diff options
Diffstat (limited to 'math/w_ilogbf.c')
| -rw-r--r-- | math/w_ilogbf.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/math/w_ilogbf.c b/math/w_ilogbf.c new file mode 100644 index 0000000000..ae3574a75d --- /dev/null +++ b/math/w_ilogbf.c @@ -0,0 +1,38 @@ +/* Copyright (C) 2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Adhemerval Zanella <azanella@linux.vnet.ibm.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 <math.h> +#include <errno.h> +#include <math_private.h> + +/* wrapper ilogbf */ +int +__ilogbf (float x) +{ + int r = __ieee754_ilogbf (x); + if (__builtin_expect (r == FP_ILOGB0, 0) + || __builtin_expect (r == FP_ILOGBNAN, 0) + || __builtin_expect (r == INT_MAX, 0)) + { + __set_errno (EDOM); + feraiseexcept (FE_INVALID); + } + return r; +} + +weak_alias (__ilogbf, ilogbf) |