[michaelhoffman]

> I assume the author means "out of all the ISAs I know"?

Out of all the ISAs where they know whether it provides integer division or not.

[dataflow]

Yeah but my point is that as a reader I'm trying to figure out which ISAs actually don't provide this (vs. which ISAs the author lacks knowledge of), and I still don't know what those are. The sentence looks like it's supposed to tell me, but it doesn't.