src/mesa/math/m_debug_xform.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2004  Brian Paul   All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /*
  26  * Updated for P6 architecture by Gareth Hughes.
  27  */
  28
  29 #include "main/glheader.h"
  30 #include "main/context.h"
  31 #include "main/macros.h"
  32 #include "util/imports.h"
  33
  34 #include "m_matrix.h"
  35 #include "m_xform.h"
  36
  37 #include "m_debug.h"
  38 #include "m_debug_util.h"
  39
  40 #ifdef __UNIXOS2__
  41 /* The linker doesn't like empty files */
  42 static char dummy;
  43 #endif
  44
  45 #ifdef DEBUG_MATH  /* This code only used for debugging */
  46
  47
  48 /* Overhead of profiling counter in cycles.  Automatically adjusted to
  49  * your machine at run time - counter initialization should give very
  50  * consistent results.
  51  */
  52 long counter_overhead = 0;
  53
  54 /* This is the value of the environment variable MESA_PROFILE, and is
  55  * used to determine if we should benchmark the functions as well as
  56  * verify their correctness.
  57  */
  58 char *mesa_profile = NULL;
  59
  60
  61 static int m_general[16] = {
  62    VAR, VAR, VAR, VAR,
  63    VAR, VAR, VAR, VAR,
  64    VAR, VAR, VAR, VAR,
  65    VAR, VAR, VAR, VAR
  66 };
  67 static int m_identity[16] = {
  68    ONE, NIL, NIL, NIL,
  69    NIL, ONE, NIL, NIL,
  70    NIL, NIL, ONE, NIL,
  71    NIL, NIL, NIL, ONE
  72 };
  73 static int  m_2d[16]  = {
  74    VAR, VAR, NIL, VAR,
  75    VAR, VAR, NIL, VAR,
  76    NIL, NIL, ONE, NIL,
  77    NIL, NIL, NIL, ONE
  78 };
  79 static int m_2d_no_rot[16] = {
  80    VAR, NIL, NIL, VAR,
  81    NIL, VAR, NIL, VAR,
  82    NIL, NIL, ONE, NIL,
  83    NIL, NIL, NIL, ONE
  84 };
  85 static int m_3d[16] = {
  86    VAR, VAR, VAR, VAR,
  87    VAR, VAR, VAR, VAR,
  88    VAR, VAR, VAR, VAR,
  89    NIL, NIL, NIL, ONE
  90 };
  91 static int m_3d_no_rot[16] = {
  92    VAR, NIL, NIL, VAR,
  93    NIL, VAR, NIL, VAR,
  94    NIL, NIL, VAR, VAR,
  95    NIL, NIL, NIL, ONE
  96 };
  97 static int m_perspective[16] = {
  98    VAR, NIL, VAR, NIL,
  99    NIL, VAR, VAR, NIL,
 100    NIL, NIL, VAR, VAR,
 101    NIL, NIL, NEG, NIL
 102 };
 103 static int *templates[7] = {
 104    m_general,
 105    m_identity,
 106    m_3d_no_rot,
 107    m_perspective,
 108    m_2d,
 109    m_2d_no_rot,
 110    m_3d
 111 };
 112 static enum GLmatrixtype mtypes[7] = {
 113    MATRIX_GENERAL,
 114    MATRIX_IDENTITY,
 115    MATRIX_3D_NO_ROT,
 116    MATRIX_PERSPECTIVE,
 117    MATRIX_2D,
 118    MATRIX_2D_NO_ROT,
 119    MATRIX_3D
 120 };
 121 static char *mstrings[7] = {
 122    "MATRIX_GENERAL",
 123    "MATRIX_IDENTITY",
 124    "MATRIX_3D_NO_ROT",
 125    "MATRIX_PERSPECTIVE",
 126    "MATRIX_2D",
 127    "MATRIX_2D_NO_ROT",
 128    "MATRIX_3D"
 129 };
 130
 131
 132 /* =============================================================
 133  * Reference transformations
 134  */
 135
 136 static void ref_transform( GLvector4f *dst,
 137                            const GLmatrix *mat,
 138                            const GLvector4f *src )
 139 {
 140    GLuint i;
 141    GLfloat *s = (GLfloat *)src->start;
 142    GLfloat (*d)[4] = (GLfloat (*)[4])dst->start;
 143    const GLfloat *m = mat->m;
 144
 145    for ( i = 0 ; i < src->count ; i++ ) {
 146       TRANSFORM_POINT( d[i], m, s );
 147       s = (GLfloat *)((char *)s + src->stride);
 148    }
 149 }
 150
 151
 152 /* =============================================================
 153  * Vertex transformation tests
 154  */
 155
 156 static void init_matrix( GLfloat *m )
 157 {
 158    m[0] = 63.0; m[4] = 43.0; m[ 8] = 29.0; m[12] = 43.0;
 159    m[1] = 55.0; m[5] = 17.0; m[ 9] = 31.0; m[13] =  7.0;
 160    m[2] = 44.0; m[6] =  9.0; m[10] =  7.0; m[14] =  3.0;
 161    m[3] = 11.0; m[7] = 23.0; m[11] = 91.0; m[15] =  9.0;
 162 }
 163
 164 ALIGN16(static GLfloat, s[TEST_COUNT][4]);
 165 ALIGN16(static GLfloat, d[TEST_COUNT][4]);
 166 ALIGN16(static GLfloat, r[TEST_COUNT][4]);
 167
 168 static int test_transform_function( transform_func func, int psize,
 169                                     int mtype, unsigned long *cycles )
 170 {
 171    GLvector4f source[1], dest[1], ref[1];
 172    GLmatrix mat[1];
 173    GLfloat *m;
 174    int i, j;
 175 #ifdef  RUN_DEBUG_BENCHMARK
 176    int cycle_i;                /* the counter for the benchmarks we run */
 177 #endif
 178
 179    (void) cycles;
 180
 181    if ( psize > 4 ) {
 182       _mesa_problem( NULL, "test_transform_function called with psize > 4\n" );
 183       return 0;
 184    }
 185
 186    mat->m = _mesa_align_malloc( 16 * sizeof(GLfloat), 16 );
 187    mat->type = mtypes[mtype];
 188
 189    m = mat->m;
 190    assert( ((long)m & 15) == 0 );
 191
 192    init_matrix( m );
 193
 194    for ( i = 0 ; i < 4 ; i++ ) {
 195       for ( j = 0 ; j < 4 ; j++ ) {
 196          switch ( templates[mtype][i * 4 + j] ) {
 197          case NIL:
 198             m[j * 4 + i] = 0.0;
 199             break;
 200          case ONE:
 201             m[j * 4 + i] = 1.0;
 202             break;
 203          case NEG:
 204             m[j * 4 + i] = -1.0;
 205             break;
 206          case VAR:
 207             break;
 208          default:
 209             assert(0);
 210             return 0;
 211          }
 212       }
 213    }
 214
 215    for ( i = 0 ; i < TEST_COUNT ; i++) {
 216       ASSIGN_4V( d[i], 0.0, 0.0, 0.0, 1.0 );
 217       ASSIGN_4V( s[i], 0.0, 0.0, 0.0, 1.0 );
 218       for ( j = 0 ; j < psize ; j++ )
 219          s[i][j] = rnd();
 220    }
 221
 222    source->data = (GLfloat(*)[4])s;
 223    source->start = (GLfloat *)s;
 224    source->count = TEST_COUNT;
 225    source->stride = sizeof(s[0]);
 226    source->size = 4;
 227    source->flags = 0;
 228
 229    dest->data = (GLfloat(*)[4])d;
 230    dest->start = (GLfloat *)d;
 231    dest->count = TEST_COUNT;
 232    dest->stride = sizeof(float[4]);
 233    dest->size = 0;
 234    dest->flags = 0;
 235
 236    ref->data = (GLfloat(*)[4])r;
 237    ref->start = (GLfloat *)r;
 238    ref->count = TEST_COUNT;
 239    ref->stride = sizeof(float[4]);
 240    ref->size = 0;
 241    ref->flags = 0;
 242
 243    ref_transform( ref, mat, source );
 244
 245    if ( mesa_profile ) {
 246       BEGIN_RACE( *cycles );
 247       func( dest, mat->m, source );
 248       END_RACE( *cycles );
 249    }
 250    else {
 251       func( dest, mat->m, source );
 252    }
 253
 254    for ( i = 0 ; i < TEST_COUNT ; i++ ) {
 255       for ( j = 0 ; j < 4 ; j++ ) {
 256          if ( significand_match( d[i][j], r[i][j] ) < REQUIRED_PRECISION ) {
 257             printf("-----------------------------\n" );
 258             printf("(i = %i, j = %i)\n", i, j );
 259             printf("%f \t %f \t [diff = %e - %i bit missed]\n",
 260                     d[i][0], r[i][0], r[i][0]-d[i][0],
 261                     MAX_PRECISION - significand_match( d[i][0], r[i][0] ) );
 262             printf("%f \t %f \t [diff = %e - %i bit missed]\n",
 263                     d[i][1], r[i][1], r[i][1]-d[i][1],
 264                     MAX_PRECISION - significand_match( d[i][1], r[i][1] ) );
 265             printf("%f \t %f \t [diff = %e - %i bit missed]\n",
 266                     d[i][2], r[i][2], r[i][2]-d[i][2],
 267                     MAX_PRECISION - significand_match( d[i][2], r[i][2] ) );
 268             printf("%f \t %f \t [diff = %e - %i bit missed]\n",
 269                     d[i][3], r[i][3], r[i][3]-d[i][3],
 270                     MAX_PRECISION - significand_match( d[i][3], r[i][3] ) );
 271             return 0;
 272          }
 273       }
 274    }
 275
 276    _mesa_align_free( mat->m );
 277    return 1;
 278 }
 279
 280 void _math_test_all_transform_functions( char *description )
 281 {
 282    int psize, mtype;
 283    unsigned long benchmark_tab[4][7];
 284    static int first_time = 1;
 285
 286    if ( first_time ) {
 287       first_time = 0;
 288       mesa_profile = getenv( "MESA_PROFILE" );
 289    }
 290
 291 #ifdef RUN_DEBUG_BENCHMARK
 292    if ( mesa_profile ) {
 293       if ( !counter_overhead ) {
 294          INIT_COUNTER();
 295          printf("counter overhead: %lu cycles\n\n", counter_overhead );
 296       }
 297       printf("transform results after hooking in %s functions:\n", description );
 298    }
 299 #endif
 300
 301 #ifdef RUN_DEBUG_BENCHMARK
 302    if ( mesa_profile ) {
 303       printf("\n" );
 304       for ( psize = 1 ; psize <= 4 ; psize++ ) {
 305          printf(" p%d\t", psize );
 306       }
 307       printf("\n--------------------------------------------------------\n" );
 308    }
 309 #endif
 310
 311    for ( mtype = 0 ; mtype < 7 ; mtype++ ) {
 312       for ( psize = 1 ; psize <= 4 ; psize++ ) {
 313          transform_func func = _mesa_transform_tab[psize][mtypes[mtype]];
 314          unsigned long *cycles = &(benchmark_tab[psize-1][mtype]);
 315
 316          if ( test_transform_function( func, psize, mtype, cycles ) == 0 ) {
 317             char buf[100];
 318             sprintf(buf, "_mesa_transform_tab[0][%d][%s] failed test (%s)",
 319                     psize, mstrings[mtype], description );
 320             _mesa_problem( NULL, "%s", buf );
 321          }
 322 #ifdef RUN_DEBUG_BENCHMARK
 323          if ( mesa_profile )
 324             printf(" %li\t", benchmark_tab[psize-1][mtype] );
 325 #endif
 326       }
 327 #ifdef RUN_DEBUG_BENCHMARK
 328       if ( mesa_profile )
 329          printf(" | [%s]\n", mstrings[mtype] );
 330 #endif
 331    }
 332 #ifdef RUN_DEBUG_BENCHMARK
 333    if ( mesa_profile )
 334       printf( "\n" );
 335 #endif
 336 }
 337
 338
 339 #endif /* DEBUG_MATH */