http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50441
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-09-17 20:33:31 UTC --- (In reply to comment #4) > In terms > of operations, at some point for sure the extended integer types *Ahem!* __int128 is not an extended integer type! GCC does not support any extended integer types! :) http://gcc.gnu.org/onlinedocs/gcc/Integers-implementation.html