Mercurial > hg > CbC > CbC_gcc
comparison libgcc/udivmodhi4.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 (2018-10-24) |
parents | |
children | 1830386684a0 |
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111:04ced10e8804 | 131:84e7813d76e9 |
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1 /* Copyright (C) 2000-2018 Free Software Foundation, Inc. | |
2 | |
3 This file is part of GCC. | |
4 | |
5 GCC is free software; you can redistribute it and/or modify it under | |
6 the terms of the GNU General Public License as published by the Free | |
7 Software Foundation; either version 3, or (at your option) any later | |
8 version. | |
9 | |
10 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
11 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 for more details. | |
14 | |
15 Under Section 7 of GPL version 3, you are granted additional | |
16 permissions described in the GCC Runtime Library Exception, version | |
17 3.1, as published by the Free Software Foundation. | |
18 | |
19 You should have received a copy of the GNU General Public License and | |
20 a copy of the GCC Runtime Library Exception along with this program; | |
21 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
22 <http://www.gnu.org/licenses/>. */ | |
23 | |
24 unsigned short | |
25 __udivmodhi4(unsigned short num, unsigned short den, int modwanted) | |
26 { | |
27 unsigned short bit = 1; | |
28 unsigned short res = 0; | |
29 | |
30 while (den < num && bit && !(den & (1L<<31))) | |
31 { | |
32 den <<=1; | |
33 bit <<=1; | |
34 } | |
35 while (bit) | |
36 { | |
37 if (num >= den) | |
38 { | |
39 num -= den; | |
40 res |= bit; | |
41 } | |
42 bit >>=1; | |
43 den >>=1; | |
44 } | |
45 if (modwanted) return num; | |
46 return res; | |
47 } |