Function div_nx2_normalized 

pub fn div_nx2_normalized(u: &mut [u64], d: u128) -> u128

⚠️ Compute double limb normalized division.

⚠️ This function is not part of the stable API.

Requires `divisor` to be in the range $[2^{127}, 2^{128})$ (i.e. normalized). Same as [`div_nx1`] but using [`div_3x2`] internally.