root/include/asm-alpha/byteorder.h

/* */

INCLUDED FROM

DEFINITIONS

1. __ntohl
2. __ntohs

   1 #ifndef _ALPHA_BYTEORDER_H
   2 #define _ALPHA_BYTEORDER_H
   3 
   4 #undef ntohl
   5 #undef ntohs
   6 #undef htonl
   7 #undef htons
   8 
   9 #define LITTLE_ENDIAN
  10 #define LITTLE_ENDIAN_BITFIELD
  11 
  12 extern unsigned long int        ntohl(unsigned long int);
  13 extern unsigned short int       ntohs(unsigned short int);
  14 extern unsigned long int        htonl(unsigned long int);
  15 extern unsigned short int       htons(unsigned short int);
  16 
  17 extern unsigned long int        __ntohl(unsigned long int);
  18 extern unsigned short int       __ntohs(unsigned short int);
  19 extern unsigned long int        __constant_ntohl(unsigned long int);
  20 extern unsigned short int       __constant_ntohs(unsigned short int);
  21 
  22 /*
  23  * The constant and non-constant versions here are the same.
  24  * Maybe I'll come up with an alpha-optimized routine for the
  25  * non-constant ones (the constant ones don't need it: gcc
  26  * will optimize it to the correct constant)
  27  */
  28 
  29 extern __inline__ unsigned long int
  30 __ntohl(unsigned long int x)
     /*  */
  31 {
  32         return (((x & 0x000000ffU) << 24) |
  33                 ((x & 0x0000ff00U) <<  8) |
  34                 ((x & 0x00ff0000U) >>  8) |
  35                 ((x & 0xff000000U) >> 24));
  36 }
  37 
  38 #define __constant_ntohl(x) \
  39 ((unsigned int)((((unsigned int)(x) & 0x000000ffU) << 24) | \
  40                 (((unsigned int)(x) & 0x0000ff00U) <<  8) | \
  41                 (((unsigned int)(x) & 0x00ff0000U) >>  8) | \
  42                 (((unsigned int)(x) & 0xff000000U) >> 24)))
  43 
  44 extern __inline__ unsigned short int
  45 __ntohs(unsigned short int x)
     /*  */
  46 {
  47         return (((x & 0x00ff) << 8) |
  48                 ((x & 0xff00) >> 8));
  49 }
  50 
  51 #define __constant_ntohs(x) \
  52 ((unsigned short int)((((unsigned short int)(x) & 0x00ff) << 8) | \
  53                       (((unsigned short int)(x) & 0xff00) >> 8)))
  54 
  55 #define __htonl(x) __ntohl(x)
  56 #define __htons(x) __ntohs(x)
  57 #define __constant_htonl(x) __constant_ntohl(x)
  58 #define __constant_htons(x) __constant_ntohs(x)
  59 
  60 #ifdef  __OPTIMIZE__
  61 #  define ntohl(x) \
  62 (__builtin_constant_p((long)(x)) ? \
  63  __constant_ntohl((x)) : \
  64  __ntohl((x)))
  65 #  define ntohs(x) \
  66 (__builtin_constant_p((short)(x)) ? \
  67  __constant_ntohs((x)) : \
  68  __ntohs((x)))
  69 #  define htonl(x) \
  70 (__builtin_constant_p((long)(x)) ? \
  71  __constant_htonl((x)) : \
  72  __htonl((x)))
  73 #  define htons(x) \
  74 (__builtin_constant_p((short)(x)) ? \
  75  __constant_htons((x)) : \
  76  __htons((x)))
  77 #endif
  78 
  79 #endif

/* */