From: "Alex Bennée" <alex.bennee@linaro.org>
To: Janne Grunau <j@jannau.net>
Cc: Peter Maydell <peter.maydell@linaro.org>,
linaro-dev <linaro-dev@lists.linaro.org>,
Michael Matz <matz@suse.de>, Alexander Graf <agraf@suse.de>,
"linaro-toolchain@lists.linaro.org"
<linaro-toolchain@lists.linaro.org>,
qemu-devel <qemu-devel@nongnu.org>,
Wook Wookey <wookey@linaro.org>,
Christoffer Dall <Christoffer.Dall@linaro.org>
Subject: Re: [Qemu-devel] Call for testing QEMU aarch64-linux-user emulation
Date: Thu, 06 Mar 2014 11:40:47 +0000 [thread overview]
Message-ID: <8738ivd074.fsf@linaro.org> (raw)
In-Reply-To: <20140225171103.GB20660@jannau.net>
Janne Grunau <j@jannau.net> writes:
> On 2014-02-25 15:54:37 +0000, Alex Bennée wrote:
>>
<snip>
>> 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
next prev parent reply other threads:[~2014-03-06 11:40 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-17 13:40 [Qemu-devel] Call for testing QEMU aarch64-linux-user emulation Alex Bennée
2014-02-24 13:01 ` Janne Grunau
2014-02-25 15:54 ` Alex Bennée
2014-02-25 17:11 ` Janne Grunau
2014-03-06 11:40 ` Alex Bennée [this message]
2014-03-06 16:04 ` Janne Grunau
2014-02-24 20:58 ` Dann Frazier
2014-02-25 8:39 ` Alex Bennée
2014-02-25 8:49 ` Andreas Färber
2014-02-25 13:33 ` Michael Matz
2014-02-25 13:46 ` Peter Maydell
2014-02-25 14:56 ` Michael Matz
2014-02-28 14:12 ` Alex Bennée
2014-02-28 14:21 ` Peter Maydell
2014-02-28 14:27 ` Alexander Graf
2014-02-28 14:49 ` Peter Maydell
2014-02-28 17:08 ` Alex Bennée
2014-02-28 17:17 ` Peter Maydell
2014-02-26 22:06 ` Dann Frazier
2014-02-27 13:20 ` Michael Matz
2014-02-27 19:47 ` Dann Frazier
2014-03-14 14:20 ` Peter Maydell
2014-03-09 23:37 ` Dann Frazier
2014-03-09 23:51 ` Peter Maydell
2014-03-10 11:28 ` Alex Bennée
2014-03-10 11:45 ` Peter Maydell
2014-03-10 13:56 ` Michael Matz
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