Function vcnt_p8 

pub fn vcnt_p8(a: poly8x8_t) -> poly8x8_t

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

Available on (AArch64 or target_arch=arm64ec) and little-endian and target feature neon and target feature v7 only.

Population count per byte. Arm’s documentation