# Function core::arch::x86::_mm512_mask_reduce_max_epi64

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    pub unsafe fn _mm512_mask_reduce_max_epi64(k: __mmask8, a: __m512i) -> i64

🔬This is a nightly-only experimental API. (`stdsimd` #48556)
Available on (x86 or x86-64) and target feature `avx512f` only.
Expand description

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

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