From: Xavier Leroy <xavier.leroy@inria.fr>
To: Brian Hurt <brian.hurt@qlogic.com>
Cc: Ocaml Mailing List <caml-list@inria.fr>
Subject: Re: [Caml-list] Bug? Printf, %X and negative numbers
Date: Sun, 30 Mar 2003 11:51:11 +0200 [thread overview]
Message-ID: <20030330115111.A22539@pauillac.inria.fr> (raw)
In-Reply-To: <Pine.LNX.4.33.0303281513550.2225-100000@eagle.ancor.com>; from brian.hurt@qlogic.com on Fri, Mar 28, 2003 at 03:19:16PM -0600
> $ ocaml
> Objective Caml version 3.06
>
> # Printf.printf "%08X\n" (1 lsl 30);;
> C0000000
>
> I expected output of 40000000, not C0000000. Note that this isn't a case
> of simple sign extension, as the second example demonstrates. Where'd the
> extra bit come from?
As Yutaka Oiwa said, it comes from the conversion from Caml 31-bit
integers to C 32-bit integers, which performs sign extension.
Even though 0x40000000 and 0xC0000000 denote the same Caml int, I
agree this behavior is very surprising and should be fixed. I'll look
into this. Thanks for reporting the issue.
- Xavier Leroy
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next prev parent reply other threads:[~2003-03-30 9:51 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-28 21:19 Brian Hurt
2003-03-28 22:21 ` Yutaka OIWA
2003-03-30 9:51 ` Xavier Leroy [this message]
2003-03-31 15:44 ` Brian Hurt
2003-03-31 17:13 ` Ville-Pertti Keinonen
2003-04-01 8:19 ` Xavier Leroy
2003-04-01 16:09 ` David Brown
2003-04-01 16:45 ` Tim Freeman
2003-04-01 18:59 ` Brian Hurt
2003-04-01 19:16 ` Ville-Pertti Keinonen
2003-04-01 19:23 ` Tim Freeman
2003-04-01 21:00 ` Ville-Pertti Keinonen
2003-04-01 19:56 ` Brian Hurt
2003-04-01 20:45 ` Ville-Pertti Keinonen
2003-04-01 21:03 ` Brian Hurt
2003-04-02 8:55 ` Andreas Rossberg
2003-04-02 9:20 ` Ville-Pertti Keinonen
2003-04-01 18:34 ` Ville-Pertti Keinonen
2003-04-02 11:44 ` Claude Marche
2003-04-02 18:42 Gregory Morrisett
2003-04-02 21:12 ` Ville-Pertti Keinonen
2003-04-02 21:46 ` Lauri Alanko
2003-04-03 17:40 ` Ville-Pertti Keinonen
2003-04-04 16:14 ` Brian Hurt
2003-04-04 17:14 ` Ville-Pertti Keinonen
2003-04-04 17:27 ` Falk Hueffner
2003-04-03 0:52 ` brogoff
2003-04-03 9:29 Fabrice Le Fessant
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