On Mon, 13 May 2024, Kewen.Lin wrote: > > In fact replacing all of X_TYPE_SIZE with a single hook might be worthwhile > > though this removes the "convenient" defaulting, requiring each target to > > enumerate all standard C ABI type modes. But that might be also a good > > thing. > > > > I guess the main value by extending from floating point types to all is to > unify them? (Assuming that excepting for floating types the others would > not have multiple possible representations like what we faces on 128bit fp).
For integer types, giving the number of bits makes sense as an interface - there isn't an issue with different modes. So I think it's appropriate for floating and integer types to have separate hooks - with the one for floating types returning a mode, and the one for integer types returning a number of bits. (And also keep the existing separate hook for _FloatN / _FloatNx modes.) That may also make for more convenient defaults (whether a target has long double wider than double is largely independent of what sizes it uses for integer types). -- Joseph S. Myers josmy...@redhat.com
