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Reason077
on Dec 25, 2020
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The impact of Apple Silicon Macs on Broadway
Apple put some special sauce in the M1 to help make rosetta fast. Support for the x86 TSO memory model, for one thing.
marcan_42
on Dec 25, 2020
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Also ARM now has a bunch of instructions that are blatantly there for efficient x86 emulation, though ARM won't tell you that in the docs.
jtl999
on Dec 25, 2020
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IBM POWER9 supports some memory ordering instructions that (as I understand) would in theory be useful for x86 emulation, but a) I'm unsure if anyone actually uses them and b) They are removed from POWER10
saagarjha
on Dec 25, 2020
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I don't think Apple generates those, though.
gandutraveler
on Dec 25, 2020
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Can that secret sauce just be to slow down Intel based macs in the OS layer?
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