| /* Copyright (C) 2012-2016 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 <limits.h> |
| #include <math_private.h> |
| |
| /* wrapper ilogb */ |
| int |
| __ilogb (double x) |
| { |
| int r = __ieee754_ilogb (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 (__ilogb, ilogb) |
| #ifdef NO_LONG_DOUBLE |
| strong_alias (__ilogb, __ilogbl) |
| weak_alias (__ilogb, ilogbl) |
| #endif |