1/*
2 * Copyright (C) 2018 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28namespace JSC {
29
30enum OpcodeSize {
31 Narrow = 1,
32 Wide16 = 2,
33 Wide32 = 4,
34};
35
36template<OpcodeSize>
37struct TypeBySize;
38
39template<>
40struct TypeBySize<OpcodeSize::Narrow> {
41 using signedType = int8_t;
42 using unsignedType = uint8_t;
43};
44
45template<>
46struct TypeBySize<OpcodeSize::Wide16> {
47 using signedType = int16_t;
48 using unsignedType = uint16_t;
49};
50
51template<>
52struct TypeBySize<OpcodeSize::Wide32> {
53 using signedType = int32_t;
54 using unsignedType = uint32_t;
55};
56
57template<OpcodeSize>
58struct PaddingBySize;
59
60template<>
61struct PaddingBySize<OpcodeSize::Narrow> {
62 static constexpr uint8_t value = 0;
63};
64
65template<>
66struct PaddingBySize<OpcodeSize::Wide16> {
67 static constexpr uint8_t value = 1;
68};
69
70template<>
71struct PaddingBySize<OpcodeSize::Wide32> {
72 static constexpr uint8_t value = 1;
73};
74
75} // namespace JSC
76