Use of vector instructions in memmov/memset expanding

[Andi Kleen]

On Wed, Sep 28, 2011 at 02:54:34PM +0200, Jan Hubicka wrote:
> > > Do you know glibc version numbers when
> > > the optimized string functions was introduced?
> > 
> > Afaik, it's 2.13.
> > I also compared my implementation to 2.13.
> 
> I wonder if we can assume that most of GCC 4.7 based systems will be glibc 2.13
> based, too.  I would tend to say that yes and thus would suggest to tamn down
> inlining that is no longer profitable on newer glibcs with a note in
> changes.html...

You could add a check to configure and generate based on that?

BTW I know that the tables need tuning for Nehalem and Sandy Bridge too.
Michael are you planning to do that?

-Andi