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sehuggyesterday at 12:25 PM2 repliesview on HN

It's not the wrong design; RISC-V is designed around extensions, and they left room in the instruction encoding for them. They don't have a 800-lb gorilla like Intel shoving the ISA down customers' throats (Canonical is the closet thing) so there is some debate on which combination of extensions are needed for desktop apps.


Replies

rwmjyesterday at 1:59 PM

FWIW I wrote this article a while back all about RISC-V extensions and how they work at a low level: https://research.redhat.com/blog/article/risc-v-extensions-w... page 22 in this PDF: https://research.redhat.com/wp-content/uploads/2023/12/RHRQ_...

Joker_vDyesterday at 1:29 PM

> They don't have a 800-lb gorilla like Intel shoving the ISA down customers' throats

Nobody really forces you to use x64 if you don't like it, just as nobody forced you to use Itanium — which Intel famously failed to "shove down the customers' throats" btw.