gcc/config/frv/cmovw.c

   1 /* Move word library function.
   2    Copyright (C) 2000 Free Software Foundation, Inc.
   3    Contributed by Red Hat, Inc.
   4
   5    This file is part of GNU CC.
   6
   7    GNU CC is free software ; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation * either version 2, or (at your option)
  10    any later version.
  11
  12    GNU CC is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY ; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GNU CC; see the file COPYING.  If not, write to
  19    the Free Software Foundation, 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 void
  23 __cmovw (int *dest, const int *src, unsigned len)
  24 {
  25   unsigned i;
  26   unsigned num = len >> 2;
  27   unsigned xlen = len & ~3;
  28   char *dest_byte = (char *)dest;
  29   const char *src_byte = (const char *)src;
  30
  31   if (dest_byte < src_byte || dest_byte > src_byte+len)
  32     {
  33       for (i = 0; i < num; i++)
  34         dest[i] = src[i];
  35
  36       while (len > xlen)
  37         {
  38           dest_byte[xlen] = src_byte[xlen];
  39           xlen++;
  40         }
  41     }
  42   else
  43     {
  44       while (len-- > 0)
  45         dest_byte[len] = src_byte[len];
  46     }
  47 }