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Re: [Qemu-devel] [PATCH 08/19] target-alpha: use new float64_unordered()

From: Richard Henderson
Subject: Re: [Qemu-devel] [PATCH 08/19] target-alpha: use new float64_unordered() function
Date: Thu, 14 Apr 2011 10:01:54 -0700
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv: Gecko/20110307 Fedora/3.1.9-0.39.b3pre.fc14 Thunderbird/3.1.9

On 04/14/2011 09:48 AM, Peter Maydell wrote:
> Or the other approach would be to do something like
> how the 'denormal-input-went-to-zero' case is handled: have
> an extra float_flag for float_flag_output_denormal, and let
> targets either (a) special-case it or (b) merge it with
> whichever of underflow or inexact they like when constructing
> the guest-visible floating point status flags. I kind of like
> that better, actually.

Either of your proposed solutions works for me.

Either allows significant freedom in the backend to decide on
how to implement the per-instruction selection.


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