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* [Bug libstdc++/65883] New: numeric_limits<unsigned __int128>::max() returns incorrect value
@ 2015-04-25 10:25 john at johnmaddock dot co.uk
2015-04-25 10:38 ` [Bug libstdc++/65883] [5/6 Regression] " glisse at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: john at johnmaddock dot co.uk @ 2015-04-25 10:25 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65883
Bug ID: 65883
Summary: numeric_limits<unsigned __int128>::max() returns
incorrect value
Product: gcc
Version: 5.1.0
Status: UNCONFIRMED
Severity: blocker
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: john at johnmaddock dot co.uk
std::numeric_limits<unsigned __int128>::max() returns
0x7fffffffffffffffffffffffffffffff which is definitely not 2^128-1. Looks like
a cut and paste error from numeric_limits<__int128>?
This is on Xubuntu 64-bit.
This is a showstopper for Boost.Multiprecision which has asserts that are
incorrectly triggered by the bug.
Regards, John Maddock.
^ permalink raw reply [flat|nested] 6+ messages in thread* [Bug libstdc++/65883] [5/6 Regression] numeric_limits<unsigned __int128>::max() returns incorrect value 2015-04-25 10:25 [Bug libstdc++/65883] New: numeric_limits<unsigned __int128>::max() returns incorrect value john at johnmaddock dot co.uk @ 2015-04-25 10:38 ` glisse at gcc dot gnu.org 2015-04-28 19:36 ` glisse at gcc dot gnu.org ` (3 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: glisse at gcc dot gnu.org @ 2015-04-25 10:38 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65883 Marc Glisse <glisse at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2015-04-25 Summary|numeric_limits<unsigned |[5/6 Regression] |__int128>::max() returns |numeric_limits<unsigned |incorrect value |__int128>::max() returns | |incorrect value Ever confirmed|0 |1 --- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> --- Indeed, the specialization for struct numeric_limits<unsigned TYPE> uses TYPE instead of unsigned TYPE for max :-( ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libstdc++/65883] [5/6 Regression] numeric_limits<unsigned __int128>::max() returns incorrect value 2015-04-25 10:25 [Bug libstdc++/65883] New: numeric_limits<unsigned __int128>::max() returns incorrect value john at johnmaddock dot co.uk 2015-04-25 10:38 ` [Bug libstdc++/65883] [5/6 Regression] " glisse at gcc dot gnu.org @ 2015-04-28 19:36 ` glisse at gcc dot gnu.org 2015-04-28 19:46 ` [Bug libstdc++/65883] [5 " glisse at gcc dot gnu.org ` (2 subsequent siblings) 4 siblings, 0 replies; 6+ messages in thread From: glisse at gcc dot gnu.org @ 2015-04-28 19:36 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65883 --- Comment #2 from Marc Glisse <glisse at gcc dot gnu.org> --- Author: glisse Date: Tue Apr 28 19:35:49 2015 New Revision: 222540 URL: https://gcc.gnu.org/viewcvs?rev=222540&root=gcc&view=rev Log: 2015-04-28 Marc Glisse <marc.glisse@inria.fr> PR libstdc++/65883 * include/std/limits (numeric_limits): Add missing unsigned. Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/include/std/limits ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libstdc++/65883] [5 Regression] numeric_limits<unsigned __int128>::max() returns incorrect value 2015-04-25 10:25 [Bug libstdc++/65883] New: numeric_limits<unsigned __int128>::max() returns incorrect value john at johnmaddock dot co.uk 2015-04-25 10:38 ` [Bug libstdc++/65883] [5/6 Regression] " glisse at gcc dot gnu.org 2015-04-28 19:36 ` glisse at gcc dot gnu.org @ 2015-04-28 19:46 ` glisse at gcc dot gnu.org 2015-05-04 18:20 ` jakub at gcc dot gnu.org 2015-05-04 18:30 ` jakub at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: glisse at gcc dot gnu.org @ 2015-04-28 19:46 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65883 Marc Glisse <glisse at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |wrong-code Known to work| |4.9.2, 6.0 Target Milestone|--- |5.2 Summary|[5/6 Regression] |[5 Regression] |numeric_limits<unsigned |numeric_limits<unsigned |__int128>::max() returns |__int128>::max() returns |incorrect value |incorrect value Known to fail| |5.1.0 --- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> --- Fixed on trunk. This needs to be backported to 5, but I don't have time to do it right now, anyone feel free... ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libstdc++/65883] [5 Regression] numeric_limits<unsigned __int128>::max() returns incorrect value 2015-04-25 10:25 [Bug libstdc++/65883] New: numeric_limits<unsigned __int128>::max() returns incorrect value john at johnmaddock dot co.uk ` (2 preceding siblings ...) 2015-04-28 19:46 ` [Bug libstdc++/65883] [5 " glisse at gcc dot gnu.org @ 2015-05-04 18:20 ` jakub at gcc dot gnu.org 2015-05-04 18:30 ` jakub at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu.org @ 2015-05-04 18:20 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65883 --- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Author: jakub Date: Mon May 4 18:20:10 2015 New Revision: 222772 URL: https://gcc.gnu.org/viewcvs?rev=222772&root=gcc&view=rev Log: Backported from mainline 2015-04-28 Marc Glisse <marc.glisse@inria.fr> PR libstdc++/65883 * include/std/limits (numeric_limits): Add missing unsigned. Modified: branches/gcc-5-branch/libstdc++-v3/ChangeLog branches/gcc-5-branch/libstdc++-v3/include/std/limits ^ permalink raw reply [flat|nested] 6+ messages in thread
* [Bug libstdc++/65883] [5 Regression] numeric_limits<unsigned __int128>::max() returns incorrect value 2015-04-25 10:25 [Bug libstdc++/65883] New: numeric_limits<unsigned __int128>::max() returns incorrect value john at johnmaddock dot co.uk ` (3 preceding siblings ...) 2015-05-04 18:20 ` jakub at gcc dot gnu.org @ 2015-05-04 18:30 ` jakub at gcc dot gnu.org 4 siblings, 0 replies; 6+ messages in thread From: jakub at gcc dot gnu.org @ 2015-05-04 18:30 UTC (permalink / raw) To: gcc-bugs https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65883 Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED CC| |jakub at gcc dot gnu.org Resolution|--- |FIXED --- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Done now. ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2015-05-04 18:30 UTC | newest] Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2015-04-25 10:25 [Bug libstdc++/65883] New: numeric_limits<unsigned __int128>::max() returns incorrect value john at johnmaddock dot co.uk 2015-04-25 10:38 ` [Bug libstdc++/65883] [5/6 Regression] " glisse at gcc dot gnu.org 2015-04-28 19:36 ` glisse at gcc dot gnu.org 2015-04-28 19:46 ` [Bug libstdc++/65883] [5 " glisse at gcc dot gnu.org 2015-05-04 18:20 ` jakub at gcc dot gnu.org 2015-05-04 18:30 ` jakub at gcc dot gnu.org
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