Function vaddhn_high_s64

pub fn vaddhn_high_s64(r: int32x2_t, a: int64x2_t, b: int64x2_t) -> int32x4_t

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

Available on ARM and target feature neon only.

Add returning High Narrow (high half).