diff options
Diffstat (limited to 'sysdeps/i960/ffs.c')
-rw-r--r-- | sysdeps/i960/ffs.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/sysdeps/i960/ffs.c b/sysdeps/i960/ffs.c new file mode 100644 index 0000000000..62b8742da7 --- /dev/null +++ b/sysdeps/i960/ffs.c @@ -0,0 +1,43 @@ +/* ffs -- find first set bit in a word, counted from least significant end. + For i960 Core architecture + Copyright (C) 1994 Free Software Foundation, Inc. + Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil), + On-Line Applications Research Corporation. + +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. + +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. */ + +#include <ansidecl.h> +#include <string.h> + +#undef ffs + +#if defined (__GNUC__) && defined (__i960__) + +int +DEFUN(ffs, (x), int x) +{ + int cnt; + + asm("scanbit %1,%0" : "=d" (cnt) : "rm" (x & -x)); + + return cnt; +} + +#else + +#include <sysdeps/generic/ffs.c> + +#endif |