1 files changed, 95 insertions, 0 deletions
diff --git a/ARMeilleure/Decoders/OpCodeSimdMemSs.cs b/ARMeilleure/Decoders/OpCodeSimdMemSs.cs
new file mode 100644
index 00000000..302decbc
--- /dev/null
+++ b/ARMeilleure/Decoders/OpCodeSimdMemSs.cs
@@ -0,0 +1,95 @@
+namespace ARMeilleure.Decoders
+{
+    class OpCodeSimdMemSs : OpCodeMemReg, IOpCodeSimd
+    {
+        public int  SElems    { get; private set; }
+        public int  Index     { get; private set; }
+        public bool Replicate { get; private set; }
+        public bool WBack     { get; private set; }
+
+        public OpCodeSimdMemSs(InstDescriptor inst, ulong address, int opCode) : base(inst, address, opCode)
+        {
+            int size   = (opCode >> 10) & 3;
+            int s      = (opCode >> 12) & 1;
+            int sElems = (opCode >> 12) & 2;
+            int scale  = (opCode >> 14) & 3;
+            int l      = (opCode >> 22) & 1;
+            int q      = (opCode >> 30) & 1;
+
+            sElems |= (opCode >> 21) & 1;
+
+            sElems++;
+
+            int index = (q << 3) | (s << 2) | size;
+
+            switch (scale)
+            {
+                case 1:
+                {
+                    if ((size & 1) != 0)
+                    {
+                        Instruction = InstDescriptor.Undefined;
+
+                        return;
+                    }
+
+                    index >>= 1;
+
+                    break;
+                }
+
+                case 2:
+                {
+                    if ((size & 2) != 0 ||
+                       ((size & 1) != 0 && s != 0))
+                    {
+                        Instruction = InstDescriptor.Undefined;
+
+                        return;
+                    }
+
+                    if ((size & 1) != 0)
+                    {
+                        index >>= 3;
+
+                        scale = 3;
+                    }
+                    else
+                    {
+                        index >>= 2;
+                    }
+
+                    break;
+                }
+
+                case 3:
+                {
+                    if (l == 0 || s != 0)
+                    {
+                        Instruction = InstDescriptor.Undefined;
+
+                        return;
+                    }
+
+                    scale = size;
+
+                    Replicate = true;
+
+                    break;
+                }
+            }
+
+            Index  = index;
+            SElems = sElems;
+            Size   = scale;
+
+            Extend64 = false;
+
+            WBack = ((opCode >> 23) & 1) != 0;
+
+            RegisterSize = q != 0
+                ? RegisterSize.Simd128
+                : RegisterSize.Simd64;
+        }
+    }
+}
+\ No newline at end of file