From octave-sources-request at bevo dot che dot wisc dot edu  Mon Jul 24 17:06:59 2000
Subject: Re: Patch for nan/inf support without HAVE_*... 
From: Edward Jason Riedy <ejr at EECS dot Berkeley dot EDU>
To: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
cc: octave-sources at bevo dot che dot wisc dot edu
Date: Mon, 24 Jul 2000 15:06:57 -0700

And "John W. Eaton" writes:
 - I think it is reasonable to assume that a system that has complete
 - support for IEEE floating point would provide isnan and isinf or
 - finite, so I don't have a problem with the current implementation.

Fair enough.  I also didn't notice that configure.in checked for 
pretty much every fp-related header file...  I poked through the
mailing list archives, documentation, and FAQ and didn't see any
discussion.

 - In that case, something like
 -   double tmp = 2.0 * x;
 - will trap if x is NaN or Inf.

Ah, that's what I was afraid of.  Oh well.  Wish we had the space
to keep around a collection of broken FP boxes.

Thanks for the reply.  You can still remove most of the HAVE_*
checks, though.  And add relevant comments...  I'll try to send
a patch for those two sometime this week, if you're interested.

Jason



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