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

interpreter, and a rewrite of the GPU code.

Ryujinx.Graphics/Gal/Shader/ShaderDecoder.cs

@@ -0,0 +1,41 @@
+namespace Ryujinx.Graphics.Gal.Shader
+{
+    static class ShaderDecoder
+    {
+        public static ShaderIrBlock DecodeBasicBlock(int[] Code, int Offset, GalShaderType ShaderType)
+        {
+            ShaderIrBlock Block = new ShaderIrBlock();
+
+            while (Offset + 2 <= Code.Length)
+            {
+                uint Word0 = (uint)Code[Offset++];
+                uint Word1 = (uint)Code[Offset++];
+
+                long OpCode = Word0 | (long)Word1 << 32;
+
+                ShaderDecodeFunc Decode = ShaderOpCodeTable.GetDecoder(OpCode);
+
+                if (Decode == null)
+                {
+                    continue;
+                }
+
+                Decode(Block, OpCode);
+
+                if (Block.GetLastNode() is ShaderIrOp Op && IsFlowChange(Op.Inst))
+                {
+                    break;
+                }
+            }
+
+            Block.RunOptimizationPasses(ShaderType);
+
+            return Block;
+        }
+
+        private static bool IsFlowChange(ShaderIrInst Inst)
+        {
+            return Inst == ShaderIrInst.Exit;
+        }
+    }
+}