Function _mm_maskz_compress_pd 

pub fn _mm_maskz_compress_pd(k: __mmask8, a: __m128d) -> __m128d

Available on x86-64 and target feature avx512f and target feature avx512vl only.

Contiguously store the active double-precision (64-bit) floating-point elements in a (those with their respective bit set in zeromask k) to dst, and set the remaining elements to zero.

Intel’s documentation