Bug 2554 - Incorrect return from float y1 (0X1.27E204P+99)
Summary: Incorrect return from float y1 (0X1.27E204P+99)
Alias: None
Product: glibc
Classification: Unclassified
Component: math (show other bugs)
Version: unspecified
: P2 normal
Target Milestone: ---
Assignee: Not yet assigned to anyone
Depends on:
Reported: 2006-04-12 22:32 UTC by H.J. Lu
Modified: 2019-04-10 09:16 UTC (History)
1 user (show)

See Also:
Host: x86_64-unknown-linux-gnu
Target: x86_64-unknown-linux-gnu
Build: x86_64-unknown-linux-gnu
Last reconfirmed:
fweimer: security-


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Description H.J. Lu 2006-04-12 22:32:51 UTC
Failure: Test: y1 (0X1.27E204P+99) == -0X1.FFFD6EP-51
 is:          0.00000000000000000000e+00   0x0.00000000000000000000p+0
 should be:  -8.88161002585147315788e-16  -0x1.fffd6e00000000000000p-51
 difference:  8.88161002585147315788e-16   0x1.fffd6e00000000000000p-51
 ulp       :  16776887.0000
 max.ulp   :  0.0000
Comment 1 Ulrich Drepper 2006-04-16 02:46:27 UTC
libm bugs remain suspended until somebody comes up with a patch.  This doesn't
mean that the expected behavior here is correct.
Comment 2 Joseph Myers 2012-02-23 02:51:00 UTC
See http://sourceware.org/ml/libc-alpha/2012-02/msg00512.html for analysis.
Comment 3 Joseph Myers 2012-03-16 20:14:24 UTC
Fixed by:

commit c36e1d2369f149a64c759f3ad6f4cc5a03b03b62
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Fri Mar 16 20:08:02 2012 +0000

    Disable Bessel function TLOSS errors in POSIX mode.