arch/blackfin/include/asm/swab.h

   1 /*
   2  * Copyright 2009 Analog Devices Inc.
   3  *
   4  * Licensed under the GPL-2 or later.
   5  */
   6
   7 #ifndef _BLACKFIN_SWAB_H
   8 #define _BLACKFIN_SWAB_H
   9
  10 #include <linux/types.h>
  11 #include <asm-generic/swab.h>
  12
  13 #ifdef __GNUC__
  14
  15 static __inline__ __attribute_const__ __u32 __arch_swahb32(__u32 xx)
  16 {
  17         __u32 tmp;
  18         __asm__("%1 = %0 >> 8 (V);\n\t"
  19                 "%0 = %0 << 8 (V);\n\t"
  20                 "%0 = %0 | %1;\n\t"
  21                 : "+d"(xx), "=&d"(tmp));
  22         return xx;
  23 }
  24 #define __arch_swahb32 __arch_swahb32
  25
  26 static __inline__ __attribute_const__ __u32 __arch_swahw32(__u32 xx)
  27 {
  28         __u32 rv;
  29         __asm__("%0 = PACK(%1.L, %1.H);\n\t": "=d"(rv): "d"(xx));
  30         return rv;
  31 }
  32 #define __arch_swahw32 __arch_swahw32
  33
  34 static __inline__ __attribute_const__ __u32 __arch_swab32(__u32 xx)
  35 {
  36         return __arch_swahb32(__arch_swahw32(xx));
  37 }
  38 #define __arch_swab32 __arch_swab32
  39
  40 static __inline__ __attribute_const__ __u16 __arch_swab16(__u16 xx)
  41 {
  42         __u32 xw = xx;
  43         __asm__("%0 <<= 8;\n    %0.L = %0.L + %0.H (NS);\n": "+d"(xw));
  44         return (__u16)xw;
  45 }
  46 #define __arch_swab16 __arch_swab16
  47
  48 #endif /* __GNUC__ */
  49
  50 #endif                          /* _BLACKFIN_SWAB_H */