arch/blackfin/include/asm/swab.h

   1 #ifndef _BLACKFIN_SWAB_H
   2 #define _BLACKFIN_SWAB_H
   3
   4 #include <linux/types.h>
   5 #include <linux/compiler.h>
   6
   7 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) || defined(__KERNEL__)
   8 #  define __SWAB_64_THRU_32__
   9 #endif
  10
  11 #ifdef __GNUC__
  12
  13 static __inline__ __attribute_const__ __u32 __arch_swahb32(__u32 xx)
  14 {
  15         __u32 tmp;
  16         __asm__("%1 = %0 >> 8 (V);\n\t"
  17                 "%0 = %0 << 8 (V);\n\t"
  18                 "%0 = %0 | %1;\n\t"
  19                 : "+d"(xx), "=&d"(tmp));
  20         return xx;
  21 }
  22 #define __arch_swahb32 __arch_swahb32
  23
  24 static __inline__ __attribute_const__ __u32 __arch_swahw32(__u32 xx)
  25 {
  26         __u32 rv;
  27         __asm__("%0 = PACK(%1.L, %1.H);\n\t": "=d"(rv): "d"(xx));
  28         return rv;
  29 }
  30 #define __arch_swahw32 __arch_swahw32
  31
  32 static __inline__ __attribute_const__ __u32 __arch_swab32(__u32 xx)
  33 {
  34         return __arch_swahb32(__arch_swahw32(xx));
  35 }
  36 #define __arch_swab32 __arch_swab32
  37
  38 static __inline__ __attribute_const__ __u16 __arch_swab16(__u16 xx)
  39 {
  40         __u32 xw = xx;
  41         __asm__("%0 <<= 8;\n    %0.L = %0.L + %0.H (NS);\n": "+d"(xw));
  42         return (__u16)xw;
  43 }
  44 #define __arch_swab16 __arch_swab16
  45
  46 #endif /* __GNUC__ */
  47
  48 #endif                          /* _BLACKFIN_SWAB_H */