1 /* |
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2 * Copyright (c) 2002, 2003, 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 */ |
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24 |
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25 package sun.jvm.hotspot.asm.x86; |
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26 |
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27 import sun.jvm.hotspot.asm.*; |
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28 |
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29 public class MoveDecoder extends InstructionDecoder { |
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30 public MoveDecoder(String name, int addrMode1, int operandType1, int addrMode2, int operandType2) { |
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31 super(name, addrMode1, operandType1, addrMode2, operandType2); |
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32 } |
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33 |
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34 protected Instruction decodeInstruction(byte[] bytesArray, boolean operandSize, boolean addrSize, X86InstructionFactory factory) { |
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35 Operand op1 = getOperand1(bytesArray, operandSize, addrSize); |
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36 Operand op2 = getOperand2(bytesArray, operandSize, addrSize); |
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37 int size = byteIndex - instrStartIndex; |
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38 |
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39 if( (op1 instanceof X86Register) && (op2 instanceof ImmediateOrRegister) ) { |
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40 return factory.newMoveInstruction(name, (X86Register)op1, (ImmediateOrRegister)op2, size, prefixes); |
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41 } |
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42 else if( (op1 instanceof Address) && (op2 instanceof Immediate) ) { |
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43 return factory.newGeneralInstruction(name, op1, op2, size, prefixes); |
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44 } |
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45 else if( (op1 instanceof Address) && (op2 instanceof X86Register) ) { |
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46 return factory.newMoveStoreInstruction(name, (Address)op1, (X86Register)op2, 0, size, prefixes); |
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47 } |
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48 else if( (op1 instanceof X86Register) && (op2 instanceof Address) ) { |
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49 return factory.newMoveLoadInstruction(name, (X86Register)op1, (Address)op2, 0, size, prefixes); |
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50 } |
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51 |
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52 return null; |
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53 } |
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54 } |
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