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[Bug target/25500] REGREGRESSION: SSE2 vectorized code is many times slower on 4.x.x than on 3.4.4
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 20 Dec 2005 06:55:21 -0000
- Subject: [Bug target/25500] REGREGRESSION: SSE2 vectorized code is many times slower on 4.x.x than on 3.4.4
- References: <bug-25500-6649@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #10 from pinskia at gcc dot gnu dot org 2005-12-20 06:55 -------
Oh, I looked a little more and yes it depends on the arch you are building for
but only for 4.x.
Since you are using SSE, you should add also -march=i686 or -march=k8 so that
the code is also tuned for the processor you are using.
Anyways the problem with i386 with 4.0 is really just PR 14295.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
BugsThisDependsOn| |14295
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25500