From: "Neil Jerram" <neiljerram@googlemail.com>
To: "Rob Browning" <rlb@defaultvalue.org>
Cc: guile-devel <guile-devel@gnu.org>
Subject: Re: Just in case...
Date: Tue, 12 Aug 2008 21:36:33 +0100 [thread overview]
Message-ID: <49dd78620808121336l6604a5e1m9d0e531c24b5580b@mail.gmail.com> (raw)
In-Reply-To: <49dd78620808120737t68d167e4ob2768e88804da22c@mail.gmail.com>
2008/8/12 Neil Jerram <neiljerram@googlemail.com>:
>
> I'll try to take a look at the m68k prob tonight.
No solution yet I'm afraid, so any thoughts would be appreciated.
It seems to be a fairly obscure rounding test that is failing:
x = ldexp (1.0, DBL_MANT_DIG - 1) - 1.0 + 0.5;
want = ldexp (1.0, DBL_MANT_DIG - 1);
assert (scm_c_round (x) == want);
i.e., IIUC, testing rounding near the upper limit of what can be
represented as a floating point number.
Looking at this from the "what changed" point of view: I don't believe
that either the code (scm_c_round() in libguile/numbers.c) or the test
(test-suite/standalone/test-round.c) has changed significantly since
2004. As far as Debian is concerned, therefore, I would have expected
to see exactly the same m68k build failure for 1.8.1+1-4 (the current
stable version) and 1.8.4+1.2 (current testing). But I haven't been
able to find any build logs to confirm or deny that.
Regards,
Neil
next prev parent reply other threads:[~2008-08-12 20:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <87wsjgnvp3.fsf@gnu.org>
2008-07-25 10:05 ` Summer holidays Neil Jerram
[not found] ` <49dd78620807280231g3ab15246l2cb9fd49025dcfa7@mail.gmail.com>
[not found] ` <49dd78620807290108p63704f96v7f0efc139be66112@mail.gmail.com>
[not found] ` <87sktsi4tf.fsf@raven.defaultvalue.org>
[not found] ` <877ib1mfdu.fsf@raven.defaultvalue.org>
[not found] ` <49dd78620808040339xacc8e1dm344af6a93350fbc8@mail.gmail.com>
[not found] ` <877iaowf9h.fsf@raven.defaultvalue.org>
[not found] ` <87sktcqq4n.fsf@raven.defaultvalue.org>
[not found] ` <49dd78620808110158i2fd25f10u257aa0cbc0d74ae5@mail.gmail.com>
[not found] ` <49dd78620808120737t68d167e4ob2768e88804da22c@mail.gmail.com>
2008-08-12 20:36 ` Neil Jerram [this message]
[not found] ` <87hc9pizmy.fsf@raven.defaultvalue.org>
2008-08-13 7:36 ` Just in case Neil Jerram
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
List information: https://www.gnu.org/software/guile/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=49dd78620808121336l6604a5e1m9d0e531c24b5580b@mail.gmail.com \
--to=neiljerram@googlemail.com \
--cc=guile-devel@gnu.org \
--cc=rlb@defaultvalue.org \
/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 read-only IMAP folder(s) and NNTP newsgroup(s).