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1 | /* Copyright (C) 2011-2016 Free Software Foundation, Inc. | |
2 | This file is part of the GNU C Library. | |
3 | Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. | |
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 | ||
19 | #if !defined _BYTESWAP_H && !defined _NETINET_IN_H && !defined _ENDIAN_H | |
20 | # error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead." | |
21 | #endif | |
22 | ||
23 | #ifndef _BITS_BYTESWAP_H | |
24 | #define _BITS_BYTESWAP_H 1 | |
25 | ||
26 | #include <bits/types.h> | |
27 | ||
28 | /* gcc __builtin_bswap64() can constant-fold, etc, so always use it. */ | |
29 | #define __bswap_16(x) ((unsigned short)(__builtin_bswap32(x) >> 16)) | |
30 | #define __bswap_32(x) ((unsigned int)__builtin_bswap32(x)) | |
31 | #define __bswap_64(x) ((__uint64_t)__builtin_bswap64(x)) | |
32 | ||
33 | #define __bswap_constant_16(x) __bswap_16(x) | |
34 | #define __bswap_constant_32(x) __bswap_32(x) | |
35 | #define __bswap_constant_64(x) __bswap_64(x) | |
36 | ||
37 | #endif /* _BITS_BYTESWAP_H */ |