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Side by Side Diff: src/code-stubs.h

Issue 10701106: Make room in Code flags to support compiled stubs. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Remove whitespace Created 8 years, 5 months ago
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1 // Copyright 2012 the V8 project authors. All rights reserved. 1 // Copyright 2012 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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154 // GC. This means that we must be statically sure that no GC can occur while 154 // GC. This means that we must be statically sure that no GC can occur while
155 // they are running. If that is the case they should override this to return 155 // they are running. If that is the case they should override this to return
156 // true, which will cause an assertion if we try to call something that can 156 // true, which will cause an assertion if we try to call something that can
157 // GC or if we try to put a stack frame on top of the junk, which would not 157 // GC or if we try to put a stack frame on top of the junk, which would not
158 // result in a traversable stack. 158 // result in a traversable stack.
159 virtual bool SometimesSetsUpAFrame() { return true; } 159 virtual bool SometimesSetsUpAFrame() { return true; }
160 160
161 // Lookup the code in the (possibly custom) cache. 161 // Lookup the code in the (possibly custom) cache.
162 bool FindCodeInCache(Code** code_out); 162 bool FindCodeInCache(Code** code_out);
163 163
164 protected:
165 static const int kMajorBits = 6;
166 static const int kMinorBits = kBitsPerInt - kSmiTagSize - kMajorBits;
167
168 private: 164 private:
169 // Nonvirtual wrapper around the stub-specific Generate function. Call 165 // Nonvirtual wrapper around the stub-specific Generate function. Call
170 // this function to set up the macro assembler and generate the code. 166 // this function to set up the macro assembler and generate the code.
171 void GenerateCode(MacroAssembler* masm); 167 void GenerateCode(MacroAssembler* masm);
172 168
173 // Generates the assembler code for the stub. 169 // Generates the assembler code for the stub.
174 virtual void Generate(MacroAssembler* masm) = 0; 170 virtual void Generate(MacroAssembler* masm) = 0;
175 171
176 // Perform bookkeeping required after code generation when stub code is 172 // Perform bookkeeping required after code generation when stub code is
177 // initially generated. 173 // initially generated.
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215 // a fixed (non-moveable) code object. 211 // a fixed (non-moveable) code object.
216 virtual bool NeedsImmovableCode() { return false; } 212 virtual bool NeedsImmovableCode() { return false; }
217 213
218 // Computes the key based on major and minor. 214 // Computes the key based on major and minor.
219 uint32_t GetKey() { 215 uint32_t GetKey() {
220 ASSERT(static_cast<int>(MajorKey()) < NUMBER_OF_IDS); 216 ASSERT(static_cast<int>(MajorKey()) < NUMBER_OF_IDS);
221 return MinorKeyBits::encode(MinorKey()) | 217 return MinorKeyBits::encode(MinorKey()) |
222 MajorKeyBits::encode(MajorKey()); 218 MajorKeyBits::encode(MajorKey());
223 } 219 }
224 220
225 class MajorKeyBits: public BitField<uint32_t, 0, kMajorBits> {}; 221 class MajorKeyBits: public BitField<uint32_t, 0, kStubMajorKeyBits> {};
226 class MinorKeyBits: public BitField<uint32_t, kMajorBits, kMinorBits> {}; 222 class MinorKeyBits: public BitField<uint32_t,
223 kStubMajorKeyBits, kStubMinorKeyBits> {}; // NOLINT
227 224
228 friend class BreakPointIterator; 225 friend class BreakPointIterator;
229 }; 226 };
230 227
231 228
232 // Helper interface to prepare to/restore after making runtime calls. 229 // Helper interface to prepare to/restore after making runtime calls.
233 class RuntimeCallHelper { 230 class RuntimeCallHelper {
234 public: 231 public:
235 virtual ~RuntimeCallHelper() {} 232 virtual ~RuntimeCallHelper() {}
236 233
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1141 int MinorKey() { return 0; } 1138 int MinorKey() { return 0; }
1142 1139
1143 void Generate(MacroAssembler* masm); 1140 void Generate(MacroAssembler* masm);
1144 1141
1145 DISALLOW_COPY_AND_ASSIGN(StoreArrayLiteralElementStub); 1142 DISALLOW_COPY_AND_ASSIGN(StoreArrayLiteralElementStub);
1146 }; 1143 };
1147 1144
1148 } } // namespace v8::internal 1145 } } // namespace v8::internal
1149 1146
1150 #endif // V8_CODE_STUBS_H_ 1147 #endif // V8_CODE_STUBS_H_
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