Reply to post: Re: Computer says "No"

Now Microsoft ports Windows 10, Linux to homegrown CPU design

MacroRodent Silver badge
Boffin

Re: Computer says "No"

The concept of RISC (as I recall) was to get closer to the microcode to streamline the instruction pipeline and reduce the size (etc.) of the core, though it's not the same thing as BEING microcode.

The original RISC architectures like MIPS and SPARC did not use microcode at all. In that sense, the user-visible instructions were the microcode. Being able to avoid microcode is the main benefit of having simple and regularly encoded fixed-length instructions. I am not sure if any later implementations of these architectures use it.

I don't recall MIPS or ARM _EVER_ being faster than the high-end x86's.

In the 1990's, RISC processors generally ran circles around Intel's 486 and the original Pentium. I am not sure when the tables turned. Maybe around the time when Pentium III was introduced. Should did up old benchmarks.

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