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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_OBJECTS_COMPRESSED_SLOTS_INL_H_
#define V8_OBJECTS_COMPRESSED_SLOTS_INL_H_
#ifdef V8_COMPRESS_POINTERS
#include "src/objects/compressed-slots.h"
#include "src/objects/heap-object-inl.h"
#include "src/objects/maybe-object-inl.h"
#include "src/ptr-compr-inl.h"
namespace v8 {
namespace internal {
//
// CompressedObjectSlot implementation.
//
CompressedObjectSlot::CompressedObjectSlot(Object* object)
: SlotBase(reinterpret_cast<Address>(&object->ptr_)) {}
Object CompressedObjectSlot::operator*() const {
Tagged_t value = *location();
return Object(DecompressTaggedAny(address(), value));
}
void CompressedObjectSlot::store(Object value) const {
*location() = CompressTagged(value->ptr());
}
Object CompressedObjectSlot::Acquire_Load() const {
AtomicTagged_t value = AsAtomicTagged::Acquire_Load(location());
return Object(DecompressTaggedAny(address(), value));
}
Object CompressedObjectSlot::Relaxed_Load() const {
AtomicTagged_t value = AsAtomicTagged::Relaxed_Load(location());
return Object(DecompressTaggedAny(address(), value));
}
void CompressedObjectSlot::Relaxed_Store(Object value) const {
Tagged_t ptr = CompressTagged(value->ptr());
AsAtomicTagged::Relaxed_Store(location(), ptr);
}
void CompressedObjectSlot::Release_Store(Object value) const {
Tagged_t ptr = CompressTagged(value->ptr());
AsAtomicTagged::Release_Store(location(), ptr);
}
Object CompressedObjectSlot::Release_CompareAndSwap(Object old,
Object target) const {
Tagged_t old_ptr = CompressTagged(old->ptr());
Tagged_t target_ptr = CompressTagged(target->ptr());
Tagged_t result =
AsAtomicTagged::Release_CompareAndSwap(location(), old_ptr, target_ptr);
return Object(DecompressTaggedAny(address(), result));
}
//
// CompressedMapWordSlot implementation.
//
bool CompressedMapWordSlot::contains_value(Address raw_value) const {
AtomicTagged_t value = AsAtomicTagged::Relaxed_Load(location());
return static_cast<uint32_t>(value) ==
static_cast<uint32_t>(static_cast<Tagged_t>(raw_value));
}
Object CompressedMapWordSlot::operator*() const {
Tagged_t value = *location();
return Object(DecompressTaggedPointer(address(), value));
}
void CompressedMapWordSlot::store(Object value) const {
*location() = CompressTagged(value.ptr());
}
Object CompressedMapWordSlot::Relaxed_Load() const {
AtomicTagged_t value = AsAtomicTagged::Relaxed_Load(location());
return Object(DecompressTaggedPointer(address(), value));
}
void CompressedMapWordSlot::Relaxed_Store(Object value) const {
Tagged_t ptr = CompressTagged(value.ptr());
AsAtomicTagged::Relaxed_Store(location(), ptr);
}
Object CompressedMapWordSlot::Acquire_Load() const {
AtomicTagged_t value = AsAtomicTagged::Acquire_Load(location());
return Object(DecompressTaggedPointer(address(), value));
}
void CompressedMapWordSlot::Release_Store(Object value) const {
Tagged_t ptr = CompressTagged(value->ptr());
AsAtomicTagged::Release_Store(location(), ptr);
}
Object CompressedMapWordSlot::Release_CompareAndSwap(Object old,
Object target) const {
Tagged_t old_ptr = CompressTagged(old->ptr());
Tagged_t target_ptr = CompressTagged(target->ptr());
Tagged_t result =
AsAtomicTagged::Release_CompareAndSwap(location(), old_ptr, target_ptr);
return Object(DecompressTaggedPointer(address(), result));
}
//
// CompressedMaybeObjectSlot implementation.
//
MaybeObject CompressedMaybeObjectSlot::operator*() const {
Tagged_t value = *location();
return MaybeObject(DecompressTaggedAny(address(), value));
}
void CompressedMaybeObjectSlot::store(MaybeObject value) const {
*location() = CompressTagged(value->ptr());
}
MaybeObject CompressedMaybeObjectSlot::Relaxed_Load() const {
AtomicTagged_t value = AsAtomicTagged::Relaxed_Load(location());
return MaybeObject(DecompressTaggedAny(address(), value));
}
void CompressedMaybeObjectSlot::Relaxed_Store(MaybeObject value) const {
Tagged_t ptr = CompressTagged(value->ptr());
AsAtomicTagged::Relaxed_Store(location(), ptr);
}
void CompressedMaybeObjectSlot::Release_CompareAndSwap(
MaybeObject old, MaybeObject target) const {
Tagged_t old_ptr = CompressTagged(old->ptr());
Tagged_t target_ptr = CompressTagged(target->ptr());
AsAtomicTagged::Release_CompareAndSwap(location(), old_ptr, target_ptr);
}
//
// CompressedHeapObjectSlot implementation.
//
HeapObjectReference CompressedHeapObjectSlot::operator*() const {
Tagged_t value = *location();
return HeapObjectReference(DecompressTaggedPointer(address(), value));
}
void CompressedHeapObjectSlot::store(HeapObjectReference value) const {
*location() = CompressTagged(value.ptr());
}
HeapObject CompressedHeapObjectSlot::ToHeapObject() const {
Tagged_t value = *location();
DCHECK_EQ(value & kHeapObjectTagMask, kHeapObjectTag);
return HeapObject::cast(Object(DecompressTaggedPointer(address(), value)));
}
void CompressedHeapObjectSlot::StoreHeapObject(HeapObject value) const {
*location() = CompressTagged(value->ptr());
}
} // namespace internal
} // namespace v8
#endif // V8_COMPRESS_POINTERS
#endif // V8_OBJECTS_COMPRESSED_SLOTS_INL_H_
|
