https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106831
--- Comment #8 from Aldy Hernandez <aldyh at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #7) > I guess disabling them at least for now could be fine. > If somebody involved with dfp wants to extend it for dfp, it can be done > incrementally. > > BTW, thinking further about the singletons, I wonder if MODE_COMPOSITE_P > don't have similar problems. For the case where the values are exactly equal > to their MSB (i.e. the __ibm128 value is equal to that value cast to double > and back), then the low part can be either +0.0 or -0.0. Ditto for +Inf and > -Inf. > So there can be quite a few non-singleton values. > libgcc/config/rs6000/ibm-ldouble-format describes it. Eeech, could you come up with a patch for that one? Consider it preapproved :-/. I'm afraid to mess it up. In the meantime I think I'll disable decimal floats for frange.
