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134 giacomo 1
/* $Id: m_xform_debug.c,v 1.1 2003-04-24 13:37:47 giacomo 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
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 * 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
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 * 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 "imports.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,
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   m_perspective,
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   m_2d,
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   m_2d_no_rot,
107
   m_3d
108
};
109
static int mtypes[7] = {
110
   MATRIX_GENERAL,
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   MATRIX_IDENTITY,
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   MATRIX_3D_NO_ROT,
113
   MATRIX_PERSPECTIVE,
114
   MATRIX_2D,
115
   MATRIX_2D_NO_ROT,
116
   MATRIX_3D
117
};
118
static char *mstrings[7] = {
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   "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 */