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[Bug math/3976] libm rounding modes do not work correctly for many archs
- From: "jsm28 at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: Wed, 29 Feb 2012 01:14:47 +0000
- Subject: [Bug math/3976] libm rounding modes do not work correctly for many archs
- Auto-submitted: auto-generated
- References: <bug-3976-131@http.sourceware.org/bugzilla/>
http://sourceware.org/bugzilla/show_bug.cgi?id=3976
Joseph Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
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AssignedTo|aj at suse dot de |unassigned at sourceware
| |dot org
--- Comment #8 from Joseph Myers <jsm28 at gcc dot gnu.org> 2012-02-29 01:14:47 UTC ---
Problem with exp confirmed on x86_64 with current sources.
Patch for exp proposed:
http://sourceware.org/ml/libc-alpha/2012-02/msg00748.html
Given that patch applied:
* I cannot confirm the problem with sin or cos on x86_64 (though tests should
be added to the testsuite).
* pow (1.6, 1.6) does not segfault, but the result in round-upward mode is
substantially inaccurate; pow will need a similar fix (and test in the
testsuite).
If other functions have problems in current sources, it would be best to have a
separate bug for each function with problems (identifying clearly the platform
on which the problem occurs).
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