public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug libstdc++/50510] transposed variable names in std::seed_seq::generate
2011-09-24 22:35 [Bug libstdc++/50510] New: transposed variable names in std::seed_seq::generate john.salmon at deshaw dot com
@ 2011-09-24 22:35 ` paolo.carlini at oracle dot com
2011-09-24 22:36 ` paolo at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: paolo.carlini at oracle dot com @ 2011-09-24 22:35 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50510
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2011-09-24
Ever Confirmed|0 |1
--- Comment #1 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-09-24 22:27:00 UTC ---
Ok, thanks.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug libstdc++/50510] New: transposed variable names in std::seed_seq::generate
@ 2011-09-24 22:35 john.salmon at deshaw dot com
2011-09-24 22:35 ` [Bug libstdc++/50510] " paolo.carlini at oracle dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: john.salmon at deshaw dot com @ 2011-09-24 22:35 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50510
Bug #: 50510
Summary: transposed variable names in std::seed_seq::generate
Classification: Unclassified
Product: gcc
Version: 4.6.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: john.salmon@deshaw.com
The C++11 "Final Draft International Standard" (FDIS n3290.pdf) fixes a defect
in the "Final Committee Draft" (FCD n3092.pdf), swapping the use of the
intermediate variables r3 and r4 in the std::seed_seq::generate() function.
See 25.5.7.1 paragraph 8c. This patch brings libstdc++ up-to-date:
salmonj@drdlogin0039.en.desres$ diff -u oldrandom.tcc random.tcc
--- oldrandom.tcc 2011-09-19 10:04:46.836512000 -0400
+++ random.tcc 2011-09-24 17:45:02.879621416 -0400
@@ -2796,8 +2796,8 @@
_Type __r4 = __r3 - __k % __n;
__r4 = __detail::__mod<_Type,
__detail::_Shift<_Type, 32>::__value>(__r4);
- __begin[(__k + __p) % __n] ^= __r4;
- __begin[(__k + __q) % __n] ^= __r3;
+ __begin[(__k + __p) % __n] ^= __r3;
+ __begin[(__k + __q) % __n] ^= __r4;
__begin[__k % __n] = __r4;
}
}
salmonj@drdlogin0039.en.desres$
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug libstdc++/50510] transposed variable names in std::seed_seq::generate
2011-09-24 22:35 [Bug libstdc++/50510] New: transposed variable names in std::seed_seq::generate john.salmon at deshaw dot com
2011-09-24 22:35 ` [Bug libstdc++/50510] " paolo.carlini at oracle dot com
@ 2011-09-24 22:36 ` paolo at gcc dot gnu.org
2011-09-24 22:44 ` paolo at gcc dot gnu.org
2011-09-24 22:46 ` paolo.carlini at oracle dot com
3 siblings, 0 replies; 5+ messages in thread
From: paolo at gcc dot gnu.org @ 2011-09-24 22:36 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50510
--- Comment #2 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 2011-09-24 22:34:57 UTC ---
Author: paolo
Date: Sat Sep 24 22:34:50 2011
New Revision: 179149
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=179149
Log:
2011-09-24 John Salmon <john.salmon@deshaw.com>
PR libstdc++/50510
* include/bits/random.tcc (seed_seq::generate): Fix computation.
Modified:
trunk/libstdc++-v3/ChangeLog
trunk/libstdc++-v3/include/bits/random.tcc
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug libstdc++/50510] transposed variable names in std::seed_seq::generate
2011-09-24 22:35 [Bug libstdc++/50510] New: transposed variable names in std::seed_seq::generate john.salmon at deshaw dot com
2011-09-24 22:35 ` [Bug libstdc++/50510] " paolo.carlini at oracle dot com
2011-09-24 22:36 ` paolo at gcc dot gnu.org
@ 2011-09-24 22:44 ` paolo at gcc dot gnu.org
2011-09-24 22:46 ` paolo.carlini at oracle dot com
3 siblings, 0 replies; 5+ messages in thread
From: paolo at gcc dot gnu.org @ 2011-09-24 22:44 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50510
--- Comment #3 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 2011-09-24 22:35:11 UTC ---
Author: paolo
Date: Sat Sep 24 22:35:02 2011
New Revision: 179150
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=179150
Log:
2011-09-24 John Salmon <john.salmon@deshaw.com>
PR libstdc++/50510
* include/bits/random.tcc (seed_seq::generate): Fix computation.
Modified:
branches/gcc-4_6-branch/libstdc++-v3/ChangeLog
branches/gcc-4_6-branch/libstdc++-v3/include/bits/random.tcc
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug libstdc++/50510] transposed variable names in std::seed_seq::generate
2011-09-24 22:35 [Bug libstdc++/50510] New: transposed variable names in std::seed_seq::generate john.salmon at deshaw dot com
` (2 preceding siblings ...)
2011-09-24 22:44 ` paolo at gcc dot gnu.org
@ 2011-09-24 22:46 ` paolo.carlini at oracle dot com
3 siblings, 0 replies; 5+ messages in thread
From: paolo.carlini at oracle dot com @ 2011-09-24 22:46 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50510
Paolo Carlini <paolo.carlini at oracle dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
Target Milestone|--- |4.6.2
--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-09-24 22:35:52 UTC ---
Done.
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2011-09-24 22:36 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2011-09-24 22:35 [Bug libstdc++/50510] New: transposed variable names in std::seed_seq::generate john.salmon at deshaw dot com
2011-09-24 22:35 ` [Bug libstdc++/50510] " paolo.carlini at oracle dot com
2011-09-24 22:36 ` paolo at gcc dot gnu.org
2011-09-24 22:44 ` paolo at gcc dot gnu.org
2011-09-24 22:46 ` paolo.carlini at oracle dot com
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).