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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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531 const uint32_t kShortcutTypeMask = | 531 const uint32_t kShortcutTypeMask = |
532 kIsNotStringMask | | 532 kIsNotStringMask | |
533 kIsSymbolMask | | 533 kIsSymbolMask | |
534 kStringRepresentationMask; | 534 kStringRepresentationMask; |
535 const uint32_t kShortcutTypeTag = kConsStringTag; | 535 const uint32_t kShortcutTypeTag = kConsStringTag; |
536 | 536 |
537 | 537 |
538 enum InstanceType { | 538 enum InstanceType { |
539 // String types. | 539 // String types. |
540 SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kSeqStringTag, | 540 SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kSeqStringTag, |
541 ASCII_SYMBOL_TYPE = kOneByteStringTag | kAsciiDataHintTag | kSymbolTag | | 541 ASCII_SYMBOL_TYPE = kOneByteStringTag | kSymbolTag | kSeqStringTag, |
542 kSeqStringTag, | |
543 CONS_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kConsStringTag, | 542 CONS_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kConsStringTag, |
544 CONS_ASCII_SYMBOL_TYPE = kOneByteStringTag | kAsciiDataHintTag | kSymbolTag | | 543 CONS_ASCII_SYMBOL_TYPE = kOneByteStringTag | kSymbolTag | kConsStringTag, |
545 kConsStringTag, | |
546 SHORT_EXTERNAL_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | | 544 SHORT_EXTERNAL_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | |
547 kExternalStringTag | kShortExternalStringTag, | 545 kExternalStringTag | kShortExternalStringTag, |
548 SHORT_EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE = | 546 SHORT_EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE = |
549 kTwoByteStringTag | kSymbolTag | kExternalStringTag | | 547 kTwoByteStringTag | kSymbolTag | kExternalStringTag | |
550 kAsciiDataHintTag | kShortExternalStringTag, | 548 kAsciiDataHintTag | kShortExternalStringTag, |
551 SHORT_EXTERNAL_ASCII_SYMBOL_TYPE = kOneByteStringTag | kAsciiDataHintTag | | 549 SHORT_EXTERNAL_ASCII_SYMBOL_TYPE = kOneByteStringTag | kExternalStringTag | |
552 kExternalStringTag | kSymbolTag | | 550 kSymbolTag | kShortExternalStringTag, |
553 kShortExternalStringTag, | |
554 EXTERNAL_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kExternalStringTag, | 551 EXTERNAL_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kExternalStringTag, |
555 EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE = | 552 EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE = |
556 kTwoByteStringTag | kSymbolTag | kExternalStringTag | kAsciiDataHintTag, | 553 kTwoByteStringTag | kSymbolTag | kExternalStringTag | kAsciiDataHintTag, |
557 EXTERNAL_ASCII_SYMBOL_TYPE = | 554 EXTERNAL_ASCII_SYMBOL_TYPE = |
558 kOneByteStringTag | kAsciiDataHintTag | kSymbolTag | kExternalStringTag, | 555 kOneByteStringTag | kSymbolTag | kExternalStringTag, |
559 STRING_TYPE = kTwoByteStringTag | kSeqStringTag, | 556 STRING_TYPE = kTwoByteStringTag | kSeqStringTag, |
560 ASCII_STRING_TYPE = kOneByteStringTag | kAsciiDataHintTag | kSeqStringTag, | 557 ASCII_STRING_TYPE = kOneByteStringTag | kSeqStringTag, |
561 CONS_STRING_TYPE = kTwoByteStringTag | kConsStringTag, | 558 CONS_STRING_TYPE = kTwoByteStringTag | kConsStringTag, |
562 CONS_ASCII_STRING_TYPE = | 559 CONS_ASCII_STRING_TYPE = kOneByteStringTag | kConsStringTag, |
563 kOneByteStringTag | kAsciiDataHintTag | kConsStringTag, | |
564 SLICED_STRING_TYPE = kTwoByteStringTag | kSlicedStringTag, | 560 SLICED_STRING_TYPE = kTwoByteStringTag | kSlicedStringTag, |
565 SLICED_ASCII_STRING_TYPE = | 561 SLICED_ASCII_STRING_TYPE = kOneByteStringTag | kSlicedStringTag, |
566 kOneByteStringTag | kAsciiDataHintTag | kSlicedStringTag, | |
567 SHORT_EXTERNAL_STRING_TYPE = | 562 SHORT_EXTERNAL_STRING_TYPE = |
568 kTwoByteStringTag | kExternalStringTag | kShortExternalStringTag, | 563 kTwoByteStringTag | kExternalStringTag | kShortExternalStringTag, |
569 SHORT_EXTERNAL_STRING_WITH_ASCII_DATA_TYPE = | 564 SHORT_EXTERNAL_STRING_WITH_ASCII_DATA_TYPE = |
570 kTwoByteStringTag | kExternalStringTag | | 565 kTwoByteStringTag | kExternalStringTag | |
571 kAsciiDataHintTag | kShortExternalStringTag, | 566 kAsciiDataHintTag | kShortExternalStringTag, |
572 SHORT_EXTERNAL_ASCII_STRING_TYPE = | 567 SHORT_EXTERNAL_ASCII_STRING_TYPE = |
573 kOneByteStringTag | kAsciiDataHintTag | | 568 kOneByteStringTag | kExternalStringTag | kShortExternalStringTag, |
574 kExternalStringTag | kShortExternalStringTag, | |
575 EXTERNAL_STRING_TYPE = kTwoByteStringTag | kExternalStringTag, | 569 EXTERNAL_STRING_TYPE = kTwoByteStringTag | kExternalStringTag, |
576 EXTERNAL_STRING_WITH_ASCII_DATA_TYPE = | 570 EXTERNAL_STRING_WITH_ASCII_DATA_TYPE = |
577 kTwoByteStringTag | kExternalStringTag | kAsciiDataHintTag, | 571 kTwoByteStringTag | kExternalStringTag | kAsciiDataHintTag, |
578 // LAST_STRING_TYPE | 572 // LAST_STRING_TYPE |
579 EXTERNAL_ASCII_STRING_TYPE = | 573 EXTERNAL_ASCII_STRING_TYPE = kOneByteStringTag | kExternalStringTag, |
580 kOneByteStringTag | kAsciiDataHintTag | kExternalStringTag, | |
581 PRIVATE_EXTERNAL_ASCII_STRING_TYPE = EXTERNAL_ASCII_STRING_TYPE, | 574 PRIVATE_EXTERNAL_ASCII_STRING_TYPE = EXTERNAL_ASCII_STRING_TYPE, |
582 | 575 |
583 // Objects allocated in their own spaces (never in new space). | 576 // Objects allocated in their own spaces (never in new space). |
584 MAP_TYPE = kNotStringTag, // FIRST_NONSTRING_TYPE | 577 MAP_TYPE = kNotStringTag, // FIRST_NONSTRING_TYPE |
585 CODE_TYPE, | 578 CODE_TYPE, |
586 ODDBALL_TYPE, | 579 ODDBALL_TYPE, |
587 JS_GLOBAL_PROPERTY_CELL_TYPE, | 580 JS_GLOBAL_PROPERTY_CELL_TYPE, |
588 | 581 |
589 // "Data", objects that cannot contain non-map-word pointers to heap | 582 // "Data", objects that cannot contain non-map-word pointers to heap |
590 // objects. | 583 // objects. |
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8833 } else { | 8826 } else { |
8834 value &= ~(1 << bit_position); | 8827 value &= ~(1 << bit_position); |
8835 } | 8828 } |
8836 return value; | 8829 return value; |
8837 } | 8830 } |
8838 }; | 8831 }; |
8839 | 8832 |
8840 } } // namespace v8::internal | 8833 } } // namespace v8::internal |
8841 | 8834 |
8842 #endif // V8_OBJECTS_H_ | 8835 #endif // V8_OBJECTS_H_ |
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