Function simd_cross_8 

pub fn simd_cross_8(
    a_x: [f64; 8],
    a_y: [f64; 8],
    a_z: [f64; 8],
    b_x: [f64; 8],
    b_y: [f64; 8],
    b_z: [f64; 8],
) -> ([f64; 8], [f64; 8], [f64; 8])

Vectorized 3D cross product

Computes cross product for 8 3D vector pairs c = a × b