From: "Scott J," <jscott@planetinternet.be>
To: "Xavier Leroy" <xavier.leroy@inria.fr>
Cc: <caml-list@inria.fr>
Subject: Re: [Caml-list] Runtime overflow and what to do
Date: Fri, 11 Oct 2002 00:17:15 +0200 [thread overview]
Message-ID: <021501c270aa$ca400660$0100a8c0@janxp> (raw)
In-Reply-To: <20021010205716.A8990@pauillac.inria.fr>
[-- Attachment #1: Type: text/plain, Size: 1051 bytes --]
Hi,
So it is not easy, perhaps even impossible if the processor doesn't set a
flag .
e.g. fact n begins first with a lis of negative numbers (after overflow)
then comes again a list with positive numbers and then it remains = 0
Scott
----- Original Message -----
From: Xavier Leroy
To: Sven LUTHER
Cc: Luc Maranget ; Scott J, ; caml-list@inria.fr
Sent: Thursday, October 10, 2002 8:57 PM
Subject: Re: [Caml-list] Runtime overflow and what to do
> But it is the lower bit that is ignored, no, si i guess incrementing an
> ocaml integer by 1, correspond to incrementing the machine integer by
> two, and would set the overflow flag in the processor status register
> all the same, would it not ?
Yes, except that not all processors have overflow flags. The Alpha
and the MIPS don't, for instance. Integer arithmetic modulo a power
of 2 is unpleasant for certain applications (and very useful for
others, e.g. hash functions and cryptography), but this is really all
what today's processors offer.
- Xavier Leroy
[-- Attachment #2: Type: text/html, Size: 2583 bytes --]
next prev parent reply other threads:[~2002-10-10 22:17 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-10-10 15:01 Scott J,
2002-10-10 15:07 ` Maxence Guesdon
2002-10-10 15:11 ` Maxence Guesdon
2002-10-10 15:21 ` Luc Maranget
2002-10-10 18:13 ` Sven LUTHER
2002-10-10 18:57 ` Xavier Leroy
2002-10-10 22:17 ` Scott J, [this message]
2002-10-11 8:00 ` Sven LUTHER
2002-10-11 10:16 ` Alessandro Baretta
2002-10-12 16:13 ` John Carr
2002-10-12 16:58 ` Sven LUTHER
2002-10-12 17:12 ` John Prevost
2002-10-13 9:31 ` Xavier Leroy
2002-10-13 9:52 ` Sven LUTHER
2002-10-13 9:57 ` Xavier Leroy
2002-10-13 10:15 ` Sven LUTHER
2002-10-13 13:25 ` John Carr
2002-10-13 9:28 ` Xavier Leroy
2002-10-14 0:56 ` Chris Hecker
2002-10-14 9:46 ` Jacques Garrigue
2002-10-14 11:02 ` Scott J,
2002-10-14 14:05 ` Tim Freeman
2002-10-14 15:32 ` Stefano Zacchiroli
2002-10-14 16:12 ` Alain Frisch
2002-10-14 16:49 ` [Caml-list] new ocaml switches (was Re: Runtime overflow and what to do) Chris Hecker
2002-10-13 9:25 ` [Caml-list] Runtime overflow and what to do Xavier Leroy
2002-10-13 10:04 ` Daniel de Rauglaudre
2002-10-13 10:29 ` Pierre Weis
2002-10-13 10:47 ` Daniel de Rauglaudre
2002-10-13 12:38 ` Pierre Weis
2002-10-13 16:14 ` Xavier Leroy
2002-10-13 17:06 ` Michel Quercia
2002-10-15 19:15 ` Pierre Weis
2002-10-15 19:25 ` Xavier Leroy
2002-10-16 8:24 ` Pierre Weis
2002-10-13 10:19 ` Pierre Weis
2002-10-11 8:02 ` Sven LUTHER
2002-10-11 6:42 ` Florian Hars
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='021501c270aa$ca400660$0100a8c0@janxp' \
--to=jscott@planetinternet.be \
--cc=caml-list@inria.fr \
--cc=xavier.leroy@inria.fr \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).