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134 giacomo 1
/* $Id: m_clip_debug.c,v 1.1 2003-04-24 13:37:46 giacomo Exp $ */
2
 
3
/*
4
 * Mesa 3-D graphics library
5
 * Version:  5.0
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
 * Authors:
27
 *    Gareth Hughes
28
 */
29
 
30
#include "glheader.h"
31
#include "context.h"
32
#include "macros.h"
33
#include "imports.h"
34
 
35
#include "m_matrix.h"
36
#include "m_xform.h"
37
 
38
#include "m_debug.h"
39
#include "m_debug_util.h"
40
 
41
#ifdef DEBUG  /* This code only used for debugging */
42
 
43
static clip_func *clip_tab[2] = {
44
   _mesa_clip_tab,
45
   _mesa_clip_np_tab
46
};
47
static char *cnames[2] = {
48
   "_mesa_clip_tab",
49
   "_mesa_clip_np_tab"
50
};
51
#ifdef RUN_DEBUG_BENCHMARK
52
static char *cstrings[2] = {
53
   "clip, perspective divide",
54
   "clip, no divide"
55
};
56
#endif
57
 
58
 
59
/* =============================================================
60
 * Reference cliptests
61
 */
62
 
63
static GLvector4f *ref_cliptest_points4( GLvector4f *clip_vec,
64
                                         GLvector4f *proj_vec,
65
                                         GLubyte clipMask[],
66
                                         GLubyte *orMask,
67
                                         GLubyte *andMask )
68
{
69
   const GLuint stride = clip_vec->stride;
70
   const GLuint count = clip_vec->count;
71
   const GLfloat *from = (GLfloat *)clip_vec->start;
72
   GLuint c = 0;
73
   GLfloat (*vProj)[4] = (GLfloat (*)[4])proj_vec->start;
74
   GLubyte tmpAndMask = *andMask;
75
   GLubyte tmpOrMask = *orMask;
76
   GLuint i;
77
   for ( i = 0 ; i < count ; i++, STRIDE_F(from, stride) ) {
78
      const GLfloat cx = from[0];
79
      const GLfloat cy = from[1];
80
      const GLfloat cz = from[2];
81
      const GLfloat cw = from[3];
82
      GLubyte mask = 0;
83
      if ( -cx + cw < 0 ) mask |= CLIP_RIGHT_BIT;
84
      if (  cx + cw < 0 ) mask |= CLIP_LEFT_BIT;
85
      if ( -cy + cw < 0 ) mask |= CLIP_TOP_BIT;
86
      if (  cy + cw < 0 ) mask |= CLIP_BOTTOM_BIT;
87
      if ( -cz + cw < 0 ) mask |= CLIP_FAR_BIT;
88
      if (  cz + cw < 0 ) mask |= CLIP_NEAR_BIT;
89
      clipMask[i] = mask;
90
      if ( mask ) {
91
         c++;
92
         tmpAndMask &= mask;
93
         tmpOrMask |= mask;
94
         vProj[i][0] = 0;
95
         vProj[i][1] = 0;
96
         vProj[i][2] = 0;
97
         vProj[i][3] = 1;
98
      } else {
99
         GLfloat oow = 1.0F / cw;
100
         vProj[i][0] = cx * oow;
101
         vProj[i][1] = cy * oow;
102
         vProj[i][2] = cz * oow;
103
         vProj[i][3] = oow;
104
      }
105
   }
106
 
107
   *orMask = tmpOrMask;
108
   *andMask = (GLubyte) (c < count ? 0 : tmpAndMask);
109
 
110
   proj_vec->flags |= VEC_SIZE_4;
111
   proj_vec->size = 4;
112
   proj_vec->count = clip_vec->count;
113
   return proj_vec;
114
}
115
 
116
/* Keep these here for now, even though we don't use them...
117
 */
118
static GLvector4f *ref_cliptest_points3( GLvector4f *clip_vec,
119
                                         GLvector4f *proj_vec,
120
                                         GLubyte clipMask[],
121
                                         GLubyte *orMask,
122
                                         GLubyte *andMask )
123
{
124
   const GLuint stride = clip_vec->stride;
125
   const GLuint count = clip_vec->count;
126
   const GLfloat *from = (GLfloat *)clip_vec->start;
127
 
128
   GLubyte tmpOrMask = *orMask;
129
   GLubyte tmpAndMask = *andMask;
130
   GLuint i;
131
   for ( i = 0 ; i < count ; i++, STRIDE_F(from, stride) ) {
132
      const GLfloat cx = from[0], cy = from[1], cz = from[2];
133
      GLubyte mask = 0;
134
      if ( cx >  1.0 )          mask |= CLIP_RIGHT_BIT;
135
      else if ( cx < -1.0 )     mask |= CLIP_LEFT_BIT;
136
      if ( cy >  1.0 )          mask |= CLIP_TOP_BIT;
137
      else if ( cy < -1.0 )     mask |= CLIP_BOTTOM_BIT;
138
      if ( cz >  1.0 )          mask |= CLIP_FAR_BIT;
139
      else if ( cz < -1.0 )     mask |= CLIP_NEAR_BIT;
140
      clipMask[i] = mask;
141
      tmpOrMask |= mask;
142
      tmpAndMask &= mask;
143
   }
144
 
145
   *orMask = tmpOrMask;
146
   *andMask = tmpAndMask;
147
   return clip_vec;
148
}
149
 
150
static GLvector4f * ref_cliptest_points2( GLvector4f *clip_vec,
151
                                          GLvector4f *proj_vec,
152
                                          GLubyte clipMask[],
153
                                          GLubyte *orMask,
154
                                          GLubyte *andMask )
155
{
156
   const GLuint stride = clip_vec->stride;
157
   const GLuint count = clip_vec->count;
158
   const GLfloat *from = (GLfloat *)clip_vec->start;
159
 
160
   GLubyte tmpOrMask = *orMask;
161
   GLubyte tmpAndMask = *andMask;
162
   GLuint i;
163
   for ( i = 0 ; i < count ; i++, STRIDE_F(from, stride) ) {
164
      const GLfloat cx = from[0], cy = from[1];
165
      GLubyte mask = 0;
166
      if ( cx >  1.0 )          mask |= CLIP_RIGHT_BIT;
167
      else if ( cx < -1.0 )     mask |= CLIP_LEFT_BIT;
168
      if ( cy >  1.0 )          mask |= CLIP_TOP_BIT;
169
      else if ( cy < -1.0 )     mask |= CLIP_BOTTOM_BIT;
170
      clipMask[i] = mask;
171
      tmpOrMask |= mask;
172
      tmpAndMask &= mask;
173
   }
174
 
175
   *orMask = tmpOrMask;
176
   *andMask = tmpAndMask;
177
   return clip_vec;
178
}
179
 
180
static clip_func ref_cliptest[5] = {
181
   0,
182
   0,
183
   ref_cliptest_points2,
184
   ref_cliptest_points3,
185
   ref_cliptest_points4
186
};
187
 
188
 
189
/* =============================================================
190
 * Cliptest tests
191
 */
192
 
193
static GLfloat s[TEST_COUNT][4] ALIGN16;
194
static GLfloat d[TEST_COUNT][4] ALIGN16;
195
static GLfloat r[TEST_COUNT][4] ALIGN16;
196
 
197
static int test_cliptest_function( clip_func func, int np,
198
                                   int psize, long *cycles )
199
{
200
   GLvector4f source[1], dest[1], ref[1];
201
   GLubyte dm[TEST_COUNT], dco, dca;
202
   GLubyte rm[TEST_COUNT], rco, rca;
203
   int i, j;
204
#ifdef  RUN_DEBUG_BENCHMARK
205
   int cycle_i;                /* the counter for the benchmarks we run */
206
#endif
207
 
208
   (void) cycles;
209
 
210
   if ( psize > 4 ) {
211
      _mesa_problem( NULL, "test_cliptest_function called with psize > 4\n" );
212
      return 0;
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
   dco = rco = 0;
244
   dca = rca = CLIP_ALL_BITS;
245
 
246
   ref_cliptest[psize]( source, ref, rm, &rco, &rca );
247
 
248
   if ( mesa_profile ) {
249
      BEGIN_RACE( *cycles );
250
      func( source, dest, dm, &dco, &dca );
251
      END_RACE( *cycles );
252
   }
253
   else {
254
      func( source, dest, dm, &dco, &dca );
255
   }
256
 
257
   if ( dco != rco ) {
258
      _mesa_printf(NULL, "\n-----------------------------\n" );
259
      _mesa_printf(NULL, "dco = 0x%02x   rco = 0x%02x\n", dco, rco );
260
      return 0;
261
   }
262
   if ( dca != rca ) {
263
      _mesa_printf(NULL, "\n-----------------------------\n" );
264
      _mesa_printf(NULL, "dca = 0x%02x   rca = 0x%02x\n", dca, rca );
265
      return 0;
266
   }
267
   for ( i = 0 ; i < TEST_COUNT ; i++ ) {
268
      if ( dm[i] != rm[i] ) {
269
         _mesa_printf(NULL, "\n-----------------------------\n" );
270
         _mesa_printf(NULL, "(i = %i)\n", i );
271
         _mesa_printf(NULL, "dm = 0x%02x   rm = 0x%02x\n", dm[i], rm[i] );
272
         return 0;
273
      }
274
   }
275
 
276
   /* Only verify output on projected points4 case.  FIXME: Do we need
277
    * to test other cases?
278
    */
279
   if ( np || psize < 4 )
280
      return 1;
281
 
282
   for ( i = 0 ; i < TEST_COUNT ; i++ ) {
283
      for ( j = 0 ; j < 4 ; j++ ) {
284
         if ( significand_match( d[i][j], r[i][j] ) < REQUIRED_PRECISION ) {
285
            _mesa_printf(NULL, "\n-----------------------------\n" );
286
            _mesa_printf(NULL, "(i = %i, j = %i)  dm = 0x%02x   rm = 0x%02x\n",
287
                    i, j, dm[i], rm[i] );
288
            _mesa_printf(NULL, "%f \t %f \t [diff = %e - %i bit missed]\n",
289
                    d[i][0], r[i][0], r[i][0]-d[i][0],
290
                    MAX_PRECISION - significand_match( d[i][0], r[i][0] ) );
291
            _mesa_printf(NULL, "%f \t %f \t [diff = %e - %i bit missed]\n",
292
                    d[i][1], r[i][1], r[i][1]-d[i][1],
293
                    MAX_PRECISION - significand_match( d[i][1], r[i][1] ) );
294
            _mesa_printf(NULL, "%f \t %f \t [diff = %e - %i bit missed]\n",
295
                    d[i][2], r[i][2], r[i][2]-d[i][2],
296
                    MAX_PRECISION - significand_match( d[i][2], r[i][2] ) );
297
            _mesa_printf(NULL, "%f \t %f \t [diff = %e - %i bit missed]\n",
298
                    d[i][3], r[i][3], r[i][3]-d[i][3],
299
                    MAX_PRECISION - significand_match( d[i][3], r[i][3] ) );
300
            return 0;
301
         }
302
      }
303
   }
304
 
305
   return 1;
306
}
307
 
308
void _math_test_all_cliptest_functions( char *description )
309
{
310
   int np, psize;
311
   long benchmark_tab[2][4];
312
   static int first_time = 1;
313
 
314
   if ( first_time ) {
315
      first_time = 0;
316
      mesa_profile = _mesa_getenv( "MESA_PROFILE" );
317
   }
318
 
319
#ifdef RUN_DEBUG_BENCHMARK
320
   if ( mesa_profile ) {
321
      if ( !counter_overhead ) {
322
         INIT_COUNTER();
323
         _mesa_printf(NULL, "counter overhead: %ld cycles\n\n", counter_overhead );
324
      }
325
      _mesa_printf(NULL, "cliptest results after hooking in %s functions:\n", description );
326
   }
327
#endif
328
 
329
#ifdef RUN_DEBUG_BENCHMARK
330
   if ( mesa_profile ) {
331
      _mesa_printf(NULL, "\n\t" );
332
      for ( psize = 2 ; psize <= 4 ; psize++ ) {
333
         _mesa_printf(NULL, " p%d\t", psize );
334
      }
335
      _mesa_printf(NULL, "\n--------------------------------------------------------\n\t" );
336
   }
337
#endif
338
 
339
   for ( np = 0 ; np < 2 ; np++ ) {
340
      for ( psize = 2 ; psize <= 4 ; psize++ ) {
341
         clip_func func = clip_tab[np][psize];
342
         long *cycles = &(benchmark_tab[np][psize-1]);
343
 
344
         if ( test_cliptest_function( func, np, psize, cycles ) == 0 ) {
345
            char buf[100];
346
            _mesa_sprintf(NULL, buf, "%s[%d] failed test (%s)",
347
                     cnames[np], psize, description );
348
            _mesa_problem( NULL, buf );
349
         }
350
#ifdef RUN_DEBUG_BENCHMARK
351
         if ( mesa_profile )
352
            _mesa_printf(NULL, " %li\t", benchmark_tab[np][psize-1] );
353
#endif
354
      }
355
#ifdef RUN_DEBUG_BENCHMARK
356
      if ( mesa_profile )
357
         _mesa_printf(NULL, " | [%s]\n\t", cstrings[np] );
358
#endif
359
   }
360
#ifdef RUN_DEBUG_BENCHMARK
361
   if ( mesa_profile )
362
      _mesa_printf(NULL, "\n" );
363
#endif
364
}
365
 
366
 
367
#endif /* DEBUG */