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From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org> To: glibc-bugs@sourceware.org Subject: [Bug math/16977] log10 (1) incorrect in round-downward mode Date: Fri, 23 May 2014 12:08:00 -0000 [thread overview] Message-ID: <bug-16977-131-mhWHuUaY8d@http.sourceware.org/bugzilla/> (raw) In-Reply-To: <bug-16977-131@http.sourceware.org/bugzilla/> https://sourceware.org/bugzilla/show_bug.cgi?id=16977 --- Comment #2 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 b72592e75fdecb34e2ac5f931730409a1fb68e8a (commit) from 2302d679ce8b36854022207b58e554b3e89dd8c7 (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=b72592e75fdecb34e2ac5f931730409a1fb68e8a commit b72592e75fdecb34e2ac5f931730409a1fb68e8a Author: Joseph Myers <joseph@codesourcery.com> Date: Fri May 23 12:07:50 2014 +0000 Fix log10 (1) in round-downward mode (bug 16977). As with various other issues of this kind, bug 16977 is log10 (1) wrongly returning -0 rather than +0 in round-downward mode because of an implementation effectively in terms of log1p (x - 1). This patch fixes the issue in the same way used for log. Tested x86_64 and x86 and ulps updated accordingly. Also tested for mips64 to confirm a fix was needed for ldbl-128 and to validate that fix (also applied to ldbl-128ibm since that version of logl is essentially the same as the ldbl-128 one). [BZ #16977] * sysdeps/i386/fpu/e_log10.S (__ieee754_log10): Take absolute value when x - 1 is zero. * sysdeps/i386/fpu/e_log10f.S (__ieee754_log10f): Likewise. * sysdeps/i386/fpu/e_log10l.S (__ieee754_log10l): Likewise. * sysdeps/ieee754/ldbl-128/e_log10l.c (__ieee754_log10l): Return 0.0L for an argument of 1.0L. * sysdeps/ieee754/ldbl-128ibm/e_log10l.c (__ieee754_log10l): Likewise. * sysdeps/x86_64/fpu/e_log10l.S (__ieee754_log10l): Take absolute value when x - 1 is zero. * math/libm-test.inc (log10_test): Use ALL_RM_TEST. * sysdeps/i386/fpu/libm-test-ulps: Update. * sysdeps/x86_64/fpu/libm-test-ulps: Likewise. ----------------------------------------------------------------------- Summary of changes: ChangeLog | 17 +++++++++++++++++ NEWS | 2 +- math/libm-test.inc | 4 +--- sysdeps/i386/fpu/e_log10.S | 8 +++++++- sysdeps/i386/fpu/e_log10f.S | 8 +++++++- sysdeps/i386/fpu/e_log10l.S | 8 +++++++- sysdeps/i386/fpu/libm-test-ulps | 24 ++++++++++++++++++++++++ sysdeps/ieee754/ldbl-128/e_log10l.c | 3 +++ sysdeps/ieee754/ldbl-128ibm/e_log10l.c | 3 +++ sysdeps/x86_64/fpu/e_log10l.S | 8 +++++++- sysdeps/x86_64/fpu/libm-test-ulps | 24 ++++++++++++++++++++++++ 11 files changed, 101 insertions(+), 8 deletions(-) -- You are receiving this mail because: You are on the CC list for the bug.
next prev parent reply other threads:[~2014-05-23 12:08 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-05-22 22:42 [Bug math/16977] New: " jsm28 at gcc dot gnu.org 2014-05-22 22:43 ` [Bug math/16977] " jsm28 at gcc dot gnu.org 2014-05-23 12:08 ` cvs-commit at gcc dot gnu.org [this message] 2014-05-23 12:09 ` jsm28 at gcc dot gnu.org 2014-06-12 19:17 ` fweimer at redhat dot com
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