xref: /openbmc/qemu/pc-bios/s390-ccw/bswap.h (revision 709395f8)
1 /*
2  * Byte swap functions - taken from include/qemu/bswap.h
3  *
4  * This work is licensed under the terms of the GNU GPL, version 2 or (at
5  * your option) any later version. See the COPYING file in the top-level
6  * directory.
7  */
8 
9 static inline uint16_t bswap16(uint16_t x)
10 {
11     return ((x & 0x00ff) << 8) | ((x & 0xff00) >> 8);
12 }
13 
14 static inline uint32_t bswap32(uint32_t x)
15 {
16     return ((x & 0x000000ffU) << 24) | ((x & 0x0000ff00U) <<  8) |
17            ((x & 0x00ff0000U) >>  8) | ((x & 0xff000000U) >> 24);
18 }
19 
20 static inline uint64_t bswap64(uint64_t x)
21 {
22     return ((x & 0x00000000000000ffULL) << 56) |
23            ((x & 0x000000000000ff00ULL) << 40) |
24            ((x & 0x0000000000ff0000ULL) << 24) |
25            ((x & 0x00000000ff000000ULL) <<  8) |
26            ((x & 0x000000ff00000000ULL) >>  8) |
27            ((x & 0x0000ff0000000000ULL) >> 24) |
28            ((x & 0x00ff000000000000ULL) >> 40) |
29            ((x & 0xff00000000000000ULL) >> 56);
30 }
31