Function vext_u64 

pub unsafe fn vext_u64(
    a: uint64x1_t,
    _b: uint64x1_t,
    const N: i32,
) -> uint64x1_t

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

Extract vector from pair of vectors Arm’s documentation

Safety

• Neon intrinsic unsafe