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From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org> To: glibc-bugs@sourceware.org Subject: [Bug math/16287] ldbl-128 erfl spurious underflows Date: Tue, 24 Jun 2014 20:58:00 -0000 [thread overview] Message-ID: <bug-16287-131-ci7MVRhpUF@http.sourceware.org/bugzilla/> (raw) In-Reply-To: <bug-16287-131@http.sourceware.org/bugzilla/> https://sourceware.org/bugzilla/show_bug.cgi?id=16287 --- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> --- This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "GNU C Library master sources". The branch, master has been updated via e7dd3c8c1db8c6d293abb995e033893b7328ad19 (commit) from 0ea5d373c7984a1da2d0e990c6e78e6d6c24f91b (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=e7dd3c8c1db8c6d293abb995e033893b7328ad19 commit e7dd3c8c1db8c6d293abb995e033893b7328ad19 Author: Joseph Myers <joseph@codesourcery.com> Date: Tue Jun 24 20:56:56 2014 +0000 Fix ldbl-128 erfl spurious underflows (bug 16287). This patch fixes bug 16287, spurious underflows from ldbl-128 erfl arising from it calling erfcl for arguments with absolute value at least 1.0, although for large positive arguments erfcl correctly underflows but erfl shouldn't. The fix is simply to avoid calling erfcl, and just return 1, for arguments above a cut-off large enough that erfl correctly rounds to-nearest as 1 but not so large that erfcl underflows. Tested mips64. Also tested x86_64 and x86 to confirm the new tests (taken from the tests of erfc) don't cause any problems there; no ulps updates needed. [BZ #16287] * sysdeps/ieee754/ldbl-128/s_erfl.c (__erfl): Return 1 without calling __erfcl for arguments at least 16. * math/auto-libm-test-in: Add more tests of erf. * math/auto-libm-test-out: Regenerated. ----------------------------------------------------------------------- Summary of changes: ChangeLog | 6 + NEWS | 24 ++-- math/auto-libm-test-in | 10 ++ math/auto-libm-test-out | 294 +++++++++++++++++++++++++++++++++++++ sysdeps/ieee754/ldbl-128/s_erfl.c | 2 + 5 files changed, 324 insertions(+), 12 deletions(-) -- You are receiving this mail because: You are on the CC list for the bug.
prev parent reply other threads:[~2014-06-24 20:58 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-12-03 1:04 [Bug math/16287] New: " jsm28 at gcc dot gnu.org 2014-06-13 11:49 ` [Bug math/16287] " fweimer at redhat dot com 2014-06-24 20:58 ` jsm28 at gcc dot gnu.org 2014-06-24 20:58 ` cvs-commit at gcc dot gnu.org [this message]
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