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>Final verdict >There is some truth to the story that x86 processors decode instructions into RISC-like form internally. This was, in fact, pretty much how P6
by mikequinlan 3y ago
>Final verdict
>There is some truth to the story that x86 processors decode instructions into RISC-like form internally. This was, in fact, pretty much how P6 worked, later improvements however made the correspondence tortuous at best. Some microarchitecture families, on the other hand, never did anything of the sort, meaning it was never anywhere near a true statement for them.
- p_l 3y agoP6 was normal microcoded architecture, very much not RISC-like, though. Especially with its 143 bit long instructions and memory-memory operands. Now, K5 was a different beast, with it's "microcode" being a frontend that converted x86 to AMD29k