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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/52908] xop-mul-1:f9 miscompiled on bulldozer (-mxop)
Date: Fri, 04 May 2012 12:52:00 -0000	[thread overview]
Message-ID: <bug-52908-4-8JZVsnJbJv@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-52908-4@http.gcc.gnu.org/bugzilla/>

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52908

--- Comment #5 from Uros Bizjak <ubizjak at gmail dot com> 2012-05-04 12:51:49 UTC ---
(In reply to comment #4)

> A Quick make check on i386.exp result is shown below: 
> 
> Tests that now fail, but worked before:
> 
> gcc.target/i386/xop-imul32widen-vector.c scan-assembler vpmacsdql

This is expected, there is no need to emit vpmacsdql, IMO vpmuldq works as good
(if not even better, since we don't have to preload accumulator with zero). The
test should be either changed to really emit vpmacsdql, or asm scan should be
adjusted.

> Tests that now work, but didn't before:
> 
> gcc.target/i386/xop-mul-1.c execution test

Yes this one should be fixed with the patch.

If the change vmpacsdql -> vpmuldq is OK with you, I can commit the patch, but
I'd ask you for full bootstrap/regression test.


  parent reply	other threads:[~2012-05-04 12:52 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-08 22:48 [Bug target/52908] New: " matz at gcc dot gnu.org
2012-04-09  8:17 ` [Bug target/52908] " ubizjak at gmail dot com
2012-04-09 11:48 ` ubizjak at gmail dot com
2012-04-10 13:49 ` ubizjak at gmail dot com
2012-05-04 10:43 ` venkataramanan.kumar at amd dot com
2012-05-04 12:52 ` ubizjak at gmail dot com [this message]
2012-05-09  3:44 ` venkataramanan.kumar at amd dot com
2012-05-09 20:46 ` uros at gcc dot gnu.org
2012-05-09 20:57 ` ubizjak at gmail dot com
2012-05-10  6:22 ` ubizjak at gmail dot com
2012-06-18 15:11 ` vekumar at gcc dot gnu.org
2012-07-02 12:42 ` rguenth at gcc dot gnu.org
2024-03-17  2:33 ` sjames at gcc dot gnu.org

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