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From: "dwarak dot rajagopal at amd dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/38824] [4.4 Regression] performance regression of sse code from 4.2/4.3 Date: Tue, 10 Feb 2009 16:29:00 -0000 [thread overview] Message-ID: <20090210162859.25284.qmail@sourceware.org> (raw) In-Reply-To: <bug-38824-12873@http.gcc.gnu.org/bugzilla/> ------- Comment #20 from dwarak dot rajagopal at amd dot com 2009-02-10 16:28 ------- Paulo, (a) movaps (%rax, %rsi), %xmm0 addps %xmm0, %xmm1 (b) movaps %xmm0, %xmm1 addps (%rax, %rsi), %xmm1 Yes, case (a) is slightly better than case (b). It shouldn't matter much though in amdfam10(shanghai) processors. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38824
next prev parent reply other threads:[~2009-02-10 16:29 UTC|newest] Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top 2009-01-13 11:25 [Bug target/38824] New: [4.4 regression] " tim at klingt dot org 2009-01-13 15:07 ` [Bug target/38824] " rguenth at gcc dot gnu dot org 2009-01-13 16:22 ` tim at klingt dot org 2009-01-14 20:20 ` hubicka at gcc dot gnu dot org 2009-01-14 20:26 ` [Bug target/38824] [4.4 Regression] " rguenth at gcc dot gnu dot org 2009-01-14 20:32 ` [Bug target/38824] [4.4 regression] " hubicka at gcc dot gnu dot org 2009-01-15 0:31 ` hubicka at gcc dot gnu dot org 2009-01-15 1:26 ` hjl dot tools at gmail dot com 2009-01-15 1:49 ` hubicka at ucw dot cz 2009-01-23 16:19 ` [Bug target/38824] [4.4 Regression] " rguenth at gcc dot gnu dot org 2009-01-24 5:12 ` xuepeng dot guo at intel dot com 2009-01-24 9:56 ` tim at klingt dot org 2009-01-24 13:14 ` tim at klingt dot org 2009-01-25 17:56 ` rguenth at gcc dot gnu dot org 2009-02-06 9:16 ` bonzini at gnu dot org 2009-02-06 22:35 ` dwarak dot rajagopal at amd dot com 2009-02-07 16:18 ` rob1weld at aol dot com 2009-02-08 12:36 ` hubicka at gcc dot gnu dot org 2009-02-08 12:40 ` hubicka at gcc dot gnu dot org 2009-02-09 9:16 ` xuepeng dot guo at intel dot com 2009-02-09 13:36 ` bonzini at gnu dot org 2009-02-09 13:38 ` bonzini at gnu dot org 2009-02-10 16:29 ` dwarak dot rajagopal at amd dot com [this message] 2009-02-10 16:39 ` bonzini at gnu dot org 2009-02-11 7:37 ` xuepeng dot guo at intel dot com 2009-02-11 8:01 ` bonzini at gnu dot org 2009-02-11 8:14 ` ubizjak at gmail dot com 2009-02-11 8:58 ` bonzini at gnu dot org 2009-02-12 15:45 ` hjl at gcc dot gnu dot org 2009-02-16 9:15 ` bonzini at gnu dot org 2009-03-12 16:01 ` hjl dot tools at gmail dot com 2009-03-12 16:08 ` hjl at gcc dot gnu dot org 2009-03-12 20:22 ` hjl dot tools at gmail dot com
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