https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86866
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Component|c |target --- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> --- I think you forgot to the flush as required. The mmx programming model requires the user to do it.