src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.nodes/src/org/graalvm/compiler/nodes/calc/IntegerMulHighNode.java
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* version 2 for more details (a copy is included in the LICENSE file that
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package org.graalvm.compiler.nodes.calc;
import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_2;
import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_2;
import org.graalvm.compiler.core.common.type.ArithmeticOpTable;
import org.graalvm.compiler.core.common.type.ArithmeticOpTable.BinaryOp;
import org.graalvm.compiler.core.common.type.ArithmeticOpTable.BinaryOp.MulHigh;
import org.graalvm.compiler.graph.NodeClass;
import org.graalvm.compiler.graph.spi.Canonicalizable;
import org.graalvm.compiler.graph.spi.CanonicalizerTool;
import org.graalvm.compiler.lir.gen.ArithmeticLIRGeneratorTool;
import org.graalvm.compiler.nodeinfo.NodeInfo;
import org.graalvm.compiler.nodes.ConstantNode;
import org.graalvm.compiler.nodes.NodeView;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
import jdk.vm.ci.meta.Constant;
import jdk.vm.ci.meta.PrimitiveConstant;
import jdk.vm.ci.meta.Value;
@NodeInfo(shortName = "*H", cycles = CYCLES_2, size = SIZE_2)
public final class IntegerMulHighNode extends BinaryArithmeticNode<MulHigh> implements Canonicalizable.BinaryCommutative<ValueNode> {
public static final NodeClass<IntegerMulHighNode> TYPE = NodeClass.create(IntegerMulHighNode.class);
public IntegerMulHighNode(ValueNode x, ValueNode y) {
super(TYPE, getArithmeticOpTable(x).getMulHigh(), x, y);
}
@Override
protected BinaryOp<MulHigh> getOp(ArithmeticOpTable table) {
return table.getMulHigh();
}
@Override
public void generate(NodeLIRBuilderTool nodeValueMap, ArithmeticLIRGeneratorTool gen) {
Value a = nodeValueMap.operand(getX());
Value b = nodeValueMap.operand(getY());
nodeValueMap.setResult(this, gen.emitMulHigh(a, b));
}
@Override
public ValueNode canonical(CanonicalizerTool tool, ValueNode forX, ValueNode forY) {
ValueNode ret = super.canonical(tool, forX, forY);
if (ret != this) {
return ret;
}
if (forX.isConstant() && !forY.isConstant()) {
// we try to swap and canonicalize
ValueNode improvement = canonical(tool, forY, forX);
if (improvement != this) {
return improvement;
}
// if this fails we only swap
return new IntegerMulHighNode(forY, forX);
}
return canonical(this, forY);
}
private static ValueNode canonical(IntegerMulHighNode self, ValueNode forY) {
if (forY.isConstant()) {
Constant c = forY.asConstant();
if (c instanceof PrimitiveConstant && ((PrimitiveConstant) c).getJavaKind().isNumericInteger()) {
long i = ((PrimitiveConstant) c).asLong();
if (i == 0 || i == 1) {
return ConstantNode.forIntegerStamp(self.stamp(NodeView.DEFAULT), 0);
}
}
}
return self;
}
}