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8466ee1c | 1 | /* Return nonzero value if number is negative. |
688903eb | 2 | Copyright (C) 2017-2018 Free Software Foundation, Inc. |
8466ee1c GG |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
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. | |
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 | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <http://www.gnu.org/licenses/>. */ | |
18 | ||
302bb1a3 | 19 | #include <float128_private.h> |
8466ee1c GG |
20 | #include <math.h> |
21 | #include <math_private.h> | |
22 | ||
23 | /* Once GCC >= 6.0 is required for building glibc, this implementation can | |
24 | be removed and replaced with an inclusion of ldbl-128/s_signbitl.c. */ | |
25 | int | |
26 | __signbitf128 (_Float128 x) | |
27 | { | |
28 | #if __GNUC_PREREQ (6, 0) | |
29 | return __builtin_signbit (x); | |
30 | #else | |
31 | int64_t e; | |
32 | ||
33 | GET_FLOAT128_MSW64 (e, x); | |
34 | return e < 0; | |
35 | #endif | |
36 | } | |
37 | hidden_def (__signbitf128) |