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83ffe9cd | 1 | /* Copyright (C) 2012-2023 Free Software Foundation, Inc. |
e430824f CLT |
2 | Contributed by Altera and Mentor Graphics, Inc. |
3 | ||
4 | This file is free software; you can redistribute it and/or modify it | |
5 | under the terms of the GNU General Public License as published by the | |
6 | Free Software Foundation; either version 3, or (at your option) any | |
7 | later version. | |
8 | ||
9 | This file is distributed in the hope that it will be useful, but | |
10 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | General Public License for more details. | |
13 | ||
14 | Under Section 7 of GPL version 3, you are granted additional | |
15 | permissions described in the GCC Runtime Library Exception, version | |
16 | 3.1, as published by the Free Software Foundation. | |
17 | ||
18 | You should have received a copy of the GNU General Public License and | |
19 | a copy of the GCC Runtime Library Exception along with this program; | |
20 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
21 | <http://www.gnu.org/licenses/>. */ | |
22 | ||
23 | #include "lib2-nios2.h" | |
24 | ||
25 | /* 32-bit SI multiply for Nios II. */ | |
26 | ||
27 | SItype | |
28 | __mulsi3 (SItype a, SItype b) | |
29 | { | |
30 | SItype res = 0; | |
31 | USItype cnt = a; | |
32 | ||
33 | while (cnt) | |
34 | { | |
35 | if (cnt & 1) | |
36 | res += b; | |
37 | b <<= 1; | |
38 | cnt >>= 1; | |
39 | } | |
40 | ||
41 | return res; | |
42 | } |