Function vsubq_u8 

pub fn vsubq_u8(a: uint8x16_t, b: uint8x16_t) -> uint8x16_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.

Subtract Arm’s documentation