115 lines
3.3 KiB
Java
115 lines
3.3 KiB
Java
/*
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* Copyright (c) 2023, 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.Blackhole;
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import java.util.Random;
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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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@Measurement(iterations = 5, time = 1000, timeUnit = TimeUnit.MILLISECONDS)
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@Warmup(iterations = 5, time = 1000, timeUnit = TimeUnit.MILLISECONDS)
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@Fork(3)
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public class LShiftNodeIdealize {
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private static final int SIZE = 3000;
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@Benchmark
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public void testShiftInt(Blackhole blackhole) {
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for (int i = 0; i < SIZE; i++) {
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blackhole.consume((i >> 4) << 8);
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}
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}
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@Benchmark
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public void testShiftInt2(Blackhole blackhole) {
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for (int i = 0; i < SIZE; i++) {
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blackhole.consume((i >> 8) << 4);
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}
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}
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@Benchmark
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public void testShiftAndInt(Blackhole blackhole) {
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for (int i = 0; i < SIZE; i++) {
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blackhole.consume(((i >> 4) & 0x01) << 8);
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}
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}
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@Benchmark
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public void testShiftLong(Blackhole blackhole) {
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for (long i = 0; i < SIZE; i++) {
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blackhole.consume((i >> 4L) << 8L);
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}
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}
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@Benchmark
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public void testShiftLong2(Blackhole blackhole) {
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for (long i = 0; i < SIZE; i++) {
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blackhole.consume((i >> 8L) << 4L);
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}
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}
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@Benchmark
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public void testShiftAndLong(Blackhole blackhole) {
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for (long i = 0; i < SIZE; i++) {
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blackhole.consume(((i >> 4L) & 0x01L) << 8L);
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}
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}
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@Benchmark
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public void testRgbaToAbgr(Blackhole blackhole, BenchState state) {
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for (int i = 0; i < 64; i++) {
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blackhole.consume(rgbaToAbgr(state.ints[i]));
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}
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}
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private static int rgbaToAbgr(int i) {
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int r = i & 0xFF;
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int g = (i & 0xFF00) >> 8;
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int b = (i & 0xFF0000) >> 16;
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int a = (i & 0xFF000000) >> 24;
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return (r << 24) | (g << 16) | (b << 8) | a;
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}
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@State(Scope.Benchmark)
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public static class BenchState {
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int[] ints;
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public BenchState() {
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}
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@Setup
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public void setup() {
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Random random = new Random(1000);
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ints = new int[64];
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for (int i = 0; i < 64; i++) {
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ints[i] = random.nextInt();
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}
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}
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}
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}
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