Function vpaddl_s8 

pub fn vpaddl_s8(a: int8x8_t) -> int16x4_t

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

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

Signed Add and Accumulate Long Pairwise. Arm’s documentation