m_debug_clip.c revision b8f29f29eb611c92d43aaf8ffcd2d9743b3af967
1/* 2 * Mesa 3-D graphics library 3 * Version: 6.1 4 * 5 * Copyright (C) 1999-2005 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 * Authors: 25 * Gareth Hughes 26 */ 27 28#include "glheader.h" 29#include "context.h" 30#include "macros.h" 31#include "imports.h" 32 33#include "m_matrix.h" 34#include "m_xform.h" 35 36#include "m_debug.h" 37#include "m_debug_util.h" 38 39#ifdef __UNIXOS2__ 40/* The linker doesn't like empty files */ 41static char dummy; 42#endif 43 44#ifdef DEBUG /* This code only used for debugging */ 45 46static clip_func *clip_tab[2] = { 47 _mesa_clip_tab, 48 _mesa_clip_np_tab 49}; 50static char *cnames[2] = { 51 "_mesa_clip_tab", 52 "_mesa_clip_np_tab" 53}; 54#ifdef RUN_DEBUG_BENCHMARK 55static char *cstrings[2] = { 56 "clip, perspective divide", 57 "clip, no divide" 58}; 59#endif 60 61 62/* ============================================================= 63 * Reference cliptests 64 */ 65 66static GLvector4f *ref_cliptest_points4( GLvector4f *clip_vec, 67 GLvector4f *proj_vec, 68 GLubyte clipMask[], 69 GLubyte *orMask, 70 GLubyte *andMask ) 71{ 72 const GLuint stride = clip_vec->stride; 73 const GLuint count = clip_vec->count; 74 const GLfloat *from = (GLfloat *)clip_vec->start; 75 GLuint c = 0; 76 GLfloat (*vProj)[4] = (GLfloat (*)[4])proj_vec->start; 77 GLubyte tmpAndMask = *andMask; 78 GLubyte tmpOrMask = *orMask; 79 GLuint i; 80 for ( i = 0 ; i < count ; i++, STRIDE_F(from, stride) ) { 81 const GLfloat cx = from[0]; 82 const GLfloat cy = from[1]; 83 const GLfloat cz = from[2]; 84 const GLfloat cw = from[3]; 85 GLubyte mask = 0; 86 if ( -cx + cw < 0 ) mask |= CLIP_RIGHT_BIT; 87 if ( cx + cw < 0 ) mask |= CLIP_LEFT_BIT; 88 if ( -cy + cw < 0 ) mask |= CLIP_TOP_BIT; 89 if ( cy + cw < 0 ) mask |= CLIP_BOTTOM_BIT; 90 if ( -cz + cw < 0 ) mask |= CLIP_FAR_BIT; 91 if ( cz + cw < 0 ) mask |= CLIP_NEAR_BIT; 92 clipMask[i] = mask; 93 if ( mask ) { 94 c++; 95 tmpAndMask &= mask; 96 tmpOrMask |= mask; 97 vProj[i][0] = 0; 98 vProj[i][1] = 0; 99 vProj[i][2] = 0; 100 vProj[i][3] = 1; 101 } else { 102 GLfloat oow = 1.0F / cw; 103 vProj[i][0] = cx * oow; 104 vProj[i][1] = cy * oow; 105 vProj[i][2] = cz * oow; 106 vProj[i][3] = oow; 107 } 108 } 109 110 *orMask = tmpOrMask; 111 *andMask = (GLubyte) (c < count ? 0 : tmpAndMask); 112 113 proj_vec->flags |= VEC_SIZE_4; 114 proj_vec->size = 4; 115 proj_vec->count = clip_vec->count; 116 return proj_vec; 117} 118 119/* Keep these here for now, even though we don't use them... 120 */ 121static GLvector4f *ref_cliptest_points3( GLvector4f *clip_vec, 122 GLvector4f *proj_vec, 123 GLubyte clipMask[], 124 GLubyte *orMask, 125 GLubyte *andMask ) 126{ 127 const GLuint stride = clip_vec->stride; 128 const GLuint count = clip_vec->count; 129 const GLfloat *from = (GLfloat *)clip_vec->start; 130 131 GLubyte tmpOrMask = *orMask; 132 GLubyte tmpAndMask = *andMask; 133 GLuint i; 134 for ( i = 0 ; i < count ; i++, STRIDE_F(from, stride) ) { 135 const GLfloat cx = from[0], cy = from[1], cz = from[2]; 136 GLubyte mask = 0; 137 if ( cx > 1.0 ) mask |= CLIP_RIGHT_BIT; 138 else if ( cx < -1.0 ) mask |= CLIP_LEFT_BIT; 139 if ( cy > 1.0 ) mask |= CLIP_TOP_BIT; 140 else if ( cy < -1.0 ) mask |= CLIP_BOTTOM_BIT; 141 if ( cz > 1.0 ) mask |= CLIP_FAR_BIT; 142 else if ( cz < -1.0 ) mask |= CLIP_NEAR_BIT; 143 clipMask[i] = mask; 144 tmpOrMask |= mask; 145 tmpAndMask &= mask; 146 } 147 148 *orMask = tmpOrMask; 149 *andMask = tmpAndMask; 150 return clip_vec; 151} 152 153static GLvector4f * ref_cliptest_points2( GLvector4f *clip_vec, 154 GLvector4f *proj_vec, 155 GLubyte clipMask[], 156 GLubyte *orMask, 157 GLubyte *andMask ) 158{ 159 const GLuint stride = clip_vec->stride; 160 const GLuint count = clip_vec->count; 161 const GLfloat *from = (GLfloat *)clip_vec->start; 162 163 GLubyte tmpOrMask = *orMask; 164 GLubyte tmpAndMask = *andMask; 165 GLuint i; 166 for ( i = 0 ; i < count ; i++, STRIDE_F(from, stride) ) { 167 const GLfloat cx = from[0], cy = from[1]; 168 GLubyte mask = 0; 169 if ( cx > 1.0 ) mask |= CLIP_RIGHT_BIT; 170 else if ( cx < -1.0 ) mask |= CLIP_LEFT_BIT; 171 if ( cy > 1.0 ) mask |= CLIP_TOP_BIT; 172 else if ( cy < -1.0 ) mask |= CLIP_BOTTOM_BIT; 173 clipMask[i] = mask; 174 tmpOrMask |= mask; 175 tmpAndMask &= mask; 176 } 177 178 *orMask = tmpOrMask; 179 *andMask = tmpAndMask; 180 return clip_vec; 181} 182 183static clip_func ref_cliptest[5] = { 184 0, 185 0, 186 ref_cliptest_points2, 187 ref_cliptest_points3, 188 ref_cliptest_points4 189}; 190 191 192/* ============================================================= 193 * Cliptest tests 194 */ 195 196ALIGN16(static GLfloat, s[TEST_COUNT][4]); 197ALIGN16(static GLfloat, d[TEST_COUNT][4]); 198ALIGN16(static GLfloat, r[TEST_COUNT][4]); 199 200 201static int test_cliptest_function( clip_func func, int np, 202 int psize, long *cycles ) 203{ 204 GLvector4f source[1], dest[1], ref[1]; 205 GLubyte dm[TEST_COUNT], dco, dca; 206 GLubyte rm[TEST_COUNT], rco, rca; 207 int i, j; 208#ifdef RUN_DEBUG_BENCHMARK 209 int cycle_i; /* the counter for the benchmarks we run */ 210#endif 211 212 (void) cycles; 213 214 if ( psize > 4 ) { 215 _mesa_problem( NULL, "test_cliptest_function called with psize > 4\n" ); 216 return 0; 217 } 218 219 for ( i = 0 ; i < TEST_COUNT ; i++) { 220 ASSIGN_4V( d[i], 0.0, 0.0, 0.0, 1.0 ); 221 ASSIGN_4V( s[i], 0.0, 0.0, 0.0, 1.0 ); 222 for ( j = 0 ; j < psize ; j++ ) 223 s[i][j] = rnd(); 224 } 225 226 source->data = (GLfloat(*)[4])s; 227 source->start = (GLfloat *)s; 228 source->count = TEST_COUNT; 229 source->stride = sizeof(s[0]); 230 source->size = 4; 231 source->flags = 0; 232 233 dest->data = (GLfloat(*)[4])d; 234 dest->start = (GLfloat *)d; 235 dest->count = TEST_COUNT; 236 dest->stride = sizeof(float[4]); 237 dest->size = 0; 238 dest->flags = 0; 239 240 ref->data = (GLfloat(*)[4])r; 241 ref->start = (GLfloat *)r; 242 ref->count = TEST_COUNT; 243 ref->stride = sizeof(float[4]); 244 ref->size = 0; 245 ref->flags = 0; 246 247 dco = rco = 0; 248 dca = rca = CLIP_ALL_BITS; 249 250 ref_cliptest[psize]( source, ref, rm, &rco, &rca ); 251 252 if ( mesa_profile ) { 253 BEGIN_RACE( *cycles ); 254 func( source, dest, dm, &dco, &dca ); 255 END_RACE( *cycles ); 256 } 257 else { 258 func( source, dest, dm, &dco, &dca ); 259 } 260 261 if ( dco != rco ) { 262 _mesa_printf( "\n-----------------------------\n" ); 263 _mesa_printf( "dco = 0x%02x rco = 0x%02x\n", dco, rco ); 264 return 0; 265 } 266 if ( dca != rca ) { 267 _mesa_printf( "\n-----------------------------\n" ); 268 _mesa_printf( "dca = 0x%02x rca = 0x%02x\n", dca, rca ); 269 return 0; 270 } 271 for ( i = 0 ; i < TEST_COUNT ; i++ ) { 272 if ( dm[i] != rm[i] ) { 273 _mesa_printf( "\n-----------------------------\n" ); 274 _mesa_printf( "(i = %i)\n", i ); 275 _mesa_printf( "dm = 0x%02x rm = 0x%02x\n", dm[i], rm[i] ); 276 return 0; 277 } 278 } 279 280 /* Only verify output on projected points4 case. FIXME: Do we need 281 * to test other cases? 282 */ 283 if ( np || psize < 4 ) 284 return 1; 285 286 for ( i = 0 ; i < TEST_COUNT ; i++ ) { 287 for ( j = 0 ; j < 4 ; j++ ) { 288 if ( significand_match( d[i][j], r[i][j] ) < REQUIRED_PRECISION ) { 289 _mesa_printf( "\n-----------------------------\n" ); 290 _mesa_printf( "(i = %i, j = %i) dm = 0x%02x rm = 0x%02x\n", 291 i, j, dm[i], rm[i] ); 292 _mesa_printf( "%f \t %f \t [diff = %e - %i bit missed]\n", 293 d[i][0], r[i][0], r[i][0]-d[i][0], 294 MAX_PRECISION - significand_match( d[i][0], r[i][0] ) ); 295 _mesa_printf( "%f \t %f \t [diff = %e - %i bit missed]\n", 296 d[i][1], r[i][1], r[i][1]-d[i][1], 297 MAX_PRECISION - significand_match( d[i][1], r[i][1] ) ); 298 _mesa_printf( "%f \t %f \t [diff = %e - %i bit missed]\n", 299 d[i][2], r[i][2], r[i][2]-d[i][2], 300 MAX_PRECISION - significand_match( d[i][2], r[i][2] ) ); 301 _mesa_printf( "%f \t %f \t [diff = %e - %i bit missed]\n", 302 d[i][3], r[i][3], r[i][3]-d[i][3], 303 MAX_PRECISION - significand_match( d[i][3], r[i][3] ) ); 304 return 0; 305 } 306 } 307 } 308 309 return 1; 310} 311 312void _math_test_all_cliptest_functions( char *description ) 313{ 314 int np, psize; 315 long benchmark_tab[2][4]; 316 static int first_time = 1; 317 318 if ( first_time ) { 319 first_time = 0; 320 mesa_profile = _mesa_getenv( "MESA_PROFILE" ); 321 } 322 323#ifdef RUN_DEBUG_BENCHMARK 324 if ( mesa_profile ) { 325 if ( !counter_overhead ) { 326 INIT_COUNTER(); 327 _mesa_printf( "counter overhead: %ld cycles\n\n", counter_overhead ); 328 } 329 _mesa_printf( "cliptest results after hooking in %s functions:\n", description ); 330 } 331#endif 332 333#ifdef RUN_DEBUG_BENCHMARK 334 if ( mesa_profile ) { 335 _mesa_printf( "\n\t" ); 336 for ( psize = 2 ; psize <= 4 ; psize++ ) { 337 _mesa_printf( " p%d\t", psize ); 338 } 339 _mesa_printf( "\n--------------------------------------------------------\n\t" ); 340 } 341#endif 342 343 for ( np = 0 ; np < 2 ; np++ ) { 344 for ( psize = 2 ; psize <= 4 ; psize++ ) { 345 clip_func func = clip_tab[np][psize]; 346 long *cycles = &(benchmark_tab[np][psize-1]); 347 348 if ( test_cliptest_function( func, np, psize, cycles ) == 0 ) { 349 char buf[100]; 350 _mesa_sprintf( buf, "%s[%d] failed test (%s)", 351 cnames[np], psize, description ); 352 _mesa_problem( NULL, buf ); 353 } 354#ifdef RUN_DEBUG_BENCHMARK 355 if ( mesa_profile ) 356 _mesa_printf( " %li\t", benchmark_tab[np][psize-1] ); 357#endif 358 } 359#ifdef RUN_DEBUG_BENCHMARK 360 if ( mesa_profile ) 361 _mesa_printf( " | [%s]\n\t", cstrings[np] ); 362#endif 363 } 364#ifdef RUN_DEBUG_BENCHMARK 365 if ( mesa_profile ) 366 _mesa_printf( "\n" ); 367#endif 368} 369 370 371#endif /* DEBUG */ 372