Initial work

Ryujinx.Graphics.Shader/Decoders/OpCode.cs

@@ -0,0 +1,30 @@
+using Ryujinx.Graphics.Shader.Instructions;
+
+namespace Ryujinx.Graphics.Shader.Decoders
+{
+    class OpCode
+    {
+        public InstEmitter Emitter { get; }
+
+        public ulong Address   { get; }
+        public long  RawOpCode { get; }
+
+        public Register Predicate { get; protected set; }
+
+        public bool InvertPredicate { get; protected set; }
+
+        // When inverted, the always true predicate == always false.
+        public bool NeverExecute => Predicate.Index == RegisterConsts.PredicateTrueIndex && InvertPredicate;
+
+        public OpCode(InstEmitter emitter, ulong address, long opCode)
+        {
+            Emitter   = emitter;
+            Address   = address;
+            RawOpCode = opCode;
+
+            Predicate = new Register(opCode.Extract(16, 3), RegisterType.Predicate);
+
+            InvertPredicate = opCode.Extract(19);
+        }
+    }
+}