# Function core::arch::x86::_mm256_cmplt_epi64_mask

source ·

    pub unsafe fn _mm256_cmplt_epi64_mask(a: __m256i, b: __m256i) -> __mmask8

🔬This is a nightly-only experimental API. (`stdsimd` #48556)
Available on (x86 or x86-64) and target feature `avx512f,avx512vl` only.
Expand description

Compare packed signed 64-bit integers in a and b for less-than, and store the results in mask vector k.

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