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

   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
  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 */