Macro safe_arch::extract_i64_from_m256i

macro_rules! extract_i64_from_m256i {
    ($a:expr, $imm:expr) => { ... };
}

This is supported with target feature avx only.

Extracts an i64 lane from m256i

let a = m256i::from([9_i64, 10, 11, 12]);
assert_eq!(extract_i64_from_m256i!(a, 1), 10_i64);