VariableSizeInsn.java revision 579d7739c53a2707ad711a2d2cae46d7d782f061 
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.dx.dex.code;
18
19import com.android.dx.rop.code.RegisterSpecList;
20import com.android.dx.rop.code.SourcePosition;
21
22/**
23 * Pseudo-instruction base class for variable-sized instructions.
24 */
25public abstract class VariableSizeInsn extends DalvInsn {
26    /**
27     * Constructs an instance. The output address of this instance is initially
28     * unknown ({@code -1}).
29     *
30     * @param position {@code non-null;} source position
31     * @param registers {@code non-null;} source registers
32     */
33    public VariableSizeInsn(SourcePosition position,
34                            RegisterSpecList registers) {
35        super(Dops.SPECIAL_FORMAT, position, registers);
36    }
37
38    /** {@inheritDoc} */
39    @Override
40    public final DalvInsn withOpcode(Dop opcode) {
41        throw new RuntimeException("unsupported");
42    }
43
44    /** {@inheritDoc} */
45    @Override
46    public final DalvInsn withRegisterOffset(int delta) {
47        return withRegisters(getRegisters().withOffset(delta));
48    }
49}
50