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9304f876 | 1 | /* mculib libgcc routines of Andes NDS32 cpu for GNU compiler |
a945c346 | 2 | Copyright (C) 2012-2024 Free Software Foundation, Inc. |
9304f876 CJW |
3 | Contributed by Andes Technology Corporation. |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU General Public License as published | |
9 | by the Free Software Foundation; either version 3, or (at your | |
10 | option) any later version. | |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but WITHOUT | |
13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
15 | License for more details. | |
16 | ||
17 | Under Section 7 of GPL version 3, you are granted additional | |
18 | permissions described in the GCC Runtime Library Exception, version | |
19 | 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | You should have received a copy of the GNU General Public License and | |
22 | a copy of the GCC Runtime Library Exception along with this program; | |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | <http://www.gnu.org/licenses/>. */ | |
25 | ||
26 | int | |
27 | __clzsi2 (int val) | |
28 | { | |
29 | int i = 32; | |
30 | int j = 16; | |
31 | int temp; | |
32 | ||
33 | for (; j; j >>= 1) | |
34 | { | |
35 | if (temp = val >> j) | |
36 | { | |
37 | if (j == 1) | |
38 | { | |
39 | return (i - 2); | |
40 | } | |
41 | else | |
42 | { | |
43 | i -= j; | |
44 | val = temp; | |
45 | } | |
46 | } | |
47 | } | |
48 | return (i - val); | |
49 | } |