# Function _mm256_maskz_popcnt_epi64

Source

    pub fn _mm256_maskz_popcnt_epi64(k: __mmask8, a: __m256i) -> __m256i

🔬This is a nightly-only experimental API. (`stdarch_x86_avx512` #111137)
Available on (x86 or x86-64) and target feature `avx512vpopcntdq,avx512vl` and x86 only.
Expand description

For each packed 64-bit integer maps the value to the number of logical 1 bits.

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.

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