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[-] nickwitha_k@lemmy.sdf.org 1 points 1 week ago

Like much of the newer x86 stuff is RISC-like wrappers on CISC instructions under the hood

I think it's actually the opposite. The actual execution units tend to be more RISC-like but the "public" interfaces are CISC to allow backwards compatibility. Otherwise, they would have to publish new developer docs for every microcode update or generational change.

Not necessarily a bad strategy but, definitely results in greater complexity over time to translate between the "external" and "internal" architecture and also results in challenged in really tuning the interfacing between hardware and software because of the abstraction layer.

this post was submitted on 09 Jun 2025
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