libc/sysdeps/linux/bfin/bits/byteswap.h

   1 /* File: libc/sysdeps/linux/bfin/bits/byteswap.h
   2  *
   3  * Copyright 2004-2006 Analog Devices Inc.
   4  *
   5  * Enter bugs at http://blackfin.uclinux.org/
   6  *
   7  * Licensed under the GPL-2 or later.
   8  */
   9
  10 #ifndef _ASM_BITS_BYTESWAP_H
  11 #define _ASM_BITS_BYTESWAP_H 1
  12
  13 #define __bswap_non_constant_16(x) \
  14      (__extension__                                                           \
  15       ({ register unsigned short int __v;                                     \
  16          __asm__ ("%0 = PACK (%1.L, %1.L);"                                   \
  17                   "%0 >>= 8;"                                                 \
  18                   : "=d" (__v)                                                \
  19                   : "d" (x));                                                 \
  20          __v; }))
  21
  22 #define __bswap_non_constant_32(x) \
  23      (__extension__                                                           \
  24       ({ register unsigned int __v;                                           \
  25          __asm__ ("%1 = %0 >> 8 (V);"                                         \
  26                   "%0 = %0 << 8 (V);"                                         \
  27                   "%0 = %0 | %1;"                                             \
  28                   "%1 = PACK(%0.L, %0.H);"                                    \
  29                   : "+d"(x), "=&d"(__v));                                     \
  30          __v; }))
  31
  32 #endif
  33
  34 #include <bits/byteswap-common.h>