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Re: [PATCH, Atom] Fix performance regression with -mtune=atom
- From: Uros Bizjak <ubizjak at gmail dot com>
- To: gcc-patches at gcc dot gnu dot org
- Cc: Vladimir Yakovlev <vbyakovl23 at gmail dot com>
- Date: Fri, 14 Oct 2011 15:03:16 +0200
- Subject: Re: [PATCH, Atom] Fix performance regression with -mtune=atom
Hello!
> This is a ping. Change affects Atom only and was made because it
> really gives better performance on this architecture. This fact
> actually leads to the thought that old value is just a simple
> misprint.
>
> > This patch fixes performance regression with -mtune=atom. Changing
> > atom cost removes regression in several tests of EEMBC and spec2000.
> > Bootstrap amd make check Ok for both with and witout -mtune-atom.
> > OK for trunk?
> >
> > 2011-09-30 ?Yakovlev Vladimir ?vladimir.b.yakovlev@intel.com
> >
> > ? ? ?* gcc/config/i386/i386.c (atom_cost): Changed cost for loading
> > ? ? ? QImode using movzbl.
OK.
Thanks,
Uros.