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377a515b | 1 | /* Return classification value corresponding to argument. |
688903eb | 2 | Copyright (C) 1997-2018 Free Software Foundation, Inc. |
377a515b UD |
3 | This file is part of the GNU C Library. |
4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
377a515b UD |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
377a515b | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
377a515b UD |
19 | |
20 | #include <math.h> | |
21 | ||
1ed0291c | 22 | #include <math_private.h> |
377a515b UD |
23 | |
24 | ||
25 | int | |
26 | __fpclassifyf (float x) | |
27 | { | |
24ab7723 | 28 | uint32_t wx; |
377a515b UD |
29 | int retval = FP_NORMAL; |
30 | ||
31 | GET_FLOAT_WORD (wx, x); | |
32 | wx &= 0x7fffffff; | |
33 | if (wx == 0) | |
34 | retval = FP_ZERO; | |
be2925fc | 35 | else if (wx < 0x800000) |
377a515b | 36 | retval = FP_SUBNORMAL; |
81e9dad6 UD |
37 | else if (wx >= 0x7f800000) |
38 | retval = wx > 0x7f800000 ? FP_NAN : FP_INFINITE; | |
377a515b UD |
39 | |
40 | return retval; | |
41 | } | |
76f2646f | 42 | libm_hidden_def (__fpclassifyf) |