arch/openrisc/include/asm/bitops/ffs.h

   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 #ifdef CONFIG_OPENRISC_HAVE_INST_FF1
  16
  17 static inline int ffs(int x)
  18 {
  19         int ret;
  20
  21         __asm__ ("l.ff1 %0,%1"
  22                  : "=r" (ret)
  23                  : "r" (x));
  24
  25         return ret;
  26 }
  27
  28 #else
  29 #include <asm-generic/bitops/ffs.h>
  30 #endif
  31
  32 #endif /* __ASM_OPENRISC_FFS_H */