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Date: Thu, 25 Mar 2010 09:11:12 -0700
From: Richard Henderson <rth@twiddle.net>
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Subject: Re: WIP flush-to-zero patch [was: Re: [Qemu-devel] QEMU state of
	ARM	NEON support.]
References: <4BA7741F.60209@ispras.ru>	<372ED49D-DF43-4E6C-AA3D-F4DA95746981@nokia.com>
	<20100325140011.GT16726@codesourcery.com>
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To: Nathan Froyd <froydnj@codesourcery.com>
Cc: Juha.Riihimaki@nokia.com, qemu-devel@nongnu.org, zhur@ispras.ru

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~