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
23long 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

source code of glibc/sysdeps/sparc/sparc32/q_neg.c