1 /* Return nonzero value if number is negative.
2 Copyright (C) 1997-2022 Free Software Foundation, Inc.
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 <https://www.gnu.org/licenses/>. */
18
19 #include <math.h>
20
21 #include <math_private.h>
22
23 int
__signbit(double x)24 __signbit (double x)
25 {
26 int32_t hx;
27
28 GET_HIGH_WORD (hx, x);
29 return hx & 0x80000000;
30 }
31 #ifdef NO_LONG_DOUBLE
32 strong_alias (__signbit, __signbitl)
33 #endif
34