diff options
Diffstat (limited to 'mesalib/src/mesa/program/prog_execute.c')
| -rw-r--r-- | mesalib/src/mesa/program/prog_execute.c | 3770 |
1 files changed, 1891 insertions, 1879 deletions
diff --git a/mesalib/src/mesa/program/prog_execute.c b/mesalib/src/mesa/program/prog_execute.c index 2ae5bc572..4faed2663 100644 --- a/mesalib/src/mesa/program/prog_execute.c +++ b/mesalib/src/mesa/program/prog_execute.c @@ -1,1879 +1,1891 @@ -/* - * Mesa 3-D graphics library - * Version: 7.3 - * - * 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 - * BRIAN PAUL 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 "main/glheader.h" -#include "main/colormac.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. - */ -#if defined(USE_IEEE) || defined(_WIN32) -#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) -#elif defined(VMS) -#define SET_POS_INFINITY(x) x = __MAXFLOAT -#define SET_NEG_INFINITY(x) x = -__MAXFLOAT -#else -#define SET_POS_INFINITY(x) x = (GLfloat) HUGE_VAL -#define SET_NEG_INFINITY(x) x = (GLfloat) -HUGE_VAL -#endif - -#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 TRUE for +0 and other positive values, FALSE otherwise. - * Used for RCC opcode. - */ -static INLINE GLboolean -positive(float x) -{ - fi_type fi; - fi.f = x; - if (fi.i & 0x80000000) - return GL_FALSE; - return GL_TRUE; -} - - - -/** - * 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 >= FRAG_ATTRIB_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_LOCAL_PARAM: - if (reg >= MAX_PROGRAM_LOCAL_PARAMS) - return ZeroVec; - return machine->CurProgram->LocalParams[reg]; - - case PROGRAM_ENV_PARAM: - if (reg >= MAX_PROGRAM_ENV_PARAMS) - return ZeroVec; - return machine->EnvParams[reg]; - - case PROGRAM_STATE_VAR: - /* Fallthrough */ - case PROGRAM_CONSTANT: - /* Fallthrough */ - case PROGRAM_UNIFORM: - /* Fallthrough */ - case PROGRAM_NAMED_PARAM: - if (reg >= (GLint) prog->Parameters->NumParameters) - return ZeroVec; - return prog->Parameters->ParameterValues[reg]; - - default: - _mesa_problem(NULL, - "Invalid src register file %d in get_src_register_pointer()", - source->File); - return NULL; - } -} - - -/** - * 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]; - - case PROGRAM_WRITE_ONLY: - return dummyReg; - - default: - _mesa_problem(NULL, - "Invalid dest register file %d in get_dst_register_pointer()", - dest->File); - return NULL; - } -} - - - -/** - * 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); - ASSERT(src); - - 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 a 4-element uint vector from the given source register. - * Apply swizzling but not negation/abs. - */ -static void -fetch_vector4ui(const struct prog_src_register *source, - const struct gl_program_machine *machine, GLuint result[4]) -{ - const GLuint *src = (GLuint *) get_src_register_pointer(source, machine); - ASSERT(src); - - 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)]; - } - - /* Note: no Negate or Abs here */ -} - - - -/** - * 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(GLcontext * 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[FRAG_ATTRIB_WPOS][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); - ASSERT(src); - - result[0] = src[GET_SWZ(source->Swizzle, 0)]; - - if (source->Abs) { - result[0] = FABSF(result[0]); - } - if (source->Negate) { - result[0] = -result[0]; - } -} - - -static GLuint -fetch_vector1ui(const struct prog_src_register *source, - const struct gl_program_machine *machine) -{ - const GLuint *src = (GLuint *) get_src_register_pointer(source, machine); - return src[GET_SWZ(source->Swizzle, 0)]; -} - - -/** - * Fetch texel from texture. Use partial derivatives when possible. - */ -static INLINE void -fetch_texel(GLcontext *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 == FRAG_ATTRIB_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 - } -} - - -/** - * Store 4 uints into a register. Observe the set-condition-code flags. - */ -static void -store_vector4ui(const struct prog_instruction *inst, - struct gl_program_machine *machine, const GLuint value[4]) -{ - const struct prog_dst_register *dstReg = &(inst->DstReg); - GLuint writeMask = dstReg->WriteMask; - GLuint *dst = (GLuint *) get_dst_register_pointer(dstReg, machine); - - 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; - } - } - - 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((float)value[0]); - if (writeMask & WRITEMASK_Y) - machine->CondCodes[1] = generate_cc((float)value[1]); - if (writeMask & WRITEMASK_Z) - machine->CondCodes[2] = generate_cc((float)value[2]); - if (writeMask & WRITEMASK_W) - machine->CondCodes[3] = generate_cc((float)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(GLcontext * ctx, - const struct gl_program *program, - struct gl_program_machine *machine) -{ - const GLuint numInst = program->NumInstructions; - const GLuint maxExec = 10000; - 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_AND: /* bitwise AND */ - { - GLuint a[4], b[4], result[4]; - fetch_vector4ui(&inst->SrcReg[0], machine, a); - fetch_vector4ui(&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_vector4ui(inst, machine, result); - } - 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_BRA: /* branch (conditional) */ - if (eval_condition(machine, inst)) { - /* take branch */ - /* Subtract 1 here since we'll do pc++ below */ - pc = inst->BranchTarget - 1; - } - 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_DP2A: - { - GLfloat a[4], b[4], c, result[4]; - fetch_vector4(&inst->SrcReg[0], machine, a); - fetch_vector4(&inst->SrcReg[1], machine, b); - fetch_vector1(&inst->SrcReg[1], machine, &c); - result[0] = result[1] = result[2] = result[3] = DOT2(a, b) + c; - store_vector4(inst, machine, result); - if (DEBUG_PROG) { - printf("DP2A %g = (%g %g) . (%g %g) + %g\n", - result[0], a[0], a[1], b[0], b[1], c); - } - } - 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) { - /* Since we really can't handle infinite values on VMS - * like other OSes we'll use __MAXFLOAT to represent - * infinity. This may need some tweaking. - */ -#ifdef VMS - if (abs_t0 == __MAXFLOAT) -#else - if (IS_INF_OR_NAN(abs_t0)) -#endif - { - 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_NOT: /* bitwise NOT */ - { - GLuint a[4], result[4]; - fetch_vector4ui(&inst->SrcReg[0], machine, a); - result[0] = ~a[0]; - result[1] = ~a[1]; - result[2] = ~a[2]; - result[3] = ~a[3]; - store_vector4ui(inst, machine, result); - } - break; - case OPCODE_NRM3: /* 3-component normalization */ - { - GLfloat a[4], result[4]; - GLfloat tmp; - fetch_vector4(&inst->SrcReg[0], machine, a); - tmp = a[0] * a[0] + a[1] * a[1] + a[2] * a[2]; - if (tmp != 0.0F) - tmp = INV_SQRTF(tmp); - result[0] = tmp * a[0]; - result[1] = tmp * a[1]; - result[2] = tmp * a[2]; - result[3] = 0.0; /* undefined, but prevent valgrind warnings */ - store_vector4(inst, machine, result); - } - break; - case OPCODE_NRM4: /* 4-component normalization */ - { - GLfloat a[4], result[4]; - GLfloat tmp; - fetch_vector4(&inst->SrcReg[0], machine, a); - tmp = a[0] * a[0] + a[1] * a[1] + a[2] * a[2] + a[3] * a[3]; - if (tmp != 0.0F) - tmp = INV_SQRTF(tmp); - result[0] = tmp * a[0]; - result[1] = tmp * a[1]; - result[2] = tmp * a[2]; - result[3] = tmp * a[3]; - store_vector4(inst, machine, result); - } - break; - case OPCODE_OR: /* bitwise OR */ - { - GLuint a[4], b[4], result[4]; - fetch_vector4ui(&inst->SrcReg[0], machine, a); - fetch_vector4ui(&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_vector4ui(inst, machine, result); - } - break; - case OPCODE_PK2H: /* pack two 16-bit floats in one 32-bit float */ - { - GLfloat a[4]; - GLuint result[4]; - GLhalfNV hx, hy; - fetch_vector4(&inst->SrcReg[0], machine, a); - hx = _mesa_float_to_half(a[0]); - hy = _mesa_float_to_half(a[1]); - result[0] = - result[1] = - result[2] = - result[3] = hx | (hy << 16); - store_vector4ui(inst, machine, result); - } - break; - case OPCODE_PK2US: /* pack two GLushorts into one 32-bit float */ - { - GLfloat a[4]; - GLuint result[4], usx, usy; - fetch_vector4(&inst->SrcReg[0], machine, a); - a[0] = CLAMP(a[0], 0.0F, 1.0F); - a[1] = CLAMP(a[1], 0.0F, 1.0F); - usx = IROUND(a[0] * 65535.0F); - usy = IROUND(a[1] * 65535.0F); - result[0] = - result[1] = - result[2] = - result[3] = usx | (usy << 16); - store_vector4ui(inst, machine, result); - } - break; - case OPCODE_PK4B: /* pack four GLbytes into one 32-bit float */ - { - GLfloat a[4]; - GLuint result[4], ubx, uby, ubz, ubw; - fetch_vector4(&inst->SrcReg[0], machine, a); - a[0] = CLAMP(a[0], -128.0F / 127.0F, 1.0F); - a[1] = CLAMP(a[1], -128.0F / 127.0F, 1.0F); - a[2] = CLAMP(a[2], -128.0F / 127.0F, 1.0F); - a[3] = CLAMP(a[3], -128.0F / 127.0F, 1.0F); - ubx = IROUND(127.0F * a[0] + 128.0F); - uby = IROUND(127.0F * a[1] + 128.0F); - ubz = IROUND(127.0F * a[2] + 128.0F); - ubw = IROUND(127.0F * a[3] + 128.0F); - result[0] = - result[1] = - result[2] = - result[3] = ubx | (uby << 8) | (ubz << 16) | (ubw << 24); - store_vector4ui(inst, machine, result); - } - break; - case OPCODE_PK4UB: /* pack four GLubytes into one 32-bit float */ - { - GLfloat a[4]; - GLuint result[4], ubx, uby, ubz, ubw; - fetch_vector4(&inst->SrcReg[0], machine, a); - a[0] = CLAMP(a[0], 0.0F, 1.0F); - a[1] = CLAMP(a[1], 0.0F, 1.0F); - a[2] = CLAMP(a[2], 0.0F, 1.0F); - a[3] = CLAMP(a[3], 0.0F, 1.0F); - ubx = IROUND(255.0F * a[0]); - uby = IROUND(255.0F * a[1]); - ubz = IROUND(255.0F * a[2]); - ubw = IROUND(255.0F * a[3]); - result[0] = - result[1] = - result[2] = - result[3] = ubx | (uby << 8) | (ubz << 16) | (ubw << 24); - store_vector4ui(inst, machine, result); - } - 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_RCC: /* clamped riciprocal */ - { - const float largest = 1.884467e+19, smallest = 5.42101e-20; - GLfloat a[4], r, result[4]; - fetch_vector1(&inst->SrcReg[0], machine, a); - if (DEBUG_PROG) { - if (a[0] == 0) - printf("RCC(0)\n"); - else if (IS_INF_OR_NAN(a[0])) - printf("RCC(inf)\n"); - } - if (a[0] == 1.0F) { - r = 1.0F; - } - else { - r = 1.0F / a[0]; - } - if (positive(r)) { - if (r > largest) { - r = largest; - } - else if (r < smallest) { - r = smallest; - } - } - else { - if (r < -largest) { - r = -largest; - } - else if (r > -smallest) { - r = -smallest; - } - } - result[0] = result[1] = result[2] = result[3] = r; - 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_RFL: /* reflection vector */ - { - GLfloat axis[4], dir[4], result[4], tmpX, tmpW; - fetch_vector4(&inst->SrcReg[0], machine, axis); - fetch_vector4(&inst->SrcReg[1], machine, dir); - tmpW = DOT3(axis, axis); - tmpX = (2.0F * DOT3(axis, dir)) / tmpW; - result[0] = tmpX * axis[0] - dir[0]; - result[1] = tmpX * axis[1] - dir[1]; - result[2] = tmpX * axis[2] - dir[2]; - /* result[3] is never written! XXX enforce in parser! */ - store_vector4(inst, machine, result); - } - 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] = INV_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_SFL: /* set false, operands ignored */ - { - static const GLfloat result[4] = { 0.0F, 0.0F, 0.0F, 0.0F }; - store_vector4(inst, machine, result); - } - 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_STR: /* set true, operands ignored */ - { - static const GLfloat result[4] = { 1.0F, 1.0F, 1.0F, 1.0F }; - 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 >= 0); - 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); - - 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); - - 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_UP2H: /* unpack two 16-bit floats */ - { - const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine); - GLfloat result[4]; - GLushort hx, hy; - hx = raw & 0xffff; - hy = raw >> 16; - result[0] = result[2] = _mesa_half_to_float(hx); - result[1] = result[3] = _mesa_half_to_float(hy); - store_vector4(inst, machine, result); - } - break; - case OPCODE_UP2US: /* unpack two GLushorts */ - { - const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine); - GLfloat result[4]; - GLushort usx, usy; - usx = raw & 0xffff; - usy = raw >> 16; - result[0] = result[2] = usx * (1.0f / 65535.0f); - result[1] = result[3] = usy * (1.0f / 65535.0f); - store_vector4(inst, machine, result); - } - break; - case OPCODE_UP4B: /* unpack four GLbytes */ - { - const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine); - GLfloat result[4]; - result[0] = (((raw >> 0) & 0xff) - 128) / 127.0F; - result[1] = (((raw >> 8) & 0xff) - 128) / 127.0F; - result[2] = (((raw >> 16) & 0xff) - 128) / 127.0F; - result[3] = (((raw >> 24) & 0xff) - 128) / 127.0F; - store_vector4(inst, machine, result); - } - break; - case OPCODE_UP4UB: /* unpack four GLubytes */ - { - const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine); - GLfloat result[4]; - result[0] = ((raw >> 0) & 0xff) / 255.0F; - result[1] = ((raw >> 8) & 0xff) / 255.0F; - result[2] = ((raw >> 16) & 0xff) / 255.0F; - result[3] = ((raw >> 24) & 0xff) / 255.0F; - store_vector4(inst, machine, result); - } - break; - case OPCODE_XOR: /* bitwise XOR */ - { - GLuint a[4], b[4], result[4]; - fetch_vector4ui(&inst->SrcReg[0], machine, a); - fetch_vector4ui(&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_vector4ui(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_X2D: /* 2-D matrix transform */ - { - 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] + b[1] * c[1]; - result[1] = a[1] + b[0] * c[2] + b[1] * c[3]; - result[2] = a[2] + b[0] * c[0] + b[1] * c[1]; - result[3] = a[3] + b[0] * c[2] + b[1] * c[3]; - store_vector4(inst, machine, result); - } - break; - case OPCODE_PRINT: - { - if (inst->SrcReg[0].File != PROGRAM_UNDEFINED) { - GLfloat a[4]; - fetch_vector4(&inst->SrcReg[0], machine, a); - printf("%s%g, %g, %g, %g\n", (const char *) inst->Data, - a[0], a[1], a[2], a[3]); - } - else { - printf("%s\n", (const char *) inst->Data); - } - } - 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; -} +/*
+ * Mesa 3-D graphics library
+ * Version: 7.3
+ *
+ * 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
+ * BRIAN PAUL 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 "main/glheader.h"
+#include "main/colormac.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.
+ */
+#if defined(USE_IEEE) || defined(_WIN32)
+#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)
+#elif defined(VMS)
+#define SET_POS_INFINITY(x) x = __MAXFLOAT
+#define SET_NEG_INFINITY(x) x = -__MAXFLOAT
+#else
+#define SET_POS_INFINITY(x) x = (GLfloat) HUGE_VAL
+#define SET_NEG_INFINITY(x) x = (GLfloat) -HUGE_VAL
+#endif
+
+#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 TRUE for +0 and other positive values, FALSE otherwise.
+ * Used for RCC opcode.
+ */
+static INLINE GLboolean
+positive(float x)
+{
+ fi_type fi;
+ fi.f = x;
+ if (fi.i & 0x80000000)
+ return GL_FALSE;
+ return GL_TRUE;
+}
+
+
+
+/**
+ * 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 >= FRAG_ATTRIB_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_LOCAL_PARAM:
+ if (reg >= MAX_PROGRAM_LOCAL_PARAMS)
+ return ZeroVec;
+ return machine->CurProgram->LocalParams[reg];
+
+ case PROGRAM_ENV_PARAM:
+ if (reg >= MAX_PROGRAM_ENV_PARAMS)
+ return ZeroVec;
+ return machine->EnvParams[reg];
+
+ case PROGRAM_STATE_VAR:
+ /* Fallthrough */
+ case PROGRAM_CONSTANT:
+ /* Fallthrough */
+ case PROGRAM_UNIFORM:
+ /* Fallthrough */
+ case PROGRAM_NAMED_PARAM:
+ if (reg >= (GLint) prog->Parameters->NumParameters)
+ return ZeroVec;
+ return prog->Parameters->ParameterValues[reg];
+
+ default:
+ _mesa_problem(NULL,
+ "Invalid src register file %d in get_src_register_pointer()",
+ source->File);
+ return NULL;
+ }
+}
+
+
+/**
+ * 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];
+
+ case PROGRAM_WRITE_ONLY:
+ return dummyReg;
+
+ default:
+ _mesa_problem(NULL,
+ "Invalid dest register file %d in get_dst_register_pointer()",
+ dest->File);
+ return NULL;
+ }
+}
+
+
+
+/**
+ * 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);
+ ASSERT(src);
+
+ 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 a 4-element uint vector from the given source register.
+ * Apply swizzling but not negation/abs.
+ */
+static void
+fetch_vector4ui(const struct prog_src_register *source,
+ const struct gl_program_machine *machine, GLuint result[4])
+{
+ const GLuint *src = (GLuint *) get_src_register_pointer(source, machine);
+ ASSERT(src);
+
+ 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)];
+ }
+
+ /* Note: no Negate or Abs here */
+}
+
+
+
+/**
+ * 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[FRAG_ATTRIB_WPOS][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);
+ ASSERT(src);
+
+ result[0] = src[GET_SWZ(source->Swizzle, 0)];
+
+ if (source->Abs) {
+ result[0] = FABSF(result[0]);
+ }
+ if (source->Negate) {
+ result[0] = -result[0];
+ }
+}
+
+
+static GLuint
+fetch_vector1ui(const struct prog_src_register *source,
+ const struct gl_program_machine *machine)
+{
+ const GLuint *src = (GLuint *) get_src_register_pointer(source, machine);
+ return src[GET_SWZ(source->Swizzle, 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 == FRAG_ATTRIB_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
+ }
+}
+
+
+/**
+ * Store 4 uints into a register. Observe the set-condition-code flags.
+ */
+static void
+store_vector4ui(const struct prog_instruction *inst,
+ struct gl_program_machine *machine, const GLuint value[4])
+{
+ const struct prog_dst_register *dstReg = &(inst->DstReg);
+ GLuint writeMask = dstReg->WriteMask;
+ GLuint *dst = (GLuint *) get_dst_register_pointer(dstReg, machine);
+
+ 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;
+ }
+ }
+
+ 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((float)value[0]);
+ if (writeMask & WRITEMASK_Y)
+ machine->CondCodes[1] = generate_cc((float)value[1]);
+ if (writeMask & WRITEMASK_Z)
+ machine->CondCodes[2] = generate_cc((float)value[2]);
+ if (writeMask & WRITEMASK_W)
+ machine->CondCodes[3] = generate_cc((float)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 = 10000;
+ 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_AND: /* bitwise AND */
+ {
+ GLuint a[4], b[4], result[4];
+ fetch_vector4ui(&inst->SrcReg[0], machine, a);
+ fetch_vector4ui(&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_vector4ui(inst, machine, result);
+ }
+ 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_BRA: /* branch (conditional) */
+ if (eval_condition(machine, inst)) {
+ /* take branch */
+ /* Subtract 1 here since we'll do pc++ below */
+ pc = inst->BranchTarget - 1;
+ }
+ 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_DP2A:
+ {
+ GLfloat a[4], b[4], c, result[4];
+ fetch_vector4(&inst->SrcReg[0], machine, a);
+ fetch_vector4(&inst->SrcReg[1], machine, b);
+ fetch_vector1(&inst->SrcReg[1], machine, &c);
+ result[0] = result[1] = result[2] = result[3] = DOT2(a, b) + c;
+ store_vector4(inst, machine, result);
+ if (DEBUG_PROG) {
+ printf("DP2A %g = (%g %g) . (%g %g) + %g\n",
+ result[0], a[0], a[1], b[0], b[1], c);
+ }
+ }
+ 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) {
+ /* Since we really can't handle infinite values on VMS
+ * like other OSes we'll use __MAXFLOAT to represent
+ * infinity. This may need some tweaking.
+ */
+#ifdef VMS
+ if (abs_t0 == __MAXFLOAT)
+#else
+ if (IS_INF_OR_NAN(abs_t0))
+#endif
+ {
+ 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_NOT: /* bitwise NOT */
+ {
+ GLuint a[4], result[4];
+ fetch_vector4ui(&inst->SrcReg[0], machine, a);
+ result[0] = ~a[0];
+ result[1] = ~a[1];
+ result[2] = ~a[2];
+ result[3] = ~a[3];
+ store_vector4ui(inst, machine, result);
+ }
+ break;
+ case OPCODE_NRM3: /* 3-component normalization */
+ {
+ GLfloat a[4], result[4];
+ GLfloat tmp;
+ fetch_vector4(&inst->SrcReg[0], machine, a);
+ tmp = a[0] * a[0] + a[1] * a[1] + a[2] * a[2];
+ if (tmp != 0.0F)
+ tmp = INV_SQRTF(tmp);
+ result[0] = tmp * a[0];
+ result[1] = tmp * a[1];
+ result[2] = tmp * a[2];
+ result[3] = 0.0; /* undefined, but prevent valgrind warnings */
+ store_vector4(inst, machine, result);
+ }
+ break;
+ case OPCODE_NRM4: /* 4-component normalization */
+ {
+ GLfloat a[4], result[4];
+ GLfloat tmp;
+ fetch_vector4(&inst->SrcReg[0], machine, a);
+ tmp = a[0] * a[0] + a[1] * a[1] + a[2] * a[2] + a[3] * a[3];
+ if (tmp != 0.0F)
+ tmp = INV_SQRTF(tmp);
+ result[0] = tmp * a[0];
+ result[1] = tmp * a[1];
+ result[2] = tmp * a[2];
+ result[3] = tmp * a[3];
+ store_vector4(inst, machine, result);
+ }
+ break;
+ case OPCODE_OR: /* bitwise OR */
+ {
+ GLuint a[4], b[4], result[4];
+ fetch_vector4ui(&inst->SrcReg[0], machine, a);
+ fetch_vector4ui(&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_vector4ui(inst, machine, result);
+ }
+ break;
+ case OPCODE_PK2H: /* pack two 16-bit floats in one 32-bit float */
+ {
+ GLfloat a[4];
+ GLuint result[4];
+ GLhalfNV hx, hy;
+ fetch_vector4(&inst->SrcReg[0], machine, a);
+ hx = _mesa_float_to_half(a[0]);
+ hy = _mesa_float_to_half(a[1]);
+ result[0] =
+ result[1] =
+ result[2] =
+ result[3] = hx | (hy << 16);
+ store_vector4ui(inst, machine, result);
+ }
+ break;
+ case OPCODE_PK2US: /* pack two GLushorts into one 32-bit float */
+ {
+ GLfloat a[4];
+ GLuint result[4], usx, usy;
+ fetch_vector4(&inst->SrcReg[0], machine, a);
+ a[0] = CLAMP(a[0], 0.0F, 1.0F);
+ a[1] = CLAMP(a[1], 0.0F, 1.0F);
+ usx = IROUND(a[0] * 65535.0F);
+ usy = IROUND(a[1] * 65535.0F);
+ result[0] =
+ result[1] =
+ result[2] =
+ result[3] = usx | (usy << 16);
+ store_vector4ui(inst, machine, result);
+ }
+ break;
+ case OPCODE_PK4B: /* pack four GLbytes into one 32-bit float */
+ {
+ GLfloat a[4];
+ GLuint result[4], ubx, uby, ubz, ubw;
+ fetch_vector4(&inst->SrcReg[0], machine, a);
+ a[0] = CLAMP(a[0], -128.0F / 127.0F, 1.0F);
+ a[1] = CLAMP(a[1], -128.0F / 127.0F, 1.0F);
+ a[2] = CLAMP(a[2], -128.0F / 127.0F, 1.0F);
+ a[3] = CLAMP(a[3], -128.0F / 127.0F, 1.0F);
+ ubx = IROUND(127.0F * a[0] + 128.0F);
+ uby = IROUND(127.0F * a[1] + 128.0F);
+ ubz = IROUND(127.0F * a[2] + 128.0F);
+ ubw = IROUND(127.0F * a[3] + 128.0F);
+ result[0] =
+ result[1] =
+ result[2] =
+ result[3] = ubx | (uby << 8) | (ubz << 16) | (ubw << 24);
+ store_vector4ui(inst, machine, result);
+ }
+ break;
+ case OPCODE_PK4UB: /* pack four GLubytes into one 32-bit float */
+ {
+ GLfloat a[4];
+ GLuint result[4], ubx, uby, ubz, ubw;
+ fetch_vector4(&inst->SrcReg[0], machine, a);
+ a[0] = CLAMP(a[0], 0.0F, 1.0F);
+ a[1] = CLAMP(a[1], 0.0F, 1.0F);
+ a[2] = CLAMP(a[2], 0.0F, 1.0F);
+ a[3] = CLAMP(a[3], 0.0F, 1.0F);
+ ubx = IROUND(255.0F * a[0]);
+ uby = IROUND(255.0F * a[1]);
+ ubz = IROUND(255.0F * a[2]);
+ ubw = IROUND(255.0F * a[3]);
+ result[0] =
+ result[1] =
+ result[2] =
+ result[3] = ubx | (uby << 8) | (ubz << 16) | (ubw << 24);
+ store_vector4ui(inst, machine, result);
+ }
+ 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_RCC: /* clamped riciprocal */
+ {
+ const float largest = 1.884467e+19, smallest = 5.42101e-20;
+ GLfloat a[4], r, result[4];
+ fetch_vector1(&inst->SrcReg[0], machine, a);
+ if (DEBUG_PROG) {
+ if (a[0] == 0)
+ printf("RCC(0)\n");
+ else if (IS_INF_OR_NAN(a[0]))
+ printf("RCC(inf)\n");
+ }
+ if (a[0] == 1.0F) {
+ r = 1.0F;
+ }
+ else {
+ r = 1.0F / a[0];
+ }
+ if (positive(r)) {
+ if (r > largest) {
+ r = largest;
+ }
+ else if (r < smallest) {
+ r = smallest;
+ }
+ }
+ else {
+ if (r < -largest) {
+ r = -largest;
+ }
+ else if (r > -smallest) {
+ r = -smallest;
+ }
+ }
+ result[0] = result[1] = result[2] = result[3] = r;
+ 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_RFL: /* reflection vector */
+ {
+ GLfloat axis[4], dir[4], result[4], tmpX, tmpW;
+ fetch_vector4(&inst->SrcReg[0], machine, axis);
+ fetch_vector4(&inst->SrcReg[1], machine, dir);
+ tmpW = DOT3(axis, axis);
+ tmpX = (2.0F * DOT3(axis, dir)) / tmpW;
+ result[0] = tmpX * axis[0] - dir[0];
+ result[1] = tmpX * axis[1] - dir[1];
+ result[2] = tmpX * axis[2] - dir[2];
+ /* result[3] is never written! XXX enforce in parser! */
+ store_vector4(inst, machine, result);
+ }
+ 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] = INV_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_SFL: /* set false, operands ignored */
+ {
+ static const GLfloat result[4] = { 0.0F, 0.0F, 0.0F, 0.0F };
+ store_vector4(inst, machine, result);
+ }
+ 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_STR: /* set true, operands ignored */
+ {
+ static const GLfloat result[4] = { 1.0F, 1.0F, 1.0F, 1.0F };
+ 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 >= 0);
+ 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);
+
+ 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_UP2H: /* unpack two 16-bit floats */
+ {
+ const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine);
+ GLfloat result[4];
+ GLushort hx, hy;
+ hx = raw & 0xffff;
+ hy = raw >> 16;
+ result[0] = result[2] = _mesa_half_to_float(hx);
+ result[1] = result[3] = _mesa_half_to_float(hy);
+ store_vector4(inst, machine, result);
+ }
+ break;
+ case OPCODE_UP2US: /* unpack two GLushorts */
+ {
+ const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine);
+ GLfloat result[4];
+ GLushort usx, usy;
+ usx = raw & 0xffff;
+ usy = raw >> 16;
+ result[0] = result[2] = usx * (1.0f / 65535.0f);
+ result[1] = result[3] = usy * (1.0f / 65535.0f);
+ store_vector4(inst, machine, result);
+ }
+ break;
+ case OPCODE_UP4B: /* unpack four GLbytes */
+ {
+ const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine);
+ GLfloat result[4];
+ result[0] = (((raw >> 0) & 0xff) - 128) / 127.0F;
+ result[1] = (((raw >> 8) & 0xff) - 128) / 127.0F;
+ result[2] = (((raw >> 16) & 0xff) - 128) / 127.0F;
+ result[3] = (((raw >> 24) & 0xff) - 128) / 127.0F;
+ store_vector4(inst, machine, result);
+ }
+ break;
+ case OPCODE_UP4UB: /* unpack four GLubytes */
+ {
+ const GLuint raw = fetch_vector1ui(&inst->SrcReg[0], machine);
+ GLfloat result[4];
+ result[0] = ((raw >> 0) & 0xff) / 255.0F;
+ result[1] = ((raw >> 8) & 0xff) / 255.0F;
+ result[2] = ((raw >> 16) & 0xff) / 255.0F;
+ result[3] = ((raw >> 24) & 0xff) / 255.0F;
+ store_vector4(inst, machine, result);
+ }
+ break;
+ case OPCODE_XOR: /* bitwise XOR */
+ {
+ GLuint a[4], b[4], result[4];
+ fetch_vector4ui(&inst->SrcReg[0], machine, a);
+ fetch_vector4ui(&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_vector4ui(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_X2D: /* 2-D matrix transform */
+ {
+ 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] + b[1] * c[1];
+ result[1] = a[1] + b[0] * c[2] + b[1] * c[3];
+ result[2] = a[2] + b[0] * c[0] + b[1] * c[1];
+ result[3] = a[3] + b[0] * c[2] + b[1] * c[3];
+ store_vector4(inst, machine, result);
+ }
+ break;
+ case OPCODE_PRINT:
+ {
+ if (inst->SrcReg[0].File != PROGRAM_UNDEFINED) {
+ GLfloat a[4];
+ fetch_vector4(&inst->SrcReg[0], machine, a);
+ printf("%s%g, %g, %g, %g\n", (const char *) inst->Data,
+ a[0], a[1], a[2], a[3]);
+ }
+ else {
+ printf("%s\n", (const char *) inst->Data);
+ }
+ }
+ 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;
+}
|