text: /*
   * 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.  */
  #define __bswap_constant_16(x) \
    ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
  
  #ifdef __GNUC__
  # define __bswap_16(x)							      \
      (__extension__							      \
       ({ unsigned long int __bswap_16_v;					      \
          if (__builtin_constant_p (x))					      \
            __bswap_16_v = __bswap_constant_16 (x);			      \
          else								      \
  	  __asm__ ("bsh %1, %0" : "=r" (__bswap_16_v) : "r" (x));	      \
  	__bswap_16_v; }))
  #else
  # define __bswap_16(x) __bswap_constant_16 (x)
  #endif
  
  /* Swap bytes in 32 bit value.  */
  #define __bswap_constant_32(x) \
    ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >>  8) | \
     (((x) & 0x0000ff00) <<  8) | (((x) & 0x000000ff) << 24))
  
  #ifdef __GNUC__
  # define __bswap_32(x)							      \
      (__extension__							      \
       ({ unsigned long int __bswap_32_v;					      \
          if (__builtin_constant_p (x))					      \
            __bswap_32_v = __bswap_constant_32 (x);			      \
          else								      \
  	  __asm__ ("bsw %1, %0" : "=r" (__bswap_32_v) : "r" (x));	      \
  	__bswap_32_v; }))
  #else
  # define __bswap_32(x) __bswap_constant_32 (x)
  #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]; } __bswap_64_v, __bswap_64_r;      \
  	 __bswap_64_v.__ll = (x);					      \
  	 __bswap_64_r.__l[0] = __bswap_32 (__bswap_64_v.__l[1]);	      \
  	 __bswap_64_r.__l[1] = __bswap_32 (__bswap_64_v.__l[0]);	      \
  	 __bswap_64_r.__ll; }))
  #endif
  