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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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270 | 270 |
271 virtual Code::Kind GetCodeKind() const { return Code::STUB; } | 271 virtual Code::Kind GetCodeKind() const { return Code::STUB; } |
272 | 272 |
273 protected: | 273 protected: |
274 // Generates the assembler code for the stub. | 274 // Generates the assembler code for the stub. |
275 virtual void Generate(MacroAssembler* masm) = 0; | 275 virtual void Generate(MacroAssembler* masm) = 0; |
276 }; | 276 }; |
277 | 277 |
278 | 278 |
279 enum StubFunctionMode { NOT_JS_FUNCTION_STUB_MODE, JS_FUNCTION_STUB_MODE }; | 279 enum StubFunctionMode { NOT_JS_FUNCTION_STUB_MODE, JS_FUNCTION_STUB_MODE }; |
280 | 280 enum HandlerArgumentsMode { DONT_PASS_ARGUMENTS, PASS_ARGUMENTS }; |
281 | 281 |
282 struct CodeStubInterfaceDescriptor { | 282 struct CodeStubInterfaceDescriptor { |
283 CodeStubInterfaceDescriptor(); | 283 CodeStubInterfaceDescriptor(); |
284 int register_param_count_; | 284 int register_param_count_; |
| 285 |
285 Register stack_parameter_count_; | 286 Register stack_parameter_count_; |
286 // if hint_stack_parameter_count_ > 0, the code stub can optimize the | 287 // if hint_stack_parameter_count_ > 0, the code stub can optimize the |
287 // return sequence. Default value is -1, which means it is ignored. | 288 // return sequence. Default value is -1, which means it is ignored. |
288 int hint_stack_parameter_count_; | 289 int hint_stack_parameter_count_; |
289 StubFunctionMode function_mode_; | 290 StubFunctionMode function_mode_; |
290 Register* register_params_; | 291 Register* register_params_; |
| 292 |
291 Address deoptimization_handler_; | 293 Address deoptimization_handler_; |
| 294 HandlerArgumentsMode handler_arguments_mode_; |
292 | 295 |
293 int environment_length() const { | 296 int environment_length() const { |
294 if (stack_parameter_count_.is_valid()) { | |
295 return register_param_count_ + 1; | |
296 } | |
297 return register_param_count_; | 297 return register_param_count_; |
298 } | 298 } |
299 | 299 |
300 bool initialized() const { return register_param_count_ >= 0; } | 300 bool initialized() const { return register_param_count_ >= 0; } |
301 | 301 |
302 void SetMissHandler(ExternalReference handler) { | 302 void SetMissHandler(ExternalReference handler) { |
303 miss_handler_ = handler; | 303 miss_handler_ = handler; |
304 has_miss_handler_ = true; | 304 has_miss_handler_ = true; |
| 305 // Our miss handler infrastructure doesn't currently support |
| 306 // variable stack parameter counts. |
| 307 ASSERT(!stack_parameter_count_.is_valid()); |
305 } | 308 } |
306 | 309 |
307 ExternalReference miss_handler() { | 310 ExternalReference miss_handler() { |
308 ASSERT(has_miss_handler_); | 311 ASSERT(has_miss_handler_); |
309 return miss_handler_; | 312 return miss_handler_; |
310 } | 313 } |
311 | 314 |
312 bool has_miss_handler() { | 315 bool has_miss_handler() { |
313 return has_miss_handler_; | 316 return has_miss_handler_; |
314 } | 317 } |
315 | 318 |
| 319 Register GetParameterRegister(int index) { |
| 320 return register_params_[index]; |
| 321 } |
| 322 |
| 323 bool IsParameterCountRegister(int index) { |
| 324 return GetParameterRegister(index).is(stack_parameter_count_); |
| 325 } |
| 326 |
| 327 int GetHandlerParameterCount() { |
| 328 int params = environment_length(); |
| 329 if (handler_arguments_mode_ == PASS_ARGUMENTS) { |
| 330 params += 1; |
| 331 } |
| 332 return params; |
| 333 } |
| 334 |
316 private: | 335 private: |
317 ExternalReference miss_handler_; | 336 ExternalReference miss_handler_; |
318 bool has_miss_handler_; | 337 bool has_miss_handler_; |
319 }; | 338 }; |
320 | 339 |
321 // A helper to make up for the fact that type Register is not fully | |
322 // defined outside of the platform directories | |
323 #define DESCRIPTOR_GET_PARAMETER_REGISTER(descriptor, index) \ | |
324 ((index) == (descriptor)->register_param_count_) \ | |
325 ? (descriptor)->stack_parameter_count_ \ | |
326 : (descriptor)->register_params_[(index)] | |
327 | |
328 | 340 |
329 class HydrogenCodeStub : public CodeStub { | 341 class HydrogenCodeStub : public CodeStub { |
330 public: | 342 public: |
331 enum InitializationState { | 343 enum InitializationState { |
332 UNINITIALIZED, | 344 UNINITIALIZED, |
333 INITIALIZED | 345 INITIALIZED |
334 }; | 346 }; |
335 | 347 |
336 explicit HydrogenCodeStub(InitializationState state = INITIALIZED) { | 348 explicit HydrogenCodeStub(InitializationState state = INITIALIZED) { |
337 is_uninitialized_ = (state == UNINITIALIZED); | 349 is_uninitialized_ = (state == UNINITIALIZED); |
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2406 int MinorKey() { return 0; } | 2418 int MinorKey() { return 0; } |
2407 | 2419 |
2408 void Generate(MacroAssembler* masm); | 2420 void Generate(MacroAssembler* masm); |
2409 | 2421 |
2410 DISALLOW_COPY_AND_ASSIGN(ProfileEntryHookStub); | 2422 DISALLOW_COPY_AND_ASSIGN(ProfileEntryHookStub); |
2411 }; | 2423 }; |
2412 | 2424 |
2413 } } // namespace v8::internal | 2425 } } // namespace v8::internal |
2414 | 2426 |
2415 #endif // V8_CODE_STUBS_H_ | 2427 #endif // V8_CODE_STUBS_H_ |
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