From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41153) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YOpte-0000jl-Jw for qemu-devel@nongnu.org; Fri, 20 Feb 2015 10:53:43 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YOptb-0003VL-7U for qemu-devel@nongnu.org; Fri, 20 Feb 2015 10:53:42 -0500 Received: from mail-qa0-x232.google.com ([2607:f8b0:400d:c00::232]:58568) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YOptb-0003V0-3o for qemu-devel@nongnu.org; Fri, 20 Feb 2015 10:53:39 -0500 Received: by mail-qa0-f50.google.com with SMTP id f12so12996957qad.9 for ; Fri, 20 Feb 2015 07:53:38 -0800 (PST) Sender: Richard Henderson Message-ID: <54E7587E.1000807@twiddle.net> Date: Fri, 20 Feb 2015 07:53:34 -0800 From: Richard Henderson MIME-Version: 1.0 References: <1424380469-20138-1-git-send-email-rth@twiddle.net> <1424380469-20138-11-git-send-email-rth@twiddle.net> In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 10/11] target-arm: Implement fccmp branchless List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Laurent Desnogues Cc: Peter Maydell , "qemu-devel@nongnu.org" On 02/20/2015 05:57 AM, Laurent Desnogues wrote: > The problem with this approach is that you'll always call the FP > compare which might result in FP flags corruption. > > The ARMv8 manual clearly states that the FP compare should only be > called if the condition holds. Ah, I hadn't considered that. Consider this patch dropped. Thanks, r~