Function _mm512_mask_inserti32x8

#[target_feature(enable = "avx512dq")]
pub const fn _mm512_mask_inserti32x8(src: __m512i, k: __mmask16, a: __m512i, b: __m256i, IMM8: i32) -> __m512i

Copy a to tmp, then insert 256 bits (composed of 8 packed 32-bit integers) from b into tmp at the location specified by IMM8, and copy tmp to dst using writemask k (elements are copied from src if the corresponding bit is not set).

Intel's Documentation