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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/34256] mmx and movd/movq on x86_64 Date: Wed, 28 Nov 2007 12:45:00 -0000 [thread overview] Message-ID: <20071128124534.1481.qmail@sourceware.org> (raw) In-Reply-To: <bug-34256-5748@http.gcc.gnu.org/bugzilla/> ------- Comment #2 from ubizjak at gmail dot com 2007-11-28 12:45 ------- Created an attachment (id=14653) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=14653&action=view) Patch to adjust mmx move instructions It looks that mmx move instructions need some tuning. Attached patch fixes your problems and generates (-march=core2): foo: .LFB4: movq x(%rip), %mm0 paddd y(%rip), %mm0 movd %mm0, %rax ret Since these RA adjustments are very fragile, this patch is not appropriate for stage3. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34256
next prev parent reply other threads:[~2007-11-28 12:45 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2007-11-28 1:15 [Bug target/34256] New: " dean at arctic dot org 2007-11-28 1:44 ` [Bug target/34256] " dean at arctic dot org 2007-11-28 12:45 ` ubizjak at gmail dot com [this message] 2007-11-28 12:46 ` ubizjak at gmail dot com 2007-12-10 8:40 ` ubizjak at gmail dot com 2008-02-23 15:25 ` uros at gcc dot gnu dot org 2008-11-16 0:09 ` howarth at nitro dot med dot uc dot edu 2008-11-16 0:10 ` howarth at nitro dot med dot uc dot edu 2008-11-17 0:36 ` howarth at nitro dot med dot uc dot edu 2008-11-17 0:39 ` howarth at nitro dot med dot uc dot edu 2008-12-13 18:39 ` howarth at nitro dot med dot uc dot edu 2008-12-13 19:30 ` ubizjak at gmail dot com
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