TBH I still don't really get how it's different from MIPS. As far as I can tell....

pantalaimon · 2026-03-10T21:38:50 1773178730

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

bonzini · 2026-03-10T21:47:41 1773179261

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

mananaysiempre · 2026-03-10T23:35:40 1773185740

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...

bonzini · 2026-03-11T07:28:59 1773214139

I think they have already added hardware page table walks.

https://lwn.net/Articles/932048/

mananaysiempre · 2026-03-10T20:57:28 1773176248

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

genxy · 2026-03-10T21:15:35 1773177335

ISAs shouldn't be patentable in the first place.