private FstswChainMatcher GetMatcher()
 {
     Program lr = asm.GetImage();
     X86Disassembler dasm = new X86Disassembler(
         lr.Image.CreateLeReader(0),
         PrimitiveType.Word32,
         PrimitiveType.Word32,
         false);
     instrs = new List<IntelInstruction>();
     return new FstswChainMatcher(dasm.ToArray(), orw);
 }