Function core::arch::aarch64::vrshrn_high_n_s64

pub unsafe fn vrshrn_high_n_s64(
    a: int32x2_t, 
    b: int64x2_t, 
    const N: i32
) -> int32x4_t

This is supported on AArch64 and target feature neon only.

Rounding shift right narrow