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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 "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(
GLcontext *Ctx,
struct gl_program *program,
int num_transformations,
struct radeon_program_transformation* transformations)
{
struct radeon_transform_context ctx;
int ip;
ctx.Ctx = Ctx;
ctx.Program = program;
ctx.OldInstructions = program->Instructions;
ctx.OldNumInstructions = program->NumInstructions;
program->Instructions = 0;
program->NumInstructions = 0;
for(ip = 0; ip < ctx.OldNumInstructions; ++ip) {
struct prog_instruction *instr = ctx.OldInstructions + ip;
int i;
for(i = 0; i < num_transformations; ++i) {
struct radeon_program_transformation* t = transformations + i;
if (t->function(&ctx, instr, t->userData))
break;
}
if (i >= num_transformations) {
struct prog_instruction* dest = radeonAppendInstructions(program, 1);
_mesa_copy_instructions(dest, instr, 1);
}
}
_mesa_free_instructions(ctx.OldInstructions, ctx.OldNumInstructions);
}
static void scan_instructions(GLboolean* used, const struct prog_instruction* insts, GLuint count)
{
GLuint i;
for (i = 0; i < count; i++) {
const struct prog_instruction *inst = insts + i;
const GLuint n = _mesa_num_inst_src_regs(inst->Opcode);
GLuint k;
for (k = 0; k < n; k++) {
if (inst->SrcReg[k].File == PROGRAM_TEMPORARY)
used[inst->SrcReg[k].Index] = GL_TRUE;
}
}
}
GLint radeonFindFreeTemporary(struct radeon_transform_context *t)
{
GLboolean used[MAX_PROGRAM_TEMPS];
GLuint i;
_mesa_memset(used, 0, sizeof(used));
scan_instructions(used, t->Program->Instructions, t->Program->NumInstructions);
scan_instructions(used, t->OldInstructions, t->OldNumInstructions);
for (i = 0; i < MAX_PROGRAM_TEMPS; i++) {
if (!used[i])
return i;
}
return -1;
}
/**
* Append the given number of instructions to the program and return a
* pointer to the first new instruction.
*/
struct prog_instruction *radeonAppendInstructions(struct gl_program *program, int count)
{
int oldnum = program->NumInstructions;
_mesa_insert_instructions(program, oldnum, count);
return program->Instructions + oldnum;
}
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