--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/compiler/7177917/Test7177917.java	Mon Jul 02 09:58:06 2012 +0200
@@ -0,0 +1,142 @@
+/*
+ * Copyright (c) 2012, 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.
+ *
+ */
+
+/*
+ * Micro-benchmark for Math.pow() and Math.exp()
+ */
+
+import java.util.*;
+
+public class Test7177917 {
+
+  static double d;
+
+  static Random r = new Random(0);
+
+  static long  m_pow(double[][] values) {
+    double res = 0;
+    long start = System.nanoTime();
+    for (int i = 0; i < values.length; i++) {
+      res += Math.pow(values[i][0], values[i][1]);
+    }
+    long stop = System.nanoTime();
+    d = res;
+    return (stop - start) / 1000;
+  }
+
+  static long  m_exp(double[] values) {
+    double res = 0;
+    long start = System.nanoTime();
+    for (int i = 0; i < values.length; i++) {
+      res += Math.exp(values[i]);
+    }
+    long stop = System.nanoTime();
+    d = res;
+    return (stop - start) / 1000;
+  }
+
+  static double[][] pow_values(int nb) {
+    double[][] res = new double[nb][2];
+    for (int i = 0; i < nb; i++) {
+      double ylogx = (1 + (r.nextDouble() * 2045)) - 1023; // 2045 rather than 2046 as a safety margin
+      double x = Math.abs(Double.longBitsToDouble(r.nextLong()));
+      while (x != x) {
+        x = Math.abs(Double.longBitsToDouble(r.nextLong()));
+      }
+      double logx = Math.log(x) / Math.log(2);
+      double y = ylogx / logx;
+
+      res[i][0] = x;
+      res[i][1] = y;
+    }
+    return res;
+  }
+
+  static double[] exp_values(int nb) {
+    double[] res = new double[nb];
+    for (int i = 0; i < nb; i++) {
+      double ylogx = (1 + (r.nextDouble() * 2045)) - 1023; // 2045 rather than 2046 as a safety margin
+      double x = Math.E;
+      double logx = Math.log(x) / Math.log(2);
+      double y = ylogx / logx;
+      res[i] = y;
+    }
+    return res;
+  }
+
+  static public void main(String[] args) {
+    {
+      // warmup
+      double[][] warmup_values = pow_values(10);
+      m_pow(warmup_values);
+
+      for (int i = 0; i < 20000; i++) {
+        m_pow(warmup_values);
+      }
+      // test pow perf
+      double[][] values = pow_values(1000000);
+      System.out.println("==> POW " + m_pow(values));
+
+      // force uncommon trap
+      double[][] nan_values = new double[1][2];
+      nan_values[0][0] = Double.NaN;
+      nan_values[0][1] = Double.NaN;
+      m_pow(nan_values);
+
+      // force recompilation
+      for (int i = 0; i < 20000; i++) {
+        m_pow(warmup_values);
+      }
+
+      // test pow perf again
+      System.out.println("==> POW " + m_pow(values));
+    }
+    {
+      // warmup
+      double[] warmup_values = exp_values(10);
+      m_exp(warmup_values);
+
+      for (int i = 0; i < 20000; i++) {
+        m_exp(warmup_values);
+      }
+
+      // test pow perf
+      double[] values = exp_values(1000000);
+      System.out.println("==> EXP " + m_exp(values));
+
+      // force uncommon trap
+      double[] nan_values = new double[1];
+      nan_values[0] = Double.NaN;
+      m_exp(nan_values);
+
+      // force recompilation
+      for (int i = 0; i < 20000; i++) {
+        m_exp(warmup_values);
+      }
+
+      // test pow perf again
+      System.out.println("==> EXP " + m_exp(values));
+    }
+  }
+}