Bug 2551

Summary:	Incorrect return from float j0 (0X1.D7CE3AP+107)
Product:	glibc	Reporter:	H.J. Lu <hjl.tools>
Component:	math	Assignee:	Not yet assigned to anyone <unassigned>
Status:	RESOLVED FIXED
Severity:	normal	CC:	drepper.fsp, glibc-bugs
Priority:	P2	Flags:	fweimer: security-
Version:	unspecified
Target Milestone:	---
Host:	x86_64-unknown-linux-gnu	Target:	x86_64-unknown-linux-gnu
Build:	x86_64-unknown-linux-gnu	Last reconfirmed:

Description H.J. Lu 2006-04-12 22:29:19 UTC

Failure: Test: j0 (0X1.D7CE3AP+107) == 0X1.FFFE66P-56
Result:
 is:          0.00000000000000000000e+00   0x0.00000000000000000000p+0
 should be:   2.77552364715777667692e-17   0x1.fffe6600000000000000p-56
 difference:  2.77552364715777667692e-17   0x1.fffe6600000000000000p-56
 ulp       :  16777011.0000
 max.ulp   :  0.0000

Comment 1 Ulrich Drepper 2006-04-23 17:52:45 UTC

Suspended until somebody comes up with a patch.

Comment 2 Joseph Myers 2012-02-23 02:49:32 UTC

See http://sourceware.org/ml/libc-alpha/2012-02/msg00512.html for analysis.

Comment 3 Joseph Myers 2012-03-16 20:12:10 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.