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 * 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.
 *
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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 CRC32.
/** * Substitutions for {@link CRC32}. */
@ClassSubstitution(CRC32.class) public class CRC32Substitutions {
Gets the address of StubRoutines::x86::_crc_table in stubRoutines_x86.hpp.
/** * 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.
/** * 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.
/** * 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
/** * @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.
/** * 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
/** * @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); }