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author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2018-12-27 16:39:27 +0000 |
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committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2018-12-27 16:39:27 +0000 |
commit | 52629237a522c7c146d788ddaaf69946fd2729f9 (patch) | |
tree | 552402b085cff37bc251fc0f45ed9255b53cdd57 /math/w_logf_compat.c | |
parent | 3896c5809b49e72fbadc57da2189ff42aa2a5d02 (diff) | |
parent | 064374be911f72dfaec8a75f06da1f9fc1827712 (diff) |
Merge commit 'refs/top-bases/t/hurdsig-boot-fix' into t/hurdsig-boot-fix
Diffstat (limited to 'math/w_logf_compat.c')
-rw-r--r-- | math/w_logf_compat.c | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/math/w_logf_compat.c b/math/w_logf_compat.c new file mode 100644 index 0000000000..9810d30c52 --- /dev/null +++ b/math/w_logf_compat.c @@ -0,0 +1,48 @@ +/* Copyright (C) 2011-2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@gmail.com>, 2011. + + 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 <fenv.h> +#include <math.h> +#include <math_private.h> +#include <math-svid-compat.h> +#include <libm-alias-float.h> + + +#if LIBM_SVID_COMPAT && SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_27) +/* wrapper logf(x) */ +float +__logf_compat (float x) +{ + if (__builtin_expect (islessequal (x, 0.0f), 0) && _LIB_VERSION != _IEEE_) + { + if (x == 0.0f) + { + feraiseexcept (FE_DIVBYZERO); + return __kernel_standard_f (x, x, 116); /* log(0) */ + } + else + { + feraiseexcept (FE_INVALID); + return __kernel_standard_f (x, x, 117); /* log(x<0) */ + } + } + + return __ieee754_logf (x); +} +compat_symbol (libm, __logf_compat, logf, GLIBC_2_0); +#endif |