1 /*
   2  * Copyright (c) 2014, 2016, 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 package org.graalvm.compiler.hotspot.amd64;
  24 
  25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_UNKNOWN;
  26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_20;
  27 
  28 import org.graalvm.compiler.core.amd64.AMD64NodeLIRBuilder;
  29 import org.graalvm.compiler.core.common.type.RawPointerStamp;
  30 import org.graalvm.compiler.core.common.type.Stamp;
  31 import org.graalvm.compiler.core.common.type.StampFactory;
  32 import org.graalvm.compiler.graph.NodeClass;
  33 import org.graalvm.compiler.graph.NodeInputList;
  34 import org.graalvm.compiler.nodeinfo.NodeInfo;
  35 import org.graalvm.compiler.nodes.FixedWithNextNode;
  36 import org.graalvm.compiler.nodes.ValueNode;
  37 import org.graalvm.compiler.nodes.spi.LIRLowerable;
  38 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
  39 
  40 import jdk.vm.ci.code.CallingConvention;
  41 import jdk.vm.ci.hotspot.HotSpotCallingConventionType;
  42 import jdk.vm.ci.meta.JavaConstant;
  43 import jdk.vm.ci.meta.JavaKind;
  44 import jdk.vm.ci.meta.JavaType;
  45 import jdk.vm.ci.meta.MetaAccessProvider;
  46 import jdk.vm.ci.meta.ResolvedJavaType;
  47 import jdk.vm.ci.meta.Value;
  48 
  49 @NodeInfo(cycles = CYCLES_UNKNOWN, cyclesRationale = "Native call is a block hole", size = SIZE_20)
  50 public final class AMD64RawNativeCallNode extends FixedWithNextNode implements LIRLowerable {
  51     public static final NodeClass<AMD64RawNativeCallNode> TYPE = NodeClass.create(AMD64RawNativeCallNode.class);
  52 
  53     protected final JavaConstant functionPointer;
  54     @Input NodeInputList<ValueNode> args;
  55 
  56     public AMD64RawNativeCallNode(JavaKind returnType, JavaConstant functionPointer, ValueNode[] args) {
  57         super(TYPE, StampFactory.forKind(returnType));
  58         this.functionPointer = functionPointer;
  59         this.args = new NodeInputList<>(this, args);
  60     }
  61 
  62     private static class PointerType implements JavaType {
  63 
  64         @Override
  65         public String getName() {
  66             return "void*";
  67         }
  68 
  69         @Override
  70         public JavaType getComponentType() {
  71             return null;
  72         }
  73 
  74         @Override
  75         public JavaType getArrayClass() {
  76             return null;
  77         }
  78 
  79         @Override
  80         public JavaKind getJavaKind() {
  81             // native pointers and java objects use the same registers in the calling convention
  82             return JavaKind.Object;
  83         }
  84 
  85         @Override
  86         public ResolvedJavaType resolve(ResolvedJavaType accessingClass) {
  87             return null;
  88         }
  89     }
  90 
  91     private static JavaType toJavaType(Stamp stamp, MetaAccessProvider metaAccess) {
  92         if (stamp instanceof RawPointerStamp) {
  93             return new PointerType();
  94         } else {
  95             return stamp.javaType(metaAccess);
  96         }
  97     }
  98 
  99     @Override
 100     public void generate(NodeLIRBuilderTool generator) {
 101         AMD64NodeLIRBuilder gen = (AMD64NodeLIRBuilder) generator;
 102         Value[] parameter = new Value[args.count()];
 103         JavaType[] parameterTypes = new JavaType[args.count()];
 104         for (int i = 0; i < args.count(); i++) {
 105             parameter[i] = generator.operand(args.get(i));
 106             parameterTypes[i] = toJavaType(args.get(i).stamp(), gen.getLIRGeneratorTool().getMetaAccess());
 107         }
 108         JavaType returnType = toJavaType(stamp(), gen.getLIRGeneratorTool().getMetaAccess());
 109         CallingConvention cc = generator.getLIRGeneratorTool().getCodeCache().getRegisterConfig().getCallingConvention(HotSpotCallingConventionType.NativeCall, returnType, parameterTypes,
 110                         generator.getLIRGeneratorTool());
 111         gen.getLIRGeneratorTool().emitCCall(functionPointer.asLong(), cc, parameter, countFloatingTypeArguments(args));
 112         if (this.getStackKind() != JavaKind.Void) {
 113             generator.setResult(this, gen.getLIRGeneratorTool().emitMove(cc.getReturn()));
 114         }
 115     }
 116 
 117     private static int countFloatingTypeArguments(NodeInputList<ValueNode> args) {
 118         int count = 0;
 119         for (ValueNode n : args) {
 120             if (n.getStackKind() == JavaKind.Double || n.getStackKind() == JavaKind.Float) {
 121                 count++;
 122             }
 123         }
 124         if (count > 8) {
 125             return 8;
 126         }
 127         return count;
 128     }
 129 
 130 }