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[Bug math/16386] ldbl-128ibm logl inaccurate
- From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Thu, 02 Jan 2014 16:36:24 +0000
- Subject: [Bug math/16386] ldbl-128ibm logl inaccurate
- Auto-submitted: auto-generated
- References: <bug-16386-131 at http dot sourceware dot org/bugzilla/>
http://sourceware.org/bugzilla/show_bug.cgi?id=16386
--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
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- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=819e5d50dd4d10dc359037eba74c70e74cb42739
commit 819e5d50dd4d10dc359037eba74c70e74cb42739
Author: Joseph Myers <joseph@codesourcery.com>
Date: Thu Jan 2 16:35:46 2014 +0000
Fix ldbl-128ibm logl inaccuracy (bug 16386).
This patch fixes bug 16386, ldbl-128ibm logl inaccuracy (with
consequent inaccuracy for lgammal) for arguments where the high double
is subnormal, which showed up while attempting to regenerate ulps for
powerpc-nofpu for 2.19. The problem here is logic failing to allow
for subnormals when calculating the exponent of the argument. Tested
for powerpc-nofpu.
* sysdeps/ieee754/ldbl-128ibm/e_logl.c (__ieee754_logl): Adjust
numbers with subnormal high part when calculating exponent.
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 4 ++++
NEWS | 3 ++-
sysdeps/ieee754/ldbl-128ibm/e_logl.c | 8 ++++++++
3 files changed, 14 insertions(+), 1 deletions(-)
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