--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/compiler/6855215/Test6855215.java	Mon Aug 31 17:07:53 2009 -0700
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2009 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+/**
+ * @test
+ * @bug 6855215
+ * @summary Calculation error (NaN) after about 1500 calculations
+ *
+ * @run main/othervm -Xbatch -XX:UseSSE=0 Test6855215
+ */
+
+public class Test6855215 {
+    private double m;
+    private double b;
+
+    public static double log10(double x) {
+        return Math.log(x) / Math.log(10);
+    }
+
+    void calcMapping(double xmin, double xmax, double ymin, double ymax) {
+        m = (ymax - ymin) / (log10(xmax) - log10(xmin));
+        b = (log10(xmin) * ymax - log10(xmax) * ymin);
+    }
+
+    public static void main(String[] args) {
+        Test6855215 c = new Test6855215();
+        for (int i = 0; i < 30000; i++) {
+            c.calcMapping(91, 121, 177, 34);
+            if (c.m != c.m) {
+                throw new InternalError();
+            }
+        }
+    }
+}