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[Bug math/18586] [ldbl-128] expl missing underflows
- From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Wed, 24 Jun 2015 15:13:13 +0000
- Subject: [Bug math/18586] [ldbl-128] expl missing underflows
- Auto-submitted: auto-generated
- References: <bug-18586-131 at http dot sourceware dot org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=18586
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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=8475ab16848cf2adb6ce3446749c2f1d10233286
commit 8475ab16848cf2adb6ce3446749c2f1d10233286
Author: Joseph Myers <joseph@codesourcery.com>
Date: Wed Jun 24 15:12:03 2015 +0000
Fix ldbl-128 expl missing underflows (bug 18586).
Similar to various other bugs in this area, the ldbl-128 expl
implementation does not raise the underflow exception for all
subnormal results, if the scaling down is exact although the actual
result is inexact. This patch fixes this by forcing the exception in
this case (the tests that failed before and pass after the test are
already in the testsuite).
Tested for mips64.
[BZ #18586]
* sysdeps/ieee754/ldbl-128/e_expl.c (__ieee754_expl): Force
underflow exception for small results.
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 6 ++++++
NEWS | 2 +-
sysdeps/ieee754/ldbl-128/e_expl.c | 10 +++++++++-
3 files changed, 16 insertions(+), 2 deletions(-)
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