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377a515b | 1 | /* Return classification value corresponding to argument. |
bfff8b1b | 2 | Copyright (C) 1997-2017 Free Software Foundation, Inc. |
377a515b | 3 | This file is part of the GNU C Library. |
abfbdde1 | 4 | Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and |
350635a5 | 5 | Jakub Jelinek <jj@ultra.linux.cz>, 1999. |
377a515b UD |
6 | |
7 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
8 | modify it under the terms of the GNU Lesser General Public |
9 | License as published by the Free Software Foundation; either | |
10 | version 2.1 of the License, or (at your option) any later version. | |
377a515b UD |
11 | |
12 | The GNU C Library is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 15 | Lesser General Public License for more details. |
377a515b | 16 | |
41bdb6e2 | 17 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
18 | License along with the GNU C Library; if not, see |
19 | <http://www.gnu.org/licenses/>. */ | |
377a515b UD |
20 | |
21 | #include <math.h> | |
22 | ||
1ed0291c | 23 | #include <math_private.h> |
377a515b UD |
24 | |
25 | ||
26 | int | |
15089e04 | 27 | __fpclassifyl (_Float128 x) |
377a515b | 28 | { |
abfbdde1 | 29 | u_int64_t hx, lx; |
377a515b UD |
30 | int retval = FP_NORMAL; |
31 | ||
abfbdde1 UD |
32 | GET_LDOUBLE_WORDS64 (hx, lx, x); |
33 | lx |= (hx & 0x0000ffffffffffffLL); | |
34 | hx &= 0x7fff000000000000LL; | |
377a515b UD |
35 | if ((hx | lx) == 0) |
36 | retval = FP_ZERO; | |
37 | else if (hx == 0) | |
38 | retval = FP_SUBNORMAL; | |
abfbdde1 | 39 | else if (hx == 0x7fff000000000000LL) |
377a515b UD |
40 | retval = lx != 0 ? FP_NAN : FP_INFINITE; |
41 | ||
42 | return retval; | |
43 | } | |
76f2646f | 44 | libm_hidden_def (__fpclassifyl) |