core_detect
This crate provides a no_std version of the std::is_x86_feature_detected! macro.
This is possible because x86 chips can just use the cpuid instruction to detect CPU features, whereas most other architectures require either reading files or querying the OS.
Add core_detect = "0.2" to the [dependencies] section of your Cargo.toml.
rust
if core_detect::is_x86_feature_detected!("ssse3") {
println!("SSSE3 is available");
}
Much of this code is taken from the stdarch repository (for easy upgrading / maximal compatibility), and thus it uses the same copyright as Rust — MIT/Apache-2.0 dual license.