1#ifndef _I386_BYTEORDER_H 2#define _I386_BYTEORDER_H 3 4#include <asm/types.h> 5 6#ifdef __GNUC__ 7 8/* For avoiding bswap on i386 */ 9#ifdef __KERNEL__ 10#include <linux/config.h> 11#endif 12 13static __inline__ __const__ __u32 ___arch__swab32(__u32 x) 14{ 15#ifdef CONFIG_X86_BSWAP 16 __asm__("bswap %0" : "=r" (x) : "0" (x)); 17#else 18 __asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */ 19 "rorl $16,%0\n\t" /* swap words */ 20 "xchgb %b0,%h0" /* swap higher bytes */ 21 :"=q" (x) 22 : "0" (x)); 23#endif 24 return x; 25} 26 27static __inline__ __const__ __u16 ___arch__swab16(__u16 x) 28{ 29 __asm__("xchgb %b0,%h0" /* swap bytes */ \ 30 : "=q" (x) \ 31 : "0" (x)); \ 32 return x; 33} 34 35#define __arch__swab32(x) ___arch__swab32(x) 36#define __arch__swab16(x) ___arch__swab16(x) 37 38#if !defined(__STRICT_ANSI__) || defined(__KERNEL__) 39# define __BYTEORDER_HAS_U64__ 40# define __SWAB_64_THRU_32__ 41#endif 42 43#endif /* __GNUC__ */ 44 45#include <linux/byteorder/little_endian.h> 46 47#endif /* _I386_BYTEORDER_H */ 48