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[Bug math/3976] libm rounding modes do not work correctly for many archs


http://sourceware.org/bugzilla/show_bug.cgi?id=3976

Joseph Myers <jsm28 at gcc dot gnu.org> changed:

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         AssignedTo|aj at suse dot de           |unassigned at sourceware
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--- 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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