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[Bug math/19016] clog, clog10 inaccuracy
- From: "jsm28 at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Mon, 28 Sep 2015 20:16:07 +0000
- Subject: [Bug math/19016] clog, clog10 inaccuracy
- Auto-submitted: auto-generated
- References: <bug-19016-131 at http dot sourceware dot org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=19016
Joseph Myers <jsm28 at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|clog10 inaccuracy |clog, clog10 inaccuracy
--- Comment #1 from Joseph Myers <jsm28 at gcc dot gnu.org> ---
Also for clog, e.g. for long double on x86_64:
Failure: Test: Real part of: clog_towardzero (0xb.fffffffffff8p-4 +
0x7.fffff8p-4 i)
Result:
is: -1.03819700729014380504e-01 -0xd.49f6c5a7e34c9b900000p-7
should be: -1.03819700729014380416e-01 -0xd.49f6c5a7e34c9ac00000p-7
difference: 8.80914265144472352631e-20 0xd.00000000000000000000p-67
ulp : 13.0000
max.ulp : 8.0000
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