arch/blackfin/include/asm/swab.h

   1 #ifndef _BLACKFIN_SWAB_H
   2 #define _BLACKFIN_SWAB_H
   3
   4 #include <linux/types.h>
   5 #include <asm-generic/swab.h>
   6
   7 #ifdef __GNUC__
   8
   9 static __inline__ __attribute_const__ __u32 __arch_swahb32(__u32 xx)
  10 {
  11         __u32 tmp;
  12         __asm__("%1 = %0 >> 8 (V);\n\t"
  13                 "%0 = %0 << 8 (V);\n\t"
  14                 "%0 = %0 | %1;\n\t"
  15                 : "+d"(xx), "=&d"(tmp));
  16         return xx;
  17 }
  18 #define __arch_swahb32 __arch_swahb32
  19
  20 static __inline__ __attribute_const__ __u32 __arch_swahw32(__u32 xx)
  21 {
  22         __u32 rv;
  23         __asm__("%0 = PACK(%1.L, %1.H);\n\t": "=d"(rv): "d"(xx));
  24         return rv;
  25 }
  26 #define __arch_swahw32 __arch_swahw32
  27
  28 static __inline__ __attribute_const__ __u32 __arch_swab32(__u32 xx)
  29 {
  30         return __arch_swahb32(__arch_swahw32(xx));
  31 }
  32 #define __arch_swab32 __arch_swab32
  33
  34 static __inline__ __attribute_const__ __u16 __arch_swab16(__u16 xx)
  35 {
  36         __u32 xw = xx;
  37         __asm__("%0 <<= 8;\n    %0.L = %0.L + %0.H (NS);\n": "+d"(xw));
  38         return (__u16)xw;
  39 }
  40 #define __arch_swab16 __arch_swab16
  41
  42 #endif /* __GNUC__ */
  43
  44 #endif                          /* _BLACKFIN_SWAB_H */