[RustCrypto]: CPU Feature Detection

Lightweight and efficient runtime CPU feature detection for aarch64 and x86/x86_64 targets.

Supports no_std as well as mobile targets including iOS and Android, providing an alternative to the std-dependent is_x86_feature_detected! macro.

Documentation

Supported architectures

aarch64: Android, iOS, Linux, and macOS/M4 only

Note: ARM64 does not support OS-independent feature detection, so support must be implemented on an OS-by-OS basis.

Target features:

• aes
• sha2
• sha3

Note: please open a GitHub Issue to request support for additional features.

x86/x86_64: OS independent and no_std-friendly

Target features:

• adx
• aes
• avx
• avx2
• bmi1
• bmi2
• fma
• mmx
• pclmulqdq
• popcnt
• rdrand
• rdseed
• sgx
• sha
• sse
• sse2
• sse3
• sse4.1
• sse4.2
• ssse3

License

Licensed under either of:

• Apache License, Version 2.0
• MIT license

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.