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1 /* Copyright (C) 2000-2018 Free Software Foundation, Inc.
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2
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3 This file is part of GCC.
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4
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5 GCC is free software; you can redistribute it and/or modify it under
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6 the terms of the GNU General Public License as published by the Free
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7 Software Foundation; either version 3, or (at your option) any later
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8 version.
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9
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10 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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11 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 for more details.
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14
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15 Under Section 7 of GPL version 3, you are granted additional
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16 permissions described in the GCC Runtime Library Exception, version
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17 3.1, as published by the Free Software Foundation.
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18
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19 You should have received a copy of the GNU General Public License and
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20 a copy of the GCC Runtime Library Exception along with this program;
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21 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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22 <http://www.gnu.org/licenses/>. */
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23
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24 unsigned short
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25 __udivmodhi4(unsigned short num, unsigned short den, int modwanted)
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26 {
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27 unsigned short bit = 1;
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28 unsigned short res = 0;
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29
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30 while (den < num && bit && !(den & (1L<<31)))
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31 {
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32 den <<=1;
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33 bit <<=1;
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34 }
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35 while (bit)
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36 {
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37 if (num >= den)
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38 {
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39 num -= den;
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40 res |= bit;
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41 }
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42 bit >>=1;
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43 den >>=1;
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44 }
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45 if (modwanted) return num;
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46 return res;
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47 }
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