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[Bug math/16517] Missing underflow exception from tanf/tan/tanl
- From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Fri, 07 Aug 2015 23:11:34 +0000
- Subject: [Bug math/16517] Missing underflow exception from tanf/tan/tanl
- Auto-submitted: auto-generated
- References: <bug-16517-131 at http dot sourceware dot org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=16517
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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=37550cb3d6591a8f443467707ec80b4ab5c2e157
commit 37550cb3d6591a8f443467707ec80b4ab5c2e157
Author: Joseph Myers <joseph@codesourcery.com>
Date: Fri Aug 7 23:10:35 2015 +0000
Fix tan missing underflows (bug 16517).
Similar to various other bugs in this area, some tan implementations
do not raise the underflow exception for subnormal arguments, when the
result is tiny and inexact. This patch forces the exception in a
similar way to previous fixes.
Tested for x86_64, x86, mips64 and powerpc.
[BZ #16517]
* sysdeps/ieee754/dbl-64/s_tan.c: Include <float.h>.
(tan): Force underflow exception for arguments with small absolute
value.
* sysdeps/ieee754/flt-32/k_tanf.c: Include <float.h>.
(__kernel_tanf): Force underflow exception for arguments with
small absolute value.
* sysdeps/ieee754/ldbl-128/k_tanl.c: Include <float.h>.
(__kernel_tanl): Force underflow exception for arguments with
small absolute value.
* sysdeps/ieee754/ldbl-128ibm/k_tanl.c: Include <float.h>.
(__kernel_tanl): Force underflow exception for arguments with
small absolute value.
* sysdeps/ieee754/ldbl-96/k_tanl.c: Include <float.h>.
(__kernel_tanl): Force underflow exception for arguments with
small absolute value.
* math/auto-libm-test-in: Add more tests of tan.
* math/auto-libm-test-out: Regenerated.
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 21 +++
NEWS | 2 +-
math/auto-libm-test-in | 4 +
math/auto-libm-test-out | 316 ++++++++++++++++++++++++++++++++++
sysdeps/ieee754/dbl-64/s_tan.c | 6 +
sysdeps/ieee754/flt-32/k_tanf.c | 13 ++-
sysdeps/ieee754/ldbl-128/k_tanl.c | 12 ++-
sysdeps/ieee754/ldbl-128ibm/k_tanl.c | 12 ++-
sysdeps/ieee754/ldbl-96/k_tanl.c | 12 ++-
9 files changed, 393 insertions(+), 5 deletions(-)
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