Function vmax_s8 

pub fn vmax_s8(a: int8x8_t, b: int8x8_t) -> int8x8_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.

Maximum (vector) Arm’s documentation