File: /usr/src/linux/include/asm-cris/byteorder.h

1     /* $Id: byteorder.h,v 1.1 2000/07/10 16:32:31 bjornw Exp $ */
2     
3     #ifndef _CRIS_BYTEORDER_H
4     #define _CRIS_BYTEORDER_H
5     
6     #include <asm/types.h>
7     
8     #ifdef __GNUC__
9     
10     /* we just define these two (as we can do the swap in a single
11      * asm instruction in CRIS) and the arch-independent files will put
12      * them together into ntohl etc.
13      */
14     
15     static __inline__ __const__ __u32 ___arch__swab32(__u32 x)
16     {
17     	__asm__ ("swapwb %0" : "=r" (x) : "0" (x));
18       
19     	return(x);
20     }
21     
22     static __inline__ __const__ __u16 ___arch__swab16(__u16 x)
23     {
24     	__asm__ ("swapb %0" : "=r" (x) : "0" (x));
25     	
26     	return(x);
27     }
28     
29     /* defines are necessary because the other files detect the presence
30      * of a defined __arch_swab32, not an inline
31      */
32     
33     #define __arch__swab32(x) ___arch__swab32(x)
34     #define __arch__swab16(x) ___arch__swab16(x)
35     
36     #if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
37     #  define __BYTEORDER_HAS_U64__
38     #  define __SWAB_64_THRU_32__
39     #endif
40     
41     #endif /* __GNUC__ */
42     
43     #include <linux/byteorder/little_endian.h>
44     
45     #endif
46     
47     
48