1 files changed, 47 insertions, 0 deletions
diff --git a/ports/sysdeps/m68k/ffs.c b/ports/sysdeps/m68k/ffs.c
new file mode 100644
index 0000000000..3f45a03eaf
--- /dev/null
+++ b/ports/sysdeps/m68k/ffs.c
@@ -0,0 +1,47 @@
+/* ffs -- find first set bit in a word, counted from least significant end.
+   For mc68020, mc68030, mc68040.
+   This file is part of the GNU C Library.
+   Copyright (C) 1991, 1992, 1997, 1998, 2004, 2005 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
+
+#if	defined (__GNUC__) && defined (__mc68020__)
+
+int
+__ffs (x)
+     int x;
+{
+  int cnt;
+
+  asm ("bfffo %1{#0:#0},%0" : "=d" (cnt) : "dm" (x & -x));
+
+  return 32 - cnt;
+}
+weak_alias (__ffs, ffs)
+libc_hidden_builtin_def (ffs)
+#undef ffsl
+weak_alias (__ffs, ffsl)
+
+#else
+
+#include <string/ffs.c>
+
+#endif