A crate to help you go wide.

Specifically, this has portable "wide" data types that do their best to be SIMD when possible.

On x86, x86_64, wasm32 and aarch64 neon this is done with explicit intrinsic usage (via safe_arch), and on other architectures this is done by carefully writing functions so that LLVM hopefully does the right thing. When Rust stabilizes more explicit intrinsics then they can go into safe_arch and then they can get used here.

• The rust-version entry of the crate's Cargo.toml will be kept accurate to the required Rust compiler version.
• The rust-version entry may increase in any new release (major, minor, or patch).
• If your build uses Resolver 3 (or later) this will be fine. If you're using a Resolver earlier than 3 then you are responsible for pinning a maximum crate version when you're using an old Rust version.