From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 1738 invoked by alias); 4 Mar 2011 13:11:34 -0000 Received: (qmail 1655 invoked by uid 22791); 4 Mar 2011 13:11:33 -0000 X-SWARE-Spam-Status: No, hits=-2.8 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 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; Fri, 04 Mar 2011 13:11:27 +0000 From: "m.lazzarotto at robox dot it" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/47977] powerpc (-mcpu=8548) Wrong code for double operations in little endian mode X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: m.lazzarotto at robox dot it 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: Component 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 Date: Fri, 04 Mar 2011 13:11:00 -0000 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: 2011-03/txt/msg00400.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47977 Marco Lazzarotto changed: What |Removed |Added ---------------------------------------------------------------------------- Component|target |c --- Comment #3 from Marco Lazzarotto 2011-03-04 13:11:21 UTC --- (In reply to comment #1) > Using --enable-e500-double for a non-e500 target will produce a broken > compiler. So if you want e500 double code to work at all, try the > powerpc-eabispe target. (Or else pass -mabi=spe explicitly.) My target is effectively an e500v2. I also tried to pass -mabi=spe, with no difference in the output. Is using --enable-e500-double compile-time equivalent to use -mdouble-float runtime? > It is also known that all the insn patterns for e500 are only expected to work > for big-endian. In general little-endian Power is hardly tested at all, but > the SPE case is specifically expected to be broken. Ok, it's time to test it! :-(