From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 3687 invoked by alias); 22 Sep 2011 20:48:30 -0000 Received: (qmail 3678 invoked by uid 22791); 22 Sep 2011 20:48:29 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,TW_CP X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 22 Sep 2011 20:48:16 +0000 From: "hjl.tools at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug testsuite/50485] gcc.target/i386/sse4_1-blendps.c fails spuriously on i686 Date: Thu, 22 Sep 2011 21:09:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: testsuite X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: hjl.tools at gmail dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2011-09/txt/msg01592.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50485 --- Comment #3 from H.J. Lu 2011-09-22 20:47:01 UTC --- (In reply to comment #0) > > The assignment is translated as a push/pop on the float stack: > ... ... > > So after the push/pop tmp[1] contains a quiet Nan, while the corresponding part > of dst contains the bit representation of the signalling Nan, the memcmp > returns != 0 and the test aborts. I think it is wrong to convert memcpy to push/pop here.