pub unsafe fn _mm512_mask_broadcast_f64x4(
    src: __m512d,
    k: __mmask8,
    a: __m256d
) -> __m512d
🔬 This is a nightly-only experimental API. (stdsimd #48556)
Available on x86 and target feature avx512f only.
Expand description

Broadcast the 4 packed double-precision (64-bit) floating-point elements from a to all elements of dst using writemask k (elements are copied from src when the corresponding mask bit is not set).

Intel’s documentation