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From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org> To: glibc-bugs@sourceware.org Subject: [Bug math/19032] [i386] acosh (-qNaN) spurious "invalid" exception Date: Wed, 30 Sep 2015 21:45:00 -0000 [thread overview] Message-ID: <bug-19032-131-5aylxFqLnu@http.sourceware.org/bugzilla/> (raw) In-Reply-To: <bug-19032-131@http.sourceware.org/bugzilla/> https://sourceware.org/bugzilla/show_bug.cgi?id=19032 --- 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 8c6c9236361fbc077769673c259828216403bc33 (commit) from 93e448cbed1095c88133f2a304b1bbba72e480af (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=8c6c9236361fbc077769673c259828216403bc33 commit 8c6c9236361fbc077769673c259828216403bc33 Author: Joseph Myers <joseph@codesourcery.com> Date: Wed Sep 30 21:44:42 2015 +0000 Fix i386 acosh (-qNaN) spurious "invalid" exception. The i386 versions of acoshf and acosh raise a spurious "invalid" exception for an argument that is a quiet NaN with the sign bit set. The integer arithmetic to detect arguments < 1 also detects -NaN, and then the computation 0 / 0 in that case raises the exception. This patch fixes this by using (x - x) / (x - x) as the computation in that case instead, which will always raise the exception for non-NaN arguments reaching that code, but not for quiet NaN arguments. Tested for x86_64 and x86. [BZ #19032] * sysdeps/i386/fpu/e_acosh.S (__ieee754_acosh): For arguments < 1, compute result as (x - x) / (x - x) not as 0 / 0. * sysdeps/i386/fpu/e_acoshf.S (__ieee754_acoshf): Likewise. * math/libm-test.inc (acosh_test_data): Add another test of acosh. ----------------------------------------------------------------------- Summary of changes: ChangeLog | 6 ++++++ NEWS | 2 +- math/libm-test.inc | 1 + sysdeps/i386/fpu/e_acosh.S | 5 +++-- sysdeps/i386/fpu/e_acoshf.S | 5 +++-- 5 files changed, 14 insertions(+), 5 deletions(-) -- You are receiving this mail because: You are on the CC list for the bug.
next prev parent reply other threads:[~2015-09-30 21:45 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-09-30 17:50 [Bug math/19032] New: " jsm28 at gcc dot gnu.org 2015-09-30 18:07 ` [Bug math/19032] " cvs-commit at gcc dot gnu.org 2015-09-30 21:45 ` cvs-commit at gcc dot gnu.org [this message] 2015-09-30 21:46 ` jsm28 at gcc dot gnu.org
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