https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64991
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |INVALID
Status|UNCONFIRMED |RESOLVED
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
There is no way to do lock prefix to the SSE instructions so you need to do a
compare and exchange loop as you need to make sure the value has been updated
atomically. That is no other changes happened to that memory location after the
load/addition happens.
