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Re: where() and IEEE NaN [message #17717]

Mon, 08 November 1999 00:00

korpela
Messages: 59
Registered: September 1993

Member

In article <806t4k$mt0@post.gsfc.nasa.gov>,
William Thompson <thompson@orpheus.nascom.nasa.gov> wrote:
> I thought the only platform that wasn't IEEE compliant was OpenVMS, where the
> VAX floating point notation doesn't included NaN values.

There are also problems on many X86 platforms, where one usually has to set
a compiler flag in order to get IEEE compatibile code out of the compilers.
I'm pretty sure the Windows version is not compliant. Don't know about the
linux versions.

> Actually, the comment that the above command is confusing to people who don't
> know what's going on is valid. Vincenzo's suggestion of using FINITE(/NaN) is
> probably better, and should be (at least) just as fast.

Point taken. I'll b&m about any numerical software that doesn't at least make
the attempt to be IEEE compliant, or at least consistant across platforms.

Eric
--
Eric Korpela | An object at rest can never be
korpela@ssl.berkeley.edu | stopped.
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[Message index]

		Re: where() and IEEE NaN By: korpela on Mon, 08 November 1999 00:00
		Re: where() and IEEE NaN By: badastro on Mon, 08 November 1999 00:00
		Re: where() and IEEE NaN By: Pavel Romashkin on Mon, 08 November 1999 00:00
		Re: where() and IEEE NaN By: thompson on Mon, 08 November 1999 00:00
		Re: where() and IEEE NaN By: jsb on Thu, 11 November 1999 00:00
		Re: where() and IEEE NaN By: korpela on Sat, 06 November 1999 00:00
		Re: where() and IEEE NaN By: Vincenzo Andretta on Sat, 06 November 1999 00:00
		Re: where() and IEEE NaN By: davidf on Fri, 05 November 1999 00:00
		Re: where() and IEEE NaN By: davidf on Fri, 05 November 1999 00:00
		Re: where() and IEEE NaN By: Pavel Romashkin on Fri, 05 November 1999 00:00
		Re: where() and IEEE NaN By: thompson on Fri, 05 November 1999 00:00
		Re: where() and IEEE NaN By: T Bowers on Fri, 05 November 1999 00:00
		Re: where() and IEEE NaN By: badastro on Fri, 05 November 1999 00:00
		Re: where() and IEEE NaN By: davidf on Fri, 05 November 1999 00:00
		Re: where() and IEEE NaN By: korpela on Fri, 05 November 1999 00:00

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