From: Andreas Rossberg <rossberg@ps.uni-sb.de>
To: skaller <skaller@users.sourceforge.net>
Cc: Florian Weimer <fw@deneb.enyo.de>,
Oliver Bandel <oliver@first.in-berlin.de>,
Yaron Minsky <yminsky@cs.cornell.edu>,
caml-list@inria.fr
Subject: Re: [Caml-list] int_of_string bug
Date: Fri, 30 Mar 2007 10:59:44 +0200 [thread overview]
Message-ID: <460CD180.6080404@ps.uni-sb.de> (raw)
In-Reply-To: <1175244271.22118.10.camel@rosella.wigram>
skaller wrote:
>>
>>> 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.
But it uses the most significant 31/63 bits for ints, so that becomes a
non-issue. ;-)
--
Andreas Rossberg, rossberg@ps.uni-sb.de
next prev parent reply other threads:[~2007-03-30 9:01 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
2007-03-30 8:59 ` Andreas Rossberg [this message]
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
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=460CD180.6080404@ps.uni-sb.de \
--to=rossberg@ps.uni-sb.de \
--cc=caml-list@inria.fr \
--cc=fw@deneb.enyo.de \
--cc=oliver@first.in-berlin.de \
--cc=skaller@users.sourceforge.net \
--cc=yminsky@cs.cornell.edu \
/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