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- /*
- * libc/sysdeps/linux/v850/bits/byteswap.h -- Macros to swap the order
- * of bytes in integer values
- *
- * Copyright (C) 2001 NEC Corporation
- * Copyright (C) 2001 Miles Bader <miles@gnu.org>
- * Copyright (C) 1997,1998,2001 Free Software Foundation, Inc.
- *
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License. See the file COPYING.LIB in the main
- * directory of this archive for more details.
- */
- #if !defined _BYTESWAP_H && !defined _NETINET_IN_H
- # error "Never use <bits/byteswap.h> directly; include <byteswap.h> instead."
- #endif
- /* Swap bytes in 16 bit value. */
- #ifdef __GNUC__
- # define __bswap_16(x) \
- (__extension__ \
- ({ unsigned short int __bsh_val = (x); \
- __asm__ ("bsh %1, %0" : "=r" (__bsh_val) : "r" (__bsh_val)); \
- __bsh_val; }))
- #else
- static __inline unsigned short int
- __bswap_16 (unsigned short int __bsx)
- {
- return ((((__bsx) >> 8) & 0xff) | (((__bsx) & 0xff) << 8));
- }
- #endif
- /* Swap bytes in 32 bit value. */
- #ifdef __GNUC__
- # define __bswap_32(x) \
- (__extension__ \
- ({ unsigned short int __bsw_val = (x); \
- __asm__ ("bsw %1, %0" : "=r" (__bsw_val) : "r" (__bsw_val)); \
- __bsw_val; }))
- #else
- static __inline unsigned int
- __bswap_32 (unsigned int __bsx)
- {
- return ((((__bsx) & 0xff000000) >> 24) | (((__bsx) & 0x00ff0000) >> 8) |
- (((__bsx) & 0x0000ff00) << 8) | (((__bsx) & 0x000000ff) << 24));
- }
- #endif
- #if defined __GNUC__ && __GNUC__ >= 2
- /* Swap bytes in 64 bit value. */
- # define __bswap_64(x) \
- (__extension__ \
- ({ union { unsigned long long int __ll; \
- unsigned long int __l[2]; } __v, __r; \
- __v.__ll = (x); \
- __r.__l[0] = __bswap_32 (__v.__l[1]); \
- __r.__l[1] = __bswap_32 (__v.__l[0]); \
- __r.__ll; }))
- #endif
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