![]() Some stuff might need to be reprogrammed because it works well on an x86 chip but on ARM the same operation is too slow so they need to try alternative approaches. Some stuff just needs to run through a different compiler and it should work right away. It will not be that easy to make it compatible with the new chip Rosetta 2 sounds like a dead fish from the get go or will only work with very basic programs. So an ARM emulator just needs to map the arm instructions to the relevant x86 instructions while an x86 emulator maps a few instructions that are common and then has to provide software decoding to take complex x86 instructions and break them down into simpler operations that can be mapped into the ARM. ARM basically has a small set of instructions available while x86 has a lot of complex instructions burnt into the silicone. ![]() ![]() You see ARM and x86 are fundamentally different in the way they handle operations. ![]() ![]() Remember that Microsoft spent years trying to make that work and then Google gave it a go and then said it wasn't worth the investment. While ARM emulators on x86 run decently (most phone/app apps are tested on PCs before being installed on a phone) I have never seen a x86 emulator run well on ARM. Isn't that precisely why Apple announced Rosetta 2? ![]()
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