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 }