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Strange 32bit-ism
From: |
David Kastrup |
Subject: |
Strange 32bit-ism |
Date: |
Mon, 28 Aug 2006 11:41:44 +0200 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) |
Please describe exactly what actions triggered the bug
and the precise symptoms of the bug:
Type
M-: most-negative-fixnum RET
and you get the output
-268435456 (#o36000000000, #xf0000000)
The unsigned numbers to the right don't make sense: they are 29-bit
numbers sign-extended to 32 bit. The additional 3 bits have no roots
in Emacs integers but just are a shine-through from the underlying C
integers. So this should be either
-268435456 (#o2000000000, #x10000000)
which has the disadvantage that it loosely implies leading zeros
because 29 is neither dividable by 3 or 4, or
-268435456 (#o-2000000000, #x-10000000)
In GNU Emacs 22.0.50.8 (i686-pc-linux-gnu, GTK+ Version 2.8.20)
of 2006-08-28 on lola
X server distributor `The X.Org Foundation', version 11.0.70000000
configured using `configure '--prefix=/usr/local/emacs-21' '--with-gtk'
'--without-toolkit-scroll-bars''
Important settings:
value of $LC_ALL: nil
value of $LC_COLLATE: nil
value of $LC_CTYPE: nil
value of $LC_MESSAGES: nil
value of $LC_MONETARY: nil
value of $LC_NUMERIC: nil
value of $LC_TIME: nil
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8
default-enable-multibyte-characters: t
Major mode: Help
Minor modes in effect:
TeX-PDF-mode: t
desktop-save-mode: t
iswitchb-mode: t
minibuffer-electric-default-mode: t
tooltip-mode: t
mouse-wheel-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
unify-8859-on-decoding-mode: t
unify-8859-on-encoding-mode: t
utf-translate-cjk-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: identity
view-mode: t
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum
- Strange 32bit-ism,
David Kastrup <=