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Re: [gfortran] patch for PR 15292 missing round and roundf
On Mon, Jun 14, 2004 at 12:52:41PM +0200, Paolo Bonzini wrote:
> >(2) We can include a implementation of fpclassify(). I don't have
> > such code.
> if (x != x) can be used to check for NaN.
> if (x - x != 0.0) can be used to check for NaN or infinity.
> if (x + x == x) can be used to check for infinity or zero.
Isn't fpclassify supposed not to generate any exceptions though?
The second test will generate invalid exception while fpclassify
will not (plus if one of the arguments is sNaN all 3 will throw
exception while sNaN will not.