You would only need to do that scanning if the program had hard requirements like it was compiled to assume AVX512 support was present. Which is going to be ext

You would only need to do that scanning if the program had hard requirements like it was compiled to assume AVX512 support was present. Which is going to be extremely rare, since that would already mean an x86 program that's highly non-portable. Runtime detection would be the only actual concern here, but you can easily just advertise the common baseline. As in, just pretend the sunny cove core doesn't support AVX512. The only problem then becomes the big core is potentially slower than it could be, but given how rare things like AVX512 is in typical desktop applications will anyone actually care? EDIT: Oh, and this appears to be what they're basically doing. Even though Sunny Cove itself supports AVX-512, it's being disabled in this application: "One thing we can confirm in advance – the Sunny Cove does not appear to be AVX-512 enabled."