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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 | kSymbolTag | kSeqStringTag, | 541 ASCII_SYMBOL_TYPE = kOneByteStringTag | kAsciiDataHintTag | kSymbolTag | |
| 542 kSeqStringTag, |
542 CONS_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kConsStringTag, | 543 CONS_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kConsStringTag, |
543 CONS_ASCII_SYMBOL_TYPE = kOneByteStringTag | kSymbolTag | kConsStringTag, | 544 CONS_ASCII_SYMBOL_TYPE = kOneByteStringTag | kAsciiDataHintTag | kSymbolTag | |
| 545 kConsStringTag, |
544 SHORT_EXTERNAL_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | | 546 SHORT_EXTERNAL_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | |
545 kExternalStringTag | kShortExternalStringTag, | 547 kExternalStringTag | kShortExternalStringTag, |
546 SHORT_EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE = | 548 SHORT_EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE = |
547 kTwoByteStringTag | kSymbolTag | kExternalStringTag | | 549 kTwoByteStringTag | kSymbolTag | kExternalStringTag | |
548 kAsciiDataHintTag | kShortExternalStringTag, | 550 kAsciiDataHintTag | kShortExternalStringTag, |
549 SHORT_EXTERNAL_ASCII_SYMBOL_TYPE = kOneByteStringTag | kExternalStringTag | | 551 SHORT_EXTERNAL_ASCII_SYMBOL_TYPE = kOneByteStringTag | kAsciiDataHintTag | |
550 kSymbolTag | kShortExternalStringTag, | 552 kExternalStringTag | kSymbolTag | |
| 553 kShortExternalStringTag, |
551 EXTERNAL_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kExternalStringTag, | 554 EXTERNAL_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kExternalStringTag, |
552 EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE = | 555 EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE = |
553 kTwoByteStringTag | kSymbolTag | kExternalStringTag | kAsciiDataHintTag, | 556 kTwoByteStringTag | kSymbolTag | kExternalStringTag | kAsciiDataHintTag, |
554 EXTERNAL_ASCII_SYMBOL_TYPE = | 557 EXTERNAL_ASCII_SYMBOL_TYPE = |
555 kOneByteStringTag | kSymbolTag | kExternalStringTag, | 558 kOneByteStringTag | kAsciiDataHintTag | kSymbolTag | kExternalStringTag, |
556 STRING_TYPE = kTwoByteStringTag | kSeqStringTag, | 559 STRING_TYPE = kTwoByteStringTag | kSeqStringTag, |
557 ASCII_STRING_TYPE = kOneByteStringTag | kSeqStringTag, | 560 ASCII_STRING_TYPE = kOneByteStringTag | kAsciiDataHintTag | kSeqStringTag, |
558 CONS_STRING_TYPE = kTwoByteStringTag | kConsStringTag, | 561 CONS_STRING_TYPE = kTwoByteStringTag | kConsStringTag, |
559 CONS_ASCII_STRING_TYPE = kOneByteStringTag | kConsStringTag, | 562 CONS_ASCII_STRING_TYPE = |
| 563 kOneByteStringTag | kAsciiDataHintTag | kConsStringTag, |
560 SLICED_STRING_TYPE = kTwoByteStringTag | kSlicedStringTag, | 564 SLICED_STRING_TYPE = kTwoByteStringTag | kSlicedStringTag, |
561 SLICED_ASCII_STRING_TYPE = kOneByteStringTag | kSlicedStringTag, | 565 SLICED_ASCII_STRING_TYPE = |
| 566 kOneByteStringTag | kAsciiDataHintTag | kSlicedStringTag, |
562 SHORT_EXTERNAL_STRING_TYPE = | 567 SHORT_EXTERNAL_STRING_TYPE = |
563 kTwoByteStringTag | kExternalStringTag | kShortExternalStringTag, | 568 kTwoByteStringTag | kExternalStringTag | kShortExternalStringTag, |
564 SHORT_EXTERNAL_STRING_WITH_ASCII_DATA_TYPE = | 569 SHORT_EXTERNAL_STRING_WITH_ASCII_DATA_TYPE = |
565 kTwoByteStringTag | kExternalStringTag | | 570 kTwoByteStringTag | kExternalStringTag | |
566 kAsciiDataHintTag | kShortExternalStringTag, | 571 kAsciiDataHintTag | kShortExternalStringTag, |
567 SHORT_EXTERNAL_ASCII_STRING_TYPE = | 572 SHORT_EXTERNAL_ASCII_STRING_TYPE = |
568 kOneByteStringTag | kExternalStringTag | kShortExternalStringTag, | 573 kOneByteStringTag | kAsciiDataHintTag | |
| 574 kExternalStringTag | kShortExternalStringTag, |
569 EXTERNAL_STRING_TYPE = kTwoByteStringTag | kExternalStringTag, | 575 EXTERNAL_STRING_TYPE = kTwoByteStringTag | kExternalStringTag, |
570 EXTERNAL_STRING_WITH_ASCII_DATA_TYPE = | 576 EXTERNAL_STRING_WITH_ASCII_DATA_TYPE = |
571 kTwoByteStringTag | kExternalStringTag | kAsciiDataHintTag, | 577 kTwoByteStringTag | kExternalStringTag | kAsciiDataHintTag, |
572 // LAST_STRING_TYPE | 578 // LAST_STRING_TYPE |
573 EXTERNAL_ASCII_STRING_TYPE = kOneByteStringTag | kExternalStringTag, | 579 EXTERNAL_ASCII_STRING_TYPE = |
| 580 kOneByteStringTag | kAsciiDataHintTag | kExternalStringTag, |
574 PRIVATE_EXTERNAL_ASCII_STRING_TYPE = EXTERNAL_ASCII_STRING_TYPE, | 581 PRIVATE_EXTERNAL_ASCII_STRING_TYPE = EXTERNAL_ASCII_STRING_TYPE, |
575 | 582 |
576 // Objects allocated in their own spaces (never in new space). | 583 // Objects allocated in their own spaces (never in new space). |
577 MAP_TYPE = kNotStringTag, // FIRST_NONSTRING_TYPE | 584 MAP_TYPE = kNotStringTag, // FIRST_NONSTRING_TYPE |
578 CODE_TYPE, | 585 CODE_TYPE, |
579 ODDBALL_TYPE, | 586 ODDBALL_TYPE, |
580 JS_GLOBAL_PROPERTY_CELL_TYPE, | 587 JS_GLOBAL_PROPERTY_CELL_TYPE, |
581 | 588 |
582 // "Data", objects that cannot contain non-map-word pointers to heap | 589 // "Data", objects that cannot contain non-map-word pointers to heap |
583 // objects. | 590 // objects. |
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8827 } else { | 8834 } else { |
8828 value &= ~(1 << bit_position); | 8835 value &= ~(1 << bit_position); |
8829 } | 8836 } |
8830 return value; | 8837 return value; |
8831 } | 8838 } |
8832 }; | 8839 }; |
8833 | 8840 |
8834 } } // namespace v8::internal | 8841 } } // namespace v8::internal |
8835 | 8842 |
8836 #endif // V8_OBJECTS_H_ | 8843 #endif // V8_OBJECTS_H_ |
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