From: Paul Eggert <eggert@cs.ucla.edu>
To: "Siraphob (Ben) Phipathananunth" <siraben@disroot.org>,
Eli Zaretskii <eliz@gnu.org>
Cc: emacs-devel@gnu.org
Subject: Re: Using the GNU GMP Library for Bignums in Emacs
Date: Sat, 21 Apr 2018 09:08:03 -0700 [thread overview]
Message-ID: <55c1e23c-1b9d-1a95-c683-5bf453967c51@cs.ucla.edu> (raw)
In-Reply-To: <51e619e0-ee38-eb97-6c1d-0925b675290a@disroot.org>
Siraphob (Ben) Phipathananunth wrote:
> Hopefully there isn't existing
> Emacs Lisp code that relies on unsafe arithmetic /anywhere/.
I'm afraid your hope will be in vain....
And it depends on what we mean by "unsafe". Is it safe to assume that (eq (1+ 0)
1) returns t, for example? The Scheme standard says "no" but we might decide
that 'eq' should "work" for fixnums in Emacs Lisp. That sort of thing.
> If the functions + - * / operate on bignums (instead of dedicated bignum
> functions), would that mean we drop 32/64 bit integers entirely?
No, it'd mean we'd still have fixnums vs bignums internally, and most programs
wouldn't care whether an integer is represented via fixnum or bignum, as it'd be
an issue merely of efficiency. Some programs would probably still care though
(for efficiency reasons), and GNU Calc quite possibly would be one such program.
> It would make much more sense to have separate math functions for 32/64
> bit numbers and for bignums. In doing so, it should be obvious to the
> Emacs Lisp programmer when to use what.
That's not how other Lisps work, by and large. They have just one integer type
and one set of functions. The goal is to simplify the job of writing a program.
next prev parent reply other threads:[~2018-04-21 16:08 UTC|newest]
Thread overview: 281+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-21 14:15 Using the GNU GMP Library for Bignums in Emacs Siraphob (Ben) Phipathananunth
2018-04-21 14:34 ` Eli Zaretskii
2018-04-21 15:01 ` Siraphob (Ben) Phipathananunth
2018-04-21 15:23 ` Paul Eggert
2018-04-21 15:36 ` Eli Zaretskii
2018-04-21 15:40 ` Siraphob (Ben) Phipathananunth
2018-04-21 15:54 ` Eli Zaretskii
2018-04-21 16:08 ` Paul Eggert [this message]
2018-04-26 3:17 ` Tom Tromey
2018-04-26 3:33 ` Stefan Monnier
2018-04-27 15:56 ` Richard Stallman
2018-04-27 16:08 ` Stefan Monnier
2018-04-21 22:42 ` Richard Stallman
2018-04-22 2:48 ` dancol
2018-04-22 13:00 ` Philipp Stephani
2018-04-22 17:43 ` Paul Eggert
2018-04-22 18:04 ` Daniel Colascione
2018-04-22 18:34 ` Clément Pit-Claudel
2018-04-23 3:39 ` Richard Stallman
2018-04-22 8:00 ` Siraphob (Ben) Phipathananunth
2018-04-22 9:06 ` Paul Eggert
2018-04-23 5:19 ` Helmut Eller
2018-04-23 8:39 ` Andreas Schwab
2018-04-23 14:36 ` Paul Eggert
2018-04-23 19:22 ` Helmut Eller
2018-04-23 20:26 ` Paul Eggert
2018-04-23 3:36 ` Richard Stallman
2018-04-22 12:43 ` Helmut Eller
2018-04-22 17:47 ` Paul Eggert
2018-04-23 3:39 ` Richard Stallman
2018-04-23 4:41 ` Paul Eggert
2018-04-24 2:54 ` Richard Stallman
2018-04-24 2:54 ` Richard Stallman
2018-04-24 4:35 ` Paul Eggert
2018-04-24 5:45 ` Helmut Eller
2018-06-03 23:44 ` Jefferson Carpenter
2018-04-25 1:05 ` Richard Stallman
2018-04-25 1:19 ` Paul Eggert
2018-04-25 22:40 ` Richard Stallman
2018-04-25 23:29 ` Paul Eggert
2018-04-30 3:07 ` Richard Stallman
2018-04-30 5:00 ` Michael Welsh Duggan
2018-04-30 12:34 ` Stefan Monnier
2018-05-01 3:01 ` Richard Stallman
2018-04-30 7:04 ` Paul Eggert
2018-05-01 3:01 ` Richard Stallman
2018-05-01 21:45 ` Paul Eggert
2018-05-03 3:34 ` Richard Stallman
2018-05-03 5:53 ` Paul Eggert
2018-05-03 6:26 ` Helmut Eller
2018-05-03 17:49 ` Eli Zaretskii
2018-05-03 18:26 ` Paul Eggert
2018-05-04 4:26 ` Richard Stallman
2018-05-05 5:03 ` Ken Raeburn
2018-05-06 3:12 ` Richard Stallman
2018-05-07 17:24 ` Ken Raeburn
2018-05-08 1:55 ` Richard Stallman
2018-05-07 18:40 ` Andreas Schwab
2018-05-03 18:51 ` Helmut Eller
[not found] ` <83sh78o6af.fsf@gnu.org>
2018-05-03 20:30 ` Helmut Eller
2018-05-03 21:48 ` Paul Eggert
2018-05-04 4:22 ` Richard Stallman
2018-04-23 3:03 ` Stefan Monnier
2018-07-05 21:29 ` Tom Tromey
2018-07-05 21:53 ` John Wiegley
2018-07-06 20:43 ` Tom Tromey
2018-07-06 21:00 ` Paul Eggert
2018-07-07 4:27 ` Tom Tromey
2018-07-07 4:53 ` Paul Eggert
2018-07-07 6:20 ` Tom Tromey
2018-07-07 6:38 ` Paul Eggert
2018-07-09 5:37 ` Tom Tromey
2018-07-09 16:22 ` Paul Eggert
2018-07-09 22:56 ` Tom Tromey
2018-07-09 23:02 ` Paul Eggert
2018-07-09 23:13 ` Tom Tromey
2018-07-10 4:01 ` Tom Tromey
2018-07-10 13:46 ` Tom Tromey
2018-07-08 15:59 ` Tom Tromey
2018-07-09 5:43 ` Tom Tromey
2018-07-10 4:10 ` Stefan Monnier
2018-07-07 23:43 ` Richard Stallman
2018-07-08 4:58 ` Paul Eggert
2018-07-08 22:55 ` Richard Stallman
2018-07-08 5:01 ` Tom Tromey
2018-07-08 22:55 ` Richard Stallman
2018-07-09 5:39 ` Tom Tromey
2018-07-09 20:15 ` Stefan Monnier
2018-07-09 23:25 ` Paul Eggert
2018-07-10 3:41 ` Stefan Monnier
2018-07-10 5:32 ` Helmut Eller
2018-07-10 13:54 ` Stefan Monnier
2018-07-10 16:01 ` Paul Eggert
2018-07-10 16:48 ` Helmut Eller
2018-07-10 17:45 ` Paul Eggert
2018-07-10 19:14 ` Helmut Eller
2018-07-11 1:31 ` Stefan Monnier
2018-07-11 5:59 ` Helmut Eller
2018-07-11 14:23 ` Stefan Monnier
2018-07-11 2:04 ` Tom Tromey
2018-07-11 2:36 ` Paul Eggert
2018-07-10 20:33 ` Stefan Monnier
2018-07-11 1:52 ` Tom Tromey
2018-07-11 2:35 ` Paul Eggert
2018-07-11 3:16 ` Stefan Monnier
2018-07-11 3:30 ` Paul Eggert
2018-07-11 3:42 ` Stefan Monnier
2018-07-11 22:48 ` Richard Stallman
2018-07-12 4:51 ` Tom Tromey
2018-07-12 23:35 ` Richard Stallman
2018-07-15 15:02 ` Stefan Monnier
2018-07-18 10:20 ` Paul Eggert
2018-07-18 13:17 ` Stefan Monnier
2018-07-27 21:14 ` Making 'eq' == 'eql' in bignum branch Paul Eggert
2018-07-28 14:26 ` Stefan Monnier
2018-07-29 3:34 ` Paul Eggert
2018-07-29 4:09 ` Stefan Monnier
2018-07-29 14:35 ` Eli Zaretskii
2018-07-30 17:07 ` Stefan Monnier
2018-07-30 18:49 ` Eli Zaretskii
2018-07-30 20:10 ` Stefan Monnier
2018-07-30 21:58 ` Paul Eggert
2018-07-31 2:38 ` Eli Zaretskii
2018-07-31 7:10 ` Paul Eggert
2018-07-31 16:12 ` Eli Zaretskii
2018-07-31 22:44 ` Paul Eggert
2018-08-01 5:51 ` Eli Zaretskii
2018-08-01 6:43 ` Paul Eggert
2018-08-01 8:53 ` Eli Zaretskii
2018-08-03 7:40 ` Paul Eggert
2018-08-03 7:55 ` Eli Zaretskii
2018-08-10 11:12 ` Pip Cet
2018-08-10 15:15 ` Stefan Monnier
2018-08-10 15:43 ` Pip Cet
2018-08-10 15:55 ` Stefan Monnier
2018-08-10 16:52 ` John Yates
2018-08-10 19:45 ` Eli Zaretskii
2018-08-10 20:48 ` Paul Eggert
2018-08-10 7:05 ` Elias Mårtenson
2018-08-10 8:02 ` Paul Eggert
[not found] ` <<83d0v4p1si.fsf@gnu.org>
2018-07-31 15:08 ` Drew Adams
2018-07-31 16:24 ` Eli Zaretskii
2018-07-31 22:21 ` Paul Eggert
2018-08-20 0:04 ` Stefan Monnier
2018-08-20 1:33 ` Paul Eggert
2018-08-20 15:20 ` Stefan Monnier
2018-08-20 6:35 ` Pip Cet
2018-08-20 7:05 ` Paul Eggert
2018-08-20 7:19 ` Pip Cet
2018-08-20 7:27 ` Paul Eggert
2018-08-20 8:49 ` Andy Moreton
2018-08-20 16:03 ` Paul Eggert
2018-08-20 16:41 ` Andy Moreton
2018-08-20 16:51 ` Paul Eggert
2018-08-20 16:58 ` Andy Moreton
2018-08-20 19:50 ` Pip Cet
2018-08-20 21:54 ` Andy Moreton
2018-08-21 3:38 ` Richard Stallman
2018-08-20 17:23 ` Eli Zaretskii
2018-08-20 17:35 ` Paul Eggert
2018-08-20 15:13 ` Eli Zaretskii
2018-08-20 15:26 ` Stefan Monnier
2018-08-20 16:19 ` Eli Zaretskii
2018-08-21 15:01 ` Robert Pluim
2018-08-21 19:09 ` Robert Pluim
2018-08-21 19:35 ` Paul Eggert
2018-08-22 8:26 ` Lars Ingebrigtsen
2018-08-22 13:22 ` Herring, Davis
2018-08-22 13:28 ` Lars Ingebrigtsen
2018-08-22 13:55 ` Paul Eggert
2018-08-22 20:01 ` Stefan Monnier
2018-08-23 8:13 ` Robert Pluim
2018-08-23 13:45 ` Eli Zaretskii
2018-08-23 14:48 ` Robert Pluim
2018-08-23 18:43 ` Stefan Monnier
2018-08-24 9:51 ` Robert Pluim
2018-08-25 17:59 ` Stefan Monnier
2018-08-20 16:01 ` Paul Eggert
2018-08-20 16:26 ` Eli Zaretskii
2018-08-21 3:37 ` Richard Stallman
2018-08-20 15:12 ` Eli Zaretskii
2018-08-20 15:26 ` Lars Ingebrigtsen
2018-08-20 16:18 ` Eli Zaretskii
2018-08-22 19:59 ` Stefan Monnier
2018-08-21 3:38 ` Richard Stallman
2018-08-25 23:27 ` Paul Eggert
2018-08-26 12:45 ` Tramp and fixnum (was: Making 'eq' == 'eql' in bignum branch) Michael Albinus
2018-08-26 15:34 ` Paul Eggert
2018-08-26 16:06 ` Eli Zaretskii
2018-08-26 16:44 ` Tramp and fixnum Michael Albinus
2018-08-28 4:47 ` Tramp and fixnum (was: Making 'eq' == 'eql' in bignum branch) Paul Eggert
2018-08-26 16:49 ` Tramp and fixnum Michael Albinus
2018-08-28 4:48 ` Paul Eggert
2018-08-28 11:50 ` Michael Albinus
2018-08-28 14:33 ` Michael Albinus
2018-08-28 15:18 ` Paul Eggert
2018-08-29 8:09 ` Michael Albinus
2018-08-26 16:34 ` Making 'eq' == 'eql' in bignum branch Tom Tromey
2018-08-26 16:59 ` Stefan Monnier
2018-08-26 20:19 ` Alan Mackenzie
2018-08-26 20:31 ` Stefan Monnier
2018-08-27 2:31 ` Eli Zaretskii
2018-08-27 4:45 ` Stefan Monnier
2018-08-27 5:10 ` Paul Eggert
2018-08-27 14:59 ` Eli Zaretskii
2018-08-27 15:18 ` Stefan Monnier
2018-08-27 15:37 ` Eli Zaretskii
2018-08-27 15:47 ` Stefan Monnier
2018-08-27 18:57 ` Paul Eggert
2018-08-26 20:45 ` Richard Stallman
2018-08-26 22:10 ` Clément Pit-Claudel
2018-08-27 0:23 ` Paul Eggert
2018-08-27 22:50 ` Richard Stallman
2018-08-28 1:44 ` Paul Eggert
2018-08-28 14:12 ` Tom Tromey
2018-08-28 21:30 ` Richard Stallman
2018-08-28 22:03 ` Clément Pit-Claudel
2018-08-29 22:10 ` Richard Stallman
2018-08-28 18:03 ` Clément Pit-Claudel
2018-08-29 3:53 ` Stefan Monnier
2018-08-29 18:49 ` Clément Pit-Claudel
2018-08-28 1:33 ` Lars Ingebrigtsen
2018-08-28 2:25 ` Pip Cet
2018-08-28 3:45 ` Paul Eggert
2018-08-28 7:34 ` Ken Raeburn
2018-08-28 9:11 ` Helmut Eller
2018-08-28 12:15 ` Stefan Monnier
2018-08-28 18:00 ` Clément Pit-Claudel
2018-08-28 22:57 ` Pip Cet
2018-08-29 3:42 ` Herring, Davis
2018-08-29 5:40 ` Helmut Eller
2018-08-29 13:15 ` Pip Cet
2018-08-31 19:59 ` Alan Mackenzie
2018-08-31 20:30 ` Clément Pit-Claudel
2018-08-31 21:58 ` Alan Mackenzie
2018-09-01 1:26 ` Herring, Davis
2018-08-31 21:15 ` Stefan Monnier
2018-09-01 1:05 ` Herring, Davis
2018-09-02 10:57 ` Alan Mackenzie
2018-09-04 6:14 ` Herring, Davis
2018-09-01 4:47 ` Clément Pit-Claudel
2018-08-29 3:22 ` Elias Mårtenson
2018-08-29 18:56 ` Clément Pit-Claudel
2018-08-29 19:30 ` Stefan Monnier
2018-08-31 0:09 ` Stefan Monnier
2018-09-01 2:32 ` Richard Stallman
2018-08-31 16:41 ` Paul Eggert
2018-08-28 21:25 ` Richard Stallman
2018-08-30 19:13 ` Johan Bockgård
2018-08-30 21:14 ` Clément Pit-Claudel
2018-08-30 21:35 ` Tom Tromey
2018-08-30 21:56 ` Clément Pit-Claudel
2018-08-20 15:37 ` Stefan Monnier
2018-08-20 16:23 ` Eli Zaretskii
2018-08-20 16:12 ` Paul Eggert
2018-08-20 17:21 ` Helmut Eller
2018-08-20 14:02 ` Stefan Monnier
2018-07-18 15:55 ` Using the GNU GMP Library for Bignums in Emacs Eli Zaretskii
2018-07-18 21:42 ` Paul Eggert
2018-07-22 12:06 ` Ken Raeburn
2018-07-22 16:44 ` Paul Eggert
2018-08-01 7:57 ` Paul Eggert
2018-08-01 11:59 ` Eli Zaretskii
2018-08-02 2:06 ` Paul Eggert
2018-08-02 13:49 ` Eli Zaretskii
2018-07-22 19:57 ` Achim Gratz
2018-04-21 16:46 ` Markus Triska
2018-04-21 17:09 ` Eli Zaretskii
2018-04-21 17:27 ` Markus Triska
2018-04-21 18:37 ` Paul Eggert
2018-04-21 22:42 ` Richard Stallman
2018-04-22 2:43 ` Eli Zaretskii
2018-04-23 3:34 ` Richard Stallman
2018-04-23 4:21 ` Paul Eggert
2018-04-23 13:13 ` Stefan Monnier
2018-04-24 2:54 ` Richard Stallman
2018-04-24 4:34 ` Paul Eggert
2018-04-25 1:05 ` Richard Stallman
2018-04-23 15:18 ` Eli Zaretskii
2018-04-24 18:56 ` Emanuele Santoro
2018-04-26 15:52 ` Glenn Morris
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