3 files changed, 122 insertions, 37 deletions

diff --git a/src/video_core/shader/decode/image.cpp b/src/video_core/shader/decode/image.cpp
index 008109a99..d54fb88c9 100644
--- a/src/video_core/shader/decode/image.cpp
+++ b/src/video_core/shader/decode/image.cpp
@@ -44,7 +44,6 @@ u32 ShaderIR::DecodeImage(NodeBlock& bb, u32 pc) {
     switch (opcode->get().GetId()) {
     case OpCode::Id::SUST: {
         UNIMPLEMENTED_IF(instr.sust.mode != Tegra::Shader::SurfaceDataMode::P);
-        UNIMPLEMENTED_IF(instr.sust.image_type == Tegra::Shader::ImageType::TextureBuffer);
         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
 
@@ -66,8 +65,46 @@ u32 ShaderIR::DecodeImage(NodeBlock& bb, u32 pc) {
         image.MarkWrite();
 
         MetaImage meta{image, values};
-        const Node store{Operation(OperationCode::ImageStore, meta, std::move(coords))};
-        bb.push_back(store);
+        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:
@@ -77,38 +114,51 @@ u32 ShaderIR::DecodeImage(NodeBlock& bb, u32 pc) {
     return pc;
 }
 
-Image& ShaderIR::GetImage(Tegra::Shader::Image image, Tegra::Shader::ImageType type) {
-    const auto offset{static_cast<u64>(image.index.Value())};
-
-    // If this image has already been used, return the existing mapping.
-    const auto it = used_images.find(offset);
-    if (it != used_images.end()) {
-        ASSERT(it->second.GetType() == type);
-        return it->second;
+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;
     }
 
-    // Otherwise create a new mapping for this image.
     const std::size_t next_index{used_images.size()};
-    return used_images.emplace(offset, Image{offset, next_index, type}).first->second;
+    return used_images.emplace(offset, Image{offset, next_index, type, size}).first->second;
 }
 
-Image& ShaderIR::GetBindlessImage(Tegra::Shader::Register reg, Tegra::Shader::ImageType type) {
+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 this image has already been used, return the existing mapping.
-    const auto it = used_images.find(cbuf_key);
-    if (it != used_images.end()) {
-        ASSERT(it->second.GetType() == type);
-        return it->second;
+    if (const auto image = TryUseExistingImage(cbuf_key, type, size)) {
+        return *image;
     }
 
-    // Otherwise create a new mapping for this image.
     const std::size_t next_index{used_images.size()};
-    return used_images.emplace(cbuf_key, Image{cbuf_index, cbuf_offset, next_index, type})
+    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
diff --git a/src/video_core/shader/node.h b/src/video_core/shader/node.h
index b29aedce8..b47b201cf 100644
--- a/src/video_core/shader/node.h
+++ b/src/video_core/shader/node.h
@@ -7,6 +7,7 @@
 #include <array>
 #include <cstddef>
 #include <memory>
+#include <optional>
 #include <string>
 #include <tuple>
 #include <utility>
@@ -148,7 +149,14 @@ enum class OperationCode {
     TextureQueryLod,        /// (MetaTexture, float[N] coords) -> float4
     TexelFetch,             /// (MetaTexture, int[N], int) -> float4
 
-    ImageStore, /// (MetaImage, float[N] coords) -> void
+    ImageStore,          /// (MetaImage, int[N] values) -> void
+    AtomicImageAdd,      /// (MetaImage, int[N] coords) -> void
+    AtomicImageMin,      /// (MetaImage, int[N] coords) -> void
+    AtomicImageMax,      /// (MetaImage, int[N] coords) -> void
+    AtomicImageAnd,      /// (MetaImage, int[N] coords) -> void
+    AtomicImageOr,       /// (MetaImage, int[N] coords) -> void
+    AtomicImageXor,      /// (MetaImage, int[N] coords) -> void
+    AtomicImageExchange, /// (MetaImage, int[N] coords) -> void
 
     Branch,         /// (uint branch_target) -> void
     BranchIndirect, /// (uint branch_target) -> void
@@ -275,25 +283,32 @@ private:
 
 class Image final {
 public:
-    constexpr explicit Image(u64 offset, std::size_t index, Tegra::Shader::ImageType type)
-        : offset{offset}, index{index}, type{type}, is_bindless{false} {}
+    constexpr explicit Image(std::size_t offset, std::size_t index, Tegra::Shader::ImageType type,
+                             std::optional<Tegra::Shader::ImageAtomicSize> size)
+        : offset{offset}, index{index}, type{type}, is_bindless{false}, size{size} {}
 
     constexpr explicit Image(u32 cbuf_index, u32 cbuf_offset, std::size_t index,
-                             Tegra::Shader::ImageType type)
+                             Tegra::Shader::ImageType type,
+                             std::optional<Tegra::Shader::ImageAtomicSize> size)
         : offset{(static_cast<u64>(cbuf_index) << 32) | cbuf_offset}, index{index}, type{type},
-          is_bindless{true} {}
+          is_bindless{true}, size{size} {}
 
     constexpr explicit Image(std::size_t offset, std::size_t index, Tegra::Shader::ImageType type,
-                             bool is_bindless, bool is_written, bool is_read)
+                             bool is_bindless, bool is_written, bool is_read,
+                             std::optional<Tegra::Shader::ImageAtomicSize> size)
         : offset{offset}, index{index}, type{type}, is_bindless{is_bindless},
-          is_written{is_written}, is_read{is_read} {}
+          is_written{is_written}, is_read{is_read}, size{size} {}
+
+    void MarkWrite() {
+        is_written = true;
+    }
 
     void MarkRead() {
         is_read = true;
     }
 
-    void MarkWrite() {
-        is_written = true;
+    void SetSize(Tegra::Shader::ImageAtomicSize size_) {
+        size = size_;
     }
 
     constexpr std::size_t GetOffset() const {
@@ -312,25 +327,39 @@ public:
         return is_bindless;
     }
 
-    constexpr bool IsRead() const {
-        return is_read;
-    }
-
     constexpr bool IsWritten() const {
         return is_written;
     }
 
+    constexpr bool IsRead() const {
+        return is_read;
+    }
+
     constexpr std::pair<u32, u32> GetBindlessCBuf() const {
         return {static_cast<u32>(offset >> 32), static_cast<u32>(offset)};
     }
 
+    constexpr bool IsSizeKnown() const {
+        return size.has_value();
+    }
+
+    constexpr Tegra::Shader::ImageAtomicSize GetSize() const {
+        return size.value();
+    }
+
+    constexpr bool operator<(const Image& rhs) const {
+        return std::tie(offset, index, type, size, is_bindless) <
+               std::tie(rhs.offset, rhs.index, rhs.type, rhs.size, rhs.is_bindless);
+    }
+
 private:
     u64 offset{};
     std::size_t index{};
     Tegra::Shader::ImageType type{};
     bool is_bindless{};
-    bool is_read{};
     bool is_written{};
+    bool is_read{};
+    std::optional<Tegra::Shader::ImageAtomicSize> size{};
 };
 
 struct GlobalMemoryBase {
diff --git a/src/video_core/shader/shader_ir.h b/src/video_core/shader/shader_ir.h
index 0f891eace..62816bd56 100644
--- a/src/video_core/shader/shader_ir.h
+++ b/src/video_core/shader/shader_ir.h
@@ -272,10 +272,16 @@ private:
                                       bool is_shadow);
 
     /// Accesses an image.
-    Image& GetImage(Tegra::Shader::Image image, Tegra::Shader::ImageType type);
+    Image& GetImage(Tegra::Shader::Image image, Tegra::Shader::ImageType type,
+                    std::optional<Tegra::Shader::ImageAtomicSize> size = {});
 
     /// Access a bindless image sampler.
-    Image& GetBindlessImage(Tegra::Shader::Register reg, Tegra::Shader::ImageType type);
+    Image& GetBindlessImage(Tegra::Shader::Register reg, Tegra::Shader::ImageType type,
+                            std::optional<Tegra::Shader::ImageAtomicSize> size = {});
+
+    /// Tries to access an existing image, updating it's state as needed
+    Image* TryUseExistingImage(u64 offset, Tegra::Shader::ImageType type,
+                               std::optional<Tegra::Shader::ImageAtomicSize> size);
 
     /// Extracts a sequence of bits from a node
     Node BitfieldExtract(Node value, u32 offset, u32 bits);