video_core: Refactor command_processor.

Inline the WriteReg helper as it is called ~20k times per frame.

src/video_core/command_processor.cpp

@@ -28,7 +28,12 @@ enum class BufferMethods {
     CountBufferMethods = 0x40,
 };
 
-void GPU::WriteReg(u32 method, u32 subchannel, u32 value, u32 remaining_params) {
+MICROPROFILE_DEFINE(ProcessCommandLists, "GPU", "Execute command buffer", MP_RGB(128, 128, 192));
+
+void GPU::ProcessCommandLists(const std::vector<CommandListHeader>& commands) {
+    MICROPROFILE_SCOPE(ProcessCommandLists);
+
+    auto WriteReg = [this](u32 method, u32 subchannel, u32 value, u32 remaining_params) {
         LOG_TRACE(HW_GPU,
                   "Processing method {:08X} on subchannel {} value "
                   "{:08X} remaining params {}",
@@ -67,12 +72,8 @@ void GPU::WriteReg(u32 method, u32 subchannel, u32 value, u32 remaining_params)
         default:
             UNIMPLEMENTED_MSG("Unimplemented engine");
         }
-}
-
-MICROPROFILE_DEFINE(ProcessCommandLists, "GPU", "Execute command buffer", MP_RGB(128, 128, 192));
+    };
 
-void GPU::ProcessCommandLists(const std::vector<CommandListHeader>& commands) {
-    MICROPROFILE_SCOPE(ProcessCommandLists);
     for (auto entry : commands) {
         Tegra::GPUVAddr address = entry.Address();
         u32 size = entry.sz;

src/video_core/gpu.h

@@ -132,9 +132,6 @@ public:
     const Tegra::MemoryManager& MemoryManager() const;
 
 private:
-    /// Writes a single register in the engine bound to the specified subchannel
-    void WriteReg(u32 method, u32 subchannel, u32 value, u32 remaining_params);
-
     std::unique_ptr<Tegra::MemoryManager> memory_manager;
 
     /// Mapping of command subchannels to their bound engine ids.