hotspot/test/compiler/intrinsics/mathexact/MulExactIRepeatTest.java
author rbackman
Fri, 22 Nov 2013 14:14:26 +0100
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child 22911 ff49c48c887d
permissions -rw-r--r--
8028997: mathexact intrinsics are unstable Reviewed-by: iveresov, kvn
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/*
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 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/*
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 * @test
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 * @bug 8026844
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 * @summary Test repeating multiplyExact
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 * @compile MulExactIRepeatTest.java Verify.java
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 * @run main MulExactIRepeatTest -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseMathExactIntrinsics
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 *
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 */
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public class MulExactIRepeatTest {
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    public static void main(String[] args) {
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        runTest(new Verify.MulExactI());
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    }
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    public static int nonExact(int x, int y, Verify.BinaryMethod method) {
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        int result = method.unchecked(x, y);
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        result += method.unchecked(x, y);
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        result += method.unchecked(x, y);
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        result += method.unchecked(x, y);
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        return result;
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    }
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    public static void runTest(Verify.BinaryMethod method) {
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        java.util.Random rnd = new java.util.Random();
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        for (int i = 0; i < 50000; ++i) {
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            int x = Integer.MAX_VALUE - 10;
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            int y = Integer.MAX_VALUE - 10 + rnd.nextInt(5);
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            int c = rnd.nextInt() / 10;
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            int d = rnd.nextInt(9);
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            int a = catchingExact(x, y, method);
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            if (a != 36) {
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                throw new RuntimeException("a != 36 : " + a);
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            }
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            int b = nonExact(c, d, method);
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            int n = exact(c, d, method);
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            if (n != b) {
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                throw new RuntimeException("n != b : " + n + " != " + b);
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            }
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        }
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    }
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    public static int exact(int x, int y, Verify.BinaryMethod method) {
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        int result = 0;
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        result += method.checkMethod(x, y);
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        result += method.checkMethod(x, y);
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        result += method.checkMethod(x, y);
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        result += method.checkMethod(x, y);
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        return result;
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    }
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    public static int catchingExact(int x, int y, Verify.BinaryMethod method) {
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        int result = 0;
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        try {
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            result += 5;
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            result = method.checkMethod(x, y);
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        } catch (ArithmeticException e) {
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            result += 1;
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        }
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        try {
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            result += 6;
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            result += method.checkMethod(x, y);
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        } catch (ArithmeticException e) {
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            result += 2;
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        }
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        try {
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            result += 7;
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            result += method.checkMethod(x, y);
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        } catch (ArithmeticException e) {
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            result += 3;
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        }
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        try {
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            result += 8;
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            result += method.checkMethod(x, y);
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        } catch (ArithmeticException e) {
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            result += 4;
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        }
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        return result;
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    }
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}