[Qemu-devel] Re: [RfC PATCH 08/11] spice: add qxl device

[Blue Swirl]

On 4/15/10, Paolo Bonzini <address@hidden> wrote:
> On 04/14/2010 06:52 PM, Blue Swirl wrote:
>
> > On 4/14/10, Gerd Hoffmann<address@hidden>  wrote:
> >
> > >  +static inline void atomic_or(uint32_t *var, uint32_t add)
> > >  +{
> > >  +   __asm__ __volatile__ ("lock; orl %1, %0" : "+m" (*var) : "r" (add)
> : "memory");
> > >  +}
> > >
> >
> > This will break on non-x86 hosts.
> >
>
>  I'd just use __sync_fetch_and_or here.

And on environments without __sync_fetch_and_or? Where is that available?