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annotate graal/GraalCompiler/src/com/sun/c1x/ir/ArithmeticOp.java @ 2603:01c5c0443158

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new node layout: Phi
author Lukas Stadler <lukas.stadler@jku.at>
date Fri, 06 May 2011 11:18:15 +0200
parents 51ebe5f0516f
children 3558ca7088c0
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1 /*
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2 * Copyright (c) 2009, 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.sun.c1x.ir;
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24
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25 import com.oracle.graal.graph.*;
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26 import com.sun.c1x.debug.*;
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27 import com.sun.c1x.value.*;
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28 import com.sun.cri.bytecode.*;
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29 import com.sun.cri.ci.*;
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30
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31 /**
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32 * The {@code ArithmeticOp} class represents arithmetic operations such as addition, subtraction, etc.
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33 */
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34 public final class ArithmeticOp extends Op2 {
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35
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36 private static final int INPUT_COUNT = 0;
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37 private static final int SUCCESSOR_COUNT = 0;
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38
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39 private final FrameState stateBefore;
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40 private final boolean isStrictFP;
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41
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42 /**
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43 * Creates a new arithmetic operation.
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44 * @param opcode the bytecode opcode
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45 * @param kind the result kind of the operation
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46 * @param x the first input instruction
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47 * @param y the second input instruction
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48 * @param isStrictFP indicates this operation has strict rounding semantics
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49 * @param stateBefore the state for instructions that may trap
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50 */
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51 public ArithmeticOp(int opcode, CiKind kind, Value x, Value y, boolean isStrictFP, FrameState stateBefore, Graph graph) {
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52 super(kind, opcode, x, y, INPUT_COUNT, SUCCESSOR_COUNT, graph);
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53 this.isStrictFP = isStrictFP;
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54 this.stateBefore = stateBefore;
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55 }
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56
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57 @Override
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58 public FrameState stateBefore() {
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59 return stateBefore;
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60 }
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61
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62 /**
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63 * Checks whether this instruction has strict fp semantics.
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64 * @return {@code true} if this instruction has strict fp semantics
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65 */
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66 public boolean isStrictFP() {
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67 return isStrictFP;
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68 }
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69
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70 /**
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71 * Checks whether this instruction can cause a trap. For arithmetic operations,
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72 * only division and remainder operations can cause traps.
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73 * @return {@code true} if this instruction can cause a trap
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74 */
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75 @Override
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76 public boolean canTrap() {
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77 return stateBefore != null;
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78 }
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79
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80 @Override
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81 public void accept(ValueVisitor v) {
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82 v.visitArithmeticOp(this);
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83 }
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84
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85 public boolean isCommutative() {
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86 return Bytecodes.isCommutative(opcode);
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87 }
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88
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89 @Override
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90 public void print(LogStream out) {
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91 out.print(x()).print(' ').print(Bytecodes.operator(opcode)).print(' ').print(y());
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92 }
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93 }