1 /*
   2  * Copyright (c) 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 /**
  26  * @test
  27  * @bug 8081778
  28  * @summary Add C2 x86 intrinsic for BigInteger::squareToLen() method
  29  *
  30  * @run main/othervm/timeout=600 -XX:-TieredCompilation -Xbatch
  31  *      -XX:+IgnoreUnrecognizedVMOptions
  32  *      -XX:+UseSquareToLenIntrinsic
  33  *      -XX:CompileCommand=exclude,TestSquareToLen::main
  34  *      -XX:CompileCommand=option,TestSquareToLen::base_multiply,ccstr,DisableIntrinsic,_squareToLen
  35  *      -XX:CompileCommand=option,java.math.BigInteger::multiply,ccstr,DisableIntrinsic,_squareToLen
  36  *      -XX:CompileCommand=option,java.math.BigInteger::square,ccstr,DisableIntrinsic,_squareToLen
  37  *      -XX:CompileCommand=option,java.math.BigInteger::squareToLen,ccstr,DisableIntrinsic,_squareToLen
  38  *      -XX:CompileCommand=inline,java.math.BigInteger::multiply
  39  *      -XX:CompileCommand=inline,java.math.BigInteger::square
  40  *      -XX:CompileCommand=inline,java.math.BigInteger::squareToLen TestSquareToLen
  41  */
  42 
  43 import java.util.Random;
  44 import java.math.*;
  45 
  46 public class TestSquareToLen {
  47 
  48     // Avoid intrinsic by preventing inlining multiply() and squareToLen().
  49     public static BigInteger base_multiply(BigInteger op1) {
  50       return op1.multiply(op1);
  51     }
  52 
  53     // Generate squareToLen() intrinsic by inlining multiply().
  54     public static BigInteger new_multiply(BigInteger op1) {
  55       return op1.multiply(op1);
  56     }
  57 
  58     public static boolean bytecompare(BigInteger b1, BigInteger b2) {
  59       byte[] data1 = b1.toByteArray();
  60       byte[] data2 = b2.toByteArray();
  61       if (data1.length != data2.length)
  62         return false;
  63       for (int i = 0; i < data1.length; i++) {
  64         if (data1[i] != data2[i])
  65           return false;
  66       }
  67       return true;
  68     }
  69 
  70     public static String stringify(BigInteger b) {
  71       String strout= "";
  72       byte [] data = b.toByteArray();
  73       for (int i = 0; i < data.length; i++) {
  74         strout += (String.format("%02x",data[i]) + " ");
  75       }
  76       return strout;
  77     }
  78 
  79     public static void main(String args[]) throws Exception {
  80 
  81       BigInteger oldsum = new BigInteger("0");
  82       BigInteger newsum = new BigInteger("0");
  83 
  84       BigInteger b1, b2, oldres, newres;
  85 
  86       Random rand = new Random();
  87       long seed = System.nanoTime();
  88       Random rand1 = new Random();
  89       long seed1 = System.nanoTime();
  90       rand.setSeed(seed);
  91       rand1.setSeed(seed1);
  92 
  93       for (int j = 0; j < 100000; j++) {
  94         int rand_int = rand1.nextInt(3136)+32;
  95         b1 = new BigInteger(rand_int, rand);
  96 
  97         oldres = base_multiply(b1);
  98         newres = new_multiply(b1);
  99 
 100         oldsum = oldsum.add(oldres);
 101         newsum = newsum.add(newres);
 102 
 103         if (!bytecompare(oldres,newres)) {
 104           System.out.print("mismatch for:b1:" + stringify(b1) + " :oldres:" + stringify(oldres) + " :newres:" + stringify(newres));
 105           System.out.println(b1);
 106           throw new Exception("Failed");
 107         }
 108       }
 109       if (!bytecompare(oldsum,newsum))  {
 110         System.out.println("Failure: oldsum:" + stringify(oldsum) + " newsum:" + stringify(newsum));
 111         throw new Exception("Failed");
 112       } else {
 113         System.out.println("Success");
 114       }
 115    }
 116 }