3 ms·

It is easy, but I'm not sure the coarse-grained levels accurately capture the craziness of which AVX512 feature bits are supported on which models once you get

• jeffbee 1y ago
  If you want to branch around having or not having something like AVX-VNNI you still need to use IFUNC or just patch your own function pointers (this is the better choice, since IFUNC is both slow and a security risk).