cpu_features
A cross-platform C99 library to detect CPU features and microarchitecture at runtime.
What is cpu_features?
cpu_features is a cross-platform C library that allows software to query CPU capabilities—like supported instruction sets (e.g., AVX, AES, NEON)—at runtime. It solves the problem of writing portable, optimized code by enabling dynamic feature detection, so applications can adapt to the underlying hardware without relying solely on compile-time flags.
System programmers, compiler engineers, and developers of performance-critical applications (e.g., cryptography libraries, game engines, scientific computing) who need to write hardware-aware, portable C/C++ code.
Developers choose cpu_features for its reliability, sandbox compatibility, and zero-overhead design. It provides a simple, thread-safe API with microarchitecture detection, making it a trusted solution for both Google projects and the wider open-source community.
Overview
A cross platform C99 library to get cpu features at runtime.
Use Cases
Best For
- Dynamically enabling SIMD optimizations (e.g., AVX, NEON) in performance-sensitive libraries
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