3 ms·

I think that the legal requirements will depend on the precise instructions - eg your linked article mentions SIMD. Certainly the basic x86-64 extension to x86

I think that the legal requirements will depend on the precise instructions - eg your linked article mentions SIMD. Certainly the basic x86-64 extension to x86 originated at AMD who (due to cross license deals) licenses them to Intel but things like AVX are Intel. I suspect that code emitted by Xcode omits these newer instructions. Bear in mind too that a lot of the x86 patents will have expired by now.

saagarjha 6y ago
Xcode will emit those if you ask for it, and macOS ships some binaries that use those instructions. However, Rosetta doesn't do AVX.
- klelatti 6y ago
  Interesting. How does Rosetta deal with apps with AVX then?
  - wmf 6y ago
    Such apps will use CPUID to detect that AVX is not implemented and they won't use any AVX instructions.
    - klelatti 6y ago
      Of course. So Rosetta will simply follow the non AVX path.