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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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788 // Casting. | 788 // Casting. |
789 static inline Smi* cast(Object* object); | 789 static inline Smi* cast(Object* object); |
790 | 790 |
791 // Dispatched behavior. | 791 // Dispatched behavior. |
792 void SmiPrint(); | 792 void SmiPrint(); |
793 void SmiPrint(StringStream* accumulator); | 793 void SmiPrint(StringStream* accumulator); |
794 #ifdef DEBUG | 794 #ifdef DEBUG |
795 void SmiVerify(); | 795 void SmiVerify(); |
796 #endif | 796 #endif |
797 | 797 |
798 static const int kSmiPrecission = 31; | |
798 // Min and max limits for Smi values. | 799 // Min and max limits for Smi values. |
799 static const int kMinValue = -(1 << (kBitsPerPointer - (kSmiTagSize + 1))); | 800 static const int kMinValue = -(1 << (kSmiPrecission - (kSmiTagSize))); |
800 static const int kMaxValue = (1 << (kBitsPerPointer - (kSmiTagSize + 1))) - 1; | 801 static const int kMaxValue = (1 << (kSmiPrecission - (kSmiTagSize))) - 1; |
Dean McNamee
2009/05/04 13:04:14
I would call this kSmiNumBits, precision (spelling
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801 | 802 |
802 private: | 803 private: |
803 DISALLOW_IMPLICIT_CONSTRUCTORS(Smi); | 804 DISALLOW_IMPLICIT_CONSTRUCTORS(Smi); |
804 }; | 805 }; |
805 | 806 |
806 | 807 |
807 // Failure is used for reporting out of memory situations and | 808 // Failure is used for reporting out of memory situations and |
808 // propagating exceptions through the runtime system. Failure objects | 809 // propagating exceptions through the runtime system. Failure objects |
809 // are transient and cannot occur as part of the objects graph. | 810 // are transient and cannot occur as part of the objects graph. |
810 // | 811 // |
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2317 static int SizeFor(int body_size, int sinfo_size) { | 2318 static int SizeFor(int body_size, int sinfo_size) { |
2318 ASSERT_SIZE_TAG_ALIGNED(body_size); | 2319 ASSERT_SIZE_TAG_ALIGNED(body_size); |
2319 ASSERT_SIZE_TAG_ALIGNED(sinfo_size); | 2320 ASSERT_SIZE_TAG_ALIGNED(sinfo_size); |
2320 return RoundUp(kHeaderSize + body_size + sinfo_size, kCodeAlignment); | 2321 return RoundUp(kHeaderSize + body_size + sinfo_size, kCodeAlignment); |
2321 } | 2322 } |
2322 | 2323 |
2323 // Calculate the size of the code object to report for log events. This takes | 2324 // Calculate the size of the code object to report for log events. This takes |
2324 // the layout of the code object into account. | 2325 // the layout of the code object into account. |
2325 int ExecutableSize() { | 2326 int ExecutableSize() { |
2326 // Check that the assumptions about the layout of the code object holds. | 2327 // Check that the assumptions about the layout of the code object holds. |
2327 ASSERT_EQ(reinterpret_cast<unsigned int>(instruction_start()) - | 2328 ASSERT_EQ(reinterpret_cast<uintptr_t>(instruction_start()) - |
2328 reinterpret_cast<unsigned int>(address()), | 2329 reinterpret_cast<uintptr_t>(address()), |
Dean McNamee
2009/05/04 13:04:14
Do we really need this, both should be returning p
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2329 Code::kHeaderSize); | 2330 Code::kHeaderSize); |
2330 return instruction_size() + Code::kHeaderSize; | 2331 return instruction_size() + Code::kHeaderSize; |
2331 } | 2332 } |
2332 | 2333 |
2333 // Locating source position. | 2334 // Locating source position. |
2334 int SourcePosition(Address pc); | 2335 int SourcePosition(Address pc); |
2335 int SourceStatementPosition(Address pc); | 2336 int SourceStatementPosition(Address pc); |
2336 | 2337 |
2337 // Casting. | 2338 // Casting. |
2338 static inline Code* cast(Object* obj); | 2339 static inline Code* cast(Object* obj); |
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4368 } else { | 4369 } else { |
4369 value &= ~(1 << bit_position); | 4370 value &= ~(1 << bit_position); |
4370 } | 4371 } |
4371 return value; | 4372 return value; |
4372 } | 4373 } |
4373 }; | 4374 }; |
4374 | 4375 |
4375 } } // namespace v8::internal | 4376 } } // namespace v8::internal |
4376 | 4377 |
4377 #endif // V8_OBJECTS_H_ | 4378 #endif // V8_OBJECTS_H_ |
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