1 files changed, 42 insertions, 0 deletions
diff --git a/sysdeps/rs6000/ffs.c b/sysdeps/rs6000/ffs.c
new file mode 100644
index 0000000000..4d01727044
--- /dev/null
+++ b/sysdeps/rs6000/ffs.c
@@ -0,0 +1,42 @@
+/* ffs -- find first set bit in a word, counted from least significant end.
+   For IBM rs6000.
+   Copyright (C) 1991, 1992, 1997, 2004 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <string.h>
+
+#undef	ffs
+
+#ifdef	__GNUC__
+
+int
+__ffs (x)
+     int x;
+{
+  int cnt;
+
+  asm ("cntlz %0,%1" : "=r" (cnt) : "r" (x & -x));
+  return 32 - cnt;
+}
+weak_alias (__ffs, ffs)
+libc_hidden_builtin_def (ffs)
+
+#else
+#include <sysdeps/generic/ffs.c>
+#endif