# Function _mm512_mask_reduce_and_epi64

Source

    pub fn _mm512_mask_reduce_and_epi64(k: __mmask8, a: __m512i) -> i64

🔬This is a nightly-only experimental API. (`stdarch_x86_avx512` #111137)
Available on (x86 or x86-64) and target feature `avx512f` and x86 only.
Expand description

Reduce the packed 64-bit integers in a by addition using mask k. Returns the sum of all active elements in a.

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