1/*
 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 <linux/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);