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 * @test
26 * @bug 8081778
27 * @summary Add C2 x86 intrinsic for BigInteger::squareToLen() method
28 *
29 * @run main/othervm/timeout=600 -XX:-TieredCompilation -Xbatch
30 *      -XX:CompileCommand=exclude,compiler.intrinsics.bigInteger.TestSquareToLen::main
31 *      -XX:CompileCommand=option,compiler.intrinsics.bigInteger.TestSquareToLen::base_multiply,ccstr,DisableIntrinsic,_squareToLen
32 *      -XX:CompileCommand=option,java.math.BigInteger::multiply,ccstr,DisableIntrinsic,_squareToLen
33 *      -XX:CompileCommand=option,java.math.BigInteger::square,ccstr,DisableIntrinsic,_squareToLen
34 *      -XX:CompileCommand=option,java.math.BigInteger::squareToLen,ccstr,DisableIntrinsic,_squareToLen
35 *      -XX:CompileCommand=inline,java.math.BigInteger::multiply
36 *      -XX:CompileCommand=inline,java.math.BigInteger::square
37 *      -XX:CompileCommand=inline,java.math.BigInteger::squareToLen
38 *      compiler.intrinsics.bigInteger.TestSquareToLen
39 */
40
41package compiler.intrinsics.bigInteger;
42
43import java.math.BigInteger;
44import java.util.Random;
45
46public 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}
117