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From: Po Lu <luangruo@yahoo.com>
To: "Gerd Möllmann" <gerd.moellmann@gmail.com>
Cc: emacs-devel@gnu.org
Subject: Re: [PATCH] Re: Bignum performance
Date: Wed, 16 Aug 2023 14:42:33 +0800	[thread overview]
Message-ID: <87zg2rjxnq.fsf@yahoo.com> (raw)
In-Reply-To: <2dec78a7-76e0-8789-4d20-7f0f6effe28a@gmail.com> ("Gerd Möllmann"'s message of "Wed, 16 Aug 2023 07:18:54 +0200")

Gerd Möllmann <gerd.moellmann@gmail.com> writes:

>> I don't know about SBCL, but as for Emacs, refer to the definition of
>> VALBITS in lisp.h (maybe also the right files among m/*.h and s/*.h, but
>> I have no idea where they've disappeared to.)
>
> The SBCL I have here, a Homebrew installation, uses the scheme where
>
> ....0	-> fixnum
> ....1   -> other objects (discriminated by additional tag bits)
>
> I had the same for Emacs in the branch gerd_int in the 2000s, if
> memory serves me.

In today's Emacs, 0 is Lisp_Symbol; this facilitates representing Qnil
as C NULL.



  parent reply	other threads:[~2023-08-16  6:42 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-14  6:28 [PATCH] Re: Bignum performance (was: Shrinking the C core) Gerd Möllmann
2023-08-14  6:56 ` Gerd Möllmann
2023-08-14  7:04   ` Ihor Radchenko
2023-08-14  7:35     ` Gerd Möllmann
2023-08-14  8:09       ` Ihor Radchenko
2023-08-14  9:28         ` Gerd Möllmann
2023-08-14  9:42           ` Ihor Radchenko
2023-08-15 14:03             ` Emanuel Berg
2023-08-15 15:01               ` Ihor Radchenko
2023-08-15 22:21                 ` Emanuel Berg
2023-08-15 22:33                 ` Emanuel Berg
2023-08-16  4:36                   ` tomas
2023-08-16  5:23                     ` Emanuel Berg
2023-08-14 16:51           ` Emanuel Berg
2023-08-15  4:58             ` Gerd Möllmann
2023-08-15 14:20               ` Emanuel Berg
2023-08-15  6:26             ` [PATCH] Re: Bignum performance Po Lu
2023-08-15 14:33               ` Emanuel Berg
2023-08-15 17:07                 ` tomas
2023-08-15 22:46                   ` Emanuel Berg
2023-08-16  1:31                 ` Po Lu
2023-08-16  1:37                   ` Emanuel Berg
2023-08-16  3:17                     ` Po Lu
2023-08-16  4:44                       ` tomas
2023-08-16  5:18                       ` Gerd Möllmann
2023-08-16  5:35                         ` Emanuel Berg
2023-08-18  7:14                           ` Simon Leinen
2023-08-19 13:10                             ` Emanuel Berg
2023-08-20  5:07                               ` Ihor Radchenko
2023-08-20  6:20                                 ` Emanuel Berg
2023-08-28  5:32                                 ` Emanuel Berg
2023-09-03  0:48                                   ` Emanuel Berg
2023-09-03  8:50                                     ` Ihor Radchenko
2023-09-03  9:05                                       ` Emanuel Berg
2023-09-03 10:30                                         ` Elisp native-comp vs. SBCL for inclist-type-hints benchmark (was: [PATCH] Re: Bignum performance) Ihor Radchenko
2023-09-04  1:03                                           ` Emanuel Berg
2023-09-03  1:57                                   ` [PATCH] Re: Bignum performance Emanuel Berg
2023-09-04  4:13                             ` Emanuel Berg
2023-08-16  5:41                         ` Gerd Möllmann
2023-08-16  6:42                         ` Po Lu [this message]
2023-08-16  8:05                           ` Gerd Möllmann
  -- strict thread matches above, loose matches on Subject: below --
2023-08-09  9:46 Shrinking the C core Eric S. Raymond
2023-08-09 12:34 ` Po Lu
2023-08-09 15:51   ` Eric S. Raymond
2023-08-09 23:56     ` Po Lu
2023-08-10  1:19       ` Eric S. Raymond
2023-08-10  7:44         ` Eli Zaretskii
2023-08-10 21:54           ` Emanuel Berg
2023-08-11 10:27             ` Bignum performance (was: Shrinking the C core) Ihor Radchenko
2023-08-11 12:10               ` Emanuel Berg
2023-08-11 12:32                 ` Ihor Radchenko
2023-08-11 12:38                   ` Emanuel Berg
2023-08-11 14:07                     ` [PATCH] " Ihor Radchenko
2023-08-11 18:06                       ` Emanuel Berg
2023-08-11 19:41                         ` Ihor Radchenko
2023-08-11 19:50                           ` Emanuel Berg
2023-08-12  8:24                             ` Ihor Radchenko
2023-08-12 16:03                               ` Emanuel Berg
2023-08-13  9:09                                 ` Ihor Radchenko
2023-08-13  9:49                                   ` Emanuel Berg
2023-08-13 10:21                                     ` Ihor Radchenko
2023-08-14  2:20                                       ` Emanuel Berg
2023-08-14  2:42                                         ` [PATCH] Re: Bignum performance Po Lu
2023-08-14  4:16                                           ` Emanuel Berg
2023-08-14  7:15                                           ` Ihor Radchenko
2023-08-14  7:50                                             ` Po Lu
2023-08-14  9:28                                               ` Ihor Radchenko
2023-08-15 14:28                                             ` Emanuel Berg

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