1/*
2 * [The "BSD licence"]
3 * Copyright (c) 2010 Ben Gruver (JesusFreke)
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29package org.jf.dexlib.Code.Format;
30
31import org.jf.dexlib.Code.Instruction;
32import org.jf.dexlib.Code.Opcode;
33import org.jf.dexlib.Code.TwoRegisterInstruction;
34import org.jf.dexlib.DexFile;
35import org.jf.dexlib.Util.AnnotatedOutput;
36import org.jf.dexlib.Util.NumberUtils;
37
38public class Instruction32x extends Instruction implements TwoRegisterInstruction {
39    public static final Instruction.InstructionFactory Factory = new Factory();
40    private short regA;
41    private short regB;
42
43    public Instruction32x(Opcode opcode, int regA, int regB) {
44        super(opcode);
45
46        if (regA >= 1<<16 ||
47            regB >= 1<<16) {
48            throw new RuntimeException("The register number must be less than v65536");
49        }
50
51        this.regA = (short)regA;
52        this.regB = (short)regB;
53    }
54
55    private Instruction32x(Opcode opcode, byte[] buffer, int bufferIndex) {
56        super(opcode);
57
58        this.regA = (short)NumberUtils.decodeUnsignedShort(buffer, bufferIndex + 2);
59        this.regB = (short)NumberUtils.decodeUnsignedShort(buffer, bufferIndex + 4);
60    }
61
62    protected void writeInstruction(AnnotatedOutput out, int currentCodeAddress) {
63        out.writeByte(opcode.value);
64        out.writeByte(0);
65        out.writeShort(regA);
66        out.writeShort(regB);
67    }
68
69    public Format getFormat() {
70        return Format.Format32x;
71    }
72
73    public int getRegisterA() {
74        return regA & 0xFFFF;
75    }
76
77    public int getRegisterB() {
78        return regB & 0xFFFF;
79    }
80
81    private static class Factory implements Instruction.InstructionFactory {
82        public Instruction makeInstruction(DexFile dexFile, Opcode opcode, byte[] buffer, int bufferIndex) {
83            return new Instruction32x(opcode, buffer, bufferIndex);
84        }
85    }
86}
87