| 1 |
1325 |
phoenix |
/*
|
| 2 |
|
|
* libc/sysdeps/linux/v850/bits/byteswap.h -- Macros to swap the order
|
| 3 |
|
|
* of bytes in integer values
|
| 4 |
|
|
*
|
| 5 |
|
|
* Copyright (C) 2001 NEC Corporation
|
| 6 |
|
|
* Copyright (C) 2001 Miles Bader <miles@gnu.org>
|
| 7 |
|
|
* Copyright (C) 1997,1998,2001 Free Software Foundation, Inc.
|
| 8 |
|
|
*
|
| 9 |
|
|
* This file is subject to the terms and conditions of the GNU Lesser
|
| 10 |
|
|
* General Public License. See the file COPYING.LIB in the main
|
| 11 |
|
|
* directory of this archive for more details.
|
| 12 |
|
|
*/
|
| 13 |
|
|
|
| 14 |
|
|
#if !defined _BYTESWAP_H && !defined _NETINET_IN_H
|
| 15 |
|
|
# error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
|
| 16 |
|
|
#endif
|
| 17 |
|
|
|
| 18 |
|
|
/* Swap bytes in 16 bit value. */
|
| 19 |
|
|
#define __bswap_constant_16(x) \
|
| 20 |
|
|
((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
|
| 21 |
|
|
|
| 22 |
|
|
#ifdef __GNUC__
|
| 23 |
|
|
# define __bswap_16(x) \
|
| 24 |
|
|
(__extension__ \
|
| 25 |
|
|
({ unsigned long int __bswap_16_v; \
|
| 26 |
|
|
if (__builtin_constant_p (x)) \
|
| 27 |
|
|
__bswap_16_v = __bswap_constant_16 (x); \
|
| 28 |
|
|
else \
|
| 29 |
|
|
__asm__ ("bsh %1, %0" : "=r" (__bswap_16_v) : "r" (x)); \
|
| 30 |
|
|
__bswap_16_v; }))
|
| 31 |
|
|
#else
|
| 32 |
|
|
# define __bswap_16(x) __bswap_constant_16 (x)
|
| 33 |
|
|
#endif
|
| 34 |
|
|
|
| 35 |
|
|
/* Swap bytes in 32 bit value. */
|
| 36 |
|
|
#define __bswap_constant_32(x) \
|
| 37 |
|
|
((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >> 8) | \
|
| 38 |
|
|
(((x) & 0x0000ff00) << 8) | (((x) & 0x000000ff) << 24))
|
| 39 |
|
|
|
| 40 |
|
|
#ifdef __GNUC__
|
| 41 |
|
|
# define __bswap_32(x) \
|
| 42 |
|
|
(__extension__ \
|
| 43 |
|
|
({ unsigned long int __bswap_32_v; \
|
| 44 |
|
|
if (__builtin_constant_p (x)) \
|
| 45 |
|
|
__bswap_32_v = __bswap_constant_32 (x); \
|
| 46 |
|
|
else \
|
| 47 |
|
|
__asm__ ("bsw %1, %0" : "=r" (__bswap_32_v) : "r" (x)); \
|
| 48 |
|
|
__bswap_32_v; }))
|
| 49 |
|
|
#else
|
| 50 |
|
|
# define __bswap_32(x) __bswap_constant_32 (x)
|
| 51 |
|
|
#endif
|
| 52 |
|
|
|
| 53 |
|
|
#if defined __GNUC__ && __GNUC__ >= 2
|
| 54 |
|
|
/* Swap bytes in 64 bit value. */
|
| 55 |
|
|
# define __bswap_64(x) \
|
| 56 |
|
|
(__extension__ \
|
| 57 |
|
|
({ union { unsigned long long int __ll; \
|
| 58 |
|
|
unsigned long int __l[2]; } __bswap_64_v, __bswap_64_r; \
|
| 59 |
|
|
__bswap_64_v.__ll = (x); \
|
| 60 |
|
|
__bswap_64_r.__l[0] = __bswap_32 (__bswap_64_v.__l[1]); \
|
| 61 |
|
|
__bswap_64_r.__l[1] = __bswap_32 (__bswap_64_v.__l[0]); \
|
| 62 |
|
|
__bswap_64_r.__ll; }))
|
| 63 |
|
|
#endif
|
