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/*
* Copyright 2009 Nicolai Hähnle <nhaehnle@gmail.com>
*
* 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
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHOR(S) AND/OR THEIR 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_compiler.h"
#include "shader/prog_parameter.h"
#include "shader/prog_print.h"
#include "shader/prog_statevars.h"
#include "radeon_nqssadce.h"
#include "radeon_program_alu.h"
#include "r300_fragprog.h"
#include "r300_fragprog_swizzle.h"
#include "r500_fragprog.h"
static void nqssadce_init(struct nqssadce_state* s)
{
s->Outputs[FRAG_RESULT_COLOR].Sourced = WRITEMASK_XYZW;
s->Outputs[FRAG_RESULT_DEPTH].Sourced = WRITEMASK_W;
}
/**
* Transform the program to support fragment.position.
*
* Introduce a small fragment at the start of the program that will be
* the only code that directly reads the FRAG_ATTRIB_WPOS input.
* All other code pieces that reference that input will be rewritten
* to read from a newly allocated temporary.
*
*/
static void insert_WPOS_trailer(struct r300_fragment_program_compiler *compiler)
{
int i;
if (!(compiler->Base.Program.InputsRead & FRAG_BIT_WPOS)) {
compiler->code->wpos_attr = FRAG_ATTRIB_MAX;
return;
}
for (i = FRAG_ATTRIB_TEX0; i <= FRAG_ATTRIB_TEX7; ++i)
{
if (!(compiler->Base.Program.InputsRead & (1 << i))) {
compiler->code->wpos_attr = i;
break;
}
}
rc_transform_fragment_wpos(&compiler->Base, FRAG_ATTRIB_WPOS, compiler->code->wpos_attr);
}
/**
* Rewrite fragment.fogcoord to use a texture coordinate slot.
* Note that fogcoord is forced into an X001 pattern, and this enforcement
* is done here.
*
* See also the counterpart rewriting for vertex programs.
*/
static void rewriteFog(struct r300_fragment_program_compiler *compiler)
{
struct rX00_fragment_program_code *code = compiler->code;
struct prog_src_register src;
int i;
if (!(compiler->Base.Program.InputsRead & FRAG_BIT_FOGC)) {
code->fog_attr = FRAG_ATTRIB_MAX;
return;
}
for (i = FRAG_ATTRIB_TEX0; i <= FRAG_ATTRIB_TEX7; ++i)
{
if (!(compiler->Base.Program.InputsRead & (1 << i))) {
code->fog_attr = i;
break;
}
}
reset_srcreg(&src);
src.File = PROGRAM_INPUT;
src.Index = code->fog_attr;
src.Swizzle = MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_ZERO, SWIZZLE_ZERO, SWIZZLE_ONE);
rc_move_input(&compiler->Base, FRAG_ATTRIB_FOGC, src);
}
static void rewrite_depth_out(struct r300_fragment_program_compiler * c)
{
struct rc_instruction *rci;
for (rci = c->Base.Program.Instructions.Next; rci != &c->Base.Program.Instructions; rci = rci->Next) {
struct prog_instruction * inst = &rci->I;
if (inst->DstReg.File != PROGRAM_OUTPUT || inst->DstReg.Index != FRAG_RESULT_DEPTH)
continue;
if (inst->DstReg.WriteMask & WRITEMASK_Z) {
inst->DstReg.WriteMask = WRITEMASK_W;
} else {
inst->DstReg.WriteMask = 0;
continue;
}
switch (inst->Opcode) {
case OPCODE_FRC:
case OPCODE_MOV:
inst->SrcReg[0] = lmul_swizzle(SWIZZLE_ZZZZ, inst->SrcReg[0]);
break;
case OPCODE_ADD:
case OPCODE_MAX:
case OPCODE_MIN:
case OPCODE_MUL:
inst->SrcReg[0] = lmul_swizzle(SWIZZLE_ZZZZ, inst->SrcReg[0]);
inst->SrcReg[1] = lmul_swizzle(SWIZZLE_ZZZZ, inst->SrcReg[1]);
break;
case OPCODE_CMP:
case OPCODE_MAD:
inst->SrcReg[0] = lmul_swizzle(SWIZZLE_ZZZZ, inst->SrcReg[0]);
inst->SrcReg[1] = lmul_swizzle(SWIZZLE_ZZZZ, inst->SrcReg[1]);
inst->SrcReg[2] = lmul_swizzle(SWIZZLE_ZZZZ, inst->SrcReg[2]);
break;
default:
// Scalar instructions needn't be reswizzled
break;
}
}
}
void r3xx_compile_fragment_program(struct r300_fragment_program_compiler* c)
{
if (c->Base.Debug) {
fflush(stdout);
_mesa_printf("Fragment Program: Initial program:\n");
_mesa_print_program(c->program);
fflush(stdout);
}
rc_mesa_to_rc_program(&c->Base, c->program);
insert_WPOS_trailer(c);
rewriteFog(c);
rewrite_depth_out(c);
if (c->is_r500) {
struct radeon_program_transformation transformations[] = {
{ &r500_transform_TEX, c },
{ &radeonTransformALU, 0 },
{ &radeonTransformDeriv, 0 },
{ &radeonTransformTrigScale, 0 }
};
radeonLocalTransform(&c->Base, 4, transformations);
} else {
struct radeon_program_transformation transformations[] = {
{ &r300_transform_TEX, c },
{ &radeonTransformALU, 0 },
{ &radeonTransformTrigSimple, 0 }
};
radeonLocalTransform(&c->Base, 3, transformations);
}
if (c->Base.Debug) {
_mesa_printf("Fragment Program: After native rewrite:\n");
rc_print_program(&c->Base.Program);
fflush(stdout);
}
if (c->is_r500) {
struct radeon_nqssadce_descr nqssadce = {
.Init = &nqssadce_init,
.IsNativeSwizzle = &r500FPIsNativeSwizzle,
.BuildSwizzle = &r500FPBuildSwizzle
};
radeonNqssaDce(&c->Base, &nqssadce, 0);
} else {
struct radeon_nqssadce_descr nqssadce = {
.Init = &nqssadce_init,
.IsNativeSwizzle = &r300FPIsNativeSwizzle,
.BuildSwizzle = &r300FPBuildSwizzle
};
radeonNqssaDce(&c->Base, &nqssadce, 0);
}
if (c->Base.Debug) {
_mesa_printf("Compiler: after NqSSA-DCE:\n");
rc_print_program(&c->Base.Program);
fflush(stdout);
}
if (c->is_r500) {
r500BuildFragmentProgramHwCode(c);
} else {
r300BuildFragmentProgramHwCode(c);
}
rc_constants_copy(&c->code->constants, &c->Base.Program.Constants);
if (c->Base.Debug) {
if (c->is_r500) {
r500FragmentProgramDump(c->code);
} else {
r300FragmentProgramDump(c->code);
}
}
}
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