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0 pointsjaytaylor4y ago0 comments

I was surprised to find the top gOggle hits for "RISC-V fusion" (because I don't know WTF it even is) point to HN threads. Is this not discussed prominently elsewhere on the 'net?

https://news.ycombinator.com/item?id=25554865

https://news.ycombinator.com/item?id=25554779

Is the Googrilla search engine really is starting to suck more and more, or is there something else going on in this case?

The threads read more like a incomplete explanation with a polarized view than anything useful for understanding what fusion means in this context.

Overall is give the ranking a score of D-.

0 comments

mananaysiempre4y ago

> ... is there something else going on in this case?

There is: the term comes from general CPU design terminology and is not specific to RISC-V, although Google does find some RISC-V-specific materials for me given your query[1–3]. Look for micro- and macro-op fusion in Agner Fog’s manuals[4] or Wikichip[5], for example.

[1]: https://riscv.org/wp-content/uploads/2016/07/Tue1130celio-fu...

[2]: https://reviews.llvm.org/D73643

[3]: https://erik-engheim.medium.com/the-genius-of-risc-v-micropr...

[4]: https://www.agner.org/optimize/#manuals

[5]: https://en.wikichip.org/wiki/macro-operation_fusion

mda4y ago

Try 'risc V instructuin fusion" or "Risc V macro op fusion' Not that hard really. It is a well known subject.

I hope people could stop whining everytime they mess up a search query.

ksec4y ago

>I hope people could stop whining everytime they mess up a search query.

I dont know. I have never seen anyone using the term "Fusion" by itself, may be it is specific to RISC-V crowd? It is always "macro-op fusion". So your parent 's search parameter isn't something out of order for someone how knows very little about hardware. And HN are full of Web developers so abstracted in the hierarchy they knows practically zero about hardware.

And to be quite frankly honest the GP's point about Fusion had me confused for a sec as well.

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