1 #ifndef _BYTESWAP_H
2 #define _BYTESWAP_H
3 
4 #include <features.h>
5 #include <stdint.h>
6 
7 #pragma clang system_header
8 
__bswap_16(uint16_t __x)9 static __inline uint16_t __bswap_16(uint16_t __x)
10 {
11 	return __x<<8 | __x>>8;
12 }
13 
__bswap_32(uint32_t __x)14 static __inline uint32_t __bswap_32(uint32_t __x)
15 {
16 	return __x>>24 | __x>>8&0xff00 | __x<<8&0xff0000 | __x<<24;
17 }
18 
__bswap_64(uint64_t __x)19 static __inline uint64_t __bswap_64(uint64_t __x)
20 {
21 	return __bswap_32(__x)+0ULL<<32 | __bswap_32(__x>>32);
22 }
23 
24 #define bswap_16(x) __bswap_16(x)
25 #define bswap_32(x) __bswap_32(x)
26 #define bswap_64(x) __bswap_64(x)
27 
28 #endif
29