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annotate graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/FloatAddNode.java @ 11881:da9db8331658

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moved Canonicalizable and Simplifiable to the com.oracle.graal.graph project (GRAAL-506)
author Doug Simon <doug.simon@oracle.com>
date Tue, 01 Oct 2013 20:38:25 +0200
parents 9a747d8e0d0f
children 673f93db4adc
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1 /*
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2 * Copyright (c) 2011, 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.graph.*;
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27 import com.oracle.graal.graph.spi.*;
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28 import com.oracle.graal.nodes.*;
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29 import com.oracle.graal.nodes.spi.*;
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30
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31 @NodeInfo(shortName = "+")
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32 public final class FloatAddNode extends FloatArithmeticNode implements Canonicalizable {
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33
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34 public FloatAddNode(Kind kind, ValueNode x, ValueNode y, boolean isStrictFP) {
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35 super(kind, x, y, isStrictFP);
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36 }
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37
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38 @Override
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39 public Node canonical(CanonicalizerTool tool) {
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40 if (x().isConstant() && !y().isConstant()) {
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41 return graph().unique(new FloatAddNode(kind(), y(), x(), isStrictFP()));
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42 }
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43 if (x().isConstant()) {
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44 if (kind() == Kind.Float) {
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45 return ConstantNode.forFloat(x().asConstant().asFloat() + y().asConstant().asFloat(), graph());
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46 } else {
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47 assert kind() == Kind.Double;
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48 return ConstantNode.forDouble(x().asConstant().asDouble() + y().asConstant().asDouble(), graph());
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49 }
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50 } else if (y().isConstant()) {
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51 if (kind() == Kind.Float) {
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52 float c = y().asConstant().asFloat();
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53 if (c == 0.0f) {
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54 return x();
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55 }
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56 } else {
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57 assert kind() == Kind.Double;
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58 double c = y().asConstant().asDouble();
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59 if (c == 0.0) {
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60 return x();
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61 }
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62 }
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63 }
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64 return this;
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65 }
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66
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67 @Override
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68 public void generate(ArithmeticLIRGenerator gen) {
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69 Value op1 = gen.operand(x());
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70 Value op2 = gen.operand(y());
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71 if (!y().isConstant() && !livesLonger(this, y(), gen)) {
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72 Value op = op1;
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73 op1 = op2;
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74 op2 = op;
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75 }
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76 gen.setResult(this, gen.emitAdd(op1, op2));
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77 }
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78
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79 public static boolean livesLonger(ValueNode after, ValueNode value, ArithmeticLIRGenerator gen) {
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80 for (Node usage : value.usages()) {
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81 if (usage != after && usage instanceof ValueNode && gen.operand(((ValueNode) usage)) != null) {
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82 return true;
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83 }
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84 }
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85 return false;
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86 }
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87 }