2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 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/context.h"
42 #include "prog_execute.h"
43 #include "prog_instruction.h"
44 #include "prog_parameter.h"
45 #include "prog_print.h"
46 #include "shader/slang/slang_library_noise.h"
54 * Set x to positive or negative infinity.
56 #if defined(USE_IEEE) || defined(_WIN32)
57 #define SET_POS_INFINITY(x) ( *((GLuint *) (void *)&x) = 0x7F800000 )
58 #define SET_NEG_INFINITY(x) ( *((GLuint *) (void *)&x) = 0xFF800000 )
60 #define SET_POS_INFINITY(x) x = __MAXFLOAT
61 #define SET_NEG_INFINITY(x) x = -__MAXFLOAT
63 #define SET_POS_INFINITY(x) x = (GLfloat) HUGE_VAL
64 #define SET_NEG_INFINITY(x) x = (GLfloat) -HUGE_VAL
67 #define SET_FLOAT_BITS(x, bits) ((fi_type *) (void *) &(x))->i = bits
70 static const GLfloat ZeroVec
[4] = { 0.0F
, 0.0F
, 0.0F
, 0.0F
};
75 * Return a pointer to the 4-element float vector specified by the given
78 static INLINE
const GLfloat
*
79 get_register_pointer(const struct prog_src_register
*source
,
80 const struct gl_program_machine
*machine
)
82 if (source
->RelAddr
) {
83 const GLint reg
= source
->Index
+ machine
->AddressReg
[0][0];
84 if (source
->File
== PROGRAM_ENV_PARAM
)
85 if (reg
< 0 || reg
>= MAX_PROGRAM_ENV_PARAMS
)
88 return machine
->EnvParams
[reg
];
90 const struct gl_program_parameter_list
*params
;
91 ASSERT(source
->File
== PROGRAM_LOCAL_PARAM
||
92 source
->File
== PROGRAM_CONSTANT
||
93 source
->File
== PROGRAM_STATE_VAR
||
94 source
->File
== PROGRAM_UNIFORM
);
95 params
= machine
->CurProgram
->Parameters
;
96 if (reg
< 0 || reg
>= (GLint
)params
->NumParameters
)
99 return params
->ParameterValues
[reg
];
103 switch (source
->File
) {
104 case PROGRAM_TEMPORARY
:
105 ASSERT(source
->Index
< MAX_PROGRAM_TEMPS
);
106 return machine
->Temporaries
[source
->Index
];
109 if (machine
->CurProgram
->Target
== GL_VERTEX_PROGRAM_ARB
) {
110 ASSERT(source
->Index
< VERT_ATTRIB_MAX
);
111 return machine
->VertAttribs
[source
->Index
];
114 ASSERT(source
->Index
< FRAG_ATTRIB_MAX
);
115 return machine
->Attribs
[source
->Index
][machine
->CurElement
];
119 ASSERT(source
->Index
< MAX_PROGRAM_OUTPUTS
);
120 return machine
->Outputs
[source
->Index
];
122 case PROGRAM_LOCAL_PARAM
:
123 ASSERT(source
->Index
< MAX_PROGRAM_LOCAL_PARAMS
);
124 return machine
->CurProgram
->LocalParams
[source
->Index
];
126 case PROGRAM_ENV_PARAM
:
127 ASSERT(source
->Index
< MAX_PROGRAM_ENV_PARAMS
);
128 return machine
->EnvParams
[source
->Index
];
130 case PROGRAM_STATE_VAR
:
132 case PROGRAM_CONSTANT
:
134 case PROGRAM_UNIFORM
:
136 case PROGRAM_NAMED_PARAM
:
137 ASSERT(source
->Index
<
138 (GLint
) machine
->CurProgram
->Parameters
->NumParameters
);
139 return machine
->CurProgram
->Parameters
->ParameterValues
[source
->Index
];
143 "Invalid input register file %d in get_register_pointer()",
150 #if FEATURE_MESA_program_debug
151 static struct gl_program_machine
*CurrentMachine
= NULL
;
154 * For GL_MESA_program_debug.
155 * Return current value (4*GLfloat) of a program register.
156 * Called via ctx->Driver.GetProgramRegister().
159 _mesa_get_program_register(GLcontext
*ctx
, enum register_file file
,
160 GLuint index
, GLfloat val
[4])
162 if (CurrentMachine
) {
163 struct prog_src_register src
;
167 reg
= get_register_pointer(&src
, CurrentMachine
);
171 #endif /* FEATURE_MESA_program_debug */
175 * Fetch a 4-element float vector from the given source register.
176 * Apply swizzling and negating as needed.
179 fetch_vector4(const struct prog_src_register
*source
,
180 const struct gl_program_machine
*machine
, GLfloat result
[4])
182 const GLfloat
*src
= get_register_pointer(source
, machine
);
185 if (source
->Swizzle
== SWIZZLE_NOOP
) {
187 COPY_4V(result
, src
);
190 ASSERT(GET_SWZ(source
->Swizzle
, 0) <= 3);
191 ASSERT(GET_SWZ(source
->Swizzle
, 1) <= 3);
192 ASSERT(GET_SWZ(source
->Swizzle
, 2) <= 3);
193 ASSERT(GET_SWZ(source
->Swizzle
, 3) <= 3);
194 result
[0] = src
[GET_SWZ(source
->Swizzle
, 0)];
195 result
[1] = src
[GET_SWZ(source
->Swizzle
, 1)];
196 result
[2] = src
[GET_SWZ(source
->Swizzle
, 2)];
197 result
[3] = src
[GET_SWZ(source
->Swizzle
, 3)];
200 if (source
->NegateBase
) {
201 result
[0] = -result
[0];
202 result
[1] = -result
[1];
203 result
[2] = -result
[2];
204 result
[3] = -result
[3];
207 result
[0] = FABSF(result
[0]);
208 result
[1] = FABSF(result
[1]);
209 result
[2] = FABSF(result
[2]);
210 result
[3] = FABSF(result
[3]);
212 if (source
->NegateAbs
) {
213 result
[0] = -result
[0];
214 result
[1] = -result
[1];
215 result
[2] = -result
[2];
216 result
[3] = -result
[3];
222 * Fetch the derivative with respect to X or Y for the given register.
223 * XXX this currently only works for fragment program input attribs.
226 fetch_vector4_deriv(GLcontext
* ctx
,
227 const struct prog_src_register
*source
,
228 const struct gl_program_machine
*machine
,
229 char xOrY
, GLfloat result
[4])
231 if (source
->File
== PROGRAM_INPUT
&& source
->Index
< (GLint
)machine
->NumDeriv
) {
232 const GLint col
= machine
->CurElement
;
233 const GLfloat w
= machine
->Attribs
[FRAG_ATTRIB_WPOS
][col
][3];
234 const GLfloat invQ
= 1.0f
/ w
;
238 deriv
[0] = machine
->DerivX
[source
->Index
][0] * invQ
;
239 deriv
[1] = machine
->DerivX
[source
->Index
][1] * invQ
;
240 deriv
[2] = machine
->DerivX
[source
->Index
][2] * invQ
;
241 deriv
[3] = machine
->DerivX
[source
->Index
][3] * invQ
;
244 deriv
[0] = machine
->DerivY
[source
->Index
][0] * invQ
;
245 deriv
[1] = machine
->DerivY
[source
->Index
][1] * invQ
;
246 deriv
[2] = machine
->DerivY
[source
->Index
][2] * invQ
;
247 deriv
[3] = machine
->DerivY
[source
->Index
][3] * invQ
;
250 result
[0] = deriv
[GET_SWZ(source
->Swizzle
, 0)];
251 result
[1] = deriv
[GET_SWZ(source
->Swizzle
, 1)];
252 result
[2] = deriv
[GET_SWZ(source
->Swizzle
, 2)];
253 result
[3] = deriv
[GET_SWZ(source
->Swizzle
, 3)];
255 if (source
->NegateBase
) {
256 result
[0] = -result
[0];
257 result
[1] = -result
[1];
258 result
[2] = -result
[2];
259 result
[3] = -result
[3];
262 result
[0] = FABSF(result
[0]);
263 result
[1] = FABSF(result
[1]);
264 result
[2] = FABSF(result
[2]);
265 result
[3] = FABSF(result
[3]);
267 if (source
->NegateAbs
) {
268 result
[0] = -result
[0];
269 result
[1] = -result
[1];
270 result
[2] = -result
[2];
271 result
[3] = -result
[3];
275 ASSIGN_4V(result
, 0.0, 0.0, 0.0, 0.0);
281 * As above, but only return result[0] element.
284 fetch_vector1(const struct prog_src_register
*source
,
285 const struct gl_program_machine
*machine
, GLfloat result
[4])
287 const GLfloat
*src
= get_register_pointer(source
, machine
);
290 result
[0] = src
[GET_SWZ(source
->Swizzle
, 0)];
292 if (source
->NegateBase
) {
293 result
[0] = -result
[0];
296 result
[0] = FABSF(result
[0]);
298 if (source
->NegateAbs
) {
299 result
[0] = -result
[0];
305 * Fetch texel from texture. Use partial derivatives when possible.
308 fetch_texel(GLcontext
*ctx
,
309 const struct gl_program_machine
*machine
,
310 const struct prog_instruction
*inst
,
311 const GLfloat texcoord
[4], GLfloat lodBias
,
314 const GLuint unit
= machine
->Samplers
[inst
->TexSrcUnit
];
316 /* Note: we only have the right derivatives for fragment input attribs.
318 if (machine
->NumDeriv
> 0 &&
319 inst
->SrcReg
[0].File
== PROGRAM_INPUT
&&
320 inst
->SrcReg
[0].Index
== FRAG_ATTRIB_TEX0
+ inst
->TexSrcUnit
) {
321 /* simple texture fetch for which we should have derivatives */
322 GLuint attr
= inst
->SrcReg
[0].Index
;
323 machine
->FetchTexelDeriv(ctx
, texcoord
,
324 machine
->DerivX
[attr
],
325 machine
->DerivY
[attr
],
326 lodBias
, unit
, color
);
329 machine
->FetchTexelLod(ctx
, texcoord
, lodBias
, unit
, color
);
335 * Test value against zero and return GT, LT, EQ or UN if NaN.
338 generate_cc(float value
)
341 return COND_UN
; /* NaN */
351 * Test if the ccMaskRule is satisfied by the given condition code.
352 * Used to mask destination writes according to the current condition code.
354 static INLINE GLboolean
355 test_cc(GLuint condCode
, GLuint ccMaskRule
)
357 switch (ccMaskRule
) {
358 case COND_EQ
: return (condCode
== COND_EQ
);
359 case COND_NE
: return (condCode
!= COND_EQ
);
360 case COND_LT
: return (condCode
== COND_LT
);
361 case COND_GE
: return (condCode
== COND_GT
|| condCode
== COND_EQ
);
362 case COND_LE
: return (condCode
== COND_LT
|| condCode
== COND_EQ
);
363 case COND_GT
: return (condCode
== COND_GT
);
364 case COND_TR
: return GL_TRUE
;
365 case COND_FL
: return GL_FALSE
;
366 default: return GL_TRUE
;
372 * Evaluate the 4 condition codes against a predicate and return GL_TRUE
373 * or GL_FALSE to indicate result.
375 static INLINE GLboolean
376 eval_condition(const struct gl_program_machine
*machine
,
377 const struct prog_instruction
*inst
)
379 const GLuint swizzle
= inst
->DstReg
.CondSwizzle
;
380 const GLuint condMask
= inst
->DstReg
.CondMask
;
381 if (test_cc(machine
->CondCodes
[GET_SWZ(swizzle
, 0)], condMask
) ||
382 test_cc(machine
->CondCodes
[GET_SWZ(swizzle
, 1)], condMask
) ||
383 test_cc(machine
->CondCodes
[GET_SWZ(swizzle
, 2)], condMask
) ||
384 test_cc(machine
->CondCodes
[GET_SWZ(swizzle
, 3)], condMask
)) {
395 * Store 4 floats into a register. Observe the instructions saturate and
396 * set-condition-code flags.
399 store_vector4(const struct prog_instruction
*inst
,
400 struct gl_program_machine
*machine
, const GLfloat value
[4])
402 const struct prog_dst_register
*dest
= &(inst
->DstReg
);
403 const GLboolean clamp
= inst
->SaturateMode
== SATURATE_ZERO_ONE
;
406 GLfloat clampedValue
[4];
407 GLuint writeMask
= dest
->WriteMask
;
409 switch (dest
->File
) {
411 ASSERT(dest
->Index
< MAX_PROGRAM_OUTPUTS
);
412 dstReg
= machine
->Outputs
[dest
->Index
];
414 case PROGRAM_TEMPORARY
:
415 ASSERT(dest
->Index
< MAX_PROGRAM_TEMPS
);
416 dstReg
= machine
->Temporaries
[dest
->Index
];
418 case PROGRAM_WRITE_ONLY
:
422 _mesa_problem(NULL
, "bad register file in store_vector4(fp)");
427 if (value
[0] > 1.0e10
||
428 IS_INF_OR_NAN(value
[0]) ||
429 IS_INF_OR_NAN(value
[1]) ||
430 IS_INF_OR_NAN(value
[2]) || IS_INF_OR_NAN(value
[3]))
431 printf("store %g %g %g %g\n", value
[0], value
[1], value
[2], value
[3]);
435 clampedValue
[0] = CLAMP(value
[0], 0.0F
, 1.0F
);
436 clampedValue
[1] = CLAMP(value
[1], 0.0F
, 1.0F
);
437 clampedValue
[2] = CLAMP(value
[2], 0.0F
, 1.0F
);
438 clampedValue
[3] = CLAMP(value
[3], 0.0F
, 1.0F
);
439 value
= clampedValue
;
442 if (dest
->CondMask
!= COND_TR
) {
443 /* condition codes may turn off some writes */
444 if (writeMask
& WRITEMASK_X
) {
445 if (!test_cc(machine
->CondCodes
[GET_SWZ(dest
->CondSwizzle
, 0)],
447 writeMask
&= ~WRITEMASK_X
;
449 if (writeMask
& WRITEMASK_Y
) {
450 if (!test_cc(machine
->CondCodes
[GET_SWZ(dest
->CondSwizzle
, 1)],
452 writeMask
&= ~WRITEMASK_Y
;
454 if (writeMask
& WRITEMASK_Z
) {
455 if (!test_cc(machine
->CondCodes
[GET_SWZ(dest
->CondSwizzle
, 2)],
457 writeMask
&= ~WRITEMASK_Z
;
459 if (writeMask
& WRITEMASK_W
) {
460 if (!test_cc(machine
->CondCodes
[GET_SWZ(dest
->CondSwizzle
, 3)],
462 writeMask
&= ~WRITEMASK_W
;
466 if (writeMask
& WRITEMASK_X
)
467 dstReg
[0] = value
[0];
468 if (writeMask
& WRITEMASK_Y
)
469 dstReg
[1] = value
[1];
470 if (writeMask
& WRITEMASK_Z
)
471 dstReg
[2] = value
[2];
472 if (writeMask
& WRITEMASK_W
)
473 dstReg
[3] = value
[3];
475 if (inst
->CondUpdate
) {
476 if (writeMask
& WRITEMASK_X
)
477 machine
->CondCodes
[0] = generate_cc(value
[0]);
478 if (writeMask
& WRITEMASK_Y
)
479 machine
->CondCodes
[1] = generate_cc(value
[1]);
480 if (writeMask
& WRITEMASK_Z
)
481 machine
->CondCodes
[2] = generate_cc(value
[2]);
482 if (writeMask
& WRITEMASK_W
)
483 machine
->CondCodes
[3] = generate_cc(value
[3]);
485 printf("CondCodes=(%s,%s,%s,%s) for:\n",
486 _mesa_condcode_string(machine
->CondCodes
[0]),
487 _mesa_condcode_string(machine
->CondCodes
[1]),
488 _mesa_condcode_string(machine
->CondCodes
[2]),
489 _mesa_condcode_string(machine
->CondCodes
[3]));
496 * Execute the given vertex/fragment program.
498 * \param ctx rendering context
499 * \param program the program to execute
500 * \param machine machine state (must be initialized)
501 * \return GL_TRUE if program completed or GL_FALSE if program executed KIL.
504 _mesa_execute_program(GLcontext
* ctx
,
505 const struct gl_program
*program
,
506 struct gl_program_machine
*machine
)
508 const GLuint numInst
= program
->NumInstructions
;
509 const GLuint maxExec
= 10000;
510 GLuint pc
, numExec
= 0;
512 machine
->CurProgram
= program
;
515 printf("execute program %u --------------------\n", program
->Id
);
518 #if FEATURE_MESA_program_debug
519 CurrentMachine
= machine
;
522 if (program
->Target
== GL_VERTEX_PROGRAM_ARB
) {
523 machine
->EnvParams
= ctx
->VertexProgram
.Parameters
;
526 machine
->EnvParams
= ctx
->FragmentProgram
.Parameters
;
529 for (pc
= 0; pc
< numInst
; pc
++) {
530 const struct prog_instruction
*inst
= program
->Instructions
+ pc
;
532 #if FEATURE_MESA_program_debug
533 if (ctx
->FragmentProgram
.CallbackEnabled
&&
534 ctx
->FragmentProgram
.Callback
) {
535 ctx
->FragmentProgram
.CurrentPosition
= inst
->StringPos
;
536 ctx
->FragmentProgram
.Callback(program
->Target
,
537 ctx
->FragmentProgram
.CallbackData
);
542 _mesa_print_instruction(inst
);
545 switch (inst
->Opcode
) {
548 GLfloat a
[4], result
[4];
549 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
550 result
[0] = FABSF(a
[0]);
551 result
[1] = FABSF(a
[1]);
552 result
[2] = FABSF(a
[2]);
553 result
[3] = FABSF(a
[3]);
554 store_vector4(inst
, machine
, result
);
559 GLfloat a
[4], b
[4], result
[4];
560 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
561 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
562 result
[0] = a
[0] + b
[0];
563 result
[1] = a
[1] + b
[1];
564 result
[2] = a
[2] + b
[2];
565 result
[3] = a
[3] + b
[3];
566 store_vector4(inst
, machine
, result
);
568 printf("ADD (%g %g %g %g) = (%g %g %g %g) + (%g %g %g %g)\n",
569 result
[0], result
[1], result
[2], result
[3],
570 a
[0], a
[1], a
[2], a
[3], b
[0], b
[1], b
[2], b
[3]);
577 fetch_vector4(&inst
->SrcReg
[0], machine
, t
);
578 machine
->AddressReg
[0][0] = (GLint
) FLOORF(t
[0]);
585 /* subtract 1 here since pc is incremented by for(pc) loop */
586 pc
= inst
->BranchTarget
- 1; /* go to matching BNGLOOP */
588 case OPCODE_BGNSUB
: /* begin subroutine */
590 case OPCODE_ENDSUB
: /* end subroutine */
592 case OPCODE_BRA
: /* branch (conditional) */
594 case OPCODE_BRK
: /* break out of loop (conditional) */
596 case OPCODE_CONT
: /* continue loop (conditional) */
597 if (eval_condition(machine
, inst
)) {
599 /* Subtract 1 here since we'll do pc++ at end of for-loop */
600 pc
= inst
->BranchTarget
- 1;
603 case OPCODE_CAL
: /* Call subroutine (conditional) */
604 if (eval_condition(machine
, inst
)) {
605 /* call the subroutine */
606 if (machine
->StackDepth
>= MAX_PROGRAM_CALL_DEPTH
) {
607 return GL_TRUE
; /* Per GL_NV_vertex_program2 spec */
609 machine
->CallStack
[machine
->StackDepth
++] = pc
+ 1; /* next inst */
610 /* Subtract 1 here since we'll do pc++ at end of for-loop */
611 pc
= inst
->BranchTarget
- 1;
616 GLfloat a
[4], b
[4], c
[4], result
[4];
617 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
618 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
619 fetch_vector4(&inst
->SrcReg
[2], machine
, c
);
620 result
[0] = a
[0] < 0.0F
? b
[0] : c
[0];
621 result
[1] = a
[1] < 0.0F
? b
[1] : c
[1];
622 result
[2] = a
[2] < 0.0F
? b
[2] : c
[2];
623 result
[3] = a
[3] < 0.0F
? b
[3] : c
[3];
624 store_vector4(inst
, machine
, result
);
629 GLfloat a
[4], result
[4];
630 fetch_vector1(&inst
->SrcReg
[0], machine
, a
);
631 result
[0] = result
[1] = result
[2] = result
[3]
632 = (GLfloat
) _mesa_cos(a
[0]);
633 store_vector4(inst
, machine
, result
);
636 case OPCODE_DDX
: /* Partial derivative with respect to X */
639 fetch_vector4_deriv(ctx
, &inst
->SrcReg
[0], machine
,
641 store_vector4(inst
, machine
, result
);
644 case OPCODE_DDY
: /* Partial derivative with respect to Y */
647 fetch_vector4_deriv(ctx
, &inst
->SrcReg
[0], machine
,
649 store_vector4(inst
, machine
, result
);
654 GLfloat a
[4], b
[4], result
[4];
655 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
656 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
657 result
[0] = result
[1] = result
[2] = result
[3] = DOT3(a
, b
);
658 store_vector4(inst
, machine
, result
);
660 printf("DP3 %g = (%g %g %g) . (%g %g %g)\n",
661 result
[0], a
[0], a
[1], a
[2], b
[0], b
[1], b
[2]);
667 GLfloat a
[4], b
[4], result
[4];
668 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
669 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
670 result
[0] = result
[1] = result
[2] = result
[3] = DOT4(a
, b
);
671 store_vector4(inst
, machine
, result
);
673 printf("DP4 %g = (%g, %g %g %g) . (%g, %g %g %g)\n",
674 result
[0], a
[0], a
[1], a
[2], a
[3],
675 b
[0], b
[1], b
[2], b
[3]);
681 GLfloat a
[4], b
[4], result
[4];
682 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
683 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
684 result
[0] = result
[1] = result
[2] = result
[3] =
685 a
[0] * b
[0] + a
[1] * b
[1] + a
[2] * b
[2] + b
[3];
686 store_vector4(inst
, machine
, result
);
689 case OPCODE_DST
: /* Distance vector */
691 GLfloat a
[4], b
[4], result
[4];
692 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
693 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
695 result
[1] = a
[1] * b
[1];
698 store_vector4(inst
, machine
, result
);
703 GLfloat t
[4], q
[4], floor_t0
;
704 fetch_vector1(&inst
->SrcReg
[0], machine
, t
);
705 floor_t0
= FLOORF(t
[0]);
706 if (floor_t0
> FLT_MAX_EXP
) {
707 SET_POS_INFINITY(q
[0]);
708 SET_POS_INFINITY(q
[2]);
710 else if (floor_t0
< FLT_MIN_EXP
) {
715 q
[0] = LDEXPF(1.0, (int) floor_t0
);
716 /* Note: GL_NV_vertex_program expects
717 * result.z = result.x * APPX(result.y)
718 * We do what the ARB extension says.
720 q
[2] = (GLfloat
) pow(2.0, t
[0]);
722 q
[1] = t
[0] - floor_t0
;
724 store_vector4( inst
, machine
, q
);
727 case OPCODE_EX2
: /* Exponential base 2 */
729 GLfloat a
[4], result
[4];
730 fetch_vector1(&inst
->SrcReg
[0], machine
, a
);
731 result
[0] = result
[1] = result
[2] = result
[3] =
732 (GLfloat
) _mesa_pow(2.0, a
[0]);
733 store_vector4(inst
, machine
, result
);
738 GLfloat a
[4], result
[4];
739 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
740 result
[0] = FLOORF(a
[0]);
741 result
[1] = FLOORF(a
[1]);
742 result
[2] = FLOORF(a
[2]);
743 result
[3] = FLOORF(a
[3]);
744 store_vector4(inst
, machine
, result
);
749 GLfloat a
[4], result
[4];
750 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
751 result
[0] = a
[0] - FLOORF(a
[0]);
752 result
[1] = a
[1] - FLOORF(a
[1]);
753 result
[2] = a
[2] - FLOORF(a
[2]);
754 result
[3] = a
[3] - FLOORF(a
[3]);
755 store_vector4(inst
, machine
, result
);
762 if (inst
->SrcReg
[0].File
!= PROGRAM_UNDEFINED
) {
764 fetch_vector1(&inst
->SrcReg
[0], machine
, a
);
765 cond
= (a
[0] != 0.0);
768 cond
= eval_condition(machine
, inst
);
771 printf("IF: %d\n", cond
);
775 /* do if-clause (just continue execution) */
778 /* go to the instruction after ELSE or ENDIF */
779 assert(inst
->BranchTarget
>= 0);
780 pc
= inst
->BranchTarget
- 1;
786 assert(inst
->BranchTarget
>= 0);
787 pc
= inst
->BranchTarget
- 1;
792 case OPCODE_INT
: /* float to int */
794 GLfloat a
[4], result
[4];
795 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
796 result
[0] = (GLfloat
) (GLint
) a
[0];
797 result
[1] = (GLfloat
) (GLint
) a
[1];
798 result
[2] = (GLfloat
) (GLint
) a
[2];
799 result
[3] = (GLfloat
) (GLint
) a
[3];
800 store_vector4(inst
, machine
, result
);
803 case OPCODE_KIL_NV
: /* NV_f_p only (conditional) */
804 if (eval_condition(machine
, inst
)) {
808 case OPCODE_KIL
: /* ARB_f_p only */
811 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
812 if (a
[0] < 0.0F
|| a
[1] < 0.0F
|| a
[2] < 0.0F
|| a
[3] < 0.0F
) {
817 case OPCODE_LG2
: /* log base 2 */
819 GLfloat a
[4], result
[4];
820 fetch_vector1(&inst
->SrcReg
[0], machine
, a
);
821 result
[0] = result
[1] = result
[2] = result
[3] = LOG2(a
[0]);
822 store_vector4(inst
, machine
, result
);
827 const GLfloat epsilon
= 1.0F
/ 256.0F
; /* from NV VP spec */
828 GLfloat a
[4], result
[4];
829 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
830 a
[0] = MAX2(a
[0], 0.0F
);
831 a
[1] = MAX2(a
[1], 0.0F
);
832 /* XXX ARB version clamps a[3], NV version doesn't */
833 a
[3] = CLAMP(a
[3], -(128.0F
- epsilon
), (128.0F
- epsilon
));
836 /* XXX we could probably just use pow() here */
838 if (a
[1] == 0.0 && a
[3] == 0.0)
841 result
[2] = EXPF(a
[3] * LOGF(a
[1]));
847 store_vector4(inst
, machine
, result
);
849 printf("LIT (%g %g %g %g) : (%g %g %g %g)\n",
850 result
[0], result
[1], result
[2], result
[3],
851 a
[0], a
[1], a
[2], a
[3]);
857 GLfloat t
[4], q
[4], abs_t0
;
858 fetch_vector1(&inst
->SrcReg
[0], machine
, t
);
859 abs_t0
= FABSF(t
[0]);
860 if (abs_t0
!= 0.0F
) {
861 /* Since we really can't handle infinite values on VMS
862 * like other OSes we'll use __MAXFLOAT to represent
863 * infinity. This may need some tweaking.
866 if (abs_t0
== __MAXFLOAT
)
868 if (IS_INF_OR_NAN(abs_t0
))
871 SET_POS_INFINITY(q
[0]);
873 SET_POS_INFINITY(q
[2]);
877 GLfloat mantissa
= FREXPF(t
[0], &exponent
);
878 q
[0] = (GLfloat
) (exponent
- 1);
879 q
[1] = (GLfloat
) (2.0 * mantissa
); /* map [.5, 1) -> [1, 2) */
880 q
[2] = (GLfloat
) (q
[0] + LOG2(q
[1]));
884 SET_NEG_INFINITY(q
[0]);
886 SET_NEG_INFINITY(q
[2]);
889 store_vector4(inst
, machine
, q
);
894 GLfloat a
[4], b
[4], c
[4], result
[4];
895 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
896 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
897 fetch_vector4(&inst
->SrcReg
[2], machine
, c
);
898 result
[0] = a
[0] * b
[0] + (1.0F
- a
[0]) * c
[0];
899 result
[1] = a
[1] * b
[1] + (1.0F
- a
[1]) * c
[1];
900 result
[2] = a
[2] * b
[2] + (1.0F
- a
[2]) * c
[2];
901 result
[3] = a
[3] * b
[3] + (1.0F
- a
[3]) * c
[3];
902 store_vector4(inst
, machine
, result
);
904 printf("LRP (%g %g %g %g) = (%g %g %g %g), "
905 "(%g %g %g %g), (%g %g %g %g)\n",
906 result
[0], result
[1], result
[2], result
[3],
907 a
[0], a
[1], a
[2], a
[3],
908 b
[0], b
[1], b
[2], b
[3], c
[0], c
[1], c
[2], c
[3]);
914 GLfloat a
[4], b
[4], c
[4], result
[4];
915 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
916 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
917 fetch_vector4(&inst
->SrcReg
[2], machine
, c
);
918 result
[0] = a
[0] * b
[0] + c
[0];
919 result
[1] = a
[1] * b
[1] + c
[1];
920 result
[2] = a
[2] * b
[2] + c
[2];
921 result
[3] = a
[3] * b
[3] + c
[3];
922 store_vector4(inst
, machine
, result
);
924 printf("MAD (%g %g %g %g) = (%g %g %g %g) * "
925 "(%g %g %g %g) + (%g %g %g %g)\n",
926 result
[0], result
[1], result
[2], result
[3],
927 a
[0], a
[1], a
[2], a
[3],
928 b
[0], b
[1], b
[2], b
[3], c
[0], c
[1], c
[2], c
[3]);
934 GLfloat a
[4], b
[4], result
[4];
935 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
936 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
937 result
[0] = MAX2(a
[0], b
[0]);
938 result
[1] = MAX2(a
[1], b
[1]);
939 result
[2] = MAX2(a
[2], b
[2]);
940 result
[3] = MAX2(a
[3], b
[3]);
941 store_vector4(inst
, machine
, result
);
943 printf("MAX (%g %g %g %g) = (%g %g %g %g), (%g %g %g %g)\n",
944 result
[0], result
[1], result
[2], result
[3],
945 a
[0], a
[1], a
[2], a
[3], b
[0], b
[1], b
[2], b
[3]);
951 GLfloat a
[4], b
[4], result
[4];
952 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
953 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
954 result
[0] = MIN2(a
[0], b
[0]);
955 result
[1] = MIN2(a
[1], b
[1]);
956 result
[2] = MIN2(a
[2], b
[2]);
957 result
[3] = MIN2(a
[3], b
[3]);
958 store_vector4(inst
, machine
, result
);
964 fetch_vector4(&inst
->SrcReg
[0], machine
, result
);
965 store_vector4(inst
, machine
, result
);
967 printf("MOV (%g %g %g %g)\n",
968 result
[0], result
[1], result
[2], result
[3]);
974 GLfloat a
[4], b
[4], result
[4];
975 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
976 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
977 result
[0] = a
[0] * b
[0];
978 result
[1] = a
[1] * b
[1];
979 result
[2] = a
[2] * b
[2];
980 result
[3] = a
[3] * b
[3];
981 store_vector4(inst
, machine
, result
);
983 printf("MUL (%g %g %g %g) = (%g %g %g %g) * (%g %g %g %g)\n",
984 result
[0], result
[1], result
[2], result
[3],
985 a
[0], a
[1], a
[2], a
[3], b
[0], b
[1], b
[2], b
[3]);
991 GLfloat a
[4], result
[4];
992 fetch_vector1(&inst
->SrcReg
[0], machine
, a
);
995 result
[2] = result
[3] = _slang_library_noise1(a
[0]);
996 store_vector4(inst
, machine
, result
);
1001 GLfloat a
[4], result
[4];
1002 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1005 result
[2] = result
[3] = _slang_library_noise2(a
[0], a
[1]);
1006 store_vector4(inst
, machine
, result
);
1011 GLfloat a
[4], result
[4];
1012 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1016 result
[3] = _slang_library_noise3(a
[0], a
[1], a
[2]);
1017 store_vector4(inst
, machine
, result
);
1022 GLfloat a
[4], result
[4];
1023 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1027 result
[3] = _slang_library_noise4(a
[0], a
[1], a
[2], a
[3]);
1028 store_vector4(inst
, machine
, result
);
1033 case OPCODE_PK2H
: /* pack two 16-bit floats in one 32-bit float */
1035 GLfloat a
[4], result
[4];
1037 GLuint
*rawResult
= (GLuint
*) result
;
1039 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1040 hx
= _mesa_float_to_half(a
[0]);
1041 hy
= _mesa_float_to_half(a
[1]);
1042 twoHalves
= hx
| (hy
<< 16);
1043 rawResult
[0] = rawResult
[1] = rawResult
[2] = rawResult
[3]
1045 store_vector4(inst
, machine
, result
);
1048 case OPCODE_PK2US
: /* pack two GLushorts into one 32-bit float */
1050 GLfloat a
[4], result
[4];
1051 GLuint usx
, usy
, *rawResult
= (GLuint
*) result
;
1052 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1053 a
[0] = CLAMP(a
[0], 0.0F
, 1.0F
);
1054 a
[1] = CLAMP(a
[1], 0.0F
, 1.0F
);
1055 usx
= IROUND(a
[0] * 65535.0F
);
1056 usy
= IROUND(a
[1] * 65535.0F
);
1057 rawResult
[0] = rawResult
[1] = rawResult
[2] = rawResult
[3]
1058 = usx
| (usy
<< 16);
1059 store_vector4(inst
, machine
, result
);
1062 case OPCODE_PK4B
: /* pack four GLbytes into one 32-bit float */
1064 GLfloat a
[4], result
[4];
1065 GLuint ubx
, uby
, ubz
, ubw
, *rawResult
= (GLuint
*) result
;
1066 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1067 a
[0] = CLAMP(a
[0], -128.0F
/ 127.0F
, 1.0F
);
1068 a
[1] = CLAMP(a
[1], -128.0F
/ 127.0F
, 1.0F
);
1069 a
[2] = CLAMP(a
[2], -128.0F
/ 127.0F
, 1.0F
);
1070 a
[3] = CLAMP(a
[3], -128.0F
/ 127.0F
, 1.0F
);
1071 ubx
= IROUND(127.0F
* a
[0] + 128.0F
);
1072 uby
= IROUND(127.0F
* a
[1] + 128.0F
);
1073 ubz
= IROUND(127.0F
* a
[2] + 128.0F
);
1074 ubw
= IROUND(127.0F
* a
[3] + 128.0F
);
1075 rawResult
[0] = rawResult
[1] = rawResult
[2] = rawResult
[3]
1076 = ubx
| (uby
<< 8) | (ubz
<< 16) | (ubw
<< 24);
1077 store_vector4(inst
, machine
, result
);
1080 case OPCODE_PK4UB
: /* pack four GLubytes into one 32-bit float */
1082 GLfloat a
[4], result
[4];
1083 GLuint ubx
, uby
, ubz
, ubw
, *rawResult
= (GLuint
*) result
;
1084 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1085 a
[0] = CLAMP(a
[0], 0.0F
, 1.0F
);
1086 a
[1] = CLAMP(a
[1], 0.0F
, 1.0F
);
1087 a
[2] = CLAMP(a
[2], 0.0F
, 1.0F
);
1088 a
[3] = CLAMP(a
[3], 0.0F
, 1.0F
);
1089 ubx
= IROUND(255.0F
* a
[0]);
1090 uby
= IROUND(255.0F
* a
[1]);
1091 ubz
= IROUND(255.0F
* a
[2]);
1092 ubw
= IROUND(255.0F
* a
[3]);
1093 rawResult
[0] = rawResult
[1] = rawResult
[2] = rawResult
[3]
1094 = ubx
| (uby
<< 8) | (ubz
<< 16) | (ubw
<< 24);
1095 store_vector4(inst
, machine
, result
);
1100 GLfloat a
[4], b
[4], result
[4];
1101 fetch_vector1(&inst
->SrcReg
[0], machine
, a
);
1102 fetch_vector1(&inst
->SrcReg
[1], machine
, b
);
1103 result
[0] = result
[1] = result
[2] = result
[3]
1104 = (GLfloat
) _mesa_pow(a
[0], b
[0]);
1105 store_vector4(inst
, machine
, result
);
1110 GLfloat a
[4], result
[4];
1111 fetch_vector1(&inst
->SrcReg
[0], machine
, a
);
1115 else if (IS_INF_OR_NAN(a
[0]))
1116 printf("RCP(inf)\n");
1118 result
[0] = result
[1] = result
[2] = result
[3] = 1.0F
/ a
[0];
1119 store_vector4(inst
, machine
, result
);
1122 case OPCODE_RET
: /* return from subroutine (conditional) */
1123 if (eval_condition(machine
, inst
)) {
1124 if (machine
->StackDepth
== 0) {
1125 return GL_TRUE
; /* Per GL_NV_vertex_program2 spec */
1127 /* subtract one because of pc++ in the for loop */
1128 pc
= machine
->CallStack
[--machine
->StackDepth
] - 1;
1131 case OPCODE_RFL
: /* reflection vector */
1133 GLfloat axis
[4], dir
[4], result
[4], tmpX
, tmpW
;
1134 fetch_vector4(&inst
->SrcReg
[0], machine
, axis
);
1135 fetch_vector4(&inst
->SrcReg
[1], machine
, dir
);
1136 tmpW
= DOT3(axis
, axis
);
1137 tmpX
= (2.0F
* DOT3(axis
, dir
)) / tmpW
;
1138 result
[0] = tmpX
* axis
[0] - dir
[0];
1139 result
[1] = tmpX
* axis
[1] - dir
[1];
1140 result
[2] = tmpX
* axis
[2] - dir
[2];
1141 /* result[3] is never written! XXX enforce in parser! */
1142 store_vector4(inst
, machine
, result
);
1145 case OPCODE_RSQ
: /* 1 / sqrt() */
1147 GLfloat a
[4], result
[4];
1148 fetch_vector1(&inst
->SrcReg
[0], machine
, a
);
1150 result
[0] = result
[1] = result
[2] = result
[3] = INV_SQRTF(a
[0]);
1151 store_vector4(inst
, machine
, result
);
1153 printf("RSQ %g = 1/sqrt(|%g|)\n", result
[0], a
[0]);
1157 case OPCODE_SCS
: /* sine and cos */
1159 GLfloat a
[4], result
[4];
1160 fetch_vector1(&inst
->SrcReg
[0], machine
, a
);
1161 result
[0] = (GLfloat
) _mesa_cos(a
[0]);
1162 result
[1] = (GLfloat
) _mesa_sin(a
[0]);
1163 result
[2] = 0.0; /* undefined! */
1164 result
[3] = 0.0; /* undefined! */
1165 store_vector4(inst
, machine
, result
);
1168 case OPCODE_SEQ
: /* set on equal */
1170 GLfloat a
[4], b
[4], result
[4];
1171 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1172 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
1173 result
[0] = (a
[0] == b
[0]) ? 1.0F
: 0.0F
;
1174 result
[1] = (a
[1] == b
[1]) ? 1.0F
: 0.0F
;
1175 result
[2] = (a
[2] == b
[2]) ? 1.0F
: 0.0F
;
1176 result
[3] = (a
[3] == b
[3]) ? 1.0F
: 0.0F
;
1177 store_vector4(inst
, machine
, result
);
1179 printf("SEQ (%g %g %g %g) = (%g %g %g %g) == (%g %g %g %g)\n",
1180 result
[0], result
[1], result
[2], result
[3],
1181 a
[0], a
[1], a
[2], a
[3],
1182 b
[0], b
[1], b
[2], b
[3]);
1186 case OPCODE_SFL
: /* set false, operands ignored */
1188 static const GLfloat result
[4] = { 0.0F
, 0.0F
, 0.0F
, 0.0F
};
1189 store_vector4(inst
, machine
, result
);
1192 case OPCODE_SGE
: /* set on greater or equal */
1194 GLfloat a
[4], b
[4], result
[4];
1195 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1196 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
1197 result
[0] = (a
[0] >= b
[0]) ? 1.0F
: 0.0F
;
1198 result
[1] = (a
[1] >= b
[1]) ? 1.0F
: 0.0F
;
1199 result
[2] = (a
[2] >= b
[2]) ? 1.0F
: 0.0F
;
1200 result
[3] = (a
[3] >= b
[3]) ? 1.0F
: 0.0F
;
1201 store_vector4(inst
, machine
, result
);
1203 printf("SGE (%g %g %g %g) = (%g %g %g %g) >= (%g %g %g %g)\n",
1204 result
[0], result
[1], result
[2], result
[3],
1205 a
[0], a
[1], a
[2], a
[3],
1206 b
[0], b
[1], b
[2], b
[3]);
1210 case OPCODE_SGT
: /* set on greater */
1212 GLfloat a
[4], b
[4], result
[4];
1213 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1214 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
1215 result
[0] = (a
[0] > b
[0]) ? 1.0F
: 0.0F
;
1216 result
[1] = (a
[1] > b
[1]) ? 1.0F
: 0.0F
;
1217 result
[2] = (a
[2] > b
[2]) ? 1.0F
: 0.0F
;
1218 result
[3] = (a
[3] > b
[3]) ? 1.0F
: 0.0F
;
1219 store_vector4(inst
, machine
, result
);
1221 printf("SGT (%g %g %g %g) = (%g %g %g %g) > (%g %g %g %g)\n",
1222 result
[0], result
[1], result
[2], result
[3],
1223 a
[0], a
[1], a
[2], a
[3],
1224 b
[0], b
[1], b
[2], b
[3]);
1230 GLfloat a
[4], result
[4];
1231 fetch_vector1(&inst
->SrcReg
[0], machine
, a
);
1232 result
[0] = result
[1] = result
[2] = result
[3]
1233 = (GLfloat
) _mesa_sin(a
[0]);
1234 store_vector4(inst
, machine
, result
);
1237 case OPCODE_SLE
: /* set on less or equal */
1239 GLfloat a
[4], b
[4], result
[4];
1240 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1241 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
1242 result
[0] = (a
[0] <= b
[0]) ? 1.0F
: 0.0F
;
1243 result
[1] = (a
[1] <= b
[1]) ? 1.0F
: 0.0F
;
1244 result
[2] = (a
[2] <= b
[2]) ? 1.0F
: 0.0F
;
1245 result
[3] = (a
[3] <= b
[3]) ? 1.0F
: 0.0F
;
1246 store_vector4(inst
, machine
, result
);
1248 printf("SLE (%g %g %g %g) = (%g %g %g %g) <= (%g %g %g %g)\n",
1249 result
[0], result
[1], result
[2], result
[3],
1250 a
[0], a
[1], a
[2], a
[3],
1251 b
[0], b
[1], b
[2], b
[3]);
1255 case OPCODE_SLT
: /* set on less */
1257 GLfloat a
[4], b
[4], result
[4];
1258 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1259 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
1260 result
[0] = (a
[0] < b
[0]) ? 1.0F
: 0.0F
;
1261 result
[1] = (a
[1] < b
[1]) ? 1.0F
: 0.0F
;
1262 result
[2] = (a
[2] < b
[2]) ? 1.0F
: 0.0F
;
1263 result
[3] = (a
[3] < b
[3]) ? 1.0F
: 0.0F
;
1264 store_vector4(inst
, machine
, result
);
1266 printf("SLT (%g %g %g %g) = (%g %g %g %g) < (%g %g %g %g)\n",
1267 result
[0], result
[1], result
[2], result
[3],
1268 a
[0], a
[1], a
[2], a
[3],
1269 b
[0], b
[1], b
[2], b
[3]);
1273 case OPCODE_SNE
: /* set on not equal */
1275 GLfloat a
[4], b
[4], result
[4];
1276 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1277 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
1278 result
[0] = (a
[0] != b
[0]) ? 1.0F
: 0.0F
;
1279 result
[1] = (a
[1] != b
[1]) ? 1.0F
: 0.0F
;
1280 result
[2] = (a
[2] != b
[2]) ? 1.0F
: 0.0F
;
1281 result
[3] = (a
[3] != b
[3]) ? 1.0F
: 0.0F
;
1282 store_vector4(inst
, machine
, result
);
1284 printf("SNE (%g %g %g %g) = (%g %g %g %g) != (%g %g %g %g)\n",
1285 result
[0], result
[1], result
[2], result
[3],
1286 a
[0], a
[1], a
[2], a
[3],
1287 b
[0], b
[1], b
[2], b
[3]);
1291 case OPCODE_STR
: /* set true, operands ignored */
1293 static const GLfloat result
[4] = { 1.0F
, 1.0F
, 1.0F
, 1.0F
};
1294 store_vector4(inst
, machine
, result
);
1299 GLfloat a
[4], b
[4], result
[4];
1300 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1301 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
1302 result
[0] = a
[0] - b
[0];
1303 result
[1] = a
[1] - b
[1];
1304 result
[2] = a
[2] - b
[2];
1305 result
[3] = a
[3] - b
[3];
1306 store_vector4(inst
, machine
, result
);
1308 printf("SUB (%g %g %g %g) = (%g %g %g %g) - (%g %g %g %g)\n",
1309 result
[0], result
[1], result
[2], result
[3],
1310 a
[0], a
[1], a
[2], a
[3], b
[0], b
[1], b
[2], b
[3]);
1314 case OPCODE_SWZ
: /* extended swizzle */
1316 const struct prog_src_register
*source
= &inst
->SrcReg
[0];
1317 const GLfloat
*src
= get_register_pointer(source
, machine
);
1320 for (i
= 0; i
< 4; i
++) {
1321 const GLuint swz
= GET_SWZ(source
->Swizzle
, i
);
1322 if (swz
== SWIZZLE_ZERO
)
1324 else if (swz
== SWIZZLE_ONE
)
1329 result
[i
] = src
[swz
];
1331 if (source
->NegateBase
& (1 << i
))
1332 result
[i
] = -result
[i
];
1334 store_vector4(inst
, machine
, result
);
1337 case OPCODE_TEX
: /* Both ARB and NV frag prog */
1338 /* Simple texel lookup */
1340 GLfloat texcoord
[4], color
[4];
1341 fetch_vector4(&inst
->SrcReg
[0], machine
, texcoord
);
1343 fetch_texel(ctx
, machine
, inst
, texcoord
, 0.0, color
);
1346 printf("TEX (%g, %g, %g, %g) = texture[%d][%g, %g, %g, %g]\n",
1347 color
[0], color
[1], color
[2], color
[3],
1349 texcoord
[0], texcoord
[1], texcoord
[2], texcoord
[3]);
1351 store_vector4(inst
, machine
, color
);
1354 case OPCODE_TXB
: /* GL_ARB_fragment_program only */
1355 /* Texel lookup with LOD bias */
1357 const struct gl_texture_unit
*texUnit
1358 = &ctx
->Texture
.Unit
[inst
->TexSrcUnit
];
1359 GLfloat texcoord
[4], color
[4], lodBias
;
1361 fetch_vector4(&inst
->SrcReg
[0], machine
, texcoord
);
1363 /* texcoord[3] is the bias to add to lambda */
1364 lodBias
= texUnit
->LodBias
+ texcoord
[3];
1365 if (texUnit
->_Current
) {
1366 lodBias
+= texUnit
->_Current
->LodBias
;
1369 fetch_texel(ctx
, machine
, inst
, texcoord
, lodBias
, color
);
1371 store_vector4(inst
, machine
, color
);
1374 case OPCODE_TXD
: /* GL_NV_fragment_program only */
1375 /* Texture lookup w/ partial derivatives for LOD */
1377 GLfloat texcoord
[4], dtdx
[4], dtdy
[4], color
[4];
1378 fetch_vector4(&inst
->SrcReg
[0], machine
, texcoord
);
1379 fetch_vector4(&inst
->SrcReg
[1], machine
, dtdx
);
1380 fetch_vector4(&inst
->SrcReg
[2], machine
, dtdy
);
1381 machine
->FetchTexelDeriv(ctx
, texcoord
, dtdx
, dtdy
,
1383 inst
->TexSrcUnit
, color
);
1384 store_vector4(inst
, machine
, color
);
1387 case OPCODE_TXP
: /* GL_ARB_fragment_program only */
1388 /* Texture lookup w/ projective divide */
1390 GLfloat texcoord
[4], color
[4];
1392 fetch_vector4(&inst
->SrcReg
[0], machine
, texcoord
);
1393 /* Not so sure about this test - if texcoord[3] is
1394 * zero, we'd probably be fine except for an ASSERT in
1395 * IROUND_POS() which gets triggered by the inf values created.
1397 if (texcoord
[3] != 0.0) {
1398 texcoord
[0] /= texcoord
[3];
1399 texcoord
[1] /= texcoord
[3];
1400 texcoord
[2] /= texcoord
[3];
1403 fetch_texel(ctx
, machine
, inst
, texcoord
, 0.0, color
);
1405 store_vector4(inst
, machine
, color
);
1408 case OPCODE_TXP_NV
: /* GL_NV_fragment_program only */
1409 /* Texture lookup w/ projective divide, as above, but do not
1410 * do the divide by w if sampling from a cube map.
1413 GLfloat texcoord
[4], color
[4];
1415 fetch_vector4(&inst
->SrcReg
[0], machine
, texcoord
);
1416 if (inst
->TexSrcTarget
!= TEXTURE_CUBE_INDEX
&&
1417 texcoord
[3] != 0.0) {
1418 texcoord
[0] /= texcoord
[3];
1419 texcoord
[1] /= texcoord
[3];
1420 texcoord
[2] /= texcoord
[3];
1423 fetch_texel(ctx
, machine
, inst
, texcoord
, 0.0, color
);
1425 store_vector4(inst
, machine
, color
);
1428 case OPCODE_UP2H
: /* unpack two 16-bit floats */
1430 GLfloat a
[4], result
[4];
1431 const GLuint
*rawBits
= (const GLuint
*) a
;
1433 fetch_vector1(&inst
->SrcReg
[0], machine
, a
);
1434 hx
= rawBits
[0] & 0xffff;
1435 hy
= rawBits
[0] >> 16;
1436 result
[0] = result
[2] = _mesa_half_to_float(hx
);
1437 result
[1] = result
[3] = _mesa_half_to_float(hy
);
1438 store_vector4(inst
, machine
, result
);
1441 case OPCODE_UP2US
: /* unpack two GLushorts */
1443 GLfloat a
[4], result
[4];
1444 const GLuint
*rawBits
= (const GLuint
*) a
;
1446 fetch_vector1(&inst
->SrcReg
[0], machine
, a
);
1447 usx
= rawBits
[0] & 0xffff;
1448 usy
= rawBits
[0] >> 16;
1449 result
[0] = result
[2] = usx
* (1.0f
/ 65535.0f
);
1450 result
[1] = result
[3] = usy
* (1.0f
/ 65535.0f
);
1451 store_vector4(inst
, machine
, result
);
1454 case OPCODE_UP4B
: /* unpack four GLbytes */
1456 GLfloat a
[4], result
[4];
1457 const GLuint
*rawBits
= (const GLuint
*) a
;
1458 fetch_vector1(&inst
->SrcReg
[0], machine
, a
);
1459 result
[0] = (((rawBits
[0] >> 0) & 0xff) - 128) / 127.0F
;
1460 result
[1] = (((rawBits
[0] >> 8) & 0xff) - 128) / 127.0F
;
1461 result
[2] = (((rawBits
[0] >> 16) & 0xff) - 128) / 127.0F
;
1462 result
[3] = (((rawBits
[0] >> 24) & 0xff) - 128) / 127.0F
;
1463 store_vector4(inst
, machine
, result
);
1466 case OPCODE_UP4UB
: /* unpack four GLubytes */
1468 GLfloat a
[4], result
[4];
1469 const GLuint
*rawBits
= (const GLuint
*) a
;
1470 fetch_vector1(&inst
->SrcReg
[0], machine
, a
);
1471 result
[0] = ((rawBits
[0] >> 0) & 0xff) / 255.0F
;
1472 result
[1] = ((rawBits
[0] >> 8) & 0xff) / 255.0F
;
1473 result
[2] = ((rawBits
[0] >> 16) & 0xff) / 255.0F
;
1474 result
[3] = ((rawBits
[0] >> 24) & 0xff) / 255.0F
;
1475 store_vector4(inst
, machine
, result
);
1478 case OPCODE_XPD
: /* cross product */
1480 GLfloat a
[4], b
[4], result
[4];
1481 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1482 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
1483 result
[0] = a
[1] * b
[2] - a
[2] * b
[1];
1484 result
[1] = a
[2] * b
[0] - a
[0] * b
[2];
1485 result
[2] = a
[0] * b
[1] - a
[1] * b
[0];
1487 store_vector4(inst
, machine
, result
);
1489 printf("XPD (%g %g %g %g) = (%g %g %g) X (%g %g %g)\n",
1490 result
[0], result
[1], result
[2], result
[3],
1491 a
[0], a
[1], a
[2], b
[0], b
[1], b
[2]);
1495 case OPCODE_X2D
: /* 2-D matrix transform */
1497 GLfloat a
[4], b
[4], c
[4], result
[4];
1498 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1499 fetch_vector4(&inst
->SrcReg
[1], machine
, b
);
1500 fetch_vector4(&inst
->SrcReg
[2], machine
, c
);
1501 result
[0] = a
[0] + b
[0] * c
[0] + b
[1] * c
[1];
1502 result
[1] = a
[1] + b
[0] * c
[2] + b
[1] * c
[3];
1503 result
[2] = a
[2] + b
[0] * c
[0] + b
[1] * c
[1];
1504 result
[3] = a
[3] + b
[0] * c
[2] + b
[1] * c
[3];
1505 store_vector4(inst
, machine
, result
);
1510 if (inst
->SrcReg
[0].File
!= -1) {
1512 fetch_vector4(&inst
->SrcReg
[0], machine
, a
);
1513 _mesa_printf("%s%g, %g, %g, %g\n", (const char *) inst
->Data
,
1514 a
[0], a
[1], a
[2], a
[3]);
1517 _mesa_printf("%s\n", (const char *) inst
->Data
);
1524 _mesa_problem(ctx
, "Bad opcode %d in _mesa_execute_program",
1526 return GL_TRUE
; /* return value doesn't matter */
1530 if (numExec
> maxExec
) {
1531 _mesa_problem(ctx
, "Infinite loop detected in fragment program");
1537 #if FEATURE_MESA_program_debug
1538 CurrentMachine
= NULL
;