| /* Return classification value corresponding to argument. |
| Copyright (C) 1997-2014 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 <math.h> |
| |
| #include <math_private.h> |
| |
| |
| int |
| __fpclassify (double x) |
| { |
| u_int32_t hx, lx; |
| int retval = FP_NORMAL; |
| |
| EXTRACT_WORDS (hx, lx, x); |
| lx |= hx & 0xfffff; |
| hx &= 0x7ff00000; |
| if ((hx | lx) == 0) |
| retval = FP_ZERO; |
| else if (hx == 0) |
| retval = FP_SUBNORMAL; |
| else if (hx == 0x7ff00000) |
| retval = lx != 0 ? FP_NAN : FP_INFINITE; |
| |
| return retval; |
| } |
| libm_hidden_def (__fpclassify) |
