blob: 1b6087db95a54b665262ec8ee142a3a323850578 [file] [log] [blame]
Palmer Dabbeltb35cd982017-05-23 10:28:26 -07001/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, see the file COPYING, or write
14 * to the Free Software Foundation, Inc.
15 */
16
17#include <linux/export.h>
18
19#include <lib/libgcc.h>
20
21long long notrace __ashldi3(long long u, word_type b)
22{
23 DWunion uu, w;
24 word_type bm;
25
26 if (b == 0)
27 return u;
28
29 uu.ll = u;
30 bm = 32 - b;
31
32 if (bm <= 0) {
33 w.s.low = 0;
34 w.s.high = (unsigned int) uu.s.low << -bm;
35 } else {
36 const unsigned int carries = (unsigned int) uu.s.low >> bm;
37
38 w.s.low = (unsigned int) uu.s.low << b;
39 w.s.high = ((unsigned int) uu.s.high << b) | carries;
40 }
41
42 return w.ll;
43}
44EXPORT_SYMBOL(__ashldi3);