Function vqrdmulhq_n_s16 

pub fn vqrdmulhq_n_s16(a: int16x8_t, b: i16) -> int16x8_t

Available on target feature neon and (AArch64 or ARM or ARM64EC) and (AArch64 or ARM64EC) and (AArch64 or ARM64EC or target feature v7) only.

Vector saturating rounding doubling multiply high with scalar Arm’s documentation