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Re: [PATCH, gfortran testsuite]: Do not load denormals in gfortran.fortran_torture/intrinsic_nearest.f90
On Sat, Aug 22, 2009 at 07:20:48AM -0700, Tim Prince wrote:
> N.M. Maclaren wrote:
> >On Aug 21 2009, Uros Bizjak wrote:
> >>On 08/21/2009 07:09 PM, Tobias Burnus wrote:
> >>
> >>>>It is not nice to upset FP hardware of various target architectures by
> >>>>generating denormalized single-precision FP numbers [1] in the
> >>>>testsuite. ...
> It does look dangerous to generate specific bit patterns which are
> likely to break with options such as -ffast-math.
> >>
> >
> >Most HPC systems use hard underflow, because it is faster.
> This is likely to change a year a so from now, no doubt influenced by
> gfortran not having adequate provision to control underflow setting, and
> gcc programmers not caring to deal with it.
Tim,
You know where to find the source code for GCC. I suspect
that more than one person will be indebted to you when you
submit your patch that addresses this issue.
--
Steve