From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 835 invoked by alias); 18 Sep 2008 19:03:51 -0000 Received: (qmail 826 invoked by uid 22791); 18 Sep 2008 19:03:50 -0000 X-Spam-Check-By: sourceware.org Received: from ik-out-1112.google.com (HELO ik-out-1112.google.com) (66.249.90.180) by sourceware.org (qpsmtpd/0.31) with ESMTP; Thu, 18 Sep 2008 19:03:13 +0000 Received: by ik-out-1112.google.com with SMTP id c30so56079ika.0 for ; Thu, 18 Sep 2008 12:03:11 -0700 (PDT) Received: by 10.210.65.17 with SMTP id n17mr5359226eba.151.1221764591111; Thu, 18 Sep 2008 12:03:11 -0700 (PDT) Received: by 10.210.63.19 with HTTP; Thu, 18 Sep 2008 12:03:11 -0700 (PDT) Message-ID: <6dc9ffc80809181203g3e7b67ccm35bfc86f80c27fc2@mail.gmail.com> Date: Thu, 18 Sep 2008 19:03:00 -0000 From: "H.J. Lu" To: "H.J. Lu" , GDB Subject: Re: PATCH: Extend gdb remote protocol for AVX In-Reply-To: <20080918183402.GA22646@caradoc.them.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20080918172728.GA12703@lucon.org> <20080918183402.GA22646@caradoc.them.org> X-IsSubscribed: yes Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org X-SW-Source: 2008-09/txt/msg00391.txt.bz2 On Thu, Sep 18, 2008 at 11:34 AM, Daniel Jacobowitz wrote: > On Thu, Sep 18, 2008 at 10:27:28AM -0700, H.J. Lu wrote: >> b. If remote target supports AVX: >> i. Don't send xmlarch. >> ii. Replace 128bit xmm registers with 256bit ymm registers in >> the g/G packet. >> iii. Gdb will auto-detect SSE unit on remote target, based on the >> the g/G packet size. > > Just a general note: I would much prefer you use the XML mechanism for > this, either by an architecture name or a property or an explicit > register description, than add more guesses to the g/G packet checks; > they're a heuristic for existing remote targets. > I tried adding xmlarch to regformats files. But I don't want to add new xmlarch entry for AVX since I had to create a new arch entry in BFD for it. It isn't necessary for this purpose. If I use the existing xmlarch, like i386:x86-64, it will match regformats/reg-x86-64.dat. Using the g/G packet size allows me not to add a new arch entry in BFD. Is there a way to do it with XML without changing BFD? Thanks. -- H.J.