21#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
22# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
25#ifndef _BITS_BYTESWAP_H
26#define _BITS_BYTESWAP_H 1
29#define __bswap_constant_16(x) \
30 ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
34# define __bswap_16(x) \
36 ({ register unsigned short int __v, __x = (x); \
37 if (__builtin_constant_p (__x)) \
38 __v = __bswap_constant_16 (__x); \
40 __asm__ ("rorw $8, %w0" \
47# define __bswap_16(x) \
49 ({ register unsigned short int __x = (x); __bswap_constant_16 (__x); }))
52static __inline
unsigned short int
60#define __bswap_constant_32(x) \
61 ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
62 (((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
68# if !defined __i486__ && !defined __pentium__ && !defined __pentiumpro__ \
69 && !defined __pentium4__
70# define __bswap_32(x) \
72 ({ register unsigned int __v, __x = (x); \
73 if (__builtin_constant_p (__x)) \
74 __v = __bswap_constant_32 (__x); \
76 __asm__ ("rorw $8, %w0;" \
84# define __bswap_32(x) \
86 ({ register unsigned int __v, __x = (x); \
87 if (__builtin_constant_p (__x)) \
88 __v = __bswap_constant_32 (__x); \
90 __asm__ ("bswap %0" : "=r" (__v) : "0" (__x)); \
94# define __bswap_32(x) \
96 ({ register unsigned int __x = (x); __bswap_constant_32 (__x); }))
99static __inline
unsigned int
107#if defined __GNUC__ && __GNUC__ >= 2
109#define __bswap_constant_64(x) \
110 ((((x) & 0xff00000000000000ull) >> 56) \
111 | (((x) & 0x00ff000000000000ull) >> 40) \
112 | (((x) & 0x0000ff0000000000ull) >> 24) \
113 | (((x) & 0x000000ff00000000ull) >> 8) \
114 | (((x) & 0x00000000ff000000ull) << 8) \
115 | (((x) & 0x0000000000ff0000ull) << 24) \
116 | (((x) & 0x000000000000ff00ull) << 40) \
117 | (((x) & 0x00000000000000ffull) << 56))
119# define __bswap_64(x) \
121 ({ union { __extension__ unsigned long long int __ll; \
122 unsigned long int __l[2]; } __w, __r; \
123 if (__builtin_constant_p (x)) \
124 __r.__ll = __bswap_constant_64 (x); \
128 __r.__l[0] = __bswap_32 (__w.__l[1]); \
129 __r.__l[1] = __bswap_32 (__w.__l[0]); \
static __inline unsigned short int __bswap_16(unsigned short int __bsx)
#define __bswap_constant_16(x)
#define __bswap_constant_32(x)
static __inline unsigned int __bswap_32(unsigned int __bsx)