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  1. /*
  2.  * Mesa 3-D graphics library
  3.  * Version:  6.1
  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.  * 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 "main/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 = (GLfloat *) _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 = _mesa_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 */
  340.