Function vqrshrun_n_s64 

pub fn vqrshrun_n_s64(a: int64x2_t, const N: i32) -> uint32x2_t

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

Signed saturating rounded shift right unsigned narrow Arm’s documentation