1 | // SPDX-License-Identifier: GPL-2.0-or-later |
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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); |
33 |