Post #2170448
2026-04-03 04:03 UTC
even without going too-CISC it can make sense to have instructions for popular use cases
e.g. ARM has special instructions for optimal numeric operations in JavaScript: https://developer.arm.com/documentation/dui0801/h/A64-Floating-point-Instructions/FJCVTZS
and I thought I'd read something about custom instructions in Apple Silicon to optimise virtualisation (i.e. translation of x86_64 executables) but I can't find a source for that, maybe that secret sauce is not in the instruction set
Replies (1)
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@SlurpingPus@lemmy.world 2026-04-03 04:18
Yeah, what I've read is that ARM is in fact a mix of RISC and CISC. And meanwhile x64 processors turn some CISC instructions into a bunch of simpler ones as one of the first execution stages. So in the end the situation is basically this: 