From d105412503ea250e07d3cb008f10f60e6e48bf8a Mon Sep 17 00:00:00 2001 From: marha Date: Fri, 5 Aug 2011 08:12:52 +0200 Subject: mesa pixman git update 5 aug 2011 --- mesalib/src/mesa/program/prog_execute.c | 3790 +++++++++++++++---------------- 1 file changed, 1895 insertions(+), 1895 deletions(-) (limited to 'mesalib/src/mesa/program/prog_execute.c') diff --git a/mesalib/src/mesa/program/prog_execute.c b/mesalib/src/mesa/program/prog_execute.c index 28a3e1e20..dbfd1b918 100644 --- a/mesalib/src/mesa/program/prog_execute.c +++ b/mesalib/src/mesa/program/prog_execute.c @@ -1,1895 +1,1895 @@ -/* - * 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]; - - case PROGRAM_SYSTEM_VALUE: - assert(reg < Elements(machine->SystemValues)); - return machine->SystemValues[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; -} +/* + * 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 (GLfloat *) prog->Parameters->ParameterValues[reg]; + + case PROGRAM_SYSTEM_VALUE: + assert(reg < Elements(machine->SystemValues)); + return machine->SystemValues[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; +} -- cgit v1.2.3