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// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <optional>
#include "common/bit_field.h"
#include "common/common_types.h"
#include "shader_recompiler/frontend/ir/modifiers.h"
#include "shader_recompiler/frontend/maxwell/translate/impl/impl.h"
namespace Shader::Maxwell {
namespace {
enum class Blod : u64 {
None,
LZ,
LB,
LL,
INVALIDBLOD4,
INVALIDBLOD5,
LBA,
LLA,
};
enum class TextureType : u64 {
_1D,
ARRAY_1D,
_2D,
ARRAY_2D,
_3D,
ARRAY_3D,
CUBE,
ARRAY_CUBE,
};
Shader::TextureType GetType(TextureType type, bool dc) {
switch (type) {
case TextureType::_1D:
return dc ? Shader::TextureType::Shadow1D : Shader::TextureType::Color1D;
case TextureType::ARRAY_1D:
return dc ? Shader::TextureType::ShadowArray1D : Shader::TextureType::ColorArray1D;
case TextureType::_2D:
return dc ? Shader::TextureType::Shadow2D : Shader::TextureType::Color2D;
case TextureType::ARRAY_2D:
return dc ? Shader::TextureType::ShadowArray2D : Shader::TextureType::ColorArray2D;
case TextureType::_3D:
return dc ? Shader::TextureType::Shadow3D : Shader::TextureType::Color3D;
case TextureType::ARRAY_3D:
throw NotImplementedException("3D array texture type");
case TextureType::CUBE:
return dc ? Shader::TextureType::ShadowCube : Shader::TextureType::ColorCube;
case TextureType::ARRAY_CUBE:
return dc ? Shader::TextureType::ShadowArrayCube : Shader::TextureType::ColorArrayCube;
}
throw NotImplementedException("Invalid texture type {}", type);
}
IR::Value MakeCoords(TranslatorVisitor& v, IR::Reg reg, TextureType type) {
const auto read_array{[&]() -> IR::F32 { return v.ir.ConvertUToF(32, v.X(reg)); }};
switch (type) {
case TextureType::_1D:
return v.F(reg);
case TextureType::ARRAY_1D:
return v.ir.CompositeConstruct(read_array(), v.F(reg + 1));
case TextureType::_2D:
return v.ir.CompositeConstruct(v.F(reg), v.F(reg + 1));
case TextureType::ARRAY_2D:
return v.ir.CompositeConstruct(read_array(), v.F(reg + 1), v.F(reg + 2));
case TextureType::_3D:
return v.ir.CompositeConstruct(v.F(reg), v.F(reg + 1), v.F(reg + 2));
case TextureType::ARRAY_3D:
throw NotImplementedException("3D array texture type");
case TextureType::CUBE:
return v.ir.CompositeConstruct(v.F(reg), v.F(reg + 1), v.F(reg + 2));
case TextureType::ARRAY_CUBE:
return v.ir.CompositeConstruct(read_array(), v.F(reg + 1), v.F(reg + 2), v.F(reg + 3));
}
throw NotImplementedException("Invalid texture type {}", type);
}
IR::F32 MakeLod(TranslatorVisitor& v, IR::Reg& reg, Blod blod) {
switch (blod) {
case Blod::None:
return v.ir.Imm32(0.0f);
case Blod::LZ:
return v.ir.Imm32(0.0f);
case Blod::LB:
case Blod::LL:
case Blod::LBA:
case Blod::LLA:
return v.F(reg++);
case Blod::INVALIDBLOD4:
case Blod::INVALIDBLOD5:
break;
}
throw NotImplementedException("Invalid blod {}", blod);
}
IR::Value MakeOffset(TranslatorVisitor& v, IR::Reg& reg, TextureType type) {
const IR::U32 value{v.X(reg++)};
switch (type) {
case TextureType::_1D:
case TextureType::ARRAY_1D:
return v.ir.BitFieldExtract(value, v.ir.Imm32(0), v.ir.Imm32(4));
case TextureType::_2D:
case TextureType::ARRAY_2D:
return v.ir.CompositeConstruct(v.ir.BitFieldExtract(value, v.ir.Imm32(0), v.ir.Imm32(4)),
v.ir.BitFieldExtract(value, v.ir.Imm32(4), v.ir.Imm32(4)));
case TextureType::_3D:
case TextureType::ARRAY_3D:
return v.ir.CompositeConstruct(v.ir.BitFieldExtract(value, v.ir.Imm32(0), v.ir.Imm32(4)),
v.ir.BitFieldExtract(value, v.ir.Imm32(4), v.ir.Imm32(4)),
v.ir.BitFieldExtract(value, v.ir.Imm32(8), v.ir.Imm32(4)));
case TextureType::CUBE:
case TextureType::ARRAY_CUBE:
throw NotImplementedException("Illegal offset on CUBE sample");
}
throw NotImplementedException("Invalid texture type {}", type);
}
bool HasExplicitLod(Blod blod) {
switch (blod) {
case Blod::LL:
case Blod::LLA:
case Blod::LZ:
return true;
default:
return false;
}
}
void Impl(TranslatorVisitor& v, u64 insn, bool aoffi, Blod blod, bool lc,
std::optional<u32> cbuf_offset) {
union {
u64 raw;
BitField<35, 1, u64> ndv;
BitField<49, 1, u64> nodep;
BitField<50, 1, u64> dc;
BitField<51, 3, IR::Pred> sparse_pred;
BitField<0, 8, IR::Reg> dest_reg;
BitField<8, 8, IR::Reg> coord_reg;
BitField<20, 8, IR::Reg> meta_reg;
BitField<28, 3, TextureType> type;
BitField<31, 4, u64> mask;
} const tex{insn};
if (lc) {
throw NotImplementedException("LC");
}
const IR::Value coords{MakeCoords(v, tex.coord_reg, tex.type)};
IR::Reg meta_reg{tex.meta_reg};
IR::Value handle;
IR::Value offset;
IR::F32 dref;
IR::F32 lod_clamp;
if (cbuf_offset) {
handle = v.ir.Imm32(*cbuf_offset);
} else {
handle = v.X(meta_reg++);
}
const IR::F32 lod{MakeLod(v, meta_reg, blod)};
if (aoffi) {
offset = MakeOffset(v, meta_reg, tex.type);
}
if (tex.dc != 0) {
dref = v.F(meta_reg++);
}
IR::TextureInstInfo info{};
info.type.Assign(GetType(tex.type, tex.dc != 0));
info.has_bias.Assign(blod == Blod::LB || blod == Blod::LBA ? 1 : 0);
info.has_lod_clamp.Assign(lc ? 1 : 0);
const IR::Value sample{[&]() -> IR::Value {
if (tex.dc == 0) {
if (HasExplicitLod(blod)) {
return v.ir.ImageSampleExplicitLod(handle, coords, lod, offset, lod_clamp, info);
} else {
return v.ir.ImageSampleImplicitLod(handle, coords, lod, offset, lod_clamp, info);
}
}
if (HasExplicitLod(blod)) {
return v.ir.ImageSampleDrefExplicitLod(handle, coords, dref, lod, offset, lod_clamp,
info);
} else {
return v.ir.ImageSampleDrefImplicitLod(handle, coords, dref, lod, offset, lod_clamp,
info);
}
}()};
for (int element = 0; element < 4; ++element) {
if (((tex.mask >> element) & 1) == 0) {
continue;
}
IR::F32 value;
if (tex.dc != 0) {
value = element < 3 ? IR::F32{sample} : v.ir.Imm32(1.0f);
} else {
value = IR::F32{v.ir.CompositeExtract(sample, element)};
}
v.F(tex.dest_reg + element, value);
}
if (tex.sparse_pred != IR::Pred::PT) {
v.ir.SetPred(tex.sparse_pred, v.ir.LogicalNot(v.ir.GetSparseFromOp(sample)));
}
}
} // Anonymous namespace
void TranslatorVisitor::TEX(u64 insn) {
union {
u64 raw;
BitField<54, 1, u64> aoffi;
BitField<55, 3, Blod> blod;
BitField<58, 1, u64> lc;
BitField<36, 13, u64> cbuf_offset;
} const tex{insn};
Impl(*this, insn, tex.aoffi != 0, tex.blod, tex.lc != 0, static_cast<u32>(tex.cbuf_offset * 4));
}
void TranslatorVisitor::TEX_b(u64 insn) {
union {
u64 raw;
BitField<36, 1, u64> aoffi;
BitField<37, 3, Blod> blod;
BitField<40, 1, u64> lc;
} const tex{insn};
Impl(*this, insn, tex.aoffi != 0, tex.blod, tex.lc != 0, std::nullopt);
}
} // namespace Shader::Maxwell
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