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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 TextureType : u64 {
_1D,
ARRAY_1D,
_2D,
ARRAY_2D,
_3D,
ARRAY_3D,
CUBE,
ARRAY_CUBE,
};
Shader::TextureType GetType(TextureType type) {
switch (type) {
case TextureType::_1D:
return Shader::TextureType::Color1D;
case TextureType::ARRAY_1D:
return Shader::TextureType::ColorArray1D;
case TextureType::_2D:
return Shader::TextureType::Color2D;
case TextureType::ARRAY_2D:
return Shader::TextureType::ColorArray2D;
case TextureType::_3D:
return Shader::TextureType::Color3D;
case TextureType::ARRAY_3D:
throw NotImplementedException("3D array texture type");
case TextureType::CUBE:
return Shader::TextureType::ColorCube;
case TextureType::ARRAY_CUBE:
return Shader::TextureType::ColorArrayCube;
}
throw NotImplementedException("Invalid texture type {}", type);
}
IR::Value MakeCoords(TranslatorVisitor& v, IR::Reg reg, TextureType type) {
const auto read_array{
[&]() -> IR::U32 { return v.ir.BitFieldExtract(v.X(reg), v.ir.Imm32(0), v.ir.Imm32(16)); }};
switch (type) {
case TextureType::_1D:
return v.X(reg);
case TextureType::ARRAY_1D:
return v.ir.CompositeConstruct(v.X(reg + 1), read_array());
case TextureType::_2D:
return v.ir.CompositeConstruct(v.X(reg), v.X(reg + 1));
case TextureType::ARRAY_2D:
return v.ir.CompositeConstruct(v.X(reg + 1), v.X(reg + 2), read_array());
case TextureType::_3D:
return v.ir.CompositeConstruct(v.X(reg), v.X(reg + 1), v.X(reg + 2));
case TextureType::ARRAY_3D:
throw NotImplementedException("3D array texture type");
case TextureType::CUBE:
return v.ir.CompositeConstruct(v.X(reg), v.X(reg + 1), v.X(reg + 2));
case TextureType::ARRAY_CUBE:
return v.ir.CompositeConstruct(v.X(reg + 1), v.X(reg + 2), v.X(reg + 3), read_array());
}
throw NotImplementedException("Invalid texture type {}", type);
}
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), true);
case TextureType::_2D:
case TextureType::ARRAY_2D:
return v.ir.CompositeConstruct(
v.ir.BitFieldExtract(value, v.ir.Imm32(0), v.ir.Imm32(4), true),
v.ir.BitFieldExtract(value, v.ir.Imm32(4), v.ir.Imm32(4), true));
case TextureType::_3D:
case TextureType::ARRAY_3D:
return v.ir.CompositeConstruct(
v.ir.BitFieldExtract(value, v.ir.Imm32(0), v.ir.Imm32(4), true),
v.ir.BitFieldExtract(value, v.ir.Imm32(4), v.ir.Imm32(4), true),
v.ir.BitFieldExtract(value, v.ir.Imm32(8), v.ir.Imm32(4), true));
case TextureType::CUBE:
case TextureType::ARRAY_CUBE:
throw NotImplementedException("Illegal offset on CUBE sample");
}
throw NotImplementedException("Invalid texture type {}", type);
}
void Impl(TranslatorVisitor& v, u64 insn, bool is_bindless) {
union {
u64 raw;
BitField<49, 1, u64> nodep;
BitField<55, 1, u64> lod;
BitField<50, 1, u64> multisample;
BitField<35, 1, u64> aoffi;
BitField<54, 1, u64> clamp;
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;
BitField<36, 13, u64> cbuf_offset;
} const tld{insn};
const IR::Value coords{MakeCoords(v, tld.coord_reg, tld.type)};
IR::Reg meta_reg{tld.meta_reg};
IR::Value handle;
IR::Value offset;
IR::U32 lod;
IR::U32 multisample;
if (is_bindless) {
handle = v.X(meta_reg++);
} else {
handle = v.ir.Imm32(static_cast<u32>(tld.cbuf_offset.Value() * 4));
}
if (tld.lod != 0) {
lod = v.X(meta_reg++);
} else {
lod = v.ir.Imm32(0U);
}
if (tld.aoffi != 0) {
offset = MakeOffset(v, meta_reg, tld.type);
}
if (tld.multisample != 0) {
multisample = v.X(meta_reg++);
}
if (tld.clamp != 0) {
throw NotImplementedException("TLD.CL - CLAMP is not implmented");
}
IR::TextureInstInfo info{};
info.type.Assign(GetType(tld.type));
const IR::Value sample{v.ir.ImageFetch(handle, coords, offset, lod, multisample, info)};
IR::Reg dest_reg{tld.dest_reg};
for (size_t element = 0; element < 4; ++element) {
if (((tld.mask >> element) & 1) == 0) {
continue;
}
v.F(dest_reg, IR::F32{v.ir.CompositeExtract(sample, element)});
++dest_reg;
}
if (tld.sparse_pred != IR::Pred::PT) {
v.ir.SetPred(tld.sparse_pred, v.ir.LogicalNot(v.ir.GetSparseFromOp(sample)));
}
}
} // Anonymous namespace
void TranslatorVisitor::TLD(u64 insn) {
Impl(*this, insn, false);
}
void TranslatorVisitor::TLD_b(u64 insn) {
Impl(*this, insn, true);
}
} // namespace Shader::Maxwell
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