Function vaddhn_s32 

pub fn vaddhn_s32(a: int32x4_t, b: int32x4_t) -> int16x4_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.

Add returning High Narrow. Arm’s documentation