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 __ashrdi3(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 = 1..1 or 0..0 */ |
22 | w.s.high = |
23 | uu.s.high >> 31; |
24 | w.s.low = uu.s.high >> -bm; |
25 | } else { |
26 | const unsigned int carries = (unsigned int) uu.s.high << bm; |
27 | |
28 | w.s.high = uu.s.high >> b; |
29 | w.s.low = ((unsigned int) uu.s.low >> b) | carries; |
30 | } |
31 | |
32 | return w.ll; |
33 | } |
34 | EXPORT_SYMBOL(__ashrdi3); |
35 |