From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 31893 invoked by alias); 23 Apr 2012 09:38:02 -0000 Received: (qmail 31798 invoked by uid 22791); 23 Apr 2012 09:38:01 -0000 X-SWARE-Spam-Status: No, hits=-4.3 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00,KHOP_THREADED 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; Mon, 23 Apr 2012 09:37:49 +0000 From: "bugdal at aerifal dot cx" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/52451] gcc w/i387 float generates fucom rather than fcom for floating point comparsons Date: Mon, 23 Apr 2012 09:38:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: bugdal at aerifal dot cx X-Bugzilla-Status: WAITING 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: 2012-04/txt/msg01901.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52451 --- Comment #3 from Rich Felker 2012-04-23 09:37:45 UTC --- Compiling with the -mno-ieee-fp option fixes this bug. It seems like the behavior of this option is reversed from the documentation; -mno-ieee-fp gives IEEE conformant comparisons (raising exception on unordered) and -mieee-fp gives non-conformant comparisons (silent on unordered)...