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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package org.graalvm.compiler.nodes.calc;

import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_8;
import static org.graalvm.compiler.nodes.calc.BinaryArithmeticNode.getArithmeticOpTable;

import org.graalvm.compiler.core.common.calc.FloatConvert;
import org.graalvm.compiler.core.common.type.ArithmeticOpTable;
import org.graalvm.compiler.core.common.type.ArithmeticOpTable.FloatConvertOp;
import org.graalvm.compiler.core.common.type.ArithmeticOpTable.UnaryOp;
import org.graalvm.compiler.graph.NodeClass;
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.NodeView;
import org.graalvm.compiler.nodes.ValueNode;
import org.graalvm.compiler.nodes.spi.ArithmeticLIRLowerable;
import org.graalvm.compiler.nodes.spi.Lowerable;
import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;

import jdk.vm.ci.meta.Constant;
import jdk.vm.ci.meta.ConstantReflectionProvider;

A FloatConvert converts between integers and floating point numbers according to Java semantics.
/** * A {@code FloatConvert} converts between integers and floating point numbers according to Java * semantics. */
@NodeInfo(cycles = CYCLES_8) public final class FloatConvertNode extends UnaryArithmeticNode<FloatConvertOp> implements ConvertNode, Lowerable, ArithmeticLIRLowerable { public static final NodeClass<FloatConvertNode> TYPE = NodeClass.create(FloatConvertNode.class); protected final FloatConvert op; public FloatConvertNode(FloatConvert op, ValueNode input) { super(TYPE, getArithmeticOpTable(input).getFloatConvert(op), input); this.op = op; } public static ValueNode create(FloatConvert op, ValueNode input, NodeView view) { ValueNode synonym = findSynonym(input, ArithmeticOpTable.forStamp(input.stamp(view)).getFloatConvert(op)); if (synonym != null) { return synonym; } return new FloatConvertNode(op, input); } @Override protected UnaryOp<FloatConvertOp> getOp(ArithmeticOpTable table) { return table.getFloatConvert(op); } public FloatConvert getFloatConvert() { return op; } @Override public Constant convert(Constant c, ConstantReflectionProvider constantReflection) { return getArithmeticOp().foldConstant(c); } @Override public Constant reverse(Constant c, ConstantReflectionProvider constantReflection) { FloatConvertOp reverse = ArithmeticOpTable.forStamp(stamp(NodeView.DEFAULT)).getFloatConvert(op.reverse()); return reverse.foldConstant(c); } @Override public boolean isLossless() { switch (getFloatConvert()) { case F2D: case I2D: return true; default: return false; } } @Override public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) { ValueNode ret = super.canonical(tool, forValue); if (ret != this) { return ret; } if (forValue instanceof FloatConvertNode) { FloatConvertNode other = (FloatConvertNode) forValue; if (other.isLossless() && other.op == this.op.reverse()) { return other.getValue(); } } return this; } @Override public void generate(NodeLIRBuilderTool nodeValueMap, ArithmeticLIRGeneratorTool gen) { nodeValueMap.setResult(this, gen.emitFloatConvert(getFloatConvert(), nodeValueMap.operand(getValue()))); } @Override public boolean mayNullCheckSkipConversion() { return false; } }