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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: Wed, 13 Apr 2011 08:53:27 -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 04/13/2011 08:42 AM, Peter Maydell wrote:
> On 13 April 2011 16:38, Richard Henderson <address@hidden> wrote:
>> [ Odd, the original thread doesn't seem to have arrived here. ]
>> On 04/13/2011 07:52 AM, Peter Maydell wrote:
>>> So I think you want the _quiet version here. (And helper_cmpteq
>>> needs to use float64_eq_quiet rather than float64_eq.)
>> Yes, the _quiet version is what's needed for all comparisons.
> Really all comparisons, including CMPTLT, CMPTLE?

Oops, no.  CMPTLE and CMPTLT in Table B-2 are on the next page,
and clearly indicate that they signal InvalidOP for QNaN.

So it's just CMPTUN and CMPTEQ that should not signal on QNaN.


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