# Function core::arch::x86_64::_mm256_mask_max_epu64

source ·

    pub unsafe fn _mm256_mask_max_epu64(
        src: __m256i,
        k: __mmask8,
        a: __m256i,
        b: __m256i
    ) -> __m256i

🔬This is a nightly-only experimental API. (`stdarch_x86_avx512` #111137)
Available on (x86 or x86-64) and target feature `avx512f,avx512vl` and x86-64 only.
Expand description

Compare packed unsigned 64-bit integers in a and b, and store packed maximum values in dst using writemask k (elements are copied from src when the corresponding mask bit is not set).

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