2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * 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
= 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 */