Function vqrdmulh_n_s32 

pub fn vqrdmulh_n_s32(a: int32x2_t, b: i32) -> int32x2_t

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

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