arch/avr32/include/asm/swab.h

   1 /*
   2  * AVR32 byteswapping functions.
   3  */
   4 #ifndef __ASM_AVR32_SWAB_H
   5 #define __ASM_AVR32_SWAB_H
   6
   7 #include <linux/types.h>
   8 #include <linux/compiler.h>
   9
  10 #define __SWAB_64_THRU_32__
  11
  12 #ifdef __CHECKER__
  13 extern unsigned long __builtin_bswap_32(unsigned long x);
  14 extern unsigned short __builtin_bswap_16(unsigned short x);
  15 #endif
  16
  17 /*
  18  * avr32-linux-gcc versions earlier than 4.2 improperly sign-extends
  19  * the result.
  20  */
  21 #if !(__GNUC__ == 4 && __GNUC_MINOR__ < 2)
  22 static inline __attribute_const__ __u16 __arch_swab16(__u16 val)
  23 {
  24         return __builtin_bswap_16(val);
  25 }
  26 #define __arch_swab16 __arch_swab16
  27
  28 static inline __attribute_const__ __u32 __arch_swab32(__u32 val)
  29 {
  30         return __builtin_bswap_32(val);
  31 }
  32 #define __arch_swab32 __arch_swab32
  33 #endif
  34
  35 #endif /* __ASM_AVR32_SWAB_H */