Function vqdmull_high_laneq_s16 

pub fn vqdmull_high_laneq_s16(
    a: int16x8_t,
    b: int16x8_t,
    const N: i32,
) -> int32x4_t

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

Signed saturating doubling multiply long Arm’s documentation