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

interpreter, and a rewrite of the GPU code.

Ryujinx.Graphics/Gal/Shader/ShaderIrOperPred.cs

@@ -0,0 +1,17 @@
+namespace Ryujinx.Graphics.Gal.Shader
+{
+    class ShaderIrOperPred : ShaderIrNode
+    {
+        public const int UnusedIndex  = 0x7;
+        public const int NeverExecute = 0xf;
+
+        public bool IsConst => Index >= UnusedIndex;
+
+        public int Index { get; set; }
+
+        public ShaderIrOperPred(int Index)
+        {
+            this.Index = Index;
+        }
+    }
+}