include/asm-x86_64/byteorder.h

   1 #ifndef _X86_64_BYTEORDER_H
   2 #define _X86_64_BYTEORDER_H
   3
   4 #include <asm/types.h>
   5 #include <linux/compiler.h>
   6
   7 #ifdef __GNUC__
   8
   9 static __inline__ __attribute_const__ __u64 ___arch__swab64(__u64 x)
  10 {
  11         __asm__("bswapq %0" : "=r" (x) : "0" (x));
  12         return x;
  13 }
  14
  15 static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
  16 {
  17         __asm__("bswapl %0" : "=r" (x) : "0" (x));
  18         return x;
  19 }
  20
  21 /* Do not define swab16.  Gcc is smart enough to recognize "C" version and
  22    convert it into rotation or exhange.  */
  23
  24 #define __arch__swab32(x) ___arch__swab32(x)
  25 #define __arch__swab64(x) ___arch__swab64(x)
  26
  27 #endif /* __GNUC__ */
  28
  29 #define __BYTEORDER_HAS_U64__
  30
  31 #include <linux/byteorder/little_endian.h>
  32
  33 #endif /* _X86_64_BYTEORDER_H */