https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109407
--- Comment #2 from johgjc <johgjc at yeah dot net> --- thank you very much. At 2023-04-04 23:55:25, "pinskia at gcc dot gnu.org" <gcc-bugzi...@gcc.gnu.org> wrote: >https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109407 > >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> --- >The inline-asm is incorrect as the EAX/RAX register gets clobbered by cmpxchgl >So you need something like (which works now): > >int tmp; >__asm__ __volatile__( > "lock;" > "cmpxchgl %[NEW_VALUE], %[DST];" > "sete %[RET];" > : [RET] "=q"(dwRtnV),[DST] "+m"(dwOriV) > , "=a"(tmp) // newly added > :[NEW_VALUE] "r"(dwDstV), "a"(dwExpV) > : "memory", "cc" >); > >-- >You are receiving this mail because: >You reported the bug.
