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  • #ifndef _I386_BYTEORDER_H
    #define _I386_BYTEORDER_H
    
    #include <asm/types.h>
    
    #ifdef __GNUC__
    
    
    
    static __inline__ __u32 ___arch__swab32(__u32 x)
    
    {
    #ifdef CONFIG_X86_BSWAP
    	__asm__("bswap %0" : "=r" (x) : "0" (x));
    #else
    	__asm__("xchgb %b0,%h0\n\t"	/* swap lower bytes	*/
    		"rorl $16,%0\n\t"	/* swap words		*/
    		"xchgb %b0,%h0"		/* swap higher bytes	*/
    		:"=q" (x)
    		: "0" (x));
    #endif
    	return x;
    }
    
    
    static __inline__ __u16 ___arch__swab16(__u16 x)
    
    {
    	__asm__("xchgb %b0,%h0"		/* swap bytes		*/ \
    		: "=q" (x) \
    		:  "0" (x)); \
    		return x;
    }
    
    #define __arch__swab32(x) ___arch__swab32(x)
    #define __arch__swab16(x) ___arch__swab16(x)
    
    #if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
    #  define __BYTEORDER_HAS_U64__
    #  define __SWAB_64_THRU_32__
    #endif
    
    #endif /* __GNUC__ */
    
    #include <linux/byteorder/little_endian.h>
    
    #endif /* _I386_BYTEORDER_H */