109 lines
3.3 KiB
Java
109 lines
3.3 KiB
Java
/*
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* Copyright (c) 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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package org.openjdk.bench.vm.compiler;
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import org.openjdk.jmh.annotations.*;
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import org.openjdk.jmh.infra.*;
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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 = 4, time = 2, timeUnit = TimeUnit.SECONDS)
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@Measurement(iterations = 4, time = 2, timeUnit = TimeUnit.SECONDS)
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@Fork(value = 3)
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public class BitSetAndReset {
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private static final int COUNT = 10_000;
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private static final long MASK63 = 0x8000_0000_0000_0000L;
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private static final long MASK31 = 0x0000_0000_8000_0000L;
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private static final long MASK15 = 0x0000_0000_0000_8000L;
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private static final long MASK00 = 0x0000_0000_0000_0001L;
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private long andq, orq;
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private boolean success = true;
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@TearDown(Level.Iteration)
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public void finish() {
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if (!success)
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throw new AssertionError("Failure while setting or clearing long vector bits!");
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}
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@Benchmark
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public void bitSet(Blackhole bh) {
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for (int i=0; i<COUNT; i++) {
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andq = MASK63 | MASK31 | MASK15 | MASK00;
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orq = 0;
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bh.consume(test63());
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bh.consume(test31());
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bh.consume(test15());
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bh.consume(test00());
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success &= andq == 0 && orq == (MASK63 | MASK31 | MASK15 | MASK00);
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}
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}
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private long test63() {
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andq &= ~MASK63;
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orq |= MASK63;
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return 0L;
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}
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private long test31() {
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andq &= ~MASK31;
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orq |= MASK31;
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return 0L;
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}
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private long test15() {
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andq &= ~MASK15;
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orq |= MASK15;
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return 0L;
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}
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private long test00() {
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andq &= ~MASK00;
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orq |= MASK00;
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return 0L;
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}
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private static final long MASK62 = 0x4000_0000_0000_0000L;
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private static final long MASK61 = 0x2000_0000_0000_0000L;
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private static final long MASK60 = 0x1000_0000_0000_0000L;
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private long orq63, orq62, orq61, orq60;
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@Benchmark
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public void throughput(Blackhole bh) {
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for (int i=0; i<COUNT; i++) {
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orq63 = orq62 = orq61 = orq60 = 0;
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bh.consume(testTp());
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}
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}
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private long testTp() {
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orq63 |= MASK63;
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orq62 |= MASK62;
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orq61 |= MASK61;
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orq60 |= MASK60;
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return 0L;
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}
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}
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