public static class OpCodeUtility
    {
        // Values in sync with 4.1.0.13850.

        public const int MaxOpCode = ushort.MaxValue;

        public static int? GetJamOpcode(int fullOpCode)
        {
            if (IsJamOpCode(fullOpCode))
                return ((fullOpCode & 0x8000) >> 8) | fullOpCode & 3 | ((fullOpCode & 0x3800) >> 7) | ((fullOpCode & 0x180) >> 5);

            return null;
        }

        public static int? CompressOpcode(int opCode)
        {
            if ((opCode & 0x4C9) == 0x440)
                return (((opCode & 0xF800) >> 5) | ((opCode & 0x300) >> 4) | ((opCode & 0x6) >> 1) | ((opCode & 0x30) >> 2));

            return null;
        }

        public static bool IsJamOpCode(int fullOpCode)
        {
            return (fullOpCode & 0x467C) == 0x608;
        }

        public static IEnumerable<int> GetCondensedOpCodes(int opCode)
        {
            for (var i = 1; i < MaxOpCode; i++)
                if (CompressOpcode(i) == opCode)
                    yield return i;
        }
    }