--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/compiler/intrinsics/mathexact/Verify.java	Fri Sep 27 08:39:19 2013 +0200
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2013, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+public class Verify {
+  public static String throwWord(boolean threw) {
+    return (threw ? "threw" : "didn't throw");
+  }
+
+  public static void verify(int a, int b) {
+    boolean exception1 = false, exception2 = false;
+    int result1 = 0, result2 = 0;
+    try {
+      result1 = testIntrinsic(a, b);
+    } catch (ArithmeticException e) {
+      exception1 = true;
+    }
+    try {
+      result2 = testNonIntrinsic(a, b);
+    } catch (ArithmeticException e) {
+      exception2 = true;
+    }
+
+    if (exception1 != exception2) {
+      throw new RuntimeException("Intrinsic version " + throwWord(exception1) + " exception, NonIntrinsic version " + throwWord(exception2) + " for: " + a + " + " + b);
+    }
+    if (result1 != result2) {
+      throw new RuntimeException("Intrinsic version returned: " + a + " while NonIntrinsic version returned: " + b);
+    }
+  }
+
+  public static int testIntrinsic(int a, int b) {
+    return java.lang.Math.addExact(a, b);
+  }
+
+  public static int testNonIntrinsic(int a, int b) {
+    return safeAddExact(a, b);
+  }
+
+  // Copied java.lang.Math.addExact to avoid intrinsification
+  public static int safeAddExact(int x, int y) {
+    int r = x + y;
+    // HD 2-12 Overflow iff both arguments have the opposite sign of the result
+    if (((x ^ r) & (y ^ r)) < 0) {
+      throw new ArithmeticException("integer overflow");
+    }
+    return r;
+  }
+}