1 #ifndef _ASM_X86_BYTEORDER_H
2 #define _ASM_X86_BYTEORDER_H
10 static __inline__ __u32 ___arch__swab32(__u32 x)
12 #ifdef CONFIG_X86_BSWAP
13 __asm__("bswap %0" : "=r" (x) : "0" (x));
15 __asm__("xchgb %b0,%h0\n\t" /* swap lower bytes */
16 "rorl $16,%0\n\t" /* swap words */
17 "xchgb %b0,%h0" /* swap higher bytes */
24 static __inline__ __u64 ___arch__swab64(__u64 val)
27 struct { __u32 a,b; } s;
31 #ifdef CONFIG_X86_BSWAP
32 __asm__("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
33 : "=r" (v.s.a), "=r" (v.s.b)
34 : "0" (v.s.a), "1" (v.s.b));
36 v.s.a = ___arch__swab32(v.s.a);
37 v.s.b = ___arch__swab32(v.s.b);
38 __asm__("xchgl %0,%1" : "=r" (v.s.a), "=r" (v.s.b) : "0" (v.s.a), "1" (v.s.b));
45 static __inline__ __u64 ___arch__swab64(__u64 x)
47 __asm__("bswapq %0" : "=r" (x) : "0" (x));
51 static __inline__ __u32 ___arch__swab32(__u32 x)
53 __asm__("bswapl %0" : "=r" (x) : "0" (x));
59 /* Do not define swab16. Gcc is smart enough to recognize "C" version and
60 convert it into rotation or exhange. */
62 #define __arch__swab64(x) ___arch__swab64(x)
63 #define __arch__swab32(x) ___arch__swab32(x)
65 #define __BYTEORDER_HAS_U64__
69 #include <linux/byteorder/little_endian.h>
71 #endif /* _ASM_X86_BYTEORDER_H */