From: "Marc Nieper-Wißkirchen" <marc.nieper+gnu@gmail.com>
To: Bruno Haible <bruno@clisp.org>
Cc: "Marc Nieper-Wißkirchen" <marc.nieper+gnu@gmail.com>, bug-gnulib@gnu.org
Subject: Re: Easy Accurate Reading and Writing of Floating-Point Numbers
Date: Wed, 20 May 2020 12:04:00 +0200 [thread overview]
Message-ID: <CAEYrNrTjqgEmp=3PJerRkFJAzUTQUT=nLh7un1bhEh8HB=Rq+A@mail.gmail.com> (raw)
In-Reply-To: <9817931.4WPAKDlFbJ@omega>
Am Mi., 20. Mai 2020 um 00:37 Uhr schrieb Bruno Haible <bruno@clisp.org>:
> Marc Nieper-Wißkirchen wrote:
> > for output, the shortest rounded
> > representation that still reads back accurately has to be selected.
> > ...
> > A simple algorithm is given by Aubrey Jaffer in [1].
> >
> > [1] http://people.csail.mit.edu/jaffer/III/EZFPRW
This was just one, which I liked because of its simplicity. (And
because it is written in my favorite programming language.)
[...]
> There are several other algorithms for this purpose.
There is also the new Ryu algorithm by Ulf Adams, see [2].
Interestingly, he has found some problems in Jaffer's algorithm, see
the paper [3].
[...]
> Then there's also the algorithm, by Michael Stoll and me (1990),
> in GNU clisp and CLN (based on multiprecision arithmetic, not hardware floats).
I didn't know this; I will check this out.
The initial version of "c_dtoastr" will, however just work as "dtoastr" does.
Marc
--
[2] https://github.com/ulfjack/ryu
[3] https://dl.acm.org/doi/10.1145/3296979.3192369
prev parent reply other threads:[~2020-05-20 10:04 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-19 7:44 Easy Accurate Reading and Writing of Floating-Point Numbers Marc Nieper-Wißkirchen
2020-05-19 15:10 ` Marc Nieper-Wißkirchen
2020-05-19 15:35 ` Marc Nieper-Wißkirchen
2020-05-19 15:51 ` Paul Eggert
2020-05-19 16:11 ` Marc Nieper-Wißkirchen
2020-05-19 17:23 ` Tim Rühsen
2020-05-19 19:10 ` Marc Nieper-Wißkirchen
2020-05-19 21:25 ` Tim Rühsen
2020-05-19 22:15 ` copyright in Germany Bruno Haible
2020-05-20 9:52 ` Marc Nieper-Wißkirchen
2020-05-20 13:41 ` Bruno Haible
2020-05-20 12:39 ` Easy Accurate Reading and Writing of Floating-Point Numbers Marc Nieper-Wißkirchen
2020-05-23 12:02 ` Bruno Haible
2020-05-23 12:26 ` Marc Nieper-Wißkirchen
2020-05-23 14:52 ` Bruno Haible
2020-05-23 15:50 ` Marc Nieper-Wißkirchen
2020-05-23 15:33 ` Paul Eggert
2020-06-25 19:19 ` Bruno Haible
2020-06-25 19:33 ` Marc Nieper-Wißkirchen
2020-05-19 22:37 ` Bruno Haible
2020-05-20 10:04 ` Marc Nieper-Wißkirchen [this message]
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