1/*
2 * Copyright (C) 2017 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
28#if ENABLE(B3_JIT)
29
30#include "AirArg.h"
31
32namespace JSC { namespace B3 { namespace Air {
33
34static const uint8_t formRoleShift = 0;
35static const uint8_t formRoleMask = 15;
36static const uint8_t formBankShift = 4;
37static const uint8_t formBankMask = 1;
38static const uint8_t formWidthShift = 5;
39static const uint8_t formWidthMask = 3;
40static const uint8_t formInvalidShift = 7;
41
42#define ENCODE_INST_FORM(role, bank, width) (static_cast<uint8_t>(role) << formRoleShift | static_cast<uint8_t>(bank) << formBankShift | static_cast<uint8_t>(width) << formWidthShift)
43
44#define INVALID_INST_FORM (1 << formInvalidShift)
45
46JS_EXPORT_PRIVATE extern const uint8_t g_formTable[];
47
48inline Arg::Role decodeFormRole(uint8_t value)
49{
50 return static_cast<Arg::Role>((value >> formRoleShift) & formRoleMask);
51}
52
53inline Bank decodeFormBank(uint8_t value)
54{
55 return static_cast<Bank>((value >> formBankShift) & formBankMask);
56}
57
58inline Width decodeFormWidth(uint8_t value)
59{
60 return static_cast<Width>((value >> formWidthShift) & formWidthMask);
61}
62
63} } } // namespace JSC::B3::Air
64
65#endif // ENABLE(B3_JIT)
66
67