/*

 * 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.replacements.amd64;

import static org.graalvm.compiler.nodeinfo.InputType.Memory;

import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_UNKNOWN;

import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_512;

import org.graalvm.compiler.core.common.type.StampFactory;

import org.graalvm.compiler.graph.NodeClass;

import org.graalvm.compiler.lir.gen.LIRGeneratorTool;

import org.graalvm.compiler.nodeinfo.NodeInfo;

import org.graalvm.compiler.nodes.FixedWithNextNode;

import org.graalvm.compiler.nodes.NamedLocationIdentity;

import org.graalvm.compiler.nodes.ValueNode;

import org.graalvm.compiler.nodes.ValueNodeUtil;

import org.graalvm.compiler.nodes.memory.MemoryAccess;

import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;

import org.graalvm.compiler.nodes.memory.MemoryNode;

import org.graalvm.compiler.nodes.spi.LIRLowerable;

import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;

import jdk.internal.vm.compiler.word.LocationIdentity;

import jdk.internal.vm.compiler.word.Pointer;

import jdk.vm.ci.meta.JavaKind;

import jdk.vm.ci.meta.Value;

@NodeInfo(allowedUsageTypes = Memory, size = SIZE_512, cycles = CYCLES_UNKNOWN)

public final class AMD64StringUTF16CompressNode extends FixedWithNextNode

                implements LIRLowerable, MemoryCheckpoint.Multi, MemoryAccess {

    public static final NodeClass<AMD64StringUTF16CompressNode> TYPE = NodeClass.create(AMD64StringUTF16CompressNode.class);

    @Input private ValueNode src;

    @Input private ValueNode dst;

    @Input private ValueNode len;

    final JavaKind readKind;

    @OptionalInput(Memory) private MemoryNode lla; // Last access location registered.

    // java.lang.StringUTF16.compress([CI[BII)I

    //

    // int compress(char[] src, int src_indx, byte[] dst, int dst_indx, int len)

    //

    // Represented as a graph node by:

    public AMD64StringUTF16CompressNode(ValueNode src, ValueNode dst, ValueNode len, JavaKind readKind) {

        super(TYPE, StampFactory.forInteger(32));

        this.src = src;

        this.dst = dst;

        this.len = len;

        this.readKind = readKind;

    }

    @Override

    public LocationIdentity getLocationIdentity() {

        // Model read access via 'src' using:

        return NamedLocationIdentity.getArrayLocation(readKind);

    }

    @Override

        // Model write access via 'dst' using:

        return new LocationIdentity[]{NamedLocationIdentity.getArrayLocation(JavaKind.Byte)};

    }

    @Override

    public void generate(NodeLIRBuilderTool gen) {

        LIRGeneratorTool lgt = gen.getLIRGeneratorTool();

        Value res = lgt.emitStringUTF16Compress(gen.operand(src), gen.operand(dst), gen.operand(len));

        gen.setResult(this, res);

    }

    @Override

    public MemoryNode getLastLocationAccess() {

        return lla;

    }

    @Override

    public void setLastLocationAccess(MemoryNode newlla) {

        updateUsages(ValueNodeUtil.asNode(lla), ValueNodeUtil.asNode(newlla));

        lla = newlla;

    }

    @NodeIntrinsic

    public static native int compress(Pointer src, Pointer dst, int len, @ConstantNodeParameter JavaKind readKind);

}