LXR linux/arch/blackfin/include/uapi/asm/swab.h

   1/*
   2 * Copyright 2009 Analog Devices Inc.
   3 *
   4 * Licensed under the GPL-2 or later.
   5 */
   6
   7#ifndef _UAPI_BLACKFIN_SWAB_H
   8#define _UAPI_BLACKFIN_SWAB_H
   9
  10#include <linux/types.h>
  11#include <asm-generic/swab.h>
  12
  13#ifdef __GNUC__
  14
  15static __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
  26static __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
  34static __inline__ __attribute_const__ __u32 __arch_swab32(__u32 xx)
  35{
  36        return __arch_swahb32(__arch_swahw32(xx));
  37}
  38#define __arch_swab32 __arch_swab32
  39
  40static __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 /* _UAPI_BLACKFIN_SWAB_H */
  51