cfg_if::cfg_if! {
if #[cfg(all(target_arch = "x86_64", target_feature = "avx2", target_feature = "sse2"))] {
mod x86_64;
pub use x86_64::*;
} else if #[cfg(all(target_feature="neon", target_arch="aarch64"))] {
mod aarch64;
pub use aarch64::*;
} else {
mod fallback;
pub use fallback::*;
}
}