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 SSEMoveDecoder extends SSEInstructionDecoder {
  30 
  31    public SSEMoveDecoder(String name, int addrMode1, int operandType1, int addrMode2, int operandType2) {
  32       super(name, addrMode1, operandType1, addrMode2, operandType2);
  33    }
  34 
  35    protected Instruction decodeInstruction(byte[] bytesArray, boolean operandSize, boolean addrSize, X86InstructionFactory factory) {
  36       Operand op1 = getOperand1(bytesArray, operandSize, addrSize);
  37       Operand op2 = getOperand2(bytesArray, operandSize, addrSize);
  38       int size = byteIndex - instrStartIndex;
  39 
  40       if( (op1 instanceof X86Register) && (op2 instanceof ImmediateOrRegister) ) {
  41          return factory.newMoveInstruction(name, (X86Register)op1, (ImmediateOrRegister)op2, size, 0);
  42       }
  43       else if( (op1 instanceof Address) && (op2 instanceof Immediate) ) {
  44          return factory.newGeneralInstruction(name, op1, op2, size, 0);
  45       }
  46       else if( (op1 instanceof Address) && (op2 instanceof X86Register) ) {
  47          return factory.newMoveStoreInstruction(name, (Address)op1, (X86Register)op2, 0, size, 0);
  48       }
  49       else if( (op1 instanceof X86Register) && (op2 instanceof Address) ) {
  50          return factory.newMoveLoadInstruction(name, (X86Register)op1, (Address)op2, 0, size, 0);
  51       }
  52 
  53       return null;
  54    }
  55 }