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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/NotNode.java @ 16156:0993768dfc8e

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new UnaryNode base class
author Lukas Stadler <lukas.stadler@oracle.com>
date Mon, 23 Jun 2014 14:11:54 +0200
parents 60406b8d6ad1
children 388b787a5fe6
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Copyright (c) 2009, 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.graal.nodes.calc;
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24
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25 import com.oracle.graal.api.meta.*;
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26 import com.oracle.graal.compiler.common.type.*;
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27 import com.oracle.graal.graph.*;
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28 import com.oracle.graal.graph.spi.*;
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29 import com.oracle.graal.lir.gen.*;
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30 import com.oracle.graal.nodes.*;
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31 import com.oracle.graal.nodes.spi.*;
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32 import com.oracle.graal.nodes.type.*;
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33
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34 /**
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35 * Binary negation of long or integer values.
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36 */
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37 public final class NotNode extends UnaryNode implements Canonicalizable, ArithmeticLIRLowerable, NarrowableArithmeticNode {
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38
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39 @Override
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40 public boolean inferStamp() {
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41 return updateStamp(StampTool.not(getValue().stamp()));
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42 }
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43
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44 @Override
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45 public Constant evalConst(Constant... inputs) {
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46 assert inputs.length == 1;
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47 return Constant.forPrimitiveInt(PrimitiveStamp.getBits(stamp()), ~inputs[0].asLong());
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48 }
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49
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50 /**
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51 * Creates new NegateNode instance.
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52 *
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53 * @param x the instruction producing the value that is input to this instruction
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54 */
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55 public NotNode(ValueNode x) {
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56 super(StampTool.not(x.stamp()), x);
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57 }
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58
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59 @Override
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60 public Node canonical(CanonicalizerTool tool) {
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61 if (getValue().isConstant()) {
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62 return ConstantNode.forPrimitive(evalConst(getValue().asConstant()), graph());
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63 }
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64 if (getValue() instanceof NotNode) {
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65 return ((NotNode) getValue()).getValue();
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66 }
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67 return this;
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68 }
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69
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70 @Override
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71 public void generate(NodeMappableLIRBuilder builder, ArithmeticLIRGenerator gen) {
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72 builder.setResult(this, gen.emitNot(builder.operand(getValue())));
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73 }
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74 }