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1 /* Move word library function.
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2 Copyright (C) 2000, 2003, 2009 Free Software Foundation, Inc.
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3 Contributed by Red Hat, Inc.
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4
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5 This file is part of GCC.
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6
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7 GCC is free software ; you can redistribute it and/or modify
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8 it under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 3, or (at your option)
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10 any later version.
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11
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12 GCC is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY ; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 Under Section 7 of GPL version 3, you are granted additional
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18 permissions described in the GCC Runtime Library Exception, version
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19 3.1, as published by the Free Software Foundation.
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20
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21 You should have received a copy of the GNU General Public License and
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22 a copy of the GCC Runtime Library Exception along with this program;
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23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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24 <http://www.gnu.org/licenses/>. */
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25
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26 void
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27 __cmovw (int *dest, const int *src, unsigned len)
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28 {
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29 unsigned i;
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30 unsigned num = len >> 2;
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31 unsigned xlen = len & ~3;
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32 char *dest_byte = (char *)dest;
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33 const char *src_byte = (const char *)src;
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34
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35 if (dest_byte < src_byte || dest_byte > src_byte+len)
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36 {
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37 for (i = 0; i < num; i++)
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38 dest[i] = src[i];
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39
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40 while (len > xlen)
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41 {
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42 dest_byte[xlen] = src_byte[xlen];
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43 xlen++;
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44 }
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45 }
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46 else
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47 {
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48 while (len-- > 0)
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49 dest_byte[len] = src_byte[len];
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50 }
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51 }
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