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comparison test/compiler/intrinsics/multiplytolen/TestMultiplyToLen.java @ 20438:166d744df0de

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8055494: Add C2 x86 intrinsic for BigInteger::multiplyToLen() method Summary: Add new C2 intrinsic for BigInteger::multiplyToLen() on x86 in 64-bit VM. Reviewed-by: roland
author kvn
date Tue, 02 Sep 2014 12:48:45 -0700
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20437:bddcb33dadf4 20438:166d744df0de
1 /*
2 * Copyright (c) 2014, 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 8055494
28 * @summary Add C2 x86 intrinsic for BigInteger::multiplyToLen() method
29 *
30 * @run main/othervm/timeout=600 -XX:-TieredCompilation -Xbatch
31 * -XX:CompileCommand=exclude,TestMultiplyToLen::main
32 * -XX:CompileCommand=option,TestMultiplyToLen::base_multiply,ccstr,DisableIntrinsic,_multiplyToLen
33 * -XX:CompileCommand=option,java.math.BigInteger::multiply,ccstr,DisableIntrinsic,_multiplyToLen
34 * -XX:CompileCommand=inline,java.math.BigInteger::multiply TestMultiplyToLen
35 */
36
37 import java.util.Random;
38 import java.math.*;
39
40 public class TestMultiplyToLen {
41
42 // Avoid intrinsic by preventing inlining multiply() and multiplyToLen().
43 public static BigInteger base_multiply(BigInteger op1, BigInteger op2) {
44 return op1.multiply(op2);
45 }
46
47 // Generate multiplyToLen() intrinsic by inlining multiply().
48 public static BigInteger new_multiply(BigInteger op1, BigInteger op2) {
49 return op1.multiply(op2);
50 }
51
52 public static boolean bytecompare(BigInteger b1, BigInteger b2) {
53 byte[] data1 = b1.toByteArray();
54 byte[] data2 = b2.toByteArray();
55 if (data1.length != data2.length)
56 return false;
57 for (int i = 0; i < data1.length; i++) {
58 if (data1[i] != data2[i])
59 return false;
60 }
61 return true;
62 }
63
64 public static String stringify(BigInteger b) {
65 String strout= "";
66 byte [] data = b.toByteArray();
67 for (int i = 0; i < data.length; i++) {
68 strout += (String.format("%02x",data[i]) + " ");
69 }
70 return strout;
71 }
72
73 public static void main(String args[]) throws Exception {
74
75 BigInteger oldsum = new BigInteger("0");
76 BigInteger newsum = new BigInteger("0");
77
78 BigInteger b1, b2, oldres, newres;
79
80 Random rand = new Random();
81 long seed = System.nanoTime();
82 Random rand1 = new Random();
83 long seed1 = System.nanoTime();
84 rand.setSeed(seed);
85 rand1.setSeed(seed1);
86
87 for (int j = 0; j < 1000000; j++) {
88 int rand_int = rand1.nextInt(3136)+32;
89 int rand_int1 = rand1.nextInt(3136)+32;
90 b1 = new BigInteger(rand_int, rand);
91 b2 = new BigInteger(rand_int1, rand);
92
93 oldres = base_multiply(b1,b2);
94 newres = new_multiply(b1,b2);
95
96 oldsum = oldsum.add(oldres);
97 newsum = newsum.add(newres);
98
99 if (!bytecompare(oldres,newres)) {
100 System.out.print("mismatch for:b1:" + stringify(b1) + " :b2:" + stringify(b2) + " :oldres:" + stringify(oldres) + " :newres:" + stringify(newres));
101 System.out.println(b1);
102 System.out.println(b2);
103 throw new Exception("Failed");
104 }
105 }
106 if (!bytecompare(oldsum,newsum)) {
107 System.out.println("Failure: oldsum:" + stringify(oldsum) + " newsum:" + stringify(newsum));
108 throw new Exception("Failed");
109 } else {
110 System.out.println("Success");
111 }
112 }
113 }