From: Peter Maydell <peter.maydell@linaro.org>
To: Xiangyu Hu <libhu.so@gmail.com>
Cc: QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH] Fix FMULX not squashing denormalized inputs when FZ is set.
Date: Thu, 29 Jan 2015 19:20:22 +0000 [thread overview]
Message-ID: <CAFEAcA8P937NoWmx88EdmS=mGL16B=Pn7-FdgVX2ne-B1cZjqw@mail.gmail.com> (raw)
In-Reply-To: <1422459650-12490-1-git-send-email-libhu.so@gmail.com>
On 28 January 2015 at 15:40, Xiangyu Hu <libhu.so@gmail.com> wrote:
> While FMULX returns a 2.0f float when two operators are infinity and
> zero, those operators should be unpacked from raw inputs first. Inconsistent
> cases would occur when operators are denormalized floats in flush-to-zero
> mode. A wrong codepath will be entered and 2.0f will not be returned
> without this patch.
> Fix by checking whether inputs need to be flushed before running into
> different codepaths.
>
> Signed-off-by: Xiangyu Hu <libhu.so@gmail.com>
Applied to target-arm.next, thanks.
It looks like we have equivalent bugs in the FRECPS and
FRSQRTS instructions...
-- PMM
prev parent reply other threads:[~2015-01-29 19:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-28 15:40 [Qemu-devel] [PATCH] Fix FMULX not squashing denormalized inputs when FZ is set Xiangyu Hu
2015-01-29 19:20 ` Peter Maydell [this message]
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