From: skaller <skaller@users.sourceforge.net>
To: Florian Weimer <fw@deneb.enyo.de>
Cc: Yaron Minsky <yminsky@cs.cornell.edu>,
Oliver Bandel <oliver@first.in-berlin.de>,
caml-list@inria.fr
Subject: Re: [Caml-list] int_of_string bug
Date: Fri, 30 Mar 2007 18:44:31 +1000 [thread overview]
Message-ID: <1175244271.22118.10.camel@rosella.wigram> (raw)
In-Reply-To: <878xdfmbm8.fsf@mid.deneb.enyo.de>
On Fri, 2007-03-30 at 09:30 +0200, Florian Weimer wrote:
> * Yaron Minsky:
>
> > That's a problem too, but there is at least a defensible reason for
> > that, which is that it is expensive to get integer overflow to throw
> > an exception.
>
> i386 and amd64 have hardware support for that, so it's not very
> expensive. There are pretty short RISC sequences for the checks, too.
>
> MLton uses the i386 hardware support, and I think you can disable the
> checks, so measuring the overhead shouldn't be too hard.
But there is a difference you may have missed: Ocaml integers
are 31 or 63 bits, not 32 or 64 bits.
--
John Skaller <skaller at users dot sf dot net>
Felix, successor to C++: http://felix.sf.net
next prev parent reply other threads:[~2007-03-30 8:44 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-29 16:27 Yaron Minsky
2007-03-29 21:29 ` [Caml-list] " Oliver Bandel
2007-03-30 0:26 ` Yaron Minsky
2007-03-30 7:30 ` Florian Weimer
2007-03-30 8:44 ` skaller [this message]
2007-03-30 8:59 ` Andreas Rossberg
2007-03-30 9:20 ` skaller
2007-03-30 1:21 ` Brian Hurt
2007-03-30 1:26 ` Yaron Minsky
2007-03-30 4:23 ` skaller
2007-03-30 5:59 ` Erik de Castro Lopo
2007-03-30 6:22 ` skaller
2007-03-30 13:38 ` Markus Mottl
2007-04-03 17:51 ` Toby Kelsey
2007-04-03 22:37 ` ls-ocaml-developer-2006
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