Function `_mm256_maskz_add_pd`

#[target_feature(enable = "avx512f", enable = "avx512vl")]
pub const fn _mm256_maskz_add_pd(k: __mmask8, a: __m256d, b: __m256d) -> __m256d

Add packed double-precision (64-bit) floating-point elements in a and b, and store the results in dst using zeromask k (elements are zeroed out when the corresponding mask bit is not set).

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