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Re: Using the GNU GMP Library for Bignums in Emacs
From: |
Richard Stallman |
Subject: |
Re: Using the GNU GMP Library for Bignums in Emacs |
Date: |
Sun, 29 Apr 2018 23:07:04 -0400 |
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> > If we were to support_only_ 64-bit systems, this argument would cease
> > to be valid.
> That is easy to arrange; just configure --with-wide-int. This causes
> Emacs to use 64-bit words on all platforms
That may be correct, but it doesn't respond to the point at hand.
The point at hand is that Emacs does support 32-bit Lisp objecs in
some cases. and that a 32-bit number _in 32-bit builds_ will not
be a fixnum.
If you're suggesting that I personally change to a 64-bit build, that
doesn't respond to the issue at hand. It's not about what happens for
me in particular.
If you're suggesting to eliminate support for 32-bit builds,
I agree that that would eliminate the issue. But I think that change
would have substantial disadvantages.
> However, I don't see why assuming 64 bits would mean that the argument
> would cease to be valid. Even with that assumption, we would continue
> have the same problem with numbers like #xffffffffffffffff that exceed
> Emacs fixnum range when words are 64 bits.
I expect that %x is used only for values meant to interact
with the operating system in certain ways, and that _most of_ those
values will never be more than 32 bits.
I could be mistaken in this, but it is a factual question.
Where else do people use %x?
--
Dr Richard Stallman
President, Free Software Foundation (https://gnu.org, https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)
Skype: No way! See https://stallman.org/skype.html.
- Re: Using the GNU GMP Library for Bignums in Emacs, (continued)
- Re: Using the GNU GMP Library for Bignums in Emacs, Paul Eggert, 2018/04/22
- Re: Using the GNU GMP Library for Bignums in Emacs, Richard Stallman, 2018/04/22
- Re: Using the GNU GMP Library for Bignums in Emacs, Paul Eggert, 2018/04/23
- Re: Using the GNU GMP Library for Bignums in Emacs, Richard Stallman, 2018/04/23
- Re: Using the GNU GMP Library for Bignums in Emacs, Paul Eggert, 2018/04/24
- Re: Using the GNU GMP Library for Bignums in Emacs, Helmut Eller, 2018/04/24
- Re: Using the GNU GMP Library for Bignums in Emacs, Richard Stallman, 2018/04/24
- Re: Using the GNU GMP Library for Bignums in Emacs, Paul Eggert, 2018/04/24
- Re: Using the GNU GMP Library for Bignums in Emacs, Richard Stallman, 2018/04/25
- Re: Using the GNU GMP Library for Bignums in Emacs, Paul Eggert, 2018/04/25
- Re: Using the GNU GMP Library for Bignums in Emacs,
Richard Stallman <=
- Re: Using the GNU GMP Library for Bignums in Emacs, Michael Welsh Duggan, 2018/04/30
- Re: Using the GNU GMP Library for Bignums in Emacs, Stefan Monnier, 2018/04/30
- Re: Using the GNU GMP Library for Bignums in Emacs, Richard Stallman, 2018/04/30
- Re: Using the GNU GMP Library for Bignums in Emacs, Paul Eggert, 2018/04/30
- Re: Using the GNU GMP Library for Bignums in Emacs, Richard Stallman, 2018/04/30
- Re: Using the GNU GMP Library for Bignums in Emacs, Richard Stallman, 2018/04/23
- Re: Using the GNU GMP Library for Bignums in Emacs, Stefan Monnier, 2018/04/22
Re: Using the GNU GMP Library for Bignums in Emacs, Markus Triska, 2018/04/21