Behavior of mpf_eq near zero

Marc Glisse marc.glisse at
Mon Apr 13 11:12:07 UTC 2015

On Mon, 13 Apr 2015, Vincent Lefevre wrote:

> On 2015-04-13 11:58:15 +0200, Marc Glisse wrote:
>> Doesn't the manual already say that the whole mpf is obsolete?
> No, it just seems to discourage its use *a little*:
> |    Note that the `mpf' functions are _not_ intended as a smooth
> | extension to IEEE P754 arithmetic.  In particular results obtained on
> | one computer often differ from the results on a computer with a
> | different word size.
> |
> |    The GMP extension library MPFR (`') is an alternative
> | to GMP's `mpf' functions.  MPFR provides well-defined precision and
> | accurate rounding, and thereby naturally extends IEEE P754.
"New projects should strongly consider using the much more complete GMP 
extension library mpfr instead of mpf."

Marc Glisse

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