Function vmulq_p8 

pub fn vmulq_p8(a: poly8x16_t, b: poly8x16_t) -> poly8x16_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.

Polynomial multiply Arm’s documentation