From: Richard Henderson <rth@twiddle.net>
To: Nathan Froyd <froydnj@codesourcery.com>
Cc: Juha.Riihimaki@nokia.com, qemu-devel@nongnu.org, zhur@ispras.ru
Subject: Re: WIP flush-to-zero patch [was: Re: [Qemu-devel] QEMU state of ARM NEON support.]
Date: Thu, 25 Mar 2010 09:11:12 -0700 [thread overview]
Message-ID: <4BAB8B20.4040001@twiddle.net> (raw)
In-Reply-To: <20100325140011.GT16726@codesourcery.com>
On 03/25/2010 07:00 AM, Nathan Froyd wrote:
> FWIW, below is a WIP progress patch to implement flush-to-zero better.
> The motivating observation is that many chips feature separate
> flush-input and flush-output flags and QEMU's fpu/ library only
> implements flush-output. So the bulk of the patch is:
>
> - replacing the ad-hoc unpacking of float values into (sign, exponent,
> significand) with a centralized routine that will apply flush-to-zero
> on input values;
>
> - splitting float_status.flush_to_zero into separate input/output flags;
>
> - modifying targets to set input/output flags appropriately.
Excellent. This should allow me to clean up the Alpha port a bit.
Specifically wrt helper_ieee_input*.
r~
prev parent reply other threads:[~2010-03-25 16:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-22 13:43 [Qemu-devel] QEMU state of ARM NEON support Dmitry Zhurikhin
2010-03-25 7:52 ` Juha.Riihimaki
2010-03-25 10:27 ` Dmitry Zhurikhin
2010-03-25 11:04 ` Juha.Riihimaki
2010-03-25 14:00 ` WIP flush-to-zero patch [was: Re: [Qemu-devel] QEMU state of ARM NEON support.] Nathan Froyd
2010-03-25 16:11 ` Richard Henderson [this message]
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