From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 29369 invoked by alias); 23 Jun 2015 13:48:24 -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 Received: (qmail 29321 invoked by uid 48); 23 Jun 2015 13:48:20 -0000 From: "ramana at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/63408] [4.9/5/6 regression] GCC emits incorrect fixed->fp conversion instruction on Cortex-M4 target Date: Tue, 23 Jun 2015 13:48:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Version: 4.8.4 X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: major X-Bugzilla-Who: ramana at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: ramana at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.9.3 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-SW-Source: 2015-06/txt/msg02297.txt.bz2 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63408 --- Comment #11 from Ramana Radhakrishnan --- (In reply to Itay Perl from comment #10) > A few examples: > > a=100, b=0x7fffffff -O0: 0.0 -O3: 200.0 > a=0, b=0x7fffffff/100.0f -O0: -1.0 -O3: 1.0 > a=0, b=-0x7fffffff/100.0f -O0: 1.0 -O3: -1.0 > > Replacing vfma with vfms sounds correct to me, and returns the correct > result for the above inputs. Thanks - I'm testing a fix.