| /* Wrapper to implement llogb in terms of ilogb. |
| Copyright (C) 2012-2018 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 |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <math.h> |
| #include <errno.h> |
| #include <limits.h> |
| #include <math_private.h> |
| |
| long int |
| M_DECL_FUNC (__llogb) (FLOAT x) |
| { |
| int r = M_SUF (__ieee754_ilogb) (x); |
| long int lr = r; |
| if (__glibc_unlikely (r == FP_ILOGB0) |
| || __glibc_unlikely (r == FP_ILOGBNAN) |
| || __glibc_unlikely (r == INT_MAX)) |
| { |
| #if LONG_MAX != INT_MAX |
| if (r == FP_ILOGB0) |
| lr = FP_LLOGB0; |
| else if (r == FP_ILOGBNAN) |
| lr = FP_LLOGBNAN; |
| else |
| lr = LONG_MAX; |
| #endif |
| __set_errno (EDOM); |
| __feraiseexcept (FE_INVALID); |
| } |
| return lr; |
| } |
| declare_mgen_alias (__llogb, llogb) |
