Function vrev64_p16 

pub fn vrev64_p16(a: poly16x4_t) -> poly16x4_t

Available on (AArch64 or ARM64EC) and (AArch64 or ARM64EC or target feature v7) and (ARM or AArch64 or ARM64EC) and target feature neon only.

Reversing vector elements (swap endianness) Arm’s documentation