--- a/gcc/config/stormy16/stormy16-lib2.c	Fri Feb 12 23:41:23 2010 +0900
+++ b/gcc/config/stormy16/stormy16-lib2.c	Mon May 24 12:47:05 2010 +0900
@@ -4,7 +4,7 @@
    files.  On this glorious day maybe this code can be integrated into
    it too.  */
 
-/* Copyright (C) 2005, 2008, 2009  Free Software Foundation, Inc.
+/* Copyright (C) 2005, 2008, 2009, 2010  Free Software Foundation, Inc.
 
    This file is part of GCC.
 
@@ -309,3 +309,26 @@
   return 16 - __builtin_clz (u & - u);
 }
 #endif
+
+#ifdef XSTORMY16_UCMPSI2
+/* Performs an unsigned comparison of two 32-bit values: A and B.
+   If A is less than B, then 0 is returned.  If A is greater than B,
+   then 2 is returned.  Otherwise A and B are equal and 1 is returned.  */
+
+word_type
+__ucmpsi2 (USItype a, USItype b)
+{
+  word_type hi_a = (a >> 16);
+  word_type hi_b = (b >> 16);
+
+  if (hi_a == hi_b)
+    {
+      word_type low_a = (a & 0xffff);
+      word_type low_b = (b & 0xffff);
+
+      return low_a < low_b ? 0 : (low_a > low_b ? 2 : 1);
+    }
+
+  return hi_a < hi_b ? 0 : 2;
+}
+#endif