Function vshrq_n_u64 

pub fn vshrq_n_u64(a: uint64x2_t, const N: i32) -> uint64x2_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 right Arm’s documentation