+++ /dev/null
-/*
- * Mesa 3-D graphics library
- * Version: 6.5.2
- *
- * Copyright (C) 1999-2006 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 nvvertexec.c
- * Code to execute vertex programs.
- * \author Brian Paul
- */
-
-#include "glheader.h"
-#include "context.h"
-#include "imports.h"
-#include "macros.h"
-#include "nvvertexec.h"
-#include "prog_parameter.h"
-#include "prog_statevars.h"
-#include "prog_instruction.h"
-#include "math/m_matrix.h"
-
-
-static const GLboolean DEBUG_VERT = GL_FALSE;
-
-static const GLfloat ZeroVec[4] = { 0.0F, 0.0F, 0.0F, 0.0F };
-
-
-/**
- * Load/initialize the vertex program registers which need to be set
- * per-vertex.
- */
-void
-_mesa_init_vp_per_vertex_registers(GLcontext *ctx, struct vp_machine *machine)
-{
- /* Input registers get initialized from the current vertex attribs */
- MEMCPY(machine->Inputs, ctx->Current.Attrib,
- MAX_VERTEX_PROGRAM_ATTRIBS * 4 * sizeof(GLfloat));
-
- if (ctx->VertexProgram.Current->IsNVProgram) {
- GLuint i;
- /* Output/result regs are initialized to [0,0,0,1] */
- for (i = 0; i < MAX_NV_VERTEX_PROGRAM_OUTPUTS; i++) {
- ASSIGN_4V(machine->Outputs[i], 0.0F, 0.0F, 0.0F, 1.0F);
- }
- /* Temp regs are initialized to [0,0,0,0] */
- for (i = 0; i < MAX_NV_VERTEX_PROGRAM_TEMPS; i++) {
- ASSIGN_4V(machine->Temporaries[i], 0.0F, 0.0F, 0.0F, 0.0F);
- }
- for (i = 0; i < MAX_VERTEX_PROGRAM_ADDRESS_REGS; i++) {
- ASSIGN_4V(machine->AddressReg[i], 0, 0, 0, 0);
- }
- }
-
- /* init condition codes */
- machine->CondCodes[0] = COND_EQ;
- machine->CondCodes[1] = COND_EQ;
- machine->CondCodes[2] = COND_EQ;
- machine->CondCodes[3] = COND_EQ;
-}
-
-
-
-/**
- * Copy the 16 elements of a matrix into four consecutive program
- * registers starting at 'pos'.
- */
-static void
-load_matrix(GLfloat registers[][4], GLuint pos, const GLfloat mat[16])
-{
- GLuint i;
- for (i = 0; i < 4; i++) {
- registers[pos + i][0] = mat[0 + i];
- registers[pos + i][1] = mat[4 + i];
- registers[pos + i][2] = mat[8 + i];
- registers[pos + i][3] = mat[12 + i];
- }
-}
-
-
-/**
- * As above, but transpose the matrix.
- */
-static void
-load_transpose_matrix(GLfloat registers[][4], GLuint pos,
- const GLfloat mat[16])
-{
- MEMCPY(registers[pos], mat, 16 * sizeof(GLfloat));
-}
-
-
-/**
- * Load program parameter registers with tracked matrices (if NV program)
- * or GL state values (if ARB program).
- * This needs to be done per glBegin/glEnd, not per-vertex.
- */
-void
-_mesa_init_vp_per_primitive_registers(GLcontext *ctx)
-{
- if (ctx->VertexProgram.Current->IsNVProgram) {
- GLuint i;
-
- for (i = 0; i < MAX_NV_VERTEX_PROGRAM_PARAMS / 4; i++) {
- /* point 'mat' at source matrix */
- GLmatrix *mat;
- if (ctx->VertexProgram.TrackMatrix[i] == GL_MODELVIEW) {
- mat = ctx->ModelviewMatrixStack.Top;
- }
- else if (ctx->VertexProgram.TrackMatrix[i] == GL_PROJECTION) {
- mat = ctx->ProjectionMatrixStack.Top;
- }
- else if (ctx->VertexProgram.TrackMatrix[i] == GL_TEXTURE) {
- mat = ctx->TextureMatrixStack[ctx->Texture.CurrentUnit].Top;
- }
- else if (ctx->VertexProgram.TrackMatrix[i] == GL_COLOR) {
- mat = ctx->ColorMatrixStack.Top;
- }
- else if (ctx->VertexProgram.TrackMatrix[i]==GL_MODELVIEW_PROJECTION_NV) {
- /* XXX verify the combined matrix is up to date */
- mat = &ctx->_ModelProjectMatrix;
- }
- else if (ctx->VertexProgram.TrackMatrix[i] >= GL_MATRIX0_NV &&
- ctx->VertexProgram.TrackMatrix[i] <= GL_MATRIX7_NV) {
- GLuint n = ctx->VertexProgram.TrackMatrix[i] - GL_MATRIX0_NV;
- ASSERT(n < MAX_PROGRAM_MATRICES);
- mat = ctx->ProgramMatrixStack[n].Top;
- }
- else {
- /* no matrix is tracked, but we leave the register values as-is */
- assert(ctx->VertexProgram.TrackMatrix[i] == GL_NONE);
- continue;
- }
-
- /* load the matrix values into sequential registers */
- if (ctx->VertexProgram.TrackMatrixTransform[i] == GL_IDENTITY_NV) {
- load_matrix(ctx->VertexProgram.Parameters, i*4, mat->m);
- }
- else if (ctx->VertexProgram.TrackMatrixTransform[i] == GL_INVERSE_NV) {
- _math_matrix_analyse(mat); /* update the inverse */
- ASSERT(!_math_matrix_is_dirty(mat));
- load_matrix(ctx->VertexProgram.Parameters, i*4, mat->inv);
- }
- else if (ctx->VertexProgram.TrackMatrixTransform[i] == GL_TRANSPOSE_NV) {
- load_transpose_matrix(ctx->VertexProgram.Parameters, i*4, mat->m);
- }
- else {
- assert(ctx->VertexProgram.TrackMatrixTransform[i]
- == GL_INVERSE_TRANSPOSE_NV);
- _math_matrix_analyse(mat); /* update the inverse */
- ASSERT(!_math_matrix_is_dirty(mat));
- load_transpose_matrix(ctx->VertexProgram.Parameters, i*4, mat->inv);
- }
- }
- }
- else {
- /* ARB vertex program */
- if (ctx->VertexProgram.Current->Base.Parameters) {
- /* Grab the state GL state and put into registers */
- _mesa_load_state_parameters(ctx,
- ctx->VertexProgram.Current->Base.Parameters);
- }
- }
-}
-
-
-
-/**
- * For debugging. Dump the current vertex program machine registers.
- */
-void
-_mesa_dump_vp_state( const struct gl_vertex_program_state *state,
- const struct vp_machine *machine)
-{
- int i;
- _mesa_printf("VertexIn:\n");
- for (i = 0; i < MAX_NV_VERTEX_PROGRAM_INPUTS; i++) {
- _mesa_printf("%d: %f %f %f %f ", i,
- machine->Inputs[i][0],
- machine->Inputs[i][1],
- machine->Inputs[i][2],
- machine->Inputs[i][3]);
- }
- _mesa_printf("\n");
-
- _mesa_printf("VertexOut:\n");
- for (i = 0; i < MAX_NV_VERTEX_PROGRAM_OUTPUTS; i++) {
- _mesa_printf("%d: %f %f %f %f ", i,
- machine->Outputs[i][0],
- machine->Outputs[i][1],
- machine->Outputs[i][2],
- machine->Outputs[i][3]);
- }
- _mesa_printf("\n");
-
- _mesa_printf("Registers:\n");
- for (i = 0; i < MAX_PROGRAM_TEMPS; i++) {
- _mesa_printf("%d: %f %f %f %f ", i,
- machine->Temporaries[i][0],
- machine->Temporaries[i][1],
- machine->Temporaries[i][2],
- machine->Temporaries[i][3]);
- }
- _mesa_printf("\n");
-
- _mesa_printf("Parameters:\n");
- for (i = 0; i < MAX_NV_VERTEX_PROGRAM_PARAMS; i++) {
- _mesa_printf("%d: %f %f %f %f ", i,
- state->Parameters[i][0],
- state->Parameters[i][1],
- state->Parameters[i][2],
- state->Parameters[i][3]);
- }
- _mesa_printf("\n");
-}
-
-
-
-/**
- * Return a pointer to the 4-element float vector specified by the given
- * source register.
- */
-static INLINE const GLfloat *
-get_register_pointer( GLcontext *ctx,
- const struct prog_src_register *source,
- struct vp_machine *machine,
- const struct gl_vertex_program *program )
-{
- if (source->RelAddr) {
- const GLint reg = source->Index + machine->AddressReg[0][0];
- ASSERT(source->File == PROGRAM_ENV_PARAM ||
- source->File == PROGRAM_STATE_VAR ||
- source->File == PROGRAM_LOCAL_PARAM);
- if (reg < 0 || reg > MAX_NV_VERTEX_PROGRAM_PARAMS)
- return ZeroVec;
- else if (source->File == PROGRAM_ENV_PARAM)
- return ctx->VertexProgram.Parameters[reg];
- else {
- ASSERT(source->File == PROGRAM_LOCAL_PARAM ||
- source->File == PROGRAM_STATE_VAR);
- return program->Base.Parameters->ParameterValues[reg];
- }
- }
- else {
- switch (source->File) {
- case PROGRAM_TEMPORARY:
- ASSERT(source->Index < MAX_PROGRAM_TEMPS);
- return machine->Temporaries[source->Index];
- case PROGRAM_INPUT:
- ASSERT(source->Index < VERT_ATTRIB_MAX);
- return machine->Inputs[source->Index];
- case PROGRAM_OUTPUT:
- /* This is only needed for the PRINT instruction */
- ASSERT(source->Index < VERT_RESULT_MAX);
- return machine->Outputs[source->Index];
- case PROGRAM_LOCAL_PARAM:
- ASSERT(source->Index < MAX_PROGRAM_LOCAL_PARAMS);
- return program->Base.LocalParams[source->Index];
- case PROGRAM_ENV_PARAM:
- ASSERT(source->Index < MAX_NV_VERTEX_PROGRAM_PARAMS);
- return ctx->VertexProgram.Parameters[source->Index];
- case PROGRAM_STATE_VAR:
- /* Fallthrough */
- case PROGRAM_CONSTANT:
- /* Fallthrough */
- case PROGRAM_UNIFORM:
- /* Fallthrough */
- case PROGRAM_NAMED_PARAM:
- ASSERT(source->Index < program->Base.Parameters->NumParameters);
- return program->Base.Parameters->ParameterValues[source->Index];
- default:
- _mesa_problem(NULL,
- "Bad source register file in get_register_pointer");
- return NULL;
- }
- }
- return NULL;
-}
-
-
-/**
- * Fetch a 4-element float vector from the given source register.
- * Apply swizzling and negating as needed.
- */
-static INLINE void
-fetch_vector4( GLcontext *ctx,
- const struct prog_src_register *source,
- struct vp_machine *machine,
- const struct gl_vertex_program *program,
- GLfloat result[4] )
-{
- const GLfloat *src = get_register_pointer(ctx, source, machine, program);
- ASSERT(src);
- 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->NegateBase) {
- result[0] = -result[0];
- result[1] = -result[1];
- result[2] = -result[2];
- result[3] = -result[3];
- }
-}
-
-
-
-/**
- * As above, but only return result[0] element.
- */
-static INLINE void
-fetch_vector1( GLcontext *ctx,
- const struct prog_src_register *source,
- struct vp_machine *machine,
- const struct gl_vertex_program *program,
- GLfloat result[4] )
-{
- const GLfloat *src = get_register_pointer(ctx, source, machine, program);
- ASSERT(src);
- result[0] = src[GET_SWZ(source->Swizzle, 0)];
- if (source->NegateBase) {
- result[0] = -result[0];
- }
-}
-
-
-/**
- * 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 vp_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.
- */
-static void
-store_vector4( const struct prog_instruction *inst,
- struct vp_machine *machine,
- const GLfloat value[4] )
-{
- const struct prog_dst_register *dest = &(inst->DstReg);
- GLuint writeMask = dest->WriteMask;
- GLfloat *dst;
-
- switch (dest->File) {
- case PROGRAM_OUTPUT:
- ASSERT(dest->Index < VERT_RESULT_MAX);
- dst = machine->Outputs[dest->Index];
- break;
- case PROGRAM_TEMPORARY:
- ASSERT(dest->Index < MAX_PROGRAM_TEMPS);
- dst = machine->Temporaries[dest->Index];
- break;
- case PROGRAM_ENV_PARAM:
- /* Only for VP state programs */
- {
- /* a slight hack */
- GET_CURRENT_CONTEXT(ctx);
- ASSERT(dest->Index < MAX_PROGRAM_ENV_PARAMS);
- dst = ctx->VertexProgram.Parameters[dest->Index];
- }
- break;
- default:
- _mesa_problem(NULL, "Invalid register file in store_vector4(file=%d)",
- dest->File);
- return;
- }
-
- if (dest->WriteMask & WRITEMASK_X)
- dst[0] = value[0];
- if (dest->WriteMask & WRITEMASK_Y)
- dst[1] = value[1];
- if (dest->WriteMask & WRITEMASK_Z)
- dst[2] = value[2];
- if (dest->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]);
- }
-}
-
-
-/**
- * Set x to positive or negative infinity.
- */
-#if defined(USE_IEEE) || defined(_WIN32)
-#define SET_POS_INFINITY(x) ( *((GLuint *) (void *)&x) = 0x7F800000 )
-#define SET_NEG_INFINITY(x) ( *((GLuint *) (void *)&x) = 0xFF800000 )
-#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
-
-
-/**
- * Execute the given vertex program
- */
-void
-_mesa_exec_vertex_program(GLcontext *ctx,
- struct vp_machine *machine,
- const struct gl_vertex_program *program)
-{
- const GLuint maxInst = program->Base.NumInstructions;
- GLuint pc;
-
- ctx->_CurrentProgram = GL_VERTEX_PROGRAM_ARB; /* or NV, doesn't matter */
-
- /* If the program is position invariant, multiply the input position
- * by the MVP matrix and store in the vertex position result register.
- */
- if (ctx->VertexProgram.Current->IsPositionInvariant) {
- TRANSFORM_POINT( machine->Outputs[VERT_RESULT_HPOS],
- ctx->_ModelProjectMatrix.m,
- machine->Inputs[VERT_ATTRIB_POS]);
-
- /* XXX: This could go elsewhere */
- ctx->VertexProgram.Current->Base.OutputsWritten |= VERT_BIT_POS;
- }
-
- for (pc = 0; pc < maxInst; pc++) {
- const struct prog_instruction *inst = program->Base.Instructions + pc;
-
- if (ctx->VertexProgram.CallbackEnabled &&
- ctx->VertexProgram.Callback) {
- ctx->VertexProgram.CurrentPosition = inst->StringPos;
- ctx->VertexProgram.Callback(program->Base.Target,
- ctx->VertexProgram.CallbackData);
- }
-
- switch (inst->Opcode) {
- case OPCODE_ABS: /* GL_NV_vertex_program1_1 */
- {
- GLfloat t[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- if (t[0] < 0.0) t[0] = -t[0];
- if (t[1] < 0.0) t[1] = -t[1];
- if (t[2] < 0.0) t[2] = -t[2];
- if (t[3] < 0.0) t[3] = -t[3];
- store_vector4( inst, machine, t );
- }
- break;
- case OPCODE_ADD:
- {
- GLfloat t[4], u[4], sum[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- fetch_vector4( ctx, &inst->SrcReg[1], machine, program, u );
- sum[0] = t[0] + u[0];
- sum[1] = t[1] + u[1];
- sum[2] = t[2] + u[2];
- sum[3] = t[3] + u[3];
- store_vector4( inst, machine, sum );
- }
- break;
- case OPCODE_ARA:
- break;
- case OPCODE_ARL:
- {
- GLfloat t[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- machine->AddressReg[0][0] = (GLint) FLOORF(t[0]);
- }
- break;
- case OPCODE_ARL_NV:
- break;
- case OPCODE_ARR:
- break;
- case OPCODE_BGNLOOP:
- /* no-op */
- break;
- case OPCODE_ENDLOOP:
- /* subtract 1 here since pc is incremented by for(pc) loop */
- pc = inst->BranchTarget - 1; /* go to matching BNGLOOP */
- break;
- case OPCODE_BRA: /* branch (conditional) */
- /* fall-through */
- case OPCODE_BRK: /* break out of loop (conditional) */
- /* fall-through */
- case OPCODE_CONT: /* continue loop (conditional) */
- if (eval_condition(machine, inst)) {
- /* take branch */
- /* 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; /* abort execution */
- }
- machine->CallStack[machine->StackDepth++] = pc + 1;
- pc = inst->BranchTarget; /* XXX - 1 ??? */
- }
- break;
- case OPCODE_CMP:
- {
- GLfloat a[4], b[4], c[4], result[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
- fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b );
- fetch_vector4( ctx, &inst->SrcReg[2], machine, program, 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 );
- }
- break;
- case OPCODE_COS:
- {
- GLfloat a[4], result[4];
- fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a );
- result[0] = result[1] = result[2] = result[3]
- = (GLfloat) _mesa_cos(a[0]);
- store_vector4( inst, machine, result );
- }
- break;
- case OPCODE_DDX:
- /* fallthrough */
- case OPCODE_DDY:
- _mesa_problem(ctx, "DDX/DDY not allowed in vertex programs");
- break;
-
- case OPCODE_DP3:
- {
- GLfloat t[4], u[4], dot[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- fetch_vector4( ctx, &inst->SrcReg[1], machine, program, u );
- dot[0] = t[0] * u[0] + t[1] * u[1] + t[2] * u[2];
- dot[1] = dot[2] = dot[3] = dot[0];
- store_vector4( inst, machine, dot );
- }
- break;
- case OPCODE_DP4:
- {
- GLfloat t[4], u[4], dot[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- fetch_vector4( ctx, &inst->SrcReg[1], machine, program, u );
- dot[0] = t[0] * u[0] + t[1] * u[1] + t[2] * u[2] + t[3] * u[3];
- dot[1] = dot[2] = dot[3] = dot[0];
- store_vector4( inst, machine, dot );
- }
- break;
- case OPCODE_DPH:
- {
- GLfloat t[4], u[4], dot[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- fetch_vector4( ctx, &inst->SrcReg[1], machine, program, u );
- dot[0] = t[0] * u[0] + t[1] * u[1] + t[2] * u[2] + u[3];
- dot[1] = dot[2] = dot[3] = dot[0];
- store_vector4( inst, machine, dot );
- }
- break;
- case OPCODE_DST:
- {
- GLfloat t[4], u[4], dst[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- fetch_vector4( ctx, &inst->SrcReg[1], machine, program, u );
- dst[0] = 1.0F;
- dst[1] = t[1] * u[1];
- dst[2] = t[2];
- dst[3] = u[3];
- store_vector4( inst, machine, dst );
- }
- break;
- case OPCODE_EXP:
- {
- GLfloat t[4], q[4], floor_t0;
- fetch_vector1( ctx, &inst->SrcReg[0], machine, program, 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 {
-#ifdef USE_IEEE
- GLint ii = (GLint) floor_t0;
- ii = (ii < 23) + 0x3f800000;
- SET_FLOAT_BITS(q[0], ii);
- q[0] = *((GLfloat *) (void *)&ii);
-#else
- q[0] = (GLfloat) pow(2.0, floor_t0);
-#endif
- q[2] = (GLfloat) (q[0] * LOG2(q[1]));
- }
- q[1] = t[0] - floor_t0;
- q[3] = 1.0F;
- store_vector4( inst, machine, q );
- }
- break;
- case OPCODE_EX2: /* GL_ARB_vertex_program */
- {
- GLfloat t[4];
- fetch_vector1( ctx, &inst->SrcReg[0], machine, program, t );
- t[0] = t[1] = t[2] = t[3] = (GLfloat)_mesa_pow(2.0, t[0]);
- store_vector4( inst, machine, t );
- }
- break;
- case OPCODE_FLR: /* GL_ARB_vertex_program */
- {
- GLfloat t[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- t[0] = FLOORF(t[0]);
- t[1] = FLOORF(t[1]);
- t[2] = FLOORF(t[2]);
- t[3] = FLOORF(t[3]);
- store_vector4( inst, machine, t );
- }
- break;
- case OPCODE_FRC: /* GL_ARB_vertex_program */
- {
- GLfloat t[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- t[0] = t[0] - FLOORF(t[0]);
- t[1] = t[1] - FLOORF(t[1]);
- t[2] = t[2] - FLOORF(t[2]);
- t[3] = t[3] - FLOORF(t[3]);
- store_vector4( inst, machine, t );
- }
- break;
- case OPCODE_IF:
- if (eval_condition(machine, inst)) {
- /* do if-clause (just continue execution) */
- }
- else {
- /* go to the instruction after ELSE or ENDIF */
- assert(inst->BranchTarget >= 0);
- pc = inst->BranchTarget - 1;
- }
- break;
- case OPCODE_ELSE:
- /* goto ENDIF */
- assert(inst->BranchTarget >= 0);
- pc = inst->BranchTarget - 1;
- break;
- case OPCODE_ENDIF:
- /* nothing */
- break;
- case OPCODE_MOV:
- {
- GLfloat t[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- store_vector4( inst, machine, t );
- }
- break;
- case OPCODE_LIT:
- {
- const GLfloat epsilon = 1.0F / 256.0F; /* per NV spec */
- GLfloat t[4], lit[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- t[0] = MAX2(t[0], 0.0F);
- t[1] = MAX2(t[1], 0.0F);
- t[3] = CLAMP(t[3], -(128.0F - epsilon), (128.0F - epsilon));
- lit[0] = 1.0;
- lit[1] = t[0];
- lit[2] = (t[0] > 0.0) ? (GLfloat) _mesa_pow(t[1], t[3]) : 0.0F;
- lit[3] = 1.0;
- store_vector4( inst, machine, lit );
- }
- break;
- case OPCODE_LOG:
- {
- GLfloat t[4], q[4], abs_t0;
- fetch_vector1( ctx, &inst->SrcReg[0], machine, program, 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) */
- q[2] = (GLfloat) (q[0] + LOG2(q[1]));
- }
- }
- 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_MAD:
- {
- GLfloat t[4], u[4], v[4], sum[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- fetch_vector4( ctx, &inst->SrcReg[1], machine, program, u );
- fetch_vector4( ctx, &inst->SrcReg[2], machine, program, v );
- sum[0] = t[0] * u[0] + v[0];
- sum[1] = t[1] * u[1] + v[1];
- sum[2] = t[2] * u[2] + v[2];
- sum[3] = t[3] * u[3] + v[3];
- store_vector4( inst, machine, sum );
- }
- break;
- case OPCODE_MAX:
- {
- GLfloat t[4], u[4], max[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- fetch_vector4( ctx, &inst->SrcReg[1], machine, program, u );
- max[0] = (t[0] > u[0]) ? t[0] : u[0];
- max[1] = (t[1] > u[1]) ? t[1] : u[1];
- max[2] = (t[2] > u[2]) ? t[2] : u[2];
- max[3] = (t[3] > u[3]) ? t[3] : u[3];
- store_vector4( inst, machine, max );
- }
- break;
- case OPCODE_MIN:
- {
- GLfloat t[4], u[4], min[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- fetch_vector4( ctx, &inst->SrcReg[1], machine, program, u );
- min[0] = (t[0] < u[0]) ? t[0] : u[0];
- min[1] = (t[1] < u[1]) ? t[1] : u[1];
- min[2] = (t[2] < u[2]) ? t[2] : u[2];
- min[3] = (t[3] < u[3]) ? t[3] : u[3];
- store_vector4( inst, machine, min );
- }
- break;
- case OPCODE_MUL:
- {
- GLfloat t[4], u[4], prod[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- fetch_vector4( ctx, &inst->SrcReg[1], machine, program, u );
- prod[0] = t[0] * u[0];
- prod[1] = t[1] * u[1];
- prod[2] = t[2] * u[2];
- prod[3] = t[3] * u[3];
- store_vector4( inst, machine, prod );
- }
- break;
- case OPCODE_RCP:
- {
- GLfloat t[4];
- fetch_vector1( ctx, &inst->SrcReg[0], machine, program, t );
- if (t[0] != 1.0F)
- t[0] = 1.0F / t[0]; /* div by zero is infinity! */
- t[1] = t[2] = t[3] = t[0];
- store_vector4( inst, machine, t );
- }
- break;
- case OPCODE_RSQ:
- {
- GLfloat t[4];
- fetch_vector1( ctx, &inst->SrcReg[0], machine, program, t );
- t[0] = INV_SQRTF(FABSF(t[0]));
- t[1] = t[2] = t[3] = t[0];
- store_vector4( inst, machine, t );
- }
- break;
- case OPCODE_SLT:
- {
- GLfloat t[4], u[4], slt[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- fetch_vector4( ctx, &inst->SrcReg[1], machine, program, u );
- slt[0] = (t[0] < u[0]) ? 1.0F : 0.0F;
- slt[1] = (t[1] < u[1]) ? 1.0F : 0.0F;
- slt[2] = (t[2] < u[2]) ? 1.0F : 0.0F;
- slt[3] = (t[3] < u[3]) ? 1.0F : 0.0F;
- store_vector4( inst, machine, slt );
- }
- break;
- case OPCODE_SGE:
- {
- GLfloat t[4], u[4], sge[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- fetch_vector4( ctx, &inst->SrcReg[1], machine, program, u );
- sge[0] = (t[0] >= u[0]) ? 1.0F : 0.0F;
- sge[1] = (t[1] >= u[1]) ? 1.0F : 0.0F;
- sge[2] = (t[2] >= u[2]) ? 1.0F : 0.0F;
- sge[3] = (t[3] >= u[3]) ? 1.0F : 0.0F;
- store_vector4( inst, machine, sge );
- }
- break;
- case OPCODE_SGT: /* set on greater */
- {
- GLfloat a[4], b[4], result[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a );
- fetch_vector4( ctx, &inst->SrcReg[1], machine, program, 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_VERT) {
- printf("SGT %g %g %g %g\n",
- result[0], result[1], result[2], result[3]);
- }
- }
- break;
- case OPCODE_RCC:
- {
- GLfloat t[4], u;
- fetch_vector1( ctx, &inst->SrcReg[0], machine, program, t );
- if (t[0] == 1.0F)
- u = 1.0F;
- else
- u = 1.0F / t[0];
- if (u > 0.0F) {
- if (u > 1.884467e+019F) {
- u = 1.884467e+019F; /* IEEE 32-bit binary value 0x5F800000 */
- }
- else if (u < 5.42101e-020F) {
- u = 5.42101e-020F; /* IEEE 32-bit binary value 0x1F800000 */
- }
- }
- else {
- if (u < -1.884467e+019F) {
- u = -1.884467e+019F; /* IEEE 32-bit binary value 0xDF800000 */
- }
- else if (u > -5.42101e-020F) {
- u = -5.42101e-020F; /* IEEE 32-bit binary value 0x9F800000 */
- }
- }
- t[0] = t[1] = t[2] = t[3] = u;
- store_vector4( inst, machine, t );
- }
- break;
- case OPCODE_SUB: /* GL_NV_vertex_program1_1 */
- {
- GLfloat t[4], u[4], sum[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- fetch_vector4( ctx, &inst->SrcReg[1], machine, program, u );
- sum[0] = t[0] - u[0];
- sum[1] = t[1] - u[1];
- sum[2] = t[2] - u[2];
- sum[3] = t[3] - u[3];
- store_vector4( inst, machine, sum );
- }
- break;
- case OPCODE_LG2: /* GL_ARB_vertex_program */
- {
- GLfloat t[4];
- fetch_vector1( ctx, &inst->SrcReg[0], machine, program, t );
- t[0] = t[1] = t[2] = t[3] = LOG2(t[0]);
- store_vector4( inst, machine, t );
- }
- break;
- case OPCODE_POW: /* GL_ARB_vertex_program */
- {
- GLfloat t[4], u[4];
- fetch_vector1( ctx, &inst->SrcReg[0], machine, program, t );
- fetch_vector1( ctx, &inst->SrcReg[1], machine, program, u );
- t[0] = t[1] = t[2] = t[3] = (GLfloat)_mesa_pow(t[0], u[0]);
- store_vector4( inst, machine, t );
- }
- break;
- case OPCODE_XPD: /* GL_ARB_vertex_program */
- {
- GLfloat t[4], u[4], cross[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- fetch_vector4( ctx, &inst->SrcReg[1], machine, program, u );
- cross[0] = t[1] * u[2] - t[2] * u[1];
- cross[1] = t[2] * u[0] - t[0] * u[2];
- cross[2] = t[0] * u[1] - t[1] * u[0];
- cross[3] = 0.0;
- store_vector4( inst, machine, cross );
- }
- break;
- case OPCODE_SWZ: /* GL_ARB_vertex_program */
- {
- const struct prog_src_register *source = &inst->SrcReg[0];
- const GLfloat *src = get_register_pointer(ctx, source,
- machine, program);
- GLfloat result[4];
- GLuint i;
-
- /* do extended swizzling here */
- 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->NegateBase & (1 << i))
- result[i] = -result[i];
- }
- store_vector4( inst, machine, result );
- }
- break;
- case OPCODE_PRINT:
- if (inst->SrcReg[0].File) {
- GLfloat t[4];
- fetch_vector4( ctx, &inst->SrcReg[0], machine, program, t );
- _mesa_printf("%s%g, %g, %g, %g\n",
- (char *) inst->Data, t[0], t[1], t[2], t[3]);
- }
- else {
- _mesa_printf("%s\n", (char *) inst->Data);
- }
- break;
- case OPCODE_END:
- ctx->_CurrentProgram = 0;
- return;
- case OPCODE_NOP:
- break;
- default:
- /* bad instruction opcode */
- _mesa_problem(ctx, "Bad VP Opcode in _mesa_exec_vertex_program");
- ctx->_CurrentProgram = 0;
- return;
- } /* switch */
- } /* for */
-
- ctx->_CurrentProgram = 0;
-}
-
-
-/**
- * Execute a vertex state program.
- * \sa _mesa_ExecuteProgramNV
- */
-void
-_mesa_exec_vertex_state_program(GLcontext *ctx,
- struct gl_vertex_program *vprog,
- const GLfloat *params)
-{
- struct vp_machine machine;
- _mesa_init_vp_per_vertex_registers(ctx, &machine);
- _mesa_init_vp_per_primitive_registers(ctx);
- COPY_4V(machine.Inputs[VERT_ATTRIB_POS], params);
- _mesa_exec_vertex_program(ctx, &machine, vprog);
-}
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