diff options
Diffstat (limited to 'arch/openrisc/include/asm/bitops/ffs.h')
| -rw-r--r-- | arch/openrisc/include/asm/bitops/ffs.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/openrisc/include/asm/bitops/ffs.h b/arch/openrisc/include/asm/bitops/ffs.h new file mode 100644 index 000000000000..9de46246ebc7 --- /dev/null +++ b/arch/openrisc/include/asm/bitops/ffs.h @@ -0,0 +1,32 @@ +/* + * OpenRISC Linux + * + * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __ASM_OPENRISC_FFS_H +#define __ASM_OPENRISC_FFS_H + +#ifdef CONFIG_OPENRISC_HAVE_INST_FF1 + +static inline int ffs(int x) +{ + int ret; + + __asm__ ("l.ff1 %0,%1" + : "=r" (ret) + : "r" (x)); + + return ret; +} + +#else +#include <asm-generic/bitops/ffs.h> +#endif + +#endif /* __ASM_OPENRISC_FFS_H */ |