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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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68 CODE_STUB_LIST_ALL(V) \ | 68 CODE_STUB_LIST_ALL(V) \ |
69 CODE_STUB_LIST_ARM(V) | 69 CODE_STUB_LIST_ARM(V) |
70 | 70 |
71 // Stub is base classes of all stubs. | 71 // Stub is base classes of all stubs. |
72 class CodeStub BASE_EMBEDDED { | 72 class CodeStub BASE_EMBEDDED { |
73 public: | 73 public: |
74 enum Major { | 74 enum Major { |
75 #define DEF_ENUM(name) name, | 75 #define DEF_ENUM(name) name, |
76 CODE_STUB_LIST(DEF_ENUM) | 76 CODE_STUB_LIST(DEF_ENUM) |
77 #undef DEF_ENUM | 77 #undef DEF_ENUM |
78 NoCache, // marker for stubs that do custom caching | |
79 NUMBER_OF_IDS | 78 NUMBER_OF_IDS |
80 }; | 79 }; |
81 | 80 |
82 // Retrieve the code for the stub. Generate the code if needed. | 81 // Retrieve the code for the stub. Generate the code if needed. |
83 Handle<Code> GetCode(); | 82 Handle<Code> GetCode(); |
84 | 83 |
85 static Major MajorKeyFromKey(uint32_t key) { | 84 static Major MajorKeyFromKey(uint32_t key) { |
86 return static_cast<Major>(MajorKeyBits::decode(key)); | 85 return static_cast<Major>(MajorKeyBits::decode(key)); |
87 }; | 86 }; |
88 static int MinorKeyFromKey(uint32_t key) { | 87 static int MinorKeyFromKey(uint32_t key) { |
89 return MinorKeyBits::decode(key); | 88 return MinorKeyBits::decode(key); |
90 }; | 89 }; |
91 static const char* MajorName(Major major_key); | 90 static const char* MajorName(Major major_key); |
92 | 91 |
93 virtual ~CodeStub() {} | 92 virtual ~CodeStub() {} |
94 | 93 |
95 // Override these methods to provide a custom caching mechanism for | |
96 // an individual type of code stub. | |
97 virtual bool GetCustomCache(Code** code_out) { return false; } | |
98 virtual void SetCustomCache(Code* value) { } | |
99 virtual bool has_custom_cache() { return false; } | |
100 | |
101 protected: | 94 protected: |
102 static const int kMajorBits = 5; | 95 static const int kMajorBits = 5; |
103 static const int kMinorBits = kBitsPerInt - kSmiTagSize - kMajorBits; | 96 static const int kMinorBits = kBitsPerInt - kSmiTagSize - kMajorBits; |
104 | 97 |
105 private: | 98 private: |
106 // Generates the assembler code for the stub. | 99 // Generates the assembler code for the stub. |
107 virtual void Generate(MacroAssembler* masm) = 0; | 100 virtual void Generate(MacroAssembler* masm) = 0; |
108 | 101 |
109 // Returns information for computing the number key. | 102 // Returns information for computing the number key. |
110 virtual Major MajorKey() = 0; | 103 virtual Major MajorKey() = 0; |
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132 | 125 |
133 class MajorKeyBits: public BitField<uint32_t, 0, kMajorBits> {}; | 126 class MajorKeyBits: public BitField<uint32_t, 0, kMajorBits> {}; |
134 class MinorKeyBits: public BitField<uint32_t, kMajorBits, kMinorBits> {}; | 127 class MinorKeyBits: public BitField<uint32_t, kMajorBits, kMinorBits> {}; |
135 | 128 |
136 friend class BreakPointIterator; | 129 friend class BreakPointIterator; |
137 }; | 130 }; |
138 | 131 |
139 } } // namespace v8::internal | 132 } } // namespace v8::internal |
140 | 133 |
141 #endif // V8_CODE_STUBS_H_ | 134 #endif // V8_CODE_STUBS_H_ |
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