https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63218
--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to Marc Glisse from comment #3) > (In reply to H.J. Lu from comment #2) > > X32 also wants long long. > > Is there a good way to ask for the longest of the integer types that are > fast? stdint.h has things like int_fastN_t (btw, I don't like some of the > choices I see for them in glibc (probably imposed by the ABI though)), but > this is a different question. That may not be so well-defined though. typedef int word_type __attribute__ ((mode (__word__))); is the closest thing I can think of.