reactos/lib/mesa32/src/main/imports.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.2
   4  *
   5  * Copyright (C) 1999-2004  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
  43
  44 #ifdef __cplusplus
  45 extern "C" {
  46 #endif
  47
  48
  49 /**********************************************************************/
  50 /** \name General macros */
  51 /*@{*/
  52
  53 #ifndef NULL
  54 #define NULL 0
  55 #endif
  56
  57 /*@}*/
  58
  59
  60 /**********************************************************************/
  61 /** Memory macros */
  62 /*@{*/
  63
  64 /** Allocate \p BYTES bytes */
  65 #define MALLOC(BYTES)      _mesa_malloc(BYTES)
  66 /** Allocate and zero \p BYTES bytes */
  67 #define CALLOC(BYTES)      _mesa_calloc(BYTES)
  68 /** Allocate a structure of type \p T */
  69 #define MALLOC_STRUCT(T)   (struct T *) _mesa_malloc(sizeof(struct T))
  70 /** Allocate and zero a structure of type \p T */
  71 #define CALLOC_STRUCT(T)   (struct T *) _mesa_calloc(sizeof(struct T))
  72 /** Free memory */
  73 #define FREE(PTR)          _mesa_free(PTR)
  74
  75 /** Allocate \p BYTES aligned at \p N bytes */
  76 #define ALIGN_MALLOC(BYTES, N)     _mesa_align_malloc(BYTES, N)
  77 /** Allocate and zero \p BYTES bytes aligned at \p N bytes */
  78 #define ALIGN_CALLOC(BYTES, N)     _mesa_align_calloc(BYTES, N)
  79 /** Allocate a structure of type \p T aligned at \p N bytes */
  80 #define ALIGN_MALLOC_STRUCT(T, N)  (struct T *) _mesa_align_malloc(sizeof(struct T), N)
  81 /** Allocate and zero a structure of type \p T aligned at \p N bytes */
  82 #define ALIGN_CALLOC_STRUCT(T, N)  (struct T *) _mesa_align_calloc(sizeof(struct T), N)
  83 /** Free aligned memory */
  84 #define ALIGN_FREE(PTR)            _mesa_align_free(PTR)
  85
  86 /** Copy \p BYTES bytes from \p SRC into \p DST */
  87 #define MEMCPY( DST, SRC, BYTES)   _mesa_memcpy(DST, SRC, BYTES)
  88 /** Set \p N bytes in \p DST to \p VAL */
  89 #define MEMSET( DST, VAL, N )      _mesa_memset(DST, VAL, N)
  90
  91 #define MEMSET16( DST, VAL, N )   _mesa_memset16( (DST), (VAL), (size_t) (N) )
  92
  93 /*@}*/
  94
  95
  96 /*
  97  * For GL_ARB_vertex_buffer_object we need to treat vertex array pointers
  98  * as offsets into buffer stores.  Since the vertex array pointer and
  99  * buffer store pointer are both pointers and we need to add them, we use
 100  * this macro.
 101  * Both pointers/offsets are expressed in bytes.
 102  */
 103 #define ADD_POINTERS(A, B)  ( (A) + (unsigned long) (B) )
 104
 105
 106 /**********************************************************************/
 107 /** \name [Pseudo] static array declaration.
 108  *
 109  * MACs and BeOS don't support static larger than 32kb, so ...
 110  */
 111 /*@{*/
 112
 113 /**
 114  * \def DEFARRAY
 115  * Define a [static] unidimensional array
 116  */
 117
 118 /**
 119  * \def DEFMARRAY
 120  * Define a [static] bi-dimensional array
 121  */
 122
 123 /**
 124  * \def DEFMNARRAY
 125  * Define a [static] tri-dimensional array
 126  */
 127
 128 /**
 129  * \def CHECKARRAY
 130  * Verifies a [static] array was properly allocated.
 131  */
 132
 133 /**
 134  * \def UNDEFARRAY
 135  * Undefine (free) a [static] array.
 136  */
 137
 138 #if defined(macintosh) && !defined(__MRC__)
 139 /*extern char *AGLAlloc(int size);*/
 140 /*extern void AGLFree(char* ptr);*/
 141 #  define DEFARRAY(TYPE,NAME,SIZE)                      TYPE *NAME = (TYPE*)_mesa_alloc(sizeof(TYPE)*(SIZE))
 142 #  define DEFMARRAY(TYPE,NAME,SIZE1,SIZE2)              TYPE (*NAME)[SIZE2] = (TYPE(*)[SIZE2])_mesa_alloc(sizeof(TYPE)*(SIZE1)*(SIZE2))
 143 #  define DEFMNARRAY(TYPE,NAME,SIZE1,SIZE2,SIZE3)       TYPE (*NAME)[SIZE2][SIZE3] = (TYPE(*)[SIZE2][SIZE3])_mesa_alloc(sizeof(TYPE)*(SIZE1)*(SIZE2)*(SIZE3))
 144 #  define CHECKARRAY(NAME,CMD)                          do {if (!(NAME)) {CMD;}} while (0)
 145 #  define UNDEFARRAY(NAME)                              do {if ((NAME)) {_mesa_free((char*)NAME);}  }while (0)
 146 #elif defined(__BEOS__)
 147 #  define DEFARRAY(TYPE,NAME,SIZE)                      TYPE *NAME = (TYPE*)_mesa_malloc(sizeof(TYPE)*(SIZE))
 148 #  define DEFMARRAY(TYPE,NAME,SIZE1,SIZE2)              TYPE (*NAME)[SIZE2] = (TYPE(*)[SIZE2])_mesa_malloc(sizeof(TYPE)*(SIZE1)*(SIZE2))
 149 #  define DEFMNARRAY(TYPE,NAME,SIZE1,SIZE2,SIZE3)       TYPE (*NAME)[SIZE2][SIZE3] = (TYPE(*)[SIZE2][SIZE3])_mesa_malloc(sizeof(TYPE)*(SIZE1)*(SIZE2)*(SIZE3))
 150 #  define CHECKARRAY(NAME,CMD)                          do {if (!(NAME)) {CMD;}} while (0)
 151 #  define UNDEFARRAY(NAME)                              do {if ((NAME)) {_mesa_free((char*)NAME);}  }while (0)
 152 #else
 153 #  define DEFARRAY(TYPE,NAME,SIZE)                      TYPE NAME[SIZE]
 154 #  define DEFMARRAY(TYPE,NAME,SIZE1,SIZE2)              TYPE NAME[SIZE1][SIZE2]
 155 #  define DEFMNARRAY(TYPE,NAME,SIZE1,SIZE2,SIZE3)       TYPE NAME[SIZE1][SIZE2][SIZE3]
 156 #  define CHECKARRAY(NAME,CMD)                          do {} while(0)
 157 #  define UNDEFARRAY(NAME)
 158 #endif
 159
 160 /*@}*/
 161
 162
 163 /**********************************************************************/
 164 /** \name External pixel buffer allocation.
 165  *
 166  * If you want Mesa's depth/stencil/accum/etc buffers to be allocated with a
 167  * specialized allocator you can define MESA_EXTERNAL_BUFFERALLOC and implement
 168  * _ext_mesa_alloc_pixelbuffer() _ext_mesa_free_pixelbuffer() in your
 169  * application.
 170  *
 171  * \author
 172  * Contributed by Gerk Huisma (gerk@five-d.demon.nl).
 173  */
 174 /*@{*/
 175
 176 /**
 177  * \def MESA_PBUFFER_ALLOC
 178  * Allocate a pixel buffer.
 179  */
 180
 181 /**
 182  * \def MESA_PBUFFER_FREE
 183  * Free a pixel buffer.
 184  */
 185
 186 #ifdef MESA_EXTERNAL_BUFFERALLOC
 187 extern void *_ext_mesa_alloc_pixelbuffer( unsigned int size );
 188 extern void _ext_mesa_free_pixelbuffer( void *pb );
 189
 190 #define MESA_PBUFFER_ALLOC(BYTES)  (void *) _ext_mesa_alloc_pixelbuffer(BYTES)
 191 #define MESA_PBUFFER_FREE(PTR)     _ext_mesa_free_pixelbuffer(PTR)
 192 #else
 193 /* Default buffer allocation uses the aligned allocation routines: */
 194 #define MESA_PBUFFER_ALLOC(BYTES)  (void *) _mesa_align_malloc(BYTES, 512)
 195 #define MESA_PBUFFER_FREE(PTR)     _mesa_align_free(PTR)
 196 #endif
 197
 198 /*@}*/
 199
 200
 201
 202 /**********************************************************************
 203  * Math macros
 204  */
 205
 206 #define MAX_GLUSHORT    0xffff
 207 #define MAX_GLUINT      0xffffffff
 208
 209 #ifndef M_PI
 210 #define M_PI (3.1415926536)
 211 #endif
 212
 213 /* XXX this is a bit of a hack needed for compilation within XFree86 */
 214 #ifndef FLT_MIN
 215 #define FLT_MIN (1.0e-37)
 216 #endif
 217
 218 /* Degrees to radians conversion: */
 219 #define DEG2RAD (M_PI/180.0)
 220
 221
 222 /***
 223  *** USE_IEEE: Determine if we're using IEEE floating point
 224  ***/
 225 #if defined(__i386__) || defined(__386__) || defined(__sparc__) || \
 226     defined(__s390x__) || defined(__powerpc__) || \
 227     defined(__AMD64__) || \
 228     defined(ia64) || defined(__ia64__) || \
 229     defined(__hppa__) || defined(hpux) || \
 230     defined(__mips) || defined(_MIPS_ARCH) || \
 231     defined(__arm__) || \
 232     (defined(__alpha__) && (defined(__IEEE_FLOAT) || !defined(VMS)))
 233 #define USE_IEEE
 234 #define IEEE_ONE 0x3f800000
 235 #endif
 236
 237
 238 /***
 239  *** SQRTF: single-precision square root
 240  ***/
 241 #if 0 /* _mesa_sqrtf() not accurate enough - temporarily disabled */
 242 #  define SQRTF(X)  _mesa_sqrtf(X)
 243 #elif defined(XFree86LOADER) && defined(IN_MODULE)
 244 #  define SQRTF(X)  (float) xf86sqrt((float) (X))
 245 #else
 246 #  define SQRTF(X)  (float) sqrt((float) (X))
 247 #endif
 248
 249
 250 /***
 251  *** INV_SQRTF: single-precision inverse square root
 252  ***/
 253 #if 0
 254 #define INV_SQRTF(X) _mesa_inv_sqrt(X)
 255 #else
 256 #define INV_SQRTF(X) (1.0F / SQRTF(X))  /* this is faster on a P4 */
 257 #endif
 258
 259
 260 /***
 261  *** LOG2: Log base 2 of float
 262  ***/
 263 #ifdef USE_IEEE
 264 #if 0
 265 /* This is pretty fast, but not accurate enough (only 2 fractional bits).
 266  * Based on code from http://www.stereopsis.com/log2.html
 267  */
 268 static INLINE GLfloat LOG2(GLfloat x)
 269 {
 270    const GLfloat y = x * x * x * x;
 271    const GLuint ix = *((GLuint *) &y);
 272    const GLuint exp = (ix >> 23) & 0xFF;
 273    const GLint log2 = ((GLint) exp) - 127;
 274    return (GLfloat) log2 * (1.0 / 4.0);  /* 4, because of x^4 above */
 275 }
 276 #endif
 277 /* Pretty fast, and accurate.
 278  * Based on code from http://www.flipcode.com/totd/
 279  */
 280 static INLINE GLfloat LOG2(GLfloat val)
 281 {
 282    fi_type num;
 283    GLint log_2;
 284    num.f = val;
 285    log_2 = ((num.i >> 23) & 255) - 128;
 286    num.i &= ~(255 << 23);
 287    num.i += 127 << 23;
 288    num.f = ((-1.0f/3) * num.f + 2) * num.f - 2.0f/3;
 289    return num.f + log_2;
 290 }
 291 #elif defined(XFree86LOADER) && defined(IN_MODULE)
 292 #define LOG2(x) ((GLfloat) (xf86log(x) * 1.442695))
 293 #else
 294 /*
 295  * NOTE: log_base_2(x) = log(x) / log(2)
 296  * NOTE: 1.442695 = 1/log(2).
 297  */
 298 #define LOG2(x)  ((GLfloat) (log(x) * 1.442695F))
 299 #endif
 300
 301
 302 /***
 303  *** IS_INF_OR_NAN: test if float is infinite or NaN
 304  ***/
 305 #ifdef USE_IEEE
 306 static INLINE int IS_INF_OR_NAN( float x )
 307 {
 308    fi_type tmp;
 309    tmp.f = x;
 310    return !(int)((unsigned int)((tmp.i & 0x7fffffff)-0x7f800000) >> 31);
 311 }
 312 #elif defined(isfinite)
 313 #define IS_INF_OR_NAN(x)        (!isfinite(x))
 314 #elif defined(finite)
 315 #define IS_INF_OR_NAN(x)        (!finite(x))
 316 #elif defined(__VMS)
 317 #define IS_INF_OR_NAN(x)        (!finite(x))
 318 #elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
 319 #define IS_INF_OR_NAN(x)        (!isfinite(x))
 320 #else
 321 #define IS_INF_OR_NAN(x)        (!finite(x))
 322 #endif
 323
 324
 325 /***
 326  *** IS_NEGATIVE: test if float is negative
 327  ***/
 328 #if defined(USE_IEEE)
 329 #define GET_FLOAT_BITS(x) ((fi_type *) &(x))->i
 330 #define IS_NEGATIVE(x) (GET_FLOAT_BITS(x) & (1<<31))
 331 #else
 332 #define IS_NEGATIVE(x) (x < 0.0F)
 333 #endif
 334
 335
 336 /***
 337  *** DIFFERENT_SIGNS: test if two floats have opposite signs
 338  ***/
 339 #if defined(USE_IEEE)
 340 #define DIFFERENT_SIGNS(x,y) ((GET_FLOAT_BITS(x) ^ GET_FLOAT_BITS(y)) & (1<<31))
 341 #else
 342 /* Could just use (x*y<0) except for the flatshading requirements.
 343  * Maybe there's a better way?
 344  */
 345 #define DIFFERENT_SIGNS(x,y) ((x) * (y) <= 0.0F && (x) - (y) != 0.0F)
 346 #endif
 347
 348
 349 /***
 350  *** CEILF: ceiling of float
 351  *** FLOORF: floor of float
 352  *** FABSF: absolute value of float
 353  ***/
 354 #if defined(XFree86LOADER) && defined(IN_MODULE)
 355 #define CEILF(x)   ((GLfloat) xf86ceil(x))
 356 #define FLOORF(x)  ((GLfloat) xf86floor(x))
 357 #define FABSF(x)   ((GLfloat) xf86fabs(x))
 358 #elif defined(__gnu_linux__)
 359 /* C99 functions */
 360 #define CEILF(x)   ceilf(x)
 361 #define FLOORF(x)  floorf(x)
 362 #define FABSF(x)   fabsf(x)
 363 #else
 364 #define CEILF(x)   ((GLfloat) ceil(x))
 365 #define FLOORF(x)  ((GLfloat) floor(x))
 366 #define FABSF(x)   ((GLfloat) fabs(x))
 367 #endif
 368
 369
 370 /***
 371  *** IROUND: return (as an integer) float rounded to nearest integer
 372  ***/
 373 #if defined(USE_SPARC_ASM) && defined(__GNUC__) && defined(__sparc__)
 374 static INLINE int iround(float f)
 375 {
 376    int r;
 377    __asm__ ("fstoi %1, %0" : "=f" (r) : "f" (f));
 378    return r;
 379 }
 380 #define IROUND(x)  iround(x)
 381 #elif defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__) && \
 382                         (!defined(__BEOS__) || (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95)))
 383 static INLINE int iround(float f)
 384 {
 385    int r;
 386    __asm__ ("fistpl %0" : "=m" (r) : "t" (f) : "st");
 387    return r;
 388 }
 389 #define IROUND(x)  iround(x)
 390 #elif defined(USE_X86_ASM) && defined(__MSC__) && defined(__WIN32__)
 391 static INLINE int iround(float f)
 392 {
 393    int r;
 394    _asm {
 395          fld f
 396          fistp r
 397         }
 398    return r;
 399 }
 400 #define IROUND(x)  iround(x)
 401 #elif defined(__WATCOMC__) && defined(__386__)
 402 long iround(float f);
 403 #pragma aux iround =                    \
 404         "push   eax"                        \
 405         "fistp  dword ptr [esp]"            \
 406         "pop    eax"                        \
 407         parm [8087]                         \
 408         value [eax]                         \
 409         modify exact [eax];
 410 #define IROUND(x)  iround(x)
 411 #else
 412 #define IROUND(f)  ((int) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))
 413 #endif
 414
 415
 416 /***
 417  *** IROUND_POS: return (as an integer) positive float rounded to nearest int
 418  ***/
 419 #ifdef DEBUG
 420 #define IROUND_POS(f) (assert((f) >= 0.0F), IROUND(f))
 421 #else
 422 #define IROUND_POS(f) (IROUND(f))
 423 #endif
 424
 425
 426 /***
 427  *** IFLOOR: return (as an integer) floor of float
 428  ***/
 429 #if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
 430 /*
 431  * IEEE floor for computers that round to nearest or even.
 432  * 'f' must be between -4194304 and 4194303.
 433  * This floor operation is done by "(iround(f + .5) + iround(f - .5)) >> 1",
 434  * but uses some IEEE specific tricks for better speed.
 435  * Contributed by Josh Vanderhoof
 436  */
 437 static INLINE int ifloor(float f)
 438 {
 439    int ai, bi;
 440    double af, bf;
 441    af = (3 << 22) + 0.5 + (double)f;
 442    bf = (3 << 22) + 0.5 - (double)f;
 443    /* GCC generates an extra fstp/fld without this. */
 444    __asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");
 445    __asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");
 446    return (ai - bi) >> 1;
 447 }
 448 #define IFLOOR(x)  ifloor(x)
 449 #elif defined(USE_IEEE)
 450 static INLINE int ifloor(float f)
 451 {
 452    int ai, bi;
 453    double af, bf;
 454    fi_type u;
 455
 456    af = (3 << 22) + 0.5 + (double)f;
 457    bf = (3 << 22) + 0.5 - (double)f;
 458    u.f = (float) af;  ai = u.i;
 459    u.f = (float) bf;  bi = u.i;
 460    return (ai - bi) >> 1;
 461 }
 462 #define IFLOOR(x)  ifloor(x)
 463 #else
 464 static INLINE int ifloor(float f)
 465 {
 466    int i = IROUND(f);
 467    return (i > f) ? i - 1 : i;
 468 }
 469 #define IFLOOR(x)  ifloor(x)
 470 #endif
 471
 472
 473 /***
 474  *** ICEIL: return (as an integer) ceiling of float
 475  ***/
 476 #if defined(USE_X86_ASM) && defined(__GNUC__) && defined(__i386__)
 477 /*
 478  * IEEE ceil for computers that round to nearest or even.
 479  * 'f' must be between -4194304 and 4194303.
 480  * This ceil operation is done by "(iround(f + .5) + iround(f - .5) + 1) >> 1",
 481  * but uses some IEEE specific tricks for better speed.
 482  * Contributed by Josh Vanderhoof
 483  */
 484 static INLINE int iceil(float f)
 485 {
 486    int ai, bi;
 487    double af, bf;
 488    af = (3 << 22) + 0.5 + (double)f;
 489    bf = (3 << 22) + 0.5 - (double)f;
 490    /* GCC generates an extra fstp/fld without this. */
 491    __asm__ ("fstps %0" : "=m" (ai) : "t" (af) : "st");
 492    __asm__ ("fstps %0" : "=m" (bi) : "t" (bf) : "st");
 493    return (ai - bi + 1) >> 1;
 494 }
 495 #define ICEIL(x)  iceil(x)
 496 #elif defined(USE_IEEE)
 497 static INLINE int iceil(float f)
 498 {
 499    int ai, bi;
 500    double af, bf;
 501    fi_type u;
 502    af = (3 << 22) + 0.5 + (double)f;
 503    bf = (3 << 22) + 0.5 - (double)f;
 504    u.f = (float) af; ai = u.i;
 505    u.f = (float) bf; bi = u.i;
 506    return (ai - bi + 1) >> 1;
 507 }
 508 #define ICEIL(x)  iceil(x)
 509 #else
 510 static INLINE int iceil(float f)
 511 {
 512    int i = IROUND(f);
 513    return (i < f) ? i + 1 : i;
 514 }
 515 #define ICEIL(x)  iceil(x)
 516 #endif
 517
 518
 519 /***
 520  *** UNCLAMPED_FLOAT_TO_UBYTE: clamp float to [0,1] and map to ubyte in [0,255]
 521  *** CLAMPED_FLOAT_TO_UBYTE: map float known to be in [0,1] to ubyte in [0,255]
 522  ***/
 523 #if defined(USE_IEEE) && !defined(DEBUG)
 524 #define IEEE_0996 0x3f7f0000    /* 0.996 or so */
 525 /* This function/macro is sensitive to precision.  Test very carefully
 526  * if you change it!
 527  */
 528 #define UNCLAMPED_FLOAT_TO_UBYTE(UB, F)                                 \
 529         do {                                                            \
 530            fi_type __tmp;                                               \
 531            __tmp.f = (F);                                               \
 532            if (__tmp.i < 0)                                             \
 533               UB = (GLubyte) 0;                                         \
 534            else if (__tmp.i >= IEEE_0996)                               \
 535               UB = (GLubyte) 255;                                       \
 536            else {                                                       \
 537               __tmp.f = __tmp.f * (255.0F/256.0F) + 32768.0F;           \
 538               UB = (GLubyte) __tmp.i;                                   \
 539            }                                                            \
 540         } while (0)
 541 #define CLAMPED_FLOAT_TO_UBYTE(UB, F)                                   \
 542         do {                                                            \
 543            fi_type __tmp;                                               \
 544            __tmp.f = (F) * (255.0F/256.0F) + 32768.0F;                  \
 545            UB = (GLubyte) __tmp.i;                                      \
 546         } while (0)
 547 #else
 548 #define UNCLAMPED_FLOAT_TO_UBYTE(ub, f) \
 549         ub = ((GLubyte) IROUND(CLAMP((f), 0.0F, 1.0F) * 255.0F))
 550 #define CLAMPED_FLOAT_TO_UBYTE(ub, f) \
 551         ub = ((GLubyte) IROUND((f) * 255.0F))
 552 #endif
 553
 554
 555 /***
 556  *** COPY_FLOAT: copy a float from src to dest, avoid slow FP regs if possible
 557  ***/
 558 #if defined(USE_IEEE) && !defined(DEBUG)
 559 #define COPY_FLOAT( dst, src )                                  \
 560         ((fi_type *) &(dst))->i = ((fi_type *) (void *) &(src))->i
 561 #else
 562 #define COPY_FLOAT( dst, src )          (dst) = (src)
 563 #endif
 564
 565
 566 /***
 567  *** START_FAST_MATH: Set x86 FPU to faster, 32-bit precision mode (and save
 568  ***                  original mode to a temporary).
 569  *** END_FAST_MATH: Restore x86 FPU to original mode.
 570  ***/
 571 #if defined(__GNUC__) && defined(__i386__)
 572 /*
 573  * Set the x86 FPU control word to guarentee only 32 bits of precision
 574  * are stored in registers.  Allowing the FPU to store more introduces
 575  * differences between situations where numbers are pulled out of memory
 576  * vs. situations where the compiler is able to optimize register usage.
 577  *
 578  * In the worst case, we force the compiler to use a memory access to
 579  * truncate the float, by specifying the 'volatile' keyword.
 580  */
 581 /* Hardware default: All exceptions masked, extended double precision,
 582  * round to nearest (IEEE compliant):
 583  */
 584 #define DEFAULT_X86_FPU         0x037f
 585 /* All exceptions masked, single precision, round to nearest:
 586  */
 587 #define FAST_X86_FPU            0x003f
 588 /* The fldcw instruction will cause any pending FP exceptions to be
 589  * raised prior to entering the block, and we clear any pending
 590  * exceptions before exiting the block.  Hence, asm code has free
 591  * reign over the FPU while in the fast math block.
 592  */
 593 #if defined(NO_FAST_MATH)
 594 #define START_FAST_MATH(x)                                              \
 595 do {                                                                    \
 596    static GLuint mask = DEFAULT_X86_FPU;                                \
 597    __asm__ ( "fnstcw %0" : "=m" (*&(x)) );                              \
 598    __asm__ ( "fldcw %0" : : "m" (mask) );                               \
 599 } while (0)
 600 #else
 601 #define START_FAST_MATH(x)                                              \
 602 do {                                                                    \
 603    static GLuint mask = FAST_X86_FPU;                                   \
 604    __asm__ ( "fnstcw %0" : "=m" (*&(x)) );                              \
 605    __asm__ ( "fldcw %0" : : "m" (mask) );                               \
 606 } while (0)
 607 #endif
 608 /* Restore original FPU mode, and clear any exceptions that may have
 609  * occurred in the FAST_MATH block.
 610  */
 611 #define END_FAST_MATH(x)                                                \
 612 do {                                                                    \
 613    __asm__ ( "fnclex ; fldcw %0" : : "m" (*&(x)) );                     \
 614 } while (0)
 615
 616 #elif defined(__WATCOMC__) && defined(__386__)
 617 #define DEFAULT_X86_FPU         0x037f /* See GCC comments above */
 618 #define FAST_X86_FPU            0x003f /* See GCC comments above */
 619 void _watcom_start_fast_math(unsigned short *x,unsigned short *mask);
 620 #pragma aux _watcom_start_fast_math =                                   \
 621    "fnstcw  word ptr [eax]"                                             \
 622    "fldcw   word ptr [ecx]"                                             \
 623    parm [eax] [ecx]                                                     \
 624    modify exact [];
 625 void _watcom_end_fast_math(unsigned short *x);
 626 #pragma aux _watcom_end_fast_math =                                     \
 627    "fnclex"                                                             \
 628    "fldcw   word ptr [eax]"                                             \
 629    parm [eax]                                                           \
 630    modify exact [];
 631 #if defined(NO_FAST_MATH)
 632 #define START_FAST_MATH(x)                                              \
 633 do {                                                                    \
 634    static GLushort mask = DEFAULT_X86_FPU;                                  \
 635    _watcom_start_fast_math(&x,&mask);                                   \
 636 } while (0)
 637 #else
 638 #define START_FAST_MATH(x)                                              \
 639 do {                                                                    \
 640    static GLushort mask = FAST_X86_FPU;                                 \
 641    _watcom_start_fast_math(&x,&mask);                                   \
 642 } while (0)
 643 #endif
 644 #define END_FAST_MATH(x)  _watcom_end_fast_math(&x)
 645 #else
 646 #define START_FAST_MATH(x)  x = 0
 647 #define END_FAST_MATH(x)  (void)(x)
 648 #endif
 649
 650
 651
 652 /**********************************************************************
 653  * Functions
 654  */
 655
 656 extern void *
 657 _mesa_malloc( size_t bytes );
 658
 659 extern void *
 660 _mesa_calloc( size_t bytes );
 661
 662 extern void
 663 _mesa_free( void *ptr );
 664
 665 extern void *
 666 _mesa_align_malloc( size_t bytes, unsigned long alignment );
 667
 668 extern void *
 669 _mesa_align_calloc( size_t bytes, unsigned long alignment );
 670
 671 extern void
 672 _mesa_align_free( void *ptr );
 673
 674 extern void *
 675 _mesa_realloc( void *oldBuffer, size_t oldSize, size_t newSize );
 676
 677 extern void *
 678 _mesa_memcpy( void *dest, const void *src, size_t n );
 679
 680 extern void
 681 _mesa_memset( void *dst, int val, size_t n );
 682
 683 extern void
 684 _mesa_memset16( unsigned short *dst, unsigned short val, size_t n );
 685
 686 extern void
 687 _mesa_bzero( void *dst, size_t n );
 688
 689
 690 extern double
 691 _mesa_sin(double a);
 692
 693 extern double
 694 _mesa_cos(double a);
 695
 696 extern double
 697 _mesa_sqrtd(double x);
 698
 699 extern float
 700 _mesa_sqrtf(float x);
 701
 702 extern float
 703 _mesa_inv_sqrtf(float x);
 704
 705 extern double
 706 _mesa_pow(double x, double y);
 707
 708 extern float
 709 _mesa_log2(float x);
 710
 711 extern unsigned int
 712 _mesa_bitcount(unsigned int n);
 713
 714 extern GLhalfARB
 715 _mesa_float_to_half(float f);
 716
 717 extern float
 718 _mesa_half_to_float(GLhalfARB h);
 719
 720
 721 extern char *
 722 _mesa_getenv( const char *var );
 723
 724 extern char *
 725 _mesa_strstr( const char *haystack, const char *needle );
 726
 727 extern char *
 728 _mesa_strncat( char *dest, const char *src, size_t n );
 729
 730 extern char *
 731 _mesa_strcpy( char *dest, const char *src );
 732
 733 extern char *
 734 _mesa_strncpy( char *dest, const char *src, size_t n );
 735
 736 extern size_t
 737 _mesa_strlen( const char *s );
 738
 739 extern int
 740 _mesa_strcmp( const char *s1, const char *s2 );
 741
 742 extern int
 743 _mesa_strncmp( const char *s1, const char *s2, size_t n );
 744
 745 extern char *
 746 _mesa_strdup( const char *s );
 747
 748 extern int
 749 _mesa_atoi( const char *s );
 750
 751 extern double
 752 _mesa_strtod( const char *s, char **end );
 753
 754 extern int
 755 _mesa_sprintf( char *str, const char *fmt, ... );
 756
 757 extern void
 758 _mesa_printf( const char *fmtString, ... );
 759
 760
 761 extern void
 762 _mesa_warning( __GLcontext *gc, const char *fmtString, ... );
 763
 764 extern void
 765 _mesa_problem( const __GLcontext *ctx, const char *fmtString, ... );
 766
 767 extern void
 768 _mesa_error( __GLcontext *ctx, GLenum error, const char *fmtString, ... );
 769
 770 extern void
 771 _mesa_debug( const __GLcontext *ctx, const char *fmtString, ... );
 772
 773
 774 extern void
 775 _mesa_init_default_imports( __GLimports *imports, void *driverCtx );
 776
 777
 778 #ifdef __cplusplus
 779 }
 780 #endif
 781
 782
 783 #endif /* IMPORTS_H */