126 lines
3.4 KiB
Java
126 lines
3.4 KiB
Java
//
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// Copyright (c) 2003, 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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//
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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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@OutputTimeUnit(TimeUnit.MILLISECONDS)
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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(value = 3)
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public class FpRoundingBenchmark {
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@Param({"2048"})
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public int TESTSIZE;
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public double[] DargV1;
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public double[] ResD;
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public long[] ResL;
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public float[] FargV1;
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public float[] ResF;
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public int[] ResI;
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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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Double.MAX_VALUE, -Double.MAX_VALUE, Double.MIN_VALUE, -Double.MIN_VALUE,
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Double.MIN_NORMAL
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};
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public final float[] FspecialVals = {
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0.0f, -0.0f, Float.NaN, Float.NEGATIVE_INFINITY, Float.POSITIVE_INFINITY,
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Float.MAX_VALUE, -Float.MAX_VALUE, Float.MIN_VALUE, -Float.MIN_VALUE,
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Float.MIN_NORMAL
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};
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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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ResD = 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] = Double.longBitsToDouble(r.nextLong());;
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}
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FargV1 = new float[TESTSIZE];
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ResF = new float[TESTSIZE];
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i = 0;
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for (; i < FspecialVals.length; i++) {
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FargV1[i] = FspecialVals[i];
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}
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for (; i < TESTSIZE; i++) {
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FargV1[i] = Float.intBitsToFloat(r.nextInt());
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}
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ResI = new int[TESTSIZE];
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ResL = new long[TESTSIZE];
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}
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@Benchmark
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public void test_ceil() {
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for (int i = 0; i < TESTSIZE; i++) {
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ResD[i] = Math.ceil(DargV1[i]);
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}
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}
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@Benchmark
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public void test_floor() {
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for (int i = 0; i < TESTSIZE; i++) {
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ResD[i] = Math.floor(DargV1[i]);
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}
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}
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@Benchmark
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public void test_rint() {
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for (int i = 0; i < TESTSIZE; i++) {
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ResD[i] = Math.rint(DargV1[i]);
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}
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}
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@Benchmark
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public void test_round_double() {
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for (int i = 0; i < TESTSIZE; i++) {
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ResL[i] = Math.round(DargV1[i]);
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}
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}
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@Benchmark
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public void test_round_float() {
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for (int i = 0; i < TESTSIZE; i++) {
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ResI[i] = Math.round(FargV1[i]);
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}
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}
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}
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