Function quaternion_core::scale_add

pub fn scale_add<T>(s: T, a: Quaternion<T>, b: Quaternion<T>) -> Quaternion<T> where
    T: FloatSimd<T>, 

s*a + b

If the fma feature is enabled, the FMA calculation is performed using the mul_add method. If not enabled, it’s computed by unfused multiply-add (s*a + b).