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) {
      for (int i = 0; i < iterations; i++) {
        v0 += v1;
        v2 += v3;

      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) {
      for (int i = 0; i < iterations; i++) {
        v0 += v1;
        v2 += v3;