From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 27647 invoked by alias); 20 Dec 2005 06:19:34 -0000 Received: (qmail 27631 invoked by alias); 20 Dec 2005 06:19:32 -0000 Date: Tue, 20 Dec 2005 06:19:00 -0000 Message-ID: <20051220061932.27630.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug target/25500] REGREGRESSION: SSE2 vectorized code is many times slower on 4.x.x than on 3.4.4 In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "yuri at tsoft dot com" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2005-12/txt/msg02088.txt.bz2 List-Id: ------- Comment #5 from yuri at tsoft dot com 2005-12-20 06:19 ------- Subject: Re: REGREGRESSION: SSE2 vectorized code is many times slower on 4.x.x than on 3.4.4 Here's attachment with asms generated in both cases. testcase-old.s is 4.3.3 and testcase-new.s is 4.0.2 In testcase-new.s SSE2 code is kinda diluted with i386 assembly, notably 'rep movsl' which never occurs in 3.4.4 output. Yuri ------- Comment #6 from yuri at tsoft dot com 2005-12-20 06:19 ------- Created an attachment (id=10534) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=10534&action=view) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25500