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 "B3Bank.h"
31#include "B3Type.h"
32
33#if ASSERT_DISABLED
34IGNORE_RETURN_TYPE_WARNINGS_BEGIN
35#endif
36
37namespace JSC { namespace B3 {
38
39enum Width : int8_t {
40 Width8,
41 Width16,
42 Width32,
43 Width64
44};
45
46inline Width pointerWidth()
47{
48 if (sizeof(void*) == 8)
49 return Width64;
50 return Width32;
51}
52
53// Don't use this unless the compiler forces you to.
54#if CPU(X86_64) || CPU(ARM64)
55#define POINTER_WIDTH Width64
56#else
57#define POINTER_WIDTH Width32
58#endif
59
60inline Width widthForType(Type type)
61{
62 switch (type.kind()) {
63 case Void:
64 case Tuple:
65 ASSERT_NOT_REACHED();
66 return Width8;
67 case Int32:
68 case Float:
69 return Width32;
70 case Int64:
71 case Double:
72 return Width64;
73 }
74 ASSERT_NOT_REACHED();
75 return Width8;
76}
77
78inline Width canonicalWidth(Width width)
79{
80 return std::max(Width32, width);
81}
82
83inline bool isCanonicalWidth(Width width)
84{
85 return width >= Width32;
86}
87
88Type bestType(Bank bank, Width width);
89
90inline Width conservativeWidth(Bank bank)
91{
92 return bank == GP ? pointerWidth() : Width64;
93}
94
95inline Width minimumWidth(Bank bank)
96{
97 return bank == GP ? Width8 : Width32;
98}
99
100inline unsigned bytes(Width width)
101{
102 return 1 << width;
103}
104
105inline Width widthForBytes(unsigned bytes)
106{
107 switch (bytes) {
108 case 0:
109 case 1:
110 return Width8;
111 case 2:
112 return Width16;
113 case 3:
114 case 4:
115 return Width32;
116 default:
117 return Width64;
118 }
119}
120
121inline uint64_t mask(Width width)
122{
123 switch (width) {
124 case Width8:
125 return 0x00000000000000ffllu;
126 case Width16:
127 return 0x000000000000ffffllu;
128 case Width32:
129 return 0x00000000ffffffffllu;
130 case Width64:
131 return 0xffffffffffffffffllu;
132 }
133 ASSERT_NOT_REACHED();
134}
135
136} } // namespace JSC::B3
137
138namespace WTF {
139
140class PrintStream;
141
142void printInternal(PrintStream&, JSC::B3::Width);
143
144} // namespace WTF
145
146#if ASSERT_DISABLED
147IGNORE_RETURN_TYPE_WARNINGS_END
148#endif
149
150#endif // ENABLE(B3_JIT)
151
152