1 /*
   2  * Copyright 2003 Sun Microsystems, Inc.  All Rights Reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  20  * CA 95054 USA or visit www.sun.com if you need additional information or
  21  * have any questions.
  22  *
  23  */
  24 
  25 package sun.jvm.hotspot.asm.x86;
  26 
  27 import sun.jvm.hotspot.asm.*;
  28 
  29 public class X86ShiftInstruction extends X86Instruction implements ShiftInstruction {
  30    final private int operation;
  31    final private Operand operand1;
  32    final private ImmediateOrRegister operand2;
  33 
  34    public X86ShiftInstruction(String name, int operation, Operand operand1, ImmediateOrRegister operand2, int size, int prefixes) {
  35       super(name, size, prefixes);
  36       this.operand1 = operand1;
  37       this.operand2 = operand2;
  38       this.operation = operation;
  39    }
  40 
  41    public String asString(long currentPc, SymbolFinder symFinder) {
  42       StringBuffer buf = new StringBuffer();
  43       buf.append(getPrefixString());
  44       buf.append(getName());
  45       buf.append(spaces);
  46       buf.append(getOperandAsString(operand1));
  47 
  48       if(operand2 != null) {
  49          buf.append(comma);
  50 
  51          if ((operand2 instanceof Register)) {
  52             buf.append(operand2.toString());
  53          }
  54          else {
  55             Number number = ((Immediate)operand2).getNumber();
  56             buf.append("0x");
  57             buf.append(Integer.toHexString(number.intValue()));
  58          }
  59       }
  60       return buf.toString();
  61    }
  62 
  63    public int getOperation() {
  64       return operation;
  65    }
  66 
  67    public Operand getShiftDestination() {
  68       return operand1;
  69    }
  70 
  71    public Operand getShiftLength() {
  72       return operand2;
  73    }
  74 
  75    public Operand getShiftSource() {
  76       return operand1;
  77    }
  78 
  79    public boolean isShift() {
  80       return true;
  81    }
  82 
  83    protected String getOperand2String() {
  84       return operand2.toString();
  85    }
  86 }