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