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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Fri, 29 Jul 2016 14:58:07 +1000
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Subject: Re: [Qemu-devel] [PATCH 28/32] ppc: Avoid double translation for
 lvx/lvxl/stvx/stvxl
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To: David Gibson <david@gibson.dropbear.id.au>
Cc: Richard Henderson <rth@twiddle.net>, qemu-ppc@nongnu.org, qemu-devel@nongnu.org

On Fri, 2016-07-29 at 14:40 +1000, Benjamin Herrenschmidt wrote:
> On Fri, 2016-07-29 at 13:34 +1000, David Gibson wrote:
> >=20
> > =C2=A0
> > What should I do with this in the short term?=C2=A0=C2=A0Leave it in
> > ppc-for-2.8, or remove it for now pending possible changes?
>=20
> I think I'm still measuring a performance improvement with this, I'll
> test a bit more and will get back to you.
>=20
> It will definitely better to do it without a helper once Richard's 128-
> bit stuff is in.

Ok, after I nice'd myself on top of all the gcc's on that test machine
I confirm that this patch is a loss on qemu-user. It might still be a
win for qemu-system-ppc64 due to the translation but probably not
worth bothering.

So drop this one. I'll use the 128-bit support when it becomes
available.

Cheers,
Ben.