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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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384 // the caller. | 384 // the caller. |
385 class RegisterAllocation { | 385 class RegisterAllocation { |
386 public: | 386 public: |
387 RegisterAllocation(Register object, | 387 RegisterAllocation(Register object, |
388 Register address, | 388 Register address, |
389 Register scratch0) | 389 Register scratch0) |
390 : object_(object), | 390 : object_(object), |
391 address_(address), | 391 address_(address), |
392 scratch0_(scratch0) { | 392 scratch0_(scratch0) { |
393 ASSERT(!AreAliased(scratch0, object, address, no_reg)); | 393 ASSERT(!AreAliased(scratch0, object, address, no_reg)); |
394 scratch1_ = GetRegThatIsNotOneOf(object_, address_, scratch0_); | 394 scratch1_ = GetRegisterThatIsNotOneOf(object_, address_, scratch0_); |
395 } | 395 } |
396 | 396 |
397 void Save(MacroAssembler* masm) { | 397 void Save(MacroAssembler* masm) { |
398 ASSERT(!AreAliased(object_, address_, scratch1_, scratch0_)); | 398 ASSERT(!AreAliased(object_, address_, scratch1_, scratch0_)); |
399 // We don't have to save scratch0_ because it was given to us as | 399 // We don't have to save scratch0_ because it was given to us as |
400 // a scratch register. | 400 // a scratch register. |
401 masm->push(scratch1_); | 401 masm->push(scratch1_); |
402 } | 402 } |
403 | 403 |
404 void Restore(MacroAssembler* masm) { | 404 void Restore(MacroAssembler* masm) { |
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427 inline Register address() { return address_; } | 427 inline Register address() { return address_; } |
428 inline Register scratch0() { return scratch0_; } | 428 inline Register scratch0() { return scratch0_; } |
429 inline Register scratch1() { return scratch1_; } | 429 inline Register scratch1() { return scratch1_; } |
430 | 430 |
431 private: | 431 private: |
432 Register object_; | 432 Register object_; |
433 Register address_; | 433 Register address_; |
434 Register scratch0_; | 434 Register scratch0_; |
435 Register scratch1_; | 435 Register scratch1_; |
436 | 436 |
437 Register GetRegThatIsNotOneOf(Register r1, | |
438 Register r2, | |
439 Register r3) { | |
440 for (int i = 0; i < Register::NumAllocatableRegisters(); i++) { | |
441 Register candidate = Register::FromAllocationIndex(i); | |
442 if (candidate.is(r1)) continue; | |
443 if (candidate.is(r2)) continue; | |
444 if (candidate.is(r3)) continue; | |
445 return candidate; | |
446 } | |
447 UNREACHABLE(); | |
448 return no_reg; | |
449 } | |
450 friend class RecordWriteStub; | 437 friend class RecordWriteStub; |
451 }; | 438 }; |
452 | 439 |
453 enum OnNoNeedToInformIncrementalMarker { | 440 enum OnNoNeedToInformIncrementalMarker { |
454 kReturnOnNoNeedToInformIncrementalMarker, | 441 kReturnOnNoNeedToInformIncrementalMarker, |
455 kUpdateRememberedSetOnNoNeedToInformIncrementalMarker | 442 kUpdateRememberedSetOnNoNeedToInformIncrementalMarker |
456 }; | 443 }; |
457 | 444 |
458 void Generate(MacroAssembler* masm); | 445 void Generate(MacroAssembler* masm); |
459 void GenerateIncremental(MacroAssembler* masm, Mode mode); | 446 void GenerateIncremental(MacroAssembler* masm, Mode mode); |
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574 | 561 |
575 class LookupModeBits: public BitField<LookupMode, 0, 1> {}; | 562 class LookupModeBits: public BitField<LookupMode, 0, 1> {}; |
576 | 563 |
577 LookupMode mode_; | 564 LookupMode mode_; |
578 }; | 565 }; |
579 | 566 |
580 | 567 |
581 } } // namespace v8::internal | 568 } } // namespace v8::internal |
582 | 569 |
583 #endif // V8_MIPS_CODE_STUBS_ARM_H_ | 570 #endif // V8_MIPS_CODE_STUBS_ARM_H_ |
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