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| 1 | +// Copyright 2019 the V8 project authors. All rights reserved. |
| 2 | +// Use of this source code is governed by a BSD-style license that can be |
| 3 | +// found in the LICENSE file. |
| 4 | + |
| 5 | +#ifndef V8_OBJECTS_TAGGED_FIELD_INL_H_ |
| 6 | +#define V8_OBJECTS_TAGGED_FIELD_INL_H_ |
| 7 | + |
| 8 | +#include "src/objects/tagged-field.h" |
| 9 | + |
| 10 | +#include "src/common/ptr-compr-inl.h" |
| 11 | + |
| 12 | +namespace v8 { |
| 13 | +namespace internal { |
| 14 | + |
| 15 | +// static |
| 16 | +template <typename T, int kFieldOffset> |
| 17 | +Address TaggedField<T, kFieldOffset>::address(HeapObject host) { |
| 18 | + return host.address() + kFieldOffset; |
| 19 | +} |
| 20 | + |
| 21 | +// static |
| 22 | +template <typename T, int kFieldOffset> |
| 23 | +Tagged_t* TaggedField<T, kFieldOffset>::location(HeapObject host) { |
| 24 | + return reinterpret_cast<Tagged_t*>(address(host)); |
| 25 | +} |
| 26 | + |
| 27 | +// static |
| 28 | +template <typename T, int kFieldOffset> |
| 29 | +template <typename TOnHeapAddress> |
| 30 | +Address TaggedField<T, kFieldOffset>::tagged_to_full( |
| 31 | + TOnHeapAddress on_heap_addr, Tagged_t tagged_value) { |
| 32 | +#ifdef V8_COMPRESS_POINTERS |
| 33 | + if (kIsSmi) { |
| 34 | + return DecompressTaggedSigned(tagged_value); |
| 35 | + } else if (kIsHeapObject) { |
| 36 | + return DecompressTaggedPointer(on_heap_addr, tagged_value); |
| 37 | + } else { |
| 38 | + return DecompressTaggedAny(on_heap_addr, tagged_value); |
| 39 | + } |
| 40 | +#else |
| 41 | + return tagged_value; |
| 42 | +#endif |
| 43 | +} |
| 44 | + |
| 45 | +// static |
| 46 | +template <typename T, int kFieldOffset> |
| 47 | +Tagged_t TaggedField<T, kFieldOffset>::full_to_tagged(Address value) { |
| 48 | +#ifdef V8_COMPRESS_POINTERS |
| 49 | + return CompressTagged(value); |
| 50 | +#else |
| 51 | + return value; |
| 52 | +#endif |
| 53 | +} |
| 54 | + |
| 55 | +// static |
| 56 | +template <typename T, int kFieldOffset> |
| 57 | +T TaggedField<T, kFieldOffset>::load(HeapObject host) { |
| 58 | + Tagged_t value = *location(host); |
| 59 | + return T(tagged_to_full(host.ptr(), value)); |
| 60 | +} |
| 61 | + |
| 62 | +// static |
| 63 | +template <typename T, int kFieldOffset> |
| 64 | +T TaggedField<T, kFieldOffset>::load(Isolate* isolate, HeapObject host) { |
| 65 | + Tagged_t value = *location(host); |
| 66 | + return T(tagged_to_full(isolate, value)); |
| 67 | +} |
| 68 | + |
| 69 | +// static |
| 70 | +template <typename T, int kFieldOffset> |
| 71 | +void TaggedField<T, kFieldOffset>::store(HeapObject host, T value) { |
| 72 | + *location(host) = full_to_tagged(value.ptr()); |
| 73 | +} |
| 74 | + |
| 75 | +// static |
| 76 | +template <typename T, int kFieldOffset> |
| 77 | +T TaggedField<T, kFieldOffset>::Relaxed_Load(HeapObject host) { |
| 78 | + AtomicTagged_t value = AsAtomicTagged::Relaxed_Load(location(host)); |
| 79 | + return T(tagged_to_full(host.ptr(), value)); |
| 80 | +} |
| 81 | + |
| 82 | +// static |
| 83 | +template <typename T, int kFieldOffset> |
| 84 | +T TaggedField<T, kFieldOffset>::Relaxed_Load(Isolate* isolate, |
| 85 | + HeapObject host) { |
| 86 | + AtomicTagged_t value = AsAtomicTagged::Relaxed_Load(location(host)); |
| 87 | + return T(tagged_to_full(isolate, value)); |
| 88 | +} |
| 89 | + |
| 90 | +// static |
| 91 | +template <typename T, int kFieldOffset> |
| 92 | +void TaggedField<T, kFieldOffset>::Relaxed_Store(HeapObject host, T value) { |
| 93 | + AsAtomicTagged::Relaxed_Store(location(host), full_to_tagged(value.ptr())); |
| 94 | +} |
| 95 | + |
| 96 | +// static |
| 97 | +template <typename T, int kFieldOffset> |
| 98 | +T TaggedField<T, kFieldOffset>::Acquire_Load(HeapObject host) { |
| 99 | + AtomicTagged_t value = AsAtomicTagged::Acquire_Load(location(host)); |
| 100 | + return T(tagged_to_full(host.ptr(), value)); |
| 101 | +} |
| 102 | + |
| 103 | +// static |
| 104 | +template <typename T, int kFieldOffset> |
| 105 | +T TaggedField<T, kFieldOffset>::Acquire_Load(Isolate* isolate, |
| 106 | + HeapObject host) { |
| 107 | + AtomicTagged_t value = AsAtomicTagged::Acquire_Load(location(host)); |
| 108 | + return T(tagged_to_full(isolate, value)); |
| 109 | +} |
| 110 | + |
| 111 | +// static |
| 112 | +template <typename T, int kFieldOffset> |
| 113 | +void TaggedField<T, kFieldOffset>::Release_Store(HeapObject host, T value) { |
| 114 | + AsAtomicTagged::Release_Store(location(host), full_to_tagged(value.ptr())); |
| 115 | +} |
| 116 | + |
| 117 | +// static |
| 118 | +template <typename T, int kFieldOffset> |
| 119 | +Tagged_t TaggedField<T, kFieldOffset>::Release_CompareAndSwap(HeapObject host, |
| 120 | + T old, T value) { |
| 121 | + Tagged_t old_value = full_to_tagged(old.ptr()); |
| 122 | + Tagged_t new_value = full_to_tagged(value.ptr()); |
| 123 | + Tagged_t result = AsAtomicTagged::Release_CompareAndSwap( |
| 124 | + location(host), old_value, new_value); |
| 125 | + return result; |
| 126 | +} |
| 127 | + |
| 128 | +} // namespace internal |
| 129 | +} // namespace v8 |
| 130 | + |
| 131 | +#endif // V8_OBJECTS_TAGGED_FIELD_INL_H_ |
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