96 lines
3.3 KiB
Java
96 lines
3.3 KiB
Java
/*
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* Copyright (c) 2014, 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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package org.openjdk.bench.java.lang;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.BenchmarkMode;
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import org.openjdk.jmh.annotations.CompilerControl;
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import org.openjdk.jmh.annotations.Mode;
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import org.openjdk.jmh.annotations.OutputTimeUnit;
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import org.openjdk.jmh.annotations.Param;
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import org.openjdk.jmh.annotations.Scope;
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import org.openjdk.jmh.annotations.Setup;
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import org.openjdk.jmh.annotations.State;
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import org.openjdk.jmh.annotations.Threads;
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import java.util.Random;
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import java.util.concurrent.TimeUnit;
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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@State(Scope.Thread)
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public class MathBench {
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@Param("0")
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public long seed;
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public int dividend;
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public int divisor;
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public long longDividend;
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public long longDivisor;
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@Setup
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public void setupValues() {
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Random random = new Random(seed);
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dividend = Math.abs(random.nextInt() + 4711);
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divisor = Math.abs(random.nextInt(dividend) + 17);
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longDividend = Math.abs(random.nextLong() + 4711L);
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longDivisor = Math.abs(random.nextLong() + longDividend);
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}
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@Benchmark
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@CompilerControl(CompilerControl.Mode.DONT_INLINE)
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public int floorModIntIntPositive() {
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return Math.floorMod(dividend, divisor);
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}
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@Benchmark
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@CompilerControl(CompilerControl.Mode.DONT_INLINE)
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public int floorModIntInt() {
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return Math.floorMod( dividend, divisor) +
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Math.floorMod( dividend, -divisor) +
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Math.floorMod(-dividend, divisor) +
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Math.floorMod(-dividend, -divisor);
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}
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@Benchmark
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@CompilerControl(CompilerControl.Mode.DONT_INLINE)
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public int floorModLongInt() {
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return Math.floorMod( longDividend, divisor) +
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Math.floorMod( longDividend, -divisor) +
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Math.floorMod(-longDividend, divisor) +
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Math.floorMod(-longDividend, -divisor);
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}
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@Benchmark
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@CompilerControl(CompilerControl.Mode.DONT_INLINE)
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public long floorModLongLong() {
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return Math.floorMod( longDividend, longDivisor) +
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Math.floorMod( longDividend, -longDivisor) +
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Math.floorMod(-longDividend, longDivisor) +
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Math.floorMod(-longDividend, -longDivisor);
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}
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}
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