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Date: Tue, 25 Feb 2014 18:11:03 +0100
From: Janne Grunau <j@jannau.net>
Message-ID: <20140225171103.GB20660@jannau.net>
References: <87sirhyi1b.fsf@linaro.org> <20140224130117.GC6747@jannau.net>
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Subject: Re: [Qemu-devel] Call for testing QEMU aarch64-linux-user emulation
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To: Alex =?iso-8859-1?Q?Benn=E9e?= <alex.bennee@linaro.org>
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>

On 2014-02-25 15:54:37 +0000, Alex Benn=E9e wrote:
>
> >> Feedback I'm interested in
> >> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D
> >>
> >> * Any instruction failure (please include the log line with the
> >>   unsupported message)
> >
> > Neon support is not complete enough to run the hand written neon
> > assembler optimizations in libav. Currently failing on narrowing shif=
ts.
> <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 0x0f0a8=
e10 at pc=3D00000000008632c8
target-arm/translate-a64.c:6884: unsupported instruction encoding 0x2f0b8=
f9c at pc=3D0000000000865764
target-arm/translate-a64.c:6884: unsupported instruction encoding 0x0f0a8=
610 at pc=3D0000000000863afc

Janne