1/*
2 * Copyright (C) 2010 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 dalvik.bytecode;
18
19/**
20 * Information about Dalvik opcodes.
21 */
22public final class OpcodeInfo {
23    /**
24     * The maximum possible value of a Dalvik opcode.
25     *
26     * <p><b>Note:</b>: This is constant in any given VM incarnation,
27     * but it is subject to change over time, so it is not appropriate
28     * to represent as a compile-time constant value.</p>
29     */
30    public static final int MAXIMUM_VALUE;
31
32    /**
33     * The maximum possible "packed value" of a Dalvik opcode. The
34     * packed value of an opcode is a denser representation that is
35     * only used when reporting usage statistics. The mapping between
36     * packed opcode values and regular opcode values is
37     * implementation-specific and may vary over time.
38     *
39     * <p><b>Note:</b>: This is constant in any given VM incarnation,
40     * but it is subject to change over time, so it is not appropriate
41     * to represent as a compile-time constant value.</p>
42     */
43    public static final int MAXIMUM_PACKED_VALUE;
44
45    static {
46        /*
47         * See note on the definition of MAXIMUM_VALUE, above, for
48         * why it's not assigned directly on the declaration line.
49         *
50         * IMPORTANT NOTE: This assignment is generated automatically
51         * by the opcode-gen tool. Any edits will get wiped out the
52         * next time the tool is run.
53         */
54        // BEGIN(libcore-maximum-values); GENERATED AUTOMATICALLY BY opcode-gen
55        MAXIMUM_VALUE = 65535;
56        MAXIMUM_PACKED_VALUE = 255;
57        // END(libcore-maximum-values)
58    }
59
60    /**
61     * Backwards compatibility stub for obsolete interpreter functionality.
62     * @hide
63     */
64    public static boolean isInvoke(int packedOpcode) {
65        return false;
66    }
67
68    /**
69     * This class is not instantiable.
70     */
71    private OpcodeInfo() {
72        // This space intentionally left blank.
73    }
74}
75