5 ms·

The threat was regarding emulation. Rosetta 2 isn't emulation, it's translation.

• erik 6y ago
  Rosetta 2 includes both ahead-of-time translation and run-time emulation. It can run x64 jit software for example.
  • coldtea 6y ago
    The jit is run-time translation still - not run-time emulation.
    • dtech 6y ago
      Can you provide a definition that specifies the difference? The end result is identical: being able to run software compiled for foreign ISA.
      • coldtea 6y ago
        It doesn't emulate a whole CPU and has the simulated CPU run the code. It translates instructions directly to the different ISA.
    • saagarjha 6y ago
      That is literally how performant emulators work.
      • coldtea 6y ago
        At that level though, emulation/translation/simulation is blurred.
        • saagarjha 6y ago
          Somewhat, they're really not exclusive. You could say Rosetta is an x86 emulator that uses AOT binary translation and JIT compilation.
• buzzerbetrayed 6y ago
  So why does Microsoft go the translation route instead of emulation?
  • CalChris 6y ago
    Rosetta 2 is running on an Apple chip which they’ve designed to have an X86 strong memory model mode. Microsoft has to run on off the shelf ARMv8 chips.
  • nanagojo 6y ago
    They don't make their chips like Apple.