1 files changed, 165 insertions, 0 deletions
diff --git a/src/shader_recompiler/frontend/maxwell/translate/impl/texture_load.cpp b/src/shader_recompiler/frontend/maxwell/translate/impl/texture_load.cpp
new file mode 100644
index 000000000..983058303
--- /dev/null
+++ b/src/shader_recompiler/frontend/maxwell/translate/impl/texture_load.cpp
@@ -0,0 +1,165 @@
+// 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