1 /* 2 * OpenRISC Linux 3 * 4 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 */ 11 12 #ifndef __ASM_OPENRISC___FFS_H 13 #define __ASM_OPENRISC___FFS_H 14 15 16 #ifdef CONFIG_OPENRISC_HAVE_INST_FF1 17 18 static inline unsigned long __ffs(unsigned long x) 19 { 20 int ret; 21 22 __asm__ ("l.ff1 %0,%1" 23 : "=r" (ret) 24 : "r" (x)); 25 26 return ret-1; 27 } 28 29 #else 30 #include <asm-generic/bitops/__ffs.h> 31 #endif 32 33 #endif /* __ASM_OPENRISC___FFS_H */ 34