| /* Return positive difference between arguments. |
| Copyright (C) 1997-2016 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. |
| |
| 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 <errno.h> |
| #include <math.h> |
| |
| float |
| __fdimf (float x, float y) |
| { |
| int clsx = fpclassify (x); |
| int clsy = fpclassify (y); |
| |
| if (clsx == FP_NAN || clsy == FP_NAN) |
| /* Raise invalid flag for signaling but not quiet NaN. */ |
| return x - y; |
| |
| if (x <= y) |
| return 0.0f; |
| |
| float r = x - y; |
| if (fpclassify (r) == FP_INFINITE |
| && clsx != FP_INFINITE && clsy != FP_INFINITE) |
| __set_errno (ERANGE); |
| |
| return r; |
| } |
| weak_alias (__fdimf, fdimf) |