byteorder.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:1k
- /* $Id: byteorder.h,v 1.1 2000/07/10 16:32:31 bjornw Exp $ */
- #ifndef _CRIS_BYTEORDER_H
- #define _CRIS_BYTEORDER_H
- #include <asm/types.h>
- #ifdef __GNUC__
- /* we just define these two (as we can do the swap in a single
- * asm instruction in CRIS) and the arch-independent files will put
- * them together into ntohl etc.
- */
- static __inline__ __const__ __u32 ___arch__swab32(__u32 x)
- {
- __asm__ ("swapwb %0" : "=r" (x) : "0" (x));
-
- return(x);
- }
- static __inline__ __const__ __u16 ___arch__swab16(__u16 x)
- {
- __asm__ ("swapb %0" : "=r" (x) : "0" (x));
-
- return(x);
- }
- /* defines are necessary because the other files detect the presence
- * of a defined __arch_swab32, not an inline
- */
- #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