src/mesa/main/imports.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5
   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
 133 /* XXX this is a bit of a hack needed for compilation within XFree86 */
 134 #ifndef FLT_MIN
 135 #define FLT_MIN (1.0e-37)
 136 #endif
 137
 138 /* Degrees to radians conversion: */
 139 #define DEG2RAD (M_PI/180.0)
 140
 141
 142 /***
 143  *** USE_IEEE: Determine if we're using IEEE floating point
 144  ***/
 145 #if defined(__i386__) || defined(__386__) || defined(__sparc__) || \
 146     defined(__s390x__) || defined(__powerpc__) || \
 147     defined(__amd64__) || \
 148     defined(ia64) || defined(__ia64__) || \
 149     defined(__hppa__) || defined(hpux) || \
 150     defined(__mips) || defined(_MIPS_ARCH) || \
 151     defined(__arm__) || \
 152     defined(__sh__) || \
 153     (defined(__alpha__) && (defined(__IEEE_FLOAT) || !defined(VMS)))
 154 #define USE_IEEE
 155 #define IEEE_ONE 0x3f800000
 156 #endif
 157
 158
 159 /***
 160  *** SQRTF: single-precision square root
 161  ***/
 162 #if 0 /* _mesa_sqrtf() not accurate enough - temporarily disabled */
 163 #  define SQRTF(X)  _mesa_sqrtf(X)
 164 #elif defined(XFree86LOADER) && defined(IN_MODULE) && !defined(NO_LIBCWRAPPER)
 165 #  define SQRTF(X)  (float) xf86sqrt((float) (X))
 166 #else
 167 #  define SQRTF(X)  (float) sqrt((float) (X))
 168 #endif
 169
 170
 171 /***
 172  *** INV_SQRTF: single-precision inverse square root
 173  ***/
 174 #if 0
 175 #define INV_SQRTF(X) _mesa_inv_sqrt(X)
 176 #else
 177 #define INV_SQRTF(X) (1.0F / SQRTF(X))  /* this is faster on a P4 */
 178 #endif
 179
 180
 181 /***
 182  *** LOG2: Log base 2 of float
 183  ***/
 184 #ifdef USE_IEEE
 185 #if 0
 186 /* This is pretty fast, but not accurate enough (only 2 fractional bits).
 187  * Based on code from http://www.stereopsis.com/log2.html
 188  */
 189 static INLINE GLfloat LOG2(GLfloat x)
 190 {
 191    const GLfloat y = x * x * x * x;
 192    const GLuint ix = *((GLuint *) &y);
 193    const GLuint exp = (ix >> 23) & 0xFF;
 194    const GLint log2 = ((GLint) exp) - 127;
 195    return (GLfloat) log2 * (1.0 / 4.0);  /* 4, because of x^4 above */
 196 }
 197 #endif
 198 /* Pretty fast, and accurate.
 199  * Based on code from http://www.flipcode.com/totd/
 200  */
 201 static INLINE GLfloat LOG2(GLfloat val)
 202 {
 203    fi_type num;
 204    GLint log_2;
 205    num.f = val;
 206    log_2 = ((num.i >> 23) & 255) - 128;
 207    num.i &= ~(255 << 23);
 208    num.i += 127 << 23;
 209    num.f = ((-1.0f/3) * num.f + 2) * num.f - 2.0f/3;
 210    return num.f + log_2;
 211 }
 212 #elif defined(XFree86LOADER) && defined(IN_MODULE) && !defined(NO_LIBCWRAPPER)
 213 #define LOG2(x) ((GLfloat) (xf86log(x) * 1.442695))
 214 #else
 215 /*
 216  * NOTE: log_base_2(x) = log(x) / log(2)
 217  * NOTE: 1.442695 = 1/log(2).
 218  */
 219 #define LOG2(x)  ((GLfloat) (log(x) * 1.442695F))
 220 #endif
 221
 222
 223 /***
 224  *** IS_INF_OR_NAN: test if float is infinite or NaN
 225  ***/
 226 #ifdef USE_IEEE
 227 static INLINE int IS_INF_OR_NAN( float x )
 228 {
 229    fi_type tmp;
 230    tmp.f = x;
 231    return !(int)((unsigned int)((tmp.i & 0x7fffffff)-0x7f800000) >> 31);
 232 }
 233 #elif defined(isfinite)
 234 #define IS_INF_OR_NAN(x)        (!isfinite(x))
 235 #elif defined(finite)
 236 #define IS_INF_OR_NAN(x)        (!finite(x))
 237 #elif defined(__VMS)
 238 #define IS_INF_OR_NAN(x)        (!finite(x))
 239 #elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
 240 #define IS_INF_OR_NAN(x)        (!isfinite(x))
 241 #else
 242 #define IS_INF_OR_NAN(x)        (!finite(x))
 243 #endif
 244
 245
 246 /***
 247  *** IS_NEGATIVE: test if float is negative
 248  ***/
 249 #if defined(USE_IEEE)
 250 static INLINE int GET_FLOAT_BITS( float x )
 251 {
 252    fi_type fi;
 253    fi.f = x;
 254    return fi.i;
 255 }
 256 #define IS_NEGATIVE(x) (GET_FLOAT_BITS(x) < 0)
 257 #else
 258 #define IS_NEGATIVE(x) (x < 0.0F)
 259 #endif
 260
 261
 262 /***
 263  *** DIFFERENT_SIGNS: test if two floats have opposite signs
 264  ***/
 265 #if defined(USE_IEEE)
 266 #define DIFFERENT_SIGNS(x,y) ((GET_FLOAT_BITS(x) ^ GET_FLOAT_BITS(y)) & (1<<31))
 267 #else
 268 /* Could just use (x*y<0) except for the flatshading requirements.
 269  * Maybe there's a better way?
 270  */
 271 #define DIFFERENT_SIGNS(x,y) ((x) * (y) <= 0.0F && (x) - (y) != 0.0F)
 272 #endif
 273
 274
 275 /***
 276  *** CEILF: ceiling of float
 277  *** FLOORF: floor of float
 278  *** FABSF: absolute value of float
 279  *** LOGF: the natural logarithm (base e) of the value
 280  *** EXPF: raise e to the value
 281  *** LDEXPF: multiply value by an integral power of two
 282  *** FREXPF: extract mantissa and exponent from value
 283  ***/
 284 #if defined(XFree86LOADER) && defined(IN_MODULE) && !defined(NO_LIBCWRAPPER)
 285 #define CEILF(x)   ((GLfloat) xf86ceil(x))
 286 #define FLOORF(x)  ((GLfloat) xf86floor(x))
 287 #define FABSF(x)   ((GLfloat) xf86fabs(x))
 288 #define LOGF(x)    ((GLfloat) xf86log(x))
 289 #define EXPF(x)    ((GLfloat) xf86exp(x))
 290 #define LDEXPF(x,y)   ((GLfloat) xf86ldexp(x,y))
 291 #define FREXPF(x,y)   ((GLfloat) xf86frexp(x,y))
 292 #elif defined(__gnu_linux__)
 293 /* C99 functions */
 294 #define CEILF(x)   ceilf(x)
 295 #define FLOORF(x)  floorf(x)
 296 #define FABSF(x)   fabsf(x)
 297 #define LOGF(x)    logf(x)
 298 #define EXPF(x)    expf(x)
 299 #define LDEXPF(x,y)  ldexpf(x,y)
 300 #define FREXPF(x,y)  frexpf(x,y)
 301 #else
 302 #define CEILF(x)   ((GLfloat) ceil(x))
 303 #define FLOORF(x)  ((GLfloat) floor(x))
 304 #define FABSF(x)   ((GLfloat) fabs(x))
 305 #define LOGF(x)    ((GLfloat) log(x))
 306 #define EXPF(x)    ((GLfloat) exp(x))
 307 #define LDEXPF(x,y)  ((GLfloat) ldexp(x,y))
 308 #define FREXPF(x,y)  ((GLfloat) frexp(x,y))
 309 #endif
 310
 311
 312 /***
 313  *** IROUND: return (as an integer) float rounded to nearest integer
 314  ***/
 315 #if defined(USE_SPARC_ASM) && defined(__GNUC__) && defined(__sparc__)
 316 static INLINE int iround(float f)
 317 {
 318    int r;
 319    __asm__ ("fstoi %1, %0" : "=f" (r) : "f" (f));
 320    return r;
 321 }
 322 #define IROUND(x)  iround(x)
 323 #elif defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__) && \
 324                         (!defined(__BEOS__) || (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)))
 325 static INLINE int iround(float f)
 326 {
 327    int r;
 328    __asm__ ("fistpl %0" : "=m" (r) : "t" (f) : "st");
 329    return r;
 330 }
 331 #define IROUND(x)  iround(x)
 332 #elif defined(USE_X86_ASM) && defined(__MSC__) && defined(__WIN32__)
 333 static INLINE int iround(float f)
 334 {
 335    int r;
 336    _asm {
 337          fld f
 338          fistp r
 339         }
 340    return r;
 341 }
 342 #define IROUND(x)  iround(x)
 343 #elif defined(__WATCOMC__) && defined(__386__)
 344 long iround(float f);
 345 #pragma aux iround =                    \
 346         "push   eax"                        \
 347         "fistp  dword ptr [esp]"            \
 348         "pop    eax"                        \
 349         parm [8087]                         \
 350         value [eax]                         \
 351         modify exact [eax];
 352 #define IROUND(x)  iround(x)
 353 #else
 354 #define IROUND(f)  ((int) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))
 355 #endif
 356
 357
 358 /***
 359  *** IROUND_POS: return (as an integer) positive float rounded to nearest int
 360  ***/
 361 #ifdef DEBUG
 362 #define IROUND_POS(f) (assert((f) >= 0.0F), IROUND(f))
 363 #else
 364 #define IROUND_POS(f) (IROUND(f))
 365 #endif
 366
 367
 368 /***
 369  *** IFLOOR: return (as an integer) floor of float
 370  ***/
 371 #if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
 372 /*
 373  * IEEE floor for computers that round to nearest or even.
 374  * 'f' must be between -4194304 and 4194303.
 375  * This floor operation is done by "(iround(f + .5) + iround(f - .5)) >> 1",
 376  * but uses some IEEE specific tricks for better speed.
 377  * Contributed by Josh Vanderhoof
 378  */
 379 static INLINE int ifloor(float f)
 380 {
 381    int ai, bi;
 382    double af, bf;
 383    af = (3 << 22) + 0.5 + (double)f;
 384    bf = (3 << 22) + 0.5 - (double)f;
 385    /* GCC generates an extra fstp/fld without this. */
 386    __asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");
 387    __asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");
 388    return (ai - bi) >> 1;
 389 }
 390 #define IFLOOR(x)  ifloor(x)
 391 #elif defined(USE_IEEE)
 392 static INLINE int ifloor(float f)
 393 {
 394    int ai, bi;
 395    double af, bf;
 396    fi_type u;
 397
 398    af = (3 << 22) + 0.5 + (double)f;
 399    bf = (3 << 22) + 0.5 - (double)f;
 400    u.f = (float) af;  ai = u.i;
 401    u.f = (float) bf;  bi = u.i;
 402    return (ai - bi) >> 1;
 403 }
 404 #define IFLOOR(x)  ifloor(x)
 405 #else
 406 static INLINE int ifloor(float f)
 407 {
 408    int i = IROUND(f);
 409    return (i > f) ? i - 1 : i;
 410 }
 411 #define IFLOOR(x)  ifloor(x)
 412 #endif
 413
 414
 415 /***
 416  *** ICEIL: return (as an integer) ceiling of float
 417  ***/
 418 #if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
 419 /*
 420  * IEEE ceil for computers that round to nearest or even.
 421  * 'f' must be between -4194304 and 4194303.
 422  * This ceil operation is done by "(iround(f + .5) + iround(f - .5) + 1) >> 1",
 423  * but uses some IEEE specific tricks for better speed.
 424  * Contributed by Josh Vanderhoof
 425  */
 426 static INLINE int iceil(float f)
 427 {
 428    int ai, bi;
 429    double af, bf;
 430    af = (3 << 22) + 0.5 + (double)f;
 431    bf = (3 << 22) + 0.5 - (double)f;
 432    /* GCC generates an extra fstp/fld without this. */
 433    __asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");
 434    __asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");
 435    return (ai - bi + 1) >> 1;
 436 }
 437 #define ICEIL(x)  iceil(x)
 438 #elif defined(USE_IEEE)
 439 static INLINE int iceil(float f)
 440 {
 441    int ai, bi;
 442    double af, bf;
 443    fi_type u;
 444    af = (3 << 22) + 0.5 + (double)f;
 445    bf = (3 << 22) + 0.5 - (double)f;
 446    u.f = (float) af; ai = u.i;
 447    u.f = (float) bf; bi = u.i;
 448    return (ai - bi + 1) >> 1;
 449 }
 450 #define ICEIL(x)  iceil(x)
 451 #else
 452 static INLINE int iceil(float f)
 453 {
 454    int i = IROUND(f);
 455    return (i < f) ? i + 1 : i;
 456 }
 457 #define ICEIL(x)  iceil(x)
 458 #endif
 459
 460
 461 /***
 462  *** UNCLAMPED_FLOAT_TO_UBYTE: clamp float to [0,1] and map to ubyte in [0,255]
 463  *** CLAMPED_FLOAT_TO_UBYTE: map float known to be in [0,1] to ubyte in [0,255]
 464  ***/
 465 #if defined(USE_IEEE) && !defined(DEBUG)
 466 #define IEEE_0996 0x3f7f0000    /* 0.996 or so */
 467 /* This function/macro is sensitive to precision.  Test very carefully
 468  * if you change it!
 469  */
 470 #define UNCLAMPED_FLOAT_TO_UBYTE(UB, F)                                 \
 471         do {                                                            \
 472            fi_type __tmp;                                               \
 473            __tmp.f = (F);                                               \
 474            if (__tmp.i < 0)                                             \
 475               UB = (GLubyte) 0;                                         \
 476            else if (__tmp.i >= IEEE_0996)                               \
 477               UB = (GLubyte) 255;                                       \
 478            else {                                                       \
 479               __tmp.f = __tmp.f * (255.0F/256.0F) + 32768.0F;           \
 480               UB = (GLubyte) __tmp.i;                                   \
 481            }                                                            \
 482         } while (0)
 483 #define CLAMPED_FLOAT_TO_UBYTE(UB, F)                                   \
 484         do {                                                            \
 485            fi_type __tmp;                                               \
 486            __tmp.f = (F) * (255.0F/256.0F) + 32768.0F;                  \
 487            UB = (GLubyte) __tmp.i;                                      \
 488         } while (0)
 489 #else
 490 #define UNCLAMPED_FLOAT_TO_UBYTE(ub, f) \
 491         ub = ((GLubyte) IROUND(CLAMP((f), 0.0F, 1.0F) * 255.0F))
 492 #define CLAMPED_FLOAT_TO_UBYTE(ub, f) \
 493         ub = ((GLubyte) IROUND((f) * 255.0F))
 494 #endif
 495
 496
 497 /***
 498  *** START_FAST_MATH: Set x86 FPU to faster, 32-bit precision mode (and save
 499  ***                  original mode to a temporary).
 500  *** END_FAST_MATH: Restore x86 FPU to original mode.
 501  ***/
 502 #if defined(__GNUC__) && defined(__i386__)
 503 /*
 504  * Set the x86 FPU control word to guarentee only 32 bits of precision
 505  * are stored in registers.  Allowing the FPU to store more introduces
 506  * differences between situations where numbers are pulled out of memory
 507  * vs. situations where the compiler is able to optimize register usage.
 508  *
 509  * In the worst case, we force the compiler to use a memory access to
 510  * truncate the float, by specifying the 'volatile' keyword.
 511  */
 512 /* Hardware default: All exceptions masked, extended double precision,
 513  * round to nearest (IEEE compliant):
 514  */
 515 #define DEFAULT_X86_FPU         0x037f
 516 /* All exceptions masked, single precision, round to nearest:
 517  */
 518 #define FAST_X86_FPU            0x003f
 519 /* The fldcw instruction will cause any pending FP exceptions to be
 520  * raised prior to entering the block, and we clear any pending
 521  * exceptions before exiting the block.  Hence, asm code has free
 522  * reign over the FPU while in the fast math block.
 523  */
 524 #if defined(NO_FAST_MATH)
 525 #define START_FAST_MATH(x)                                              \
 526 do {                                                                    \
 527    static GLuint mask = DEFAULT_X86_FPU;                                \
 528    __asm__ ( "fnstcw %0" : "=m" (*&(x)) );                              \
 529    __asm__ ( "fldcw %0" : : "m" (mask) );                               \
 530 } while (0)
 531 #else
 532 #define START_FAST_MATH(x)                                              \
 533 do {                                                                    \
 534    static GLuint mask = FAST_X86_FPU;                                   \
 535    __asm__ ( "fnstcw %0" : "=m" (*&(x)) );                              \
 536    __asm__ ( "fldcw %0" : : "m" (mask) );                               \
 537 } while (0)
 538 #endif
 539 /* Restore original FPU mode, and clear any exceptions that may have
 540  * occurred in the FAST_MATH block.
 541  */
 542 #define END_FAST_MATH(x)                                                \
 543 do {                                                                    \
 544    __asm__ ( "fnclex ; fldcw %0" : : "m" (*&(x)) );                     \
 545 } while (0)
 546
 547 #elif defined(__WATCOMC__) && defined(__386__)
 548 #define DEFAULT_X86_FPU         0x037f /* See GCC comments above */
 549 #define FAST_X86_FPU            0x003f /* See GCC comments above */
 550 void _watcom_start_fast_math(unsigned short *x,unsigned short *mask);
 551 #pragma aux _watcom_start_fast_math =                                   \
 552    "fnstcw  word ptr [eax]"                                             \
 553    "fldcw   word ptr [ecx]"                                             \
 554    parm [eax] [ecx]                                                     \
 555    modify exact [];
 556 void _watcom_end_fast_math(unsigned short *x);
 557 #pragma aux _watcom_end_fast_math =                                     \
 558    "fnclex"                                                             \
 559    "fldcw   word ptr [eax]"                                             \
 560    parm [eax]                                                           \
 561    modify exact [];
 562 #if defined(NO_FAST_MATH)
 563 #define START_FAST_MATH(x)                                              \
 564 do {                                                                    \
 565    static GLushort mask = DEFAULT_X86_FPU;                                  \
 566    _watcom_start_fast_math(&x,&mask);                                   \
 567 } while (0)
 568 #else
 569 #define START_FAST_MATH(x)                                              \
 570 do {                                                                    \
 571    static GLushort mask = FAST_X86_FPU;                                 \
 572    _watcom_start_fast_math(&x,&mask);                                   \
 573 } while (0)
 574 #endif
 575 #define END_FAST_MATH(x)  _watcom_end_fast_math(&x)
 576 #else
 577 #define START_FAST_MATH(x)  x = 0
 578 #define END_FAST_MATH(x)  (void)(x)
 579 #endif
 580
 581
 582
 583 /**********************************************************************
 584  * Functions
 585  */
 586
 587 extern void *
 588 _mesa_malloc( size_t bytes );
 589
 590 extern void *
 591 _mesa_calloc( size_t bytes );
 592
 593 extern void
 594 _mesa_free( void *ptr );
 595
 596 extern void *
 597 _mesa_align_malloc( size_t bytes, unsigned long alignment );
 598
 599 extern void *
 600 _mesa_align_calloc( size_t bytes, unsigned long alignment );
 601
 602 extern void
 603 _mesa_align_free( void *ptr );
 604
 605 extern void *
 606 _mesa_exec_malloc( GLuint size );
 607
 608 extern void
 609 _mesa_exec_free( void *addr );
 610
 611 extern void *
 612 _mesa_realloc( void *oldBuffer, size_t oldSize, size_t newSize );
 613
 614 extern void *
 615 _mesa_memcpy( void *dest, const void *src, size_t n );
 616
 617 extern void
 618 _mesa_memset( void *dst, int val, size_t n );
 619
 620 extern void
 621 _mesa_memset16( unsigned short *dst, unsigned short val, size_t n );
 622
 623 extern void
 624 _mesa_bzero( void *dst, size_t n );
 625
 626 extern int
 627 _mesa_memcmp( const void *s1, const void *s2, size_t n );
 628
 629 extern double
 630 _mesa_sin(double a);
 631
 632 extern double
 633 _mesa_cos(double a);
 634
 635 extern float
 636 _mesa_asinf(float x);
 637
 638 extern float
 639 _mesa_atanf(float x);
 640
 641 extern double
 642 _mesa_sqrtd(double x);
 643
 644 extern float
 645 _mesa_sqrtf(float x);
 646
 647 extern float
 648 _mesa_inv_sqrtf(float x);
 649
 650 extern double
 651 _mesa_pow(double x, double y);
 652
 653 extern int
 654 _mesa_ffs(int i);
 655
 656 extern unsigned int
 657 _mesa_bitcount(unsigned int n);
 658
 659 extern GLhalfARB
 660 _mesa_float_to_half(float f);
 661
 662 extern float
 663 _mesa_half_to_float(GLhalfARB h);
 664
 665
 666 extern void *
 667 _mesa_bsearch( const void *key, const void *base, size_t nmemb, size_t size,
 668                int (*compar)(const void *, const void *) );
 669
 670 extern char *
 671 _mesa_getenv( const char *var );
 672
 673 extern char *
 674 _mesa_strstr( const char *haystack, const char *needle );
 675
 676 extern char *
 677 _mesa_strncat( char *dest, const char *src, size_t n );
 678
 679 extern char *
 680 _mesa_strcpy( char *dest, const char *src );
 681
 682 extern char *
 683 _mesa_strncpy( char *dest, const char *src, size_t n );
 684
 685 extern size_t
 686 _mesa_strlen( const char *s );
 687
 688 extern int
 689 _mesa_strcmp( const char *s1, const char *s2 );
 690
 691 extern int
 692 _mesa_strncmp( const char *s1, const char *s2, size_t n );
 693
 694 extern char *
 695 _mesa_strdup( const char *s );
 696
 697 extern int
 698 _mesa_atoi( const char *s );
 699
 700 extern double
 701 _mesa_strtod( const char *s, char **end );
 702
 703 extern int
 704 _mesa_sprintf( char *str, const char *fmt, ... );
 705
 706 extern void
 707 _mesa_printf( const char *fmtString, ... );
 708
 709 extern int
 710 _mesa_vsprintf( char *str, const char *fmt, va_list args );
 711
 712
 713 extern void
 714 _mesa_warning( __GLcontext *gc, const char *fmtString, ... );
 715
 716 extern void
 717 _mesa_problem( const __GLcontext *ctx, const char *fmtString, ... );
 718
 719 extern void
 720 _mesa_error( __GLcontext *ctx, GLenum error, const char *fmtString, ... );
 721
 722 extern void
 723 _mesa_debug( const __GLcontext *ctx, const char *fmtString, ... );
 724
 725 extern void
 726 _mesa_exit( int status );
 727
 728
 729 extern void
 730 _mesa_init_default_imports( __GLimports *imports, void *driverCtx );
 731
 732
 733 #ifdef __cplusplus
 734 }
 735 #endif
 736
 737
 738 #endif /* IMPORTS_H */