ilog2 0.2.2

Integer logarithm library including some bit operations.
Documentation 
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use bitops::*;

pub fn fls<T: Bitops>(x: T) -> u8 {
    (msb(x) + 1) as u8
}

pub fn msb<T: Bitops>(x: T) -> i8 {
    let bits = bit_length::<T>() as i8;
    if x != T::zero() {
        (bits -1i8 - (x.leading_zeros() as i8))
    } else {
        -1i8
    }
}