2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
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:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
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.
28 #include "main/glheader.h"
29 #include "main/context.h"
30 #include "main/macros.h"
31 #include "main/imports.h"
37 #include "m_debug_util.h"
40 /* The linker doesn't like empty files */
44 #ifdef DEBUG_MATH /* This code only used for debugging */
46 static clip_func *clip_tab[2] = {
50 static char *cnames[2] = {
54 #ifdef RUN_DEBUG_BENCHMARK
55 static char *cstrings[2] = {
56 "clip, perspective divide",
62 /* =============================================================
66 static GLvector4f *ref_cliptest_points4( GLvector4f *clip_vec,
71 GLboolean viewport_z_clip )
73 const GLuint stride = clip_vec->stride;
74 const GLuint count = clip_vec->count;
75 const GLfloat *from = (GLfloat *)clip_vec->start;
77 GLfloat (*vProj)[4] = (GLfloat (*)[4])proj_vec->start;
78 GLubyte tmpAndMask = *andMask;
79 GLubyte tmpOrMask = *orMask;
81 for ( i = 0 ; i < count ; i++, STRIDE_F(from, stride) ) {
82 const GLfloat cx = from[0];
83 const GLfloat cy = from[1];
84 const GLfloat cz = from[2];
85 const GLfloat cw = from[3];
87 if ( -cx + cw < 0 ) mask |= CLIP_RIGHT_BIT;
88 if ( cx + cw < 0 ) mask |= CLIP_LEFT_BIT;
89 if ( -cy + cw < 0 ) mask |= CLIP_TOP_BIT;
90 if ( cy + cw < 0 ) mask |= CLIP_BOTTOM_BIT;
91 if (viewport_z_clip) {
92 if ( -cz + cw < 0 ) mask |= CLIP_FAR_BIT;
93 if ( cz + cw < 0 ) mask |= CLIP_NEAR_BIT;
105 GLfloat oow = 1.0F / cw;
106 vProj[i][0] = cx * oow;
107 vProj[i][1] = cy * oow;
108 vProj[i][2] = cz * oow;
114 *andMask = (GLubyte) (c < count ? 0 : tmpAndMask);
116 proj_vec->flags |= VEC_SIZE_4;
118 proj_vec->count = clip_vec->count;
122 /* Keep these here for now, even though we don't use them...
124 static GLvector4f *ref_cliptest_points3( GLvector4f *clip_vec,
125 GLvector4f *proj_vec,
129 GLboolean viewport_z_clip )
131 const GLuint stride = clip_vec->stride;
132 const GLuint count = clip_vec->count;
133 const GLfloat *from = (GLfloat *)clip_vec->start;
135 GLubyte tmpOrMask = *orMask;
136 GLubyte tmpAndMask = *andMask;
138 for ( i = 0 ; i < count ; i++, STRIDE_F(from, stride) ) {
139 const GLfloat cx = from[0], cy = from[1], cz = from[2];
141 if ( cx > 1.0 ) mask |= CLIP_RIGHT_BIT;
142 else if ( cx < -1.0 ) mask |= CLIP_LEFT_BIT;
143 if ( cy > 1.0 ) mask |= CLIP_TOP_BIT;
144 else if ( cy < -1.0 ) mask |= CLIP_BOTTOM_BIT;
145 if (viewport_z_clip) {
146 if ( cz > 1.0 ) mask |= CLIP_FAR_BIT;
147 else if ( cz < -1.0 ) mask |= CLIP_NEAR_BIT;
155 *andMask = tmpAndMask;
159 static GLvector4f * ref_cliptest_points2( GLvector4f *clip_vec,
160 GLvector4f *proj_vec,
164 GLboolean viewport_z_clip )
166 const GLuint stride = clip_vec->stride;
167 const GLuint count = clip_vec->count;
168 const GLfloat *from = (GLfloat *)clip_vec->start;
170 GLubyte tmpOrMask = *orMask;
171 GLubyte tmpAndMask = *andMask;
174 (void) viewport_z_clip;
176 for ( i = 0 ; i < count ; i++, STRIDE_F(from, stride) ) {
177 const GLfloat cx = from[0], cy = from[1];
179 if ( cx > 1.0 ) mask |= CLIP_RIGHT_BIT;
180 else if ( cx < -1.0 ) mask |= CLIP_LEFT_BIT;
181 if ( cy > 1.0 ) mask |= CLIP_TOP_BIT;
182 else if ( cy < -1.0 ) mask |= CLIP_BOTTOM_BIT;
189 *andMask = tmpAndMask;
193 static clip_func ref_cliptest[5] = {
196 ref_cliptest_points2,
197 ref_cliptest_points3,
202 /* =============================================================
206 ALIGN16(static GLfloat, s[TEST_COUNT][4]);
207 ALIGN16(static GLfloat, d[TEST_COUNT][4]);
208 ALIGN16(static GLfloat, r[TEST_COUNT][4]);
212 * Check if X, Y or Z component of the coordinate is close to W, in terms
216 xyz_close_to_w(const GLfloat c[4])
219 return (fabs(c[0] - c[3]) < k ||
220 fabs(c[1] - c[3]) < k ||
221 fabs(c[2] - c[3]) < k ||
222 fabs(-c[0] - c[3]) < k ||
223 fabs(-c[1] - c[3]) < k ||
224 fabs(-c[2] - c[3]) < k);
229 static int test_cliptest_function( clip_func func, int np,
230 int psize, long *cycles )
232 GLvector4f source[1], dest[1], ref[1];
233 GLubyte dm[TEST_COUNT], dco, dca;
234 GLubyte rm[TEST_COUNT], rco, rca;
236 #ifdef RUN_DEBUG_BENCHMARK
237 int cycle_i; /* the counter for the benchmarks we run */
239 GLboolean viewport_z_clip = GL_TRUE;
244 _mesa_problem( NULL, "test_cliptest_function called with psize > 4\n" );
248 for ( i = 0 ; i < TEST_COUNT ; i++) {
249 ASSIGN_4V( d[i], 0.0, 0.0, 0.0, 1.0 );
250 ASSIGN_4V( s[i], 0.0, 0.0, 0.0, 1.0 );
251 for ( j = 0 ; j < psize ; j++ )
255 source->data = (GLfloat(*)[4])s;
256 source->start = (GLfloat *)s;
257 source->count = TEST_COUNT;
258 source->stride = sizeof(s[0]);
262 dest->data = (GLfloat(*)[4])d;
263 dest->start = (GLfloat *)d;
264 dest->count = TEST_COUNT;
265 dest->stride = sizeof(float[4]);
269 ref->data = (GLfloat(*)[4])r;
270 ref->start = (GLfloat *)r;
271 ref->count = TEST_COUNT;
272 ref->stride = sizeof(float[4]);
277 dca = rca = CLIP_FRUSTUM_BITS;
279 ref_cliptest[psize]( source, ref, rm, &rco, &rca, viewport_z_clip );
281 if ( mesa_profile ) {
282 BEGIN_RACE( *cycles );
283 func( source, dest, dm, &dco, &dca, viewport_z_clip );
287 func( source, dest, dm, &dco, &dca, viewport_z_clip );
291 printf( "\n-----------------------------\n" );
292 printf( "dco = 0x%02x rco = 0x%02x\n", dco, rco );
296 printf( "\n-----------------------------\n" );
297 printf( "dca = 0x%02x rca = 0x%02x\n", dca, rca );
300 for ( i = 0 ; i < TEST_COUNT ; i++ ) {
301 if ( dm[i] != rm[i] ) {
302 GLfloat *c = source->start;
303 STRIDE_F(c, source->stride * i);
304 if (psize == 4 && xyz_close_to_w(c)) {
305 /* The coordinate is very close to the clip plane. The clipmask
306 * may vary depending on code path, but that's OK.
310 printf( "\n-----------------------------\n" );
311 printf( "mask[%d] = 0x%02x ref mask[%d] = 0x%02x\n", i, dm[i], i,rm[i] );
312 printf(" coord = %f, %f, %f, %f\n",
313 c[0], c[1], c[2], c[3]);
318 /* Only verify output on projected points4 case. FIXME: Do we need
319 * to test other cases?
321 if ( np || psize < 4 )
324 for ( i = 0 ; i < TEST_COUNT ; i++ ) {
325 for ( j = 0 ; j < 4 ; j++ ) {
326 if ( significand_match( d[i][j], r[i][j] ) < REQUIRED_PRECISION ) {
327 printf( "\n-----------------------------\n" );
328 printf( "(i = %i, j = %i) dm = 0x%02x rm = 0x%02x\n",
329 i, j, dm[i], rm[i] );
330 printf( "%f \t %f \t [diff = %e - %i bit missed]\n",
331 d[i][0], r[i][0], r[i][0]-d[i][0],
332 MAX_PRECISION - significand_match( d[i][0], r[i][0] ) );
333 printf( "%f \t %f \t [diff = %e - %i bit missed]\n",
334 d[i][1], r[i][1], r[i][1]-d[i][1],
335 MAX_PRECISION - significand_match( d[i][1], r[i][1] ) );
336 printf( "%f \t %f \t [diff = %e - %i bit missed]\n",
337 d[i][2], r[i][2], r[i][2]-d[i][2],
338 MAX_PRECISION - significand_match( d[i][2], r[i][2] ) );
339 printf( "%f \t %f \t [diff = %e - %i bit missed]\n",
340 d[i][3], r[i][3], r[i][3]-d[i][3],
341 MAX_PRECISION - significand_match( d[i][3], r[i][3] ) );
350 void _math_test_all_cliptest_functions( char *description )
353 long benchmark_tab[2][4];
354 static int first_time = 1;
358 mesa_profile = _mesa_getenv( "MESA_PROFILE" );
361 #ifdef RUN_DEBUG_BENCHMARK
362 if ( mesa_profile ) {
363 if ( !counter_overhead ) {
365 printf( "counter overhead: %ld cycles\n\n", counter_overhead );
367 printf( "cliptest results after hooking in %s functions:\n", description );
371 #ifdef RUN_DEBUG_BENCHMARK
372 if ( mesa_profile ) {
374 for ( psize = 2 ; psize <= 4 ; psize++ ) {
375 printf( " p%d\t", psize );
377 printf( "\n--------------------------------------------------------\n\t" );
381 for ( np = 0 ; np < 2 ; np++ ) {
382 for ( psize = 2 ; psize <= 4 ; psize++ ) {
383 clip_func func = clip_tab[np][psize];
384 long *cycles = &(benchmark_tab[np][psize-1]);
386 if ( test_cliptest_function( func, np, psize, cycles ) == 0 ) {
388 sprintf( buf, "%s[%d] failed test (%s)",
389 cnames[np], psize, description );
390 _mesa_problem( NULL, "%s", buf );
392 #ifdef RUN_DEBUG_BENCHMARK
394 printf( " %li\t", benchmark_tab[np][psize-1] );
397 #ifdef RUN_DEBUG_BENCHMARK
399 printf( " | [%s]\n\t", cstrings[np] );
402 #ifdef RUN_DEBUG_BENCHMARK
409 #endif /* DEBUG_MATH */