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Date:      Wed, 05 Jan 2000 10:36:17 -0800
From:      "Ronald F. Guilmette" <rfg@monkeys.com>
To:        Thomas David Rivers <rivers@dignus.com>
Cc:        cracauer@cons.org, freebsd-hackers@FreeBSD.ORG, saska@acc.umu.se
Subject:   Re: Should -mieee-fp equal fpsetmask(0) to avoid SIGFPE on FreeBSD? 
Message-ID:  <778.947097377@monkeys.com>
In-Reply-To: Your message of Wed, 05 Jan 2000 11:42:33 -0500. <200001051642.LAA26756@lakes.dignus.com> 

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In message <200001051642.LAA26756@lakes.dignus.com>, you wrote:

> I don't believe the C89 standard doesn't have a way to test for NaN...

That is correct, but most actual C libraries DO provide some function
that will check for that condition.

> ... so, if we're talking portability here - you can't test for NaN.

Yes, but only if you are talking about ``portability'' in its purest
form.

In practice, you could easily construct an `is_this_a_NaN()' function
that would work on all platforms of interest.


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