1 /*
   2  * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @bug 8026844
  27  * @summary Test repeating multiplyExact
  28  * @library /testlibrary /
  29  * @modules java.base/jdk.internal.misc
  30  *          java.management
  31  *
  32  * @run main compiler.intrinsics.mathexact.MulExactIRepeatTest
  33  */
  34 
  35 package compiler.intrinsics.mathexact;
  36 
  37 import jdk.test.lib.Utils;
  38 
  39 import java.util.Random;
  40 
  41 public class MulExactIRepeatTest {
  42     public static void main(String[] args) {
  43         runTest(new Verify.MulExactI());
  44     }
  45 
  46     public static int nonExact(int x, int y, Verify.BinaryMethod method) {
  47         int result = method.unchecked(x, y);
  48         result += method.unchecked(x, y);
  49         result += method.unchecked(x, y);
  50         result += method.unchecked(x, y);
  51         return result;
  52     }
  53 
  54     public static void runTest(Verify.BinaryMethod method) {
  55         Random rnd = Utils.getRandomInstance();
  56         for (int i = 0; i < 50000; ++i) {
  57             int x = Integer.MAX_VALUE - 10;
  58             int y = Integer.MAX_VALUE - 10 + rnd.nextInt(5);
  59 
  60             int c = rnd.nextInt() / 10;
  61             int d = rnd.nextInt(9);
  62 
  63             int a = catchingExact(x, y, method);
  64 
  65             if (a != 36) {
  66                 throw new RuntimeException("a != 36 : " + a);
  67             }
  68 
  69             int b = nonExact(c, d, method);
  70             int n = exact(c, d, method);
  71 
  72 
  73             if (n != b) {
  74                 throw new RuntimeException("n != b : " + n + " != " + b);
  75             }
  76         }
  77     }
  78 
  79     public static int exact(int x, int y, Verify.BinaryMethod method) {
  80         int result = 0;
  81         result += method.checkMethod(x, y);
  82         result += method.checkMethod(x, y);
  83         result += method.checkMethod(x, y);
  84         result += method.checkMethod(x, y);
  85         return result;
  86     }
  87 
  88     public static int catchingExact(int x, int y, Verify.BinaryMethod method) {
  89         int result = 0;
  90         try {
  91             result += 5;
  92             result = method.checkMethod(x, y);
  93         } catch (ArithmeticException e) {
  94             result += 1;
  95         }
  96         try {
  97             result += 6;
  98 
  99             result += method.checkMethod(x, y);
 100         } catch (ArithmeticException e) {
 101             result += 2;
 102         }
 103         try {
 104             result += 7;
 105             result += method.checkMethod(x, y);
 106         } catch (ArithmeticException e) {
 107             result += 3;
 108         }
 109         try {
 110             result += 8;
 111             result += method.checkMethod(x, y);
 112         } catch (ArithmeticException e) {
 113             result += 4;
 114         }
 115         return result;
 116     }
 117 }