001    /*
002     *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003     *
004     *  This file is licensed to You under the Eclipse Public License (EPL);
005     *  You may not use this file except in compliance with the License. You
006     *  may obtain a copy of the License at
007     *
008     *      http://www.opensource.org/licenses/eclipse-1.0.php
009     *
010     *  See the COPYRIGHT.txt file distributed with this work for information
011     *  regarding copyright ownership.
012     */
013    package org.jikesrvm.compilers.opt.ir.operand.ia32;
014    
015    import org.jikesrvm.compilers.opt.ir.operand.Operand;
016    
017    /**
018     * An FPR register that BURS is managing.
019     * Created by a fld, and then eventually
020     * deallocated with some popping alu/store.
021     */
022    public final class BURSManagedFPROperand extends Operand {
023      public int regNum;
024    
025      public BURSManagedFPROperand(int r) {
026        regNum = r;
027      }
028    
029      /**
030       * Returns a copy of the current operand.
031       */
032      public Operand copy() {
033        return new BURSManagedFPROperand(regNum);
034      }
035    
036      /**
037       * Returns if this operand is the 'same' as another operand.
038       *
039       * @param op other operand
040       */
041      public boolean similar(Operand op) {
042        return (op instanceof BURSManagedFPROperand) && ((BURSManagedFPROperand) op).regNum == regNum;
043      }
044    
045      // Returns the string representation of this operand.
046      public String toString() {
047        return "ST(" + regNum + ")";
048      }
049    
050    }