1/*
 2 * arch/score/lib/ashldi3.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
23long long __ashldi3(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.low = 0;
36		w.s.high = (unsigned int) uu.s.low << -bm;
37	} else {
38		const unsigned int carries = (unsigned int) uu.s.low >> bm;
39
40		w.s.low = (unsigned int) uu.s.low << b;
41		w.s.high = ((unsigned int) uu.s.high << b) | carries;
42	}
43
44	return w.ll;
45}
46EXPORT_SYMBOL(__ashldi3);