On Fri, Jul 15, 2022 at 11:17:24AM +1000, Nicholas Piggin wrote: > Excerpts from Segher Boessenkool's message of May 25, 2022 4:32 am: > > Linux runs on ISA 1.xx and ISA 2.01 machines still. "Category" wasn't > > invented for either yet either, but similar concepts did exist of > > course. > > Not sure what to say about this. It now also has "Compliancy Subset" > although maybe that's more like a set of features rather than > incompatible features or modes such as some of the category stuff > seems to be. I'll try add something.
The compliancy subset stuff is an attempt to simplify things again. In most cases you want to require a whole swath of feature at once, if you really try to support fine-grained optional features you need to test thousands of configurations, while you really can test only ten (if you are lucky!) Maybe it is best to just be a bit vague here? Segher