1/*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#ifndef ECMASCRIPT_COMPILER_BUILTINS_CONTAINERS_QUEUE_STUB_BUILDER_H
17#define ECMASCRIPT_COMPILER_BUILTINS_CONTAINERS_QUEUE_STUB_BUILDER_H
18#include "ecmascript/compiler/stub_builder-inl.h"
19#include "ecmascript/js_api/js_api_queue.h"
20
21namespace panda::ecmascript::kungfu {
22class ContainersQueueStubBuilder : public StubBuilder {
23public:
24    explicit ContainersQueueStubBuilder(StubBuilder *parent)
25        : StubBuilder(parent) {}
26    ~ContainersQueueStubBuilder() override = default;
27    NO_MOVE_SEMANTIC(ContainersQueueStubBuilder);
28    NO_COPY_SEMANTIC(ContainersQueueStubBuilder);
29    void GenerateCircuit() override {}
30
31    GateRef GetArrayLength(GateRef obj)
32    {
33        auto env = GetEnvironment();
34        Label entry(env);
35        env->SubCfgEntry(&entry);
36        Label exit(env);
37        Label endGreatBeging(env);
38        Label endNotGreatBeging(env);
39        DEFVARIABLE(length, VariableType::INT32(), Int32(0));
40        GateRef begin = Load(VariableType::INT32(), obj, IntPtr(JSAPIQueue::FRONT_OFFSET));
41        GateRef end = Load(VariableType::INT32(), obj, IntPtr(JSAPIQueue::TAIL_OFFSET));
42        BRANCH(Int32GreaterThanOrEqual(end, begin), &endGreatBeging, &endNotGreatBeging);
43        Bind(&endGreatBeging);
44        {
45            length = Int32Sub(end, begin);
46            Jump(&exit);
47        }
48        Bind(&endNotGreatBeging);
49        {
50            GateRef elementsOffset = IntPtr(JSObject::ELEMENTS_OFFSET);
51            GateRef elements = Load(VariableType::JS_POINTER(), obj, elementsOffset);
52            GateRef elementsSize = Load(VariableType::INT32(), elements, IntPtr(TaggedArray::LENGTH_OFFSET));
53            length = Int32Add(Int32Sub(end, begin), elementsSize);
54            Jump(&exit);
55        }
56        Bind(&exit);
57        auto ret = *length;
58        env->SubCfgExit();
59        return ret;
60    }
61
62    GateRef Get(GateRef obj, GateRef index)
63    {
64        GateRef elementsOffset = IntPtr(JSObject::ELEMENTS_OFFSET);
65        GateRef elements = Load(VariableType::JS_POINTER(), obj, elementsOffset);
66        GateRef capacity = Load(VariableType::INT32(), elements, IntPtr(TaggedArray::LENGTH_OFFSET));
67        GateRef front = Load(VariableType::INT32(), obj, IntPtr(JSAPIQueue::FRONT_OFFSET));
68        GateRef curIndex = Int32Mod(Int32Add(front, index), capacity);
69        return GetValueFromTaggedArray(elements, curIndex);
70    }
71
72    GateRef GetNextPosition(GateRef obj, GateRef index)
73    {
74        GateRef elementsOffset = IntPtr(JSObject::ELEMENTS_OFFSET);
75        GateRef elements = Load(VariableType::JS_POINTER(), obj, elementsOffset);
76        GateRef elementsSize = Load(VariableType::INT32(), elements, IntPtr(TaggedArray::LENGTH_OFFSET));
77        return Int32Mod(Int32Add(index, Int32(1)), elementsSize);
78    }
79
80    GateRef GetCurrentFront(GateRef obj)
81    {
82        return Load(VariableType::INT32(), obj, IntPtr(JSAPIQueue::FRONT_OFFSET));
83    }
84};
85}  // namespace panda::ecmascript::kungfu
86#endif  // ECMASCRIPT_COMPILER_BUILTINS_CONTAINERS_QUEUE_STUB_BUILDER_H