--- /dev/null 2016-05-31 09:42:47.975716356 -0700 +++ new/src/jdk.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/replacements/CRC32Substitutions.java 2016-12-09 00:49:50.485246240 -0800 @@ -0,0 +1,106 @@ +/* + * Copyright (c) 2012, 2015, 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. + */ +package org.graalvm.compiler.hotspot.replacements; + +import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.arrayBaseOffset; + +import java.util.zip.CRC32; + +import org.graalvm.compiler.api.replacements.ClassSubstitution; +import org.graalvm.compiler.api.replacements.Fold; +import org.graalvm.compiler.api.replacements.Fold.InjectedParameter; +import org.graalvm.compiler.api.replacements.MethodSubstitution; +import org.graalvm.compiler.core.common.spi.ForeignCallDescriptor; +import org.graalvm.compiler.graph.Node.ConstantNodeParameter; +import org.graalvm.compiler.graph.Node.NodeIntrinsic; +import org.graalvm.compiler.hotspot.GraalHotSpotVMConfig; +import org.graalvm.compiler.hotspot.nodes.ComputeObjectAddressNode; +import org.graalvm.compiler.hotspot.nodes.GraalHotSpotVMConfigNode; +import org.graalvm.compiler.nodes.extended.ForeignCallNode; +import org.graalvm.compiler.word.Word; + +import jdk.vm.ci.meta.JavaKind; + +// JaCoCo Exclude + +/** + * Substitutions for {@link CRC32}. + */ +@ClassSubstitution(CRC32.class) +public class CRC32Substitutions { + + /** + * Gets the address of {@code StubRoutines::x86::_crc_table} in {@code stubRoutines_x86.hpp}. + */ + @Fold + static long crcTableAddress(@InjectedParameter GraalHotSpotVMConfig config) { + return config.crcTableAddress; + } + + @MethodSubstitution + static int update(int crc, int b) { + final long crcTableRawAddress = GraalHotSpotVMConfigNode.crcTableAddress(); + + int c = ~crc; + int index = (b ^ c) & 0xFF; + int offset = index << 2; + int result = Word.unsigned(crcTableRawAddress).readInt(offset); + result = result ^ (c >>> 8); + return ~result; + } + + @MethodSubstitution + static int updateBytes(int crc, byte[] buf, int off, int len) { + Word bufAddr = Word.unsigned(ComputeObjectAddressNode.get(buf, arrayBaseOffset(JavaKind.Byte) + off)); + return updateBytesCRC32(UPDATE_BYTES_CRC32, crc, bufAddr, len); + } + + /** + * @since 9 + */ + @MethodSubstitution(optional = true) + static int updateBytes0(int crc, byte[] buf, int off, int len) { + Word bufAddr = Word.unsigned(ComputeObjectAddressNode.get(buf, arrayBaseOffset(JavaKind.Byte) + off)); + return updateBytesCRC32(UPDATE_BYTES_CRC32, crc, bufAddr, len); + } + + @MethodSubstitution + static int updateByteBuffer(int crc, long addr, int off, int len) { + Word bufAddr = Word.unsigned(addr).add(off); + return updateBytesCRC32(UPDATE_BYTES_CRC32, crc, bufAddr, len); + } + + /** + * @since 9 + */ + @MethodSubstitution(optional = true) + static int updateByteBuffer0(int crc, long addr, int off, int len) { + Word bufAddr = Word.unsigned(addr).add(off); + return updateBytesCRC32(UPDATE_BYTES_CRC32, crc, bufAddr, len); + } + + public static final ForeignCallDescriptor UPDATE_BYTES_CRC32 = new ForeignCallDescriptor("updateBytesCRC32", int.class, int.class, Word.class, int.class); + + @NodeIntrinsic(ForeignCallNode.class) + public static native int updateBytesCRC32(@ConstantNodeParameter ForeignCallDescriptor descriptor, int crc, Word buf, int length); +}