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mesa: Remove support for named parameters.
[mesa.git] / src / mesa / program / prog_execute.c
1 /*
2 * Mesa 3-D graphics library
3 * Version: 7.3
4 *
5 * Copyright (C) 1999-2008 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
25 /**
26 * \file prog_execute.c
27 * Software interpreter for vertex/fragment programs.
28 * \author Brian Paul
29 */
30
31 /*
32 * NOTE: we do everything in single-precision floating point; we don't
33 * currently observe the single/half/fixed-precision qualifiers.
34 *
35 */
36
37
38 #include "main/glheader.h"
39 #include "main/colormac.h"
40 #include "main/macros.h"
41 #include "prog_execute.h"
42 #include "prog_instruction.h"
43 #include "prog_parameter.h"
44 #include "prog_print.h"
45 #include "prog_noise.h"
46
47
48 /* debug predicate */
49 #define DEBUG_PROG 0
50
51
52 /**
53 * Set x to positive or negative infinity.
54 */
55 #if defined(USE_IEEE) || defined(_WIN32)
56 #define SET_POS_INFINITY(x) \
57 do { \
58 fi_type fi; \
59 fi.i = 0x7F800000; \
60 x = fi.f; \
61 } while (0)
62 #define SET_NEG_INFINITY(x) \
63 do { \
64 fi_type fi; \
65 fi.i = 0xFF800000; \
66 x = fi.f; \
67 } while (0)
68 #elif defined(VMS)
69 #define SET_POS_INFINITY(x) x = __MAXFLOAT
70 #define SET_NEG_INFINITY(x) x = -__MAXFLOAT
71 #else
72 #define SET_POS_INFINITY(x) x = (GLfloat) HUGE_VAL
73 #define SET_NEG_INFINITY(x) x = (GLfloat) -HUGE_VAL
74 #endif
75
76 #define SET_FLOAT_BITS(x, bits) ((fi_type *) (void *) &(x))->i = bits
77
78
79 static const GLfloat ZeroVec[4] = { 0.0F, 0.0F, 0.0F, 0.0F };
80
81
82 /**
83 * Return a pointer to the 4-element float vector specified by the given
84 * source register.
85 */
86 static inline const GLfloat *
87 get_src_register_pointer(const struct prog_src_register *source,
88 const struct gl_program_machine *machine)
89 {
90 const struct gl_program *prog = machine->CurProgram;
91 GLint reg = source->Index;
92
93 if (source->RelAddr) {
94 /* add address register value to src index/offset */
95 reg += machine->AddressReg[0][0];
96 if (reg < 0) {
97 return ZeroVec;
98 }
99 }
100
101 switch (source->File) {
102 case PROGRAM_TEMPORARY:
103 if (reg >= MAX_PROGRAM_TEMPS)
104 return ZeroVec;
105 return machine->Temporaries[reg];
106
107 case PROGRAM_INPUT:
108 if (prog->Target == GL_VERTEX_PROGRAM_ARB) {
109 if (reg >= VERT_ATTRIB_MAX)
110 return ZeroVec;
111 return machine->VertAttribs[reg];
112 }
113 else {
114 if (reg >= FRAG_ATTRIB_MAX)
115 return ZeroVec;
116 return machine->Attribs[reg][machine->CurElement];
117 }
118
119 case PROGRAM_OUTPUT:
120 if (reg >= MAX_PROGRAM_OUTPUTS)
121 return ZeroVec;
122 return machine->Outputs[reg];
123
124 case PROGRAM_LOCAL_PARAM:
125 if (reg >= MAX_PROGRAM_LOCAL_PARAMS)
126 return ZeroVec;
127 return machine->CurProgram->LocalParams[reg];
128
129 case PROGRAM_ENV_PARAM:
130 if (reg >= MAX_PROGRAM_ENV_PARAMS)
131 return ZeroVec;
132 return machine->EnvParams[reg];
133
134 case PROGRAM_STATE_VAR:
135 /* Fallthrough */
136 case PROGRAM_CONSTANT:
137 /* Fallthrough */
138 case PROGRAM_UNIFORM:
139 if (reg >= (GLint) prog->Parameters->NumParameters)
140 return ZeroVec;
141 return (GLfloat *) prog->Parameters->ParameterValues[reg];
142
143 case PROGRAM_SYSTEM_VALUE:
144 assert(reg < Elements(machine->SystemValues));
145 return machine->SystemValues[reg];
146
147 default:
148 _mesa_problem(NULL,
149 "Invalid src register file %d in get_src_register_pointer()",
150 source->File);
151 return NULL;
152 }
153 }
154
155
156 /**
157 * Return a pointer to the 4-element float vector specified by the given
158 * destination register.
159 */
160 static inline GLfloat *
161 get_dst_register_pointer(const struct prog_dst_register *dest,
162 struct gl_program_machine *machine)
163 {
164 static GLfloat dummyReg[4];
165 GLint reg = dest->Index;
166
167 if (dest->RelAddr) {
168 /* add address register value to src index/offset */
169 reg += machine->AddressReg[0][0];
170 if (reg < 0) {
171 return dummyReg;
172 }
173 }
174
175 switch (dest->File) {
176 case PROGRAM_TEMPORARY:
177 if (reg >= MAX_PROGRAM_TEMPS)
178 return dummyReg;
179 return machine->Temporaries[reg];
180
181 case PROGRAM_OUTPUT:
182 if (reg >= MAX_PROGRAM_OUTPUTS)
183 return dummyReg;
184 return machine->Outputs[reg];
185
186 case PROGRAM_WRITE_ONLY:
187 return dummyReg;
188
189 default:
190 _mesa_problem(NULL,
191 "Invalid dest register file %d in get_dst_register_pointer()",
192 dest->File);
193 return NULL;
194 }
195 }
196
197
198
199 /**
200 * Fetch a 4-element float vector from the given source register.
201 * Apply swizzling and negating as needed.
202 */
203 static void
204 fetch_vector4(const struct prog_src_register *source,
205 const struct gl_program_machine *machine, GLfloat result[4])
206 {
207 const GLfloat *src = get_src_register_pointer(source, machine);
208 ASSERT(src);
209
210 if (source->Swizzle == SWIZZLE_NOOP) {
211 /* no swizzling */
212 COPY_4V(result, src);
213 }
214 else {
215 ASSERT(GET_SWZ(source->Swizzle, 0) <= 3);
216 ASSERT(GET_SWZ(source->Swizzle, 1) <= 3);
217 ASSERT(GET_SWZ(source->Swizzle, 2) <= 3);
218 ASSERT(GET_SWZ(source->Swizzle, 3) <= 3);
219 result[0] = src[GET_SWZ(source->Swizzle, 0)];
220 result[1] = src[GET_SWZ(source->Swizzle, 1)];
221 result[2] = src[GET_SWZ(source->Swizzle, 2)];
222 result[3] = src[GET_SWZ(source->Swizzle, 3)];
223 }
224
225 if (source->Abs) {
226 result[0] = FABSF(result[0]);
227 result[1] = FABSF(result[1]);
228 result[2] = FABSF(result[2]);
229 result[3] = FABSF(result[3]);
230 }
231 if (source->Negate) {
232 ASSERT(source->Negate == NEGATE_XYZW);
233 result[0] = -result[0];
234 result[1] = -result[1];
235 result[2] = -result[2];
236 result[3] = -result[3];
237 }
238
239 #ifdef NAN_CHECK
240 assert(!IS_INF_OR_NAN(result[0]));
241 assert(!IS_INF_OR_NAN(result[0]));
242 assert(!IS_INF_OR_NAN(result[0]));
243 assert(!IS_INF_OR_NAN(result[0]));
244 #endif
245 }
246
247
248 /**
249 * Fetch a 4-element uint vector from the given source register.
250 * Apply swizzling but not negation/abs.
251 */
252 static void
253 fetch_vector4ui(const struct prog_src_register *source,
254 const struct gl_program_machine *machine, GLuint result[4])
255 {
256 const GLuint *src = (GLuint *) get_src_register_pointer(source, machine);
257 ASSERT(src);
258
259 if (source->Swizzle == SWIZZLE_NOOP) {
260 /* no swizzling */
261 COPY_4V(result, src);
262 }
263 else {
264 ASSERT(GET_SWZ(source->Swizzle, 0) <= 3);
265 ASSERT(GET_SWZ(source->Swizzle, 1) <= 3);
266 ASSERT(GET_SWZ(source->Swizzle, 2) <= 3);
267 ASSERT(GET_SWZ(source->Swizzle, 3) <= 3);
268 result[0] = src[GET_SWZ(source->Swizzle, 0)];
269 result[1] = src[GET_SWZ(source->Swizzle, 1)];
270 result[2] = src[GET_SWZ(source->Swizzle, 2)];
271 result[3] = src[GET_SWZ(source->Swizzle, 3)];
272 }
273
274 /* Note: no Negate or Abs here */
275 }
276
277
278
279 /**
280 * Fetch the derivative with respect to X or Y for the given register.
281 * XXX this currently only works for fragment program input attribs.
282 */
283 static void
284 fetch_vector4_deriv(struct gl_context * ctx,
285 const struct prog_src_register *source,
286 const struct gl_program_machine *machine,
287 char xOrY, GLfloat result[4])
288 {
289 if (source->File == PROGRAM_INPUT &&
290 source->Index < (GLint) machine->NumDeriv) {
291 const GLint col = machine->CurElement;
292 const GLfloat w = machine->Attribs[FRAG_ATTRIB_WPOS][col][3];
293 const GLfloat invQ = 1.0f / w;
294 GLfloat deriv[4];
295
296 if (xOrY == 'X') {
297 deriv[0] = machine->DerivX[source->Index][0] * invQ;
298 deriv[1] = machine->DerivX[source->Index][1] * invQ;
299 deriv[2] = machine->DerivX[source->Index][2] * invQ;
300 deriv[3] = machine->DerivX[source->Index][3] * invQ;
301 }
302 else {
303 deriv[0] = machine->DerivY[source->Index][0] * invQ;
304 deriv[1] = machine->DerivY[source->Index][1] * invQ;
305 deriv[2] = machine->DerivY[source->Index][2] * invQ;
306 deriv[3] = machine->DerivY[source->Index][3] * invQ;
307 }
308
309 result[0] = deriv[GET_SWZ(source->Swizzle, 0)];
310 result[1] = deriv[GET_SWZ(source->Swizzle, 1)];
311 result[2] = deriv[GET_SWZ(source->Swizzle, 2)];
312 result[3] = deriv[GET_SWZ(source->Swizzle, 3)];
313
314 if (source->Abs) {
315 result[0] = FABSF(result[0]);
316 result[1] = FABSF(result[1]);
317 result[2] = FABSF(result[2]);
318 result[3] = FABSF(result[3]);
319 }
320 if (source->Negate) {
321 ASSERT(source->Negate == NEGATE_XYZW);
322 result[0] = -result[0];
323 result[1] = -result[1];
324 result[2] = -result[2];
325 result[3] = -result[3];
326 }
327 }
328 else {
329 ASSIGN_4V(result, 0.0, 0.0, 0.0, 0.0);
330 }
331 }
332
333
334 /**
335 * As above, but only return result[0] element.
336 */
337 static void
338 fetch_vector1(const struct prog_src_register *source,
339 const struct gl_program_machine *machine, GLfloat result[4])
340 {
341 const GLfloat *src = get_src_register_pointer(source, machine);
342 ASSERT(src);
343
344 result[0] = src[GET_SWZ(source->Swizzle, 0)];
345
346 if (source->Abs) {
347 result[0] = FABSF(result[0]);
348 }
349 if (source->Negate) {
350 result[0] = -result[0];
351 }
352 }
353
354
355 static GLuint
356 fetch_vector1ui(const struct prog_src_register *source,
357 const struct gl_program_machine *machine)
358 {
359 const GLuint *src = (GLuint *) get_src_register_pointer(source, machine);
360 return src[GET_SWZ(source->Swizzle, 0)];
361 }
362
363
364 /**
365 * Fetch texel from texture. Use partial derivatives when possible.
366 */
367 static inline void
368 fetch_texel(struct gl_context *ctx,
369 const struct gl_program_machine *machine,
370 const struct prog_instruction *inst,
371 const GLfloat texcoord[4], GLfloat lodBias,
372 GLfloat color[4])
373 {
374 const GLuint unit = machine->Samplers[inst->TexSrcUnit];
375
376 /* Note: we only have the right derivatives for fragment input attribs.
377 */
378 if (machine->NumDeriv > 0 &&
379 inst->SrcReg[0].File == PROGRAM_INPUT &&
380 inst->SrcReg[0].Index == FRAG_ATTRIB_TEX0 + inst->TexSrcUnit) {
381 /* simple texture fetch for which we should have derivatives */
382 GLuint attr = inst->SrcReg[0].Index;
383 machine->FetchTexelDeriv(ctx, texcoord,
384 machine->DerivX[attr],
385 machine->DerivY[attr],
386 lodBias, unit, color);
387 }
388 else {
389 machine->FetchTexelLod(ctx, texcoord, lodBias, unit, color);
390 }
391 }
392
393
394 /**
395 * Test value against zero and return GT, LT, EQ or UN if NaN.
396 */
397 static inline GLuint
398 generate_cc(float value)
399 {
400 if (value != value)
401 return COND_UN; /* NaN */
402 if (value > 0.0F)
403 return COND_GT;
404 if (value < 0.0F)
405 return COND_LT;
406 return COND_EQ;
407 }
408
409
410 /**
411 * Test if the ccMaskRule is satisfied by the given condition code.
412 * Used to mask destination writes according to the current condition code.
413 */
414 static inline GLboolean
415 test_cc(GLuint condCode, GLuint ccMaskRule)
416 {
417 switch (ccMaskRule) {
418 case COND_EQ: return (condCode == COND_EQ);
419 case COND_NE: return (condCode != COND_EQ);
420 case COND_LT: return (condCode == COND_LT);
421 case COND_GE: return (condCode == COND_GT || condCode == COND_EQ);
422 case COND_LE: return (condCode == COND_LT || condCode == COND_EQ);
423 case COND_GT: return (condCode == COND_GT);
424 case COND_TR: return GL_TRUE;
425 case COND_FL: return GL_FALSE;
426 default: return GL_TRUE;
427 }
428 }
429
430
431 /**
432 * Evaluate the 4 condition codes against a predicate and return GL_TRUE
433 * or GL_FALSE to indicate result.
434 */
435 static inline GLboolean
436 eval_condition(const struct gl_program_machine *machine,
437 const struct prog_instruction *inst)
438 {
439 const GLuint swizzle = inst->DstReg.CondSwizzle;
440 const GLuint condMask = inst->DstReg.CondMask;
441 if (test_cc(machine->CondCodes[GET_SWZ(swizzle, 0)], condMask) ||
442 test_cc(machine->CondCodes[GET_SWZ(swizzle, 1)], condMask) ||
443 test_cc(machine->CondCodes[GET_SWZ(swizzle, 2)], condMask) ||
444 test_cc(machine->CondCodes[GET_SWZ(swizzle, 3)], condMask)) {
445 return GL_TRUE;
446 }
447 else {
448 return GL_FALSE;
449 }
450 }
451
452
453
454 /**
455 * Store 4 floats into a register. Observe the instructions saturate and
456 * set-condition-code flags.
457 */
458 static void
459 store_vector4(const struct prog_instruction *inst,
460 struct gl_program_machine *machine, const GLfloat value[4])
461 {
462 const struct prog_dst_register *dstReg = &(inst->DstReg);
463 const GLboolean clamp = inst->SaturateMode == SATURATE_ZERO_ONE;
464 GLuint writeMask = dstReg->WriteMask;
465 GLfloat clampedValue[4];
466 GLfloat *dst = get_dst_register_pointer(dstReg, machine);
467
468 #if 0
469 if (value[0] > 1.0e10 ||
470 IS_INF_OR_NAN(value[0]) ||
471 IS_INF_OR_NAN(value[1]) ||
472 IS_INF_OR_NAN(value[2]) || IS_INF_OR_NAN(value[3]))
473 printf("store %g %g %g %g\n", value[0], value[1], value[2], value[3]);
474 #endif
475
476 if (clamp) {
477 clampedValue[0] = CLAMP(value[0], 0.0F, 1.0F);
478 clampedValue[1] = CLAMP(value[1], 0.0F, 1.0F);
479 clampedValue[2] = CLAMP(value[2], 0.0F, 1.0F);
480 clampedValue[3] = CLAMP(value[3], 0.0F, 1.0F);
481 value = clampedValue;
482 }
483
484 if (dstReg->CondMask != COND_TR) {
485 /* condition codes may turn off some writes */
486 if (writeMask & WRITEMASK_X) {
487 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 0)],
488 dstReg->CondMask))
489 writeMask &= ~WRITEMASK_X;
490 }
491 if (writeMask & WRITEMASK_Y) {
492 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 1)],
493 dstReg->CondMask))
494 writeMask &= ~WRITEMASK_Y;
495 }
496 if (writeMask & WRITEMASK_Z) {
497 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 2)],
498 dstReg->CondMask))
499 writeMask &= ~WRITEMASK_Z;
500 }
501 if (writeMask & WRITEMASK_W) {
502 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 3)],
503 dstReg->CondMask))
504 writeMask &= ~WRITEMASK_W;
505 }
506 }
507
508 #ifdef NAN_CHECK
509 assert(!IS_INF_OR_NAN(value[0]));
510 assert(!IS_INF_OR_NAN(value[0]));
511 assert(!IS_INF_OR_NAN(value[0]));
512 assert(!IS_INF_OR_NAN(value[0]));
513 #endif
514
515 if (writeMask & WRITEMASK_X)
516 dst[0] = value[0];
517 if (writeMask & WRITEMASK_Y)
518 dst[1] = value[1];
519 if (writeMask & WRITEMASK_Z)
520 dst[2] = value[2];
521 if (writeMask & WRITEMASK_W)
522 dst[3] = value[3];
523
524 if (inst->CondUpdate) {
525 if (writeMask & WRITEMASK_X)
526 machine->CondCodes[0] = generate_cc(value[0]);
527 if (writeMask & WRITEMASK_Y)
528 machine->CondCodes[1] = generate_cc(value[1]);
529 if (writeMask & WRITEMASK_Z)
530 machine->CondCodes[2] = generate_cc(value[2]);
531 if (writeMask & WRITEMASK_W)
532 machine->CondCodes[3] = generate_cc(value[3]);
533 #if DEBUG_PROG
534 printf("CondCodes=(%s,%s,%s,%s) for:\n",
535 _mesa_condcode_string(machine->CondCodes[0]),
536 _mesa_condcode_string(machine->CondCodes[1]),
537 _mesa_condcode_string(machine->CondCodes[2]),
538 _mesa_condcode_string(machine->CondCodes[3]));
539 #endif
540 }
541 }
542
543
544 /**
545 * Store 4 uints into a register. Observe the set-condition-code flags.
546 */
547 static void
548 store_vector4ui(const struct prog_instruction *inst,
549 struct gl_program_machine *machine, const GLuint value[4])
550 {
551 const struct prog_dst_register *dstReg = &(inst->DstReg);
552 GLuint writeMask = dstReg->WriteMask;
553 GLuint *dst = (GLuint *) get_dst_register_pointer(dstReg, machine);
554
555 if (dstReg->CondMask != COND_TR) {
556 /* condition codes may turn off some writes */
557 if (writeMask & WRITEMASK_X) {
558 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 0)],
559 dstReg->CondMask))
560 writeMask &= ~WRITEMASK_X;
561 }
562 if (writeMask & WRITEMASK_Y) {
563 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 1)],
564 dstReg->CondMask))
565 writeMask &= ~WRITEMASK_Y;
566 }
567 if (writeMask & WRITEMASK_Z) {
568 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 2)],
569 dstReg->CondMask))
570 writeMask &= ~WRITEMASK_Z;
571 }
572 if (writeMask & WRITEMASK_W) {
573 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 3)],
574 dstReg->CondMask))
575 writeMask &= ~WRITEMASK_W;
576 }
577 }
578
579 if (writeMask & WRITEMASK_X)
580 dst[0] = value[0];
581 if (writeMask & WRITEMASK_Y)
582 dst[1] = value[1];
583 if (writeMask & WRITEMASK_Z)
584 dst[2] = value[2];
585 if (writeMask & WRITEMASK_W)
586 dst[3] = value[3];
587
588 if (inst->CondUpdate) {
589 if (writeMask & WRITEMASK_X)
590 machine->CondCodes[0] = generate_cc((float)value[0]);
591 if (writeMask & WRITEMASK_Y)
592 machine->CondCodes[1] = generate_cc((float)value[1]);
593 if (writeMask & WRITEMASK_Z)
594 machine->CondCodes[2] = generate_cc((float)value[2]);
595 if (writeMask & WRITEMASK_W)
596 machine->CondCodes[3] = generate_cc((float)value[3]);
597 #if DEBUG_PROG
598 printf("CondCodes=(%s,%s,%s,%s) for:\n",
599 _mesa_condcode_string(machine->CondCodes[0]),
600 _mesa_condcode_string(machine->CondCodes[1]),
601 _mesa_condcode_string(machine->CondCodes[2]),
602 _mesa_condcode_string(machine->CondCodes[3]));
603 #endif
604 }
605 }
606
607
608
609 /**
610 * Execute the given vertex/fragment program.
611 *
612 * \param ctx rendering context
613 * \param program the program to execute
614 * \param machine machine state (must be initialized)
615 * \return GL_TRUE if program completed or GL_FALSE if program executed KIL.
616 */
617 GLboolean
618 _mesa_execute_program(struct gl_context * ctx,
619 const struct gl_program *program,
620 struct gl_program_machine *machine)
621 {
622 const GLuint numInst = program->NumInstructions;
623 const GLuint maxExec = 65536;
624 GLuint pc, numExec = 0;
625
626 machine->CurProgram = program;
627
628 if (DEBUG_PROG) {
629 printf("execute program %u --------------------\n", program->Id);
630 }
631
632 if (program->Target == GL_VERTEX_PROGRAM_ARB) {
633 machine->EnvParams = ctx->VertexProgram.Parameters;
634 }
635 else {
636 machine->EnvParams = ctx->FragmentProgram.Parameters;
637 }
638
639 for (pc = 0; pc < numInst; pc++) {
640 const struct prog_instruction *inst = program->Instructions + pc;
641
642 if (DEBUG_PROG) {
643 _mesa_print_instruction(inst);
644 }
645
646 switch (inst->Opcode) {
647 case OPCODE_ABS:
648 {
649 GLfloat a[4], result[4];
650 fetch_vector4(&inst->SrcReg[0], machine, a);
651 result[0] = FABSF(a[0]);
652 result[1] = FABSF(a[1]);
653 result[2] = FABSF(a[2]);
654 result[3] = FABSF(a[3]);
655 store_vector4(inst, machine, result);
656 }
657 break;
658 case OPCODE_ADD:
659 {
660 GLfloat a[4], b[4], result[4];
661 fetch_vector4(&inst->SrcReg[0], machine, a);
662 fetch_vector4(&inst->SrcReg[1], machine, b);
663 result[0] = a[0] + b[0];
664 result[1] = a[1] + b[1];
665 result[2] = a[2] + b[2];
666 result[3] = a[3] + b[3];
667 store_vector4(inst, machine, result);
668 if (DEBUG_PROG) {
669 printf("ADD (%g %g %g %g) = (%g %g %g %g) + (%g %g %g %g)\n",
670 result[0], result[1], result[2], result[3],
671 a[0], a[1], a[2], a[3], b[0], b[1], b[2], b[3]);
672 }
673 }
674 break;
675 case OPCODE_AND: /* bitwise AND */
676 {
677 GLuint a[4], b[4], result[4];
678 fetch_vector4ui(&inst->SrcReg[0], machine, a);
679 fetch_vector4ui(&inst->SrcReg[1], machine, b);
680 result[0] = a[0] & b[0];
681 result[1] = a[1] & b[1];
682 result[2] = a[2] & b[2];
683 result[3] = a[3] & b[3];
684 store_vector4ui(inst, machine, result);
685 }
686 break;
687 case OPCODE_ARL:
688 {
689 GLfloat t[4];
690 fetch_vector4(&inst->SrcReg[0], machine, t);
691 machine->AddressReg[0][0] = IFLOOR(t[0]);
692 if (DEBUG_PROG) {
693 printf("ARL %d\n", machine->AddressReg[0][0]);
694 }
695 }
696 break;
697 case OPCODE_BGNLOOP:
698 /* no-op */
699 ASSERT(program->Instructions[inst->BranchTarget].Opcode
700 == OPCODE_ENDLOOP);
701 break;
702 case OPCODE_ENDLOOP:
703 /* subtract 1 here since pc is incremented by for(pc) loop */
704 ASSERT(program->Instructions[inst->BranchTarget].Opcode
705 == OPCODE_BGNLOOP);
706 pc = inst->BranchTarget - 1; /* go to matching BNGLOOP */
707 break;
708 case OPCODE_BGNSUB: /* begin subroutine */
709 break;
710 case OPCODE_ENDSUB: /* end subroutine */
711 break;
712 case OPCODE_BRK: /* break out of loop (conditional) */
713 ASSERT(program->Instructions[inst->BranchTarget].Opcode
714 == OPCODE_ENDLOOP);
715 if (eval_condition(machine, inst)) {
716 /* break out of loop */
717 /* pc++ at end of for-loop will put us after the ENDLOOP inst */
718 pc = inst->BranchTarget;
719 }
720 break;
721 case OPCODE_CONT: /* continue loop (conditional) */
722 ASSERT(program->Instructions[inst->BranchTarget].Opcode
723 == OPCODE_ENDLOOP);
724 if (eval_condition(machine, inst)) {
725 /* continue at ENDLOOP */
726 /* Subtract 1 here since we'll do pc++ at end of for-loop */
727 pc = inst->BranchTarget - 1;
728 }
729 break;
730 case OPCODE_CAL: /* Call subroutine (conditional) */
731 if (eval_condition(machine, inst)) {
732 /* call the subroutine */
733 if (machine->StackDepth >= MAX_PROGRAM_CALL_DEPTH) {
734 return GL_TRUE; /* Per GL_NV_vertex_program2 spec */
735 }
736 machine->CallStack[machine->StackDepth++] = pc + 1; /* next inst */
737 /* Subtract 1 here since we'll do pc++ at end of for-loop */
738 pc = inst->BranchTarget - 1;
739 }
740 break;
741 case OPCODE_CMP:
742 {
743 GLfloat a[4], b[4], c[4], result[4];
744 fetch_vector4(&inst->SrcReg[0], machine, a);
745 fetch_vector4(&inst->SrcReg[1], machine, b);
746 fetch_vector4(&inst->SrcReg[2], machine, c);
747 result[0] = a[0] < 0.0F ? b[0] : c[0];
748 result[1] = a[1] < 0.0F ? b[1] : c[1];
749 result[2] = a[2] < 0.0F ? b[2] : c[2];
750 result[3] = a[3] < 0.0F ? b[3] : c[3];
751 store_vector4(inst, machine, result);
752 if (DEBUG_PROG) {
753 printf("CMP (%g %g %g %g) = (%g %g %g %g) < 0 ? (%g %g %g %g) : (%g %g %g %g)\n",
754 result[0], result[1], result[2], result[3],
755 a[0], a[1], a[2], a[3],
756 b[0], b[1], b[2], b[3],
757 c[0], c[1], c[2], c[3]);
758 }
759 }
760 break;
761 case OPCODE_COS:
762 {
763 GLfloat a[4], result[4];
764 fetch_vector1(&inst->SrcReg[0], machine, a);
765 result[0] = result[1] = result[2] = result[3]
766 = (GLfloat) cos(a[0]);
767 store_vector4(inst, machine, result);
768 }
769 break;
770 case OPCODE_DDX: /* Partial derivative with respect to X */
771 {
772 GLfloat result[4];
773 fetch_vector4_deriv(ctx, &inst->SrcReg[0], machine,
774 'X', result);
775 store_vector4(inst, machine, result);
776 }
777 break;
778 case OPCODE_DDY: /* Partial derivative with respect to Y */
779 {
780 GLfloat result[4];
781 fetch_vector4_deriv(ctx, &inst->SrcReg[0], machine,
782 'Y', result);
783 store_vector4(inst, machine, result);
784 }
785 break;
786 case OPCODE_DP2:
787 {
788 GLfloat a[4], b[4], result[4];
789 fetch_vector4(&inst->SrcReg[0], machine, a);
790 fetch_vector4(&inst->SrcReg[1], machine, b);
791 result[0] = result[1] = result[2] = result[3] = DOT2(a, b);
792 store_vector4(inst, machine, result);
793 if (DEBUG_PROG) {
794 printf("DP2 %g = (%g %g) . (%g %g)\n",
795 result[0], a[0], a[1], b[0], b[1]);
796 }
797 }
798 break;
799 case OPCODE_DP2A:
800 {
801 GLfloat a[4], b[4], c, result[4];
802 fetch_vector4(&inst->SrcReg[0], machine, a);
803 fetch_vector4(&inst->SrcReg[1], machine, b);
804 fetch_vector1(&inst->SrcReg[1], machine, &c);
805 result[0] = result[1] = result[2] = result[3] = DOT2(a, b) + c;
806 store_vector4(inst, machine, result);
807 if (DEBUG_PROG) {
808 printf("DP2A %g = (%g %g) . (%g %g) + %g\n",
809 result[0], a[0], a[1], b[0], b[1], c);
810 }
811 }
812 break;
813 case OPCODE_DP3:
814 {
815 GLfloat a[4], b[4], result[4];
816 fetch_vector4(&inst->SrcReg[0], machine, a);
817 fetch_vector4(&inst->SrcReg[1], machine, b);
818 result[0] = result[1] = result[2] = result[3] = DOT3(a, b);
819 store_vector4(inst, machine, result);
820 if (DEBUG_PROG) {
821 printf("DP3 %g = (%g %g %g) . (%g %g %g)\n",
822 result[0], a[0], a[1], a[2], b[0], b[1], b[2]);
823 }
824 }
825 break;
826 case OPCODE_DP4:
827 {
828 GLfloat a[4], b[4], result[4];
829 fetch_vector4(&inst->SrcReg[0], machine, a);
830 fetch_vector4(&inst->SrcReg[1], machine, b);
831 result[0] = result[1] = result[2] = result[3] = DOT4(a, b);
832 store_vector4(inst, machine, result);
833 if (DEBUG_PROG) {
834 printf("DP4 %g = (%g, %g %g %g) . (%g, %g %g %g)\n",
835 result[0], a[0], a[1], a[2], a[3],
836 b[0], b[1], b[2], b[3]);
837 }
838 }
839 break;
840 case OPCODE_DPH:
841 {
842 GLfloat a[4], b[4], result[4];
843 fetch_vector4(&inst->SrcReg[0], machine, a);
844 fetch_vector4(&inst->SrcReg[1], machine, b);
845 result[0] = result[1] = result[2] = result[3] = DOT3(a, b) + b[3];
846 store_vector4(inst, machine, result);
847 }
848 break;
849 case OPCODE_DST: /* Distance vector */
850 {
851 GLfloat a[4], b[4], result[4];
852 fetch_vector4(&inst->SrcReg[0], machine, a);
853 fetch_vector4(&inst->SrcReg[1], machine, b);
854 result[0] = 1.0F;
855 result[1] = a[1] * b[1];
856 result[2] = a[2];
857 result[3] = b[3];
858 store_vector4(inst, machine, result);
859 }
860 break;
861 case OPCODE_EXP:
862 {
863 GLfloat t[4], q[4], floor_t0;
864 fetch_vector1(&inst->SrcReg[0], machine, t);
865 floor_t0 = FLOORF(t[0]);
866 if (floor_t0 > FLT_MAX_EXP) {
867 SET_POS_INFINITY(q[0]);
868 SET_POS_INFINITY(q[2]);
869 }
870 else if (floor_t0 < FLT_MIN_EXP) {
871 q[0] = 0.0F;
872 q[2] = 0.0F;
873 }
874 else {
875 q[0] = LDEXPF(1.0, (int) floor_t0);
876 /* Note: GL_NV_vertex_program expects
877 * result.z = result.x * APPX(result.y)
878 * We do what the ARB extension says.
879 */
880 q[2] = (GLfloat) pow(2.0, t[0]);
881 }
882 q[1] = t[0] - floor_t0;
883 q[3] = 1.0F;
884 store_vector4( inst, machine, q );
885 }
886 break;
887 case OPCODE_EX2: /* Exponential base 2 */
888 {
889 GLfloat a[4], result[4], val;
890 fetch_vector1(&inst->SrcReg[0], machine, a);
891 val = (GLfloat) pow(2.0, a[0]);
892 /*
893 if (IS_INF_OR_NAN(val))
894 val = 1.0e10;
895 */
896 result[0] = result[1] = result[2] = result[3] = val;
897 store_vector4(inst, machine, result);
898 }
899 break;
900 case OPCODE_FLR:
901 {
902 GLfloat a[4], result[4];
903 fetch_vector4(&inst->SrcReg[0], machine, a);
904 result[0] = FLOORF(a[0]);
905 result[1] = FLOORF(a[1]);
906 result[2] = FLOORF(a[2]);
907 result[3] = FLOORF(a[3]);
908 store_vector4(inst, machine, result);
909 }
910 break;
911 case OPCODE_FRC:
912 {
913 GLfloat a[4], result[4];
914 fetch_vector4(&inst->SrcReg[0], machine, a);
915 result[0] = a[0] - FLOORF(a[0]);
916 result[1] = a[1] - FLOORF(a[1]);
917 result[2] = a[2] - FLOORF(a[2]);
918 result[3] = a[3] - FLOORF(a[3]);
919 store_vector4(inst, machine, result);
920 }
921 break;
922 case OPCODE_IF:
923 {
924 GLboolean cond;
925 ASSERT(program->Instructions[inst->BranchTarget].Opcode
926 == OPCODE_ELSE ||
927 program->Instructions[inst->BranchTarget].Opcode
928 == OPCODE_ENDIF);
929 /* eval condition */
930 if (inst->SrcReg[0].File != PROGRAM_UNDEFINED) {
931 GLfloat a[4];
932 fetch_vector1(&inst->SrcReg[0], machine, a);
933 cond = (a[0] != 0.0);
934 }
935 else {
936 cond = eval_condition(machine, inst);
937 }
938 if (DEBUG_PROG) {
939 printf("IF: %d\n", cond);
940 }
941 /* do if/else */
942 if (cond) {
943 /* do if-clause (just continue execution) */
944 }
945 else {
946 /* go to the instruction after ELSE or ENDIF */
947 assert(inst->BranchTarget >= 0);
948 pc = inst->BranchTarget;
949 }
950 }
951 break;
952 case OPCODE_ELSE:
953 /* goto ENDIF */
954 ASSERT(program->Instructions[inst->BranchTarget].Opcode
955 == OPCODE_ENDIF);
956 assert(inst->BranchTarget >= 0);
957 pc = inst->BranchTarget;
958 break;
959 case OPCODE_ENDIF:
960 /* nothing */
961 break;
962 case OPCODE_KIL_NV: /* NV_f_p only (conditional) */
963 if (eval_condition(machine, inst)) {
964 return GL_FALSE;
965 }
966 break;
967 case OPCODE_KIL: /* ARB_f_p only */
968 {
969 GLfloat a[4];
970 fetch_vector4(&inst->SrcReg[0], machine, a);
971 if (DEBUG_PROG) {
972 printf("KIL if (%g %g %g %g) <= 0.0\n",
973 a[0], a[1], a[2], a[3]);
974 }
975
976 if (a[0] < 0.0F || a[1] < 0.0F || a[2] < 0.0F || a[3] < 0.0F) {
977 return GL_FALSE;
978 }
979 }
980 break;
981 case OPCODE_LG2: /* log base 2 */
982 {
983 GLfloat a[4], result[4], val;
984 fetch_vector1(&inst->SrcReg[0], machine, a);
985 /* The fast LOG2 macro doesn't meet the precision requirements.
986 */
987 if (a[0] == 0.0F) {
988 val = -FLT_MAX;
989 }
990 else {
991 val = (float)(log(a[0]) * 1.442695F);
992 }
993 result[0] = result[1] = result[2] = result[3] = val;
994 store_vector4(inst, machine, result);
995 }
996 break;
997 case OPCODE_LIT:
998 {
999 const GLfloat epsilon = 1.0F / 256.0F; /* from NV VP spec */
1000 GLfloat a[4], result[4];
1001 fetch_vector4(&inst->SrcReg[0], machine, a);
1002 a[0] = MAX2(a[0], 0.0F);
1003 a[1] = MAX2(a[1], 0.0F);
1004 /* XXX ARB version clamps a[3], NV version doesn't */
1005 a[3] = CLAMP(a[3], -(128.0F - epsilon), (128.0F - epsilon));
1006 result[0] = 1.0F;
1007 result[1] = a[0];
1008 /* XXX we could probably just use pow() here */
1009 if (a[0] > 0.0F) {
1010 if (a[1] == 0.0 && a[3] == 0.0)
1011 result[2] = 1.0F;
1012 else
1013 result[2] = (GLfloat) pow(a[1], a[3]);
1014 }
1015 else {
1016 result[2] = 0.0F;
1017 }
1018 result[3] = 1.0F;
1019 store_vector4(inst, machine, result);
1020 if (DEBUG_PROG) {
1021 printf("LIT (%g %g %g %g) : (%g %g %g %g)\n",
1022 result[0], result[1], result[2], result[3],
1023 a[0], a[1], a[2], a[3]);
1024 }
1025 }
1026 break;
1027 case OPCODE_LOG:
1028 {
1029 GLfloat t[4], q[4], abs_t0;
1030 fetch_vector1(&inst->SrcReg[0], machine, t);
1031 abs_t0 = FABSF(t[0]);
1032 if (abs_t0 != 0.0F) {
1033 /* Since we really can't handle infinite values on VMS
1034 * like other OSes we'll use __MAXFLOAT to represent
1035 * infinity. This may need some tweaking.
1036 */
1037 #ifdef VMS
1038 if (abs_t0 == __MAXFLOAT)
1039 #else
1040 if (IS_INF_OR_NAN(abs_t0))
1041 #endif
1042 {
1043 SET_POS_INFINITY(q[0]);
1044 q[1] = 1.0F;
1045 SET_POS_INFINITY(q[2]);
1046 }
1047 else {
1048 int exponent;
1049 GLfloat mantissa = FREXPF(t[0], &exponent);
1050 q[0] = (GLfloat) (exponent - 1);
1051 q[1] = (GLfloat) (2.0 * mantissa); /* map [.5, 1) -> [1, 2) */
1052
1053 /* The fast LOG2 macro doesn't meet the precision
1054 * requirements.
1055 */
1056 q[2] = (float)(log(t[0]) * 1.442695F);
1057 }
1058 }
1059 else {
1060 SET_NEG_INFINITY(q[0]);
1061 q[1] = 1.0F;
1062 SET_NEG_INFINITY(q[2]);
1063 }
1064 q[3] = 1.0;
1065 store_vector4(inst, machine, q);
1066 }
1067 break;
1068 case OPCODE_LRP:
1069 {
1070 GLfloat a[4], b[4], c[4], result[4];
1071 fetch_vector4(&inst->SrcReg[0], machine, a);
1072 fetch_vector4(&inst->SrcReg[1], machine, b);
1073 fetch_vector4(&inst->SrcReg[2], machine, c);
1074 result[0] = a[0] * b[0] + (1.0F - a[0]) * c[0];
1075 result[1] = a[1] * b[1] + (1.0F - a[1]) * c[1];
1076 result[2] = a[2] * b[2] + (1.0F - a[2]) * c[2];
1077 result[3] = a[3] * b[3] + (1.0F - a[3]) * c[3];
1078 store_vector4(inst, machine, result);
1079 if (DEBUG_PROG) {
1080 printf("LRP (%g %g %g %g) = (%g %g %g %g), "
1081 "(%g %g %g %g), (%g %g %g %g)\n",
1082 result[0], result[1], result[2], result[3],
1083 a[0], a[1], a[2], a[3],
1084 b[0], b[1], b[2], b[3], c[0], c[1], c[2], c[3]);
1085 }
1086 }
1087 break;
1088 case OPCODE_MAD:
1089 {
1090 GLfloat a[4], b[4], c[4], result[4];
1091 fetch_vector4(&inst->SrcReg[0], machine, a);
1092 fetch_vector4(&inst->SrcReg[1], machine, b);
1093 fetch_vector4(&inst->SrcReg[2], machine, c);
1094 result[0] = a[0] * b[0] + c[0];
1095 result[1] = a[1] * b[1] + c[1];
1096 result[2] = a[2] * b[2] + c[2];
1097 result[3] = a[3] * b[3] + c[3];
1098 store_vector4(inst, machine, result);
1099 if (DEBUG_PROG) {
1100 printf("MAD (%g %g %g %g) = (%g %g %g %g) * "
1101 "(%g %g %g %g) + (%g %g %g %g)\n",
1102 result[0], result[1], result[2], result[3],
1103 a[0], a[1], a[2], a[3],
1104 b[0], b[1], b[2], b[3], c[0], c[1], c[2], c[3]);
1105 }
1106 }
1107 break;
1108 case OPCODE_MAX:
1109 {
1110 GLfloat a[4], b[4], result[4];
1111 fetch_vector4(&inst->SrcReg[0], machine, a);
1112 fetch_vector4(&inst->SrcReg[1], machine, b);
1113 result[0] = MAX2(a[0], b[0]);
1114 result[1] = MAX2(a[1], b[1]);
1115 result[2] = MAX2(a[2], b[2]);
1116 result[3] = MAX2(a[3], b[3]);
1117 store_vector4(inst, machine, result);
1118 if (DEBUG_PROG) {
1119 printf("MAX (%g %g %g %g) = (%g %g %g %g), (%g %g %g %g)\n",
1120 result[0], result[1], result[2], result[3],
1121 a[0], a[1], a[2], a[3], b[0], b[1], b[2], b[3]);
1122 }
1123 }
1124 break;
1125 case OPCODE_MIN:
1126 {
1127 GLfloat a[4], b[4], result[4];
1128 fetch_vector4(&inst->SrcReg[0], machine, a);
1129 fetch_vector4(&inst->SrcReg[1], machine, b);
1130 result[0] = MIN2(a[0], b[0]);
1131 result[1] = MIN2(a[1], b[1]);
1132 result[2] = MIN2(a[2], b[2]);
1133 result[3] = MIN2(a[3], b[3]);
1134 store_vector4(inst, machine, result);
1135 }
1136 break;
1137 case OPCODE_MOV:
1138 {
1139 GLfloat result[4];
1140 fetch_vector4(&inst->SrcReg[0], machine, result);
1141 store_vector4(inst, machine, result);
1142 if (DEBUG_PROG) {
1143 printf("MOV (%g %g %g %g)\n",
1144 result[0], result[1], result[2], result[3]);
1145 }
1146 }
1147 break;
1148 case OPCODE_MUL:
1149 {
1150 GLfloat a[4], b[4], result[4];
1151 fetch_vector4(&inst->SrcReg[0], machine, a);
1152 fetch_vector4(&inst->SrcReg[1], machine, b);
1153 result[0] = a[0] * b[0];
1154 result[1] = a[1] * b[1];
1155 result[2] = a[2] * b[2];
1156 result[3] = a[3] * b[3];
1157 store_vector4(inst, machine, result);
1158 if (DEBUG_PROG) {
1159 printf("MUL (%g %g %g %g) = (%g %g %g %g) * (%g %g %g %g)\n",
1160 result[0], result[1], result[2], result[3],
1161 a[0], a[1], a[2], a[3], b[0], b[1], b[2], b[3]);
1162 }
1163 }
1164 break;
1165 case OPCODE_NOISE1:
1166 {
1167 GLfloat a[4], result[4];
1168 fetch_vector1(&inst->SrcReg[0], machine, a);
1169 result[0] =
1170 result[1] =
1171 result[2] =
1172 result[3] = _mesa_noise1(a[0]);
1173 store_vector4(inst, machine, result);
1174 }
1175 break;
1176 case OPCODE_NOISE2:
1177 {
1178 GLfloat a[4], result[4];
1179 fetch_vector4(&inst->SrcReg[0], machine, a);
1180 result[0] =
1181 result[1] =
1182 result[2] = result[3] = _mesa_noise2(a[0], a[1]);
1183 store_vector4(inst, machine, result);
1184 }
1185 break;
1186 case OPCODE_NOISE3:
1187 {
1188 GLfloat a[4], result[4];
1189 fetch_vector4(&inst->SrcReg[0], machine, a);
1190 result[0] =
1191 result[1] =
1192 result[2] =
1193 result[3] = _mesa_noise3(a[0], a[1], a[2]);
1194 store_vector4(inst, machine, result);
1195 }
1196 break;
1197 case OPCODE_NOISE4:
1198 {
1199 GLfloat a[4], result[4];
1200 fetch_vector4(&inst->SrcReg[0], machine, a);
1201 result[0] =
1202 result[1] =
1203 result[2] =
1204 result[3] = _mesa_noise4(a[0], a[1], a[2], a[3]);
1205 store_vector4(inst, machine, result);
1206 }
1207 break;
1208 case OPCODE_NOP:
1209 break;
1210 case OPCODE_NOT: /* bitwise NOT */
1211 {
1212 GLuint a[4], result[4];
1213 fetch_vector4ui(&inst->SrcReg[0], machine, a);
1214 result[0] = ~a[0];
1215 result[1] = ~a[1];
1216 result[2] = ~a[2];
1217 result[3] = ~a[3];
1218 store_vector4ui(inst, machine, result);
1219 }
1220 break;
1221 case OPCODE_NRM3: /* 3-component normalization */
1222 {
1223 GLfloat a[4], result[4];
1224 GLfloat tmp;
1225 fetch_vector4(&inst->SrcReg[0], machine, a);
1226 tmp = a[0] * a[0] + a[1] * a[1] + a[2] * a[2];
1227 if (tmp != 0.0F)
1228 tmp = INV_SQRTF(tmp);
1229 result[0] = tmp * a[0];
1230 result[1] = tmp * a[1];
1231 result[2] = tmp * a[2];
1232 result[3] = 0.0; /* undefined, but prevent valgrind warnings */
1233 store_vector4(inst, machine, result);
1234 }
1235 break;
1236 case OPCODE_NRM4: /* 4-component normalization */
1237 {
1238 GLfloat a[4], result[4];
1239 GLfloat tmp;
1240 fetch_vector4(&inst->SrcReg[0], machine, a);
1241 tmp = a[0] * a[0] + a[1] * a[1] + a[2] * a[2] + a[3] * a[3];
1242 if (tmp != 0.0F)
1243 tmp = INV_SQRTF(tmp);
1244 result[0] = tmp * a[0];
1245 result[1] = tmp * a[1];
1246 result[2] = tmp * a[2];
1247 result[3] = tmp * a[3];
1248 store_vector4(inst, machine, result);
1249 }
1250 break;
1251 case OPCODE_OR: /* bitwise OR */
1252 {
1253 GLuint a[4], b[4], result[4];
1254 fetch_vector4ui(&inst->SrcReg[0], machine, a);
1255 fetch_vector4ui(&inst->SrcReg[1], machine, b);
1256 result[0] = a[0] | b[0];
1257 result[1] = a[1] | b[1];
1258 result[2] = a[2] | b[2];
1259 result[3] = a[3] | b[3];
1260 store_vector4ui(inst, machine, result);
1261 }
1262 break;
1263 case OPCODE_PK2H: /* pack two 16-bit floats in one 32-bit float */
1264 {
1265 GLfloat a[4];
1266 GLuint result[4];
1267 GLhalfNV hx, hy;
1268 fetch_vector4(&inst->SrcReg[0], machine, a);
1269 hx = _mesa_float_to_half(a[0]);
1270 hy = _mesa_float_to_half(a[1]);
1271 result[0] =
1272 result[1] =
1273 result[2] =
1274 result[3] = hx | (hy << 16);
1275 store_vector4ui(inst, machine, result);
1276 }
1277 break;
1278 case OPCODE_PK2US: /* pack two GLushorts into one 32-bit float */
1279 {
1280 GLfloat a[4];
1281 GLuint result[4], usx, usy;
1282 fetch_vector4(&inst->SrcReg[0], machine, a);
1283 a[0] = CLAMP(a[0], 0.0F, 1.0F);
1284 a[1] = CLAMP(a[1], 0.0F, 1.0F);
1285 usx = F_TO_I(a[0] * 65535.0F);
1286 usy = F_TO_I(a[1] * 65535.0F);
1287 result[0] =
1288 result[1] =
1289 result[2] =
1290 result[3] = usx | (usy << 16);
1291 store_vector4ui(inst, machine, result);
1292 }
1293 break;
1294 case OPCODE_PK4B: /* pack four GLbytes into one 32-bit float */
1295 {
1296 GLfloat a[4];
1297 GLuint result[4], ubx, uby, ubz, ubw;
1298 fetch_vector4(&inst->SrcReg[0], machine, a);
1299 a[0] = CLAMP(a[0], -128.0F / 127.0F, 1.0F);
1300 a[1] = CLAMP(a[1], -128.0F / 127.0F, 1.0F);
1301 a[2] = CLAMP(a[2], -128.0F / 127.0F, 1.0F);
1302 a[3] = CLAMP(a[3], -128.0F / 127.0F, 1.0F);
1303 ubx = F_TO_I(127.0F * a[0] + 128.0F);
1304 uby = F_TO_I(127.0F * a[1] + 128.0F);
1305 ubz = F_TO_I(127.0F * a[2] + 128.0F);
1306 ubw = F_TO_I(127.0F * a[3] + 128.0F);
1307 result[0] =
1308 result[1] =
1309 result[2] =
1310 result[3] = ubx | (uby << 8) | (ubz << 16) | (ubw << 24);
1311 store_vector4ui(inst, machine, result);
1312 }
1313 break;
1314 case OPCODE_PK4UB: /* pack four GLubytes into one 32-bit float */
1315 {
1316 GLfloat a[4];
1317 GLuint result[4], ubx, uby, ubz, ubw;
1318 fetch_vector4(&inst->SrcReg[0], machine, a);
1319 a[0] = CLAMP(a[0], 0.0F, 1.0F);
1320 a[1] = CLAMP(a[1], 0.0F, 1.0F);
1321 a[2] = CLAMP(a[2], 0.0F, 1.0F);
1322 a[3] = CLAMP(a[3], 0.0F, 1.0F);
1323 ubx = F_TO_I(255.0F * a[0]);
1324 uby = F_TO_I(255.0F * a[1]);
1325 ubz = F_TO_I(255.0F * a[2]);
1326 ubw = F_TO_I(255.0F * a[3]);
1327 result[0] =
1328 result[1] =
1329 result[2] =
1330 result[3] = ubx | (uby << 8) | (ubz << 16) | (ubw << 24);
1331 store_vector4ui(inst, machine, result);
1332 }
1333 break;
1334 case OPCODE_POW:
1335 {
1336 GLfloat a[4], b[4], result[4];
1337 fetch_vector1(&inst->SrcReg[0], machine, a);
1338 fetch_vector1(&inst->SrcReg[1], machine, b);
1339 result[0] = result[1] = result[2] = result[3]
1340 = (GLfloat) pow(a[0], b[0]);
1341 store_vector4(inst, machine, result);
1342 }
1343 break;
1344
1345 case OPCODE_RCP:
1346 {
1347 GLfloat a[4], result[4];
1348 fetch_vector1(&inst->SrcReg[0], machine, a);
1349 if (DEBUG_PROG) {
1350 if (a[0] == 0)
1351 printf("RCP(0)\n");
1352 else if (IS_INF_OR_NAN(a[0]))
1353 printf("RCP(inf)\n");
1354 }
1355 result[0] = result[1] = result[2] = result[3] = 1.0F / a[0];
1356 store_vector4(inst, machine, result);
1357 }
1358 break;
1359 case OPCODE_RET: /* return from subroutine (conditional) */
1360 if (eval_condition(machine, inst)) {
1361 if (machine->StackDepth == 0) {
1362 return GL_TRUE; /* Per GL_NV_vertex_program2 spec */
1363 }
1364 /* subtract one because of pc++ in the for loop */
1365 pc = machine->CallStack[--machine->StackDepth] - 1;
1366 }
1367 break;
1368 case OPCODE_RFL: /* reflection vector */
1369 {
1370 GLfloat axis[4], dir[4], result[4], tmpX, tmpW;
1371 fetch_vector4(&inst->SrcReg[0], machine, axis);
1372 fetch_vector4(&inst->SrcReg[1], machine, dir);
1373 tmpW = DOT3(axis, axis);
1374 tmpX = (2.0F * DOT3(axis, dir)) / tmpW;
1375 result[0] = tmpX * axis[0] - dir[0];
1376 result[1] = tmpX * axis[1] - dir[1];
1377 result[2] = tmpX * axis[2] - dir[2];
1378 /* result[3] is never written! XXX enforce in parser! */
1379 store_vector4(inst, machine, result);
1380 }
1381 break;
1382 case OPCODE_RSQ: /* 1 / sqrt() */
1383 {
1384 GLfloat a[4], result[4];
1385 fetch_vector1(&inst->SrcReg[0], machine, a);
1386 a[0] = FABSF(a[0]);
1387 result[0] = result[1] = result[2] = result[3] = INV_SQRTF(a[0]);
1388 store_vector4(inst, machine, result);
1389 if (DEBUG_PROG) {
1390 printf("RSQ %g = 1/sqrt(|%g|)\n", result[0], a[0]);
1391 }
1392 }
1393 break;
1394 case OPCODE_SCS: /* sine and cos */
1395 {
1396 GLfloat a[4], result[4];
1397 fetch_vector1(&inst->SrcReg[0], machine, a);
1398 result[0] = (GLfloat) cos(a[0]);
1399 result[1] = (GLfloat) sin(a[0]);
1400 result[2] = 0.0; /* undefined! */
1401 result[3] = 0.0; /* undefined! */
1402 store_vector4(inst, machine, result);
1403 }
1404 break;
1405 case OPCODE_SEQ: /* set on equal */
1406 {
1407 GLfloat a[4], b[4], result[4];
1408 fetch_vector4(&inst->SrcReg[0], machine, a);
1409 fetch_vector4(&inst->SrcReg[1], machine, b);
1410 result[0] = (a[0] == b[0]) ? 1.0F : 0.0F;
1411 result[1] = (a[1] == b[1]) ? 1.0F : 0.0F;
1412 result[2] = (a[2] == b[2]) ? 1.0F : 0.0F;
1413 result[3] = (a[3] == b[3]) ? 1.0F : 0.0F;
1414 store_vector4(inst, machine, result);
1415 if (DEBUG_PROG) {
1416 printf("SEQ (%g %g %g %g) = (%g %g %g %g) == (%g %g %g %g)\n",
1417 result[0], result[1], result[2], result[3],
1418 a[0], a[1], a[2], a[3],
1419 b[0], b[1], b[2], b[3]);
1420 }
1421 }
1422 break;
1423 case OPCODE_SFL: /* set false, operands ignored */
1424 {
1425 static const GLfloat result[4] = { 0.0F, 0.0F, 0.0F, 0.0F };
1426 store_vector4(inst, machine, result);
1427 }
1428 break;
1429 case OPCODE_SGE: /* set on greater or equal */
1430 {
1431 GLfloat a[4], b[4], result[4];
1432 fetch_vector4(&inst->SrcReg[0], machine, a);
1433 fetch_vector4(&inst->SrcReg[1], machine, b);
1434 result[0] = (a[0] >= b[0]) ? 1.0F : 0.0F;
1435 result[1] = (a[1] >= b[1]) ? 1.0F : 0.0F;
1436 result[2] = (a[2] >= b[2]) ? 1.0F : 0.0F;
1437 result[3] = (a[3] >= b[3]) ? 1.0F : 0.0F;
1438 store_vector4(inst, machine, result);
1439 if (DEBUG_PROG) {
1440 printf("SGE (%g %g %g %g) = (%g %g %g %g) >= (%g %g %g %g)\n",
1441 result[0], result[1], result[2], result[3],
1442 a[0], a[1], a[2], a[3],
1443 b[0], b[1], b[2], b[3]);
1444 }
1445 }
1446 break;
1447 case OPCODE_SGT: /* set on greater */
1448 {
1449 GLfloat a[4], b[4], result[4];
1450 fetch_vector4(&inst->SrcReg[0], machine, a);
1451 fetch_vector4(&inst->SrcReg[1], machine, b);
1452 result[0] = (a[0] > b[0]) ? 1.0F : 0.0F;
1453 result[1] = (a[1] > b[1]) ? 1.0F : 0.0F;
1454 result[2] = (a[2] > b[2]) ? 1.0F : 0.0F;
1455 result[3] = (a[3] > b[3]) ? 1.0F : 0.0F;
1456 store_vector4(inst, machine, result);
1457 if (DEBUG_PROG) {
1458 printf("SGT (%g %g %g %g) = (%g %g %g %g) > (%g %g %g %g)\n",
1459 result[0], result[1], result[2], result[3],
1460 a[0], a[1], a[2], a[3],
1461 b[0], b[1], b[2], b[3]);
1462 }
1463 }
1464 break;
1465 case OPCODE_SIN:
1466 {
1467 GLfloat a[4], result[4];
1468 fetch_vector1(&inst->SrcReg[0], machine, a);
1469 result[0] = result[1] = result[2] = result[3]
1470 = (GLfloat) sin(a[0]);
1471 store_vector4(inst, machine, result);
1472 }
1473 break;
1474 case OPCODE_SLE: /* set on less or equal */
1475 {
1476 GLfloat a[4], b[4], result[4];
1477 fetch_vector4(&inst->SrcReg[0], machine, a);
1478 fetch_vector4(&inst->SrcReg[1], machine, b);
1479 result[0] = (a[0] <= b[0]) ? 1.0F : 0.0F;
1480 result[1] = (a[1] <= b[1]) ? 1.0F : 0.0F;
1481 result[2] = (a[2] <= b[2]) ? 1.0F : 0.0F;
1482 result[3] = (a[3] <= b[3]) ? 1.0F : 0.0F;
1483 store_vector4(inst, machine, result);
1484 if (DEBUG_PROG) {
1485 printf("SLE (%g %g %g %g) = (%g %g %g %g) <= (%g %g %g %g)\n",
1486 result[0], result[1], result[2], result[3],
1487 a[0], a[1], a[2], a[3],
1488 b[0], b[1], b[2], b[3]);
1489 }
1490 }
1491 break;
1492 case OPCODE_SLT: /* set on less */
1493 {
1494 GLfloat a[4], b[4], result[4];
1495 fetch_vector4(&inst->SrcReg[0], machine, a);
1496 fetch_vector4(&inst->SrcReg[1], machine, b);
1497 result[0] = (a[0] < b[0]) ? 1.0F : 0.0F;
1498 result[1] = (a[1] < b[1]) ? 1.0F : 0.0F;
1499 result[2] = (a[2] < b[2]) ? 1.0F : 0.0F;
1500 result[3] = (a[3] < b[3]) ? 1.0F : 0.0F;
1501 store_vector4(inst, machine, result);
1502 if (DEBUG_PROG) {
1503 printf("SLT (%g %g %g %g) = (%g %g %g %g) < (%g %g %g %g)\n",
1504 result[0], result[1], result[2], result[3],
1505 a[0], a[1], a[2], a[3],
1506 b[0], b[1], b[2], b[3]);
1507 }
1508 }
1509 break;
1510 case OPCODE_SNE: /* set on not equal */
1511 {
1512 GLfloat a[4], b[4], result[4];
1513 fetch_vector4(&inst->SrcReg[0], machine, a);
1514 fetch_vector4(&inst->SrcReg[1], machine, b);
1515 result[0] = (a[0] != b[0]) ? 1.0F : 0.0F;
1516 result[1] = (a[1] != b[1]) ? 1.0F : 0.0F;
1517 result[2] = (a[2] != b[2]) ? 1.0F : 0.0F;
1518 result[3] = (a[3] != b[3]) ? 1.0F : 0.0F;
1519 store_vector4(inst, machine, result);
1520 if (DEBUG_PROG) {
1521 printf("SNE (%g %g %g %g) = (%g %g %g %g) != (%g %g %g %g)\n",
1522 result[0], result[1], result[2], result[3],
1523 a[0], a[1], a[2], a[3],
1524 b[0], b[1], b[2], b[3]);
1525 }
1526 }
1527 break;
1528 case OPCODE_SSG: /* set sign (-1, 0 or +1) */
1529 {
1530 GLfloat a[4], result[4];
1531 fetch_vector4(&inst->SrcReg[0], machine, a);
1532 result[0] = (GLfloat) ((a[0] > 0.0F) - (a[0] < 0.0F));
1533 result[1] = (GLfloat) ((a[1] > 0.0F) - (a[1] < 0.0F));
1534 result[2] = (GLfloat) ((a[2] > 0.0F) - (a[2] < 0.0F));
1535 result[3] = (GLfloat) ((a[3] > 0.0F) - (a[3] < 0.0F));
1536 store_vector4(inst, machine, result);
1537 }
1538 break;
1539 case OPCODE_STR: /* set true, operands ignored */
1540 {
1541 static const GLfloat result[4] = { 1.0F, 1.0F, 1.0F, 1.0F };
1542 store_vector4(inst, machine, result);
1543 }
1544 break;
1545 case OPCODE_SUB:
1546 {
1547 GLfloat a[4], b[4], result[4];
1548 fetch_vector4(&inst->SrcReg[0], machine, a);
1549 fetch_vector4(&inst->SrcReg[1], machine, b);
1550 result[0] = a[0] - b[0];
1551 result[1] = a[1] - b[1];
1552 result[2] = a[2] - b[2];
1553 result[3] = a[3] - b[3];
1554 store_vector4(inst, machine, result);
1555 if (DEBUG_PROG) {
1556 printf("SUB (%g %g %g %g) = (%g %g %g %g) - (%g %g %g %g)\n",
1557 result[0], result[1], result[2], result[3],
1558 a[0], a[1], a[2], a[3], b[0], b[1], b[2], b[3]);
1559 }
1560 }
1561 break;
1562 case OPCODE_SWZ: /* extended swizzle */
1563 {
1564 const struct prog_src_register *source = &inst->SrcReg[0];
1565 const GLfloat *src = get_src_register_pointer(source, machine);
1566 GLfloat result[4];
1567 GLuint i;
1568 for (i = 0; i < 4; i++) {
1569 const GLuint swz = GET_SWZ(source->Swizzle, i);
1570 if (swz == SWIZZLE_ZERO)
1571 result[i] = 0.0;
1572 else if (swz == SWIZZLE_ONE)
1573 result[i] = 1.0;
1574 else {
1575 ASSERT(swz >= 0);
1576 ASSERT(swz <= 3);
1577 result[i] = src[swz];
1578 }
1579 if (source->Negate & (1 << i))
1580 result[i] = -result[i];
1581 }
1582 store_vector4(inst, machine, result);
1583 }
1584 break;
1585 case OPCODE_TEX: /* Both ARB and NV frag prog */
1586 /* Simple texel lookup */
1587 {
1588 GLfloat texcoord[4], color[4];
1589 fetch_vector4(&inst->SrcReg[0], machine, texcoord);
1590
1591 /* For TEX, texcoord.Q should not be used and its value should not
1592 * matter (at most, we pass coord.xyz to texture3D() in GLSL).
1593 * Set Q=1 so that FetchTexelDeriv() doesn't get a garbage value
1594 * which is effectively what happens when the texcoord swizzle
1595 * is .xyzz
1596 */
1597 texcoord[3] = 1.0f;
1598
1599 fetch_texel(ctx, machine, inst, texcoord, 0.0, color);
1600
1601 if (DEBUG_PROG) {
1602 printf("TEX (%g, %g, %g, %g) = texture[%d][%g, %g, %g, %g]\n",
1603 color[0], color[1], color[2], color[3],
1604 inst->TexSrcUnit,
1605 texcoord[0], texcoord[1], texcoord[2], texcoord[3]);
1606 }
1607 store_vector4(inst, machine, color);
1608 }
1609 break;
1610 case OPCODE_TXB: /* GL_ARB_fragment_program only */
1611 /* Texel lookup with LOD bias */
1612 {
1613 GLfloat texcoord[4], color[4], lodBias;
1614
1615 fetch_vector4(&inst->SrcReg[0], machine, texcoord);
1616
1617 /* texcoord[3] is the bias to add to lambda */
1618 lodBias = texcoord[3];
1619
1620 fetch_texel(ctx, machine, inst, texcoord, lodBias, color);
1621
1622 if (DEBUG_PROG) {
1623 printf("TXB (%g, %g, %g, %g) = texture[%d][%g %g %g %g]"
1624 " bias %g\n",
1625 color[0], color[1], color[2], color[3],
1626 inst->TexSrcUnit,
1627 texcoord[0],
1628 texcoord[1],
1629 texcoord[2],
1630 texcoord[3],
1631 lodBias);
1632 }
1633
1634 store_vector4(inst, machine, color);
1635 }
1636 break;
1637 case OPCODE_TXD: /* GL_NV_fragment_program only */
1638 /* Texture lookup w/ partial derivatives for LOD */
1639 {
1640 GLfloat texcoord[4], dtdx[4], dtdy[4], color[4];
1641 fetch_vector4(&inst->SrcReg[0], machine, texcoord);
1642 fetch_vector4(&inst->SrcReg[1], machine, dtdx);
1643 fetch_vector4(&inst->SrcReg[2], machine, dtdy);
1644 machine->FetchTexelDeriv(ctx, texcoord, dtdx, dtdy,
1645 0.0, /* lodBias */
1646 inst->TexSrcUnit, color);
1647 store_vector4(inst, machine, color);
1648 }
1649 break;
1650 case OPCODE_TXL:
1651 /* Texel lookup with explicit LOD */
1652 {
1653 GLfloat texcoord[4], color[4], lod;
1654
1655 fetch_vector4(&inst->SrcReg[0], machine, texcoord);
1656
1657 /* texcoord[3] is the LOD */
1658 lod = texcoord[3];
1659
1660 machine->FetchTexelLod(ctx, texcoord, lod,
1661 machine->Samplers[inst->TexSrcUnit], color);
1662
1663 store_vector4(inst, machine, color);
1664 }
1665 break;
1666 case OPCODE_TXP: /* GL_ARB_fragment_program only */
1667 /* Texture lookup w/ projective divide */
1668 {
1669 GLfloat texcoord[4], color[4];
1670
1671 fetch_vector4(&inst->SrcReg[0], machine, texcoord);
1672 /* Not so sure about this test - if texcoord[3] is
1673 * zero, we'd probably be fine except for an ASSERT in
1674 * IROUND_POS() which gets triggered by the inf values created.
1675 */
1676 if (texcoord[3] != 0.0) {
1677 texcoord[0] /= texcoord[3];
1678 texcoord[1] /= texcoord[3];
1679 texcoord[2] /= texcoord[3];
1680 }
1681
1682 fetch_texel(ctx, machine, inst, texcoord, 0.0, color);
1683
1684 store_vector4(inst, machine, color);
1685 }
1686 break;
1687 case OPCODE_TXP_NV: /* GL_NV_fragment_program only */
1688 /* Texture lookup w/ projective divide, as above, but do not
1689 * do the divide by w if sampling from a cube map.
1690 */
1691 {
1692 GLfloat texcoord[4], color[4];
1693
1694 fetch_vector4(&inst->SrcReg[0], machine, texcoord);
1695 if (inst->TexSrcTarget != TEXTURE_CUBE_INDEX &&
1696 texcoord[3] != 0.0) {
1697 texcoord[0] /= texcoord[3];
1698 texcoord[1] /= texcoord[3];
1699 texcoord[2] /= texcoord[3];
1700 }
1701
1702 fetch_texel(ctx, machine, inst, texcoord, 0.0, color);
1703
1704 store_vector4(inst, machine, color);
1705 }
1706 break;
1707 case OPCODE_TRUNC: /* truncate toward zero */
1708 {
1709 GLfloat a[4], result[4];
1710 fetch_vector4(&inst->SrcReg[0], machine, a);
1711 result[0] = (GLfloat) (GLint) a[0];
1712 result[1] = (GLfloat) (GLint) a[1];
1713 result[2] = (GLfloat) (GLint) a[2];
1714 result[3] = (GLfloat) (GLint) a[3];
1715 store_vector4(inst, machine, result);
1716 }
1717 break;
1718 case OPCODE_UP2H: /* unpack two 16-bit floats */
1719 {
1720 const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine);
1721 GLfloat result[4];
1722 GLushort hx, hy;
1723 hx = raw & 0xffff;
1724 hy = raw >> 16;
1725 result[0] = result[2] = _mesa_half_to_float(hx);
1726 result[1] = result[3] = _mesa_half_to_float(hy);
1727 store_vector4(inst, machine, result);
1728 }
1729 break;
1730 case OPCODE_UP2US: /* unpack two GLushorts */
1731 {
1732 const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine);
1733 GLfloat result[4];
1734 GLushort usx, usy;
1735 usx = raw & 0xffff;
1736 usy = raw >> 16;
1737 result[0] = result[2] = usx * (1.0f / 65535.0f);
1738 result[1] = result[3] = usy * (1.0f / 65535.0f);
1739 store_vector4(inst, machine, result);
1740 }
1741 break;
1742 case OPCODE_UP4B: /* unpack four GLbytes */
1743 {
1744 const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine);
1745 GLfloat result[4];
1746 result[0] = (((raw >> 0) & 0xff) - 128) / 127.0F;
1747 result[1] = (((raw >> 8) & 0xff) - 128) / 127.0F;
1748 result[2] = (((raw >> 16) & 0xff) - 128) / 127.0F;
1749 result[3] = (((raw >> 24) & 0xff) - 128) / 127.0F;
1750 store_vector4(inst, machine, result);
1751 }
1752 break;
1753 case OPCODE_UP4UB: /* unpack four GLubytes */
1754 {
1755 const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine);
1756 GLfloat result[4];
1757 result[0] = ((raw >> 0) & 0xff) / 255.0F;
1758 result[1] = ((raw >> 8) & 0xff) / 255.0F;
1759 result[2] = ((raw >> 16) & 0xff) / 255.0F;
1760 result[3] = ((raw >> 24) & 0xff) / 255.0F;
1761 store_vector4(inst, machine, result);
1762 }
1763 break;
1764 case OPCODE_XOR: /* bitwise XOR */
1765 {
1766 GLuint a[4], b[4], result[4];
1767 fetch_vector4ui(&inst->SrcReg[0], machine, a);
1768 fetch_vector4ui(&inst->SrcReg[1], machine, b);
1769 result[0] = a[0] ^ b[0];
1770 result[1] = a[1] ^ b[1];
1771 result[2] = a[2] ^ b[2];
1772 result[3] = a[3] ^ b[3];
1773 store_vector4ui(inst, machine, result);
1774 }
1775 break;
1776 case OPCODE_XPD: /* cross product */
1777 {
1778 GLfloat a[4], b[4], result[4];
1779 fetch_vector4(&inst->SrcReg[0], machine, a);
1780 fetch_vector4(&inst->SrcReg[1], machine, b);
1781 result[0] = a[1] * b[2] - a[2] * b[1];
1782 result[1] = a[2] * b[0] - a[0] * b[2];
1783 result[2] = a[0] * b[1] - a[1] * b[0];
1784 result[3] = 1.0;
1785 store_vector4(inst, machine, result);
1786 if (DEBUG_PROG) {
1787 printf("XPD (%g %g %g %g) = (%g %g %g) X (%g %g %g)\n",
1788 result[0], result[1], result[2], result[3],
1789 a[0], a[1], a[2], b[0], b[1], b[2]);
1790 }
1791 }
1792 break;
1793 case OPCODE_X2D: /* 2-D matrix transform */
1794 {
1795 GLfloat a[4], b[4], c[4], result[4];
1796 fetch_vector4(&inst->SrcReg[0], machine, a);
1797 fetch_vector4(&inst->SrcReg[1], machine, b);
1798 fetch_vector4(&inst->SrcReg[2], machine, c);
1799 result[0] = a[0] + b[0] * c[0] + b[1] * c[1];
1800 result[1] = a[1] + b[0] * c[2] + b[1] * c[3];
1801 result[2] = a[2] + b[0] * c[0] + b[1] * c[1];
1802 result[3] = a[3] + b[0] * c[2] + b[1] * c[3];
1803 store_vector4(inst, machine, result);
1804 }
1805 break;
1806 case OPCODE_PRINT:
1807 {
1808 if (inst->SrcReg[0].File != PROGRAM_UNDEFINED) {
1809 GLfloat a[4];
1810 fetch_vector4(&inst->SrcReg[0], machine, a);
1811 printf("%s%g, %g, %g, %g\n", (const char *) inst->Data,
1812 a[0], a[1], a[2], a[3]);
1813 }
1814 else {
1815 printf("%s\n", (const char *) inst->Data);
1816 }
1817 }
1818 break;
1819 case OPCODE_END:
1820 return GL_TRUE;
1821 default:
1822 _mesa_problem(ctx, "Bad opcode %d in _mesa_execute_program",
1823 inst->Opcode);
1824 return GL_TRUE; /* return value doesn't matter */
1825 }
1826
1827 numExec++;
1828 if (numExec > maxExec) {
1829 static GLboolean reported = GL_FALSE;
1830 if (!reported) {
1831 _mesa_problem(ctx, "Infinite loop detected in fragment program");
1832 reported = GL_TRUE;
1833 }
1834 return GL_TRUE;
1835 }
1836
1837 } /* for pc */
1838
1839 return GL_TRUE;
1840 }