https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101953
--- Comment #13 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Newer PowerPC does: fctiwz 0,0 ; int fctiwuz 0,0 ;unsigned Older PPC does: fctiwz 0,0 ; int fctidz 0,0 ; unsigned So it depends on which generation of PowerPC ISA you use.