Function vrhaddq_s32 

pub fn vrhaddq_s32(a: int32x4_t, b: int32x4_t) -> int32x4_t

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

Rounding halving add Arm’s documentation