Macro safe_arch::insert_i64_to_m256i

macro_rules! insert_i64_to_m256i {
    ($a:expr, $i:expr, $imm:expr) => { ... };
}

This is supported with target feature avx only.

Inserts an i64 to m256i

let a = m256i::from([0_i64; 4]);
let b: [i64; 4] = insert_i64_to_m256i!(a, 5_i64, 3).into();
let c: [i64; 4] = m256i::from([0, 0, 0, 5_i64]).into();
assert_eq!(b, c);