] to ubyte in [0,255]
 459  ***/
 460 #if defined(USE_IEEE) && !defined(DEBUG)
 461 #define IEEE_0996 0x3f7f0000    /* 0.996 or so */
 462 /* This function/macro is sensitive to precision.  Test very carefully
 463  * if you change it!
 464  */
 465 #define UNCLAMPED_FLOAT_TO_UBYTE(UB, F)                                 \
 466         do {                                                            \
 467            fi_type __tmp;                                               \
 468            __tmp.f = (F);                                               \
 469            if (__tmp.i < 0)                                             \
 470               UB = (GLubyte) 0;                                         \
 471            else if (__tmp.i >= IEEE_0996)                               \
 472               UB = (GLubyte) 255;                                       \
 473            else {                                                       \
 474               __tmp.f = __tmp.f * (255.0F/256.0F) + 32768.0F;           \
 475               UB = (GLubyte) __tmp.i;                                   \
 476            }                                                            \
 477         } while (0)
 478 #define CLAMPED_FLOAT_TO_UBYTE(UB, F)                                   \
 479         do {                                                            \
 480            fi_type __tmp;                                               \
 481            __tmp.f = (F) * (255.0F/256.0F) + 32768.0F;                  \
 482            UB = (GLubyte) __tmp.i;                                      \
 483         } while (0)
 484 #else
 485 #define UNCLAMPED_FLOAT_TO_UBYTE(ub, f) \
 486         ub = ((GLubyte) IROUND(CLAMP((f), 0.0F, 1.0F) * 255.0F))
 487 #define CLAMPED_FLOAT_TO_UBYTE(ub, f) \
 488         ub = ((GLubyte) IROUND((f) * 255.0F))
 489 #endif
 490
 491
 492 /***
 493  *** START_FAST_MATH: Set x86 FPU to faster, 32-bit precision mode (and save
 494  ***                  original mode to a temporary).
 495  *** END_FAST_MATH: Restore x86 FPU to original mode.
 496  ***/
 497 #if defined(__GNUC__) && defined(__i386__)
 498 /*
 499  * Set the x86 FPU control word to guarentee only 32 bits of precision
 500  * are stored in registers.  Allowing the FPU to store more introduces
 501  * differences between situations where numbers are pulled out of memory
 502  * vs. situations where the compiler is able to optimize register usage.
 503  *
 504  * In the worst case, we force the compiler to use a memory access to
 505  * truncate the float, by specifying the 'volatile' keyword.
 506  */
 507 /* Hardware default: All exceptions masked, extended double precision,
 508  * round to nearest (IEEE compliant):
 509  */
 510 #define DEFAULT_X86_FPU         0x037f
 511 /* All exceptions masked, single precision, round to nearest:
 512  */
 513 #define FAST_X86_FPU            0x003f
 514 /* The fldcw instruction will cause any pending FP exceptions to be
 515  * raised prior to entering the block, and we clear any pending
 516  * exceptions before exiting the block.  Hence, asm code has free
 517  * reign over the FPU while in the fast math block.
 518  */
 519 #if defined(NO_FAST_MATH)
 520 #define START_FAST_MATH(x)                                              \
 521 do {                                                                    \
 522    static GLuint mask = DEFAULT_X86_FPU;                                \
 523    __asm__ ( "fnstcw %0" : "=m" (*&(x)) );                              \
 524    __asm__ ( "fldcw %0" : : "m" (mask) );                               \
 525 } while (0)
 526 #else
 527 #define START_FAST_MATH(x)                                              \
 528 do {                                                                    \
 529    static GLuint mask = FAST_X86_FPU;                                   \
 530    __asm__ ( "fnstcw %0" : "=m" (*&(x)) );                              \
 531    __asm__ ( "fldcw %0" : : "m" (mask) );                               \
 532 } while (0)
 533 #endif
 534 /* Restore original FPU mode, and clear any exceptions that may have
 535  * occurred in the FAST_MATH block.
 536  */
 537 #define END_FAST_MATH(x)                                                \
 538 do {                                                                    \
 539    __asm__ ( "fnclex ; fldcw %0" : : "m" (*&(x)) );                     \
 540 } while (0)
 541
 542 #elif defined(__WATCOMC__) && defined(__386__)
 543 #define DEFAULT_X86_FPU         0x037f /* See GCC comments above */
 544 #define FAST_X86_FPU            0x003f /* See GCC comments above */
 545 void _watcom_start_fast_math(unsigned short *x,unsigned short *mask);
 546 #pragma aux _watcom_start_fast_math =                                   \
 547    "fnstcw  word ptr [eax]"                                             \
 548    "fldcw   word ptr [ecx]"                                             \
 549    parm [eax] [ecx]                                                     \
 550    modify exact [];
 551 void _watcom_end_fast_math(unsigned short *x);
 552 #pragma aux _watcom_end_fast_math =                                     \
 553    "fnclex"                                                             \
 554    "fldcw   word ptr [eax]"                                             \
 555    parm [eax]                                                           \
 556    modify exact [];
 557 #if defined(NO_FAST_MATH)
 558 #define START_FAST_MATH(x)                                              \
 559 do {                                                                    \
 560    static GLushort mask = DEFAULT_X86_FPU;                                  \
 561    _watcom_start_fast_math(&x,&mask);                                   \
 562 } while (0)
 563 #else
 564 #define START_FAST_MATH(x)                                              \
 565 do {                                                                    \
 566    static GLushort mask = FAST_X86_FPU;                                 \
 567    _watcom_start_fast_math(&x,&mask);                                   \
 568 } while (0)
 569 #endif
 570 #define END_FAST_MATH(x)  _watcom_end_fast_math(&x)
 571
 572 #elif defined(_MSC_VER) && defined(_M_IX86)
 573 #define DEFAULT_X86_FPU         0x037f /* See GCC comments above */
 574 #define FAST_X86_FPU            0x003f /* See GCC comments above */
 575 #if defined(NO_FAST_MATH)
 576 #define START_FAST_MATH(x) do {\
 577         static GLuint mask = DEFAULT_X86_FPU;\
 578         __asm fnstcw word ptr [x]\
 579         __asm fldcw word ptr [mask]\
 580 } while(0)
 581 #else
 582 #define START_FAST_MATH(x) do {\
 583         static GLuint mask = FAST_X86_FPU;\
 584         __asm fnstcw word ptr [x]\
 585         __asm fldcw word ptr [mask]\
 586 } while(0)
 587 #endif
 588 #define END_FAST_MATH(x) do {\
 589         __asm fnclex\
 590         __asm fldcw word ptr [x]\
 591 } while(0)
 592
 593 #else
 594 #define START_FAST_MATH(x)  x = 0
 595 #define END_FAST_MATH(x)  (void)(x)
 596 #endif
 597
 598
 599 /**
 600  * Return 1 if this is a little endian machine, 0 if big endian.
 601  */
 602 static INLINE GLboolean
 603 _mesa_little_endian(void)
 604 {
 605    const GLuint ui = 1; /* intentionally not static */
 606    return *((const GLubyte *) &ui);
 607 }
 608
 609
 610
 611 /**********************************************************************
 612  * Functions
 613  */
 614
 615 extern void *
 616 _mesa_malloc( size_t bytes );
 617
 618 extern void *
 619 _mesa_calloc( size_t bytes );
 620
 621 extern void
 622 _mesa_free( void *ptr );
 623
 624 extern void *
 625 _mesa_align_malloc( size_t bytes, unsigned long alignment );
 626
 627 extern void *
 628 _mesa_align_calloc( size_t bytes, unsigned long alignment );
 629
 630 extern void
 631 _mesa_align_free( void *ptr );
 632
 633 extern void *
 634 _mesa_align_realloc(void *oldBuffer, size_t oldSize, size_t newSize,
 635                     unsigned long alignment);
 636
 637 extern void *
 638 _mesa_exec_malloc( GLuint size );
 639
 640 extern void
 641 _mesa_exec_free( void *addr );
 642
 643 extern void *
 644 _mesa_realloc( void *oldBuffer, size_t oldSize, size_t newSize );
 645
 646 extern void *
 647 _mesa_memcpy( void *dest, const void *src, size_t n );
 648
 649 extern void
 650 _mesa_memset( void *dst, int val, size_t n );
 651
 652 extern void
 653 _mesa_memset16( unsigned short *dst, unsigned short val, size_t n );
 654
 655 extern void
 656 _mesa_bzero( void *dst, size_t n );
 657
 658 extern int
 659 _mesa_memcmp( const void *s1, const void *s2, size_t n );
 660
 661 extern double
 662 _mesa_sin(double a);
 663
 664 extern float
 665 _mesa_sinf(float a);
 666
 667 extern double
 668 _mesa_cos(double a);
 669
 670 extern float
 671 _mesa_asinf(float x);
 672
 673 extern float
 674 _mesa_atanf(float x);
 675
 676 extern double
 677 _mesa_sqrtd(double x);
 678
 679 extern float
 680 _mesa_sqrtf(float x);
 681
 682 extern float
 683 _mesa_inv_sqrtf(float x);
 684
 685 extern double
 686 _mesa_pow(double x, double y);
 687
 688 extern int
 689 _mesa_ffs(int i);
 690
 691 extern int
 692 _mesa_ffsll(long long i);
 693
 694 extern unsigned int
 695 _mesa_bitcount(unsigned int n);
 696
 697 extern GLhalfARB
 698 _mesa_float_to_half(float f);
 699
 700 extern float
 701 _mesa_half_to_float(GLhalfARB h);
 702
 703
 704 extern void *
 705 _mesa_bsearch( const void *key, const void *base, size_t nmemb, size_t size,
 706                int (*compar)(const void *, const void *) );
 707
 708 extern char *
 709 _mesa_getenv( const char *var );
 710
 711 extern char *
 712 _mesa_strstr( const char *haystack, const char *needle );
 713
 714 extern char *
 715 _mesa_strncat( char *dest, const char *src, size_t n );
 716
 717 extern char *
 718 _mesa_strcpy( char *dest, const char *src );
 719
 720 extern char *
 721 _mesa_strncpy( char *dest, const char *src, size_t n );
 722
 723 extern size_t
 724 _mesa_strlen( const char *s );
 725
 726 extern int
 727 _mesa_strcmp( const char *s1, const char *s2 );
 728
 729 extern int
 730 _mesa_strncmp( const char *s1, const char *s2, size_t n );
 731
 732 extern char *
 733 _mesa_strdup( const char *s );
 734
 735 extern int
 736 _mesa_atoi( const char *s );
 737
 738 extern double
 739 _mesa_strtod( const char *s, char **end );
 740
 741 extern int
 742 _mesa_sprintf( char *str, const char *fmt, ... );
 743
 744 extern void
 745 _mesa_printf( const char *fmtString, ... );
 746
 747 extern int
 748 _mesa_vsprintf( char *str, const char *fmt, va_list args );
 749
 750
 751 extern void
 752 _mesa_warning( __GLcontext *gc, const char *fmtString, ... );
 753
 754 extern void
 755 _mesa_problem( const __GLcontext *ctx, const char *fmtString, ... );
 756
 757 extern void
 758 _mesa_error( __GLcontext *ctx, GLenum error, const char *fmtString, ... );
 759
 760 extern void
 761 _mesa_debug( const __GLcontext *ctx, const char *fmtString, ... );
 762
 763 extern void
 764 _mesa_exit( int status );
 765
 766
 767 extern void
 768 _mesa_init_default_imports( __GLimports *imports, void *driverCtx );
 769
 770
 771 #ifdef __cplusplus
 772 }
 773 #endif
 774
 775
 776 #endif /* IMPORTS_H */