// End with a byte encoding the positive integer b mod 256.
      finalM ^= b << 56;
      processM(finalM);

      // Finalization
      v2 ^= 0xFFL;
      sipRound(d);
      return HashCode.fromLong(v0 ^ v1 ^ v2 ^ v3);
    }

    private void processM(long m) {
      v3 ^= m;
      sipRound(c);
      v0 ^= m;
    }

    private void sipRound(int iterations) {

      // End with a byte encoding the positive integer b mod 256.
      finalM ^= b << 56;
      processM(finalM);

      // Finalization
      v2 ^= 0xFFL;
      sipRound(d);
      return HashCode.fromLong(v0 ^ v1 ^ v2 ^ v3);
    }

    private void processM(long m) {
      v3 ^= m;
      sipRound(c);
      v0 ^= m;
    }

    private void sipRound(int iterations) {

   * are interpreted in little endian order.
   *
   * @since 15.0 (since 12.0 in HashCodes)
   */
  public static HashCode fromLong(long hash) {
    return new LongHashCode(hash);
  }

  private static final class LongHashCode extends HashCode implements Serializable {
    final long hash;

    LongHashCode(long hash) {

   * are interpreted in little endian order.
   *
   * @since 15.0 (since 12.0 in HashCodes)
   */
  public static HashCode fromLong(long hash) {
    return new LongHashCode(hash);
  }

  private static final class LongHashCode extends HashCode implements Serializable {
    final long hash;

    LongHashCode(long hash) {