See
http://www.gnu.org/s/gsl/manual/html_node/Setting-up-your-IEEE-environment.html
I think you want mask-underflow; see "adjusted combination of modes"
example on that page. You're right, it should be the default, and it's
always been the default on systems I've used; I'm not sure why you have a
different IEEE mode by default.
Liam
On Fri, Nov 18, 2011 at 9:04 PM, Francesco Petrogalli <
francesco.petroga...@gmail.com> wrote:
> Hi,
> I am using the function gsl_sf_taylorcoeff in my code, which return
> the value {x^n\over n!} for real x>=0 and integer n>=0.
>
> For small values of x (\approx 10e-15) the default error handler of
> gsl is aborting my code with an underflow error.
> Probably a better algorithm in my code would not produce such problem,
> but I wonder why the underflow error is not "fixed" just returning 0.0
> as value of the function.
> Shouldn't this be a reasonable approach to underflow problems of this
> function? (If not, what am I missing?...)
>
> Best,
>
> franZ
>
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