Function amcl_wrapper::utils::barrett_reduction

pub fn barrett_reduction(
    x: &DoubleBigNum, 
    modulus: &BigNum, 
    k: usize, 
    u: &BigNum, 
    v: &BigNum
) -> BigNum

Perform Barrett reduction given the params computed from barrett_reduction_params. Algorithm 14.42 from Handbook of Applied Cryptography