Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[platform/kernel/linux-starfive.git] / lib / ashldi3.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  */
4
5 #include <linux/export.h>
6
7 #include <linux/libgcc.h>
8
9 long long notrace __ashldi3(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.low = 0;
22                 w.s.high = (unsigned int) uu.s.low << -bm;
23         } else {
24                 const unsigned int carries = (unsigned int) uu.s.low >> bm;
25
26                 w.s.low = (unsigned int) uu.s.low << b;
27                 w.s.high = ((unsigned int) uu.s.high << b) | carries;
28         }
29
30         return w.ll;
31 }
32 EXPORT_SYMBOL(__ashldi3);