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rbanffy 7 hours ago

> At this point the most likely place for fast RISC-V to appear is China.

Or we just adopt Loongson.

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balou23 7 hours ago | parent | next [-]

TBH I still don't really get how it's different from MIPS. As far as I can tell... Loongson seems to be really just MIPS, while LoongArch is MIPS with some extra instructions.

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bonzini 6 hours ago | parent | next [-]

LoongArch is, on a first approximation, an almost RISC-V user space instruction set together with MIPS-like privileged instructions and registers.

	▲	mananaysiempre 4 hours ago \| parent [-]
		Wait, this is a modern-ish ISA with a software-managed TLB, I didn’t realize that! The manual seems a bit unhappy about that part though: > In the current version of this architecture specification, TLB refill and consistent maintenance between TLB and page tables are still [sic] all led by software. https://loongson.github.io/LoongArch-Documentation/LoongArch...

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pantalaimon 6 hours ago | parent | prev | next [-]

They did get rid of the delay slots and some other MIPS oddities

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mananaysiempre 7 hours ago | parent | prev [-]

But legally distinct! I guess calling it Ｍ○ＰＳ was not enough for plausible deniability.

	▲	genxy 7 hours ago \| parent [-]
		ISAs shouldn't be patentable in the first place.

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throawayonthe 6 hours ago | parent | prev [-]

(purely on vibes) loongson feels to me like an intermediate step/backup strategy rather than a longterm target (though they'll probably power govt equipment for decades of legacy either way :p)