diff options
Diffstat (limited to 'sysdeps/i386/ffs.c')
| -rw-r--r-- | sysdeps/i386/ffs.c | 35 |
1 files changed, 18 insertions, 17 deletions
diff --git a/sysdeps/i386/ffs.c b/sysdeps/i386/ffs.c index 1e21585..411439d 100644 --- a/sysdeps/i386/ffs.c +++ b/sysdeps/i386/ffs.c @@ -1,24 +1,24 @@ /* ffs -- find first set bit in a word, counted from least significant end. For Intel 80x86, x>=3. - Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Copyright (C) 1991, 1992, 1993, 1994, 1997 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 Library General Public License as -published by the Free Software Foundation; either version 2 of the -License, or (at your option) any later version. + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 -Library General Public License for more details. + 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 + Library General Public License for more details. -You should have received a copy of the GNU Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the Free Software Foundation, Inc., 675 Mass Ave, -Cambridge, MA 02139, USA. */ + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ -#include <ansidecl.h> #include <string.h> #undef ffs @@ -26,16 +26,17 @@ Cambridge, MA 02139, USA. */ #ifdef __GNUC__ int -DEFUN(ffs, (x), int x) +ffs (x) + 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 nonzero\n" /* Jump if OK, i.e. X was non-zero. */ + "jz 1f\n" /* Jump if OK, i.e. X was non-zero. */ "leal 1(%1),%0\n" /* Return bsfl-result plus one on %0. */ - "nonzero:" : "=&a" (cnt), "=r" (tmp) : "rm" (x)); + "1:" : "=&a" (cnt), "=r" (tmp) : "rm" (x)); return cnt; } |