# Function _mm256_mask_popcnt_epi64

1.89.0 · Source

    pub fn _mm256_mask_popcnt_epi64(
        src: __m256i,
        k: __mmask8,
        a: __m256i,
    ) -> __m256i

Available on (x86 or x86-64) and target feature `avx512vpopcntdq,avx512vl` and x86-64 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 copied from src if the corresponding mask bit is not set. Otherwise the computation result is written into the result.

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