From 62b827f474f0aa2152dd339fcc7cf31084e16a0b Mon Sep 17 00:00:00 2001
From: emmauss <emmausssss@gmail.com>
Date: Tue, 20 Feb 2018 22:09:23 +0200
Subject: Split main project into core,graphics and chocolarm4 subproject (#29)

---
 ChocolArm64/Decoder/AOpCodeAluImm.cs | 39 ++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 ChocolArm64/Decoder/AOpCodeAluImm.cs

(limited to 'ChocolArm64/Decoder/AOpCodeAluImm.cs')

diff --git a/ChocolArm64/Decoder/AOpCodeAluImm.cs b/ChocolArm64/Decoder/AOpCodeAluImm.cs
new file mode 100644
index 00000000..e913475a
--- /dev/null
+++ b/ChocolArm64/Decoder/AOpCodeAluImm.cs
@@ -0,0 +1,39 @@
+using ChocolArm64.Instruction;
+using System;
+
+namespace ChocolArm64.Decoder
+{
+    class AOpCodeAluImm : AOpCodeAlu, IAOpCodeAluImm
+    {
+        public long Imm { get; private set; }
+
+        public AOpCodeAluImm(AInst Inst, long Position, int OpCode) : base(Inst, Position, OpCode)
+        {
+            if (DataOp == ADataOp.Arithmetic)
+            {
+                Imm = (OpCode >> 10) & 0xfff;
+
+                int Shift = (OpCode >> 22) & 3;
+
+                Imm <<= Shift * 12;
+            }
+            else if (DataOp == ADataOp.Logical)
+            {
+                var BM = ADecoderHelper.DecodeBitMask(OpCode, true);
+
+                if (BM.IsUndefined)
+                {
+                    Emitter = AInstEmit.Und;
+
+                    return;
+                }
+
+                Imm = BM.WMask;
+            }
+            else
+            {
+                throw new ArgumentException(nameof(OpCode));
+            }
+        }
+    }
+}
\ No newline at end of file
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