104 lines
2.7 KiB
Java
104 lines
2.7 KiB
Java
/*******************************************************************************
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* Copyright (c) 2002,2006 IBM Corporation.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package com.ibm.wala.shrikeBT;
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/**
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* This class represents unary operators where the result is the same type as
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* the operand.
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*/
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public final class UnaryOpInstruction extends Instruction {
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public interface IOperator {}
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public static enum Operator implements IOperator {
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NEG;
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@Override
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public String toString() {
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return super.toString().toLowerCase();
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}
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}
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protected UnaryOpInstruction(short opcode) {
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this.opcode = opcode;
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}
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private final static UnaryOpInstruction[] preallocated = preallocate();
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private static UnaryOpInstruction[] preallocate() {
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UnaryOpInstruction[] r = new UnaryOpInstruction[OP_dneg - OP_ineg + 1];
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for (int i = 0; i < r.length; i++) {
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r[i] = new UnaryOpInstruction((short) (OP_ineg + i));
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}
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return r;
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}
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public static UnaryOpInstruction make(String type, Operator operator) throws IllegalArgumentException {
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int t = Util.getTypeIndex(type);
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if (t < 0 || t > TYPE_double_index) {
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throw new IllegalArgumentException("Type " + type + " cannot have a unary operator applied");
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}
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return preallocated[t];
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}
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@Override
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public boolean equals(Object o) {
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if (o instanceof UnaryOpInstruction) {
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UnaryOpInstruction i = (UnaryOpInstruction) o;
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return i.opcode == opcode;
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} else {
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return false;
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}
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}
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public Operator getOperator() {
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return Operator.NEG;
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}
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@Override
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public int hashCode() {
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return opcode;
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}
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@Override
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public int getPoppedCount() {
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return 1;
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}
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@Override
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public String getPushedType(String[] types) {
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return getType();
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}
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@Override
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public byte getPushedWordSize() {
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return Util.getWordSize(getType());
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}
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public String getType() {
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return indexedTypes[opcode - OP_ineg];
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}
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@Override
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public void visit(Visitor v) throws NullPointerException {
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v.visitUnaryOp(this);
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}
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@Override
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public String toString() {
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return "UnaryOp(" + getType() + "," + getOperator() + ")";
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}
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/* (non-Javadoc)
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* @see com.ibm.domo.cfg.IInstruction#isPEI()
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*/
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public boolean isPEI() {
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return false;
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}
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} |