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https://gitee.com/openharmony/arkcompiler_ets_runtime
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b50494ca31
Description:add FindElementWithCache IR Issue:https://gitee.com/openharmony/arkcompiler_ets_runtime/issues/I89F9E?from=project-issue Signed-off-by: wupengyong <wupengyong@huawei.com> Change-Id: I357c22e119de8025fd1193a37c90501a7c8b4327
120 lines
3.9 KiB
C++
120 lines
3.9 KiB
C++
/*
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* Copyright (c) 2021 Huawei Device Co., Ltd.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ECMASCRIPT_IC_PROPERTIES_CACHE_H
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#define ECMASCRIPT_IC_PROPERTIES_CACHE_H
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#include <array>
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#include "ecmascript/js_hclass.h"
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#include "ecmascript/js_tagged_value.h"
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#include "ecmascript/ecma_macros.h"
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namespace panda::ecmascript {
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class EcmaVM;
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class PropertiesCache {
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public:
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inline int Get(JSHClass *jsHclass, JSTaggedValue key)
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{
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int hash = Hash(jsHclass, key);
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PropertyKey &prop = keys_[hash];
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if ((prop.hclass_ == jsHclass) && (prop.key_ == key)) {
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return keys_[hash].results_;
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}
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return NOT_FOUND;
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}
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inline void Set(JSHClass *jsHclass, JSTaggedValue key, int index)
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{
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int hash = Hash(jsHclass, key);
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PropertyKey &prop = keys_[hash];
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prop.hclass_ = jsHclass;
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prop.key_ = key;
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keys_[hash].results_ = index;
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}
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inline void Clear()
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{
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for (auto &key : keys_) {
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key.hclass_ = nullptr;
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}
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}
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static const int NOT_FOUND = -1;
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static const uint32_t CACHE_LENGTH_BIT = 10;
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static const uint32_t CACHE_LENGTH = (1U << CACHE_LENGTH_BIT);
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static const uint32_t CACHE_LENGTH_MASK = CACHE_LENGTH - 1;
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struct PropertyKey : public base::AlignedStruct<JSTaggedValue::TaggedTypeSize(),
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base::AlignedPointer,
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JSTaggedValue,
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base::AlignedUint32> {
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enum class Index : size_t {
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HclassIndex = 0,
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KeyIndex,
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ResultsIndex,
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NumOfMembers
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};
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static size_t GetHclassOffset(bool isArch32 = false)
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{
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return GetOffset<static_cast<size_t>(Index::HclassIndex)>(isArch32);
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}
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static size_t GetKeyOffset(bool isArch32 = false)
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{
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return GetOffset<static_cast<size_t>(Index::KeyIndex)>(isArch32);
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}
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static size_t GetResultsOffset(bool isArch32 = false)
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{
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return GetOffset<static_cast<size_t>(Index::ResultsIndex)>(isArch32);
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}
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static size_t GetPropertyKeySize()
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{
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return static_cast<size_t>(Index::NumOfMembers) * static_cast<size_t>(JSTaggedValue::TaggedTypeSize());
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}
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static_assert(static_cast<size_t>(Index::NumOfMembers) == NumOfTypes);
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alignas(EAS) JSHClass *hclass_ {nullptr};
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alignas(EAS) JSTaggedValue key_ {JSTaggedValue::Hole()};
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alignas(EAS) int results_ {NOT_FOUND};
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};
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private:
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PropertiesCache()
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{
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for (uint32_t i = 0; i < CACHE_LENGTH; ++i) {
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keys_[i].hclass_ = nullptr;
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keys_[i].key_ = JSTaggedValue::Hole();
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keys_[i].results_ = NOT_FOUND;
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}
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}
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~PropertiesCache() = default;
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// NOLINTNEXTLINE(cppcoreguidelines-pro-type-member-init)
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static inline int Hash(JSHClass *cls, JSTaggedValue key)
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{
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uint32_t clsHash = static_cast<uint32_t>(reinterpret_cast<uintptr_t>(cls)) >> 3U; // skip 8bytes
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uint32_t keyHash = key.GetKeyHashCode();
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return static_cast<int>((clsHash ^ keyHash) & CACHE_LENGTH_MASK);
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}
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std::array<PropertyKey, CACHE_LENGTH> keys_{};
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friend class EcmaContext;
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};
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} // namespace panda::ecmascript
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#endif // ECMASCRIPT_IC_PROPERTIES_CACHE_H
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