From 865f88afc0d59d886fb2ad50429e584ecf17fa81 Mon Sep 17 00:00:00 2001 From: Brian Date: Thu, 14 Dec 2006 15:14:14 -0700 Subject: Renamed from s_nvfragprog.[ch] --- src/mesa/swrast/s_fragprog.c | 1692 ++++++++++++++++++++++++++++++++++++++++++ src/mesa/swrast/s_fragprog.h | 37 + 2 files changed, 1729 insertions(+) create mode 100644 src/mesa/swrast/s_fragprog.c create mode 100644 src/mesa/swrast/s_fragprog.h (limited to 'src') diff --git a/src/mesa/swrast/s_fragprog.c b/src/mesa/swrast/s_fragprog.c new file mode 100644 index 0000000000..ac2f5d93b6 --- /dev/null +++ b/src/mesa/swrast/s_fragprog.c @@ -0,0 +1,1692 @@ +/* + * 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. + */ + +/* + * Regarding GL_NV_fragment_program: + * + * Portions of this software may use or implement intellectual + * property owned and licensed by NVIDIA Corporation. NVIDIA disclaims + * any and all warranties with respect to such intellectual property, + * including any use thereof or modifications thereto. + */ + +#include "glheader.h" +#include "colormac.h" +#include "context.h" +#include "prog_instruction.h" +#include "prog_parameter.h" +#include "prog_print.h" +#include "program.h" + +#include "s_nvfragprog.h" +#include "s_span.h" + + +/* See comments below for info about this */ +#define LAMBDA_ZERO 1 + +/* debug predicate */ +#define DEBUG_FRAG 0 + + +/** + * Virtual machine state used during execution of a fragment programs. + */ +struct fp_machine +{ + GLfloat Temporaries[MAX_PROGRAM_TEMPS][4]; + GLfloat Inputs[FRAG_ATTRIB_MAX][4]; + GLfloat Outputs[FRAG_RESULT_MAX][4]; + GLuint CondCodes[4]; /**< COND_* value for x/y/z/w */ + + GLuint CallStack[MAX_PROGRAM_CALL_DEPTH]; /**< For CAL/RET instructions */ + GLuint StackDepth; /**< Index/ptr to top of CallStack[] */ +}; + + +#if FEATURE_MESA_program_debug +static struct fp_machine *CurrentMachine = NULL; + +/** + * For GL_MESA_program_debug. + * Return current value (4*GLfloat) of a fragment program register. + * Called via ctx->Driver.GetFragmentProgramRegister(). + */ +void +_swrast_get_program_register(GLcontext *ctx, enum register_file file, + GLuint index, GLfloat val[4]) +{ + if (CurrentMachine) { + switch (file) { + case PROGRAM_INPUT: + COPY_4V(val, CurrentMachine->Inputs[index]); + break; + case PROGRAM_OUTPUT: + COPY_4V(val, CurrentMachine->Outputs[index]); + break; + case PROGRAM_TEMPORARY: + COPY_4V(val, CurrentMachine->Temporaries[index]); + break; + default: + _mesa_problem(NULL, + "bad register file in _swrast_get_program_register"); + } + } +} +#endif /* FEATURE_MESA_program_debug */ + + +/** + * Fetch a texel. + */ +static void +fetch_texel( GLcontext *ctx, const GLfloat texcoord[4], GLfloat lambda, + GLuint unit, GLfloat color[4] ) +{ + GLchan rgba[4]; + SWcontext *swrast = SWRAST_CONTEXT(ctx); + + /* XXX use a float-valued TextureSample routine here!!! */ + swrast->TextureSample[unit](ctx, ctx->Texture.Unit[unit]._Current, + 1, (const GLfloat (*)[4]) texcoord, + &lambda, &rgba); + color[0] = CHAN_TO_FLOAT(rgba[0]); + color[1] = CHAN_TO_FLOAT(rgba[1]); + color[2] = CHAN_TO_FLOAT(rgba[2]); + color[3] = CHAN_TO_FLOAT(rgba[3]); +} + + +/** + * Fetch a texel with the given partial derivatives to compute a level + * of detail in the mipmap. + */ +static void +fetch_texel_deriv( GLcontext *ctx, const GLfloat texcoord[4], + const GLfloat texdx[4], const GLfloat texdy[4], + GLuint unit, GLfloat color[4] ) +{ + SWcontext *swrast = SWRAST_CONTEXT(ctx); + const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current; + const struct gl_texture_image *texImg = texObj->Image[0][texObj->BaseLevel]; + const GLfloat texW = (GLfloat) texImg->WidthScale; + const GLfloat texH = (GLfloat) texImg->HeightScale; + GLchan rgba[4]; + + GLfloat lambda = _swrast_compute_lambda(texdx[0], texdy[0], /* ds/dx, ds/dy */ + texdx[1], texdy[1], /* dt/dx, dt/dy */ + texdx[3], texdy[2], /* dq/dx, dq/dy */ + texW, texH, + texcoord[0], texcoord[1], texcoord[3], + 1.0F / texcoord[3]); + + swrast->TextureSample[unit](ctx, ctx->Texture.Unit[unit]._Current, + 1, (const GLfloat (*)[4]) texcoord, + &lambda, &rgba); + color[0] = CHAN_TO_FLOAT(rgba[0]); + color[1] = CHAN_TO_FLOAT(rgba[1]); + color[2] = CHAN_TO_FLOAT(rgba[2]); + color[3] = CHAN_TO_FLOAT(rgba[3]); +} + + +/** + * 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, + const struct fp_machine *machine, + const struct gl_fragment_program *program ) +{ + switch (source->File) { + case PROGRAM_TEMPORARY: + ASSERT(source->Index < MAX_PROGRAM_TEMPS); + return machine->Temporaries[source->Index]; + case PROGRAM_INPUT: + ASSERT(source->Index < FRAG_ATTRIB_MAX); + return machine->Inputs[source->Index]; + case PROGRAM_OUTPUT: + /* This is only for PRINT */ + ASSERT(source->Index < FRAG_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_FRAGMENT_PROGRAM_PARAMS); + return ctx->FragmentProgram.Parameters[source->Index]; + case PROGRAM_STATE_VAR: + /* Fallthrough */ + case PROGRAM_CONSTANT: + /* Fallthrough */ + case PROGRAM_UNIFORM: + /* Fallthrough */ + case PROGRAM_NAMED_PARAM: + ASSERT(source->Index < (GLint) program->Base.Parameters->NumParameters); + return program->Base.Parameters->ParameterValues[source->Index]; + default: + _mesa_problem(ctx, "Invalid input register file %d in fp " + "get_register_pointer", source->File); + return NULL; + } +} + + +/** + * Fetch a 4-element float vector from the given source register. + * Apply swizzling and negating as needed. + */ +static void +fetch_vector4( GLcontext *ctx, + const struct prog_src_register *source, + const struct fp_machine *machine, + const struct gl_fragment_program *program, + GLfloat result[4] ) +{ + const GLfloat *src = get_register_pointer(ctx, source, machine, program); + ASSERT(src); + + if (source->Swizzle == MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, + SWIZZLE_Z, SWIZZLE_W)) { + /* no swizzling */ + COPY_4V(result, src); + } + else { + 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]; + } + 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->NegateAbs) { + result[0] = -result[0]; + result[1] = -result[1]; + result[2] = -result[2]; + result[3] = -result[3]; + } +} + + +/** + * Fetch the derivative with respect to X for the given register. + * \return GL_TRUE if it was easily computed or GL_FALSE if we + * need to execute another instance of the program (ugh)! + */ +static GLboolean +fetch_vector4_deriv( GLcontext *ctx, + const struct prog_src_register *source, + const SWspan *span, + char xOrY, GLint column, GLfloat result[4] ) +{ + GLfloat src[4]; + + ASSERT(xOrY == 'X' || xOrY == 'Y'); + + switch (source->Index) { + case FRAG_ATTRIB_WPOS: + if (xOrY == 'X') { + src[0] = 1.0; + src[1] = 0.0; + src[2] = span->dzdx / ctx->DrawBuffer->_DepthMaxF; + src[3] = span->dwdx; + } + else { + src[0] = 0.0; + src[1] = 1.0; + src[2] = span->dzdy / ctx->DrawBuffer->_DepthMaxF; + src[3] = span->dwdy; + } + break; + case FRAG_ATTRIB_COL0: + if (xOrY == 'X') { + src[0] = span->drdx * (1.0F / CHAN_MAXF); + src[1] = span->dgdx * (1.0F / CHAN_MAXF); + src[2] = span->dbdx * (1.0F / CHAN_MAXF); + src[3] = span->dadx * (1.0F / CHAN_MAXF); + } + else { + src[0] = span->drdy * (1.0F / CHAN_MAXF); + src[1] = span->dgdy * (1.0F / CHAN_MAXF); + src[2] = span->dbdy * (1.0F / CHAN_MAXF); + src[3] = span->dady * (1.0F / CHAN_MAXF); + } + break; + case FRAG_ATTRIB_COL1: + if (xOrY == 'X') { + src[0] = span->dsrdx * (1.0F / CHAN_MAXF); + src[1] = span->dsgdx * (1.0F / CHAN_MAXF); + src[2] = span->dsbdx * (1.0F / CHAN_MAXF); + src[3] = 0.0; /* XXX need this */ + } + else { + src[0] = span->dsrdy * (1.0F / CHAN_MAXF); + src[1] = span->dsgdy * (1.0F / CHAN_MAXF); + src[2] = span->dsbdy * (1.0F / CHAN_MAXF); + src[3] = 0.0; /* XXX need this */ + } + break; + case FRAG_ATTRIB_FOGC: + if (xOrY == 'X') { + src[0] = span->dfogdx; + src[1] = 0.0; + src[2] = 0.0; + src[3] = 0.0; + } + else { + src[0] = span->dfogdy; + src[1] = 0.0; + src[2] = 0.0; + src[3] = 0.0; + } + break; + case FRAG_ATTRIB_TEX0: + case FRAG_ATTRIB_TEX1: + case FRAG_ATTRIB_TEX2: + case FRAG_ATTRIB_TEX3: + case FRAG_ATTRIB_TEX4: + case FRAG_ATTRIB_TEX5: + case FRAG_ATTRIB_TEX6: + case FRAG_ATTRIB_TEX7: + if (xOrY == 'X') { + const GLuint u = source->Index - FRAG_ATTRIB_TEX0; + /* this is a little tricky - I think I've got it right */ + const GLfloat invQ = 1.0f / (span->tex[u][3] + + span->texStepX[u][3] * column); + src[0] = span->texStepX[u][0] * invQ; + src[1] = span->texStepX[u][1] * invQ; + src[2] = span->texStepX[u][2] * invQ; + src[3] = span->texStepX[u][3] * invQ; + } + else { + const GLuint u = source->Index - FRAG_ATTRIB_TEX0; + /* Tricky, as above, but in Y direction */ + const GLfloat invQ = 1.0f / (span->tex[u][3] + span->texStepY[u][3]); + src[0] = span->texStepY[u][0] * invQ; + src[1] = span->texStepY[u][1] * invQ; + src[2] = span->texStepY[u][2] * invQ; + src[3] = span->texStepY[u][3] * invQ; + } + break; + default: + return GL_FALSE; + } + + 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]; + } + 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->NegateAbs) { + result[0] = -result[0]; + result[1] = -result[1]; + result[2] = -result[2]; + result[3] = -result[3]; + } + return GL_TRUE; +} + + +/** + * As above, but only return result[0] element. + */ +static void +fetch_vector1( GLcontext *ctx, + const struct prog_src_register *source, + const struct fp_machine *machine, + const struct gl_fragment_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]; + } + if (source->Abs) { + result[0] = FABSF(result[0]); + } + if (source->NegateAbs) { + 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; + } +} + + +/** + * 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 fp_machine *machine, + const GLfloat value[4] ) +{ + const struct prog_dst_register *dest = &(inst->DstReg); + const GLboolean clamp = inst->SaturateMode == SATURATE_ZERO_ONE; + GLfloat *dstReg; + GLfloat dummyReg[4]; + GLfloat clampedValue[4]; + GLuint writeMask = dest->WriteMask; + + switch (dest->File) { + case PROGRAM_OUTPUT: + dstReg = machine->Outputs[dest->Index]; + break; + case PROGRAM_TEMPORARY: + dstReg = machine->Temporaries[dest->Index]; + break; + case PROGRAM_WRITE_ONLY: + dstReg = dummyReg; + return; + default: + _mesa_problem(NULL, "bad register file in store_vector4(fp)"); + return; + } + +#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 (dest->CondMask != COND_TR) { + /* condition codes may turn off some writes */ + if (writeMask & WRITEMASK_X) { + if (!test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 0)], + dest->CondMask)) + writeMask &= ~WRITEMASK_X; + } + if (writeMask & WRITEMASK_Y) { + if (!test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 1)], + dest->CondMask)) + writeMask &= ~WRITEMASK_Y; + } + if (writeMask & WRITEMASK_Z) { + if (!test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 2)], + dest->CondMask)) + writeMask &= ~WRITEMASK_Z; + } + if (writeMask & WRITEMASK_W) { + if (!test_cc(machine->CondCodes[GET_SWZ(dest->CondSwizzle, 3)], + dest->CondMask)) + writeMask &= ~WRITEMASK_W; + } + } + + if (writeMask & WRITEMASK_X) + dstReg[0] = value[0]; + if (writeMask & WRITEMASK_Y) + dstReg[1] = value[1]; + if (writeMask & WRITEMASK_Z) + dstReg[2] = value[2]; + if (writeMask & WRITEMASK_W) + dstReg[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]); + } +} + + +/** + * Initialize a new machine state instance from an existing one, adding + * the partial derivatives onto the input registers. + * Used to implement DDX and DDY instructions in non-trivial cases. + */ +static void +init_machine_deriv( GLcontext *ctx, + const struct fp_machine *machine, + const struct gl_fragment_program *program, + const SWspan *span, char xOrY, + struct fp_machine *dMachine ) +{ + GLuint u, v; + + ASSERT(xOrY == 'X' || xOrY == 'Y'); + + /* copy existing machine */ + _mesa_memcpy(dMachine, machine, sizeof(struct fp_machine)); + + if (program->Base.Target == GL_FRAGMENT_PROGRAM_NV) { + /* Clear temporary registers (undefined for ARB_f_p) */ + _mesa_bzero( (void*) machine->Temporaries, + MAX_NV_FRAGMENT_PROGRAM_TEMPS * 4 * sizeof(GLfloat)); + } + + /* Add derivatives */ + if (program->Base.InputsRead & (1 << FRAG_ATTRIB_WPOS)) { + GLfloat *wpos = (GLfloat*) machine->Inputs[FRAG_ATTRIB_WPOS]; + if (xOrY == 'X') { + wpos[0] += 1.0F; + wpos[1] += 0.0F; + wpos[2] += span->dzdx; + wpos[3] += span->dwdx; + } + else { + wpos[0] += 0.0F; + wpos[1] += 1.0F; + wpos[2] += span->dzdy; + wpos[3] += span->dwdy; + } + } + if (program->Base.InputsRead & (1 << FRAG_ATTRIB_COL0)) { + GLfloat *col0 = (GLfloat*) machine->Inputs[FRAG_ATTRIB_COL0]; + if (xOrY == 'X') { + col0[0] += span->drdx * (1.0F / CHAN_MAXF); + col0[1] += span->dgdx * (1.0F / CHAN_MAXF); + col0[2] += span->dbdx * (1.0F / CHAN_MAXF); + col0[3] += span->dadx * (1.0F / CHAN_MAXF); + } + else { + col0[0] += span->drdy * (1.0F / CHAN_MAXF); + col0[1] += span->dgdy * (1.0F / CHAN_MAXF); + col0[2] += span->dbdy * (1.0F / CHAN_MAXF); + col0[3] += span->dady * (1.0F / CHAN_MAXF); + } + } + if (program->Base.InputsRead & (1 << FRAG_ATTRIB_COL1)) { + GLfloat *col1 = (GLfloat*) machine->Inputs[FRAG_ATTRIB_COL1]; + if (xOrY == 'X') { + col1[0] += span->dsrdx * (1.0F / CHAN_MAXF); + col1[1] += span->dsgdx * (1.0F / CHAN_MAXF); + col1[2] += span->dsbdx * (1.0F / CHAN_MAXF); + col1[3] += 0.0; /*XXX fix */ + } + else { + col1[0] += span->dsrdy * (1.0F / CHAN_MAXF); + col1[1] += span->dsgdy * (1.0F / CHAN_MAXF); + col1[2] += span->dsbdy * (1.0F / CHAN_MAXF); + col1[3] += 0.0; /*XXX fix */ + } + } + if (program->Base.InputsRead & (1 << FRAG_ATTRIB_FOGC)) { + GLfloat *fogc = (GLfloat*) machine->Inputs[FRAG_ATTRIB_FOGC]; + if (xOrY == 'X') { + fogc[0] += span->dfogdx; + } + else { + fogc[0] += span->dfogdy; + } + } + for (u = 0; u < ctx->Const.MaxTextureCoordUnits; u++) { + if (program->Base.InputsRead & (1 << (FRAG_ATTRIB_TEX0 + u))) { + GLfloat *tex = (GLfloat*) machine->Inputs[FRAG_ATTRIB_TEX0 + u]; + /* XXX perspective-correct interpolation */ + if (xOrY == 'X') { + tex[0] += span->texStepX[u][0]; + tex[1] += span->texStepX[u][1]; + tex[2] += span->texStepX[u][2]; + tex[3] += span->texStepX[u][3]; + } + else { + tex[0] += span->texStepY[u][0]; + tex[1] += span->texStepY[u][1]; + tex[2] += span->texStepY[u][2]; + tex[3] += span->texStepY[u][3]; + } + } + } + + for (v = 0; v < ctx->Const.MaxVarying; v++) { + if (program->Base.InputsRead & (1 << (FRAG_ATTRIB_VAR0 + v))) { + GLfloat *var = (GLfloat*) machine->Inputs[FRAG_ATTRIB_VAR0 + v]; + /* XXXX finish this */ + var[0] += span->varStepX[v][0]; + var[1] += span->varStepX[v][1]; + var[2] += span->varStepX[v][2]; + var[3] += span->varStepX[v][3]; + } + } + + /* init condition codes */ + dMachine->CondCodes[0] = COND_EQ; + dMachine->CondCodes[1] = COND_EQ; + dMachine->CondCodes[2] = COND_EQ; + dMachine->CondCodes[3] = COND_EQ; +} + + +/** + * Execute the given vertex program. + * NOTE: we do everything in single-precision floating point; we don't + * currently observe the single/half/fixed-precision qualifiers. + * \param ctx - rendering context + * \param program - the fragment program to execute + * \param machine - machine state (register file) + * \param maxInst - max number of instructions to execute + * \return GL_TRUE if program completed or GL_FALSE if program executed KIL. + */ +static GLboolean +execute_program( GLcontext *ctx, + const struct gl_fragment_program *program, GLuint maxInst, + struct fp_machine *machine, const SWspan *span, + GLuint column ) +{ + GLuint pc; + + if (DEBUG_FRAG) { + printf("execute fragment program --------------------\n"); + } + + for (pc = 0; pc < maxInst; pc++) { + const struct prog_instruction *inst = program->Base.Instructions + pc; + + if (ctx->FragmentProgram.CallbackEnabled && + ctx->FragmentProgram.Callback) { + ctx->FragmentProgram.CurrentPosition = inst->StringPos; + ctx->FragmentProgram.Callback(program->Base.Target, + ctx->FragmentProgram.CallbackData); + } + + if (DEBUG_FRAG) { + _mesa_print_instruction(inst); + } + + switch (inst->Opcode) { + case OPCODE_ABS: + { + GLfloat a[4], result[4]; + fetch_vector4( ctx, &inst->SrcReg[0], machine, program, 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( ctx, &inst->SrcReg[0], machine, program, a ); + fetch_vector4( ctx, &inst->SrcReg[1], machine, program, 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_FRAG) { + 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_BRA: /* conditional branch */ + { + /* NOTE: The return is conditional! */ + 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)) { + /* take branch */ + pc = inst->BranchTarget; + } + } + break; + case OPCODE_CAL: /* Call subroutine */ + { + /* NOTE: The call is conditional! */ + 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)) { + if (machine->StackDepth >= MAX_PROGRAM_CALL_DEPTH) { + return GL_TRUE; /* Per GL_NV_vertex_program2 spec */ + } + machine->CallStack[machine->StackDepth++] = pc + 1; + pc = inst->BranchTarget; + } + } + 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: /* Partial derivative with respect to X */ + { + GLfloat a[4], aNext[4], result[4]; + struct fp_machine dMachine; + if (!fetch_vector4_deriv(ctx, &inst->SrcReg[0], span, 'X', + column, result)) { + /* This is tricky. Make a copy of the current machine state, + * increment the input registers by the dx or dy partial + * derivatives, then re-execute the program up to the + * preceeding instruction, then fetch the source register. + * Finally, find the difference in the register values for + * the original and derivative runs. + */ + fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a); + init_machine_deriv(ctx, machine, program, span, + 'X', &dMachine); + execute_program(ctx, program, pc, &dMachine, span, column); + fetch_vector4( ctx, &inst->SrcReg[0], &dMachine, program, aNext ); + result[0] = aNext[0] - a[0]; + result[1] = aNext[1] - a[1]; + result[2] = aNext[2] - a[2]; + result[3] = aNext[3] - a[3]; + } + store_vector4( inst, machine, result ); + } + break; + case OPCODE_DDY: /* Partial derivative with respect to Y */ + { + GLfloat a[4], aNext[4], result[4]; + struct fp_machine dMachine; + if (!fetch_vector4_deriv(ctx, &inst->SrcReg[0], span, 'Y', + column, result)) { + init_machine_deriv(ctx, machine, program, span, + 'Y', &dMachine); + fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a); + execute_program(ctx, program, pc, &dMachine, span, column); + fetch_vector4( ctx, &inst->SrcReg[0], &dMachine, program, aNext ); + result[0] = aNext[0] - a[0]; + result[1] = aNext[1] - a[1]; + result[2] = aNext[2] - a[2]; + result[3] = aNext[3] - a[3]; + } + store_vector4( inst, machine, result ); + } + break; + case OPCODE_DP3: + { + 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] = result[1] = result[2] = result[3] = DOT3(a, b); + store_vector4( inst, machine, result ); + if (DEBUG_FRAG) { + 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( ctx, &inst->SrcReg[0], machine, program, a ); + fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b ); + result[0] = result[1] = result[2] = result[3] = DOT4(a,b); + store_vector4( inst, machine, result ); + if (DEBUG_FRAG) { + 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( ctx, &inst->SrcReg[0], machine, program, a ); + fetch_vector4( ctx, &inst->SrcReg[1], machine, program, b ); + result[0] = result[1] = result[2] = result[3] = + a[0] * b[0] + a[1] * b[1] + a[2] * b[2] + b[3]; + store_vector4( inst, machine, result ); + } + break; + case OPCODE_DST: /* Distance vector */ + { + 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] = 1.0F; + result[1] = a[1] * b[1]; + result[2] = a[2]; + result[3] = b[3]; + store_vector4( inst, machine, result ); + } + break; + case OPCODE_EX2: /* Exponential base 2 */ + { + GLfloat a[4], result[4]; + fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a ); + result[0] = result[1] = result[2] = result[3] = + (GLfloat) _mesa_pow(2.0, a[0]); + store_vector4( inst, machine, result ); + } + break; + case OPCODE_FLR: + { + GLfloat a[4], result[4]; + fetch_vector4( ctx, &inst->SrcReg[0], machine, program, 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( ctx, &inst->SrcReg[0], machine, program, 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_KIL_NV: /* NV_f_p only */ + { + 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_FALSE; + } + } + break; + case OPCODE_KIL: /* ARB_f_p only */ + { + GLfloat a[4]; + fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a ); + 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]; + fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a ); + result[0] = result[1] = result[2] = result[3] = LOG2(a[0]); + 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( ctx, &inst->SrcReg[0], machine, program, 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] = 1.0; + else + result[2] = EXPF(a[3] * LOGF(a[1])); + } + else { + result[2] = 0.0; + } + result[3] = 1.0F; + store_vector4( inst, machine, result ); + if (DEBUG_FRAG) { + 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_LRP: + { + 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] * 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_FRAG) { + 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( 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] * 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_FRAG) { + 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( ctx, &inst->SrcReg[0], machine, program, a ); + fetch_vector4( ctx, &inst->SrcReg[1], machine, program, 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_FRAG) { + 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( ctx, &inst->SrcReg[0], machine, program, a ); + fetch_vector4( ctx, &inst->SrcReg[1], machine, program, 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( ctx, &inst->SrcReg[0], machine, program, result ); + store_vector4( inst, machine, result ); + if (DEBUG_FRAG) { + 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( ctx, &inst->SrcReg[0], machine, program, a ); + fetch_vector4( ctx, &inst->SrcReg[1], machine, program, 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_FRAG) { + 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_PK2H: /* pack two 16-bit floats in one 32-bit float */ + { + GLfloat a[4], result[4]; + GLhalfNV hx, hy; + GLuint *rawResult = (GLuint *) result; + GLuint twoHalves; + fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a ); + hx = _mesa_float_to_half(a[0]); + hy = _mesa_float_to_half(a[1]); + twoHalves = hx | (hy << 16); + rawResult[0] = rawResult[1] = rawResult[2] = rawResult[3] + = twoHalves; + store_vector4( inst, machine, result ); + } + break; + case OPCODE_PK2US: /* pack two GLushorts into one 32-bit float */ + { + GLfloat a[4], result[4]; + GLuint usx, usy, *rawResult = (GLuint *) result; + fetch_vector4( ctx, &inst->SrcReg[0], machine, program, 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); + rawResult[0] = rawResult[1] = rawResult[2] = rawResult[3] + = usx | (usy << 16); + store_vector4( inst, machine, result ); + } + break; + case OPCODE_PK4B: /* pack four GLbytes into one 32-bit float */ + { + GLfloat a[4], result[4]; + GLuint ubx, uby, ubz, ubw, *rawResult = (GLuint *) result; + fetch_vector4( ctx, &inst->SrcReg[0], machine, program, 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); + rawResult[0] = rawResult[1] = rawResult[2] = rawResult[3] + = ubx | (uby << 8) | (ubz << 16) | (ubw << 24); + store_vector4( inst, machine, result ); + } + break; + case OPCODE_PK4UB: /* pack four GLubytes into one 32-bit float */ + { + GLfloat a[4], result[4]; + GLuint ubx, uby, ubz, ubw, *rawResult = (GLuint *) result; + fetch_vector4( ctx, &inst->SrcReg[0], machine, program, 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]); + rawResult[0] = rawResult[1] = rawResult[2] = rawResult[3] + = ubx | (uby << 8) | (ubz << 16) | (ubw << 24); + store_vector4( inst, machine, result ); + } + break; + case OPCODE_POW: + { + GLfloat a[4], b[4], result[4]; + fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a ); + fetch_vector1( ctx, &inst->SrcReg[1], machine, program, b ); + result[0] = result[1] = result[2] = result[3] + = (GLfloat)_mesa_pow(a[0], b[0]); + store_vector4( inst, machine, result ); + } + break; + case OPCODE_RCP: + { + GLfloat a[4], result[4]; + fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a ); + if (DEBUG_FRAG) { + 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 */ + { + /* NOTE: The return is conditional! */ + 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)) { + if (machine->StackDepth == 0) { + return GL_TRUE; /* Per GL_NV_vertex_program2 spec */ + } + pc = machine->CallStack[--machine->StackDepth]; + } + } + break; + case OPCODE_RFL: /* reflection vector */ + { + GLfloat axis[4], dir[4], result[4], tmpX, tmpW; + fetch_vector4( ctx, &inst->SrcReg[0], machine, program, axis ); + fetch_vector4( ctx, &inst->SrcReg[1], machine, program, 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( ctx, &inst->SrcReg[0], machine, program, 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_FRAG) { + 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( ctx, &inst->SrcReg[0], machine, program, a ); + result[0] = (GLfloat)_mesa_cos(a[0]); + result[1] = (GLfloat)_mesa_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( 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 ); + } + 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( 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 ); + } + 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 ); + } + break; + case OPCODE_SIN: + { + GLfloat a[4], result[4]; + fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a ); + result[0] = result[1] = result[2] = result[3] + = (GLfloat) _mesa_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( 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 ); + } + break; + case OPCODE_SLT: /* set on less */ + { + 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 ); + } + break; + case OPCODE_SNE: /* set on not equal */ + { + 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 ); + } + 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( ctx, &inst->SrcReg[0], machine, program, a ); + fetch_vector4( ctx, &inst->SrcReg[1], machine, program, 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_FRAG) { + 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_register_pointer(ctx, source, + machine, program); + 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->NegateBase & (1 << i)) + result[i] = -result[i]; + } + store_vector4( inst, machine, result ); + } + break; + case OPCODE_TEX: /* Both ARB and NV frag prog */ + /* Texel lookup */ + { + /* Note: only use the precomputed lambda value when we're + * sampling texture unit [K] with texcoord[K]. + * Otherwise, the lambda value may have no relation to the + * instruction's texcoord or texture image. Using the wrong + * lambda is usually bad news. + * The rest of the time, just use zero (until we get a more + * sophisticated way of computing lambda). + */ + GLfloat coord[4], color[4], lambda; + if (inst->SrcReg[0].File == PROGRAM_INPUT && + inst->SrcReg[0].Index == FRAG_ATTRIB_TEX0+inst->TexSrcUnit) + lambda = span->array->lambda[inst->TexSrcUnit][column]; + else + lambda = 0.0; + fetch_vector4(ctx, &inst->SrcReg[0], machine, program, coord); + fetch_texel( ctx, coord, lambda, inst->TexSrcUnit, color ); + if (DEBUG_FRAG) { + printf("TEX (%g, %g, %g, %g) = texture[%d][%g, %g, %g, %g], " + "lod %f\n", + color[0], color[1], color[2], color[3], + inst->TexSrcUnit, + coord[0], coord[1], coord[2], coord[3], lambda); + } + store_vector4( inst, machine, color ); + } + break; + case OPCODE_TXB: /* GL_ARB_fragment_program only */ + /* Texel lookup with LOD bias */ + { + GLfloat coord[4], color[4], lambda, bias; + if (inst->SrcReg[0].File == PROGRAM_INPUT && + inst->SrcReg[0].Index == FRAG_ATTRIB_TEX0+inst->TexSrcUnit) + lambda = span->array->lambda[inst->TexSrcUnit][column]; + else + lambda = 0.0; + fetch_vector4(ctx, &inst->SrcReg[0], machine, program, coord); + /* coord[3] is the bias to add to lambda */ + bias = ctx->Texture.Unit[inst->TexSrcUnit].LodBias + + ctx->Texture.Unit[inst->TexSrcUnit]._Current->LodBias + + coord[3]; + fetch_texel(ctx, coord, lambda + bias, inst->TexSrcUnit, color); + store_vector4( inst, machine, color ); + } + break; + case OPCODE_TXD: /* GL_NV_fragment_program only */ + /* Texture lookup w/ partial derivatives for LOD */ + { + GLfloat texcoord[4], dtdx[4], dtdy[4], color[4]; + fetch_vector4( ctx, &inst->SrcReg[0], machine, program, texcoord ); + fetch_vector4( ctx, &inst->SrcReg[1], machine, program, dtdx ); + fetch_vector4( ctx, &inst->SrcReg[2], machine, program, dtdy ); + fetch_texel_deriv( ctx, texcoord, dtdx, dtdy, 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], lambda; + if (inst->SrcReg[0].File == PROGRAM_INPUT && + inst->SrcReg[0].Index == FRAG_ATTRIB_TEX0+inst->TexSrcUnit) + lambda = span->array->lambda[inst->TexSrcUnit][column]; + else + lambda = 0.0; + fetch_vector4(ctx, &inst->SrcReg[0], machine, program,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, texcoord, lambda, inst->TexSrcUnit, color ); + store_vector4( inst, machine, color ); + } + break; + case OPCODE_TXP_NV: /* GL_NV_fragment_program only */ + /* Texture lookup w/ projective divide */ + { + GLfloat texcoord[4], color[4], lambda; + if (inst->SrcReg[0].File == PROGRAM_INPUT && + inst->SrcReg[0].Index == FRAG_ATTRIB_TEX0+inst->TexSrcUnit) + lambda = span->array->lambda[inst->TexSrcUnit][column]; + else + lambda = 0.0; + fetch_vector4(ctx, &inst->SrcReg[0], machine, program,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, texcoord, lambda, inst->TexSrcUnit, color ); + store_vector4( inst, machine, color ); + } + break; + case OPCODE_UP2H: /* unpack two 16-bit floats */ + { + GLfloat a[4], result[4]; + const GLuint *rawBits = (const GLuint *) a; + GLhalfNV hx, hy; + fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a ); + hx = rawBits[0] & 0xffff; + hy = rawBits[0] >> 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 */ + { + GLfloat a[4], result[4]; + const GLuint *rawBits = (const GLuint *) a; + GLushort usx, usy; + fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a ); + usx = rawBits[0] & 0xffff; + usy = rawBits[0] >> 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 */ + { + GLfloat a[4], result[4]; + const GLuint *rawBits = (const GLuint *) a; + fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a ); + result[0] = (((rawBits[0] >> 0) & 0xff) - 128) / 127.0F; + result[1] = (((rawBits[0] >> 8) & 0xff) - 128) / 127.0F; + result[2] = (((rawBits[0] >> 16) & 0xff) - 128) / 127.0F; + result[3] = (((rawBits[0] >> 24) & 0xff) - 128) / 127.0F; + store_vector4( inst, machine, result ); + } + break; + case OPCODE_UP4UB: /* unpack four GLubytes */ + { + GLfloat a[4], result[4]; + const GLuint *rawBits = (const GLuint *) a; + fetch_vector1( ctx, &inst->SrcReg[0], machine, program, a ); + result[0] = ((rawBits[0] >> 0) & 0xff) / 255.0F; + result[1] = ((rawBits[0] >> 8) & 0xff) / 255.0F; + result[2] = ((rawBits[0] >> 16) & 0xff) / 255.0F; + result[3] = ((rawBits[0] >> 24) & 0xff) / 255.0F; + store_vector4( inst, machine, result ); + } + break; + case OPCODE_XPD: /* cross product */ + { + 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[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 ); + } + break; + case OPCODE_X2D: /* 2-D matrix transform */ + { + 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] + 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 != -1) { + GLfloat a[4]; + fetch_vector4( ctx, &inst->SrcReg[0], machine, program, a); + _mesa_printf("%s%g, %g, %g, %g\n", (const char *) inst->Data, + a[0], a[1], a[2], a[3]); + } + else { + _mesa_printf("%s\n", (const char *) inst->Data); + } + } + break; + case OPCODE_END: + return GL_TRUE; + default: + _mesa_problem(ctx, "Bad opcode %d in _mesa_exec_fragment_program", + inst->Opcode); + return GL_TRUE; /* return value doesn't matter */ + } + } + return GL_TRUE; +} + + +/** + * Initialize the virtual fragment program machine state prior to running + * fragment program on a fragment. This involves initializing the input + * registers, condition codes, etc. + * \param machine the virtual machine state to init + * \param program the fragment program we're about to run + * \param span the span of pixels we'll operate on + * \param col which element (column) of the span we'll operate on + */ +static void +init_machine( GLcontext *ctx, struct fp_machine *machine, + const struct gl_fragment_program *program, + const SWspan *span, GLuint col ) +{ + GLuint inputsRead = program->Base.InputsRead; + GLuint u, v; + + if (ctx->FragmentProgram.CallbackEnabled) + inputsRead = ~0; + + if (program->Base.Target == GL_FRAGMENT_PROGRAM_NV) { + /* Clear temporary registers (undefined for ARB_f_p) */ + _mesa_bzero(machine->Temporaries, + MAX_NV_FRAGMENT_PROGRAM_TEMPS * 4 * sizeof(GLfloat)); + } + + /* Load input registers */ + if (inputsRead & (1 << FRAG_ATTRIB_WPOS)) { + GLfloat *wpos = machine->Inputs[FRAG_ATTRIB_WPOS]; + ASSERT(span->arrayMask & SPAN_Z); + if (span->arrayMask & SPAN_XY) { + wpos[0] = (GLfloat) span->array->x[col]; + wpos[1] = (GLfloat) span->array->y[col]; + } + else { + wpos[0] = (GLfloat) span->x + col; + wpos[1] = (GLfloat) span->y; + } + wpos[2] = (GLfloat) span->array->z[col] / ctx->DrawBuffer->_DepthMaxF; + wpos[3] = span->w + col * span->dwdx; + } + if (inputsRead & (1 << FRAG_ATTRIB_COL0)) { + ASSERT(span->arrayMask & SPAN_RGBA); + COPY_4V(machine->Inputs[FRAG_ATTRIB_COL0], + span->array->color.sz4.rgba[col]); + } + if (inputsRead & (1 << FRAG_ATTRIB_COL1)) { + ASSERT(span->arrayMask & SPAN_SPEC); + COPY_4V(machine->Inputs[FRAG_ATTRIB_COL1], + span->array->color.sz4.spec[col]); + } + if (inputsRead & (1 << FRAG_ATTRIB_FOGC)) { + GLfloat *fogc = machine->Inputs[FRAG_ATTRIB_FOGC]; + ASSERT(span->arrayMask & SPAN_FOG); + fogc[0] = span->array->fog[col]; + fogc[1] = 0.0F; + fogc[2] = 0.0F; + fogc[3] = 0.0F; + } + for (u = 0; u < ctx->Const.MaxTextureCoordUnits; u++) { + if (inputsRead & (1 << (FRAG_ATTRIB_TEX0 + u))) { + GLfloat *tex = machine->Inputs[FRAG_ATTRIB_TEX0 + u]; + /*ASSERT(ctx->Texture._EnabledCoordUnits & (1 << u));*/ + COPY_4V(tex, span->array->texcoords[u][col]); + /*ASSERT(tex[0] != 0 || tex[1] != 0 || tex[2] != 0);*/ + } + } + for (v = 0; v < ctx->Const.MaxVarying; v++) { + if (inputsRead & (1 << (FRAG_ATTRIB_VAR0 + v))) { +#if 0 + printf("Frag Var %d: %f %f %f\n", col, + span->array->varying[col][v][0], + span->array->varying[col][v][1], + span->array->varying[col][v][2]); +#endif + COPY_4V(machine->Inputs[FRAG_ATTRIB_VAR0 + v], + span->array->varying[col][v]); + } + } + + /* init condition codes */ + machine->CondCodes[0] = COND_EQ; + machine->CondCodes[1] = COND_EQ; + machine->CondCodes[2] = COND_EQ; + machine->CondCodes[3] = COND_EQ; + + /* init call stack */ + machine->StackDepth = 0; +} + + +/** + * Run fragment program on the pixels in span from 'start' to 'end' - 1. + */ +static void +run_program(GLcontext *ctx, SWspan *span, GLuint start, GLuint end) +{ + const struct gl_fragment_program *program = ctx->FragmentProgram._Current; + struct fp_machine machine; + GLuint i; + + CurrentMachine = &machine; + + for (i = start; i < end; i++) { + if (span->array->mask[i]) { + init_machine(ctx, &machine, program, span, i); + + if (execute_program(ctx, program, ~0, &machine, span, i)) { + /* Store result color */ + COPY_4V(span->array->color.sz4.rgba[i], + machine.Outputs[FRAG_RESULT_COLR]); + + /* Store result depth/z */ + if (program->Base.OutputsWritten & (1 << FRAG_RESULT_DEPR)) { + const GLfloat depth = machine.Outputs[FRAG_RESULT_DEPR][2]; + if (depth <= 0.0) + span->array->z[i] = 0; + else if (depth >= 1.0) + span->array->z[i] = ctx->DrawBuffer->_DepthMax; + else + span->array->z[i] = IROUND(depth * ctx->DrawBuffer->_DepthMaxF); + } + } + else { + /* killed fragment */ + span->array->mask[i] = GL_FALSE; + span->writeAll = GL_FALSE; + } + } + } + + CurrentMachine = NULL; +} + + +/** + * Execute the current fragment program for all the fragments + * in the given span. + */ +void +_swrast_exec_fragment_program( GLcontext *ctx, SWspan *span ) +{ + const struct gl_fragment_program *program = ctx->FragmentProgram._Current; + + /* incoming colors should be floats */ + ASSERT(span->array->ChanType == GL_FLOAT); + + ctx->_CurrentProgram = GL_FRAGMENT_PROGRAM_ARB; /* or NV, doesn't matter */ + + run_program(ctx, span, 0, span->end); + + if (program->Base.OutputsWritten & (1 << FRAG_RESULT_DEPR)) { + span->interpMask &= ~SPAN_Z; + span->arrayMask |= SPAN_Z; + } + + ctx->_CurrentProgram = 0; +} + diff --git a/src/mesa/swrast/s_fragprog.h b/src/mesa/swrast/s_fragprog.h new file mode 100644 index 0000000000..188bacc3d8 --- /dev/null +++ b/src/mesa/swrast/s_fragprog.h @@ -0,0 +1,37 @@ +/* + * Mesa 3-D graphics library + * Version: 6.1 + * + * Copyright (C) 1999-2003 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. + */ + + +#ifndef S_NVFRAGPROG_H +#define S_NVFRAGPROG_H + + +#include "s_context.h" + + +extern void +_swrast_exec_fragment_program( GLcontext *ctx, SWspan *span ); + + +#endif -- cgit v1.2.3