1 /*
   2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 package org.graalvm.compiler.replacements.amd64;
  26 
  27 import static org.graalvm.compiler.nodeinfo.InputType.Memory;
  28 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_UNKNOWN;
  29 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_512;
  30 
  31 import org.graalvm.compiler.core.common.type.StampFactory;
  32 import org.graalvm.compiler.graph.NodeClass;
  33 import org.graalvm.compiler.lir.gen.LIRGeneratorTool;
  34 import org.graalvm.compiler.nodeinfo.NodeInfo;
  35 import org.graalvm.compiler.nodes.FixedWithNextNode;
  36 import org.graalvm.compiler.nodes.NamedLocationIdentity;
  37 import org.graalvm.compiler.nodes.ValueNode;
  38 import org.graalvm.compiler.nodes.ValueNodeUtil;
  39 import org.graalvm.compiler.nodes.memory.MemoryAccess;
  40 import org.graalvm.compiler.nodes.memory.MemoryCheckpoint;
  41 import org.graalvm.compiler.nodes.memory.MemoryNode;
  42 import org.graalvm.compiler.nodes.spi.LIRLowerable;
  43 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
  44 import jdk.internal.vm.compiler.word.LocationIdentity;
  45 import jdk.internal.vm.compiler.word.Pointer;
  46 
  47 import jdk.vm.ci.meta.JavaKind;
  48 import jdk.vm.ci.meta.Value;
  49 
  50 @NodeInfo(allowedUsageTypes = Memory, size = SIZE_512, cycles = CYCLES_UNKNOWN)
  51 
  52 public final class AMD64StringUTF16CompressNode extends FixedWithNextNode
  53                 implements LIRLowerable, MemoryCheckpoint.Multi, MemoryAccess {
  54 
  55     public static final NodeClass<AMD64StringUTF16CompressNode> TYPE = NodeClass.create(AMD64StringUTF16CompressNode.class);
  56 
  57     @Input private ValueNode src;
  58     @Input private ValueNode dst;
  59     @Input private ValueNode len;
  60     final JavaKind readKind;
  61 
  62     @OptionalInput(Memory) private MemoryNode lla; // Last access location registered.
  63 
  64     // java.lang.StringUTF16.compress([CI[BII)I
  65     //
  66     // int compress(char[] src, int src_indx, byte[] dst, int dst_indx, int len)
  67     //
  68     // Represented as a graph node by:
  69 
  70     public AMD64StringUTF16CompressNode(ValueNode src, ValueNode dst, ValueNode len, JavaKind readKind) {
  71         super(TYPE, StampFactory.forInteger(32));
  72         this.src = src;
  73         this.dst = dst;
  74         this.len = len;
  75         this.readKind = readKind;
  76     }
  77 
  78     @Override
  79     public LocationIdentity getLocationIdentity() {
  80         // Model read access via 'src' using:
  81         return NamedLocationIdentity.getArrayLocation(readKind);
  82     }
  83 
  84     @Override
  85     public LocationIdentity[] getLocationIdentities() {
  86         // Model write access via 'dst' using:
  87         return new LocationIdentity[]{NamedLocationIdentity.getArrayLocation(JavaKind.Byte)};
  88     }
  89 
  90     @Override
  91     public void generate(NodeLIRBuilderTool gen) {
  92         LIRGeneratorTool lgt = gen.getLIRGeneratorTool();
  93         Value res = lgt.emitStringUTF16Compress(gen.operand(src), gen.operand(dst), gen.operand(len));
  94         gen.setResult(this, res);
  95     }
  96 
  97     @Override
  98     public MemoryNode getLastLocationAccess() {
  99         return lla;
 100     }
 101 
 102     @Override
 103     public void setLastLocationAccess(MemoryNode newlla) {
 104         updateUsages(ValueNodeUtil.asNode(lla), ValueNodeUtil.asNode(newlla));
 105         lla = newlla;
 106     }
 107 
 108     @NodeIntrinsic
 109     public static native int compress(Pointer src, Pointer dst, int len, @ConstantNodeParameter JavaKind readKind);
 110 }