Initial work

1 files changed, 62 insertions, 0 deletions

diff --git a/Ryujinx.Graphics.Shader/Decoders/OpCodeTextureScalar.cs b/Ryujinx.Graphics.Shader/Decoders/OpCodeTextureScalar.cs
new file mode 100644
index 00000000..1c175e30
--- /dev/null
+++ b/Ryujinx.Graphics.Shader/Decoders/OpCodeTextureScalar.cs
@@ -0,0 +1,62 @@
+// ReSharper disable InconsistentNaming
+using Ryujinx.Graphics.Shader.Instructions;
+
+namespace Ryujinx.Graphics.Shader.Decoders
+{
+    class OpCodeTextureScalar : OpCode
+    {
+#region "Component mask LUT"
+        private const int ____ = 0x0;
+        private const int R___ = 0x1;
+        private const int _G__ = 0x2;
+        private const int RG__ = 0x3;
+        private const int __B_ = 0x4;
+        private const int RGB_ = 0x7;
+        private const int ___A = 0x8;
+        private const int R__A = 0x9;
+        private const int _G_A = 0xa;
+        private const int RG_A = 0xb;
+        private const int __BA = 0xc;
+        private const int R_BA = 0xd;
+        private const int _GBA = 0xe;
+        private const int RGBA = 0xf;
+
+        private static int[,] _maskLut = new int[,]
+        {
+            { R___, _G__, __B_, ___A, RG__, R__A, _G_A, __BA },
+            { RGB_, RG_A, R_BA, _GBA, RGBA, ____, ____, ____ }
+        };
+#endregion
+
+        public Register Rd0 { get; }
+        public Register Ra  { get; }
+        public Register Rb  { get; }
+        public Register Rd1 { get; }
+
+        public int Immediate { get; }
+
+        public int ComponentMask { get; protected set; }
+
+        protected int RawType;
+
+        public bool IsFp16 { get; }
+
+        public OpCodeTextureScalar(InstEmitter emitter, ulong address, long opCode) : base(emitter, address, opCode)
+        {
+            Rd0 = new Register(opCode.Extract(0,  8), RegisterType.Gpr);
+            Ra  = new Register(opCode.Extract(8,  8), RegisterType.Gpr);
+            Rb  = new Register(opCode.Extract(20, 8), RegisterType.Gpr);
+            Rd1 = new Register(opCode.Extract(28, 8), RegisterType.Gpr);
+
+            Immediate = opCode.Extract(36, 13);
+
+            int compSel = opCode.Extract(50, 3);
+
+            RawType = opCode.Extract(53, 4);
+
+            IsFp16 = !opCode.Extract(59);
+
+            ComponentMask = _maskLut[Rd1.IsRZ ? 0 : 1, compSel];
+        }
+    }
+}
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