1 /*
   2  * Copyright (c) 2009, 2014, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 package org.graalvm.compiler.nodes.calc;
  24 
  25 import static org.graalvm.compiler.nodeinfo.NodeCycles.CYCLES_3;
  26 import static org.graalvm.compiler.nodeinfo.NodeSize.SIZE_1;
  27 
  28 import org.graalvm.compiler.core.common.type.ArithmeticOpTable;
  29 import org.graalvm.compiler.core.common.type.ArithmeticOpTable.UnaryOp.Abs;
  30 import org.graalvm.compiler.graph.NodeClass;
  31 import org.graalvm.compiler.graph.spi.CanonicalizerTool;
  32 import org.graalvm.compiler.lir.gen.ArithmeticLIRGeneratorTool;
  33 import org.graalvm.compiler.nodeinfo.NodeInfo;
  34 import org.graalvm.compiler.nodes.ValueNode;
  35 import org.graalvm.compiler.nodes.spi.ArithmeticLIRLowerable;
  36 import org.graalvm.compiler.nodes.spi.NodeLIRBuilderTool;
  37 
  38 /**
  39  * Absolute value.
  40  */
  41 @NodeInfo(cycles = CYCLES_3, size = SIZE_1)
  42 public final class AbsNode extends UnaryArithmeticNode<Abs> implements ArithmeticLIRLowerable, NarrowableArithmeticNode {
  43     public static final NodeClass<AbsNode> TYPE = NodeClass.create(AbsNode.class);
  44 
  45     public AbsNode(ValueNode x) {
  46         super(TYPE, ArithmeticOpTable::getAbs, x);
  47     }
  48 
  49     @Override
  50     public ValueNode canonical(CanonicalizerTool tool, ValueNode forValue) {
  51         ValueNode ret = super.canonical(tool, forValue);
  52         if (ret != this) {
  53             return ret;
  54         }
  55         if (forValue instanceof AbsNode) {
  56             return forValue;
  57         }
  58         return this;
  59     }
  60 
  61     @Override
  62     public void generate(NodeLIRBuilderTool nodeValueMap, ArithmeticLIRGeneratorTool gen) {
  63         nodeValueMap.setResult(this, gen.emitMathAbs(nodeValueMap.operand(getValue())));
  64     }
  65 }