/*
* Copyright (C) 2016 Miklós Máté
*
* 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
* THE AUTHORS OR COPYRIGHT HOLDERS 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 "main/mtypes.h"
#include "main/atifragshader.h"
#include "main/errors.h"
#include "program/prog_parameter.h"
#include "tgsi/tgsi_ureg.h"
#include "tgsi/tgsi_scan.h"
#include "tgsi/tgsi_transform.h"
#include "st_program.h"
#include "st_atifs_to_tgsi.h"
/**
* Intermediate state used during shader translation.
*/
struct st_translate {
struct ureg_program *ureg;
struct ati_fragment_shader *atifs;
struct ureg_dst temps[MAX_PROGRAM_TEMPS];
struct ureg_src *constants;
struct ureg_dst outputs[PIPE_MAX_SHADER_OUTPUTS];
struct ureg_src inputs[PIPE_MAX_SHADER_INPUTS];
struct ureg_src samplers[PIPE_MAX_SAMPLERS];
const ubyte *inputMapping;
const ubyte *outputMapping;
unsigned current_pass;
bool regs_written[MAX_NUM_PASSES_ATI][MAX_NUM_FRAGMENT_REGISTERS_ATI];
boolean error;
};
struct instruction_desc {
unsigned TGSI_opcode;
const char *name;
unsigned char arg_count;
};
static const struct instruction_desc inst_desc[] = {
{TGSI_OPCODE_MOV, "MOV", 1},
{TGSI_OPCODE_NOP, "UND", 0}, /* unused */
{TGSI_OPCODE_ADD, "ADD", 2},
{TGSI_OPCODE_MUL, "MUL", 2},
{TGSI_OPCODE_NOP, "SUB", 2},
{TGSI_OPCODE_DP3, "DOT3", 2},
{TGSI_OPCODE_DP4, "DOT4", 2},
{TGSI_OPCODE_MAD, "MAD", 3},
{TGSI_OPCODE_LRP, "LERP", 3},
{TGSI_OPCODE_NOP, "CND", 3},
{TGSI_OPCODE_NOP, "CND0", 3},
{TGSI_OPCODE_NOP, "DOT2_ADD", 3}
};
static struct ureg_dst
get_temp(struct st_translate *t, unsigned index)
{
if (ureg_dst_is_undef(t->temps[index]))
t->temps[index] = ureg_DECL_temporary(t->ureg);
return t->temps[index];
}
static struct ureg_src
apply_swizzle(struct st_translate *t,
struct ureg_src src, GLuint swizzle)
{
if (swizzle == GL_SWIZZLE_STR_ATI) {
return src;
} else if (swizzle == GL_SWIZZLE_STQ_ATI) {
return ureg_swizzle(src,
TGSI_SWIZZLE_X,
TGSI_SWIZZLE_Y,
TGSI_SWIZZLE_W,
TGSI_SWIZZLE_Z);
} else {
struct ureg_dst tmp[2];
struct ureg_src imm[3];
tmp[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI);
tmp[1] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI + 1);
imm[0] = src;
imm[1] = ureg_imm4f(t->ureg, 1.0f, 1.0f, 0.0f, 0.0f);
imm[2] = ureg_imm4f(t->ureg, 0.0f, 0.0f, 1.0f, 1.0f);
ureg_insn(t->ureg, TGSI_OPCODE_MAD, &tmp[0], 1, imm, 3, 0);
if (swizzle == GL_SWIZZLE_STR_DR_ATI) {
imm[0] = ureg_scalar(src, TGSI_SWIZZLE_Z);
} else {
imm[0] = ureg_scalar(src, TGSI_SWIZZLE_W);
}
ureg_insn(t->ureg, TGSI_OPCODE_RCP, &tmp[1], 1, &imm[0], 1, 0);
imm[0] = ureg_src(tmp[0]);
imm[1] = ureg_src(tmp[1]);
ureg_insn(t->ureg, TGSI_OPCODE_MUL, &tmp[0], 1, imm, 2, 0);
return ureg_src(tmp[0]);
}
}
static struct ureg_src
get_source(struct st_translate *t, GLuint src_type)
{
if (src_type >= GL_REG_0_ATI && src_type <= GL_REG_5_ATI) {
if (t->regs_written[t->current_pass][src_type - GL_REG_0_ATI]) {
return ureg_src(get_temp(t, src_type - GL_REG_0_ATI));
} else {
return ureg_imm1f(t->ureg, 0.0f);
}
} else if (src_type >= GL_CON_0_ATI && src_type <= GL_CON_7_ATI) {
return t->constants[src_type - GL_CON_0_ATI];
} else if (src_type == GL_ZERO) {
return ureg_imm1f(t->ureg, 0.0f);
} else if (src_type == GL_ONE) {
return ureg_imm1f(t->ureg, 1.0f);
} else if (src_type == GL_PRIMARY_COLOR_ARB) {
return t->inputs[t->inputMapping[VARYING_SLOT_COL0]];
} else if (src_type == GL_SECONDARY_INTERPOLATOR_ATI) {
return t->inputs[t->inputMapping[VARYING_SLOT_COL1]];
} else {
/* frontend prevents this */
unreachable("unknown source");
}
}
static struct ureg_src
prepare_argument(struct st_translate *t, const unsigned argId,
const struct atifragshader_src_register *srcReg)
{
struct ureg_src src = get_source(t, srcReg->Index);
struct ureg_dst arg = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI + argId);
switch (srcReg->argRep) {
case GL_NONE:
break;
case GL_RED:
src = ureg_scalar(src, TGSI_SWIZZLE_X);
break;
case GL_GREEN:
src = ureg_scalar(src, TGSI_SWIZZLE_Y);
break;
case GL_BLUE:
src = ureg_scalar(src, TGSI_SWIZZLE_Z);
break;
case GL_ALPHA:
src = ureg_scalar(src, TGSI_SWIZZLE_W);
break;
}
ureg_insn(t->ureg, TGSI_OPCODE_MOV, &arg, 1, &src, 1, 0);
if (srcReg->argMod & GL_COMP_BIT_ATI) {
struct ureg_src modsrc[2];
modsrc[0] = ureg_imm1f(t->ureg, 1.0f);
modsrc[1] = ureg_negate(ureg_src(arg));
ureg_insn(t->ureg, TGSI_OPCODE_ADD, &arg, 1, modsrc, 2, 0);
}
if (srcReg->argMod & GL_BIAS_BIT_ATI) {
struct ureg_src modsrc[2];
modsrc[0] = ureg_src(arg);
modsrc[1] = ureg_imm1f(t->ureg, -0.5f);
ureg_insn(t->ureg, TGSI_OPCODE_ADD, &arg, 1, modsrc, 2, 0);
}
if (srcReg->argMod & GL_2X_BIT_ATI) {
struct ureg_src modsrc[2];
modsrc[0] = ureg_src(arg);
modsrc[1] = ureg_src(arg);
ureg_insn(t->ureg, TGSI_OPCODE_ADD, &arg, 1, modsrc, 2, 0);
}
if (srcReg->argMod & GL_NEGATE_BIT_ATI) {
struct ureg_src modsrc[2];
modsrc[0] = ureg_src(arg);
modsrc[1] = ureg_imm1f(t->ureg, -1.0f);
ureg_insn(t->ureg, TGSI_OPCODE_MUL, &arg, 1, modsrc, 2, 0);
}
return ureg_src(arg);
}
/* These instructions need special treatment */
static void
emit_special_inst(struct st_translate *t, const struct instruction_desc *desc,
struct ureg_dst *dst, struct ureg_src *args, unsigned argcount)
{
struct ureg_dst tmp[1];
struct ureg_src src[3];
if (!strcmp(desc->name, "SUB")) {
ureg_ADD(t->ureg, *dst, args[0], ureg_negate(args[1]));
} else if (!strcmp(desc->name, "CND")) {
tmp[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI + 2); /* re-purpose a3 */
src[0] = ureg_imm1f(t->ureg, 0.5f);
src[1] = ureg_negate(args[2]);
ureg_insn(t->ureg, TGSI_OPCODE_ADD, tmp, 1, src, 2, 0);
src[0] = ureg_src(tmp[0]);
src[1] = args[0];
src[2] = args[1];
ureg_insn(t->ureg, TGSI_OPCODE_CMP, dst, 1, src, 3, 0);
} else if (!strcmp(desc->name, "CND0")) {
src[0] = args[2];
src[1] = args[1];
src[2] = args[0];
ureg_insn(t->ureg, TGSI_OPCODE_CMP, dst, 1, src, 3, 0);
} else if (!strcmp(desc->name, "DOT2_ADD")) {
tmp[0] = get_temp(t, MAX_NUM_FRAGMENT_REGISTERS_ATI); /* re-purpose a1 */
src[0] = args[0];
src[1] = args[1];
ureg_insn(t->ureg, TGSI_OPCODE_DP2, tmp, 1, src, 2, 0);
src[0] = ureg_src(tmp[0]);
src[1] = ureg_scalar(args[2], TGSI_SWIZZLE_Z);
ureg_insn(t->ureg, TGSI_OPCODE_ADD, dst, 1, src, 2, 0);
}
}
static void
emit_arith_inst(struct st_translate *t,
const struct instruction_desc *desc,
struct ureg_dst *dst, struct ureg_src *args, unsigned argcount)
{
if (desc->TGSI_opcode == TGSI_OPCODE_NOP) {
emit_special_inst(t, desc, dst, args, argcount);
return;
}
ureg_insn(t->ureg, desc->TGSI_opcode, dst, 1, args, argcount, 0);
}
static void
emit_dstmod(struct st_translate *t,
struct ureg_dst dst, GLuint dstMod)
{
float imm;
struct ureg_src src[3];
GLuint scale = dstMod & ~GL_SATURATE_BIT_ATI;
if (dstMod == GL_NONE) {
return;
}
switch (scale) {
case GL_2X_BIT_ATI:
imm = 2.0f;
break;
case GL_4X_BIT_ATI:
imm = 4.0f;
break;
case GL_8X_BIT_ATI:
imm = 8.0f;
break;
case GL_HALF_BIT_ATI:
imm = 0.5f;
break;
case GL_QUARTER_BIT_ATI:
imm = 0.25f;
break;
case GL_EIGHTH_BIT_ATI:
imm = 0.125f;
break;
default:
imm = 1.0f;
}
src[0] = ureg_src(dst);
src[1] = ureg_imm1f(t->ureg, imm);
if (dstMod & GL_SATURATE_BIT_ATI) {
dst = ureg_saturate(dst);
}
ureg_insn(t->ureg, TGSI_OPCODE_MUL, &dst, 1, src, 2, 0);
}
/**
* Compile one setup instruction to TGSI instructions.
*/
static void
compile_setupinst(struct st_translate *t,
const unsigned r,
const struct atifs_setupinst *texinst)
{
struct ureg_dst dst[1];
struct ureg_src src[2];
if (!texinst->Opcode)
return;
dst[0] = get_temp(t, r);
GLuint pass_tex = texinst->src;
if (pass_tex >= GL_TEXTURE0_ARB && pass_tex <= GL_TEXTURE7_ARB) {
unsigned attr = pass_tex - GL_TEXTURE0_ARB + VARYING_SLOT_TEX0;
src[0] = t->inputs[t->inputMapping[attr]];
} else if (pass_tex >= GL_REG_0_ATI && pass_tex <= GL_REG_5_ATI) {
unsigned reg = pass_tex - GL_REG_0_ATI;
/* the frontend already validated that REG is only allowed in second pass */
if (t->regs_written[0][reg]) {
src[0] = ureg_src(t->temps[reg]);
} else {
src[0] = ureg_imm1f(t->ureg, 0.0f);
}
}
src[0] = apply_swizzle(t, src[0], texinst->swizzle);
if (texinst->Opcode == ATI_FRAGMENT_SHADER_SAMPLE_OP) {
/* by default texture and sampler indexes are the same */
src[1] = t->samplers[r];
/* the texture target is still unknown, it will be fixed in the draw call */
ureg_tex_insn(t->ureg, TGSI_OPCODE_TEX, dst, 1, TGSI_TEXTURE_2D,
TGSI_RETURN_TYPE_FLOAT, NULL, 0, src, 2);
} else if (texinst->Opcode == ATI_FRAGMENT_SHADER_PASS_OP) {
ureg_insn(t->ureg, TGSI_OPCODE_MOV, dst, 1, src, 1, 0);
}
t->regs_written[t->current_pass][r] = true;
}
/**
* Compile one arithmetic operation COLOR&ALPHA pair into TGSI instructions.
*/
static void
compile_instruction(struct st_translate *t,
const struct atifs_instruction *inst)
{
unsigned optype;
for (optype = 0; optype < 2; optype++) { /* color, alpha */
const struct instruction_desc *desc;
struct ureg_dst dst[1];
struct ureg_src args[3]; /* arguments for the main operation */
unsigned arg;
unsigned dstreg = inst->DstReg[optype].Index - GL_REG_0_ATI;
if (!inst->Opcode[optype])
continue;
desc = &inst_desc[inst->Opcode[optype] - GL_MOV_ATI];
/* prepare the arguments */
for (arg = 0; arg < desc->arg_count; arg++) {
if (arg >= inst->ArgCount[optype]) {
_mesa_warning(0, "Using 0 for missing argument %d of %s\n",
arg, desc->name);
args[arg] = ureg_imm1f(t->ureg, 0.0f);
} else {
args[arg] = prepare_argument(t, arg,
&inst->SrcReg[optype][arg]);
}
}
/* prepare dst */
dst[0] = get_temp(t, dstreg);
if (optype) {
dst[0] = ureg_writemask(dst[0], TGSI_WRITEMASK_W);
} else {
GLuint dstMask = inst->DstReg[optype].dstMask;
if (dstMask == GL_NONE) {
dst[0] = ureg_writemask(dst[0], TGSI_WRITEMASK_XYZ);
} else {
dst[0] = ureg_writemask(dst[0], dstMask); /* the enum values match */
}
}
/* emit the main instruction */
emit_arith_inst(t, desc, dst, args, arg);
emit_dstmod(t, *dst, inst->DstReg[optype].dstMod);
t->regs_written[t->current_pass][dstreg] = true;
}
}
static void
finalize_shader(struct st_translate *t, unsigned numPasses)
{
struct ureg_dst dst[1] = { { 0 } };
struct ureg_src src[1] = { { 0 } };
if (t->regs_written[numPasses-1][0]) {
/* copy the result into the OUT slot */
dst[0] = t->outputs[t->outputMapping[FRAG_RESULT_COLOR]];
src[0] = ureg_src(t->temps[0]);
ureg_insn(t->ureg, TGSI_OPCODE_MOV, dst, 1, src, 1, 0);
}
/* signal the end of the program */
ureg_insn(t->ureg, TGSI_OPCODE_END, dst, 0, src, 0, 0);
}
/**
* Called when a new variant is needed, we need to translate
* the ATI fragment shader to TGSI
*/
enum pipe_error
st_translate_atifs_program(
struct ureg_program *ureg,
struct ati_fragment_shader *atifs,
struct gl_program *program,
GLuint numInputs,
const ubyte inputMapping[],
const ubyte inputSemanticName[],
const ubyte inputSemanticIndex[],
const ubyte interpMode[],
GLuint numOutputs,
const ubyte outputMapping[],
const ubyte outputSemanticName[],
const ubyte outputSemanticIndex[])
{
enum pipe_error ret = PIPE_OK;
unsigned pass, i, r;
struct st_translate translate, *t;
t = &translate;
memset(t, 0, sizeof *t);
t->inputMapping = inputMapping;
t->outputMapping = outputMapping;
t->ureg = ureg;
t->atifs = atifs;
/*
* Declare input attributes.
*/
for (i = 0; i < numInputs; i++) {
t->inputs[i] = ureg_DECL_fs_input(ureg,
inputSemanticName[i],
inputSemanticIndex[i],
interpMode[i]);
}
/*
* Declare output attributes:
* we always have numOutputs=1 and it's FRAG_RESULT_COLOR
*/
t->outputs[0] = ureg_DECL_output(ureg,
TGSI_SEMANTIC_COLOR,
outputSemanticIndex[0]);
/* Emit constants and immediates. Mesa uses a single index space
* for these, so we put all the translated regs in t->constants.
*/
if (program->Parameters) {
t->constants = calloc(program->Parameters->NumParameters,
sizeof t->constants[0]);
if (t->constants == NULL) {
ret = PIPE_ERROR_OUT_OF_MEMORY;
goto out;
}
for (i = 0; i < program->Parameters->NumParameters; i++) {
switch (program->Parameters->Parameters[i].Type) {
case PROGRAM_STATE_VAR:
case PROGRAM_UNIFORM:
t->constants[i] = ureg_DECL_constant(ureg, i);
break;
case PROGRAM_CONSTANT:
t->constants[i] =
ureg_DECL_immediate(ureg,
(const float*)program->Parameters->ParameterValues[i],
4);
break;
default:
break;
}
}
}
/* texture samplers */
for (i = 0; i < MAX_NUM_FRAGMENT_REGISTERS_ATI; i++) {
if (program->SamplersUsed & (1 << i)) {
t->samplers[i] = ureg_DECL_sampler(ureg, i);
/* the texture target is still unknown, it will be fixed in the draw call */
ureg_DECL_sampler_view(ureg, i, TGSI_TEXTURE_2D,
TGSI_RETURN_TYPE_FLOAT,
TGSI_RETURN_TYPE_FLOAT,
TGSI_RETURN_TYPE_FLOAT,
TGSI_RETURN_TYPE_FLOAT);
}
}
/* emit instructions */
for (pass = 0; pass < atifs->NumPasses; pass++) {
t->current_pass = pass;
for (r = 0; r < MAX_NUM_FRAGMENT_REGISTERS_ATI; r++) {
struct atifs_setupinst *texinst = &atifs->SetupInst[pass][r];
compile_setupinst(t, r, texinst);
}
for (i = 0; i < atifs->numArithInstr[pass]; i++) {
struct atifs_instruction *inst = &atifs->Instructions[pass][i];
compile_instruction(t, inst);
}
}
finalize_shader(t, atifs->NumPasses);
out:
free(t->constants);
if (t->error) {
debug_printf("%s: translate error flag set\n", __func__);
}
return ret;
}
/**
* Called in ProgramStringNotify, we need to fill the metadata of the
* gl_program attached to the ati_fragment_shader
*/
void
st_init_atifs_prog(struct gl_context *ctx, struct gl_program *prog)
{
/* we know this is st_fragment_program, because of st_new_ati_fs() */
struct st_fragment_program *stfp = (struct st_fragment_program *) prog;
struct ati_fragment_shader *atifs = stfp->ati_fs;
unsigned pass, i, r, optype, arg;
static const gl_state_index fog_params_state[STATE_LENGTH] =
{STATE_INTERNAL, STATE_FOG_PARAMS_OPTIMIZED, 0, 0, 0};
static const gl_state_index fog_color[STATE_LENGTH] =
{STATE_FOG_COLOR, 0, 0, 0, 0};
prog->info.inputs_read = 0;
prog->info.outputs_written = BITFIELD64_BIT(FRAG_RESULT_COLOR);
prog->SamplersUsed = 0;
prog->Parameters = _mesa_new_parameter_list();
/* fill in inputs_read, SamplersUsed, TexturesUsed */
for (pass = 0; pass < atifs->NumPasses; pass++) {
for (r = 0; r < MAX_NUM_FRAGMENT_REGISTERS_ATI; r++) {
struct atifs_setupinst *texinst = &atifs->SetupInst[pass][r];
GLuint pass_tex = texinst->src;
if (texinst->Opcode == ATI_FRAGMENT_SHADER_SAMPLE_OP) {
/* mark which texcoords are used */
prog->info.inputs_read |= BITFIELD64_BIT(VARYING_SLOT_TEX0 + pass_tex - GL_TEXTURE0_ARB);
/* by default there is 1:1 mapping between samplers and textures */
prog->SamplersUsed |= (1 << r);
/* the target is unknown here, it will be fixed in the draw call */
prog->TexturesUsed[r] = TEXTURE_2D_BIT;
} else if (texinst->Opcode == ATI_FRAGMENT_SHADER_PASS_OP) {
if (pass_tex >= GL_TEXTURE0_ARB && pass_tex <= GL_TEXTURE7_ARB) {
prog->info.inputs_read |= BITFIELD64_BIT(VARYING_SLOT_TEX0 + pass_tex - GL_TEXTURE0_ARB);
}
}
}
}
for (pass = 0; pass < atifs->NumPasses; pass++) {
for (i = 0; i < atifs->numArithInstr[pass]; i++) {
struct atifs_instruction *inst = &atifs->Instructions[pass][i];
for (optype = 0; optype < 2; optype++) { /* color, alpha */
if (inst->Opcode[optype]) {
for (arg = 0; arg < inst->ArgCount[optype]; arg++) {
GLint index = inst->SrcReg[optype][arg].Index;
if (index == GL_PRIMARY_COLOR_EXT) {
prog->info.inputs_read |= BITFIELD64_BIT(VARYING_SLOT_COL0);
} else if (index == GL_SECONDARY_INTERPOLATOR_ATI) {
/* note: ATI_fragment_shader.txt never specifies what
* GL_SECONDARY_INTERPOLATOR_ATI is, swrast uses
* VARYING_SLOT_COL1 for this input */
prog->info.inputs_read |= BITFIELD64_BIT(VARYING_SLOT_COL1);
}
}
}
}
}
}
/* we may need fog */
prog->info.inputs_read |= BITFIELD64_BIT(VARYING_SLOT_FOGC);
/* we always have the ATI_fs constants, and the fog params */
for (i = 0; i < MAX_NUM_FRAGMENT_CONSTANTS_ATI; i++) {
_mesa_add_parameter(prog->Parameters, PROGRAM_UNIFORM,
NULL, 4, GL_FLOAT, NULL, NULL);
}
_mesa_add_state_reference(prog->Parameters, fog_params_state);
_mesa_add_state_reference(prog->Parameters, fog_color);
}
struct tgsi_atifs_transform {
struct tgsi_transform_context base;
struct tgsi_shader_info info;
const struct st_fp_variant_key *key;
bool first_instruction_emitted;
unsigned fog_factor_temp;
};
static inline struct tgsi_atifs_transform *
tgsi_atifs_transform(struct tgsi_transform_context *tctx)
{
return (struct tgsi_atifs_transform *)tctx;
}
/* copied from st_cb_drawpixels_shader.c */
static void
set_src(struct tgsi_full_instruction *inst, unsigned i, unsigned file, unsigned index,
unsigned x, unsigned y, unsigned z, unsigned w)
{
inst->Src[i].Register.File = file;
inst->Src[i].Register.Index = index;
inst->Src[i].Register.SwizzleX = x;
inst->Src[i].Register.SwizzleY = y;
inst->Src[i].Register.SwizzleZ = z;
inst->Src[i].Register.SwizzleW = w;
if (file == TGSI_FILE_CONSTANT) {
inst->Src[i].Register.Dimension = 1;
inst->Src[i].Dimension.Index = 0;
}
}
#define SET_SRC(inst, i, file, index, x, y, z, w) \
set_src(inst, i, file, index, TGSI_SWIZZLE_##x, TGSI_SWIZZLE_##y, \
TGSI_SWIZZLE_##z, TGSI_SWIZZLE_##w)
static void
transform_decl(struct tgsi_transform_context *tctx,
struct tgsi_full_declaration *decl)
{
struct tgsi_atifs_transform *ctx = tgsi_atifs_transform(tctx);
if (decl->Declaration.File == TGSI_FILE_SAMPLER_VIEW) {
/* fix texture target */
unsigned newtarget = ctx->key->texture_targets[decl->Range.First];
if (newtarget)
decl->SamplerView.Resource = newtarget;
}
tctx->emit_declaration(tctx, decl);
}
static void
transform_instr(struct tgsi_transform_context *tctx,
struct tgsi_full_instruction *current_inst)
{
struct tgsi_atifs_transform *ctx = tgsi_atifs_transform(tctx);
if (ctx->first_instruction_emitted)
goto transform_inst;
ctx->first_instruction_emitted = true;
if (ctx->key->fog) {
/* add a new temp for the fog factor */
ctx->fog_factor_temp = ctx->info.file_max[TGSI_FILE_TEMPORARY] + 1;
tgsi_transform_temp_decl(tctx, ctx->fog_factor_temp);
}
transform_inst:
if (current_inst->Instruction.Opcode == TGSI_OPCODE_TEX) {
/* fix texture target */
unsigned newtarget = ctx->key->texture_targets[current_inst->Src[1].Register.Index];
if (newtarget)
current_inst->Texture.Texture = newtarget;
} else if (ctx->key->fog && current_inst->Instruction.Opcode == TGSI_OPCODE_MOV &&
current_inst->Dst[0].Register.File == TGSI_FILE_OUTPUT) {
struct tgsi_full_instruction inst;
unsigned i;
int fogc_index = -1;
int reg0_index = current_inst->Src[0].Register.Index;
/* find FOGC input */
for (i = 0; i < ctx->info.num_inputs; i++) {
if (ctx->info.input_semantic_name[i] == TGSI_SEMANTIC_FOG) {
fogc_index = i;
break;
}
}
if (fogc_index < 0) {
/* should never be reached, because fog coord input is always declared */
tctx->emit_instruction(tctx, current_inst);
return;
}
/* compute the 1 component fog factor f */
if (ctx->key->fog == FOG_LINEAR) {
/* LINEAR formula: f = (end - z) / (end - start)
* with optimized parameters:
* f = MAD(fogcoord, oparams.x, oparams.y)
*/
inst = tgsi_default_full_instruction();
inst.Instruction.Opcode = TGSI_OPCODE_MAD;
inst.Instruction.NumDstRegs = 1;
inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
inst.Dst[0].Register.Index = ctx->fog_factor_temp;
inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
inst.Instruction.NumSrcRegs = 3;
SET_SRC(&inst, 0, TGSI_FILE_INPUT, fogc_index, X, Y, Z, W);
SET_SRC(&inst, 1, TGSI_FILE_CONSTANT, MAX_NUM_FRAGMENT_CONSTANTS_ATI, X, X, X, X);
SET_SRC(&inst, 2, TGSI_FILE_CONSTANT, MAX_NUM_FRAGMENT_CONSTANTS_ATI, Y, Y, Y, Y);
tctx->emit_instruction(tctx, &inst);
} else if (ctx->key->fog == FOG_EXP) {
/* EXP formula: f = exp(-dens * z)
* with optimized parameters:
* f = MUL(fogcoord, oparams.z); f= EX2(-f)
*/
inst = tgsi_default_full_instruction();
inst.Instruction.Opcode = TGSI_OPCODE_MUL;
inst.Instruction.NumDstRegs = 1;
inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
inst.Dst[0].Register.Index = ctx->fog_factor_temp;
inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
inst.Instruction.NumSrcRegs = 2;
SET_SRC(&inst, 0, TGSI_FILE_INPUT, fogc_index, X, Y, Z, W);
SET_SRC(&inst, 1, TGSI_FILE_CONSTANT, MAX_NUM_FRAGMENT_CONSTANTS_ATI, Z, Z, Z, Z);
tctx->emit_instruction(tctx, &inst);
inst = tgsi_default_full_instruction();
inst.Instruction.Opcode = TGSI_OPCODE_EX2;
inst.Instruction.NumDstRegs = 1;
inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
inst.Dst[0].Register.Index = ctx->fog_factor_temp;
inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
inst.Instruction.NumSrcRegs = 1;
SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, Y, Z, W);
inst.Src[0].Register.Negate = 1;
tctx->emit_instruction(tctx, &inst);
} else if (ctx->key->fog == FOG_EXP2) {
/* EXP2 formula: f = exp(-(dens * z)^2)
* with optimized parameters:
* f = MUL(fogcoord, oparams.w); f=MUL(f, f); f= EX2(-f)
*/
inst = tgsi_default_full_instruction();
inst.Instruction.Opcode = TGSI_OPCODE_MUL;
inst.Instruction.NumDstRegs = 1;
inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
inst.Dst[0].Register.Index = ctx->fog_factor_temp;
inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
inst.Instruction.NumSrcRegs = 2;
SET_SRC(&inst, 0, TGSI_FILE_INPUT, fogc_index, X, Y, Z, W);
SET_SRC(&inst, 1, TGSI_FILE_CONSTANT, MAX_NUM_FRAGMENT_CONSTANTS_ATI, W, W, W, W);
tctx->emit_instruction(tctx, &inst);
inst = tgsi_default_full_instruction();
inst.Instruction.Opcode = TGSI_OPCODE_MUL;
inst.Instruction.NumDstRegs = 1;
inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
inst.Dst[0].Register.Index = ctx->fog_factor_temp;
inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
inst.Instruction.NumSrcRegs = 2;
SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, Y, Z, W);
SET_SRC(&inst, 1, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, Y, Z, W);
tctx->emit_instruction(tctx, &inst);
inst = tgsi_default_full_instruction();
inst.Instruction.Opcode = TGSI_OPCODE_EX2;
inst.Instruction.NumDstRegs = 1;
inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
inst.Dst[0].Register.Index = ctx->fog_factor_temp;
inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
inst.Instruction.NumSrcRegs = 1;
SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, Y, Z, W);
inst.Src[0].Register.Negate ^= 1;
tctx->emit_instruction(tctx, &inst);
}
/* f = saturate(f) */
inst = tgsi_default_full_instruction();
inst.Instruction.Opcode = TGSI_OPCODE_MOV;
inst.Instruction.NumDstRegs = 1;
inst.Instruction.Saturate = 1;
inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
inst.Dst[0].Register.Index = ctx->fog_factor_temp;
inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
inst.Instruction.NumSrcRegs = 1;
SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, Y, Z, W);
tctx->emit_instruction(tctx, &inst);
/* REG0 = LRP(f, REG0, fogcolor) */
inst = tgsi_default_full_instruction();
inst.Instruction.Opcode = TGSI_OPCODE_LRP;
inst.Instruction.NumDstRegs = 1;
inst.Dst[0].Register.File = TGSI_FILE_TEMPORARY;
inst.Dst[0].Register.Index = reg0_index;
inst.Dst[0].Register.WriteMask = TGSI_WRITEMASK_XYZW;
inst.Instruction.NumSrcRegs = 3;
SET_SRC(&inst, 0, TGSI_FILE_TEMPORARY, ctx->fog_factor_temp, X, X, X, Y);
SET_SRC(&inst, 1, TGSI_FILE_TEMPORARY, reg0_index, X, Y, Z, W);
SET_SRC(&inst, 2, TGSI_FILE_CONSTANT, MAX_NUM_FRAGMENT_CONSTANTS_ATI + 1, X, Y, Z, W);
tctx->emit_instruction(tctx, &inst);
}
tctx->emit_instruction(tctx, current_inst);
}
/*
* A post-process step in the draw call to fix texture targets and
* insert code for fog.
*/
const struct tgsi_token *
st_fixup_atifs(const struct tgsi_token *tokens,
const struct st_fp_variant_key *key)
{
struct tgsi_atifs_transform ctx;
struct tgsi_token *newtoks;
int newlen;
memset(&ctx, 0, sizeof(ctx));
ctx.base.transform_declaration = transform_decl;
ctx.base.transform_instruction = transform_instr;
ctx.key = key;
tgsi_scan_shader(tokens, &ctx.info);
newlen = tgsi_num_tokens(tokens) + 30;
newtoks = tgsi_alloc_tokens(newlen);
if (!newtoks)
return NULL;
tgsi_transform_shader(tokens, newtoks, newlen, &ctx.base);
return newtoks;
}