In C#, how to check if current CPU and OS support AVX instruction set ?
I need to choose which native DLL to load, SSE2 or AVX.
Best way is to pinvoke GetEnabledXStateFeatures() , it ensures that both the processor and the OS support AVX:
public static bool HasAvxSupport() {
try {
return (GetEnabledXStateFeatures() & 4) != 0;
}
catch {
return false;
}
}
[System.Runtime.InteropServices.DllImport("kernel32.dll")]
private static extern long GetEnabledXStateFeatures();
No decent way to distinguish between AVX and AVX2 btw, luckily you didn't ask for that.
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