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  *
  29  * @run main/othervm -Xbatch -Xmx64m compiler.intrinsics.Test8005419
  30  */
  31 
  32 package compiler.intrinsics;
  33 
  34 public class Test8005419 {
  35     public static int SIZE = 64;
  36 
  37     public static void main(String[] args) {
  38         char[] a = new char[SIZE];
  39         char[] b = new char[SIZE];
  40 
  41         for (int i = 16; i < SIZE; i++) {
  42           a[i] = (char)i;
  43           b[i] = (char)i;
  44         }
  45         String s1 = new String(a);
  46         String s2 = new String(b);
  47 
  48         // Warm up
  49         boolean failed = false;
  50         int result = 0;
  51         for (int i = 0; i < 10000; i++) {
  52           result += test(s1, s2);
  53         }
  54         for (int i = 0; i < 10000; i++) {
  55           result += test(s1, s2);
  56         }
  57         for (int i = 0; i < 10000; i++) {
  58           result += test(s1, s2);
  59         }
  60         if (result != 0) failed = true;
  61 
  62         System.out.println("Start testing");
  63         // Compare same string
  64         result = test(s1, s1);
  65         if (result != 0) {
  66           failed = true;
  67           System.out.println("Failed same: result = " + result + ", expected 0");
  68         }
  69         // Compare equal strings
  70         for (int i = 1; i <= SIZE; i++) {
  71           s1 = new String(a, 0, i);
  72           s2 = new String(b, 0, i);
  73           result = test(s1, s2);
  74           if (result != 0) {
  75             failed = true;
  76             System.out.println("Failed equals s1[" + i + "], s2[" + i + "]: result = " + result + ", expected 0");
  77           }
  78         }
  79         // Compare equal strings but different sizes
  80         for (int i = 1; i <= SIZE; i++) {
  81           s1 = new String(a, 0, i);
  82           for (int j = 1; j <= SIZE; j++) {
  83             s2 = new String(b, 0, j);
  84             result = test(s1, s2);
  85             if (result != (i-j)) {
  86               failed = true;
  87               System.out.println("Failed diff size s1[" + i + "], s2[" + j + "]: result = " + result + ", expected " + (i-j));
  88             }
  89           }
  90         }
  91         // Compare strings with one char different and different sizes
  92         for (int i = 1; i <= SIZE; i++) {
  93           s1 = new String(a, 0, i);
  94           for (int j = 0; j < i; j++) {
  95             b[j] -= 3; // change char
  96             s2 = new String(b, 0, i);
  97             result = test(s1, s2);
  98             int chdiff = a[j] - b[j];
  99             if (result != chdiff) {
 100               failed = true;
 101               System.out.println("Failed diff char s1[" + i + "], s2[" + i + "]: result = " + result + ", expected " + chdiff);
 102             }
 103             result = test(s2, s1);
 104             chdiff = b[j] - a[j];
 105             if (result != chdiff) {
 106               failed = true;
 107               System.out.println("Failed diff char s2[" + i + "], s1[" + i + "]: result = " + result + ", expected " + chdiff);
 108             }
 109             b[j] += 3; // restore
 110           }
 111         }
 112         if (failed) {
 113           System.out.println("FAILED");
 114           System.exit(97);
 115         }
 116         System.out.println("PASSED");
 117     }
 118 
 119     private static int test(String str1, String str2) {
 120         return str1.compareTo(str2);
 121     }
 122 }