Function vec_promote 

pub unsafe fn vec_promote<T: VectorPromote>(
    a: T::ElementType,
    b: i32,
) -> MaybeUninit<T>

🔬This is a nightly-only experimental API. (stdarch_s390x #135681)

Available on s390x and non-target_abi=softfloat and target feature vector only.

Vector Promote