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77e0f75a | 1 | /* The implementation of __parityhi2. |
f1717362 | 2 | Copyright (C) 2003-2016 Free Software Foundation, Inc. |
77e0f75a | 3 | |
187b36cf | 4 | This file is part of GCC. |
77e0f75a | 5 | |
187b36cf | 6 | GCC is free software; you can redistribute it and/or modify |
77e0f75a | 7 | it under the terms of the GNU General Public License as published by |
6bc9506f | 8 | the Free Software Foundation; either version 3, or (at your option) |
77e0f75a | 9 | any later version. |
10 | ||
187b36cf | 11 | GCC is distributed in the hope that it will be useful, |
77e0f75a | 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
6bc9506f | 16 | Under Section 7 of GPL version 3, you are granted additional |
17 | permissions described in the GCC Runtime Library Exception, version | |
18 | 3.1, as published by the Free Software Foundation. | |
19 | ||
20 | You should have received a copy of the GNU General Public License and | |
21 | a copy of the GCC Runtime Library Exception along with this program; | |
22 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
23 | <http://www.gnu.org/licenses/>. */ | |
77e0f75a | 24 | |
83407f1b | 25 | int __parityhi2 (unsigned short x); |
26 | ||
77e0f75a | 27 | int |
28 | __parityhi2 (unsigned short x) | |
29 | { | |
30 | int i; | |
31 | int count = 0; | |
32 | for (i = 0; i < 16; i++) | |
33 | if (x & ((unsigned short) 1 << i)) | |
34 | count++; | |
35 | return count & 1; | |
36 | } |