89 lines
2.9 KiB
Java
89 lines
2.9 KiB
Java
/*
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* Copyright (c) 2018, 2024, 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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* @test
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* @bug 8199421
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* @summary Test vectorization of popcount
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* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UsePopCountInstruction
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* compiler.vectorization.TestPopCountVector
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* @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UsePopCountInstruction
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* -XX:MaxVectorSize=8 compiler.vectorization.TestPopCountVector
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*/
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package compiler.vectorization;
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public class TestPopCountVector {
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private int[] input;
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private int[] output;
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private static final int LEN = 1024;
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public static void main(String args[]) {
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TestPopCountVector test = new TestPopCountVector();
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int err = 0;
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for (int i = 0; i < 10_000; ++i) {
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test.vectorizeBitCount();
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}
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System.out.println("Checking popcount result");
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err += test.checkResult();
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for (int i = 0; i < 10_000; ++i) {
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test.vectorizeBitCount();
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}
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System.out.println("Checking popcount result");
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err += test.checkResult();
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if (err > 0) {
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throw new RuntimeException("Error!");
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}
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}
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public TestPopCountVector() {
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input = new int[LEN];
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output = new int[LEN];
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for (int i = 0; i < LEN; ++i) {
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input[i] = i % 2 == 0 ? i : -1 * i;
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}
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}
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public void vectorizeBitCount() {
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for (int i = 0; i < LEN; ++i) {
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output[i] = Integer.bitCount(input[i]);
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}
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}
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public int checkResult() {
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int err = 0;
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for (int i = 0; i < LEN; ++i) {
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int expected = Integer.bitCount(input[i]);
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if (output[i] != expected) {
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err++;
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System.err.println("Invalid result: output[" + i + "] = " + output[i] + " != " + expected +
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", input[" + i + "] == " + Integer.toBinaryString(input[i]));
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}
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}
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return err;
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}
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}
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