https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69295
--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #10) > Does -ffloat-store help on ppc64 though? I believe that target doesn't have > excess precision... Perhaps fma is used somewhere (can you objdump -dr > check_value.exe | grep madd ?)? No idea if it is possible to disable fma on > powerpc though. You're right, it doesn't help on ppc64, and objdump shows fmadd instructions.