This is the mail archive of the
gcc@gcc.gnu.org
mailing list for the GCC project.
Re: IEEE inexact-flag not working on the Alpha (despite -mieee-with-inexact)?
- From: Andreas Schwab <schwab at suse dot de>
- To: Roberto Bagnara <bagnara at cs dot unipr dot it>
- Cc: gcc at gcc dot gnu dot org, "The Parma Polyhedra Library developers' list" <ppl-devel at cs dot unipr dot it>
- Date: Thu, 18 Sep 2008 14:09:54 +0200
- Subject: Re: IEEE inexact-flag not working on the Alpha (despite -mieee-with-inexact)?
- References: <48D23D14.2030006@cs.unipr.it>
Roberto Bagnara <bagnara@cs.unipr.it> writes:
> $ cat sf.cc
> #include <fenv.h>
> #include <cstdio>
>
> int main() {
> float x = 2;
> float y = 3;
> feclearexcept(FE_INEXACT);
> x = x / y;
> printf("%d %.1000g\n", fetestexcept(FE_INEXACT) != 0, x);
You need to enable the FENV_ACCESS pragma (which is not yet implemented)
to get defined behaviour.
Andreas.
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."