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| author | Stefan Liebler <stli@linux.vnet.ibm.com> | 2015-04-13 21:16:56 +0200 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@linux.vnet.ibm.com> | 2015-04-13 21:19:27 +0200 |
| commit | de8aadd52c97f9a04d5e8709b16dc5baf9292a09 (patch) | |
| tree | b175bb57f828c47ece2f9a259efefa9a39cbc1b6 /math/w_log1pf.c | |
| parent | 7378b1f8f8ef25017d36af60e2d6a42939d74526 (diff) | |
| download | glibc-de8aadd52c97f9a04d5e8709b16dc5baf9292a09.tar glibc-de8aadd52c97f9a04d5e8709b16dc5baf9292a09.tar.gz glibc-de8aadd52c97f9a04d5e8709b16dc5baf9292a09.tar.bz2 glibc-de8aadd52c97f9a04d5e8709b16dc5baf9292a09.zip | |
Set errno for log1p on pole/domain error.
According to bug 6792, errno is not set to ERANGE/EDOM
by calling log1p/log1pf/log1pl with x = -1 or x < -1.
This patch adds a wrapper which sets errno in those cases
and returns the value of the existing __log1p function.
The log1p is now an alias to the wrapper function
instead of __log1p.
The files in sysdeps are reflecting these changes.
The ia64 implementation sets errno by itself,
thus the wrapper-file is empty.
The libm-test is adjusted for log1p-tests to check errno.
[BZ #6792]
* math/w_log1p.c: New file.
* math/w_log1pf.c: Likewise.
* math/w_log1pl.c: Likewise.
* math/Makefile (libm-calls): Add w_log1p.
* math/s_log1pl.c (log1pl): Remove weak_alias.
* sysdeps/i386/fpu/s_log1p.S (log1p): Likewise.
* sysdeps/i386/fpu/s_log1pf.S (log1pf): Likewise.
* sysdeps/i386/fpu/s_log1pl.S (log1pl): Likewise.
* sysdeps/x86_64/fpu/s_log1pl.S (log1pl): Likewise.
* sysdeps/ieee754/dbl-64/s_log1p.c (log1p): Likewise.
[NO_LONG_DOUBLE] (log1pl): Likewise.
* sysdeps/ieee754/flt-32/s_log1pf.c (log1pf): Likewise.
* sysdeps/ieee754/ldbl-128/s_log1pl.c (log1pl): Likewise.
* sysdeps/ieee754/ldbl-64-128/s_log1pl.c
(log1p): Remove long_double_symbol.
* sysdeps/ieee754/ldbl-128ibm/s_log1pl.c (log1pl): Likewise.
* sysdeps/ieee754/ldbl-64-128/w_log1pl.c: New file.
* sysdeps/ieee754/ldbl-128ibm/w_log1pl.c: Likewise.
* sysdeps/m68k/m680x0/fpu/s_log1p.c: Define empty weak_alias to
remove weak_alias for corresponding log1p function.
* sysdeps/m68k/m680x0/fpu/s_log1pf.c: Likewise.
* sysdeps/m68k/m680x0/fpu/s_log1pl.c: Likewise.
* sysdeps/ia64/fpu/w_log1p.c: New file.
* sysdeps/ia64/fpu/w_log1pf.c: Likewise.
* sysdeps/ia64/fpu/w_log1pl.c: Likewise.
* math/libm-test.inc (log1p_test_data): Add errno expectations.
Diffstat (limited to 'math/w_log1pf.c')
| -rw-r--r-- | math/w_log1pf.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/math/w_log1pf.c b/math/w_log1pf.c new file mode 100644 index 0000000000..80510b913a --- /dev/null +++ b/math/w_log1pf.c @@ -0,0 +1,36 @@ +/* Wrapper for __log1pf that handles setting errno. + Copyright (C) 2015 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <math.h> +#include <math_private.h> + +float +__w_log1pf (float x) +{ + if (__glibc_unlikely (islessequal (x, -1.0f))) + { + if (x == -1.0f) + __set_errno (ERANGE); + else + __set_errno (EDOM); + } + + return __log1pf (x); +} +weak_alias (__w_log1pf, log1pf) |