https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98207
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The default is to use fused multiple add.
If you don't want to use FMA, then use -ffp-contract=off (the default =fast).
x84_64 by default does not have a fused-multiple-add instruction without extra
options (to enable the ISA for fused multiple add instruction).
