0,0 → 1,1443 |
/* |
* Mesa 3-D graphics library |
* |
* Copyright (C) 1999-2008 Brian Paul All Rights Reserved. |
* |
* Permission is hereby granted, free of charge, to any person obtaining a |
* copy of this software and associated documentation files (the "Software"), |
* to deal in the Software without restriction, including without limitation |
* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
* and/or sell copies of the Software, and to permit persons to whom the |
* Software is furnished to do so, subject to the following conditions: |
* |
* The above copyright notice and this permission notice shall be included |
* in all copies or substantial portions of the Software. |
* |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
* OTHER DEALINGS IN THE SOFTWARE. |
*/ |
|
/** |
* \file prog_execute.c |
* Software interpreter for vertex/fragment programs. |
* \author Brian Paul |
*/ |
|
/* |
* NOTE: we do everything in single-precision floating point; we don't |
* currently observe the single/half/fixed-precision qualifiers. |
* |
*/ |
|
|
#include "c99_math.h" |
#include "main/glheader.h" |
#include "main/macros.h" |
#include "prog_execute.h" |
#include "prog_instruction.h" |
#include "prog_parameter.h" |
#include "prog_print.h" |
#include "prog_noise.h" |
|
|
/* debug predicate */ |
#define DEBUG_PROG 0 |
|
|
/** |
* Set x to positive or negative infinity. |
*/ |
#define SET_POS_INFINITY(x) \ |
do { \ |
fi_type fi; \ |
fi.i = 0x7F800000; \ |
x = fi.f; \ |
} while (0) |
#define SET_NEG_INFINITY(x) \ |
do { \ |
fi_type fi; \ |
fi.i = 0xFF800000; \ |
x = fi.f; \ |
} while (0) |
|
#define SET_FLOAT_BITS(x, bits) ((fi_type *) (void *) &(x))->i = bits |
|
|
static const GLfloat ZeroVec[4] = { 0.0F, 0.0F, 0.0F, 0.0F }; |
|
|
/** |
* Return a pointer to the 4-element float vector specified by the given |
* source register. |
*/ |
static inline const GLfloat * |
get_src_register_pointer(const struct prog_src_register *source, |
const struct gl_program_machine *machine) |
{ |
const struct gl_program *prog = machine->CurProgram; |
GLint reg = source->Index; |
|
if (source->RelAddr) { |
/* add address register value to src index/offset */ |
reg += machine->AddressReg[0][0]; |
if (reg < 0) { |
return ZeroVec; |
} |
} |
|
switch (source->File) { |
case PROGRAM_TEMPORARY: |
if (reg >= MAX_PROGRAM_TEMPS) |
return ZeroVec; |
return machine->Temporaries[reg]; |
|
case PROGRAM_INPUT: |
if (prog->Target == GL_VERTEX_PROGRAM_ARB) { |
if (reg >= VERT_ATTRIB_MAX) |
return ZeroVec; |
return machine->VertAttribs[reg]; |
} |
else { |
if (reg >= VARYING_SLOT_MAX) |
return ZeroVec; |
return machine->Attribs[reg][machine->CurElement]; |
} |
|
case PROGRAM_OUTPUT: |
if (reg >= MAX_PROGRAM_OUTPUTS) |
return ZeroVec; |
return machine->Outputs[reg]; |
|
case PROGRAM_STATE_VAR: |
/* Fallthrough */ |
case PROGRAM_CONSTANT: |
/* Fallthrough */ |
case PROGRAM_UNIFORM: |
if (reg >= (GLint) prog->Parameters->NumParameters) |
return ZeroVec; |
return (GLfloat *) prog->Parameters->ParameterValues[reg]; |
|
case PROGRAM_SYSTEM_VALUE: |
assert(reg < (GLint) ARRAY_SIZE(machine->SystemValues)); |
return machine->SystemValues[reg]; |
|
default: |
_mesa_problem(NULL, |
"Invalid src register file %d in get_src_register_pointer()", |
source->File); |
return ZeroVec; |
} |
} |
|
|
/** |
* Return a pointer to the 4-element float vector specified by the given |
* destination register. |
*/ |
static inline GLfloat * |
get_dst_register_pointer(const struct prog_dst_register *dest, |
struct gl_program_machine *machine) |
{ |
static GLfloat dummyReg[4]; |
GLint reg = dest->Index; |
|
if (dest->RelAddr) { |
/* add address register value to src index/offset */ |
reg += machine->AddressReg[0][0]; |
if (reg < 0) { |
return dummyReg; |
} |
} |
|
switch (dest->File) { |
case PROGRAM_TEMPORARY: |
if (reg >= MAX_PROGRAM_TEMPS) |
return dummyReg; |
return machine->Temporaries[reg]; |
|
case PROGRAM_OUTPUT: |
if (reg >= MAX_PROGRAM_OUTPUTS) |
return dummyReg; |
return machine->Outputs[reg]; |
|
default: |
_mesa_problem(NULL, |
"Invalid dest register file %d in get_dst_register_pointer()", |
dest->File); |
return dummyReg; |
} |
} |
|
|
|
/** |
* Fetch a 4-element float vector from the given source register. |
* Apply swizzling and negating as needed. |
*/ |
static void |
fetch_vector4(const struct prog_src_register *source, |
const struct gl_program_machine *machine, GLfloat result[4]) |
{ |
const GLfloat *src = get_src_register_pointer(source, machine); |
|
if (source->Swizzle == SWIZZLE_NOOP) { |
/* no swizzling */ |
COPY_4V(result, src); |
} |
else { |
assert(GET_SWZ(source->Swizzle, 0) <= 3); |
assert(GET_SWZ(source->Swizzle, 1) <= 3); |
assert(GET_SWZ(source->Swizzle, 2) <= 3); |
assert(GET_SWZ(source->Swizzle, 3) <= 3); |
result[0] = src[GET_SWZ(source->Swizzle, 0)]; |
result[1] = src[GET_SWZ(source->Swizzle, 1)]; |
result[2] = src[GET_SWZ(source->Swizzle, 2)]; |
result[3] = src[GET_SWZ(source->Swizzle, 3)]; |
} |
|
if (source->Abs) { |
result[0] = fabsf(result[0]); |
result[1] = fabsf(result[1]); |
result[2] = fabsf(result[2]); |
result[3] = fabsf(result[3]); |
} |
if (source->Negate) { |
assert(source->Negate == NEGATE_XYZW); |
result[0] = -result[0]; |
result[1] = -result[1]; |
result[2] = -result[2]; |
result[3] = -result[3]; |
} |
|
#ifdef NAN_CHECK |
assert(!IS_INF_OR_NAN(result[0])); |
assert(!IS_INF_OR_NAN(result[0])); |
assert(!IS_INF_OR_NAN(result[0])); |
assert(!IS_INF_OR_NAN(result[0])); |
#endif |
} |
|
|
/** |
* Fetch the derivative with respect to X or Y for the given register. |
* XXX this currently only works for fragment program input attribs. |
*/ |
static void |
fetch_vector4_deriv(struct gl_context * ctx, |
const struct prog_src_register *source, |
const struct gl_program_machine *machine, |
char xOrY, GLfloat result[4]) |
{ |
if (source->File == PROGRAM_INPUT && |
source->Index < (GLint) machine->NumDeriv) { |
const GLint col = machine->CurElement; |
const GLfloat w = machine->Attribs[VARYING_SLOT_POS][col][3]; |
const GLfloat invQ = 1.0f / w; |
GLfloat deriv[4]; |
|
if (xOrY == 'X') { |
deriv[0] = machine->DerivX[source->Index][0] * invQ; |
deriv[1] = machine->DerivX[source->Index][1] * invQ; |
deriv[2] = machine->DerivX[source->Index][2] * invQ; |
deriv[3] = machine->DerivX[source->Index][3] * invQ; |
} |
else { |
deriv[0] = machine->DerivY[source->Index][0] * invQ; |
deriv[1] = machine->DerivY[source->Index][1] * invQ; |
deriv[2] = machine->DerivY[source->Index][2] * invQ; |
deriv[3] = machine->DerivY[source->Index][3] * invQ; |
} |
|
result[0] = deriv[GET_SWZ(source->Swizzle, 0)]; |
result[1] = deriv[GET_SWZ(source->Swizzle, 1)]; |
result[2] = deriv[GET_SWZ(source->Swizzle, 2)]; |
result[3] = deriv[GET_SWZ(source->Swizzle, 3)]; |
|
if (source->Abs) { |
result[0] = fabsf(result[0]); |
result[1] = fabsf(result[1]); |
result[2] = fabsf(result[2]); |
result[3] = fabsf(result[3]); |
} |
if (source->Negate) { |
assert(source->Negate == NEGATE_XYZW); |
result[0] = -result[0]; |
result[1] = -result[1]; |
result[2] = -result[2]; |
result[3] = -result[3]; |
} |
} |
else { |
ASSIGN_4V(result, 0.0, 0.0, 0.0, 0.0); |
} |
} |
|
|
/** |
* As above, but only return result[0] element. |
*/ |
static void |
fetch_vector1(const struct prog_src_register *source, |
const struct gl_program_machine *machine, GLfloat result[4]) |
{ |
const GLfloat *src = get_src_register_pointer(source, machine); |
|
result[0] = src[GET_SWZ(source->Swizzle, 0)]; |
|
if (source->Abs) { |
result[0] = fabsf(result[0]); |
} |
if (source->Negate) { |
result[0] = -result[0]; |
} |
} |
|
|
/** |
* Fetch texel from texture. Use partial derivatives when possible. |
*/ |
static inline void |
fetch_texel(struct gl_context *ctx, |
const struct gl_program_machine *machine, |
const struct prog_instruction *inst, |
const GLfloat texcoord[4], GLfloat lodBias, |
GLfloat color[4]) |
{ |
const GLuint unit = machine->Samplers[inst->TexSrcUnit]; |
|
/* Note: we only have the right derivatives for fragment input attribs. |
*/ |
if (machine->NumDeriv > 0 && |
inst->SrcReg[0].File == PROGRAM_INPUT && |
inst->SrcReg[0].Index == VARYING_SLOT_TEX0 + inst->TexSrcUnit) { |
/* simple texture fetch for which we should have derivatives */ |
GLuint attr = inst->SrcReg[0].Index; |
machine->FetchTexelDeriv(ctx, texcoord, |
machine->DerivX[attr], |
machine->DerivY[attr], |
lodBias, unit, color); |
} |
else { |
machine->FetchTexelLod(ctx, texcoord, lodBias, unit, color); |
} |
} |
|
|
/** |
* Test value against zero and return GT, LT, EQ or UN if NaN. |
*/ |
static inline GLuint |
generate_cc(float value) |
{ |
if (value != value) |
return COND_UN; /* NaN */ |
if (value > 0.0F) |
return COND_GT; |
if (value < 0.0F) |
return COND_LT; |
return COND_EQ; |
} |
|
|
/** |
* Test if the ccMaskRule is satisfied by the given condition code. |
* Used to mask destination writes according to the current condition code. |
*/ |
static inline GLboolean |
test_cc(GLuint condCode, GLuint ccMaskRule) |
{ |
switch (ccMaskRule) { |
case COND_EQ: return (condCode == COND_EQ); |
case COND_NE: return (condCode != COND_EQ); |
case COND_LT: return (condCode == COND_LT); |
case COND_GE: return (condCode == COND_GT || condCode == COND_EQ); |
case COND_LE: return (condCode == COND_LT || condCode == COND_EQ); |
case COND_GT: return (condCode == COND_GT); |
case COND_TR: return GL_TRUE; |
case COND_FL: return GL_FALSE; |
default: return GL_TRUE; |
} |
} |
|
|
/** |
* Evaluate the 4 condition codes against a predicate and return GL_TRUE |
* or GL_FALSE to indicate result. |
*/ |
static inline GLboolean |
eval_condition(const struct gl_program_machine *machine, |
const struct prog_instruction *inst) |
{ |
const GLuint swizzle = inst->DstReg.CondSwizzle; |
const GLuint condMask = inst->DstReg.CondMask; |
if (test_cc(machine->CondCodes[GET_SWZ(swizzle, 0)], condMask) || |
test_cc(machine->CondCodes[GET_SWZ(swizzle, 1)], condMask) || |
test_cc(machine->CondCodes[GET_SWZ(swizzle, 2)], condMask) || |
test_cc(machine->CondCodes[GET_SWZ(swizzle, 3)], condMask)) { |
return GL_TRUE; |
} |
else { |
return GL_FALSE; |
} |
} |
|
|
|
/** |
* Store 4 floats into a register. Observe the instructions saturate and |
* set-condition-code flags. |
*/ |
static void |
store_vector4(const struct prog_instruction *inst, |
struct gl_program_machine *machine, const GLfloat value[4]) |
{ |
const struct prog_dst_register *dstReg = &(inst->DstReg); |
const GLboolean clamp = inst->SaturateMode == SATURATE_ZERO_ONE; |
GLuint writeMask = dstReg->WriteMask; |
GLfloat clampedValue[4]; |
GLfloat *dst = get_dst_register_pointer(dstReg, machine); |
|
#if 0 |
if (value[0] > 1.0e10 || |
IS_INF_OR_NAN(value[0]) || |
IS_INF_OR_NAN(value[1]) || |
IS_INF_OR_NAN(value[2]) || IS_INF_OR_NAN(value[3])) |
printf("store %g %g %g %g\n", value[0], value[1], value[2], value[3]); |
#endif |
|
if (clamp) { |
clampedValue[0] = CLAMP(value[0], 0.0F, 1.0F); |
clampedValue[1] = CLAMP(value[1], 0.0F, 1.0F); |
clampedValue[2] = CLAMP(value[2], 0.0F, 1.0F); |
clampedValue[3] = CLAMP(value[3], 0.0F, 1.0F); |
value = clampedValue; |
} |
|
if (dstReg->CondMask != COND_TR) { |
/* condition codes may turn off some writes */ |
if (writeMask & WRITEMASK_X) { |
if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 0)], |
dstReg->CondMask)) |
writeMask &= ~WRITEMASK_X; |
} |
if (writeMask & WRITEMASK_Y) { |
if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 1)], |
dstReg->CondMask)) |
writeMask &= ~WRITEMASK_Y; |
} |
if (writeMask & WRITEMASK_Z) { |
if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 2)], |
dstReg->CondMask)) |
writeMask &= ~WRITEMASK_Z; |
} |
if (writeMask & WRITEMASK_W) { |
if (!test_cc(machine->CondCodes[GET_SWZ(dstReg->CondSwizzle, 3)], |
dstReg->CondMask)) |
writeMask &= ~WRITEMASK_W; |
} |
} |
|
#ifdef NAN_CHECK |
assert(!IS_INF_OR_NAN(value[0])); |
assert(!IS_INF_OR_NAN(value[0])); |
assert(!IS_INF_OR_NAN(value[0])); |
assert(!IS_INF_OR_NAN(value[0])); |
#endif |
|
if (writeMask & WRITEMASK_X) |
dst[0] = value[0]; |
if (writeMask & WRITEMASK_Y) |
dst[1] = value[1]; |
if (writeMask & WRITEMASK_Z) |
dst[2] = value[2]; |
if (writeMask & WRITEMASK_W) |
dst[3] = value[3]; |
|
if (inst->CondUpdate) { |
if (writeMask & WRITEMASK_X) |
machine->CondCodes[0] = generate_cc(value[0]); |
if (writeMask & WRITEMASK_Y) |
machine->CondCodes[1] = generate_cc(value[1]); |
if (writeMask & WRITEMASK_Z) |
machine->CondCodes[2] = generate_cc(value[2]); |
if (writeMask & WRITEMASK_W) |
machine->CondCodes[3] = generate_cc(value[3]); |
#if DEBUG_PROG |
printf("CondCodes=(%s,%s,%s,%s) for:\n", |
_mesa_condcode_string(machine->CondCodes[0]), |
_mesa_condcode_string(machine->CondCodes[1]), |
_mesa_condcode_string(machine->CondCodes[2]), |
_mesa_condcode_string(machine->CondCodes[3])); |
#endif |
} |
} |
|
|
/** |
* Execute the given vertex/fragment program. |
* |
* \param ctx rendering context |
* \param program the program to execute |
* \param machine machine state (must be initialized) |
* \return GL_TRUE if program completed or GL_FALSE if program executed KIL. |
*/ |
GLboolean |
_mesa_execute_program(struct gl_context * ctx, |
const struct gl_program *program, |
struct gl_program_machine *machine) |
{ |
const GLuint numInst = program->NumInstructions; |
const GLuint maxExec = 65536; |
GLuint pc, numExec = 0; |
|
machine->CurProgram = program; |
|
if (DEBUG_PROG) { |
printf("execute program %u --------------------\n", program->Id); |
} |
|
if (program->Target == GL_VERTEX_PROGRAM_ARB) { |
machine->EnvParams = ctx->VertexProgram.Parameters; |
} |
else { |
machine->EnvParams = ctx->FragmentProgram.Parameters; |
} |
|
for (pc = 0; pc < numInst; pc++) { |
const struct prog_instruction *inst = program->Instructions + pc; |
|
if (DEBUG_PROG) { |
_mesa_print_instruction(inst); |
} |
|
switch (inst->Opcode) { |
case OPCODE_ABS: |
{ |
GLfloat a[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
result[0] = fabsf(a[0]); |
result[1] = fabsf(a[1]); |
result[2] = fabsf(a[2]); |
result[3] = fabsf(a[3]); |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_ADD: |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = a[0] + b[0]; |
result[1] = a[1] + b[1]; |
result[2] = a[2] + b[2]; |
result[3] = a[3] + b[3]; |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("ADD (%g %g %g %g) = (%g %g %g %g) + (%g %g %g %g)\n", |
result[0], result[1], result[2], result[3], |
a[0], a[1], a[2], a[3], b[0], b[1], b[2], b[3]); |
} |
} |
break; |
case OPCODE_ARL: |
{ |
GLfloat t[4]; |
fetch_vector4(&inst->SrcReg[0], machine, t); |
machine->AddressReg[0][0] = IFLOOR(t[0]); |
if (DEBUG_PROG) { |
printf("ARL %d\n", machine->AddressReg[0][0]); |
} |
} |
break; |
case OPCODE_BGNLOOP: |
/* no-op */ |
assert(program->Instructions[inst->BranchTarget].Opcode |
== OPCODE_ENDLOOP); |
break; |
case OPCODE_ENDLOOP: |
/* subtract 1 here since pc is incremented by for(pc) loop */ |
assert(program->Instructions[inst->BranchTarget].Opcode |
== OPCODE_BGNLOOP); |
pc = inst->BranchTarget - 1; /* go to matching BNGLOOP */ |
break; |
case OPCODE_BGNSUB: /* begin subroutine */ |
break; |
case OPCODE_ENDSUB: /* end subroutine */ |
break; |
case OPCODE_BRK: /* break out of loop (conditional) */ |
assert(program->Instructions[inst->BranchTarget].Opcode |
== OPCODE_ENDLOOP); |
if (eval_condition(machine, inst)) { |
/* break out of loop */ |
/* pc++ at end of for-loop will put us after the ENDLOOP inst */ |
pc = inst->BranchTarget; |
} |
break; |
case OPCODE_CONT: /* continue loop (conditional) */ |
assert(program->Instructions[inst->BranchTarget].Opcode |
== OPCODE_ENDLOOP); |
if (eval_condition(machine, inst)) { |
/* continue at ENDLOOP */ |
/* Subtract 1 here since we'll do pc++ at end of for-loop */ |
pc = inst->BranchTarget - 1; |
} |
break; |
case OPCODE_CAL: /* Call subroutine (conditional) */ |
if (eval_condition(machine, inst)) { |
/* call the subroutine */ |
if (machine->StackDepth >= MAX_PROGRAM_CALL_DEPTH) { |
return GL_TRUE; /* Per GL_NV_vertex_program2 spec */ |
} |
machine->CallStack[machine->StackDepth++] = pc + 1; /* next inst */ |
/* Subtract 1 here since we'll do pc++ at end of for-loop */ |
pc = inst->BranchTarget - 1; |
} |
break; |
case OPCODE_CMP: |
{ |
GLfloat a[4], b[4], c[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
fetch_vector4(&inst->SrcReg[2], machine, c); |
result[0] = a[0] < 0.0F ? b[0] : c[0]; |
result[1] = a[1] < 0.0F ? b[1] : c[1]; |
result[2] = a[2] < 0.0F ? b[2] : c[2]; |
result[3] = a[3] < 0.0F ? b[3] : c[3]; |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("CMP (%g %g %g %g) = (%g %g %g %g) < 0 ? (%g %g %g %g) : (%g %g %g %g)\n", |
result[0], result[1], result[2], result[3], |
a[0], a[1], a[2], a[3], |
b[0], b[1], b[2], b[3], |
c[0], c[1], c[2], c[3]); |
} |
} |
break; |
case OPCODE_COS: |
{ |
GLfloat a[4], result[4]; |
fetch_vector1(&inst->SrcReg[0], machine, a); |
result[0] = result[1] = result[2] = result[3] |
= (GLfloat) cos(a[0]); |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_DDX: /* Partial derivative with respect to X */ |
{ |
GLfloat result[4]; |
fetch_vector4_deriv(ctx, &inst->SrcReg[0], machine, |
'X', result); |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_DDY: /* Partial derivative with respect to Y */ |
{ |
GLfloat result[4]; |
fetch_vector4_deriv(ctx, &inst->SrcReg[0], machine, |
'Y', result); |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_DP2: |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = result[1] = result[2] = result[3] = DOT2(a, b); |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("DP2 %g = (%g %g) . (%g %g)\n", |
result[0], a[0], a[1], b[0], b[1]); |
} |
} |
break; |
case OPCODE_DP3: |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = result[1] = result[2] = result[3] = DOT3(a, b); |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("DP3 %g = (%g %g %g) . (%g %g %g)\n", |
result[0], a[0], a[1], a[2], b[0], b[1], b[2]); |
} |
} |
break; |
case OPCODE_DP4: |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = result[1] = result[2] = result[3] = DOT4(a, b); |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("DP4 %g = (%g, %g %g %g) . (%g, %g %g %g)\n", |
result[0], a[0], a[1], a[2], a[3], |
b[0], b[1], b[2], b[3]); |
} |
} |
break; |
case OPCODE_DPH: |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = result[1] = result[2] = result[3] = DOT3(a, b) + b[3]; |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_DST: /* Distance vector */ |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = 1.0F; |
result[1] = a[1] * b[1]; |
result[2] = a[2]; |
result[3] = b[3]; |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_EXP: |
{ |
GLfloat t[4], q[4], floor_t0; |
fetch_vector1(&inst->SrcReg[0], machine, t); |
floor_t0 = floorf(t[0]); |
if (floor_t0 > FLT_MAX_EXP) { |
SET_POS_INFINITY(q[0]); |
SET_POS_INFINITY(q[2]); |
} |
else if (floor_t0 < FLT_MIN_EXP) { |
q[0] = 0.0F; |
q[2] = 0.0F; |
} |
else { |
q[0] = ldexpf(1.0, (int) floor_t0); |
/* Note: GL_NV_vertex_program expects |
* result.z = result.x * APPX(result.y) |
* We do what the ARB extension says. |
*/ |
q[2] = (GLfloat) pow(2.0, t[0]); |
} |
q[1] = t[0] - floor_t0; |
q[3] = 1.0F; |
store_vector4( inst, machine, q ); |
} |
break; |
case OPCODE_EX2: /* Exponential base 2 */ |
{ |
GLfloat a[4], result[4], val; |
fetch_vector1(&inst->SrcReg[0], machine, a); |
val = (GLfloat) pow(2.0, a[0]); |
/* |
if (IS_INF_OR_NAN(val)) |
val = 1.0e10; |
*/ |
result[0] = result[1] = result[2] = result[3] = val; |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_FLR: |
{ |
GLfloat a[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
result[0] = floorf(a[0]); |
result[1] = floorf(a[1]); |
result[2] = floorf(a[2]); |
result[3] = floorf(a[3]); |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_FRC: |
{ |
GLfloat a[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
result[0] = a[0] - floorf(a[0]); |
result[1] = a[1] - floorf(a[1]); |
result[2] = a[2] - floorf(a[2]); |
result[3] = a[3] - floorf(a[3]); |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_IF: |
{ |
GLboolean cond; |
assert(program->Instructions[inst->BranchTarget].Opcode |
== OPCODE_ELSE || |
program->Instructions[inst->BranchTarget].Opcode |
== OPCODE_ENDIF); |
/* eval condition */ |
if (inst->SrcReg[0].File != PROGRAM_UNDEFINED) { |
GLfloat a[4]; |
fetch_vector1(&inst->SrcReg[0], machine, a); |
cond = (a[0] != 0.0); |
} |
else { |
cond = eval_condition(machine, inst); |
} |
if (DEBUG_PROG) { |
printf("IF: %d\n", cond); |
} |
/* do if/else */ |
if (cond) { |
/* do if-clause (just continue execution) */ |
} |
else { |
/* go to the instruction after ELSE or ENDIF */ |
assert(inst->BranchTarget >= 0); |
pc = inst->BranchTarget; |
} |
} |
break; |
case OPCODE_ELSE: |
/* goto ENDIF */ |
assert(program->Instructions[inst->BranchTarget].Opcode |
== OPCODE_ENDIF); |
assert(inst->BranchTarget >= 0); |
pc = inst->BranchTarget; |
break; |
case OPCODE_ENDIF: |
/* nothing */ |
break; |
case OPCODE_KIL_NV: /* NV_f_p only (conditional) */ |
if (eval_condition(machine, inst)) { |
return GL_FALSE; |
} |
break; |
case OPCODE_KIL: /* ARB_f_p only */ |
{ |
GLfloat a[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
if (DEBUG_PROG) { |
printf("KIL if (%g %g %g %g) <= 0.0\n", |
a[0], a[1], a[2], a[3]); |
} |
|
if (a[0] < 0.0F || a[1] < 0.0F || a[2] < 0.0F || a[3] < 0.0F) { |
return GL_FALSE; |
} |
} |
break; |
case OPCODE_LG2: /* log base 2 */ |
{ |
GLfloat a[4], result[4], val; |
fetch_vector1(&inst->SrcReg[0], machine, a); |
/* The fast LOG2 macro doesn't meet the precision requirements. |
*/ |
if (a[0] == 0.0F) { |
val = -FLT_MAX; |
} |
else { |
val = (float)(log(a[0]) * 1.442695F); |
} |
result[0] = result[1] = result[2] = result[3] = val; |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_LIT: |
{ |
const GLfloat epsilon = 1.0F / 256.0F; /* from NV VP spec */ |
GLfloat a[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
a[0] = MAX2(a[0], 0.0F); |
a[1] = MAX2(a[1], 0.0F); |
/* XXX ARB version clamps a[3], NV version doesn't */ |
a[3] = CLAMP(a[3], -(128.0F - epsilon), (128.0F - epsilon)); |
result[0] = 1.0F; |
result[1] = a[0]; |
/* XXX we could probably just use pow() here */ |
if (a[0] > 0.0F) { |
if (a[1] == 0.0 && a[3] == 0.0) |
result[2] = 1.0F; |
else |
result[2] = (GLfloat) pow(a[1], a[3]); |
} |
else { |
result[2] = 0.0F; |
} |
result[3] = 1.0F; |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("LIT (%g %g %g %g) : (%g %g %g %g)\n", |
result[0], result[1], result[2], result[3], |
a[0], a[1], a[2], a[3]); |
} |
} |
break; |
case OPCODE_LOG: |
{ |
GLfloat t[4], q[4], abs_t0; |
fetch_vector1(&inst->SrcReg[0], machine, t); |
abs_t0 = fabsf(t[0]); |
if (abs_t0 != 0.0F) { |
if (IS_INF_OR_NAN(abs_t0)) |
{ |
SET_POS_INFINITY(q[0]); |
q[1] = 1.0F; |
SET_POS_INFINITY(q[2]); |
} |
else { |
int exponent; |
GLfloat mantissa = frexpf(t[0], &exponent); |
q[0] = (GLfloat) (exponent - 1); |
q[1] = (GLfloat) (2.0 * mantissa); /* map [.5, 1) -> [1, 2) */ |
|
/* The fast LOG2 macro doesn't meet the precision |
* requirements. |
*/ |
q[2] = (float)(log(t[0]) * 1.442695F); |
} |
} |
else { |
SET_NEG_INFINITY(q[0]); |
q[1] = 1.0F; |
SET_NEG_INFINITY(q[2]); |
} |
q[3] = 1.0; |
store_vector4(inst, machine, q); |
} |
break; |
case OPCODE_LRP: |
{ |
GLfloat a[4], b[4], c[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
fetch_vector4(&inst->SrcReg[2], machine, c); |
result[0] = a[0] * b[0] + (1.0F - a[0]) * c[0]; |
result[1] = a[1] * b[1] + (1.0F - a[1]) * c[1]; |
result[2] = a[2] * b[2] + (1.0F - a[2]) * c[2]; |
result[3] = a[3] * b[3] + (1.0F - a[3]) * c[3]; |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("LRP (%g %g %g %g) = (%g %g %g %g), " |
"(%g %g %g %g), (%g %g %g %g)\n", |
result[0], result[1], result[2], result[3], |
a[0], a[1], a[2], a[3], |
b[0], b[1], b[2], b[3], c[0], c[1], c[2], c[3]); |
} |
} |
break; |
case OPCODE_MAD: |
{ |
GLfloat a[4], b[4], c[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
fetch_vector4(&inst->SrcReg[2], machine, c); |
result[0] = a[0] * b[0] + c[0]; |
result[1] = a[1] * b[1] + c[1]; |
result[2] = a[2] * b[2] + c[2]; |
result[3] = a[3] * b[3] + c[3]; |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("MAD (%g %g %g %g) = (%g %g %g %g) * " |
"(%g %g %g %g) + (%g %g %g %g)\n", |
result[0], result[1], result[2], result[3], |
a[0], a[1], a[2], a[3], |
b[0], b[1], b[2], b[3], c[0], c[1], c[2], c[3]); |
} |
} |
break; |
case OPCODE_MAX: |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = MAX2(a[0], b[0]); |
result[1] = MAX2(a[1], b[1]); |
result[2] = MAX2(a[2], b[2]); |
result[3] = MAX2(a[3], b[3]); |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("MAX (%g %g %g %g) = (%g %g %g %g), (%g %g %g %g)\n", |
result[0], result[1], result[2], result[3], |
a[0], a[1], a[2], a[3], b[0], b[1], b[2], b[3]); |
} |
} |
break; |
case OPCODE_MIN: |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = MIN2(a[0], b[0]); |
result[1] = MIN2(a[1], b[1]); |
result[2] = MIN2(a[2], b[2]); |
result[3] = MIN2(a[3], b[3]); |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_MOV: |
{ |
GLfloat result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, result); |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("MOV (%g %g %g %g)\n", |
result[0], result[1], result[2], result[3]); |
} |
} |
break; |
case OPCODE_MUL: |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = a[0] * b[0]; |
result[1] = a[1] * b[1]; |
result[2] = a[2] * b[2]; |
result[3] = a[3] * b[3]; |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("MUL (%g %g %g %g) = (%g %g %g %g) * (%g %g %g %g)\n", |
result[0], result[1], result[2], result[3], |
a[0], a[1], a[2], a[3], b[0], b[1], b[2], b[3]); |
} |
} |
break; |
case OPCODE_NOISE1: |
{ |
GLfloat a[4], result[4]; |
fetch_vector1(&inst->SrcReg[0], machine, a); |
result[0] = |
result[1] = |
result[2] = |
result[3] = _mesa_noise1(a[0]); |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_NOISE2: |
{ |
GLfloat a[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
result[0] = |
result[1] = |
result[2] = result[3] = _mesa_noise2(a[0], a[1]); |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_NOISE3: |
{ |
GLfloat a[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
result[0] = |
result[1] = |
result[2] = |
result[3] = _mesa_noise3(a[0], a[1], a[2]); |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_NOISE4: |
{ |
GLfloat a[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
result[0] = |
result[1] = |
result[2] = |
result[3] = _mesa_noise4(a[0], a[1], a[2], a[3]); |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_NOP: |
break; |
case OPCODE_POW: |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector1(&inst->SrcReg[0], machine, a); |
fetch_vector1(&inst->SrcReg[1], machine, b); |
result[0] = result[1] = result[2] = result[3] |
= (GLfloat) pow(a[0], b[0]); |
store_vector4(inst, machine, result); |
} |
break; |
|
case OPCODE_RCP: |
{ |
GLfloat a[4], result[4]; |
fetch_vector1(&inst->SrcReg[0], machine, a); |
if (DEBUG_PROG) { |
if (a[0] == 0) |
printf("RCP(0)\n"); |
else if (IS_INF_OR_NAN(a[0])) |
printf("RCP(inf)\n"); |
} |
result[0] = result[1] = result[2] = result[3] = 1.0F / a[0]; |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_RET: /* return from subroutine (conditional) */ |
if (eval_condition(machine, inst)) { |
if (machine->StackDepth == 0) { |
return GL_TRUE; /* Per GL_NV_vertex_program2 spec */ |
} |
/* subtract one because of pc++ in the for loop */ |
pc = machine->CallStack[--machine->StackDepth] - 1; |
} |
break; |
case OPCODE_RSQ: /* 1 / sqrt() */ |
{ |
GLfloat a[4], result[4]; |
fetch_vector1(&inst->SrcReg[0], machine, a); |
a[0] = fabsf(a[0]); |
result[0] = result[1] = result[2] = result[3] = 1.0f / sqrtf(a[0]); |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("RSQ %g = 1/sqrt(|%g|)\n", result[0], a[0]); |
} |
} |
break; |
case OPCODE_SCS: /* sine and cos */ |
{ |
GLfloat a[4], result[4]; |
fetch_vector1(&inst->SrcReg[0], machine, a); |
result[0] = (GLfloat) cos(a[0]); |
result[1] = (GLfloat) sin(a[0]); |
result[2] = 0.0; /* undefined! */ |
result[3] = 0.0; /* undefined! */ |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_SEQ: /* set on equal */ |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = (a[0] == b[0]) ? 1.0F : 0.0F; |
result[1] = (a[1] == b[1]) ? 1.0F : 0.0F; |
result[2] = (a[2] == b[2]) ? 1.0F : 0.0F; |
result[3] = (a[3] == b[3]) ? 1.0F : 0.0F; |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("SEQ (%g %g %g %g) = (%g %g %g %g) == (%g %g %g %g)\n", |
result[0], result[1], result[2], result[3], |
a[0], a[1], a[2], a[3], |
b[0], b[1], b[2], b[3]); |
} |
} |
break; |
case OPCODE_SGE: /* set on greater or equal */ |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = (a[0] >= b[0]) ? 1.0F : 0.0F; |
result[1] = (a[1] >= b[1]) ? 1.0F : 0.0F; |
result[2] = (a[2] >= b[2]) ? 1.0F : 0.0F; |
result[3] = (a[3] >= b[3]) ? 1.0F : 0.0F; |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("SGE (%g %g %g %g) = (%g %g %g %g) >= (%g %g %g %g)\n", |
result[0], result[1], result[2], result[3], |
a[0], a[1], a[2], a[3], |
b[0], b[1], b[2], b[3]); |
} |
} |
break; |
case OPCODE_SGT: /* set on greater */ |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = (a[0] > b[0]) ? 1.0F : 0.0F; |
result[1] = (a[1] > b[1]) ? 1.0F : 0.0F; |
result[2] = (a[2] > b[2]) ? 1.0F : 0.0F; |
result[3] = (a[3] > b[3]) ? 1.0F : 0.0F; |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("SGT (%g %g %g %g) = (%g %g %g %g) > (%g %g %g %g)\n", |
result[0], result[1], result[2], result[3], |
a[0], a[1], a[2], a[3], |
b[0], b[1], b[2], b[3]); |
} |
} |
break; |
case OPCODE_SIN: |
{ |
GLfloat a[4], result[4]; |
fetch_vector1(&inst->SrcReg[0], machine, a); |
result[0] = result[1] = result[2] = result[3] |
= (GLfloat) sin(a[0]); |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_SLE: /* set on less or equal */ |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = (a[0] <= b[0]) ? 1.0F : 0.0F; |
result[1] = (a[1] <= b[1]) ? 1.0F : 0.0F; |
result[2] = (a[2] <= b[2]) ? 1.0F : 0.0F; |
result[3] = (a[3] <= b[3]) ? 1.0F : 0.0F; |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("SLE (%g %g %g %g) = (%g %g %g %g) <= (%g %g %g %g)\n", |
result[0], result[1], result[2], result[3], |
a[0], a[1], a[2], a[3], |
b[0], b[1], b[2], b[3]); |
} |
} |
break; |
case OPCODE_SLT: /* set on less */ |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = (a[0] < b[0]) ? 1.0F : 0.0F; |
result[1] = (a[1] < b[1]) ? 1.0F : 0.0F; |
result[2] = (a[2] < b[2]) ? 1.0F : 0.0F; |
result[3] = (a[3] < b[3]) ? 1.0F : 0.0F; |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("SLT (%g %g %g %g) = (%g %g %g %g) < (%g %g %g %g)\n", |
result[0], result[1], result[2], result[3], |
a[0], a[1], a[2], a[3], |
b[0], b[1], b[2], b[3]); |
} |
} |
break; |
case OPCODE_SNE: /* set on not equal */ |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = (a[0] != b[0]) ? 1.0F : 0.0F; |
result[1] = (a[1] != b[1]) ? 1.0F : 0.0F; |
result[2] = (a[2] != b[2]) ? 1.0F : 0.0F; |
result[3] = (a[3] != b[3]) ? 1.0F : 0.0F; |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("SNE (%g %g %g %g) = (%g %g %g %g) != (%g %g %g %g)\n", |
result[0], result[1], result[2], result[3], |
a[0], a[1], a[2], a[3], |
b[0], b[1], b[2], b[3]); |
} |
} |
break; |
case OPCODE_SSG: /* set sign (-1, 0 or +1) */ |
{ |
GLfloat a[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
result[0] = (GLfloat) ((a[0] > 0.0F) - (a[0] < 0.0F)); |
result[1] = (GLfloat) ((a[1] > 0.0F) - (a[1] < 0.0F)); |
result[2] = (GLfloat) ((a[2] > 0.0F) - (a[2] < 0.0F)); |
result[3] = (GLfloat) ((a[3] > 0.0F) - (a[3] < 0.0F)); |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_SUB: |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = a[0] - b[0]; |
result[1] = a[1] - b[1]; |
result[2] = a[2] - b[2]; |
result[3] = a[3] - b[3]; |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("SUB (%g %g %g %g) = (%g %g %g %g) - (%g %g %g %g)\n", |
result[0], result[1], result[2], result[3], |
a[0], a[1], a[2], a[3], b[0], b[1], b[2], b[3]); |
} |
} |
break; |
case OPCODE_SWZ: /* extended swizzle */ |
{ |
const struct prog_src_register *source = &inst->SrcReg[0]; |
const GLfloat *src = get_src_register_pointer(source, machine); |
GLfloat result[4]; |
GLuint i; |
for (i = 0; i < 4; i++) { |
const GLuint swz = GET_SWZ(source->Swizzle, i); |
if (swz == SWIZZLE_ZERO) |
result[i] = 0.0; |
else if (swz == SWIZZLE_ONE) |
result[i] = 1.0; |
else { |
assert(swz <= 3); |
result[i] = src[swz]; |
} |
if (source->Negate & (1 << i)) |
result[i] = -result[i]; |
} |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_TEX: /* Both ARB and NV frag prog */ |
/* Simple texel lookup */ |
{ |
GLfloat texcoord[4], color[4]; |
fetch_vector4(&inst->SrcReg[0], machine, texcoord); |
|
/* For TEX, texcoord.Q should not be used and its value should not |
* matter (at most, we pass coord.xyz to texture3D() in GLSL). |
* Set Q=1 so that FetchTexelDeriv() doesn't get a garbage value |
* which is effectively what happens when the texcoord swizzle |
* is .xyzz |
*/ |
texcoord[3] = 1.0f; |
|
fetch_texel(ctx, machine, inst, texcoord, 0.0, color); |
|
if (DEBUG_PROG) { |
printf("TEX (%g, %g, %g, %g) = texture[%d][%g, %g, %g, %g]\n", |
color[0], color[1], color[2], color[3], |
inst->TexSrcUnit, |
texcoord[0], texcoord[1], texcoord[2], texcoord[3]); |
} |
store_vector4(inst, machine, color); |
} |
break; |
case OPCODE_TXB: /* GL_ARB_fragment_program only */ |
/* Texel lookup with LOD bias */ |
{ |
GLfloat texcoord[4], color[4], lodBias; |
|
fetch_vector4(&inst->SrcReg[0], machine, texcoord); |
|
/* texcoord[3] is the bias to add to lambda */ |
lodBias = texcoord[3]; |
|
fetch_texel(ctx, machine, inst, texcoord, lodBias, color); |
|
if (DEBUG_PROG) { |
printf("TXB (%g, %g, %g, %g) = texture[%d][%g %g %g %g]" |
" bias %g\n", |
color[0], color[1], color[2], color[3], |
inst->TexSrcUnit, |
texcoord[0], |
texcoord[1], |
texcoord[2], |
texcoord[3], |
lodBias); |
} |
|
store_vector4(inst, machine, color); |
} |
break; |
case OPCODE_TXD: /* GL_NV_fragment_program only */ |
/* Texture lookup w/ partial derivatives for LOD */ |
{ |
GLfloat texcoord[4], dtdx[4], dtdy[4], color[4]; |
fetch_vector4(&inst->SrcReg[0], machine, texcoord); |
fetch_vector4(&inst->SrcReg[1], machine, dtdx); |
fetch_vector4(&inst->SrcReg[2], machine, dtdy); |
machine->FetchTexelDeriv(ctx, texcoord, dtdx, dtdy, |
0.0, /* lodBias */ |
inst->TexSrcUnit, color); |
store_vector4(inst, machine, color); |
} |
break; |
case OPCODE_TXL: |
/* Texel lookup with explicit LOD */ |
{ |
GLfloat texcoord[4], color[4], lod; |
|
fetch_vector4(&inst->SrcReg[0], machine, texcoord); |
|
/* texcoord[3] is the LOD */ |
lod = texcoord[3]; |
|
machine->FetchTexelLod(ctx, texcoord, lod, |
machine->Samplers[inst->TexSrcUnit], color); |
|
store_vector4(inst, machine, color); |
} |
break; |
case OPCODE_TXP: /* GL_ARB_fragment_program only */ |
/* Texture lookup w/ projective divide */ |
{ |
GLfloat texcoord[4], color[4]; |
|
fetch_vector4(&inst->SrcReg[0], machine, texcoord); |
/* Not so sure about this test - if texcoord[3] is |
* zero, we'd probably be fine except for an assert in |
* IROUND_POS() which gets triggered by the inf values created. |
*/ |
if (texcoord[3] != 0.0) { |
texcoord[0] /= texcoord[3]; |
texcoord[1] /= texcoord[3]; |
texcoord[2] /= texcoord[3]; |
} |
|
fetch_texel(ctx, machine, inst, texcoord, 0.0, color); |
|
store_vector4(inst, machine, color); |
} |
break; |
case OPCODE_TXP_NV: /* GL_NV_fragment_program only */ |
/* Texture lookup w/ projective divide, as above, but do not |
* do the divide by w if sampling from a cube map. |
*/ |
{ |
GLfloat texcoord[4], color[4]; |
|
fetch_vector4(&inst->SrcReg[0], machine, texcoord); |
if (inst->TexSrcTarget != TEXTURE_CUBE_INDEX && |
texcoord[3] != 0.0) { |
texcoord[0] /= texcoord[3]; |
texcoord[1] /= texcoord[3]; |
texcoord[2] /= texcoord[3]; |
} |
|
fetch_texel(ctx, machine, inst, texcoord, 0.0, color); |
|
store_vector4(inst, machine, color); |
} |
break; |
case OPCODE_TRUNC: /* truncate toward zero */ |
{ |
GLfloat a[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
result[0] = (GLfloat) (GLint) a[0]; |
result[1] = (GLfloat) (GLint) a[1]; |
result[2] = (GLfloat) (GLint) a[2]; |
result[3] = (GLfloat) (GLint) a[3]; |
store_vector4(inst, machine, result); |
} |
break; |
case OPCODE_XPD: /* cross product */ |
{ |
GLfloat a[4], b[4], result[4]; |
fetch_vector4(&inst->SrcReg[0], machine, a); |
fetch_vector4(&inst->SrcReg[1], machine, b); |
result[0] = a[1] * b[2] - a[2] * b[1]; |
result[1] = a[2] * b[0] - a[0] * b[2]; |
result[2] = a[0] * b[1] - a[1] * b[0]; |
result[3] = 1.0; |
store_vector4(inst, machine, result); |
if (DEBUG_PROG) { |
printf("XPD (%g %g %g %g) = (%g %g %g) X (%g %g %g)\n", |
result[0], result[1], result[2], result[3], |
a[0], a[1], a[2], b[0], b[1], b[2]); |
} |
} |
break; |
case OPCODE_END: |
return GL_TRUE; |
default: |
_mesa_problem(ctx, "Bad opcode %d in _mesa_execute_program", |
inst->Opcode); |
return GL_TRUE; /* return value doesn't matter */ |
} |
|
numExec++; |
if (numExec > maxExec) { |
static GLboolean reported = GL_FALSE; |
if (!reported) { |
_mesa_problem(ctx, "Infinite loop detected in fragment program"); |
reported = GL_TRUE; |
} |
return GL_TRUE; |
} |
|
} /* for pc */ |
|
return GL_TRUE; |
} |