1 files changed, 58 insertions, 0 deletions
diff --git a/Ryujinx.Graphics/Shader/Decoders/DecoderHelper.cs b/Ryujinx.Graphics/Shader/Decoders/DecoderHelper.cs
new file mode 100644
index 00000000..fd0a45e8
--- /dev/null
+++ b/Ryujinx.Graphics/Shader/Decoders/DecoderHelper.cs
@@ -0,0 +1,58 @@
+using System;
+
+namespace Ryujinx.Graphics.Shader.Decoders
+{
+    static class DecoderHelper
+    {
+        public static int DecodeS20Immediate(long opCode)
+        {
+            int imm = opCode.Extract(20, 19);
+
+            bool negate = opCode.Extract(56);
+
+            if (negate)
+            {
+                imm = -imm;
+            }
+
+            return imm;
+        }
+
+        public static int Decode2xF10Immediate(long opCode)
+        {
+            int immH0 = opCode.Extract(20, 9);
+            int immH1 = opCode.Extract(30, 9);
+
+            bool negateH0 = opCode.Extract(29);
+            bool negateH1 = opCode.Extract(56);
+
+            if (negateH0)
+            {
+                immH0 |= 1 << 9;
+            }
+
+            if (negateH1)
+            {
+                immH1 |= 1 << 9;
+            }
+
+            return immH1 << 22 | immH0 << 6;
+        }
+
+        public static float DecodeF20Immediate(long opCode)
+        {
+            int imm = opCode.Extract(20, 19);
+
+            bool negate = opCode.Extract(56);
+
+            imm <<= 12;
+
+            if (negate)
+            {
+                imm |= 1 << 31;
+            }
+
+            return BitConverter.Int32BitsToSingle(imm);
+        }
+    }
+}
+\ No newline at end of file