From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <sourceware-bugzilla@sourceware.org>
Received: by sourceware.org (Postfix, from userid 48)
	id DD5143858C62; Thu, 30 Nov 2023 23:54:51 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org DD5143858C62
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org;
	s=default; t=1701388491;
	bh=6SPCq3UG+dY9HxKpF2w2SBO3erefEuLnMepVzeOENMw=;
	h=From:To:Subject:Date:From;
	b=KKbmYFq6lZAl2anPRHa9DpfzmTJ6Uq29eKCQUXIb7QEp2X4jh/CR6mhfqp17QHf04
	 M33s7OadCAFbf4we8s1aaL3eReucuDi0MSEx0eVTHGE2IUWFsRwmHaCciSRd7u/3Z7
	 pPGU1DBqC7Ynv8XzhRV4XJGKPMyYgwn44dcgydfU=
From: "mwelinder at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug math/31104] New: Sign inconsistencies with various log
 functions
Date: Thu, 30 Nov 2023 23:54:51 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: glibc
X-Bugzilla-Component: math
X-Bugzilla-Version: 2.35
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: mwelinder at gmail dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter target_milestone
Message-ID: <bug-31104-131@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <glibc-bugs.sourceware.org>

https://sourceware.org/bugzilla/show_bug.cgi?id=3D31104

            Bug ID: 31104
           Summary: Sign inconsistencies with various log functions
           Product: glibc
           Version: 2.35
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: math
          Assignee: unassigned at sourceware dot org
          Reporter: mwelinder at gmail dot com
  Target Milestone: ---

printf ("%+.12g %+.12g %+.12g %+.12g\n", log (-42), log2 (-42), log10 (-42),
log1p (-43));
  printf ("%+.12g %+.12g %+.12g %+.12g\n", logf (-42), log2f (-42), log10f
(-42), log1pf (-43));
  printf ("%+.12Lg %+.12Lg %+.12Lg %+.12Lg\n", logl (-42), log2l (-42), log=
10l
(-42), log1pl (-43));


gives me...

-nan -nan +nan -nan
-nan -nan +nan -nan
+nan +nan +nan -nan

That's just all over the place!

That sign inconsistency seems silly, even if the standards might allow it.



GNU C Library (Ubuntu GLIBC 2.35-0ubuntu3.4) stable release version 2.35.

--=20
You are receiving this mail because:
You are on the CC list for the bug.=