Mercurial > hg > graal-jvmci-8
view graal/com.oracle.max.graal.compiler/src/com/oracle/max/graal/compiler/ir/Negate.java @ 3520:3e21ab23406b
changes CanonicalizerOp to Canonicalizable interface
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Tue, 09 Aug 2011 17:56:45 +0200 |
parents | dd26b98b9723 |
children | 6b841b6b2437 |
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/* * Copyright (c) 2009, 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.compiler.ir; import com.oracle.max.graal.compiler.debug.*; import com.oracle.max.graal.compiler.phases.CanonicalizerPhase.NotifyReProcess; import com.oracle.max.graal.compiler.phases.CanonicalizerPhase.*; import com.oracle.max.graal.graph.*; import com.sun.cri.ci.*; /** * The {@code NegateOp} instruction negates its operand. */ public final class Negate extends FloatingNode implements Canonicalizable { @Input private Value x; public Value x() { return x; } public void setX(Value x) { updateUsages(this.x, x); this.x = x; } /** * Creates new NegateOp instance. * * @param x the instruction producing the value that is input to this instruction */ public Negate(Value x, Graph graph) { super(x.kind, graph); setX(x); } // for copying private Negate(CiKind kind, Graph graph) { super(kind, graph); } @Override public void accept(ValueVisitor v) { v.visitNegate(this); } @Override public void print(LogStream out) { out.print("- ").print(x()); } @Override public Node canonical(NotifyReProcess reProcess) { if (x().isConstant()) { switch (x().kind) { case Int: return Constant.forInt(-x().asConstant().asInt(), graph()); case Long: return Constant.forLong(-x().asConstant().asLong(), graph()); case Float: return Constant.forFloat(-x().asConstant().asFloat(), graph()); case Double: return Constant.forDouble(-x().asConstant().asDouble(), graph()); } } if (x() instanceof Negate) { return ((Negate) x()).x(); } return this; } }