131 lines
4.1 KiB
Java
131 lines
4.1 KiB
Java
/*
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* Copyright (c) 2022, 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.Fork;
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import org.openjdk.jmh.annotations.Measurement;
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import org.openjdk.jmh.annotations.Mode;
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import org.openjdk.jmh.annotations.OperationsPerInvocation;
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import org.openjdk.jmh.annotations.OutputTimeUnit;
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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.Warmup;
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import java.util.random.RandomGenerator;
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import java.util.random.RandomGeneratorFactory;
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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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@Warmup(iterations = 5, time = 1)
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@Measurement(iterations = 5, time = 1)
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@Fork(3)
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public class DoubleClassCheck {
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static final int BUFFER_SIZE = 1024;
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double[] inputs;
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boolean[] storeOutputs;
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int[] cmovOutputs;
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int[] branchOutputs;
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@CompilerControl(CompilerControl.Mode.DONT_INLINE)
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static int call() {
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return 1;
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}
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@Setup
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public void setup() {
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storeOutputs = new boolean[BUFFER_SIZE];
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cmovOutputs = new int[BUFFER_SIZE];
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branchOutputs = new int[BUFFER_SIZE];
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inputs = new double[BUFFER_SIZE];
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RandomGenerator rng = RandomGeneratorFactory.getDefault().create(0);
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double input;
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for (int i = 0; i < BUFFER_SIZE; i++) {
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if (i % 5 == 0) {
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input = (i%2 == 0) ? Double.NEGATIVE_INFINITY : Double.POSITIVE_INFINITY;
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}
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else if (i % 3 == 0) input = Double.NaN;
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else input = rng.nextDouble();
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inputs[i] = input;
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}
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}
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@Benchmark
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@OperationsPerInvocation(BUFFER_SIZE)
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public void testIsInfiniteStore() {
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for (int i = 0; i < BUFFER_SIZE; i++) {
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storeOutputs[i] = Double.isInfinite(inputs[i]);
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}
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}
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@Benchmark
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@OperationsPerInvocation(BUFFER_SIZE)
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public void testIsInfiniteCMov() {
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for (int i = 0; i < BUFFER_SIZE; i++) {
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cmovOutputs[i] = Double.isInfinite(inputs[i]) ? 9 : 7;
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}
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}
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@Benchmark
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@OperationsPerInvocation(BUFFER_SIZE)
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public void testIsInfiniteBranch() {
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for (int i = 0; i < BUFFER_SIZE; i++) {
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cmovOutputs[i] = Double.isInfinite(inputs[i]) ? call() : 7;
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}
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}
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@Benchmark
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@OperationsPerInvocation(BUFFER_SIZE)
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public void testIsFiniteStore() {
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for (int i = 0; i < BUFFER_SIZE; i++) {
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storeOutputs[i] = Double.isFinite(inputs[i]);
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}
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}
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@Benchmark
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@OperationsPerInvocation(BUFFER_SIZE)
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public void testIsFiniteCMov() {
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for (int i = 0; i < BUFFER_SIZE; i++) {
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cmovOutputs[i] = Double.isFinite(inputs[i]) ? 9 : 7;
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}
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}
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@Benchmark
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@OperationsPerInvocation(BUFFER_SIZE)
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public void testIsFiniteBranch() {
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for (int i = 0; i < BUFFER_SIZE; i++) {
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cmovOutputs[i] = Double.isFinite(inputs[i]) ? call() : 7;
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}
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}
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}
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