pub unsafe fn _mm256_inserti32x4(
    a: __m256i,
    b: __m128i,
    const IMM8: i32
) -> __m256i
🔬This is a nightly-only experimental API. (stdsimd #48556)
Available on (x86 or x86-64) and target feature avx512f,avx512vl and x86-64 only.
Expand description

Copy a to dst, then insert 128 bits (composed of 4 packed 32-bit integers) from b into dst at the location specified by imm8.

Intel’s documentation