1 files changed, 164 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/image.cpp b/src/video_core/shader/decode/image.cpp
new file mode 100644
index 000000000..d54fb88c9
--- /dev/null
+++ b/src/video_core/shader/decode/image.cpp
@@ -0,0 +1,164 @@
+// Copyright 2019 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <algorithm>
+#include <vector>
+#include <fmt/format.h>
+
+#include "common/assert.h"
+#include "common/bit_field.h"
+#include "common/common_types.h"
+#include "common/logging/log.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/node_helper.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+
+namespace {
+std::size_t GetImageTypeNumCoordinates(Tegra::Shader::ImageType image_type) {
+    switch (image_type) {
+    case Tegra::Shader::ImageType::Texture1D:
+    case Tegra::Shader::ImageType::TextureBuffer:
+        return 1;
+    case Tegra::Shader::ImageType::Texture1DArray:
+    case Tegra::Shader::ImageType::Texture2D:
+        return 2;
+    case Tegra::Shader::ImageType::Texture2DArray:
+    case Tegra::Shader::ImageType::Texture3D:
+        return 3;
+    }
+    UNREACHABLE();
+    return 1;
+}
+} // Anonymous namespace
+
+u32 ShaderIR::DecodeImage(NodeBlock& bb, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    switch (opcode->get().GetId()) {
+    case OpCode::Id::SUST: {
+        UNIMPLEMENTED_IF(instr.sust.mode != Tegra::Shader::SurfaceDataMode::P);
+        UNIMPLEMENTED_IF(instr.sust.out_of_bounds_store != Tegra::Shader::OutOfBoundsStore::Ignore);
+        UNIMPLEMENTED_IF(instr.sust.component_mask_selector != 0xf); // Ensure we have an RGBA store
+
+        std::vector<Node> values;
+        constexpr std::size_t hardcoded_size{4};
+        for (std::size_t i = 0; i < hardcoded_size; ++i) {
+            values.push_back(GetRegister(instr.gpr0.Value() + i));
+        }
+
+        std::vector<Node> coords;
+        const std::size_t num_coords{GetImageTypeNumCoordinates(instr.sust.image_type)};
+        for (std::size_t i = 0; i < num_coords; ++i) {
+            coords.push_back(GetRegister(instr.gpr8.Value() + i));
+        }
+
+        const auto type{instr.sust.image_type};
+        auto& image{instr.sust.is_immediate ? GetImage(instr.image, type)
+                                            : GetBindlessImage(instr.gpr39, type)};
+        image.MarkWrite();
+
+        MetaImage meta{image, values};
+        bb.push_back(Operation(OperationCode::ImageStore, meta, std::move(coords)));
+        break;
+    }
+    case OpCode::Id::SUATOM: {
+        UNIMPLEMENTED_IF(instr.suatom_d.is_ba != 0);
+
+        Node value = GetRegister(instr.gpr0);
+
+        std::vector<Node> coords;
+        const std::size_t num_coords{GetImageTypeNumCoordinates(instr.sust.image_type)};
+        for (std::size_t i = 0; i < num_coords; ++i) {
+            coords.push_back(GetRegister(instr.gpr8.Value() + i));
+        }
+
+        const OperationCode operation_code = [instr] {
+            switch (instr.suatom_d.operation) {
+            case Tegra::Shader::ImageAtomicOperation::Add:
+                return OperationCode::AtomicImageAdd;
+            case Tegra::Shader::ImageAtomicOperation::Min:
+                return OperationCode::AtomicImageMin;
+            case Tegra::Shader::ImageAtomicOperation::Max:
+                return OperationCode::AtomicImageMax;
+            case Tegra::Shader::ImageAtomicOperation::And:
+                return OperationCode::AtomicImageAnd;
+            case Tegra::Shader::ImageAtomicOperation::Or:
+                return OperationCode::AtomicImageOr;
+            case Tegra::Shader::ImageAtomicOperation::Xor:
+                return OperationCode::AtomicImageXor;
+            case Tegra::Shader::ImageAtomicOperation::Exch:
+                return OperationCode::AtomicImageExchange;
+            default:
+                UNIMPLEMENTED_MSG("Unimplemented operation={}",
+                                  static_cast<u32>(instr.suatom_d.operation.Value()));
+                return OperationCode::AtomicImageAdd;
+            }
+        }();
+
+        const auto& image{GetImage(instr.image, instr.suatom_d.image_type, instr.suatom_d.size)};
+        MetaImage meta{image, {std::move(value)}};
+        SetRegister(bb, instr.gpr0, Operation(operation_code, meta, std::move(coords)));
+        break;
+    }
+    default:
+        UNIMPLEMENTED_MSG("Unhandled image instruction: {}", opcode->get().GetName());
+    }
+
+    return pc;
+}
+
+Image& ShaderIR::GetImage(Tegra::Shader::Image image, Tegra::Shader::ImageType type,
+                          std::optional<Tegra::Shader::ImageAtomicSize> size) {
+    const auto offset{static_cast<std::size_t>(image.index.Value())};
+    if (const auto image = TryUseExistingImage(offset, type, size)) {
+        return *image;
+    }
+
+    const std::size_t next_index{used_images.size()};
+    return used_images.emplace(offset, Image{offset, next_index, type, size}).first->second;
+}
+
+Image& ShaderIR::GetBindlessImage(Tegra::Shader::Register reg, Tegra::Shader::ImageType type,
+                                  std::optional<Tegra::Shader::ImageAtomicSize> size) {
+    const Node image_register{GetRegister(reg)};
+    const auto [base_image, cbuf_index, cbuf_offset]{
+        TrackCbuf(image_register, global_code, static_cast<s64>(global_code.size()))};
+    const auto cbuf_key{(static_cast<u64>(cbuf_index) << 32) | static_cast<u64>(cbuf_offset)};
+
+    if (const auto image = TryUseExistingImage(cbuf_key, type, size)) {
+        return *image;
+    }
+
+    const std::size_t next_index{used_images.size()};
+    return used_images.emplace(cbuf_key, Image{cbuf_index, cbuf_offset, next_index, type, size})
+        .first->second;
+}
+
+Image* ShaderIR::TryUseExistingImage(u64 offset, Tegra::Shader::ImageType type,
+                                     std::optional<Tegra::Shader::ImageAtomicSize> size) {
+    auto it = used_images.find(offset);
+    if (it == used_images.end()) {
+        return nullptr;
+    }
+    auto& image = it->second;
+    ASSERT(image.GetType() == type);
+
+    if (size) {
+        // We know the size, if it's known it has to be the same as before, otherwise we can set it.
+        if (image.IsSizeKnown()) {
+            ASSERT(image.GetSize() == size);
+        } else {
+            image.SetSize(*size);
+        }
+    }
+    return &image;
+}
+
+} // namespace VideoCommon::Shader