From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56798) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WLWf8-00058K-L4 for qemu-devel@nongnu.org; Thu, 06 Mar 2014 06:40:35 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1WLWf3-0000At-MV for qemu-devel@nongnu.org; Thu, 06 Mar 2014 06:40:30 -0500 Received: from static.88-198-71-155.clients.your-server.de ([88.198.71.155]:46158 helo=socrates.bennee.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1WLWf3-0000Ap-H5 for qemu-devel@nongnu.org; Thu, 06 Mar 2014 06:40:25 -0500 References: <87sirhyi1b.fsf@linaro.org> <20140224130117.GC6747@jannau.net> <87fvn7mblu.fsf@linaro.org> <20140225171103.GB20660@jannau.net> From: Alex =?utf-8?Q?Benn=C3=A9e?= In-reply-to: <20140225171103.GB20660@jannau.net> Date: Thu, 06 Mar 2014 11:40:47 +0000 Message-ID: <8738ivd074.fsf@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Subject: Re: [Qemu-devel] Call for testing QEMU aarch64-linux-user emulation List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Janne Grunau Cc: Peter Maydell , linaro-dev , Michael Matz , Alexander Graf , "linaro-toolchain@lists.linaro.org" , qemu-devel , Wook Wookey , Christoffer Dall Janne Grunau writes: > On 2014-02-25 15:54:37 +0000, Alex Bennée wrote: >> >> Have you got the log file "unsupported" line? I seem to recall you did >> ping me but maybe it was just on IRC? I just want to make sure I >> do the right ones. I'm working on this now. > > We spoke on irc about it. a quick test commenting unsupported > instructions out revealed that rshrn/2, sqrshrun and shrn/2 are > the only NEON instructions used in libav still missing support > in qemu master. Unsoppurted lines from qemu master 0459650d94d1 > below. > > target-arm/translate-a64.c:6884: unsupported instruction encoding 0x0f0a8e10 at pc=00000000008632c8 > target-arm/translate-a64.c:6884: unsupported instruction encoding 0x2f0b8f9c at pc=0000000000865764 > target-arm/translate-a64.c:6884: unsupported instruction encoding 0x0f0a8610 at pc=0000000000863afc I've just pushed support for the various shrn opcodes to: https://github.com/stsquad/qemu/tree/ajb-a64-working I suspect if libav uses them heavily there could be some optimisation to be made as the narrow operations make heavy use of helpers to do the saturation stuff. -- Alex Bennée