Mercurial > hg > truffle
view graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/ReinterpretNode.java @ 19526:8fc336a04d77
Create TYPE fields for LIRInstruction and CompositeValue. Renaming NodeClass#get to NodeClass#create.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 20 Feb 2015 22:22:55 +0100 |
parents | 61d3cb8e1280 |
children | 48c1ebd24120 |
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/* * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved. * 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 com.oracle.graal.nodes.calc; import java.nio.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.type.*; import com.oracle.graal.graph.*; import com.oracle.graal.graph.spi.*; import com.oracle.graal.lir.gen.*; import com.oracle.graal.nodeinfo.*; import com.oracle.graal.nodes.*; import com.oracle.graal.nodes.spi.*; /** * The {@code ReinterpretNode} class represents a reinterpreting conversion that changes the stamp * of a primitive value to some other incompatible stamp. The new stamp must have the same width as * the old stamp. */ @NodeInfo public final class ReinterpretNode extends UnaryNode implements ArithmeticLIRLowerable { public static final NodeClass<ReinterpretNode> TYPE = NodeClass.create(ReinterpretNode.class); public ReinterpretNode(Kind to, ValueNode value) { this(StampFactory.forKind(to), value); } public ReinterpretNode(Stamp to, ValueNode value) { super(TYPE, to, value); assert to instanceof ArithmeticStamp; } private SerializableConstant evalConst(SerializableConstant c) { /* * We don't care about byte order here. Either would produce the correct result. */ ByteBuffer buffer = ByteBuffer.wrap(new byte[c.getSerializedSize()]).order(ByteOrder.nativeOrder()); c.serialize(buffer); buffer.rewind(); SerializableConstant ret = ((ArithmeticStamp) stamp()).deserialize(buffer); assert !buffer.hasRemaining(); return ret; } @Override public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) { if (forValue.isConstant()) { return ConstantNode.forConstant(stamp(), evalConst((SerializableConstant) forValue.asConstant()), null); } if (stamp().isCompatible(forValue.stamp())) { return forValue; } if (forValue instanceof ReinterpretNode) { ReinterpretNode reinterpret = (ReinterpretNode) forValue; return new ReinterpretNode(stamp(), reinterpret.getValue()); } return this; } @Override public void generate(NodeMappableLIRBuilder builder, ArithmeticLIRGenerator gen) { LIRKind kind = gen.getLIRKind(stamp()); builder.setResult(this, gen.emitReinterpret(kind, builder.operand(getValue()))); } public static ValueNode reinterpret(Kind toKind, ValueNode value) { return value.graph().unique(new ReinterpretNode(toKind, value)); } @NodeIntrinsic public static native float reinterpret(@ConstantNodeParameter Kind kind, int value); @NodeIntrinsic public static native int reinterpret(@ConstantNodeParameter Kind kind, float value); @NodeIntrinsic public static native double reinterpret(@ConstantNodeParameter Kind kind, long value); @NodeIntrinsic public static native long reinterpret(@ConstantNodeParameter Kind kind, double value); }