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6bc9a396 CL |
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 | ||
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); |