round_scramble():
  u64 secretWords[8] = secret[secretLength-64:secretLength];
  for (i = 0; i < 8; i++) {
    acc[i] = acc[i] xor (acc[i] >> 47);
    acc[i] = acc[i] xor secretWords[i];
    acc[i] = acc[i] * PRIME32_1;
  }