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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 |
78 NUMBER_OF_IDS | 79 NUMBER_OF_IDS |
79 }; | 80 }; |
80 | 81 |
81 // Retrieve the code for the stub. Generate the code if needed. | 82 // Retrieve the code for the stub. Generate the code if needed. |
82 Handle<Code> GetCode(); | 83 Handle<Code> GetCode(); |
83 | 84 |
84 static Major MajorKeyFromKey(uint32_t key) { | 85 static Major MajorKeyFromKey(uint32_t key) { |
85 return static_cast<Major>(MajorKeyBits::decode(key)); | 86 return static_cast<Major>(MajorKeyBits::decode(key)); |
86 }; | 87 }; |
87 static int MinorKeyFromKey(uint32_t key) { | 88 static int MinorKeyFromKey(uint32_t key) { |
88 return MinorKeyBits::decode(key); | 89 return MinorKeyBits::decode(key); |
89 }; | 90 }; |
90 static const char* MajorName(Major major_key); | 91 static const char* MajorName(Major major_key); |
91 | 92 |
92 virtual ~CodeStub() {} | 93 virtual ~CodeStub() {} |
93 | 94 |
| 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 |
94 protected: | 101 protected: |
95 static const int kMajorBits = 5; | 102 static const int kMajorBits = 5; |
96 static const int kMinorBits = kBitsPerInt - kSmiTagSize - kMajorBits; | 103 static const int kMinorBits = kBitsPerInt - kSmiTagSize - kMajorBits; |
97 | 104 |
98 private: | 105 private: |
99 // Generates the assembler code for the stub. | 106 // Generates the assembler code for the stub. |
100 virtual void Generate(MacroAssembler* masm) = 0; | 107 virtual void Generate(MacroAssembler* masm) = 0; |
101 | 108 |
102 // Returns information for computing the number key. | 109 // Returns information for computing the number key. |
103 virtual Major MajorKey() = 0; | 110 virtual Major MajorKey() = 0; |
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125 | 132 |
126 class MajorKeyBits: public BitField<uint32_t, 0, kMajorBits> {}; | 133 class MajorKeyBits: public BitField<uint32_t, 0, kMajorBits> {}; |
127 class MinorKeyBits: public BitField<uint32_t, kMajorBits, kMinorBits> {}; | 134 class MinorKeyBits: public BitField<uint32_t, kMajorBits, kMinorBits> {}; |
128 | 135 |
129 friend class BreakPointIterator; | 136 friend class BreakPointIterator; |
130 }; | 137 }; |
131 | 138 |
132 } } // namespace v8::internal | 139 } } // namespace v8::internal |
133 | 140 |
134 #endif // V8_CODE_STUBS_H_ | 141 #endif // V8_CODE_STUBS_H_ |
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