Function div_3x2 

pub fn div_3x2(u21: u128, u0: u64, d: u128, v: u64) -> (u64, u128)

⚠️ Computes the quotient of a 192 bits divided by a normalized u128.

⚠️ This function is not part of the stable API.

Implements [MG10] algorithm 5.