From 2055622c844784ceba21678fe8baccba8f882b9e Mon Sep 17 00:00:00 2001
From: merry <git@mary.rs>
Date: Fri, 11 Feb 2022 12:07:52 +0000
Subject: [PATCH] T16: Implement SXTH, SXTB, UXTH, UTXB

---
 ARMeilleure/Decoders/OpCodeT16AluUx.cs | 22 ++++++++++++++++++++++
 ARMeilleure/Decoders/OpCodeTable.cs    |  4 ++++
 2 files changed, 26 insertions(+)
 create mode 100644 ARMeilleure/Decoders/OpCodeT16AluUx.cs

diff --git a/ARMeilleure/Decoders/OpCodeT16AluUx.cs b/ARMeilleure/Decoders/OpCodeT16AluUx.cs
new file mode 100644
index 000000000..3debb761e
--- /dev/null
+++ b/ARMeilleure/Decoders/OpCodeT16AluUx.cs
@@ -0,0 +1,22 @@
+namespace ARMeilleure.Decoders
+{
+    class OpCodeT16AluUx : OpCodeT16, IOpCode32AluUx
+    {
+        public int Rm { get; }
+        public int Rd { get; }
+        public int Rn { get; }
+
+        public bool SetFlags => false;
+
+        public int RotateBits => 0;
+        public bool Add => false;
+
+        public static new OpCode Create(InstDescriptor inst, ulong address, int opCode, bool inITBlock) => new OpCodeT16AluUx(inst, address, opCode, inITBlock);
+
+        public OpCodeT16AluUx(InstDescriptor inst, ulong address, int opCode, bool inITBlock) : base(inst, address, opCode, inITBlock)
+        {
+            Rd = (opCode >> 0) & 0x7;
+            Rm = (opCode >> 3) & 0x7;
+        }
+    }
+}
\ No newline at end of file
diff --git a/ARMeilleure/Decoders/OpCodeTable.cs b/ARMeilleure/Decoders/OpCodeTable.cs
index 2553eec3c..a9fd433f3 100644
--- a/ARMeilleure/Decoders/OpCodeTable.cs
+++ b/ARMeilleure/Decoders/OpCodeTable.cs
@@ -1025,6 +1025,10 @@ namespace ARMeilleure.Decoders
             SetT16("10101xxxxxxxxxxx", InstName.Add,    InstEmit32.Add,     OpCodeT16SpRel.Create);
             SetT16("101100000xxxxxxx", InstName.Add,    InstEmit32.Add,     OpCodeT16AddSubSp.Create);
             SetT16("101100001xxxxxxx", InstName.Sub,    InstEmit32.Sub,     OpCodeT16AddSubSp.Create);
+            SetT16("1011001000xxxxxx", InstName.Sxth,   InstEmit32.Sxth,    OpCodeT16AluUx.Create);
+            SetT16("1011001001xxxxxx", InstName.Sxtb,   InstEmit32.Sxtb,    OpCodeT16AluUx.Create);
+            SetT16("1011001010xxxxxx", InstName.Uxth,   InstEmit32.Uxth,    OpCodeT16AluUx.Create);
+            SetT16("1011001011xxxxxx", InstName.Uxtb,   InstEmit32.Uxtb,    OpCodeT16AluUx.Create);
 #endregion
 
             FillFastLookupTable(InstA32FastLookup, AllInstA32, ToFastLookupIndexA);