Mercurial > hg > graal-compiler
view test/compiler/7088419/CRCTest.java @ 13799:d2837f5c79ce
FixedGuardNode simplification should conserve the deoptimization action
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Wed, 29 Jan 2014 15:46:15 +0100 |
parents | b800986664f4 |
children |
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/* * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ /* @test @bug 7088419 @run main CRCTest @summary Use x86 Hardware CRC32 Instruction with java.util.zip.CRC32 and java.util.zip.Adler32 */ import java.nio.ByteBuffer; import java.util.zip.CRC32; import java.util.zip.Checksum; public class CRCTest { public static void main(String[] args) throws Exception { byte[] b = initializedBytes(4096 * 4096); { CRC32 crc1 = new CRC32(); CRC32 crc2 = new CRC32(); CRC32 crc3 = new CRC32(); CRC32 crc4 = new CRC32(); crc1.update(b, 0, b.length); updateSerial(crc2, b, 0, b.length); updateDirect(crc3, b, 0, b.length); updateSerialSlow(crc4, b, 0, b.length); check(crc1, crc2); check(crc3, crc4); check(crc1, crc3); crc1.update(17); crc2.update(17); crc3.update(17); crc4.update(17); crc1.update(b, 1, b.length-2); updateSerial(crc2, b, 1, b.length-2); updateDirect(crc3, b, 1, b.length-2); updateSerialSlow(crc4, b, 1, b.length-2); check(crc1, crc2); check(crc3, crc4); check(crc1, crc3); report("finished huge crc", crc1, crc2, crc3, crc4); for (int i = 0; i < 256; i++) { for (int j = 0; j < 256; j += 1) { crc1.update(b, i, j); updateSerial(crc2, b, i, j); updateDirect(crc3, b, i, j); updateSerialSlow(crc4, b, i, j); check(crc1, crc2); check(crc3, crc4); check(crc1, crc3); } } report("finished small survey crc", crc1, crc2, crc3, crc4); } } private static void report(String s, Checksum crc1, Checksum crc2, Checksum crc3, Checksum crc4) { System.out.println(s + ", crc1 = " + crc1.getValue() + ", crc2 = " + crc2.getValue()+ ", crc3 = " + crc3.getValue()+ ", crc4 = " + crc4.getValue()); } private static void check(Checksum crc1, Checksum crc2) throws Exception { if (crc1.getValue() != crc2.getValue()) { String s = "value 1 = " + crc1.getValue() + ", value 2 = " + crc2.getValue(); System.err.println(s); throw new Exception(s); } } private static byte[] initializedBytes(int M) { byte[] bytes = new byte[M]; for (int i = 0; i < bytes.length; i++) { bytes[i] = (byte) i; } return bytes; } private static void updateSerial(Checksum crc, byte[] b, int start, int length) { for (int i = 0; i < length; i++) crc.update(b[i+start]); } private static void updateSerialSlow(Checksum crc, byte[] b, int start, int length) { for (int i = 0; i < length; i++) crc.update(b[i+start]); crc.getValue(); } private static void updateDirect(CRC32 crc3, byte[] b, int start, int length) { ByteBuffer buf = ByteBuffer.allocateDirect(length); buf.put(b, start, length); buf.flip(); crc3.update(buf); } }