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36a05131 | 1 | /* Move half-word library function. |
7adcbafe | 2 | Copyright (C) 2000-2022 Free Software Foundation, Inc. |
36a05131 BS |
3 | Contributed by Red Hat, Inc. |
4 | ||
7ec022b2 | 5 | This file is part of GCC. |
36a05131 | 6 | |
7ec022b2 | 7 | GCC is free software ; you can redistribute it and/or modify |
36a05131 | 8 | it under the terms of the GNU General Public License as published by |
748086b7 | 9 | the Free Software Foundation; either version 3, or (at your option) |
36a05131 BS |
10 | any later version. |
11 | ||
7ec022b2 | 12 | GCC is distributed in the hope that it will be useful, |
36a05131 BS |
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 | ||
748086b7 JJ |
17 | Under Section 7 of GPL version 3, you are granted additional |
18 | permissions described in the GCC Runtime Library Exception, version | |
19 | 3.1, as published by the Free Software Foundation. | |
36a05131 | 20 | |
748086b7 JJ |
21 | You should have received a copy of the GNU General Public License and |
22 | a copy of the GCC Runtime Library Exception along with this program; | |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | <http://www.gnu.org/licenses/>. */ | |
00051260 | 25 | |
36a05131 BS |
26 | void |
27 | __cmovh (short *dest, const short *src, unsigned len) | |
28 | { | |
29 | unsigned i; | |
30 | unsigned num = len >> 1; | |
31 | char *dest_byte = (char *)dest; | |
32 | const char *src_byte = (const char *)src; | |
33 | ||
34 | if (dest_byte < src_byte || dest_byte > src_byte+len) | |
35 | { | |
36 | for (i = 0; i < num; i++) | |
37 | dest[i] = src[i]; | |
38 | ||
39 | if ((len & 1) != 0) | |
40 | dest_byte[len-1] = src_byte[len-1]; | |
41 | } | |
42 | else | |
43 | { | |
44 | while (len-- > 0) | |
45 | dest_byte[len] = src_byte[len]; | |
46 | } | |
47 | } |