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comparison agent/src/share/classes/sun/jvm/hotspot/asm/x86/MoveDecoder.java @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2002-2003 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 MoveDecoder extends InstructionDecoder {
30 public MoveDecoder(String name, int addrMode1, int operandType1, int addrMode2, int operandType2) {
31 super(name, addrMode1, operandType1, addrMode2, operandType2);
32 }
33
34 protected Instruction decodeInstruction(byte[] bytesArray, boolean operandSize, boolean addrSize, X86InstructionFactory factory) {
35 Operand op1 = getOperand1(bytesArray, operandSize, addrSize);
36 Operand op2 = getOperand2(bytesArray, operandSize, addrSize);
37 int size = byteIndex - instrStartIndex;
38
39 if( (op1 instanceof X86Register) && (op2 instanceof ImmediateOrRegister) ) {
40 return factory.newMoveInstruction(name, (X86Register)op1, (ImmediateOrRegister)op2, size, prefixes);
41 }
42 else if( (op1 instanceof Address) && (op2 instanceof Immediate) ) {
43 return factory.newGeneralInstruction(name, op1, op2, size, prefixes);
44 }
45 else if( (op1 instanceof Address) && (op2 instanceof X86Register) ) {
46 return factory.newMoveStoreInstruction(name, (Address)op1, (X86Register)op2, 0, size, prefixes);
47 }
48 else if( (op1 instanceof X86Register) && (op2 instanceof Address) ) {
49 return factory.newMoveLoadInstruction(name, (X86Register)op1, (Address)op2, 0, size, prefixes);
50 }
51
52 return null;
53 }
54 }