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/*
* Copyright (C) 2008 Nicolai Haehnle.
*
* 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 (including the
* next paragraph) 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 THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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.
*
*/
#include "radeon_program.h"
#include "radeon_compiler.h"
#include "shader/prog_parameter.h"
#include "shader/prog_print.h"
/**
* Transform the given clause in the following way:
* 1. Replace it with an empty clause
* 2. For every instruction in the original clause, try the given
* transformations in order.
* 3. If one of the transformations returns GL_TRUE, assume that it
* has emitted the appropriate instruction(s) into the new clause;
* otherwise, copy the instruction verbatim.
*
* \note The transformation is currently not recursive; in other words,
* instructions emitted by transformations are not transformed.
*
* \note The transform is called 'local' because it can only look at
* one instruction at a time.
*/
void radeonLocalTransform(
struct radeon_compiler * c,
int num_transformations,
struct radeon_program_transformation* transformations)
{
struct rc_instruction * inst = c->Program.Instructions.Next;
while(inst != &c->Program.Instructions) {
struct rc_instruction * current = inst;
int i;
inst = inst->Next;
for(i = 0; i < num_transformations; ++i) {
struct radeon_program_transformation* t = transformations + i;
if (t->function(c, current, t->userData))
break;
}
}
}
GLint rc_find_free_temporary(struct radeon_compiler * c)
{
GLboolean used[MAX_PROGRAM_TEMPS];
GLuint i;
memset(used, 0, sizeof(used));
for (struct rc_instruction * rcinst = c->Program.Instructions.Next; rcinst != &c->Program.Instructions; rcinst = rcinst->Next) {
const struct prog_instruction *inst = &rcinst->I;
const GLuint nsrc = _mesa_num_inst_src_regs(inst->Opcode);
const GLuint ndst = _mesa_num_inst_dst_regs(inst->Opcode);
GLuint k;
for (k = 0; k < nsrc; k++) {
if (inst->SrcReg[k].File == PROGRAM_TEMPORARY)
used[inst->SrcReg[k].Index] = GL_TRUE;
}
if (ndst) {
if (inst->DstReg.File == PROGRAM_TEMPORARY)
used[inst->DstReg.Index] = GL_TRUE;
}
}
for (i = 0; i < MAX_PROGRAM_TEMPS; i++) {
if (!used[i])
return i;
}
return -1;
}
struct rc_instruction *rc_alloc_instruction(struct radeon_compiler * c)
{
struct rc_instruction * inst = memory_pool_malloc(&c->Pool, sizeof(struct rc_instruction));
inst->Prev = 0;
inst->Next = 0;
_mesa_init_instructions(&inst->I, 1);
return inst;
}
struct rc_instruction *rc_insert_new_instruction(struct radeon_compiler * c, struct rc_instruction * after)
{
struct rc_instruction * inst = rc_alloc_instruction(c);
inst->Prev = after;
inst->Next = after->Next;
inst->Prev->Next = inst;
inst->Next->Prev = inst;
return inst;
}
void rc_remove_instruction(struct rc_instruction * inst)
{
inst->Prev->Next = inst->Next;
inst->Next->Prev = inst->Prev;
}
void rc_mesa_to_rc_program(struct radeon_compiler * c, struct gl_program * program)
{
struct prog_instruction *source;
unsigned int i;
for(source = program->Instructions; source->Opcode != OPCODE_END; ++source) {
struct rc_instruction * dest = rc_insert_new_instruction(c, c->Program.Instructions.Prev);
dest->I = *source;
}
c->Program.ShadowSamplers = program->ShadowSamplers;
c->Program.InputsRead = program->InputsRead;
c->Program.OutputsWritten = program->OutputsWritten;
for(i = 0; i < program->Parameters->NumParameters; ++i) {
struct rc_constant constant;
constant.Type = RC_CONSTANT_EXTERNAL;
constant.Size = 4;
constant.u.External = i;
rc_constants_add(&c->Program.Constants, &constant);
}
}
/**
* Print program to stderr, default options.
*/
void rc_print_program(const struct rc_program *prog)
{
GLuint indent = 0;
GLuint linenum = 1;
struct rc_instruction *inst;
fprintf(stderr, "# Radeon Compiler Program\n");
for(inst = prog->Instructions.Next; inst != &prog->Instructions; inst = inst->Next) {
fprintf(stderr, "%3d: ", linenum);
/* Massive hack: We rely on the fact that the printers do not actually
* use the gl_program argument (last argument) in debug mode */
indent = _mesa_fprint_instruction_opt(
stderr, &inst->I,
indent, PROG_PRINT_DEBUG, 0);
linenum++;
}
}
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