Mercurial > hg > graal-jvmci-8
view graal/com.oracle.max.graal.nodes/src/com/oracle/max/graal/nodes/calc/XorNode.java @ 4309:4a609a685fa4
changes to Node structures:
* add more uses of higher-level graph manipulation methods
* CanonicalierPhase cleanup
* introduce FloatingReadNode, make ReadNode an ordinary fixed nodeToBlock
* let Canonicalizable.canonical return ValueNode (instead of Node)
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Tue, 17 Jan 2012 19:45:39 +0100 |
parents | aaac4894175c |
children |
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/* * Copyright (c) 2011, 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.max.graal.nodes.calc; import com.oracle.max.cri.ci.*; import com.oracle.max.graal.graph.*; import com.oracle.max.graal.nodes.*; import com.oracle.max.graal.nodes.spi.*; @NodeInfo(shortName = "^") public final class XorNode extends LogicNode implements Canonicalizable, LIRLowerable { public XorNode(CiKind kind, ValueNode x, ValueNode y) { super(kind, x, y); } @Override public ValueNode canonical(CanonicalizerTool tool) { if (x() == y()) { return ConstantNode.forIntegerKind(kind(), 0, graph()); } if (x().isConstant() && !y().isConstant()) { return graph().unique(new XorNode(kind(), y(), x())); } if (x().isConstant()) { if (kind() == CiKind.Int) { return ConstantNode.forInt(x().asConstant().asInt() ^ y().asConstant().asInt(), graph()); } else { assert kind() == CiKind.Long; return ConstantNode.forLong(x().asConstant().asLong() ^ y().asConstant().asLong(), graph()); } } else if (y().isConstant()) { if (kind() == CiKind.Int) { int c = y().asConstant().asInt(); if (c == 0) { return x(); } } else { assert kind() == CiKind.Long; long c = y().asConstant().asLong(); if (c == 0) { return x(); } } } return this; } @Override public void generate(LIRGeneratorTool gen) { gen.setResult(this, gen.emitXor(gen.operand(x()), gen.operand(y()))); } }