https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100809
--- Comment #4 from Michael Meissner <meissner at gcc dot gnu.org> --- Note, in looking at Carl's patch, it is only for adding the built-ins. I don't believe it adds direct support for {,u}divti3 and {,u}moddti3 to implement these for normal __int128 variables.