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56643096f1eb01eefa1a532ac096b32d23b6b8ba
third_party_mesa3d/src/mesa/program/program.c
Brian Paul 56643096f1 mesa: added gl_program::IndirectRegisterFiles field 
Now drivers, etc. can know which register files are accessed with
indirect addressing.  Before we just checked gl_program::NumAddressRegs
but didn't know if that was the constant buffer, temp regs, or what.

The only user of this new field so far will be the gallium state tracker.
2010-07-30 14:29:19 -06:00

965 lines
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/*
* Mesa 3-D graphics library
* Version: 6.5.3
*
* Copyright (C) 1999-2007 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 program.c
* Vertex and fragment program support functions.
* \author Brian Paul
*/
#include "main/glheader.h"
#include "main/context.h"
#include "main/hash.h"
#include "program.h"
#include "prog_cache.h"
#include "prog_parameter.h"
#include "prog_instruction.h"
/**
* A pointer to this dummy program is put into the hash table when
* glGenPrograms is called.
*/
struct gl_program _mesa_DummyProgram;
/**
* Init context's vertex/fragment program state
*/
void
_mesa_init_program(GLcontext *ctx)
{
GLuint i;
/*
* If this assertion fails, we need to increase the field
* size for register indexes.
*/
ASSERT(ctx->Const.VertexProgram.MaxUniformComponents / 4
<= (1 << INST_INDEX_BITS));
ASSERT(ctx->Const.FragmentProgram.MaxUniformComponents / 4
<= (1 << INST_INDEX_BITS));
/* If this fails, increase prog_instruction::TexSrcUnit size */
ASSERT(MAX_TEXTURE_UNITS < (1 << 5));
/* If this fails, increase prog_instruction::TexSrcTarget size */
ASSERT(NUM_TEXTURE_TARGETS < (1 << 3));
ctx->Program.ErrorPos = -1;
ctx->Program.ErrorString = _mesa_strdup("");
#if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
ctx->VertexProgram.Enabled = GL_FALSE;
#if FEATURE_es2_glsl
ctx->VertexProgram.PointSizeEnabled =
(ctx->API == API_OPENGLES2) ? GL_TRUE : GL_FALSE;
#else
ctx->VertexProgram.PointSizeEnabled = GL_FALSE;
#endif
ctx->VertexProgram.TwoSideEnabled = GL_FALSE;
_mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
ctx->Shared->DefaultVertexProgram);
assert(ctx->VertexProgram.Current);
for (i = 0; i < MAX_NV_VERTEX_PROGRAM_PARAMS / 4; i++) {
ctx->VertexProgram.TrackMatrix[i] = GL_NONE;
ctx->VertexProgram.TrackMatrixTransform[i] = GL_IDENTITY_NV;
}
ctx->VertexProgram.Cache = _mesa_new_program_cache();
#endif
#if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
ctx->FragmentProgram.Enabled = GL_FALSE;
_mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
ctx->Shared->DefaultFragmentProgram);
assert(ctx->FragmentProgram.Current);
ctx->FragmentProgram.Cache = _mesa_new_program_cache();
#endif
#if FEATURE_ARB_geometry_shader4
ctx->GeometryProgram.Enabled = GL_FALSE;
/* right now by default we don't have a geometry program */
_mesa_reference_geomprog(ctx, &ctx->GeometryProgram.Current,
NULL);
ctx->GeometryProgram.Cache = _mesa_new_program_cache();
#endif
/* XXX probably move this stuff */
#if FEATURE_ATI_fragment_shader
ctx->ATIFragmentShader.Enabled = GL_FALSE;
ctx->ATIFragmentShader.Current = ctx->Shared->DefaultFragmentShader;
assert(ctx->ATIFragmentShader.Current);
ctx->ATIFragmentShader.Current->RefCount++;
#endif
}
/**
* Free a context's vertex/fragment program state
*/
void
_mesa_free_program_data(GLcontext *ctx)
{
#if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
_mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current, NULL);
_mesa_delete_program_cache(ctx, ctx->VertexProgram.Cache);
#endif
#if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
_mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current, NULL);
_mesa_delete_program_cache(ctx, ctx->FragmentProgram.Cache);
#endif
#if FEATURE_ARB_geometry_shader4
_mesa_reference_geomprog(ctx, &ctx->GeometryProgram.Current, NULL);
_mesa_delete_program_cache(ctx, ctx->GeometryProgram.Cache);
#endif
/* XXX probably move this stuff */
#if FEATURE_ATI_fragment_shader
if (ctx->ATIFragmentShader.Current) {
ctx->ATIFragmentShader.Current->RefCount--;
if (ctx->ATIFragmentShader.Current->RefCount <= 0) {
free(ctx->ATIFragmentShader.Current);
}
}
#endif
free((void *) ctx->Program.ErrorString);
}
/**
* Update the default program objects in the given context to reference those
* specified in the shared state and release those referencing the old
* shared state.
*/
void
_mesa_update_default_objects_program(GLcontext *ctx)
{
#if FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
_mesa_reference_vertprog(ctx, &ctx->VertexProgram.Current,
(struct gl_vertex_program *)
ctx->Shared->DefaultVertexProgram);
assert(ctx->VertexProgram.Current);
#endif
#if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program
_mesa_reference_fragprog(ctx, &ctx->FragmentProgram.Current,
(struct gl_fragment_program *)
ctx->Shared->DefaultFragmentProgram);
assert(ctx->FragmentProgram.Current);
#endif
#if FEATURE_ARB_geometry_shader4
_mesa_reference_geomprog(ctx, &ctx->GeometryProgram.Current,
(struct gl_geometry_program *)
ctx->Shared->DefaultGeometryProgram);
#endif
/* XXX probably move this stuff */
#if FEATURE_ATI_fragment_shader
if (ctx->ATIFragmentShader.Current) {
ctx->ATIFragmentShader.Current->RefCount--;
if (ctx->ATIFragmentShader.Current->RefCount <= 0) {
free(ctx->ATIFragmentShader.Current);
}
}
ctx->ATIFragmentShader.Current = (struct ati_fragment_shader *) ctx->Shared->DefaultFragmentShader;
assert(ctx->ATIFragmentShader.Current);
ctx->ATIFragmentShader.Current->RefCount++;
#endif
}
/**
* Set the vertex/fragment program error state (position and error string).
* This is generally called from within the parsers.
*/
void
_mesa_set_program_error(GLcontext *ctx, GLint pos, const char *string)
{
ctx->Program.ErrorPos = pos;
free((void *) ctx->Program.ErrorString);
if (!string)
string = "";
ctx->Program.ErrorString = _mesa_strdup(string);
}
/**
* Find the line number and column for 'pos' within 'string'.
* Return a copy of the line which contains 'pos'. Free the line with
* free().
* \param string the program string
* \param pos the position within the string
* \param line returns the line number corresponding to 'pos'.
* \param col returns the column number corresponding to 'pos'.
* \return copy of the line containing 'pos'.
*/
const GLubyte *
_mesa_find_line_column(const GLubyte *string, const GLubyte *pos,
GLint *line, GLint *col)
{
const GLubyte *lineStart = string;
const GLubyte *p = string;
GLubyte *s;
int len;
*line = 1;
while (p != pos) {
if (*p == (GLubyte) '\n') {
(*line)++;
lineStart = p + 1;
}
p++;
}
*col = (pos - lineStart) + 1;
/* return copy of this line */
while (*p != 0 && *p != '\n')
p++;
len = p - lineStart;
s = (GLubyte *) malloc(len + 1);
memcpy(s, lineStart, len);
s[len] = 0;
return s;
}
/**
* Initialize a new vertex/fragment program object.
*/
static struct gl_program *
_mesa_init_program_struct( GLcontext *ctx, struct gl_program *prog,
GLenum target, GLuint id)
{
(void) ctx;
if (prog) {
GLuint i;
memset(prog, 0, sizeof(*prog));
prog->Id = id;
prog->Target = target;
prog->Resident = GL_TRUE;
prog->RefCount = 1;
prog->Format = GL_PROGRAM_FORMAT_ASCII_ARB;
/* default mapping from samplers to texture units */
for (i = 0; i < MAX_SAMPLERS; i++)
prog->SamplerUnits[i] = i;
}
return prog;
}
/**
* Initialize a new fragment program object.
*/
struct gl_program *
_mesa_init_fragment_program( GLcontext *ctx, struct gl_fragment_program *prog,
GLenum target, GLuint id)
{
if (prog)
return _mesa_init_program_struct( ctx, &prog->Base, target, id );
else
return NULL;
}
/**
* Initialize a new vertex program object.
*/
struct gl_program *
_mesa_init_vertex_program( GLcontext *ctx, struct gl_vertex_program *prog,
GLenum target, GLuint id)
{
if (prog)
return _mesa_init_program_struct( ctx, &prog->Base, target, id );
else
return NULL;
}
/**
* Initialize a new geometry program object.
*/
struct gl_program *
_mesa_init_geometry_program( GLcontext *ctx, struct gl_geometry_program *prog,
GLenum target, GLuint id)
{
if (prog)
return _mesa_init_program_struct( ctx, &prog->Base, target, id );
else
return NULL;
}
/**
* Allocate and initialize a new fragment/vertex program object but
* don't put it into the program hash table. Called via
* ctx->Driver.NewProgram. May be overridden (ie. replaced) by a
* device driver function to implement OO deriviation with additional
* types not understood by this function.
*
* \param ctx context
* \param id program id/number
* \param target program target/type
* \return pointer to new program object
*/
struct gl_program *
_mesa_new_program(GLcontext *ctx, GLenum target, GLuint id)
{
struct gl_program *prog;
switch (target) {
case GL_VERTEX_PROGRAM_ARB: /* == GL_VERTEX_PROGRAM_NV */
case GL_VERTEX_STATE_PROGRAM_NV:
prog = _mesa_init_vertex_program(ctx, CALLOC_STRUCT(gl_vertex_program),
target, id );
break;
case GL_FRAGMENT_PROGRAM_NV:
case GL_FRAGMENT_PROGRAM_ARB:
prog =_mesa_init_fragment_program(ctx,
CALLOC_STRUCT(gl_fragment_program),
target, id );
break;
case MESA_GEOMETRY_PROGRAM:
prog = _mesa_init_geometry_program(ctx,
CALLOC_STRUCT(gl_geometry_program),
target, id);
break;
default:
_mesa_problem(ctx, "bad target in _mesa_new_program");
prog = NULL;
}
return prog;
}
/**
* Delete a program and remove it from the hash table, ignoring the
* reference count.
* Called via ctx->Driver.DeleteProgram. May be wrapped (OO deriviation)
* by a device driver function.
*/
void
_mesa_delete_program(GLcontext *ctx, struct gl_program *prog)
{
(void) ctx;
ASSERT(prog);
ASSERT(prog->RefCount==0);
if (prog == &_mesa_DummyProgram)
return;
if (prog->String)
free(prog->String);
_mesa_free_instructions(prog->Instructions, prog->NumInstructions);
if (prog->Parameters) {
_mesa_free_parameter_list(prog->Parameters);
}
if (prog->Varying) {
_mesa_free_parameter_list(prog->Varying);
}
if (prog->Attributes) {
_mesa_free_parameter_list(prog->Attributes);
}
free(prog);
}
/**
* Return the gl_program object for a given ID.
* Basically just a wrapper for _mesa_HashLookup() to avoid a lot of
* casts elsewhere.
*/
struct gl_program *
_mesa_lookup_program(GLcontext *ctx, GLuint id)
{
if (id)
return (struct gl_program *) _mesa_HashLookup(ctx->Shared->Programs, id);
else
return NULL;
}
/**
* Reference counting for vertex/fragment programs
*/
void
_mesa_reference_program(GLcontext *ctx,
struct gl_program **ptr,
struct gl_program *prog)
{
assert(ptr);
if (*ptr && prog) {
/* sanity check */
if ((*ptr)->Target == GL_VERTEX_PROGRAM_ARB)
ASSERT(prog->Target == GL_VERTEX_PROGRAM_ARB);
else if ((*ptr)->Target == GL_FRAGMENT_PROGRAM_ARB)
ASSERT(prog->Target == GL_FRAGMENT_PROGRAM_ARB ||
prog->Target == GL_FRAGMENT_PROGRAM_NV);
else if ((*ptr)->Target == MESA_GEOMETRY_PROGRAM)
ASSERT(prog->Target == MESA_GEOMETRY_PROGRAM);
}
if (*ptr == prog) {
return; /* no change */
}
if (*ptr) {
GLboolean deleteFlag;
/*_glthread_LOCK_MUTEX((*ptr)->Mutex);*/
#if 0
printf("Program %p ID=%u Target=%s Refcount-- to %d\n",
*ptr, (*ptr)->Id,
((*ptr)->Target == GL_VERTEX_PROGRAM_ARB ? "VP" :
((*ptr)->Target == MESA_GEOMETRY_PROGRAM ? "GP" : "FP")),
(*ptr)->RefCount - 1);
#endif
ASSERT((*ptr)->RefCount > 0);
(*ptr)->RefCount--;
deleteFlag = ((*ptr)->RefCount == 0);
/*_glthread_UNLOCK_MUTEX((*ptr)->Mutex);*/
if (deleteFlag) {
ASSERT(ctx);
ctx->Driver.DeleteProgram(ctx, *ptr);
}
*ptr = NULL;
}
assert(!*ptr);
if (prog) {
/*_glthread_LOCK_MUTEX(prog->Mutex);*/
prog->RefCount++;
#if 0
printf("Program %p ID=%u Target=%s Refcount++ to %d\n",
prog, prog->Id,
(prog->Target == GL_VERTEX_PROGRAM_ARB ? "VP" :
(prog->Target == MESA_GEOMETRY_PROGRAM ? "GP" : "FP")),
prog->RefCount);
#endif
/*_glthread_UNLOCK_MUTEX(prog->Mutex);*/
}
*ptr = prog;
}
/**
* Return a copy of a program.
* XXX Problem here if the program object is actually OO-derivation
* made by a device driver.
*/
struct gl_program *
_mesa_clone_program(GLcontext *ctx, const struct gl_program *prog)
{
struct gl_program *clone;
clone = ctx->Driver.NewProgram(ctx, prog->Target, prog->Id);
if (!clone)
return NULL;
assert(clone->Target == prog->Target);
assert(clone->RefCount == 1);
clone->String = (GLubyte *) _mesa_strdup((char *) prog->String);
clone->Format = prog->Format;
clone->Instructions = _mesa_alloc_instructions(prog->NumInstructions);
if (!clone->Instructions) {
_mesa_reference_program(ctx, &clone, NULL);
return NULL;
}
_mesa_copy_instructions(clone->Instructions, prog->Instructions,
prog->NumInstructions);
clone->InputsRead = prog->InputsRead;
clone->OutputsWritten = prog->OutputsWritten;
clone->SamplersUsed = prog->SamplersUsed;
clone->ShadowSamplers = prog->ShadowSamplers;
memcpy(clone->TexturesUsed, prog->TexturesUsed, sizeof(prog->TexturesUsed));
if (prog->Parameters)
clone->Parameters = _mesa_clone_parameter_list(prog->Parameters);
memcpy(clone->LocalParams, prog->LocalParams, sizeof(clone->LocalParams));
if (prog->Varying)
clone->Varying = _mesa_clone_parameter_list(prog->Varying);
if (prog->Attributes)
clone->Attributes = _mesa_clone_parameter_list(prog->Attributes);
memcpy(clone->LocalParams, prog->LocalParams, sizeof(clone->LocalParams));
clone->IndirectRegisterFiles = prog->IndirectRegisterFiles;
clone->NumInstructions = prog->NumInstructions;
clone->NumTemporaries = prog->NumTemporaries;
clone->NumParameters = prog->NumParameters;
clone->NumAttributes = prog->NumAttributes;
clone->NumAddressRegs = prog->NumAddressRegs;
clone->NumNativeInstructions = prog->NumNativeInstructions;
clone->NumNativeTemporaries = prog->NumNativeTemporaries;
clone->NumNativeParameters = prog->NumNativeParameters;
clone->NumNativeAttributes = prog->NumNativeAttributes;
clone->NumNativeAddressRegs = prog->NumNativeAddressRegs;
clone->NumAluInstructions = prog->NumAluInstructions;
clone->NumTexInstructions = prog->NumTexInstructions;
clone->NumTexIndirections = prog->NumTexIndirections;
clone->NumNativeAluInstructions = prog->NumNativeAluInstructions;
clone->NumNativeTexInstructions = prog->NumNativeTexInstructions;
clone->NumNativeTexIndirections = prog->NumNativeTexIndirections;
switch (prog->Target) {
case GL_VERTEX_PROGRAM_ARB:
{
const struct gl_vertex_program *vp
= (const struct gl_vertex_program *) prog;
struct gl_vertex_program *vpc = (struct gl_vertex_program *) clone;
vpc->IsPositionInvariant = vp->IsPositionInvariant;
vpc->IsNVProgram = vp->IsNVProgram;
}
break;
case GL_FRAGMENT_PROGRAM_ARB:
{
const struct gl_fragment_program *fp
= (const struct gl_fragment_program *) prog;
struct gl_fragment_program *fpc = (struct gl_fragment_program *) clone;
fpc->FogOption = fp->FogOption;
fpc->UsesKill = fp->UsesKill;
fpc->OriginUpperLeft = fp->OriginUpperLeft;
fpc->PixelCenterInteger = fp->PixelCenterInteger;
}
break;
case MESA_GEOMETRY_PROGRAM:
{
const struct gl_geometry_program *gp
= (const struct gl_geometry_program *) prog;
struct gl_geometry_program *gpc = (struct gl_geometry_program *) clone;
gpc->VerticesOut = gp->VerticesOut;
gpc->InputType = gp->InputType;
gpc->OutputType = gp->OutputType;
}
break;
default:
_mesa_problem(NULL, "Unexpected target in _mesa_clone_program");
}
return clone;
}
/**
* Insert 'count' NOP instructions at 'start' in the given program.
* Adjust branch targets accordingly.
*/
GLboolean
_mesa_insert_instructions(struct gl_program *prog, GLuint start, GLuint count)
{
const GLuint origLen = prog->NumInstructions;
const GLuint newLen = origLen + count;
struct prog_instruction *newInst;
GLuint i;
/* adjust branches */
for (i = 0; i < prog->NumInstructions; i++) {
struct prog_instruction *inst = prog->Instructions + i;
if (inst->BranchTarget > 0) {
if ((GLuint)inst->BranchTarget >= start) {
inst->BranchTarget += count;
}
}
}
/* Alloc storage for new instructions */
newInst = _mesa_alloc_instructions(newLen);
if (!newInst) {
return GL_FALSE;
}
/* Copy 'start' instructions into new instruction buffer */
_mesa_copy_instructions(newInst, prog->Instructions, start);
/* init the new instructions */
_mesa_init_instructions(newInst + start, count);
/* Copy the remaining/tail instructions to new inst buffer */
_mesa_copy_instructions(newInst + start + count,
prog->Instructions + start,
origLen - start);
/* free old instructions */
_mesa_free_instructions(prog->Instructions, origLen);
/* install new instructions */
prog->Instructions = newInst;
prog->NumInstructions = newLen;
return GL_TRUE;
}
/**
* Delete 'count' instructions at 'start' in the given program.
* Adjust branch targets accordingly.
*/
GLboolean
_mesa_delete_instructions(struct gl_program *prog, GLuint start, GLuint count)
{
const GLuint origLen = prog->NumInstructions;
const GLuint newLen = origLen - count;
struct prog_instruction *newInst;
GLuint i;
/* adjust branches */
for (i = 0; i < prog->NumInstructions; i++) {
struct prog_instruction *inst = prog->Instructions + i;
if (inst->BranchTarget > 0) {
if (inst->BranchTarget > (GLint) start) {
inst->BranchTarget -= count;
}
}
}
/* Alloc storage for new instructions */
newInst = _mesa_alloc_instructions(newLen);
if (!newInst) {
return GL_FALSE;
}
/* Copy 'start' instructions into new instruction buffer */
_mesa_copy_instructions(newInst, prog->Instructions, start);
/* Copy the remaining/tail instructions to new inst buffer */
_mesa_copy_instructions(newInst + start,
prog->Instructions + start + count,
newLen - start);
/* free old instructions */
_mesa_free_instructions(prog->Instructions, origLen);
/* install new instructions */
prog->Instructions = newInst;
prog->NumInstructions = newLen;
return GL_TRUE;
}
/**
* Search instructions for registers that match (oldFile, oldIndex),
* replacing them with (newFile, newIndex).
*/
static void
replace_registers(struct prog_instruction *inst, GLuint numInst,
GLuint oldFile, GLuint oldIndex,
GLuint newFile, GLuint newIndex)
{
GLuint i, j;
for (i = 0; i < numInst; i++) {
/* src regs */
for (j = 0; j < _mesa_num_inst_src_regs(inst[i].Opcode); j++) {
if (inst[i].SrcReg[j].File == oldFile &&
inst[i].SrcReg[j].Index == oldIndex) {
inst[i].SrcReg[j].File = newFile;
inst[i].SrcReg[j].Index = newIndex;
}
}
/* dst reg */
if (inst[i].DstReg.File == oldFile && inst[i].DstReg.Index == oldIndex) {
inst[i].DstReg.File = newFile;
inst[i].DstReg.Index = newIndex;
}
}
}
/**
* Search instructions for references to program parameters. When found,
* increment the parameter index by 'offset'.
* Used when combining programs.
*/
static void
adjust_param_indexes(struct prog_instruction *inst, GLuint numInst,
GLuint offset)
{
GLuint i, j;
for (i = 0; i < numInst; i++) {
for (j = 0; j < _mesa_num_inst_src_regs(inst[i].Opcode); j++) {
GLuint f = inst[i].SrcReg[j].File;
if (f == PROGRAM_CONSTANT ||
f == PROGRAM_UNIFORM ||
f == PROGRAM_STATE_VAR) {
inst[i].SrcReg[j].Index += offset;
}
}
}
}
/**
* Combine two programs into one. Fix instructions so the outputs of
* the first program go to the inputs of the second program.
*/
struct gl_program *
_mesa_combine_programs(GLcontext *ctx,
const struct gl_program *progA,
const struct gl_program *progB)
{
struct prog_instruction *newInst;
struct gl_program *newProg;
const GLuint lenA = progA->NumInstructions - 1; /* omit END instr */
const GLuint lenB = progB->NumInstructions;
const GLuint numParamsA = _mesa_num_parameters(progA->Parameters);
const GLuint newLength = lenA + lenB;
GLboolean usedTemps[MAX_PROGRAM_TEMPS];
GLuint firstTemp = 0;
GLbitfield inputsB;
GLuint i;
ASSERT(progA->Target == progB->Target);
newInst = _mesa_alloc_instructions(newLength);
if (!newInst)
return GL_FALSE;
_mesa_copy_instructions(newInst, progA->Instructions, lenA);
_mesa_copy_instructions(newInst + lenA, progB->Instructions, lenB);
/* adjust branch / instruction addresses for B's instructions */
for (i = 0; i < lenB; i++) {
newInst[lenA + i].BranchTarget += lenA;
}
newProg = ctx->Driver.NewProgram(ctx, progA->Target, 0);
newProg->Instructions = newInst;
newProg->NumInstructions = newLength;
/* find used temp regs (we may need new temps below) */
_mesa_find_used_registers(newProg, PROGRAM_TEMPORARY,
usedTemps, MAX_PROGRAM_TEMPS);
if (newProg->Target == GL_FRAGMENT_PROGRAM_ARB) {
struct gl_fragment_program *fprogA, *fprogB, *newFprog;
GLbitfield progB_inputsRead = progB->InputsRead;
GLint progB_colorFile, progB_colorIndex;
fprogA = (struct gl_fragment_program *) progA;
fprogB = (struct gl_fragment_program *) progB;
newFprog = (struct gl_fragment_program *) newProg;
newFprog->UsesKill = fprogA->UsesKill || fprogB->UsesKill;
/* We'll do a search and replace for instances
* of progB_colorFile/progB_colorIndex below...
*/
progB_colorFile = PROGRAM_INPUT;
progB_colorIndex = FRAG_ATTRIB_COL0;
/*
* The fragment program may get color from a state var rather than
* a fragment input (vertex output) if it's constant.
* See the texenvprogram.c code.
* So, search the program's parameter list now to see if the program
* gets color from a state var instead of a conventional fragment
* input register.
*/
for (i = 0; i < progB->Parameters->NumParameters; i++) {
struct gl_program_parameter *p = &progB->Parameters->Parameters[i];
if (p->Type == PROGRAM_STATE_VAR &&
p->StateIndexes[0] == STATE_INTERNAL &&
p->StateIndexes[1] == STATE_CURRENT_ATTRIB &&
p->StateIndexes[2] == VERT_ATTRIB_COLOR0) {
progB_inputsRead |= FRAG_BIT_COL0;
progB_colorFile = PROGRAM_STATE_VAR;
progB_colorIndex = i;
break;
}
}
/* Connect color outputs of fprogA to color inputs of fprogB, via a
* new temporary register.
*/
if ((progA->OutputsWritten & (1 << FRAG_RESULT_COLOR)) &&
(progB_inputsRead & FRAG_BIT_COL0)) {
GLint tempReg = _mesa_find_free_register(usedTemps, MAX_PROGRAM_TEMPS,
firstTemp);
if (tempReg < 0) {
_mesa_problem(ctx, "No free temp regs found in "
"_mesa_combine_programs(), using 31");
tempReg = 31;
}
firstTemp = tempReg + 1;
/* replace writes to result.color[0] with tempReg */
replace_registers(newInst, lenA,
PROGRAM_OUTPUT, FRAG_RESULT_COLOR,
PROGRAM_TEMPORARY, tempReg);
/* replace reads from the input color with tempReg */
replace_registers(newInst + lenA, lenB,
progB_colorFile, progB_colorIndex, /* search for */
PROGRAM_TEMPORARY, tempReg /* replace with */ );
}
/* compute combined program's InputsRead */
inputsB = progB_inputsRead;
if (progA->OutputsWritten & (1 << FRAG_RESULT_COLOR)) {
inputsB &= ~(1 << FRAG_ATTRIB_COL0);
}
newProg->InputsRead = progA->InputsRead | inputsB;
newProg->OutputsWritten = progB->OutputsWritten;
newProg->SamplersUsed = progA->SamplersUsed | progB->SamplersUsed;
}
else {
/* vertex program */
assert(0); /* XXX todo */
}
/*
* Merge parameters (uniforms, constants, etc)
*/
newProg->Parameters = _mesa_combine_parameter_lists(progA->Parameters,
progB->Parameters);
adjust_param_indexes(newInst + lenA, lenB, numParamsA);
return newProg;
}
/**
* Populate the 'used' array with flags indicating which registers (TEMPs,
* INPUTs, OUTPUTs, etc, are used by the given program.
* \param file type of register to scan for
* \param used returns true/false flags for in use / free
* \param usedSize size of the 'used' array
*/
void
_mesa_find_used_registers(const struct gl_program *prog,
gl_register_file file,
GLboolean used[], GLuint usedSize)
{
GLuint i, j;
memset(used, 0, usedSize);
for (i = 0; i < prog->NumInstructions; i++) {
const struct prog_instruction *inst = prog->Instructions + i;
const GLuint n = _mesa_num_inst_src_regs(inst->Opcode);
if (inst->DstReg.File == file) {
used[inst->DstReg.Index] = GL_TRUE;
}
for (j = 0; j < n; j++) {
if (inst->SrcReg[j].File == file) {
used[inst->SrcReg[j].Index] = GL_TRUE;
}
}
}
}
/**
* Scan the given 'used' register flag array for the first entry
* that's >= firstReg.
* \param used vector of flags indicating registers in use (as returned
* by _mesa_find_used_registers())
* \param usedSize size of the 'used' array
* \param firstReg first register to start searching at
* \return index of unused register, or -1 if none.
*/
GLint
_mesa_find_free_register(const GLboolean used[],
GLuint usedSize, GLuint firstReg)
{
GLuint i;
assert(firstReg < usedSize);
for (i = firstReg; i < usedSize; i++)
if (!used[i])
return i;
return -1;
}
/**
* "Post-process" a GPU program. This is intended to be used for debugging.
* Example actions include no-op'ing instructions or changing instruction
* behaviour.
*/
void
_mesa_postprocess_program(GLcontext *ctx, struct gl_program *prog)
{
static const GLfloat white[4] = { 0.5, 0.5, 0.5, 0.5 };
GLuint i;
GLuint whiteSwizzle;
GLint whiteIndex = _mesa_add_unnamed_constant(prog->Parameters,
white, 4, &whiteSwizzle);
(void) whiteIndex;
for (i = 0; i < prog->NumInstructions; i++) {
struct prog_instruction *inst = prog->Instructions + i;
const GLuint n = _mesa_num_inst_src_regs(inst->Opcode);
(void) n;
if (_mesa_is_tex_instruction(inst->Opcode)) {
#if 0
/* replace TEX/TXP/TXB with MOV */
inst->Opcode = OPCODE_MOV;
inst->DstReg.WriteMask = WRITEMASK_XYZW;
inst->SrcReg[0].Swizzle = SWIZZLE_XYZW;
inst->SrcReg[0].Negate = NEGATE_NONE;
#endif
#if 0
/* disable shadow texture mode */
inst->TexShadow = 0;
#endif
}
if (inst->Opcode == OPCODE_TXP) {
#if 0
inst->Opcode = OPCODE_MOV;
inst->DstReg.WriteMask = WRITEMASK_XYZW;
inst->SrcReg[0].File = PROGRAM_CONSTANT;
inst->SrcReg[0].Index = whiteIndex;
inst->SrcReg[0].Swizzle = SWIZZLE_XYZW;
inst->SrcReg[0].Negate = NEGATE_NONE;
#endif
#if 0
inst->TexShadow = 0;
#endif
#if 0
inst->Opcode = OPCODE_TEX;
inst->TexShadow = 0;
#endif
}
}
}
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