LXR linux/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
  13static 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