Implement FIFO semaphore (#1286)

* Implement FIFO semaphore

* New enum for FIFO semaphore operation

Ryujinx.Graphics.Gpu/State/FifoSemaphoreOperation.cs

@@ -0,0 +1,9 @@
+namespace Ryujinx.Graphics.Gpu.State
+{
+    enum FifoSemaphoreOperation
+    {
+        Counter = 0,
+        Acquire = 1,
+        Release = 2
+    }
+}

Ryujinx.Graphics.Gpu/State/MethodOffset.cs

@@ -8,7 +8,8 @@ namespace Ryujinx.Graphics.Gpu.State
     /// </remarks>
     enum MethodOffset
     {
-        BindChannel                     = 0x00,
+        BindChannel                     = 0x0,
+        Semaphore                       = 0x4,
         FenceValue                      = 0x1c,
         FenceAction                     = 0x1d,
         WaitForIdle                     = 0x44,

Ryujinx.Graphics.Gpu/State/SemaphoreOperation.cs

@@ -1,9 +1,9 @@
 namespace Ryujinx.Graphics.Gpu.State
 {
     /// <summary>
-    /// GPU counter report mode.
+    /// GPU semaphore operation.
     /// </summary>
-    enum ReportMode
+    enum SemaphoreOperation
     {
         Release = 0,
         Acquire = 1,

Ryujinx.Graphics.Gpu/State/SemaphoreState.cs

@@ -1,9 +1,9 @@
 namespace Ryujinx.Graphics.Gpu.State
 {
     /// <summary>
-    /// GPU counter report state.
+    /// GPU semaphore state.
     /// </summary>
-    struct ReportState
+    struct SemaphoreState
     {
 #pragma warning disable CS0649
         public GpuVa Address;