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 * Instruction which has no extra info beyond the basics provided for in
24 * the base class.
25 */
26public final class SimpleInsn extends FixedSizeInsn {
27    /**
28     * Constructs an instance. The output address of this instance is initially
29     * unknown ({@code -1}).
30     *
31     * @param opcode the opcode; one of the constants from {@link Dops}
32     * @param position {@code non-null;} source position
33     * @param registers {@code non-null;} register list, including a
34     * result register if appropriate (that is, registers may be either
35     * ins or outs)
36     */
37    public SimpleInsn(Dop opcode, SourcePosition position,
38                      RegisterSpecList registers) {
39        super(opcode, position, registers);
40    }
41
42    /** {@inheritDoc} */
43    @Override
44    public DalvInsn withOpcode(Dop opcode) {
45        return new SimpleInsn(opcode, getPosition(), getRegisters());
46    }
47
48    /** {@inheritDoc} */
49    @Override
50    public DalvInsn withRegisters(RegisterSpecList registers) {
51        return new SimpleInsn(getOpcode(), getPosition(), registers);
52    }
53
54    /** {@inheritDoc} */
55    @Override
56    protected String argString() {
57        return null;
58    }
59}
60