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annotate graal/GraalCompiler/src/com/sun/c1x/ir/ArithmeticOp.java @ 2616:3558ca7088c0

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FrameState and Graphviz changes: * removed popx, pushx methods from GraphBuilder * FrameState subclass of Value * added String shortName() to Node * added GraphvizPrinter option to use short names * small hack in GraphvizPrinter: omit FrameState->Local connections * added GraalGraphviz to implicit classpatch (read from GRAAL env var)
author Lukas Stadler <lukas.stadler@jku.at>
date Mon, 09 May 2011 17:00:25 +0200
parents 51ebe5f0516f
children 91d3952f7eb7
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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 = 1;
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37 private static final int INPUT_STATE_BEFORE = 0;
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38
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39 private static final int SUCCESSOR_COUNT = 0;
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40
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41 @Override
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42 protected int inputCount() {
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43 return super.inputCount() + INPUT_COUNT;
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44 }
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45
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46 @Override
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47 protected int successorCount() {
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48 return super.successorCount() + SUCCESSOR_COUNT;
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49 }
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50
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51 /**
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52 * The state for this instruction.
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53 */
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54 @Override
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55 public FrameState stateBefore() {
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56 return (FrameState) inputs().get(super.inputCount() + INPUT_STATE_BEFORE);
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57 }
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58
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59 private FrameState setStateBefore(FrameState n) {
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60 return (FrameState) inputs().set(super.inputCount() + INPUT_STATE_BEFORE, n);
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61 }
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62
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63 private final boolean isStrictFP;
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64
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65 /**
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66 * Creates a new arithmetic operation.
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67 * @param opcode the bytecode opcode
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68 * @param kind the result kind of the operation
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69 * @param x the first input instruction
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70 * @param y the second input instruction
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71 * @param isStrictFP indicates this operation has strict rounding semantics
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72 * @param stateBefore the state for instructions that may trap
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73 */
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74 public ArithmeticOp(int opcode, CiKind kind, Value x, Value y, boolean isStrictFP, FrameState stateBefore, Graph graph) {
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75 super(kind, opcode, x, y, INPUT_COUNT, SUCCESSOR_COUNT, graph);
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76 this.isStrictFP = isStrictFP;
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77 setStateBefore(stateBefore);
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78 }
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79
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80 /**
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81 * Checks whether this instruction has strict fp semantics.
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82 * @return {@code true} if this instruction has strict fp semantics
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83 */
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84 public boolean isStrictFP() {
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85 return isStrictFP;
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86 }
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87
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88 /**
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89 * Checks whether this instruction can cause a trap. For arithmetic operations,
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90 * only division and remainder operations can cause traps.
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91 * @return {@code true} if this instruction can cause a trap
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92 */
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93 @Override
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94 public boolean canTrap() {
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95 return stateBefore() != null;
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96 }
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97
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98 @Override
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99 public void accept(ValueVisitor v) {
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100 v.visitArithmeticOp(this);
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101 }
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102
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103 public boolean isCommutative() {
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104 return Bytecodes.isCommutative(opcode);
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105 }
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106
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107 @Override
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108 public void print(LogStream out) {
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109 out.print(x()).print(' ').print(Bytecodes.operator(opcode)).print(' ').print(y());
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110 }
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111
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112 @Override
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113 public String shortName() {
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114 return Bytecodes.operator(opcode);
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115 }
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116 }