/* ffs -- find first set bit in a word, counted from least significant end.

   For Intel 80x86, x>=3.

   This file is part of the GNU C Library.

   Copyright (C) 1991-2018 Free Software Foundation, Inc.

   Contributed by Torbjorn Granlund (tege@sics.se).

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#define ffsl __something_else

#include <string.h>

#undef	ffs

#ifdef	__GNUC__

int

__ffs (int x)

{

  int cnt;

  int tmp;

  asm ("xorl %0,%0\n"		/* Set CNT to zero.  */

       "bsfl %2,%1\n"		/* Count low bits in X and store in %1.  */

       "jz 1f\n"		/* Jump if OK, i.e. X was non-zero.  */

       "leal 1(%1),%0\n"	/* Return bsfl-result plus one on %0.  */

       "1:" : "=&a" (cnt), "=r" (tmp) : "rm" (x));

  return cnt;

}

weak_alias (__ffs, ffs)

libc_hidden_def (__ffs)

libc_hidden_builtin_def (ffs)

#undef ffsl

weak_alias (__ffs, ffsl)

#else

#include <string/ffs.c>

#endif