src/mesa/math/m_debug_xform.c

   1 /* $Id: m_debug_xform.c,v 1.9 2002/06/29 19:48:17 brianp Exp $ */
   2
   3 /*
   4  * Mesa 3-D graphics library
   5  * Version:  3.5
   6  *
   7  * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining a
  10  * copy of this software and associated documentation files (the "Software"),
  11  * to deal in the Software without restriction, including without limitation
  12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  13  * and/or sell copies of the Software, and to permit persons to whom the
  14  * Software is furnished to do so, subject to the following conditions:
  15  *
  16  * The above copyright notice and this permission notice shall be included
  17  * in all copies or substantial portions of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  23  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27 /*
  28  * Updated for P6 architecture by Gareth Hughes.
  29  */
  30
  31 #include "glheader.h"
  32 #include "context.h"
  33 #include "macros.h"
  34 #include "mem.h"
  35
  36 #include "m_matrix.h"
  37 #include "m_xform.h"
  38
  39 #include "m_debug.h"
  40 #include "m_debug_util.h"
  41
  42 #ifdef DEBUG  /* This code only used for debugging */
  43
  44
  45 /* Overhead of profiling counter in cycles.  Automatically adjusted to
  46  * your machine at run time - counter initialization should give very
  47  * consistent results.
  48  */
  49 long counter_overhead = 0;
  50
  51 /* This is the value of the environment variable MESA_PROFILE, and is
  52  * used to determine if we should benchmark the functions as well as
  53  * verify their correctness.
  54  */
  55 char *mesa_profile = NULL;
  56
  57
  58 static int m_general[16] = {
  59    VAR, VAR, VAR, VAR,
  60    VAR, VAR, VAR, VAR,
  61    VAR, VAR, VAR, VAR,
  62    VAR, VAR, VAR, VAR
  63 };
  64 static int m_identity[16] = {
  65    ONE, NIL, NIL, NIL,
  66    NIL, ONE, NIL, NIL,
  67    NIL, NIL, ONE, NIL,
  68    NIL, NIL, NIL, ONE
  69 };
  70 static int  m_2d[16]  = {
  71    VAR, VAR, NIL, VAR,
  72    VAR, VAR, NIL, VAR,
  73    NIL, NIL, ONE, NIL,
  74    NIL, NIL, NIL, ONE
  75 };
  76 static int m_2d_no_rot[16] = {
  77    VAR, NIL, NIL, VAR,
  78    NIL, VAR, NIL, VAR,
  79    NIL, NIL, ONE, NIL,
  80    NIL, NIL, NIL, ONE
  81 };
  82 static int m_3d[16] = {
  83    VAR, VAR, VAR, VAR,
  84    VAR, VAR, VAR, VAR,
  85    VAR, VAR, VAR, VAR,
  86    NIL, NIL, NIL, ONE
  87 };
  88 static int m_3d_no_rot[16] = {
  89    VAR, NIL, NIL, VAR,
  90    NIL, VAR, NIL, VAR,
  91    NIL, NIL, VAR, VAR,
  92    NIL, NIL, NIL, ONE
  93 };
  94 static int m_perspective[16] = {
  95    VAR, NIL, VAR, NIL,
  96    NIL, VAR, VAR, NIL,
  97    NIL, NIL, VAR, VAR,
  98    NIL, NIL, NEG, NIL
  99 };
 100 static int *templates[7] = {
 101    m_general,
 102    m_identity,
 103    m_3d_no_rot,
 104    m_perspective,
 105    m_2d,
 106    m_2d_no_rot,
 107    m_3d
 108 };
 109 static int mtypes[7] = {
 110    MATRIX_GENERAL,
 111    MATRIX_IDENTITY,
 112    MATRIX_3D_NO_ROT,
 113    MATRIX_PERSPECTIVE,
 114    MATRIX_2D,
 115    MATRIX_2D_NO_ROT,
 116    MATRIX_3D
 117 };
 118 static char *mstrings[7] = {
 119    "MATRIX_GENERAL",
 120    "MATRIX_IDENTITY",
 121    "MATRIX_3D_NO_ROT",
 122    "MATRIX_PERSPECTIVE",
 123    "MATRIX_2D",
 124    "MATRIX_2D_NO_ROT",
 125    "MATRIX_3D"
 126 };
 127
 128
 129 /* =============================================================
 130  * Reference transformations
 131  */
 132
 133 static void ref_transform( GLvector4f *dst,
 134                            const GLmatrix *mat,
 135                            const GLvector4f *src )
 136 {
 137    GLuint i;
 138    GLfloat *s = (GLfloat *)src->start;
 139    GLfloat (*d)[4] = (GLfloat (*)[4])dst->start;
 140    const GLfloat *m = mat->m;
 141
 142    for ( i = 0 ; i < src->count ; i++ ) {
 143       TRANSFORM_POINT( d[i], m, s );
 144       s = (GLfloat *)((char *)s + src->stride);
 145    }
 146 }
 147
 148
 149 /* =============================================================
 150  * Vertex transformation tests
 151  */
 152
 153 static void init_matrix( GLfloat *m )
 154 {
 155    m[0] = 63.0; m[4] = 43.0; m[ 8] = 29.0; m[12] = 43.0;
 156    m[1] = 55.0; m[5] = 17.0; m[ 9] = 31.0; m[13] =  7.0;
 157    m[2] = 44.0; m[6] =  9.0; m[10] =  7.0; m[14] =  3.0;
 158    m[3] = 11.0; m[7] = 23.0; m[11] = 91.0; m[15] =  9.0;
 159 }
 160
 161 static GLfloat s[TEST_COUNT][4] ALIGN16;
 162 static GLfloat d[TEST_COUNT][4] ALIGN16;
 163 static GLfloat r[TEST_COUNT][4] ALIGN16;
 164
 165 static int test_transform_function( transform_func func, int psize,
 166                                     int mtype, long *cycles )
 167 {
 168    GLvector4f source[1], dest[1], ref[1];
 169    GLmatrix mat[1];
 170    GLfloat *m;
 171    int i, j;
 172 #ifdef  RUN_DEBUG_BENCHMARK
 173    int cycle_i;                /* the counter for the benchmarks we run */
 174 #endif
 175
 176    (void) cycles;
 177
 178    if ( psize > 4 ) {
 179       _mesa_problem( NULL, "test_transform_function called with psize > 4\n" );
 180       return 0;
 181    }
 182
 183    mat->m = (GLfloat *) ALIGN_MALLOC( 16 * sizeof(GLfloat), 16 );
 184    mat->type = mtypes[mtype];
 185
 186    m = mat->m;
 187    ASSERT( ((GLuint)m & 15) == 0 );
 188
 189    init_matrix( m );
 190
 191    for ( i = 0 ; i < 4 ; i++ ) {
 192       for ( j = 0 ; j < 4 ; j++ ) {
 193          switch ( templates[mtype][i * 4 + j] ) {
 194          case NIL:
 195             m[j * 4 + i] = 0.0;
 196             break;
 197          case ONE:
 198             m[j * 4 + i] = 1.0;
 199             break;
 200          case NEG:
 201             m[j * 4 + i] = -1.0;
 202             break;
 203          case VAR:
 204             break;
 205          default:
 206             abort();
 207          }
 208       }
 209    }
 210
 211    for ( i = 0 ; i < TEST_COUNT ; i++) {
 212       ASSIGN_4V( d[i], 0.0, 0.0, 0.0, 1.0 );
 213       ASSIGN_4V( s[i], 0.0, 0.0, 0.0, 1.0 );
 214       for ( j = 0 ; j < psize ; j++ )
 215          s[i][j] = rnd();
 216    }
 217
 218    source->data = (GLfloat(*)[4])s;
 219    source->start = (GLfloat *)s;
 220    source->count = TEST_COUNT;
 221    source->stride = sizeof(s[0]);
 222    source->size = 4;
 223    source->flags = 0;
 224
 225    dest->data = (GLfloat(*)[4])d;
 226    dest->start = (GLfloat *)d;
 227    dest->count = TEST_COUNT;
 228    dest->stride = sizeof(float[4]);
 229    dest->size = 0;
 230    dest->flags = 0;
 231
 232    ref->data = (GLfloat(*)[4])r;
 233    ref->start = (GLfloat *)r;
 234    ref->count = TEST_COUNT;
 235    ref->stride = sizeof(float[4]);
 236    ref->size = 0;
 237    ref->flags = 0;
 238
 239    ref_transform( ref, mat, source );
 240
 241    if ( mesa_profile ) {
 242       BEGIN_RACE( *cycles );
 243       func( dest, mat->m, source );
 244       END_RACE( *cycles );
 245    }
 246    else {
 247       func( dest, mat->m, source );
 248    }
 249
 250    for ( i = 0 ; i < TEST_COUNT ; i++ ) {
 251       for ( j = 0 ; j < 4 ; j++ ) {
 252          if ( significand_match( d[i][j], r[i][j] ) < REQUIRED_PRECISION ) {
 253             _mesa_printf(NULL, "-----------------------------\n" );
 254             _mesa_printf(NULL, "(i = %i, j = %i)\n", i, j );
 255             _mesa_printf(NULL, "%f \t %f \t [diff = %e - %i bit missed]\n",
 256                     d[i][0], r[i][0], r[i][0]-d[i][0],
 257                     MAX_PRECISION - significand_match( d[i][0], r[i][0] ) );
 258             _mesa_printf(NULL, "%f \t %f \t [diff = %e - %i bit missed]\n",
 259                     d[i][1], r[i][1], r[i][1]-d[i][1],
 260                     MAX_PRECISION - significand_match( d[i][1], r[i][1] ) );
 261             _mesa_printf(NULL, "%f \t %f \t [diff = %e - %i bit missed]\n",
 262                     d[i][2], r[i][2], r[i][2]-d[i][2],
 263                     MAX_PRECISION - significand_match( d[i][2], r[i][2] ) );
 264             _mesa_printf(NULL, "%f \t %f \t [diff = %e - %i bit missed]\n",
 265                     d[i][3], r[i][3], r[i][3]-d[i][3],
 266                     MAX_PRECISION - significand_match( d[i][3], r[i][3] ) );
 267             return 0;
 268          }
 269       }
 270    }
 271
 272    ALIGN_FREE( mat->m );
 273    return 1;
 274 }
 275
 276 void _math_test_all_transform_functions( char *description )
 277 {
 278    int psize, mtype;
 279    long benchmark_tab[4][7];
 280    static int first_time = 1;
 281
 282    if ( first_time ) {
 283       first_time = 0;
 284       mesa_profile = getenv( "MESA_PROFILE" );
 285    }
 286
 287 #ifdef RUN_DEBUG_BENCHMARK
 288    if ( mesa_profile ) {
 289       if ( !counter_overhead ) {
 290          INIT_COUNTER();
 291          _mesa_printf(NULL, "counter overhead: %ld cycles\n\n", counter_overhead );
 292       }
 293       _mesa_printf(NULL, "transform results after hooking in %s functions:\n", description );
 294    }
 295 #endif
 296
 297 #ifdef RUN_DEBUG_BENCHMARK
 298    if ( mesa_profile ) {
 299       _mesa_printf(NULL, "\n" );
 300       for ( psize = 1 ; psize <= 4 ; psize++ ) {
 301          _mesa_printf(NULL, " p%d\t", psize );
 302       }
 303       _mesa_printf(NULL, "\n--------------------------------------------------------\n" );
 304    }
 305 #endif
 306
 307    for ( mtype = 0 ; mtype < 7 ; mtype++ ) {
 308       for ( psize = 1 ; psize <= 4 ; psize++ ) {
 309          transform_func func = _mesa_transform_tab[psize][mtypes[mtype]];
 310          long *cycles = &(benchmark_tab[psize-1][mtype]);
 311
 312          if ( test_transform_function( func, psize, mtype, cycles ) == 0 ) {
 313             char buf[100];
 314             _mesa_sprintf(NULL, buf, "_mesa_transform_tab[0][%d][%s] failed test (%s)",
 315                      psize, mstrings[mtype], description );
 316             _mesa_problem( NULL, buf );
 317          }
 318 #ifdef RUN_DEBUG_BENCHMARK
 319          if ( mesa_profile )
 320             _mesa_printf(NULL, " %li\t", benchmark_tab[psize-1][mtype] );
 321 #endif
 322       }
 323 #ifdef RUN_DEBUG_BENCHMARK
 324       if ( mesa_profile )
 325          _mesa_printf(NULL, " | [%s]\n", mstrings[mtype] );
 326 #endif
 327    }
 328 #ifdef RUN_DEBUG_BENCHMARK
 329    if ( mesa_profile )
 330       _mesa_printf(NULL, "\n" );
 331 #endif
 332 }
 333
 334
 335 #endif /* DEBUG */