http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57623
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Actually, seems the 3 argument Intel intrinsic is _bextr_u{32,64}, while the GCC intrinsic is __bextr_u{32,64}, so guess the two can coexist, we just need to add the 3 argument one.