1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * OpenRISC Linux
4 *
5 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
6 */
7
8 #ifndef __ASM_OPENRISC___FFS_H
9 #define __ASM_OPENRISC___FFS_H
10
11
12 #ifdef CONFIG_OPENRISC_HAVE_INST_FF1
13
14 static inline unsigned long __ffs(unsigned long x)
15 {
16 int ret;
17
18 __asm__ ("l.ff1 %0,%1"
19 : "=r" (ret)
20 : "r" (x));
21
22 return ret-1;
23 }
24
25 #else
26 #include <asm-generic/bitops/__ffs.h>
27 #endif
28
29 #endif /* __ASM_OPENRISC___FFS_H */
30
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