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README.md

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:

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.