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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 <stdio.h>
#include "radeon_compiler.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;
}
}
}
/**
* Left multiplication of a register with a swizzle
*/
struct rc_src_register lmul_swizzle(unsigned int swizzle, struct rc_src_register srcreg)
{
struct rc_src_register tmp = srcreg;
int i;
tmp.Swizzle = 0;
tmp.Negate = 0;
for(i = 0; i < 4; ++i) {
rc_swizzle swz = GET_SWZ(swizzle, i);
if (swz < 4) {
tmp.Swizzle |= GET_SWZ(srcreg.Swizzle, swz) << (i*3);
tmp.Negate |= GET_BIT(srcreg.Negate, swz) << i;
} else {
tmp.Swizzle |= swz << (i*3);
}
}
return tmp;
}
unsigned int rc_find_free_temporary(struct radeon_compiler * c)
{
char used[RC_REGISTER_MAX_INDEX];
unsigned int i;
memset(used, 0, sizeof(used));
for (struct rc_instruction * rcinst = c->Program.Instructions.Next; rcinst != &c->Program.Instructions; rcinst = rcinst->Next) {
const struct rc_sub_instruction *inst = &rcinst->U.I;
const struct rc_opcode_info *opcode = rc_get_opcode_info(inst->Opcode);
unsigned int k;
for (k = 0; k < opcode->NumSrcRegs; k++) {
if (inst->SrcReg[k].File == RC_FILE_TEMPORARY)
used[inst->SrcReg[k].Index] = 1;
}
if (opcode->HasDstReg) {
if (inst->DstReg.File == RC_FILE_TEMPORARY)
used[inst->DstReg.Index] = 1;
}
}
for (i = 0; i < RC_REGISTER_MAX_INDEX; i++) {
if (!used[i])
return i;
}
rc_error(c, "Ran out of temporary registers\n");
return 0;
}
struct rc_instruction *rc_alloc_instruction(struct radeon_compiler * c)
{
struct rc_instruction * inst = memory_pool_malloc(&c->Pool, sizeof(struct rc_instruction));
memset(inst, 0, sizeof(struct rc_instruction));
inst->U.I.Opcode = RC_OPCODE_ILLEGAL_OPCODE;
inst->U.I.DstReg.WriteMask = RC_MASK_XYZW;
inst->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_XYZW;
inst->U.I.SrcReg[1].Swizzle = RC_SWIZZLE_XYZW;
inst->U.I.SrcReg[2].Swizzle = RC_SWIZZLE_XYZW;
return inst;
}
void rc_insert_instruction(struct rc_instruction * after, struct rc_instruction * inst)
{
inst->Prev = after;
inst->Next = after->Next;
inst->Prev->Next = inst;
inst->Next->Prev = inst;
}
struct rc_instruction *rc_insert_new_instruction(struct radeon_compiler * c, struct rc_instruction * after)
{
struct rc_instruction * inst = rc_alloc_instruction(c);
rc_insert_instruction(after, inst);
return inst;
}
void rc_remove_instruction(struct rc_instruction * inst)
{
inst->Prev->Next = inst->Next;
inst->Next->Prev = inst->Prev;
}
/**
* Return the number of instructions in the program.
*/
unsigned int rc_recompute_ips(struct radeon_compiler * c)
{
unsigned int ip = 0;
for(struct rc_instruction * inst = c->Program.Instructions.Next;
inst != &c->Program.Instructions;
inst = inst->Next) {
inst->IP = ip++;
}
c->Program.Instructions.IP = 0xcafedead;
return ip;
}
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