1 | /* Software floating-point emulation. |
2 | Return !a |
3 | Copyright (C) 1997-2024 Free Software Foundation, Inc. |
4 | This file is part of the GNU C Library. |
5 | |
6 | The GNU C Library is free software; you can redistribute it and/or |
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. |
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 |
14 | Lesser General Public License for more details. |
15 | |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, see |
18 | <https://www.gnu.org/licenses/>. */ |
19 | |
20 | #include "soft-fp.h" |
21 | #include "quad.h" |
22 | |
23 | long double _Q_neg(const long double a) |
24 | { |
25 | union { |
26 | long double ldbl; |
27 | UWtype words[4]; |
28 | } c; |
29 | |
30 | c.ldbl = a; |
31 | |
32 | #if (__BYTE_ORDER == __BIG_ENDIAN) |
33 | c.words[0] ^= (((UWtype)1) << (W_TYPE_SIZE - 1)); |
34 | #elif (__BYTE_ORDER == __LITTLE_ENDIAN) && (W_TYPE_SIZE == 64) |
35 | c.words[1] ^= (((UWtype)1) << (W_TYPE_SIZE - 1)); |
36 | #elif (__BYTE_ORDER == __LITTLE_ENDIAN) && (W_TYPE_SIZE == 32) |
37 | c.words[3] ^= (((UWtype)1) << (W_TYPE_SIZE - 1)); |
38 | #else |
39 | FP_DECL_Q(A); FP_DECL_Q(C); |
40 | |
41 | FP_UNPACK_RAW_Q(A, a); |
42 | FP_NEG_Q(C, A); |
43 | FP_PACK_RAW_Q(c.ldbl, C); |
44 | #endif |
45 | return c.ldbl; |
46 | } |
47 | |