mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-09 23:00:07 +00:00
62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/* Copyright (C) 2011-2023 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <fenv.h>
|
|
#include <math.h>
|
|
#include <math_private.h>
|
|
#include <math-svid-compat.h>
|
|
#include <libm-alias-double.h>
|
|
|
|
|
|
#if LIBM_SVID_COMPAT && (SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29) \
|
|
|| defined NO_LONG_DOUBLE \
|
|
|| defined LONG_DOUBLE_COMPAT)
|
|
/* wrapper log(x) */
|
|
double
|
|
__log_compat (double x)
|
|
{
|
|
if (__builtin_expect (islessequal (x, 0.0), 0) && _LIB_VERSION != _IEEE_)
|
|
{
|
|
if (x == 0.0)
|
|
{
|
|
__feraiseexcept (FE_DIVBYZERO);
|
|
return __kernel_standard (x, x, 16); /* log(0) */
|
|
}
|
|
else
|
|
{
|
|
__feraiseexcept (FE_INVALID);
|
|
return __kernel_standard (x, x, 17); /* log(x<0) */
|
|
}
|
|
}
|
|
|
|
return __ieee754_log (x);
|
|
}
|
|
# if SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_29)
|
|
compat_symbol (libm, __log_compat, log, GLIBC_2_0);
|
|
# endif
|
|
# ifdef NO_LONG_DOUBLE
|
|
weak_alias (__log_compat, logl)
|
|
# endif
|
|
# ifdef LONG_DOUBLE_COMPAT
|
|
/* Work around gas bug "multiple versions for symbol". */
|
|
weak_alias (__log_compat, __log_compat_alias)
|
|
|
|
LONG_DOUBLE_COMPAT_CHOOSE_libm_logl (
|
|
compat_symbol (libm, __log_compat_alias, logl, FIRST_VERSION_libm_logl), );
|
|
# endif
|
|
#endif
|