| /* |
| * 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.GraalHotSpotVMConfigBase.INJECTED_METAACCESS; |
| import static org.graalvm.compiler.hotspot.replacements.HotSpotReplacementsUtil.getArrayBaseOffset; |
| |
| 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.internal.vm.compiler.word.Pointer; |
| import jdk.internal.vm.compiler.word.WordBase; |
| import jdk.internal.vm.compiler.word.WordFactory; |
| |
| 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; |
| } |
| |
| /** |
| * Removed in 9. |
| */ |
| @MethodSubstitution(optional = true) |
| static int update(int crc, int b) { |
| final Pointer crcTableRawAddress = WordFactory.pointer(GraalHotSpotVMConfigNode.crcTableAddress()); |
| |
| int c = ~crc; |
| int index = (b ^ c) & 0xFF; |
| int offset = index << 2; |
| int result = crcTableRawAddress.readInt(offset); |
| result = result ^ (c >>> 8); |
| return ~result; |
| } |
| |
| /** |
| * Removed in 9. |
| */ |
| @MethodSubstitution(optional = true) |
| static int updateBytes(int crc, byte[] buf, int off, int len) { |
| Word bufAddr = WordFactory.unsigned(ComputeObjectAddressNode.get(buf, getArrayBaseOffset(INJECTED_METAACCESS, 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 = WordFactory.unsigned(ComputeObjectAddressNode.get(buf, getArrayBaseOffset(INJECTED_METAACCESS, JavaKind.Byte) + off)); |
| return updateBytesCRC32(UPDATE_BYTES_CRC32, crc, bufAddr, len); |
| } |
| |
| /** |
| * Removed in 9. |
| */ |
| @MethodSubstitution(optional = true) |
| static int updateByteBuffer(int crc, long addr, int off, int len) { |
| WordBase bufAddr = WordFactory.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) { |
| WordBase bufAddr = WordFactory.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, WordBase.class, int.class); |
| |
| @NodeIntrinsic(ForeignCallNode.class) |
| public static native int updateBytesCRC32(@ConstantNodeParameter ForeignCallDescriptor descriptor, int crc, WordBase buf, int length); |
| } |