This source file includes following definitions.
- __ntohl
- __ntohs
1 #ifndef _I386_BYTEORDER_H
2 #define _I386_BYTEORDER_H
3
4 #undef ntohl
5 #undef ntohs
6 #undef htonl
7 #undef htons
8
9 #ifndef __LITTLE_ENDIAN
10 #define __LITTLE_ENDIAN 1234
11 #endif
12
13 #ifndef __LITTLE_ENDIAN_BITFIELD
14 #define __LITTLE_ENDIAN_BITFIELD
15 #endif
16
17 extern unsigned long int ntohl(unsigned long int);
18 extern unsigned short int ntohs(unsigned short int);
19 extern unsigned long int htonl(unsigned long int);
20 extern unsigned short int htons(unsigned short int);
21
22 extern __inline__ unsigned long int __ntohl(unsigned long int);
23 extern __inline__ unsigned short int __ntohs(unsigned short int);
24 extern __inline__ unsigned long int __constant_ntohl(unsigned long int);
25 extern __inline__ unsigned short int __constant_ntohs(unsigned short int);
26
27 extern __inline__ unsigned long int
28 __ntohl(unsigned long int x)
29 {
30 #if defined(__KERNEL__) && !defined(CONFIG_M386)
31 __asm__("bswap %0" : "=r" (x) : "0" (x));
32 #else
33 __asm__("xchgb %b0,%h0\n\t"
34 "rorl $16,%0\n\t"
35 "xchgb %b0,%h0"
36 :"=q" (x)
37 : "0" (x));
38 #endif
39 return x;
40 }
41
42 #define __constant_ntohl(x) \
43 ((unsigned long int)((((unsigned long int)(x) & 0x000000ffU) << 24) | \
44 (((unsigned long int)(x) & 0x0000ff00U) << 8) | \
45 (((unsigned long int)(x) & 0x00ff0000U) >> 8) | \
46 (((unsigned long int)(x) & 0xff000000U) >> 24)))
47
48 extern __inline__ unsigned short int
49 __ntohs(unsigned short int x)
50 {
51 __asm__("xchgb %b0,%h0"
52 : "=q" (x)
53 : "0" (x));
54 return x;
55 }
56
57 #define __constant_ntohs(x) \
58 ((unsigned short int)((((unsigned short int)(x) & 0x00ff) << 8) | \
59 (((unsigned short int)(x) & 0xff00) >> 8))) \
60
61 #define __htonl(x) __ntohl(x)
62 #define __htons(x) __ntohs(x)
63 #define __constant_htonl(x) __constant_ntohl(x)
64 #define __constant_htons(x) __constant_ntohs(x)
65
66 #ifdef __OPTIMIZE__
67 # define ntohl(x) \
68 (__builtin_constant_p((long)(x)) ? \
69 __constant_ntohl((x)) : \
70 __ntohl((x)))
71 # define ntohs(x) \
72 (__builtin_constant_p((short)(x)) ? \
73 __constant_ntohs((x)) : \
74 __ntohs((x)))
75 # define htonl(x) \
76 (__builtin_constant_p((long)(x)) ? \
77 __constant_htonl((x)) : \
78 __htonl((x)))
79 # define htons(x) \
80 (__builtin_constant_p((short)(x)) ? \
81 __constant_htons((x)) : \
82 __htons((x)))
83 #endif
84
85 #endif