# ruapu Detect cpu ISA features with single-file
CPU✅ x86, x86-64
✅ arm, aarch64		 ```c #define RUAPU_IMPLEMENTATION #include "ruapu.h" int main() { // initialize ruapu once ruapu_init(); // now, tell me if this cpu has avx2 int has_avx2 = ruapu_supports("avx2"); return 0; } ```
OS✅ Windows
✅ Linux
✅ macOS
✅ Android
✅ iOS
Compiler✅ GCC
✅ Clang
✅ MSVC
✅ MinGW
## Let's ruapu
Compile ruapu test program ```shell # GCC / MinGW gcc main.c -o ruapu ``` ```shell # Clang clang main.c -o ruapu ``` ```shell # MSVC cl.exe /Fe: ruapu.exe main.c ``` Run ruapu in command line ```shell ./ruapu mmx = 1 sse = 1 sse2 = 1 sse3 = 1 ssse3 = 1 sse41 = 1 sse42 = 1 sse4a = 1 xop = 0 ... more lines omitted ... ```
## Features * Detect **CPU ISA with single-file**    _x86-sse, x86-avx, x86-avx512f, x86-avxvnni, arm-neon, etc._ * Detect **vendor extended ISA**     _apple `amx`, risc-v vendor ISA, etc._ * Detect **richer ISA on Windows ARM**   _`IsProcessorFeaturePresent()` returns little ISA information_ * Detect **`x86-avx512` on macOS correctly**  _macOS hides it in `cpuid`_ * Detect **new CPU's ISA on old systems**  _they are usually not exposed in `auxv` or `MISA`_ * Detect **CPU hidden ISA**        _`x86-fma4` on zen1, ISA in hypervisor, etc._ ## Techniques inside ruapu ruapu is implemented in C language to ensure the widest possible portability. ruapu determines whether the CPU supports certain instruction sets by trying to execute instructions and detecting whether an `Illegal Instruction` exception occurs. ruapu does not rely on the cpuid instructions and registers related to the CPU architecture, nor does it rely on the `MISA` information and system calls of the operating system. This can help us get more detailed CPU ISA information.