Function vqrdmulh_laneq_s16 

pub fn vqrdmulh_laneq_s16(
    a: int16x4_t,
    b: int16x8_t,
    const LANE: i32,
) -> int16x4_t

🔬This is a nightly-only experimental API. (stdarch_arm_neon_intrinsics #111800)

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

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