Function octic_mul 

pub fn octic_mul<F, R, R2, const D: usize>(
    a: &[R; D],
    b: &[R2; D],
    res: &mut [R; D],
    w: F,
)
where
    F: Field,
    R: Algebra<F> + Algebra<R2>,
    R2: Algebra<F>,

Multiplication in an octic binomial extension field.

Makes use of the in built field dot product code. This is optimized for the case that R is a prime field or its packing.