1 files changed, 49 insertions, 0 deletions
diff --git a/src/video_core/macro/macro_hle.cpp b/src/video_core/macro/macro_hle.cpp
index 6272a4652..046c8085e 100644
--- a/src/video_core/macro/macro_hle.cpp
+++ b/src/video_core/macro/macro_hle.cpp
@@ -67,6 +67,7 @@ public:
         }
 
         auto& params = maxwell3d.draw_manager->GetIndirectParams();
+        params.is_byte_count = false;
         params.is_indexed = false;
         params.include_count = false;
         params.count_start_address = 0;
@@ -161,6 +162,7 @@ public:
                 0, 0x644, Maxwell3D::HLEReplacementAttributeType::BaseInstance);
         }
         auto& params = maxwell3d.draw_manager->GetIndirectParams();
+        params.is_byte_count = false;
         params.is_indexed = true;
         params.include_count = false;
         params.count_start_address = 0;
@@ -256,6 +258,7 @@ public:
         const u32 estimate = static_cast<u32>(maxwell3d.EstimateIndexBufferSize());
         maxwell3d.dirty.flags[VideoCommon::Dirty::IndexBuffer] = true;
         auto& params = maxwell3d.draw_manager->GetIndirectParams();
+        params.is_byte_count = false;
         params.is_indexed = true;
         params.include_count = true;
         params.count_start_address = maxwell3d.GetMacroAddress(4);
@@ -319,6 +322,47 @@ private:
     }
 };
 
+class HLE_DrawIndirectByteCount final : public HLEMacroImpl {
+public:
+    explicit HLE_DrawIndirectByteCount(Maxwell3D& maxwell3d_) : HLEMacroImpl(maxwell3d_) {}
+
+    void Execute(const std::vector<u32>& parameters, [[maybe_unused]] u32 method) override {
+        auto topology = static_cast<Maxwell3D::Regs::PrimitiveTopology>(parameters[0] & 0xFFFFU);
+        if (!maxwell3d.AnyParametersDirty() || !IsTopologySafe(topology)) {
+            Fallback(parameters);
+            return;
+        }
+
+        auto& params = maxwell3d.draw_manager->GetIndirectParams();
+        params.is_byte_count = true;
+        params.is_indexed = false;
+        params.include_count = false;
+        params.count_start_address = 0;
+        params.indirect_start_address = maxwell3d.GetMacroAddress(2);
+        params.buffer_size = 4;
+        params.max_draw_counts = 1;
+        params.stride = parameters[1];
+        maxwell3d.regs.draw.begin = parameters[0];
+        maxwell3d.regs.draw_auto_stride = parameters[1];
+        maxwell3d.regs.draw_auto_byte_count = parameters[2];
+
+        maxwell3d.draw_manager->DrawArrayIndirect(topology);
+    }
+
+private:
+    void Fallback(const std::vector<u32>& parameters) {
+        maxwell3d.RefreshParameters();
+
+        maxwell3d.regs.draw.begin = parameters[0];
+        maxwell3d.regs.draw_auto_stride = parameters[1];
+        maxwell3d.regs.draw_auto_byte_count = parameters[2];
+
+        maxwell3d.draw_manager->DrawArray(
+            maxwell3d.regs.draw.topology, 0,
+            maxwell3d.regs.draw_auto_byte_count / maxwell3d.regs.draw_auto_stride, 0, 1);
+    }
+};
+
 class HLE_C713C83D8F63CCF3 final : public HLEMacroImpl {
 public:
     explicit HLE_C713C83D8F63CCF3(Maxwell3D& maxwell3d_) : HLEMacroImpl(maxwell3d_) {}
@@ -536,6 +580,11 @@ HLEMacro::HLEMacro(Maxwell3D& maxwell3d_) : maxwell3d{maxwell3d_} {
                          [](Maxwell3D& maxwell3d__) -> std::unique_ptr<CachedMacro> {
                              return std::make_unique<HLE_TransformFeedbackSetup>(maxwell3d__);
                          }));
+    builders.emplace(0xB5F74EDB717278ECULL,
+                     std::function<std::unique_ptr<CachedMacro>(Maxwell3D&)>(
+                         [](Maxwell3D& maxwell3d__) -> std::unique_ptr<CachedMacro> {
+                             return std::make_unique<HLE_DrawIndirectByteCount>(maxwell3d__);
+                         }));
 }
 
 HLEMacro::~HLEMacro() = default;