Org.BouncyCastle.Crypto.Engines.RC564Engine.RotateLeft C# (CSharp) Method

        private long RotateLeft(long x, long y) {
            return ((long) (    (ulong) (x << (int) (y & (wordSize-1))) |
                                ((ulong) x >> (int) (wordSize - (y & (wordSize-1)))))
                   );
        }