FEX

Rosetta 2 Isn’t a Translator. It’s a Hardware Cheat Code.

Everyone thinks the bottleneck in x86 emulation is instruction decoding. It’s not. The real nightmare is memory ordering. Apple solved this six years ago by adding x86-compatible memory modes directly into their silicon—a hardware cheat code that software-only emulators like FEX and Microsoft Prism can’t engineer around.