Function _mm256_insert_epi32

pub unsafe fn _mm256_insert_epi32(
    a: __m256i,
    i: i32,
    const INDEX: i32,
) -> __m256i

Available on (x86 or x86-64) and target feature avx and x86 only.

Copies a to result, and inserts the 32-bit integer i into result at the location specified by index.

Intel’s documentation