1 /*
2 * arch/score/lib/ashrdi3.c
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see the file COPYING, or write
16 * to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20 #include <linux/module.h>
21 #include "libgcc.h"
22
__ashrdi3(long long u,word_type b)23 long long __ashrdi3(long long u, word_type b)
24 {
25 DWunion uu, w;
26 word_type bm;
27
28 if (b == 0)
29 return u;
30
31 uu.ll = u;
32 bm = 32 - b;
33
34 if (bm <= 0) {
35 /* w.s.high = 1..1 or 0..0 */
36 w.s.high =
37 uu.s.high >> 31;
38 w.s.low = uu.s.high >> -bm;
39 } else {
40 const unsigned int carries = (unsigned int) uu.s.high << bm;
41
42 w.s.high = uu.s.high >> b;
43 w.s.low = ((unsigned int) uu.s.low >> b) | carries;
44 }
45
46 return w.ll;
47 }
48 EXPORT_SYMBOL(__ashrdi3);
49