```
pub unsafe fn _mm512_mask_bitshuffle_epi64_mask(
k: u64,
b: __m512i,
c: __m512i
) -> u64
```

🔬This is a nightly-only experimental API. (

`stdsimd`

#48556)Available on

**x86-64**only.## Expand description

Considers the input `b`

as packed 64-bit integers and `c`

as packed 8-bit integers.
Then groups 8 8-bit values from `c`

as indices into the bits of the corresponding 64-bit integer.
It then selects these bits and packs them into the output.

Uses the writemask in k - elements are zeroed in the result if the corresponding mask bit is not set. Otherwise the computation result is written into the result.