Merge shader branch, adding support for GLSL decompilation, a macro

interpreter, and a rewrite of the GPU code.

Ryujinx.Graphics/Gal/Shader/ShaderIrOperGpr.cs

@@ -0,0 +1,16 @@
+namespace Ryujinx.Graphics.Gal.Shader
+{
+    class ShaderIrOperGpr : ShaderIrNode
+    {
+        public const int ZRIndex = 0xff;
+
+        public bool IsConst => Index == ZRIndex;
+
+        public int Index { get; set; }
+
+        public ShaderIrOperGpr(int Index)
+        {
+            this.Index = Index;
+        }
+    }
+}