linux-pinenote/arch/blackfin/include/asm/swab.h

#ifndef _BLACKFIN_SWAB_H
#define _BLACKFIN_SWAB_H

#include <linux/types.h>
#include <linux/compiler.h>

#if defined(__GNUC__) && !defined(__STRICT_ANSI__) || defined(__KERNEL__)
#  define __SWAB_64_THRU_32__
#endif

#ifdef __GNUC__

static __inline__ __attribute_const__ __u32 __arch_swahb32(__u32 xx)
{
	__u32 tmp;
	__asm__("%1 = %0 >> 8 (V);\n\t"
		"%0 = %0 << 8 (V);\n\t"
		"%0 = %0 | %1;\n\t"
		: "+d"(xx), "=&d"(tmp));
	return xx;
}
#define __arch_swahb32 __arch_swahb32

static __inline__ __attribute_const__ __u32 __arch_swahw32(__u32 xx)
{
	__u32 rv;
	__asm__("%0 = PACK(%1.L, %1.H);\n\t": "=d"(rv): "d"(xx));
	return rv;
}
#define __arch_swahw32 __arch_swahw32

static __inline__ __attribute_const__ __u32 __arch_swab32(__u32 xx)
{
	return __arch_swahb32(__arch_swahw32(xx));
}
#define __arch_swab32 __arch_swab32

static __inline__ __attribute_const__ __u16 __arch_swab16(__u16 xx)
{
	__u32 xw = xx;
	__asm__("%0 <<= 8;\n	%0.L = %0.L + %0.H (NS);\n": "+d"(xw));
	return (__u16)xw;
}
#define __arch_swab16 __arch_swab16

#endif /* __GNUC__ */

#endif				/* _BLACKFIN_SWAB_H */