Function vshl_n_u8 

pub fn vshl_n_u8(a: uint8x8_t, const N: i32) -> uint8x8_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.

Shift left Arm’s documentation