It’s lovely to think some x86 CPUs have a nice ISA buried under the layers of cruft that form a recent x86 ISA.
I still remember the time when mnemonics were 2 or 3 characters. Good days.
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They still do! AMD Zen cores use RISC86, I documented it a little bit here:
https://github.com/google/security-research/blob/master/pocs...