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377a515b | 1 | /* Return classification value corresponding to argument. |
dff8da6b | 2 | Copyright (C) 1997-2024 Free Software Foundation, Inc. |
377a515b | 3 | This file is part of the GNU C Library. |
377a515b UD |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
377a515b UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
377a515b | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
377a515b UD |
18 | |
19 | #include <math.h> | |
20 | ||
1ed0291c | 21 | #include <math_private.h> |
377a515b UD |
22 | |
23 | ||
24 | int | |
15089e04 | 25 | __fpclassifyl (_Float128 x) |
377a515b | 26 | { |
24ab7723 | 27 | uint64_t hx, lx; |
377a515b UD |
28 | int retval = FP_NORMAL; |
29 | ||
abfbdde1 UD |
30 | GET_LDOUBLE_WORDS64 (hx, lx, x); |
31 | lx |= (hx & 0x0000ffffffffffffLL); | |
32 | hx &= 0x7fff000000000000LL; | |
377a515b UD |
33 | if ((hx | lx) == 0) |
34 | retval = FP_ZERO; | |
35 | else if (hx == 0) | |
36 | retval = FP_SUBNORMAL; | |
abfbdde1 | 37 | else if (hx == 0x7fff000000000000LL) |
377a515b UD |
38 | retval = lx != 0 ? FP_NAN : FP_INFINITE; |
39 | ||
40 | return retval; | |
41 | } | |
76f2646f | 42 | libm_hidden_def (__fpclassifyl) |