pub fn pcg64(state: &mut u128) -> u64 {
	let mut x = *state;
	pcg64_iterstate(state);
	let count = (x >> (128 - 6)) as u32; // Highest 6 bits
    x ^= x >> 35;
    ((x >> 58) as u64).rotate_right(count)
}

fn pcg64_iterstate(state: &mut u128) {
	const MULTIPLIER: u128 = 0xde92a69f6e2f9f25fd0d90f576075fbd;
	const INCREMENT: u128 = 621;
	*state = state.wrapping_mul(MULTIPLIER).wrapping_add(INCREMENT);
}

pub fn pcg64_seed(state: &mut u128, bytes: &[u8]) {
    for byte in bytes {
        *state = (*state ^ *byte as u128).rotate_right(8);
    }
	pcg64_iterstate(state);
}