1 #ifndef _BITS_BYTESWAP_H
2 #define _BITS_BYTESWAP_H
6 * Byte-order swapping functions
12 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
14 static inline __attribute__ (( always_inline, const )) uint16_t
15 __bswap_variable_16 ( uint16_t x ) {
16 __asm__ ( "xchgb %b0,%h0" : "=Q" ( x ) : "0" ( x ) );
20 static inline __attribute__ (( always_inline )) void
21 __bswap_16s ( uint16_t *x ) {
22 __asm__ ( "rorw $8, %0" : "+m" ( *x ) );
25 static inline __attribute__ (( always_inline, const )) uint32_t
26 __bswap_variable_32 ( uint32_t x ) {
27 __asm__ ( "bswapl %k0" : "=r" ( x ) : "0" ( x ) );
31 static inline __attribute__ (( always_inline )) void
32 __bswap_32s ( uint32_t *x ) {
33 __asm__ ( "bswapl %k0" : "=r" ( *x ) : "0" ( *x ) );
36 static inline __attribute__ (( always_inline, const )) uint64_t
37 __bswap_variable_64 ( uint64_t x ) {
38 __asm__ ( "bswapq %q0" : "=r" ( x ) : "0" ( x ) );
42 static inline __attribute__ (( always_inline )) void
43 __bswap_64s ( uint64_t *x ) {
44 __asm__ ( "bswapq %q0" : "=r" ( *x ) : "0" ( *x ) );
47 #endif /* _BITS_BYTESWAP_H */