1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * lib/lshrdi3.c
4 */
5
6 #include <linux/module.h>
7 #include <linux/libgcc.h>
8
9 long long notrace __lshrdi3(long long u, word_type b)
10 {
11 DWunion uu, w;
12 word_type bm;
13
14 if (b == 0)
15 return u;
16
17 uu.ll = u;
18 bm = 32 - b;
19
20 if (bm <= 0) {
21 w.s.high = 0;
22 w.s.low = (unsigned int) uu.s.high >> -bm;
23 } else {
24 const unsigned int carries = (unsigned int) uu.s.high << bm;
25
26 w.s.high = (unsigned int) uu.s.high >> b;
27 w.s.low = ((unsigned int) uu.s.low >> b) | carries;
28 }
29
30 return w.ll;
31 }
32 EXPORT_SYMBOL(__lshrdi3);
33
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