b438cffdb9
Co-authored-by: Vladimir Ivanov <vaivanov@openjdk.org> Reviewed-by: sviswanathan, ecaspole
109 lines
3.5 KiB
Java
109 lines
3.5 KiB
Java
/*
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* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2021, Arm Limited. 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.vm.compiler;
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import java.util.concurrent.TimeUnit;
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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.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 org.openjdk.jmh.infra.Blackhole;
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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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@Fork(value = 3)
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@Measurement(iterations = 5, time = 1000, timeUnit = TimeUnit.MILLISECONDS)
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@Warmup(iterations = 5, time = 1000, timeUnit = TimeUnit.MILLISECONDS)
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@CompilerControl(CompilerControl.Mode.DONT_INLINE)
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public class Rotation {
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private static final int COUNT = 5000;
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@State(Scope.Benchmark)
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public static class MyState {
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public int xi = 10;
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public int yi = 24;
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}
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@Benchmark
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public void xorRotateRight(MyState s, Blackhole blackhole) {
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int x = s.xi;
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int y = s.yi;
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for (int i = 0; i < COUNT; i++) {
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y = x ^ ((y >>> 5) | (y << -5));
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}
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blackhole.consume(y);
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}
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@Benchmark
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public void bicRotateRight(MyState s, Blackhole blackhole) {
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int x = s.xi;
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int y = s.yi;
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for (int i = 0; i < COUNT; i++) {
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y = x & (-1 ^ ((y >>> 5) | (y << -5)));
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}
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blackhole.consume(y);
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}
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@Benchmark
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public void eonRotateRight(MyState s, Blackhole blackhole) {
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int x = s.xi;
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int y = s.yi;
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for (int i = 0; i < COUNT; i++) {
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y = x ^ (-1 ^ ((y >>> 5) | (y << -5)));
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}
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blackhole.consume(y);
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}
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@Benchmark
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public void ornRotateRight(MyState s, Blackhole blackhole) {
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int x = s.xi;
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int y = s.yi;
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for (int i = 0; i < COUNT; i++) {
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y = x | (-1 ^ ((y >>> 5) | (y << -5)));
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}
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blackhole.consume(y);
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}
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@Benchmark
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public void andRotateRight(MyState s, Blackhole blackhole) {
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int x = s.xi;
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int y = s.yi;
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for (int i = 0; i < COUNT; i++) {
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y = x & ((y >>> 5) | (y << -5));
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}
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blackhole.consume(y);
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}
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}
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