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Shader Recomnpiler: implement textuzreGrad 3D emulation constant propagation

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This commit is contained in:
Fernando Sahmkow 2023-08-18 18:30:31 +02:00 committed by Liam
parent ae1421265a
commit c03f0b3c89
8 changed files with 261 additions and 11 deletions
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23
src/shader_recompiler/backend/glasm/emit_glasm_image.cpp
View file

@ -558,12 +558,15 @@ void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
const IR::Value& coord, const IR::Value& derivatives,
const IR::Value& offset, const IR::Value& lod_clamp) {
const auto info{inst.Flags<IR::TextureInstInfo>()};
ScopedRegister dpdx, dpdy;
ScopedRegister dpdx, dpdy, coords;
const bool multi_component{info.num_derivates > 1 || info.has_lod_clamp};
if (multi_component) {
// Allocate this early to avoid aliasing other registers
dpdx = ScopedRegister{ctx.reg_alloc};
dpdy = ScopedRegister{ctx.reg_alloc};
if (info.num_derivates >= 3) {
coords = ScopedRegister{ctx.reg_alloc};
}
}
const auto sparse_inst{PrepareSparse(inst)};
const std::string_view sparse_mod{sparse_inst ? ".SPARSE" : ""};
@ -580,15 +583,27 @@ void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
"MOV.F {}.y,{}.w;",
dpdx.reg, derivatives_vec, dpdx.reg, derivatives_vec, dpdy.reg, derivatives_vec,
dpdy.reg, derivatives_vec);
Register final_coord;
if (info.num_derivates >= 3) {
ctx.Add("MOV.F {}.z,{}.x;"
"MOV.F {}.z,{}.y;",
dpdx.reg, coord_vec, dpdy.reg, coord_vec);
ctx.Add("MOV.F {}.x,0;"
"MOV.F {}.y,0;",
"MOV.F {}.z,0;", coords.reg, coords.reg, coords.reg);
final_coord = coords.reg;
} else {
final_coord = coord_vec;
}
if (info.has_lod_clamp) {
const ScalarF32 lod_clamp_value{ctx.reg_alloc.Consume(lod_clamp)};
ctx.Add("MOV.F {}.w,{};"
"TXD.F.LODCLAMP{} {},{},{},{},{},{}{};",
dpdy.reg, lod_clamp_value, sparse_mod, ret, coord_vec, dpdx.reg, dpdy.reg,
dpdy.reg, lod_clamp_value, sparse_mod, ret, final_coord, dpdx.reg, dpdy.reg,
texture, type, offset_vec);
} else {
ctx.Add("TXD.F{} {},{},{},{},{},{}{};", sparse_mod, ret, coord_vec, dpdx.reg, dpdy.reg,
texture, type, offset_vec);
ctx.Add("TXD.F{} {},{},{},{},{},{}{};", sparse_mod, ret, final_coord, dpdx.reg,
dpdy.reg, texture, type, offset_vec);
}
} else {
ctx.Add("TXD.F{} {},{},{}.x,{}.y,{},{}{};", sparse_mod, ret, coord_vec, derivatives_vec,

8
src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
View file

@ -548,7 +548,7 @@ void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
if (sparse_inst) {
throw NotImplementedException("EmitImageGradient Sparse");
}
if (!offset.IsEmpty()) {
if (!offset.IsEmpty() && info.num_derivates <= 2) {
throw NotImplementedException("EmitImageGradient offset");
}
const auto texture{Texture(ctx, info, index)};
@ -556,6 +556,12 @@ void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
const bool multi_component{info.num_derivates > 1 || info.has_lod_clamp};
const auto derivatives_vec{ctx.var_alloc.Consume(derivatives)};
if (multi_component) {
if (info.num_derivates >= 3) {
const auto offset_vec{ctx.var_alloc.Consume(offset)};
ctx.Add("{}=textureGrad({},{},vec3({}.xz, {}.x),vec3({}.yz, {}.y));", texel, texture,
coords, derivatives_vec, offset_vec, derivatives_vec, offset_vec);
return;
}
ctx.Add("{}=textureGrad({},{},vec2({}.xz),vec2({}.yz));", texel, texture, coords,
derivatives_vec, derivatives_vec);
} else {

1
src/shader_recompiler/frontend/ir/modifiers.h
View file

@ -42,6 +42,7 @@ union TextureInstInfo {
BitField<23, 2, u32> gather_component;
BitField<25, 2, u32> num_derivates;
BitField<27, 3, ImageFormat> image_format;
BitField<30, 1, u32> ndv_is_active;
};
static_assert(sizeof(TextureInstInfo) <= sizeof(u32));

2
src/shader_recompiler/frontend/maxwell/translate/impl/floating_point_swizzled_add.cpp
View file

@ -19,7 +19,7 @@ void TranslatorVisitor::FSWZADD(u64 insn) {
} const fswzadd{insn};
if (fswzadd.ndv != 0) {
throw NotImplementedException("FSWZADD NDV");
LOG_WARNING(Shader, "(STUBBED) FSWZADD - NDV mode");
}
const IR::F32 src_a{GetFloatReg8(insn)};

6
src/shader_recompiler/frontend/maxwell/translate/impl/move_register.cpp
View file

@ -16,8 +16,10 @@ void MOV(TranslatorVisitor& v, u64 insn, const IR::U32& src, bool is_mov32i = fa
BitField<12, 4, u64> mov32i_mask;
} const mov{insn};
if ((is_mov32i ? mov.mov32i_mask : mov.mask) != 0xf) {
throw NotImplementedException("Non-full move mask");
u64 mask = is_mov32i ? mov.mov32i_mask : mov.mask;
if (mask != 0xf && mask != 0x1) {
LOG_WARNING(Shader, "(STUBBED) Masked Mov");
return;
}
v.X(mov.dest_reg, src);
}

4
src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
View file

@ -209,7 +209,7 @@ void TranslatorVisitor::R2B(u64) {
}
void TranslatorVisitor::RAM(u64) {
ThrowNotImplemented(Opcode::RAM);
LOG_WARNING(Shader, "(STUBBED) RAM Instruction");
}
void TranslatorVisitor::RET(u64) {
@ -221,7 +221,7 @@ void TranslatorVisitor::RTT(u64) {
}
void TranslatorVisitor::SAM(u64) {
ThrowNotImplemented(Opcode::SAM);
LOG_WARNING(Shader, "(STUBBED) SAM Instruction");
}
void TranslatorVisitor::SETCRSPTR(u64) {

1
src/shader_recompiler/frontend/maxwell/translate/impl/texture_fetch.cpp
View file

@ -172,6 +172,7 @@ void Impl(TranslatorVisitor& v, u64 insn, bool aoffi, Blod blod, bool lc,
info.is_depth.Assign(tex.dc != 0 ? 1 : 0);
info.has_bias.Assign(blod == Blod::LB || blod == Blod::LBA ? 1 : 0);
info.has_lod_clamp.Assign(lc ? 1 : 0);
info.ndv_is_active.Assign(tex.ndv != 0 ? 1 : 0);
const IR::Value sample{[&]() -> IR::Value {
if (tex.dc == 0) {

227
src/shader_recompiler/ir_opt/constant_propagation_pass.cpp
View file

@ -10,6 +10,7 @@
#include "shader_recompiler/environment.h"
#include "shader_recompiler/exception.h"
#include "shader_recompiler/frontend/ir/ir_emitter.h"
#include "shader_recompiler/frontend/ir/modifiers.h"
#include "shader_recompiler/frontend/ir/value.h"
#include "shader_recompiler/ir_opt/passes.h"
@ -410,7 +411,49 @@ void FoldSelect(IR::Inst& inst) {
}
}
void FoldFPAdd32(IR::Inst& inst) {
if (FoldWhenAllImmediates(inst, [](f32 a, f32 b) { return a + b; })) {
return;
}
const IR::Value lhs_value{inst.Arg(0)};
const IR::Value rhs_value{inst.Arg(1)};
const auto check_neutral = [](const IR::Value& one_operand) {
return one_operand.IsImmediate() && std::abs(one_operand.F32()) == 0.0f;
};
if (check_neutral(lhs_value)) {
inst.ReplaceUsesWith(rhs_value);
}
if (check_neutral(rhs_value)) {
inst.ReplaceUsesWith(lhs_value);
}
}
bool FoldDerivateYFromCorrection(IR::Inst& inst) {
const IR::Value lhs_value{inst.Arg(0)};
const IR::Value rhs_value{inst.Arg(1)};
IR::Inst* const lhs_op{lhs_value.InstRecursive()};
IR::Inst* const rhs_op{rhs_value.InstRecursive()};
if (lhs_op->GetOpcode() == IR::Opcode::YDirection) {
if (rhs_op->GetOpcode() != IR::Opcode::DPdyFine) {
return false;
}
inst.ReplaceUsesWith(rhs_value);
return true;
}
if (rhs_op->GetOpcode() != IR::Opcode::YDirection) {
return false;
}
if (lhs_op->GetOpcode() != IR::Opcode::DPdyFine) {
return false;
}
inst.ReplaceUsesWith(lhs_value);
return true;
}
void FoldFPMul32(IR::Inst& inst) {
if (FoldWhenAllImmediates(inst, [](f32 a, f32 b) { return a * b; })) {
return;
}
const auto control{inst.Flags<IR::FpControl>()};
if (control.no_contraction) {
return;
@ -421,6 +464,9 @@ void FoldFPMul32(IR::Inst& inst) {
if (lhs_value.IsImmediate() || rhs_value.IsImmediate()) {
return;
}
if (FoldDerivateYFromCorrection(inst)) {
return;
}
IR::Inst* const lhs_op{lhs_value.InstRecursive()};
IR::Inst* const rhs_op{rhs_value.InstRecursive()};
if (lhs_op->GetOpcode() != IR::Opcode::FPMul32 ||
@ -622,7 +668,12 @@ void FoldFSwizzleAdd(IR::Block& block, IR::Inst& inst) {
}
const IR::Value value_3{GetThroughCast(inst2->Arg(0).Resolve(), IR::Opcode::BitCastU32F32)};
if (value_2 != value_3) {
return;
if (!value_2.IsImmediate() || !value_3.IsImmediate()) {
return;
}
if (Common::BitCast<u32>(value_2.F32()) != value_3.U32()) {
return;
}
}
const IR::Value index{inst2->Arg(1)};
const IR::Value clamp{inst2->Arg(2)};
@ -648,6 +699,169 @@ void FoldFSwizzleAdd(IR::Block& block, IR::Inst& inst) {
}
}
bool FindGradient3DDerivates(std::array<IR::Value, 3>& results, IR::Value coord) {
if (coord.IsImmediate()) {
return false;
}
const auto check_through_shuffle = [](IR::Value input, IR::Value& result) {
const IR::Value value_1{GetThroughCast(input.Resolve(), IR::Opcode::BitCastF32U32)};
IR::Inst* const inst2{value_1.InstRecursive()};
if (inst2->GetOpcode() != IR::Opcode::ShuffleIndex) {
return false;
}
const IR::Value index{inst2->Arg(1).Resolve()};
const IR::Value clamp{inst2->Arg(2).Resolve()};
const IR::Value segmentation_mask{inst2->Arg(3).Resolve()};
if (!index.IsImmediate() || !clamp.IsImmediate() || !segmentation_mask.IsImmediate()) {
return false;
}
if (index.U32() != 3 && clamp.U32() != 3) {
return false;
}
result = GetThroughCast(inst2->Arg(0).Resolve(), IR::Opcode::BitCastU32F32);
return true;
};
IR::Inst* const inst = coord.InstRecursive();
if (inst->GetOpcode() != IR::Opcode::FSwizzleAdd) {
return false;
}
std::array<IR::Value, 3> temporary_values;
IR::Value value_1 = inst->Arg(0).Resolve();
IR::Value value_2 = inst->Arg(1).Resolve();
IR::Value value_3 = inst->Arg(2).Resolve();
std::array<u32, 4> swizzles_mask_a{};
std::array<u32, 4> swizzles_mask_b{};
const auto resolve_mask = [](std::array<u32, 4>& mask_results, IR::Value mask) {
u32 value = mask.U32();
for (size_t i = 0; i < 4; i++) {
mask_results[i] = (value >> (i * 2)) & 0x3;
}
};
resolve_mask(swizzles_mask_a, value_3);
size_t coordinate_index = 0;
const auto resolve_pending = [&](IR::Value resolve_v) {
IR::Inst* const inst_r = resolve_v.InstRecursive();
if (inst_r->GetOpcode() != IR::Opcode::FSwizzleAdd) {
return false;
}
if (!check_through_shuffle(inst_r->Arg(0).Resolve(), temporary_values[1])) {
return false;
}
if (!check_through_shuffle(inst_r->Arg(1).Resolve(), temporary_values[2])) {
return false;
}
resolve_mask(swizzles_mask_b, inst_r->Arg(2).Resolve());
return true;
};
if (value_1.IsImmediate() || value_2.IsImmediate()) {
return false;
}
bool should_continue = false;
if (resolve_pending(value_1)) {
should_continue = check_through_shuffle(value_2, temporary_values[0]);
coordinate_index = 0;
}
if (resolve_pending(value_2)) {
should_continue = check_through_shuffle(value_1, temporary_values[0]);
coordinate_index = 2;
}
if (!should_continue) {
return false;
}
// figure which is which
size_t zero_mask_a = 0;
size_t zero_mask_b = 0;
for (size_t i = 0; i < 4; i++) {
if (swizzles_mask_a[i] == 2 || swizzles_mask_b[i] == 2) {
// last operand can be inversed, we cannot determine a result.
return false;
}
zero_mask_a |= static_cast<size_t>(swizzles_mask_a[i] == 3 ? 1 : 0) << i;
zero_mask_b |= static_cast<size_t>(swizzles_mask_b[i] == 3 ? 1 : 0) << i;
}
static constexpr size_t ddx_pattern = 0b1010;
static constexpr size_t ddx_pattern_inv = ~ddx_pattern & 0b00001111;
if (std::popcount(zero_mask_a) != 2) {
return false;
}
if (std::popcount(zero_mask_b) != 2) {
return false;
}
if (zero_mask_a == zero_mask_b) {
return false;
}
results[0] = temporary_values[coordinate_index];
if (coordinate_index == 0) {
if (zero_mask_b == ddx_pattern || zero_mask_b == ddx_pattern_inv) {
results[1] = temporary_values[1];
results[2] = temporary_values[2];
return true;
}
results[2] = temporary_values[1];
results[1] = temporary_values[2];
} else {
const auto assign_result = [&results](IR::Value temporary_value, size_t mask) {
if (mask == ddx_pattern || mask == ddx_pattern_inv) {
results[1] = temporary_value;
return;
}
results[2] = temporary_value;
};
assign_result(temporary_values[1], zero_mask_b);
assign_result(temporary_values[0], zero_mask_a);
}
return true;
}
void FoldImageSampleImplicitLod(IR::Block& block, IR::Inst& inst) {
IR::TextureInstInfo info = inst.Flags<IR::TextureInstInfo>();
auto orig_opcode = inst.GetOpcode();
if (info.ndv_is_active == 0) {
return;
}
if (info.type != TextureType::Color3D) {
return;
}
const IR::Value handle{inst.Arg(0)};
const IR::Value coords{inst.Arg(1)};
const IR::Value bias_lc{inst.Arg(2)};
const IR::Value offset{inst.Arg(3)};
if (!offset.IsImmediate()) {
return;
}
IR::Inst* const inst2 = coords.InstRecursive();
std::array<std::array<IR::Value, 3>, 3> results_matrix;
for (size_t i = 0; i < 3; i++) {
if (!FindGradient3DDerivates(results_matrix[i], inst2->Arg(i).Resolve())) {
return;
}
}
IR::F32 lod_clamp{};
if (info.has_lod_clamp != 0) {
if (!bias_lc.IsImmediate()) {
lod_clamp = IR::F32{bias_lc.InstRecursive()->Arg(1).Resolve()};
} else {
lod_clamp = IR::F32{bias_lc};
}
}
IR::IREmitter ir{block, IR::Block::InstructionList::s_iterator_to(inst)};
IR::Value new_coords =
ir.CompositeConstruct(results_matrix[0][0], results_matrix[1][0], results_matrix[2][0]);
IR::Value derivatives_1 = ir.CompositeConstruct(results_matrix[0][1], results_matrix[0][2],
results_matrix[1][1], results_matrix[1][2]);
IR::Value derivatives_2 = ir.CompositeConstruct(results_matrix[2][1], results_matrix[2][2]);
info.num_derivates.Assign(3);
IR::Value new_gradient_instruction =
ir.ImageGradient(handle, new_coords, derivatives_1, derivatives_2, lod_clamp, info);
IR::Inst* const new_inst = new_gradient_instruction.InstRecursive();
if (orig_opcode == IR::Opcode::ImageSampleImplicitLod) {
new_inst->ReplaceOpcode(IR::Opcode::ImageGradient);
}
inst.ReplaceUsesWith(new_gradient_instruction);
}
void FoldConstBuffer(Environment& env, IR::Block& block, IR::Inst& inst) {
const IR::Value bank{inst.Arg(0)};
const IR::Value offset{inst.Arg(1)};
@ -743,6 +957,12 @@ void ConstantPropagation(Environment& env, IR::Block& block, IR::Inst& inst) {
case IR::Opcode::SelectF32:
case IR::Opcode::SelectF64:
return FoldSelect(inst);
case IR::Opcode::FPNeg32:
FoldWhenAllImmediates(inst, [](f32 a) { return -a; });
return;
case IR::Opcode::FPAdd32:
FoldFPAdd32(inst);
return;
case IR::Opcode::FPMul32:
return FoldFPMul32(inst);
case IR::Opcode::LogicalAnd:
@ -858,6 +1078,11 @@ void ConstantPropagation(Environment& env, IR::Block& block, IR::Inst& inst) {
FoldDriverConstBuffer(env, block, inst, 1);
}
break;
case IR::Opcode::BindlessImageSampleImplicitLod:
case IR::Opcode::BoundImageSampleImplicitLod:
case IR::Opcode::ImageSampleImplicitLod:
FoldImageSampleImplicitLod(block, inst);
break;
default:
break;
}