2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2008 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.
26 * \file prog_execute.c
27 * Software interpreter for vertex/fragment programs.
32 * NOTE: we do everything in single-precision floating point; we don't
33 * currently observe the single/half/fixed-precision qualifiers.
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"
53 * Set x to positive or negative infinity.
55 #if defined(USE_IEEE) || defined(_WIN32)
56 #define SET_POS_INFINITY(x) \
62 #define SET_NEG_INFINITY(x) \
69 #define SET_POS_INFINITY(x) x = (GLfloat) HUGE_VAL
70 #define SET_NEG_INFINITY(x) x = (GLfloat) -HUGE_VAL
73 #define SET_FLOAT_BITS(x, bits) ((fi_type *) (void *) &(x))->i = bits
76 static const GLfloat ZeroVec[4] = { 0.0F, 0.0F, 0.0F, 0.0F };
80 * Return a pointer to the 4-element float vector specified by the given
83 static inline const GLfloat *
84 get_src_register_pointer(const struct prog_src_register *source,
85 const struct gl_program_machine *machine)
87 const struct gl_program *prog = machine->CurProgram;
88 GLint reg = source->Index;
90 if (source->RelAddr) {
91 /* add address register value to src index/offset */
92 reg += machine->AddressReg[0][0];
98 switch (source->File) {
99 case PROGRAM_TEMPORARY:
100 if (reg >= MAX_PROGRAM_TEMPS)
102 return machine->Temporaries[reg];
105 if (prog->Target == GL_VERTEX_PROGRAM_ARB) {
106 if (reg >= VERT_ATTRIB_MAX)
108 return machine->VertAttribs[reg];
111 if (reg >= VARYING_SLOT_MAX)
113 return machine->Attribs[reg][machine->CurElement];
117 if (reg >= MAX_PROGRAM_OUTPUTS)
119 return machine->Outputs[reg];
121 case PROGRAM_LOCAL_PARAM:
122 if (reg >= MAX_PROGRAM_LOCAL_PARAMS)
124 return machine->CurProgram->LocalParams[reg];
126 case PROGRAM_ENV_PARAM:
127 if (reg >= MAX_PROGRAM_ENV_PARAMS)
129 return machine->EnvParams[reg];
131 case PROGRAM_STATE_VAR:
133 case PROGRAM_CONSTANT:
135 case PROGRAM_UNIFORM:
136 if (reg >= (GLint) prog->Parameters->NumParameters)
138 return (GLfloat *) prog->Parameters->ParameterValues[reg];
140 case PROGRAM_SYSTEM_VALUE:
141 assert(reg < Elements(machine->SystemValues));
142 return machine->SystemValues[reg];
146 "Invalid src register file %d in get_src_register_pointer()",
154 * Return a pointer to the 4-element float vector specified by the given
155 * destination register.
157 static inline GLfloat *
158 get_dst_register_pointer(const struct prog_dst_register *dest,
159 struct gl_program_machine *machine)
161 static GLfloat dummyReg[4];
162 GLint reg = dest->Index;
165 /* add address register value to src index/offset */
166 reg += machine->AddressReg[0][0];
172 switch (dest->File) {
173 case PROGRAM_TEMPORARY:
174 if (reg >= MAX_PROGRAM_TEMPS)
176 return machine->Temporaries[reg];
179 if (reg >= MAX_PROGRAM_OUTPUTS)
181 return machine->Outputs[reg];
185 "Invalid dest register file %d in get_dst_register_pointer()",
194 * Fetch a 4-element float vector from the given source register.
195 * Apply swizzling and negating as needed.
198 fetch_vector4(const struct prog_src_register *source,
199 const struct gl_program_machine *machine, GLfloat result[4])
201 const GLfloat *src = get_src_register_pointer(source, machine);
204 if (source->Swizzle == SWIZZLE_NOOP) {
206 COPY_4V(result, src);
209 ASSERT(GET_SWZ(source->Swizzle, 0) <= 3);
210 ASSERT(GET_SWZ(source->Swizzle, 1) <= 3);
211 ASSERT(GET_SWZ(source->Swizzle, 2) <= 3);
212 ASSERT(GET_SWZ(source->Swizzle, 3) <= 3);
213 result[0] = src[GET_SWZ(source->Swizzle, 0)];
214 result[1] = src[GET_SWZ(source->Swizzle, 1)];
215 result[2] = src[GET_SWZ(source->Swizzle, 2)];
216 result[3] = src[GET_SWZ(source->Swizzle, 3)];
220 result[0] = FABSF(result[0]);
221 result[1] = FABSF(result[1]);
222 result[2] = FABSF(result[2]);
223 result[3] = FABSF(result[3]);
225 if (source->Negate) {
226 ASSERT(source->Negate == NEGATE_XYZW);
227 result[0] = -result[0];
228 result[1] = -result[1];
229 result[2] = -result[2];
230 result[3] = -result[3];
234 assert(!IS_INF_OR_NAN(result[0]));
235 assert(!IS_INF_OR_NAN(result[0]));
236 assert(!IS_INF_OR_NAN(result[0]));
237 assert(!IS_INF_OR_NAN(result[0]));
243 * Fetch the derivative with respect to X or Y for the given register.
244 * XXX this currently only works for fragment program input attribs.
247 fetch_vector4_deriv(struct gl_context * ctx,
248 const struct prog_src_register *source,
249 const struct gl_program_machine *machine,
250 char xOrY, GLfloat result[4])
252 if (source->File == PROGRAM_INPUT &&
253 source->Index < (GLint) machine->NumDeriv) {
254 const GLint col = machine->CurElement;
255 const GLfloat w = machine->Attribs[VARYING_SLOT_POS][col][3];
256 const GLfloat invQ = 1.0f / w;
260 deriv[0] = machine->DerivX[source->Index][0] * invQ;
261 deriv[1] = machine->DerivX[source->Index][1] * invQ;
262 deriv[2] = machine->DerivX[source->Index][2] * invQ;
263 deriv[3] = machine->DerivX[source->Index][3] * invQ;
266 deriv[0] = machine->DerivY[source->Index][0] * invQ;
267 deriv[1] = machine->DerivY[source->Index][1] * invQ;
268 deriv[2] = machine->DerivY[source->Index][2] * invQ;
269 deriv[3] = machine->DerivY[source->Index][3] * invQ;
272 result[0] = deriv[GET_SWZ(source->Swizzle, 0)];
273 result[1] = deriv[GET_SWZ(source->Swizzle, 1)];
274 result[2] = deriv[GET_SWZ(source->Swizzle, 2)];
275 result[3] = deriv[GET_SWZ(source->Swizzle, 3)];
278 result[0] = FABSF(result[0]);
279 result[1] = FABSF(result[1]);
280 result[2] = FABSF(result[2]);
281 result[3] = FABSF(result[3]);
283 if (source->Negate) {
284 ASSERT(source->Negate == NEGATE_XYZW);
285 result[0] = -result[0];
286 result[1] = -result[1];
287 result[2] = -result[2];
288 result[3] = -result[3];
292 ASSIGN_4V(result, 0.0, 0.0, 0.0, 0.0);
298 * As above, but only return result[0] element.
301 fetch_vector1(const struct prog_src_register *source,
302 const struct gl_program_machine *machine, GLfloat result[4])
304 const GLfloat *src = get_src_register_pointer(source, machine);
307 result[0] = src[GET_SWZ(source->Swizzle, 0)];
310 result[0] = FABSF(result[0]);
312 if (source->Negate) {
313 result[0] = -result[0];
319 fetch_vector1ui(const struct prog_src_register *source,
320 const struct gl_program_machine *machine)
322 const GLuint *src = (GLuint *) get_src_register_pointer(source, machine);
323 return src[GET_SWZ(source->Swizzle, 0)];
328 * Fetch texel from texture. Use partial derivatives when possible.
331 fetch_texel(struct gl_context *ctx,
332 const struct gl_program_machine *machine,
333 const struct prog_instruction *inst,
334 const GLfloat texcoord[4], GLfloat lodBias,
337 const GLuint unit = machine->Samplers[inst->TexSrcUnit];
339 /* Note: we only have the right derivatives for fragment input attribs.
341 if (machine->NumDeriv > 0 &&
342 inst->SrcReg[0].File == PROGRAM_INPUT &&
343 inst->SrcReg[0].Index == VARYING_SLOT_TEX0 + inst->TexSrcUnit) {
344 /* simple texture fetch for which we should have derivatives */
345 GLuint attr = inst->SrcReg[0].Index;
346 machine->FetchTexelDeriv(ctx, texcoord,
347 machine->DerivX[attr],
348 machine->DerivY[attr],
349 lodBias, unit, color);
352 machine->FetchTexelLod(ctx, texcoord, lodBias, unit, color);
358 * Test value against zero and return GT, LT, EQ or UN if NaN.
361 generate_cc(float value)
364 return COND_UN; /* NaN */
374 * Test if the ccMaskRule is satisfied by the given condition code.
375 * Used to mask destination writes according to the current condition code.
377 static inline GLboolean
378 test_cc(GLuint condCode, GLuint ccMaskRule)
380 switch (ccMaskRule) {
381 case COND_EQ: return (condCode == COND_EQ);
382 case COND_NE: return (condCode != COND_EQ);
383 case COND_LT: return (condCode == COND_LT);
384 case COND_GE: return (condCode == COND_GT || condCode == COND_EQ);
385 case COND_LE: return (condCode == COND_LT || condCode == COND_EQ);
386 case COND_GT: return (condCode == COND_GT);
387 case COND_TR: return GL_TRUE;
388 case COND_FL: return GL_FALSE;
389 default: return GL_TRUE;
395 * Evaluate the 4 condition codes against a predicate and return GL_TRUE
396 * or GL_FALSE to indicate result.
398 static inline GLboolean
399 eval_condition(const struct gl_program_machine *machine,
400 const struct prog_instruction *inst)
402 const GLuint swizzle = inst->DstReg.CondSwizzle;
403 const GLuint condMask = inst->DstReg.CondMask;
404 if (test_cc(machine->CondCodes[GET_SWZ(swizzle, 0)], condMask) ||
405 test_cc(machine->CondCodes[GET_SWZ(swizzle, 1)], condMask) ||
406 test_cc(machine->CondCodes[GET_SWZ(swizzle, 2)], condMask) ||
407 test_cc(machine->CondCodes[GET_SWZ(swizzle, 3)], condMask)) {
418 * Store 4 floats into a register. Observe the instructions saturate and
419 * set-condition-code flags.
422 store_vector4(const struct prog_instruction *inst,
423 struct gl_program_machine *machine, const GLfloat value[4])
425 const struct prog_dst_register *dstReg = &(inst->DstReg);
426 const GLboolean clamp = inst->SaturateMode == SATURATE_ZERO_ONE;
427 GLuint writeMask = dstReg->WriteMask;
428 GLfloat clampedValue[4];
429 GLfloat *dst = get_dst_register_pointer(dstReg, machine);
432 if (value[0] > 1.0e10 ||
433 IS_INF_OR_NAN(value[0]) ||
434 IS_INF_OR_NAN(value[1]) ||
435 IS_INF_OR_NAN(value[2]) || IS_INF_OR_NAN(value[3]))
436 printf("store %g %g %g %g\n", value[0], value[1], value[2], value[3]);
440 clampedValue[0] = CLAMP(value[0], 0.0F, 1.0F);
441 clampedValue[1] = CLAMP(value[1], 0.0F, 1.0F);
442 clampedValue[2] = CLAMP(value[2], 0.0F, 1.0F);
443 clampedValue[3] = CLAMP(value[3], 0.0F, 1.0F);
444 value = clampedValue;
447 if (dstReg->CondMask != COND_TR) {
448 /* condition codes may turn off some writes */
449 if (writeMask & WRITEMASK_X) {
450 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 0)],
452 writeMask &= ~WRITEMASK_X;
454 if (writeMask & WRITEMASK_Y) {
455 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 1)],
457 writeMask &= ~WRITEMASK_Y;
459 if (writeMask & WRITEMASK_Z) {
460 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 2)],
462 writeMask &= ~WRITEMASK_Z;
464 if (writeMask & WRITEMASK_W) {
465 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 3)],
467 writeMask &= ~WRITEMASK_W;
472 assert(!IS_INF_OR_NAN(value[0]));
473 assert(!IS_INF_OR_NAN(value[0]));
474 assert(!IS_INF_OR_NAN(value[0]));
475 assert(!IS_INF_OR_NAN(value[0]));
478 if (writeMask & WRITEMASK_X)
480 if (writeMask & WRITEMASK_Y)
482 if (writeMask & WRITEMASK_Z)
484 if (writeMask & WRITEMASK_W)
487 if (inst->CondUpdate) {
488 if (writeMask & WRITEMASK_X)
489 machine->CondCodes[0] = generate_cc(value[0]);
490 if (writeMask & WRITEMASK_Y)
491 machine->CondCodes[1] = generate_cc(value[1]);
492 if (writeMask & WRITEMASK_Z)
493 machine->CondCodes[2] = generate_cc(value[2]);
494 if (writeMask & WRITEMASK_W)
495 machine->CondCodes[3] = generate_cc(value[3]);
497 printf("CondCodes=(%s,%s,%s,%s) for:\n",
498 _mesa_condcode_string(machine->CondCodes[0]),
499 _mesa_condcode_string(machine->CondCodes[1]),
500 _mesa_condcode_string(machine->CondCodes[2]),
501 _mesa_condcode_string(machine->CondCodes[3]));
508 * Store 4 uints into a register. Observe the set-condition-code flags.
511 store_vector4ui(const struct prog_instruction *inst,
512 struct gl_program_machine *machine, const GLuint value[4])
514 const struct prog_dst_register *dstReg = &(inst->DstReg);
515 GLuint writeMask = dstReg->WriteMask;
516 GLuint *dst = (GLuint *) get_dst_register_pointer(dstReg, machine);
518 if (dstReg->CondMask != COND_TR) {
519 /* condition codes may turn off some writes */
520 if (writeMask & WRITEMASK_X) {
521 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 0)],
523 writeMask &= ~WRITEMASK_X;
525 if (writeMask & WRITEMASK_Y) {
526 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 1)],
528 writeMask &= ~WRITEMASK_Y;
530 if (writeMask & WRITEMASK_Z) {
531 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 2)],
533 writeMask &= ~WRITEMASK_Z;
535 if (writeMask & WRITEMASK_W) {
536 if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 3)],
538 writeMask &= ~WRITEMASK_W;
542 if (writeMask & WRITEMASK_X)
544 if (writeMask & WRITEMASK_Y)
546 if (writeMask & WRITEMASK_Z)
548 if (writeMask & WRITEMASK_W)
551 if (inst->CondUpdate) {
552 if (writeMask & WRITEMASK_X)
553 machine->CondCodes[0] = generate_cc((float)value[0]);
554 if (writeMask & WRITEMASK_Y)
555 machine->CondCodes[1] = generate_cc((float)value[1]);
556 if (writeMask & WRITEMASK_Z)
557 machine->CondCodes[2] = generate_cc((float)value[2]);
558 if (writeMask & WRITEMASK_W)
559 machine->CondCodes[3] = generate_cc((float)value[3]);
561 printf("CondCodes=(%s,%s,%s,%s) for:\n",
562 _mesa_condcode_string(machine->CondCodes[0]),
563 _mesa_condcode_string(machine->CondCodes[1]),
564 _mesa_condcode_string(machine->CondCodes[2]),
565 _mesa_condcode_string(machine->CondCodes[3]));
573 * Execute the given vertex/fragment program.
575 * \param ctx rendering context
576 * \param program the program to execute
577 * \param machine machine state (must be initialized)
578 * \return GL_TRUE if program completed or GL_FALSE if program executed KIL.
581 _mesa_execute_program(struct gl_context * ctx,
582 const struct gl_program *program,
583 struct gl_program_machine *machine)
585 const GLuint numInst = program->NumInstructions;
586 const GLuint maxExec = 65536;
587 GLuint pc, numExec = 0;
589 machine->CurProgram = program;
592 printf("execute program %u --------------------\n", program->Id);
595 if (program->Target == GL_VERTEX_PROGRAM_ARB) {
596 machine->EnvParams = ctx->VertexProgram.Parameters;
599 machine->EnvParams = ctx->FragmentProgram.Parameters;
602 for (pc = 0; pc < numInst; pc++) {
603 const struct prog_instruction *inst = program->Instructions + pc;
606 _mesa_print_instruction(inst);
609 switch (inst->Opcode) {
612 GLfloat a[4], result[4];
613 fetch_vector4(&inst->SrcReg[0], machine, a);
614 result[0] = FABSF(a[0]);
615 result[1] = FABSF(a[1]);
616 result[2] = FABSF(a[2]);
617 result[3] = FABSF(a[3]);
618 store_vector4(inst, machine, result);
623 GLfloat a[4], b[4], result[4];
624 fetch_vector4(&inst->SrcReg[0], machine, a);
625 fetch_vector4(&inst->SrcReg[1], machine, b);
626 result[0] = a[0] + b[0];
627 result[1] = a[1] + b[1];
628 result[2] = a[2] + b[2];
629 result[3] = a[3] + b[3];
630 store_vector4(inst, machine, result);
632 printf("ADD (%g %g %g %g) = (%g %g %g %g) + (%g %g %g %g)\n",
633 result[0], result[1], result[2], result[3],
634 a[0], a[1], a[2], a[3], b[0], b[1], b[2], b[3]);
641 fetch_vector4(&inst->SrcReg[0], machine, t);
642 machine->AddressReg[0][0] = IFLOOR(t[0]);
644 printf("ARL %d\n", machine->AddressReg[0][0]);
650 ASSERT(program->Instructions[inst->BranchTarget].Opcode
654 /* subtract 1 here since pc is incremented by for(pc) loop */
655 ASSERT(program->Instructions[inst->BranchTarget].Opcode
657 pc = inst->BranchTarget - 1; /* go to matching BNGLOOP */
659 case OPCODE_BGNSUB: /* begin subroutine */
661 case OPCODE_ENDSUB: /* end subroutine */
663 case OPCODE_BRK: /* break out of loop (conditional) */
664 ASSERT(program->Instructions[inst->BranchTarget].Opcode
666 if (eval_condition(machine, inst)) {
667 /* break out of loop */
668 /* pc++ at end of for-loop will put us after the ENDLOOP inst */
669 pc = inst->BranchTarget;
672 case OPCODE_CONT: /* continue loop (conditional) */
673 ASSERT(program->Instructions[inst->BranchTarget].Opcode
675 if (eval_condition(machine, inst)) {
676 /* continue at ENDLOOP */
677 /* Subtract 1 here since we'll do pc++ at end of for-loop */
678 pc = inst->BranchTarget - 1;
681 case OPCODE_CAL: /* Call subroutine (conditional) */
682 if (eval_condition(machine, inst)) {
683 /* call the subroutine */
684 if (machine->StackDepth >= MAX_PROGRAM_CALL_DEPTH) {
685 return GL_TRUE; /* Per GL_NV_vertex_program2 spec */
687 machine->CallStack[machine->StackDepth++] = pc + 1; /* next inst */
688 /* Subtract 1 here since we'll do pc++ at end of for-loop */
689 pc = inst->BranchTarget - 1;
694 GLfloat a[4], b[4], c[4], result[4];
695 fetch_vector4(&inst->SrcReg[0], machine, a);
696 fetch_vector4(&inst->SrcReg[1], machine, b);
697 fetch_vector4(&inst->SrcReg[2], machine, c);
698 result[0] = a[0] < 0.0F ? b[0] : c[0];
699 result[1] = a[1] < 0.0F ? b[1] : c[1];
700 result[2] = a[2] < 0.0F ? b[2] : c[2];
701 result[3] = a[3] < 0.0F ? b[3] : c[3];
702 store_vector4(inst, machine, result);
704 printf("CMP (%g %g %g %g) = (%g %g %g %g) < 0 ? (%g %g %g %g) : (%g %g %g %g)\n",
705 result[0], result[1], result[2], result[3],
706 a[0], a[1], a[2], a[3],
707 b[0], b[1], b[2], b[3],
708 c[0], c[1], c[2], c[3]);
714 GLfloat a[4], result[4];
715 fetch_vector1(&inst->SrcReg[0], machine, a);
716 result[0] = result[1] = result[2] = result[3]
717 = (GLfloat) cos(a[0]);
718 store_vector4(inst, machine, result);
721 case OPCODE_DDX: /* Partial derivative with respect to X */
724 fetch_vector4_deriv(ctx, &inst->SrcReg[0], machine,
726 store_vector4(inst, machine, result);
729 case OPCODE_DDY: /* Partial derivative with respect to Y */
732 fetch_vector4_deriv(ctx, &inst->SrcReg[0], machine,
734 store_vector4(inst, machine, result);
739 GLfloat a[4], b[4], result[4];
740 fetch_vector4(&inst->SrcReg[0], machine, a);
741 fetch_vector4(&inst->SrcReg[1], machine, b);
742 result[0] = result[1] = result[2] = result[3] = DOT2(a, b);
743 store_vector4(inst, machine, result);
745 printf("DP2 %g = (%g %g) . (%g %g)\n",
746 result[0], a[0], a[1], b[0], b[1]);
752 GLfloat a[4], b[4], result[4];
753 fetch_vector4(&inst->SrcReg[0], machine, a);
754 fetch_vector4(&inst->SrcReg[1], machine, b);
755 result[0] = result[1] = result[2] = result[3] = DOT3(a, b);
756 store_vector4(inst, machine, result);
758 printf("DP3 %g = (%g %g %g) . (%g %g %g)\n",
759 result[0], a[0], a[1], a[2], b[0], b[1], b[2]);
765 GLfloat a[4], b[4], result[4];
766 fetch_vector4(&inst->SrcReg[0], machine, a);
767 fetch_vector4(&inst->SrcReg[1], machine, b);
768 result[0] = result[1] = result[2] = result[3] = DOT4(a, b);
769 store_vector4(inst, machine, result);
771 printf("DP4 %g = (%g, %g %g %g) . (%g, %g %g %g)\n",
772 result[0], a[0], a[1], a[2], a[3],
773 b[0], b[1], b[2], b[3]);
779 GLfloat a[4], b[4], result[4];
780 fetch_vector4(&inst->SrcReg[0], machine, a);
781 fetch_vector4(&inst->SrcReg[1], machine, b);
782 result[0] = result[1] = result[2] = result[3] = DOT3(a, b) + b[3];
783 store_vector4(inst, machine, result);
786 case OPCODE_DST: /* Distance vector */
788 GLfloat a[4], b[4], result[4];
789 fetch_vector4(&inst->SrcReg[0], machine, a);
790 fetch_vector4(&inst->SrcReg[1], machine, b);
792 result[1] = a[1] * b[1];
795 store_vector4(inst, machine, result);
800 GLfloat t[4], q[4], floor_t0;
801 fetch_vector1(&inst->SrcReg[0], machine, t);
802 floor_t0 = FLOORF(t[0]);
803 if (floor_t0 > FLT_MAX_EXP) {
804 SET_POS_INFINITY(q[0]);
805 SET_POS_INFINITY(q[2]);
807 else if (floor_t0 < FLT_MIN_EXP) {
812 q[0] = LDEXPF(1.0, (int) floor_t0);
813 /* Note: GL_NV_vertex_program expects
814 * result.z = result.x * APPX(result.y)
815 * We do what the ARB extension says.
817 q[2] = (GLfloat) pow(2.0, t[0]);
819 q[1] = t[0] - floor_t0;
821 store_vector4( inst, machine, q );
824 case OPCODE_EX2: /* Exponential base 2 */
826 GLfloat a[4], result[4], val;
827 fetch_vector1(&inst->SrcReg[0], machine, a);
828 val = (GLfloat) pow(2.0, a[0]);
830 if (IS_INF_OR_NAN(val))
833 result[0] = result[1] = result[2] = result[3] = val;
834 store_vector4(inst, machine, result);
839 GLfloat a[4], result[4];
840 fetch_vector4(&inst->SrcReg[0], machine, a);
841 result[0] = FLOORF(a[0]);
842 result[1] = FLOORF(a[1]);
843 result[2] = FLOORF(a[2]);
844 result[3] = FLOORF(a[3]);
845 store_vector4(inst, machine, result);
850 GLfloat a[4], result[4];
851 fetch_vector4(&inst->SrcReg[0], machine, a);
852 result[0] = a[0] - FLOORF(a[0]);
853 result[1] = a[1] - FLOORF(a[1]);
854 result[2] = a[2] - FLOORF(a[2]);
855 result[3] = a[3] - FLOORF(a[3]);
856 store_vector4(inst, machine, result);
862 ASSERT(program->Instructions[inst->BranchTarget].Opcode
864 program->Instructions[inst->BranchTarget].Opcode
867 if (inst->SrcReg[0].File != PROGRAM_UNDEFINED) {
869 fetch_vector1(&inst->SrcReg[0], machine, a);
870 cond = (a[0] != 0.0);
873 cond = eval_condition(machine, inst);
876 printf("IF: %d\n", cond);
880 /* do if-clause (just continue execution) */
883 /* go to the instruction after ELSE or ENDIF */
884 assert(inst->BranchTarget >= 0);
885 pc = inst->BranchTarget;
891 ASSERT(program->Instructions[inst->BranchTarget].Opcode
893 assert(inst->BranchTarget >= 0);
894 pc = inst->BranchTarget;
899 case OPCODE_KIL_NV: /* NV_f_p only (conditional) */
900 if (eval_condition(machine, inst)) {
904 case OPCODE_KIL: /* ARB_f_p only */
907 fetch_vector4(&inst->SrcReg[0], machine, a);
909 printf("KIL if (%g %g %g %g) <= 0.0\n",
910 a[0], a[1], a[2], a[3]);
913 if (a[0] < 0.0F || a[1] < 0.0F || a[2] < 0.0F || a[3] < 0.0F) {
918 case OPCODE_LG2: /* log base 2 */
920 GLfloat a[4], result[4], val;
921 fetch_vector1(&inst->SrcReg[0], machine, a);
922 /* The fast LOG2 macro doesn't meet the precision requirements.
928 val = (float)(log(a[0]) * 1.442695F);
930 result[0] = result[1] = result[2] = result[3] = val;
931 store_vector4(inst, machine, result);
936 const GLfloat epsilon = 1.0F / 256.0F; /* from NV VP spec */
937 GLfloat a[4], result[4];
938 fetch_vector4(&inst->SrcReg[0], machine, a);
939 a[0] = MAX2(a[0], 0.0F);
940 a[1] = MAX2(a[1], 0.0F);
941 /* XXX ARB version clamps a[3], NV version doesn't */
942 a[3] = CLAMP(a[3], -(128.0F - epsilon), (128.0F - epsilon));
945 /* XXX we could probably just use pow() here */
947 if (a[1] == 0.0 && a[3] == 0.0)
950 result[2] = (GLfloat) pow(a[1], a[3]);
956 store_vector4(inst, machine, result);
958 printf("LIT (%g %g %g %g) : (%g %g %g %g)\n",
959 result[0], result[1], result[2], result[3],
960 a[0], a[1], a[2], a[3]);
966 GLfloat t[4], q[4], abs_t0;
967 fetch_vector1(&inst->SrcReg[0], machine, t);
968 abs_t0 = FABSF(t[0]);
969 if (abs_t0 != 0.0F) {
970 if (IS_INF_OR_NAN(abs_t0))
972 SET_POS_INFINITY(q[0]);
974 SET_POS_INFINITY(q[2]);
978 GLfloat mantissa = FREXPF(t[0], &exponent);
979 q[0] = (GLfloat) (exponent - 1);
980 q[1] = (GLfloat) (2.0 * mantissa); /* map [.5, 1) -> [1, 2) */
982 /* The fast LOG2 macro doesn't meet the precision
985 q[2] = (float)(log(t[0]) * 1.442695F);
989 SET_NEG_INFINITY(q[0]);
991 SET_NEG_INFINITY(q[2]);
994 store_vector4(inst, machine, q);
999 GLfloat a[4], b[4], c[4], result[4];
1000 fetch_vector4(&inst->SrcReg[0], machine, a);
1001 fetch_vector4(&inst->SrcReg[1], machine, b);
1002 fetch_vector4(&inst->SrcReg[2], machine, c);
1003 result[0] = a[0] * b[0] + (1.0F - a[0]) * c[0];
1004 result[1] = a[1] * b[1] + (1.0F - a[1]) * c[1];
1005 result[2] = a[2] * b[2] + (1.0F - a[2]) * c[2];
1006 result[3] = a[3] * b[3] + (1.0F - a[3]) * c[3];
1007 store_vector4(inst, machine, result);
1009 printf("LRP (%g %g %g %g) = (%g %g %g %g), "
1010 "(%g %g %g %g), (%g %g %g %g)\n",
1011 result[0], result[1], result[2], result[3],
1012 a[0], a[1], a[2], a[3],
1013 b[0], b[1], b[2], b[3], c[0], c[1], c[2], c[3]);
1019 GLfloat a[4], b[4], c[4], result[4];
1020 fetch_vector4(&inst->SrcReg[0], machine, a);
1021 fetch_vector4(&inst->SrcReg[1], machine, b);
1022 fetch_vector4(&inst->SrcReg[2], machine, c);
1023 result[0] = a[0] * b[0] + c[0];
1024 result[1] = a[1] * b[1] + c[1];
1025 result[2] = a[2] * b[2] + c[2];
1026 result[3] = a[3] * b[3] + c[3];
1027 store_vector4(inst, machine, result);
1029 printf("MAD (%g %g %g %g) = (%g %g %g %g) * "
1030 "(%g %g %g %g) + (%g %g %g %g)\n",
1031 result[0], result[1], result[2], result[3],
1032 a[0], a[1], a[2], a[3],
1033 b[0], b[1], b[2], b[3], c[0], c[1], c[2], c[3]);
1039 GLfloat a[4], b[4], result[4];
1040 fetch_vector4(&inst->SrcReg[0], machine, a);
1041 fetch_vector4(&inst->SrcReg[1], machine, b);
1042 result[0] = MAX2(a[0], b[0]);
1043 result[1] = MAX2(a[1], b[1]);
1044 result[2] = MAX2(a[2], b[2]);
1045 result[3] = MAX2(a[3], b[3]);
1046 store_vector4(inst, machine, result);
1048 printf("MAX (%g %g %g %g) = (%g %g %g %g), (%g %g %g %g)\n",
1049 result[0], result[1], result[2], result[3],
1050 a[0], a[1], a[2], a[3], b[0], b[1], b[2], b[3]);
1056 GLfloat a[4], b[4], result[4];
1057 fetch_vector4(&inst->SrcReg[0], machine, a);
1058 fetch_vector4(&inst->SrcReg[1], machine, b);
1059 result[0] = MIN2(a[0], b[0]);
1060 result[1] = MIN2(a[1], b[1]);
1061 result[2] = MIN2(a[2], b[2]);
1062 result[3] = MIN2(a[3], b[3]);
1063 store_vector4(inst, machine, result);
1069 fetch_vector4(&inst->SrcReg[0], machine, result);
1070 store_vector4(inst, machine, result);
1072 printf("MOV (%g %g %g %g)\n",
1073 result[0], result[1], result[2], result[3]);
1079 GLfloat a[4], b[4], result[4];
1080 fetch_vector4(&inst->SrcReg[0], machine, a);
1081 fetch_vector4(&inst->SrcReg[1], machine, b);
1082 result[0] = a[0] * b[0];
1083 result[1] = a[1] * b[1];
1084 result[2] = a[2] * b[2];
1085 result[3] = a[3] * b[3];
1086 store_vector4(inst, machine, result);
1088 printf("MUL (%g %g %g %g) = (%g %g %g %g) * (%g %g %g %g)\n",
1089 result[0], result[1], result[2], result[3],
1090 a[0], a[1], a[2], a[3], b[0], b[1], b[2], b[3]);
1096 GLfloat a[4], result[4];
1097 fetch_vector1(&inst->SrcReg[0], machine, a);
1101 result[3] = _mesa_noise1(a[0]);
1102 store_vector4(inst, machine, result);
1107 GLfloat a[4], result[4];
1108 fetch_vector4(&inst->SrcReg[0], machine, a);
1111 result[2] = result[3] = _mesa_noise2(a[0], a[1]);
1112 store_vector4(inst, machine, result);
1117 GLfloat a[4], result[4];
1118 fetch_vector4(&inst->SrcReg[0], machine, a);
1122 result[3] = _mesa_noise3(a[0], a[1], a[2]);
1123 store_vector4(inst, machine, result);
1128 GLfloat a[4], result[4];
1129 fetch_vector4(&inst->SrcReg[0], machine, a);
1133 result[3] = _mesa_noise4(a[0], a[1], a[2], a[3]);
1134 store_vector4(inst, machine, result);
1139 case OPCODE_PK2H: /* pack two 16-bit floats in one 32-bit float */
1144 fetch_vector4(&inst->SrcReg[0], machine, a);
1145 hx = _mesa_float_to_half(a[0]);
1146 hy = _mesa_float_to_half(a[1]);
1150 result[3] = hx | (hy << 16);
1151 store_vector4ui(inst, machine, result);
1154 case OPCODE_PK2US: /* pack two GLushorts into one 32-bit float */
1157 GLuint result[4], usx, usy;
1158 fetch_vector4(&inst->SrcReg[0], machine, a);
1159 a[0] = CLAMP(a[0], 0.0F, 1.0F);
1160 a[1] = CLAMP(a[1], 0.0F, 1.0F);
1161 usx = F_TO_I(a[0] * 65535.0F);
1162 usy = F_TO_I(a[1] * 65535.0F);
1166 result[3] = usx | (usy << 16);
1167 store_vector4ui(inst, machine, result);
1170 case OPCODE_PK4B: /* pack four GLbytes into one 32-bit float */
1173 GLuint result[4], ubx, uby, ubz, ubw;
1174 fetch_vector4(&inst->SrcReg[0], machine, a);
1175 a[0] = CLAMP(a[0], -128.0F / 127.0F, 1.0F);
1176 a[1] = CLAMP(a[1], -128.0F / 127.0F, 1.0F);
1177 a[2] = CLAMP(a[2], -128.0F / 127.0F, 1.0F);
1178 a[3] = CLAMP(a[3], -128.0F / 127.0F, 1.0F);
1179 ubx = F_TO_I(127.0F * a[0] + 128.0F);
1180 uby = F_TO_I(127.0F * a[1] + 128.0F);
1181 ubz = F_TO_I(127.0F * a[2] + 128.0F);
1182 ubw = F_TO_I(127.0F * a[3] + 128.0F);
1186 result[3] = ubx | (uby << 8) | (ubz << 16) | (ubw << 24);
1187 store_vector4ui(inst, machine, result);
1190 case OPCODE_PK4UB: /* pack four GLubytes into one 32-bit float */
1193 GLuint result[4], ubx, uby, ubz, ubw;
1194 fetch_vector4(&inst->SrcReg[0], machine, a);
1195 a[0] = CLAMP(a[0], 0.0F, 1.0F);
1196 a[1] = CLAMP(a[1], 0.0F, 1.0F);
1197 a[2] = CLAMP(a[2], 0.0F, 1.0F);
1198 a[3] = CLAMP(a[3], 0.0F, 1.0F);
1199 ubx = F_TO_I(255.0F * a[0]);
1200 uby = F_TO_I(255.0F * a[1]);
1201 ubz = F_TO_I(255.0F * a[2]);
1202 ubw = F_TO_I(255.0F * a[3]);
1206 result[3] = ubx | (uby << 8) | (ubz << 16) | (ubw << 24);
1207 store_vector4ui(inst, machine, result);
1212 GLfloat a[4], b[4], result[4];
1213 fetch_vector1(&inst->SrcReg[0], machine, a);
1214 fetch_vector1(&inst->SrcReg[1], machine, b);
1215 result[0] = result[1] = result[2] = result[3]
1216 = (GLfloat) pow(a[0], b[0]);
1217 store_vector4(inst, machine, result);
1223 GLfloat a[4], result[4];
1224 fetch_vector1(&inst->SrcReg[0], machine, a);
1228 else if (IS_INF_OR_NAN(a[0]))
1229 printf("RCP(inf)\n");
1231 result[0] = result[1] = result[2] = result[3] = 1.0F / a[0];
1232 store_vector4(inst, machine, result);
1235 case OPCODE_RET: /* return from subroutine (conditional) */
1236 if (eval_condition(machine, inst)) {
1237 if (machine->StackDepth == 0) {
1238 return GL_TRUE; /* Per GL_NV_vertex_program2 spec */
1240 /* subtract one because of pc++ in the for loop */
1241 pc = machine->CallStack[--machine->StackDepth] - 1;
1244 case OPCODE_RFL: /* reflection vector */
1246 GLfloat axis[4], dir[4], result[4], tmpX, tmpW;
1247 fetch_vector4(&inst->SrcReg[0], machine, axis);
1248 fetch_vector4(&inst->SrcReg[1], machine, dir);
1249 tmpW = DOT3(axis, axis);
1250 tmpX = (2.0F * DOT3(axis, dir)) / tmpW;
1251 result[0] = tmpX * axis[0] - dir[0];
1252 result[1] = tmpX * axis[1] - dir[1];
1253 result[2] = tmpX * axis[2] - dir[2];
1254 /* result[3] is never written! XXX enforce in parser! */
1255 store_vector4(inst, machine, result);
1258 case OPCODE_RSQ: /* 1 / sqrt() */
1260 GLfloat a[4], result[4];
1261 fetch_vector1(&inst->SrcReg[0], machine, a);
1263 result[0] = result[1] = result[2] = result[3] = INV_SQRTF(a[0]);
1264 store_vector4(inst, machine, result);
1266 printf("RSQ %g = 1/sqrt(|%g|)\n", result[0], a[0]);
1270 case OPCODE_SCS: /* sine and cos */
1272 GLfloat a[4], result[4];
1273 fetch_vector1(&inst->SrcReg[0], machine, a);
1274 result[0] = (GLfloat) cos(a[0]);
1275 result[1] = (GLfloat) sin(a[0]);
1276 result[2] = 0.0; /* undefined! */
1277 result[3] = 0.0; /* undefined! */
1278 store_vector4(inst, machine, result);
1281 case OPCODE_SEQ: /* set on equal */
1283 GLfloat a[4], b[4], result[4];
1284 fetch_vector4(&inst->SrcReg[0], machine, a);
1285 fetch_vector4(&inst->SrcReg[1], machine, b);
1286 result[0] = (a[0] == b[0]) ? 1.0F : 0.0F;
1287 result[1] = (a[1] == b[1]) ? 1.0F : 0.0F;
1288 result[2] = (a[2] == b[2]) ? 1.0F : 0.0F;
1289 result[3] = (a[3] == b[3]) ? 1.0F : 0.0F;
1290 store_vector4(inst, machine, result);
1292 printf("SEQ (%g %g %g %g) = (%g %g %g %g) == (%g %g %g %g)\n",
1293 result[0], result[1], result[2], result[3],
1294 a[0], a[1], a[2], a[3],
1295 b[0], b[1], b[2], b[3]);
1299 case OPCODE_SFL: /* set false, operands ignored */
1301 static const GLfloat result[4] = { 0.0F, 0.0F, 0.0F, 0.0F };
1302 store_vector4(inst, machine, result);
1305 case OPCODE_SGE: /* set on greater or equal */
1307 GLfloat a[4], b[4], result[4];
1308 fetch_vector4(&inst->SrcReg[0], machine, a);
1309 fetch_vector4(&inst->SrcReg[1], machine, b);
1310 result[0] = (a[0] >= b[0]) ? 1.0F : 0.0F;
1311 result[1] = (a[1] >= b[1]) ? 1.0F : 0.0F;
1312 result[2] = (a[2] >= b[2]) ? 1.0F : 0.0F;
1313 result[3] = (a[3] >= b[3]) ? 1.0F : 0.0F;
1314 store_vector4(inst, machine, result);
1316 printf("SGE (%g %g %g %g) = (%g %g %g %g) >= (%g %g %g %g)\n",
1317 result[0], result[1], result[2], result[3],
1318 a[0], a[1], a[2], a[3],
1319 b[0], b[1], b[2], b[3]);
1323 case OPCODE_SGT: /* set on greater */
1325 GLfloat a[4], b[4], result[4];
1326 fetch_vector4(&inst->SrcReg[0], machine, a);
1327 fetch_vector4(&inst->SrcReg[1], machine, b);
1328 result[0] = (a[0] > b[0]) ? 1.0F : 0.0F;
1329 result[1] = (a[1] > b[1]) ? 1.0F : 0.0F;
1330 result[2] = (a[2] > b[2]) ? 1.0F : 0.0F;
1331 result[3] = (a[3] > b[3]) ? 1.0F : 0.0F;
1332 store_vector4(inst, machine, result);
1334 printf("SGT (%g %g %g %g) = (%g %g %g %g) > (%g %g %g %g)\n",
1335 result[0], result[1], result[2], result[3],
1336 a[0], a[1], a[2], a[3],
1337 b[0], b[1], b[2], b[3]);
1343 GLfloat a[4], result[4];
1344 fetch_vector1(&inst->SrcReg[0], machine, a);
1345 result[0] = result[1] = result[2] = result[3]
1346 = (GLfloat) sin(a[0]);
1347 store_vector4(inst, machine, result);
1350 case OPCODE_SLE: /* set on less or equal */
1352 GLfloat a[4], b[4], result[4];
1353 fetch_vector4(&inst->SrcReg[0], machine, a);
1354 fetch_vector4(&inst->SrcReg[1], machine, b);
1355 result[0] = (a[0] <= b[0]) ? 1.0F : 0.0F;
1356 result[1] = (a[1] <= b[1]) ? 1.0F : 0.0F;
1357 result[2] = (a[2] <= b[2]) ? 1.0F : 0.0F;
1358 result[3] = (a[3] <= b[3]) ? 1.0F : 0.0F;
1359 store_vector4(inst, machine, result);
1361 printf("SLE (%g %g %g %g) = (%g %g %g %g) <= (%g %g %g %g)\n",
1362 result[0], result[1], result[2], result[3],
1363 a[0], a[1], a[2], a[3],
1364 b[0], b[1], b[2], b[3]);
1368 case OPCODE_SLT: /* set on less */
1370 GLfloat a[4], b[4], result[4];
1371 fetch_vector4(&inst->SrcReg[0], machine, a);
1372 fetch_vector4(&inst->SrcReg[1], machine, b);
1373 result[0] = (a[0] < b[0]) ? 1.0F : 0.0F;
1374 result[1] = (a[1] < b[1]) ? 1.0F : 0.0F;
1375 result[2] = (a[2] < b[2]) ? 1.0F : 0.0F;
1376 result[3] = (a[3] < b[3]) ? 1.0F : 0.0F;
1377 store_vector4(inst, machine, result);
1379 printf("SLT (%g %g %g %g) = (%g %g %g %g) < (%g %g %g %g)\n",
1380 result[0], result[1], result[2], result[3],
1381 a[0], a[1], a[2], a[3],
1382 b[0], b[1], b[2], b[3]);
1386 case OPCODE_SNE: /* set on not equal */
1388 GLfloat a[4], b[4], result[4];
1389 fetch_vector4(&inst->SrcReg[0], machine, a);
1390 fetch_vector4(&inst->SrcReg[1], machine, b);
1391 result[0] = (a[0] != b[0]) ? 1.0F : 0.0F;
1392 result[1] = (a[1] != b[1]) ? 1.0F : 0.0F;
1393 result[2] = (a[2] != b[2]) ? 1.0F : 0.0F;
1394 result[3] = (a[3] != b[3]) ? 1.0F : 0.0F;
1395 store_vector4(inst, machine, result);
1397 printf("SNE (%g %g %g %g) = (%g %g %g %g) != (%g %g %g %g)\n",
1398 result[0], result[1], result[2], result[3],
1399 a[0], a[1], a[2], a[3],
1400 b[0], b[1], b[2], b[3]);
1404 case OPCODE_SSG: /* set sign (-1, 0 or +1) */
1406 GLfloat a[4], result[4];
1407 fetch_vector4(&inst->SrcReg[0], machine, a);
1408 result[0] = (GLfloat) ((a[0] > 0.0F) - (a[0] < 0.0F));
1409 result[1] = (GLfloat) ((a[1] > 0.0F) - (a[1] < 0.0F));
1410 result[2] = (GLfloat) ((a[2] > 0.0F) - (a[2] < 0.0F));
1411 result[3] = (GLfloat) ((a[3] > 0.0F) - (a[3] < 0.0F));
1412 store_vector4(inst, machine, result);
1415 case OPCODE_STR: /* set true, operands ignored */
1417 static const GLfloat result[4] = { 1.0F, 1.0F, 1.0F, 1.0F };
1418 store_vector4(inst, machine, result);
1423 GLfloat a[4], b[4], result[4];
1424 fetch_vector4(&inst->SrcReg[0], machine, a);
1425 fetch_vector4(&inst->SrcReg[1], machine, b);
1426 result[0] = a[0] - b[0];
1427 result[1] = a[1] - b[1];
1428 result[2] = a[2] - b[2];
1429 result[3] = a[3] - b[3];
1430 store_vector4(inst, machine, result);
1432 printf("SUB (%g %g %g %g) = (%g %g %g %g) - (%g %g %g %g)\n",
1433 result[0], result[1], result[2], result[3],
1434 a[0], a[1], a[2], a[3], b[0], b[1], b[2], b[3]);
1438 case OPCODE_SWZ: /* extended swizzle */
1440 const struct prog_src_register *source = &inst->SrcReg[0];
1441 const GLfloat *src = get_src_register_pointer(source, machine);
1444 for (i = 0; i < 4; i++) {
1445 const GLuint swz = GET_SWZ(source->Swizzle, i);
1446 if (swz == SWIZZLE_ZERO)
1448 else if (swz == SWIZZLE_ONE)
1453 result[i] = src[swz];
1455 if (source->Negate & (1 << i))
1456 result[i] = -result[i];
1458 store_vector4(inst, machine, result);
1461 case OPCODE_TEX: /* Both ARB and NV frag prog */
1462 /* Simple texel lookup */
1464 GLfloat texcoord[4], color[4];
1465 fetch_vector4(&inst->SrcReg[0], machine, texcoord);
1467 /* For TEX, texcoord.Q should not be used and its value should not
1468 * matter (at most, we pass coord.xyz to texture3D() in GLSL).
1469 * Set Q=1 so that FetchTexelDeriv() doesn't get a garbage value
1470 * which is effectively what happens when the texcoord swizzle
1475 fetch_texel(ctx, machine, inst, texcoord, 0.0, color);
1478 printf("TEX (%g, %g, %g, %g) = texture[%d][%g, %g, %g, %g]\n",
1479 color[0], color[1], color[2], color[3],
1481 texcoord[0], texcoord[1], texcoord[2], texcoord[3]);
1483 store_vector4(inst, machine, color);
1486 case OPCODE_TXB: /* GL_ARB_fragment_program only */
1487 /* Texel lookup with LOD bias */
1489 GLfloat texcoord[4], color[4], lodBias;
1491 fetch_vector4(&inst->SrcReg[0], machine, texcoord);
1493 /* texcoord[3] is the bias to add to lambda */
1494 lodBias = texcoord[3];
1496 fetch_texel(ctx, machine, inst, texcoord, lodBias, color);
1499 printf("TXB (%g, %g, %g, %g) = texture[%d][%g %g %g %g]"
1501 color[0], color[1], color[2], color[3],
1510 store_vector4(inst, machine, color);
1513 case OPCODE_TXD: /* GL_NV_fragment_program only */
1514 /* Texture lookup w/ partial derivatives for LOD */
1516 GLfloat texcoord[4], dtdx[4], dtdy[4], color[4];
1517 fetch_vector4(&inst->SrcReg[0], machine, texcoord);
1518 fetch_vector4(&inst->SrcReg[1], machine, dtdx);
1519 fetch_vector4(&inst->SrcReg[2], machine, dtdy);
1520 machine->FetchTexelDeriv(ctx, texcoord, dtdx, dtdy,
1522 inst->TexSrcUnit, color);
1523 store_vector4(inst, machine, color);
1527 /* Texel lookup with explicit LOD */
1529 GLfloat texcoord[4], color[4], lod;
1531 fetch_vector4(&inst->SrcReg[0], machine, texcoord);
1533 /* texcoord[3] is the LOD */
1536 machine->FetchTexelLod(ctx, texcoord, lod,
1537 machine->Samplers[inst->TexSrcUnit], color);
1539 store_vector4(inst, machine, color);
1542 case OPCODE_TXP: /* GL_ARB_fragment_program only */
1543 /* Texture lookup w/ projective divide */
1545 GLfloat texcoord[4], color[4];
1547 fetch_vector4(&inst->SrcReg[0], machine, texcoord);
1548 /* Not so sure about this test - if texcoord[3] is
1549 * zero, we'd probably be fine except for an ASSERT in
1550 * IROUND_POS() which gets triggered by the inf values created.
1552 if (texcoord[3] != 0.0) {
1553 texcoord[0] /= texcoord[3];
1554 texcoord[1] /= texcoord[3];
1555 texcoord[2] /= texcoord[3];
1558 fetch_texel(ctx, machine, inst, texcoord, 0.0, color);
1560 store_vector4(inst, machine, color);
1563 case OPCODE_TXP_NV: /* GL_NV_fragment_program only */
1564 /* Texture lookup w/ projective divide, as above, but do not
1565 * do the divide by w if sampling from a cube map.
1568 GLfloat texcoord[4], color[4];
1570 fetch_vector4(&inst->SrcReg[0], machine, texcoord);
1571 if (inst->TexSrcTarget != TEXTURE_CUBE_INDEX &&
1572 texcoord[3] != 0.0) {
1573 texcoord[0] /= texcoord[3];
1574 texcoord[1] /= texcoord[3];
1575 texcoord[2] /= texcoord[3];
1578 fetch_texel(ctx, machine, inst, texcoord, 0.0, color);
1580 store_vector4(inst, machine, color);
1583 case OPCODE_TRUNC: /* truncate toward zero */
1585 GLfloat a[4], result[4];
1586 fetch_vector4(&inst->SrcReg[0], machine, a);
1587 result[0] = (GLfloat) (GLint) a[0];
1588 result[1] = (GLfloat) (GLint) a[1];
1589 result[2] = (GLfloat) (GLint) a[2];
1590 result[3] = (GLfloat) (GLint) a[3];
1591 store_vector4(inst, machine, result);
1594 case OPCODE_UP2H: /* unpack two 16-bit floats */
1596 const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine);
1601 result[0] = result[2] = _mesa_half_to_float(hx);
1602 result[1] = result[3] = _mesa_half_to_float(hy);
1603 store_vector4(inst, machine, result);
1606 case OPCODE_UP2US: /* unpack two GLushorts */
1608 const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine);
1613 result[0] = result[2] = usx * (1.0f / 65535.0f);
1614 result[1] = result[3] = usy * (1.0f / 65535.0f);
1615 store_vector4(inst, machine, result);
1618 case OPCODE_UP4B: /* unpack four GLbytes */
1620 const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine);
1622 result[0] = (((raw >> 0) & 0xff) - 128) / 127.0F;
1623 result[1] = (((raw >> 8) & 0xff) - 128) / 127.0F;
1624 result[2] = (((raw >> 16) & 0xff) - 128) / 127.0F;
1625 result[3] = (((raw >> 24) & 0xff) - 128) / 127.0F;
1626 store_vector4(inst, machine, result);
1629 case OPCODE_UP4UB: /* unpack four GLubytes */
1631 const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine);
1633 result[0] = ((raw >> 0) & 0xff) / 255.0F;
1634 result[1] = ((raw >> 8) & 0xff) / 255.0F;
1635 result[2] = ((raw >> 16) & 0xff) / 255.0F;
1636 result[3] = ((raw >> 24) & 0xff) / 255.0F;
1637 store_vector4(inst, machine, result);
1640 case OPCODE_XPD: /* cross product */
1642 GLfloat a[4], b[4], result[4];
1643 fetch_vector4(&inst->SrcReg[0], machine, a);
1644 fetch_vector4(&inst->SrcReg[1], machine, b);
1645 result[0] = a[1] * b[2] - a[2] * b[1];
1646 result[1] = a[2] * b[0] - a[0] * b[2];
1647 result[2] = a[0] * b[1] - a[1] * b[0];
1649 store_vector4(inst, machine, result);
1651 printf("XPD (%g %g %g %g) = (%g %g %g) X (%g %g %g)\n",
1652 result[0], result[1], result[2], result[3],
1653 a[0], a[1], a[2], b[0], b[1], b[2]);
1657 case OPCODE_X2D: /* 2-D matrix transform */
1659 GLfloat a[4], b[4], c[4], result[4];
1660 fetch_vector4(&inst->SrcReg[0], machine, a);
1661 fetch_vector4(&inst->SrcReg[1], machine, b);
1662 fetch_vector4(&inst->SrcReg[2], machine, c);
1663 result[0] = a[0] + b[0] * c[0] + b[1] * c[1];
1664 result[1] = a[1] + b[0] * c[2] + b[1] * c[3];
1665 result[2] = a[2] + b[0] * c[0] + b[1] * c[1];
1666 result[3] = a[3] + b[0] * c[2] + b[1] * c[3];
1667 store_vector4(inst, machine, result);
1673 _mesa_problem(ctx, "Bad opcode %d in _mesa_execute_program",
1675 return GL_TRUE; /* return value doesn't matter */
1679 if (numExec > maxExec) {
1680 static GLboolean reported = GL_FALSE;
1682 _mesa_problem(ctx, "Infinite loop detected in fragment program");