root/include/asm-ppc/byteorder.h

/* */

INCLUDED FROM

DEFINITIONS

1. __ntohl
2. __constant_ntohl
3. __ntohs
4. __constant_ntohs

   1 #ifndef _PPC_BYTEORDER_H
   2 #define _PPC_BYTEORDER_H
   3 
   4 #ifndef __BIG_ENDIAN
   5 #define __BIG_ENDIAN
   6 #endif
   7 
   8 #ifndef __BIG_ENDIAN_BITFIELD
   9 #define __BIG_ENDIAN_BITFIELD
  10 #endif
  11 
  12 #if 0 /* Assume PowerPC is Big-Endian! */
  13 #undef ntohl
  14 #undef ntohs
  15 #undef htonl
  16 #undef htons
  17 
  18 extern unsigned long int        ntohl(unsigned long int);
  19 extern unsigned short int       ntohs(unsigned short int);
  20 extern unsigned long int        htonl(unsigned long int);
  21 extern unsigned short int       htons(unsigned short int);
  22 
  23 extern unsigned long int        __ntohl(unsigned long int);
  24 extern unsigned short int       __ntohs(unsigned short int);
  25 extern unsigned long int        __constant_ntohl(unsigned long int);
  26 extern unsigned short int       __constant_ntohs(unsigned short int);
  27 
  28 extern __inline__ unsigned long int
  29 __ntohl(unsigned long int x)
     /*  */
  30 {
  31         return (((x & 0x000000ffU) << 24) |
  32                 ((x & 0x0000ff00U) <<  8) |
  33                 ((x & 0x00ff0000U) >>  8) |
  34                 ((x & 0xff000000U) >> 24));
  35 }
  36 
  37 extern __inline__ unsigned long int
  38 __constant_ntohl(unsigned long int x)
     /*  */
  39 {
  40         return (((x & 0x000000ffU) << 24) |
  41                 ((x & 0x0000ff00U) <<  8) |
  42                 ((x & 0x00ff0000U) >>  8) |
  43                 ((x & 0xff000000U) >> 24));
  44 }
  45 
  46 extern __inline__ unsigned short int
  47 __ntohs(unsigned short int x)
     /*  */
  48 {
  49         return (((x & 0x00ff) << 8) |
  50                 ((x & 0xff00) >> 8));
  51 }
  52 
  53 extern __inline__ unsigned short int
  54 __constant_ntohs(unsigned short int x)
     /*  */
  55 {
  56         return (((x & 0x00ff) << 8) |
  57                 ((x & 0xff00) >> 8));
  58 }
  59 
  60 #define __htonl(x) __ntohl(x)
  61 #define __htons(x) __ntohs(x)
  62 #define __constant_htonl(x) __constant_ntohl(x)
  63 #define __constant_htons(x) __constant_ntohs(x)
  64 
  65 #ifdef  __OPTIMIZE__
  66 #  define ntohl(x) \
  67 (__builtin_constant_p((long)(x)) ? \
  68  __constant_ntohl((x)) : \
  69  __ntohl((x)))
  70 #  define ntohs(x) \
  71 (__builtin_constant_p((short)(x)) ? \
  72  __constant_ntohs((x)) : \
  73  __ntohs((x)))
  74 #  define htonl(x) \
  75 (__builtin_constant_p((long)(x)) ? \
  76  __constant_htonl((x)) : \
  77  __htonl((x)))
  78 #  define htons(x) \
  79 (__builtin_constant_p((short)(x)) ? \
  80  __constant_htons((x)) : \
  81  __htons((x)))
  82 #endif
  83 
  84 #else
  85 
  86 #define ntohl(x) (x)
  87 #define ntohs(x) (x)
  88 #define htonl(x) (x)
  89 #define htons(x) (x)
  90 
  91 #endif
  92 
  93 #endif /* !(_PPC_BYTEORDER_H) */

/* */