1 files changed, 25 insertions, 0 deletions
diff --git a/src/ARMeilleure/Decoders/OpCode32SimdReg.cs b/src/ARMeilleure/Decoders/OpCode32SimdReg.cs
new file mode 100644
index 00000000..1c46b0e0
--- /dev/null
+++ b/src/ARMeilleure/Decoders/OpCode32SimdReg.cs
@@ -0,0 +1,25 @@
+namespace ARMeilleure.Decoders
+{
+    class OpCode32SimdReg : OpCode32Simd
+    {
+        public int Vn { get; }
+
+        public int Qn => GetQuadwordIndex(Vn);
+        public int In => GetQuadwordSubindex(Vn) << (3 - Size);
+        public int Fn => GetQuadwordSubindex(Vn) << (1 - (Size & 1));
+
+        public new static OpCode Create(InstDescriptor inst, ulong address, int opCode) => new OpCode32SimdReg(inst, address, opCode, false);
+        public new static OpCode CreateT32(InstDescriptor inst, ulong address, int opCode) => new OpCode32SimdReg(inst, address, opCode, true);
+
+        public OpCode32SimdReg(InstDescriptor inst, ulong address, int opCode, bool isThumb) : base(inst, address, opCode, isThumb)
+        {
+            Vn = ((opCode >> 3) & 0x10) | ((opCode >> 16) & 0xf);
+
+            // Subclasses have their own handling of Vx to account for before checking.
+            if (GetType() == typeof(OpCode32SimdReg) && DecoderHelper.VectorArgumentsInvalid(Q, Vd, Vm, Vn))
+            {
+                Instruction = InstDescriptor.Undefined;
+            }
+        }
+    }
+}