1 /*
   2  * Copyright (c) 2012, 2013, 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 8005419
  27  * @summary Improve intrinsics code performance on x86 by using AVX2
  28  * @run main/othervm -Xbatch -Xmx64m Test8005419
  29  *
  30  */
  31 
  32 public class Test8005419 {
  33     public static int SIZE = 64;
  34 
  35     public static void main(String[] args) {
  36         char[] a = new char[SIZE];
  37         char[] b = new char[SIZE];
  38 
  39         for (int i = 16; i < SIZE; i++) {
  40           a[i] = (char)i;
  41           b[i] = (char)i;
  42         }
  43         String s1 = new String(a);
  44         String s2 = new String(b);
  45 
  46         // Warm up
  47         boolean failed = false;
  48         int result = 0;
  49         for (int i = 0; i < 10000; i++) {
  50           result += test(s1, s2);
  51         }
  52         for (int i = 0; i < 10000; i++) {
  53           result += test(s1, s2);
  54         }
  55         for (int i = 0; i < 10000; i++) {
  56           result += test(s1, s2);
  57         }
  58         if (result != 0) failed = true;
  59 
  60         System.out.println("Start testing");
  61         // Compare same string
  62         result = test(s1, s1);
  63         if (result != 0) {
  64           failed = true;
  65           System.out.println("Failed same: result = " + result + ", expected 0");
  66         }
  67         // Compare equal strings
  68         for (int i = 1; i <= SIZE; i++) {
  69           s1 = new String(a, 0, i);
  70           s2 = new String(b, 0, i);
  71           result = test(s1, s2);
  72           if (result != 0) {
  73             failed = true;
  74             System.out.println("Failed equals s1[" + i + "], s2[" + i + "]: result = " + result + ", expected 0");
  75           }
  76         }
  77         // Compare equal strings but different sizes
  78         for (int i = 1; i <= SIZE; i++) {
  79           s1 = new String(a, 0, i);
  80           for (int j = 1; j <= SIZE; j++) {
  81             s2 = new String(b, 0, j);
  82             result = test(s1, s2);
  83             if (result != (i-j)) {
  84               failed = true;
  85               System.out.println("Failed diff size s1[" + i + "], s2[" + j + "]: result = " + result + ", expected " + (i-j));
  86             }
  87           }
  88         }
  89         // Compare strings with one char different and different sizes
  90         for (int i = 1; i <= SIZE; i++) {
  91           s1 = new String(a, 0, i);
  92           for (int j = 0; j < i; j++) {
  93             b[j] -= 3; // change char
  94             s2 = new String(b, 0, i);
  95             result = test(s1, s2);
  96             int chdiff = a[j] - b[j];
  97             if (result != chdiff) {
  98               failed = true;
  99               System.out.println("Failed diff char s1[" + i + "], s2[" + i + "]: result = " + result + ", expected " + chdiff);
 100             }
 101             result = test(s2, s1);
 102             chdiff = b[j] - a[j];
 103             if (result != chdiff) {
 104               failed = true;
 105               System.out.println("Failed diff char s2[" + i + "], s1[" + i + "]: result = " + result + ", expected " + chdiff);
 106             }
 107             b[j] += 3; // restore
 108           }
 109         }
 110         if (failed) {
 111           System.out.println("FAILED");
 112           System.exit(97);
 113         }
 114         System.out.println("PASSED");
 115     }
 116 
 117     private static int test(String str1, String str2) {
 118         return str1.compareTo(str2);
 119     }
 120 }