xref: /linux/arch/openrisc/include/asm/bitops/ffs.h (revision 75bf465f0bc33e9b776a46d6a1b9b990f5fb7c37) 
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 #ifdef CONFIG_OPENRISC_HAVE_INST_FF1
12 
ffs(int x)13 static inline int ffs(int x)
14 {
15 	int ret;
16 
17 	__asm__ ("l.ff1 %0,%1"
18 		 : "=r" (ret)
19 		 : "r" (x));
20 
21 	return ret;
22 }
23 
24 #else
25 #include <asm-generic/bitops/ffs.h>
26 #endif
27 
28 #endif /* __ASM_OPENRISC_FFS_H */
29