forked from WebKit/WebKit
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathWasmBranchHints.h
More file actions
80 lines (66 loc) · 2.27 KB
/
WasmBranchHints.h
File metadata and controls
80 lines (66 loc) · 2.27 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
/*
* Copyright (C) 2022 Leaning Technologies Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <wtf/HashMap.h>
namespace JSC {
namespace Wasm {
enum class BranchHint : uint8_t {
Unlikely,
Likely,
Invalid,
};
class BranchHintMap {
public:
void add(uint32_t branchOffset, BranchHint hint)
{
m_map.add(branchOffset, hint);
}
BranchHint getBranchHint(uint32_t branchOffset) const
{
auto it = m_map.find(branchOffset);
if (it == m_map.end())
return BranchHint::Invalid;
return it->value;
}
bool isValidKey(uint32_t branchOffset) const
{
return m_map.isValidKey(branchOffset);
}
private:
HashMap<uint32_t, BranchHint, IntHash<uint32_t>, WTF::UnsignedWithZeroKeyHashTraits<uint32_t>> m_map;
};
inline constexpr bool isValidBranchHint(BranchHint hint)
{
switch (hint) {
case BranchHint::Likely:
case BranchHint::Unlikely:
return true;
default:
return false;
}
return false;
}
}
} // namespace JSC::Wasm