Function vadd_p16 

pub fn vadd_p16(a: poly16x4_t, b: poly16x4_t) -> poly16x4_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.

Bitwise exclusive OR Arm’s documentation