gfortran45 IEEE exceptions are in the manual, but not supported?

[Anton Shterenlikht]

On Fri, Feb 25, 2011 at 09:01:15AM +0000, Anton Shterenlikht wrote:
> On Thu, Feb 24, 2011 at 05:01:11PM +0100, FX wrote:
> > > ia64 4.5:
> > > 	http://seis.bris.ac.uk/~mexas/ia64-portbld-freebsd9.0-libgfortran-4.5-config.log
> > 
> > OK, so the library function is detected, but that result isn't used as it should. I think I botched the configure test, so the bug was always there (I was the one who wrote this initially, so I apologise!).
> > Can you try the attached patch? You don't need to rebuild the whole compiler, just libgfortran.
> > 
> 
> This helps:
> 
> TZAV> cat ieee-except.f90 
> program z
>         implicit none
> 
>         real(kind=4) :: x,y
> 
>         x=1.0e-30
> 
>         y=1.0/x/x
>         write(*,*)y
> 
>         y=x*x
>         write(*,*)y
> 
> end program z
> 
> TZAV> gfortran45 -ffpe-trap=underflow,overflow,zero,denormal,invalid,precision ieee-except.f90
> 
> TZAV> ./a.out 
> Fortran runtime warning: IEEE 'denormal number' exception not supported.
> Floating exception (core dumped)
> TZAV> 
> 
> 
> The underflow triggered exception.

No, that was overflow..

By the way, are modules ieee_arithmetic,
ieee_features, ieee_exceptions not
supported yet?

(http://gcc.gnu.org/wiki/Fortran2003
	Unimplemented -  IEEE Exceptions)

Or is it just me with my ia64 FreeBSD?


Thank you

-- 
Anton Shterenlikht
Room 2.6, Queen's Building
Mech Eng Dept
Bristol University
University Walk, Bristol BS8 1TR, UK
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