1 files changed, 49 insertions, 0 deletions
diff --git a/libgcc/config/nds32/lib2csrc-mculib/_clzsi2.c b/libgcc/config/nds32/lib2csrc-mculib/_clzsi2.c
new file mode 100644
index 00000000000..9d0bdd96d80
--- /dev/null
+++ b/libgcc/config/nds32/lib2csrc-mculib/_clzsi2.c
@@ -0,0 +1,49 @@
+/* mculib libgcc routines of Andes NDS32 cpu for GNU compiler
+   Copyright (C) 2012-2013 Free Software Foundation, Inc.
+   Contributed by Andes Technology Corporation.
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify it
+   under the terms of the GNU General Public License as published
+   by the Free Software Foundation; either version 3, or (at your
+   option) any later version.
+
+   GCC 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 General Public
+   License for more details.
+
+   Under Section 7 of GPL version 3, you are granted additional
+   permissions described in the GCC Runtime Library Exception, version
+   3.1, as published by the Free Software Foundation.
+
+   You should have received a copy of the GNU General Public License and
+   a copy of the GCC Runtime Library Exception along with this program;
+   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+int
+__clzsi2 (int val)
+{
+  int i = 32;
+  int j = 16;
+  int temp;
+
+  for (; j; j >>= 1)
+    {
+      if (temp = val >> j)
+	{
+	  if (j == 1)
+	    {
+	      return (i - 2);
+	    }
+	  else
+	    {
+	      i -= j;
+	      val = temp;
+	    }
+	}
+    }
+  return (i - val);
+}