Subj : Re: Floating point exceptions
To   : borland.public.cpp.borlandcpp
From : Mohsen
Date : Wed Jan 19 2005 01:42 pm


lotter_NO_SpaM_@zsw-bw.de (Erwin Lotter) wrote:
>Hi all,
>
>I have trouble with floating point exceptions of type 'Invalid
>operation' which occure after comparing a NAN with some other value.
>I have installed a signal() handler which catches and resolves the
>exception (and sets the signal handler again). But after the first
>occurance of such an exception, the fpu throws floating point
>exceptions even on legal operations. And, the subsequent exception is
>not guided to my exception handler. Instead, it is caught by the
>debugger.
>I have tried to call _clear87() and/or _fpreset() with no success.
>Does anybody have an idea what might be going wrong?
>
>Thanks
>
>Erwin Lotter

Other exceptions might come from math functions such as sqrt().
If that's the problem check with _matherr().

Mohsen

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