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From: "hjl dot tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/36992] Very stange code for _mm_move_epi64
Date: Fri, 01 Aug 2008 12:57:00 -0000 [thread overview]
Message-ID: <20080801125556.32126.qmail@sourceware.org> (raw)
In-Reply-To: <bug-36992-682@http.gcc.gnu.org/bugzilla/>
------- Comment #5 from hjl dot tools at gmail dot com 2008-08-01 12:55 -------
(In reply to comment #3)
> Btw, 4.3 generates
>
> test:
> .LFB518:
> movhps .LC0(%rip), %xmm0
> ret
>
> Likewise does gcc-4.4 (SUSE Linux) 4.4.0 20080611. And current trunk.
It should be
movq %xmm0, %xmm0
with optimization.
>
> So ... why are you exactly complaining about the code generated for -O0 again?
>
It should use "movq". There is no need to use MMX moves, like
"movq %mm0, -40(%rbp)".
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36992
next prev parent reply other threads:[~2008-08-01 12:57 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-01 3:30 [Bug target/36992] New: " hjl dot tools at gmail dot com
2008-08-01 11:59 ` [Bug target/36992] " rguenth at gcc dot gnu dot org
2008-08-01 12:05 ` rguenth at gcc dot gnu dot org
2008-08-01 12:08 ` rguenth at gcc dot gnu dot org
2008-08-01 12:54 ` hjl dot tools at gmail dot com
2008-08-01 12:57 ` hjl dot tools at gmail dot com [this message]
2008-08-01 13:22 ` rguenth at gcc dot gnu dot org
2008-08-01 13:27 ` hjl dot tools at gmail dot com
2008-08-01 19:34 ` ubizjak at gmail dot com
2008-08-02 13:10 ` ubizjak at gmail dot com
2008-08-02 13:11 ` ubizjak at gmail dot com
2008-08-02 13:23 ` ubizjak at gmail dot com
2008-08-02 15:08 ` ubizjak at gmail dot com
2008-08-02 15:20 ` hjl dot tools at gmail dot com
2008-08-02 16:03 ` ubizjak at gmail dot com
2008-08-02 18:45 ` ubizjak at gmail dot com
2008-08-03 6:15 ` uros at gcc dot gnu dot org
2008-08-03 6:50 ` ubizjak at gmail dot com
2008-08-05 14:20 ` hjl dot tools at gmail dot com
2008-08-05 17:35 ` hjl dot tools at gmail dot com
2008-08-05 17:42 ` hjl at gcc dot gnu dot org
2008-08-07 13:18 ` hjl at gcc dot gnu dot org
2008-08-07 13:19 ` hjl dot tools at gmail dot com
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