### Added
- `hardware_accelerated` function ([#579])

### Changed
- Internal implementation of backends ([#560], [#575])

### Fixed
- Performance regression on x86 targets ([#575])

[#560]: https://github.com/RustCrypto/block-ciphers/pull/560
[#575]: https://github.com/RustCrypto/block-ciphers/pull/575
[#579]: https://github.com/RustCrypto/block-ciphers/pull/579