nptl/tst-thread-exit-clobber: Run with any C++ compiler
[glibc.git] / math / w_logf_compat.c
blob9810d30c522a11d5c8d6848f806b1d4006427689
1 /* Copyright (C) 2011-2018 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
19 #include <fenv.h>
20 #include <math.h>
21 #include <math_private.h>
22 #include <math-svid-compat.h>
23 #include <libm-alias-float.h>
26 #if LIBM_SVID_COMPAT && SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_27)
27 /* wrapper logf(x) */
28 float
29 __logf_compat (float x)
31 if (__builtin_expect (islessequal (x, 0.0f), 0) && _LIB_VERSION != _IEEE_)
33 if (x == 0.0f)
35 feraiseexcept (FE_DIVBYZERO);
36 return __kernel_standard_f (x, x, 116); /* log(0) */
38 else
40 feraiseexcept (FE_INVALID);
41 return __kernel_standard_f (x, x, 117); /* log(x<0) */
45 return __ieee754_logf (x);
47 compat_symbol (libm, __logf_compat, logf, GLIBC_2_0);
48 #endif