79 lines
2.2 KiB
Java
79 lines
2.2 KiB
Java
//
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// Copyright (c) 2003, 2019, 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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package org.openjdk.bench.java.math;
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import java.util.Random;
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import java.util.concurrent.TimeUnit;
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import org.openjdk.jmh.annotations.*;
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import org.openjdk.jmh.infra.Blackhole;
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@OutputTimeUnit(TimeUnit.MILLISECONDS)
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@State(Scope.Thread)
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public class FpRoundingBenchmark {
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@Param({"1024"})
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public int TESTSIZE;
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public double[] DargV1;
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public double[] Res;
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public final double[] DspecialVals = {
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0.0, -0.0, Double.NaN, Double.NEGATIVE_INFINITY, Double.POSITIVE_INFINITY};
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@Setup(Level.Trial)
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public void BmSetup() {
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int i = 0;
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Random r = new Random(1024);
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DargV1 = new double[TESTSIZE];
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Res = new double[TESTSIZE];
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for (; i < DspecialVals.length; i++) {
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DargV1[i] = DspecialVals[i];
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}
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for (; i < TESTSIZE; i++) {
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DargV1[i] = r.nextDouble()*TESTSIZE;
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}
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}
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@Benchmark
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public void testceil(Blackhole bh) {
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for (int i = 0; i < TESTSIZE; i++)
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Res[i] = Math.ceil(DargV1[i]);
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}
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@Benchmark
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public void testfloor(Blackhole bh) {
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for (int i = 0; i < TESTSIZE; i++)
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Res[i] = Math.floor(DargV1[i]);
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}
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@Benchmark
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public void testrint(Blackhole bh) {
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for (int i = 0; i < TESTSIZE; i++)
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Res[i] = Math.rint(DargV1[i]);
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}
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}
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