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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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478 // heap.cc and mark-compact.cc. | 478 // heap.cc and mark-compact.cc. |
479 const uint32_t kShortcutTypeMask = | 479 const uint32_t kShortcutTypeMask = |
480 kIsNotStringMask | | 480 kIsNotStringMask | |
481 kIsSymbolMask | | 481 kIsSymbolMask | |
482 kStringRepresentationMask; | 482 kStringRepresentationMask; |
483 const uint32_t kShortcutTypeTag = kConsStringTag; | 483 const uint32_t kShortcutTypeTag = kConsStringTag; |
484 | 484 |
485 | 485 |
486 enum InstanceType { | 486 enum InstanceType { |
487 // String types. | 487 // String types. |
488 // FIRST_STRING_TYPE | |
489 SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kSeqStringTag, | 488 SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kSeqStringTag, |
490 ASCII_SYMBOL_TYPE = kAsciiStringTag | kSymbolTag | kSeqStringTag, | 489 ASCII_SYMBOL_TYPE = kAsciiStringTag | kSymbolTag | kSeqStringTag, |
491 CONS_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kConsStringTag, | 490 CONS_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kConsStringTag, |
492 CONS_ASCII_SYMBOL_TYPE = kAsciiStringTag | kSymbolTag | kConsStringTag, | 491 CONS_ASCII_SYMBOL_TYPE = kAsciiStringTag | kSymbolTag | kConsStringTag, |
493 EXTERNAL_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kExternalStringTag, | 492 EXTERNAL_SYMBOL_TYPE = kTwoByteStringTag | kSymbolTag | kExternalStringTag, |
494 EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE = | 493 EXTERNAL_SYMBOL_WITH_ASCII_DATA_TYPE = |
495 kTwoByteStringTag | kSymbolTag | kExternalStringTag | kAsciiDataHintTag, | 494 kTwoByteStringTag | kSymbolTag | kExternalStringTag | kAsciiDataHintTag, |
496 EXTERNAL_ASCII_SYMBOL_TYPE = | 495 EXTERNAL_ASCII_SYMBOL_TYPE = |
497 kAsciiStringTag | kSymbolTag | kExternalStringTag, | 496 kAsciiStringTag | kSymbolTag | kExternalStringTag, |
498 STRING_TYPE = kTwoByteStringTag | kSeqStringTag, | 497 STRING_TYPE = kTwoByteStringTag | kSeqStringTag, |
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561 | 560 |
562 JS_REGEXP_TYPE, // LAST_JS_OBJECT_TYPE, FIRST_FUNCTION_CLASS_TYPE | 561 JS_REGEXP_TYPE, // LAST_JS_OBJECT_TYPE, FIRST_FUNCTION_CLASS_TYPE |
563 | 562 |
564 JS_FUNCTION_TYPE, | 563 JS_FUNCTION_TYPE, |
565 | 564 |
566 // Pseudo-types | 565 // Pseudo-types |
567 FIRST_TYPE = 0x0, | 566 FIRST_TYPE = 0x0, |
568 LAST_TYPE = JS_FUNCTION_TYPE, | 567 LAST_TYPE = JS_FUNCTION_TYPE, |
569 INVALID_TYPE = FIRST_TYPE - 1, | 568 INVALID_TYPE = FIRST_TYPE - 1, |
570 FIRST_NONSTRING_TYPE = MAP_TYPE, | 569 FIRST_NONSTRING_TYPE = MAP_TYPE, |
571 FIRST_STRING_TYPE = FIRST_TYPE, | |
572 LAST_STRING_TYPE = FIRST_NONSTRING_TYPE - 1, | |
573 // Boundaries for testing for an external array. | 570 // Boundaries for testing for an external array. |
574 FIRST_EXTERNAL_ARRAY_TYPE = EXTERNAL_BYTE_ARRAY_TYPE, | 571 FIRST_EXTERNAL_ARRAY_TYPE = EXTERNAL_BYTE_ARRAY_TYPE, |
575 LAST_EXTERNAL_ARRAY_TYPE = EXTERNAL_PIXEL_ARRAY_TYPE, | 572 LAST_EXTERNAL_ARRAY_TYPE = EXTERNAL_PIXEL_ARRAY_TYPE, |
576 // Boundary for promotion to old data space/old pointer space. | 573 // Boundary for promotion to old data space/old pointer space. |
577 LAST_DATA_TYPE = FILLER_TYPE, | 574 LAST_DATA_TYPE = FILLER_TYPE, |
578 // Boundaries for testing the type is a JavaScript "object". Note that | 575 // Boundaries for testing the type is a JavaScript "object". Note that |
579 // function objects are not counted as objects, even though they are | 576 // function objects are not counted as objects, even though they are |
580 // implemented as such; only values whose typeof is "object" are included. | 577 // implemented as such; only values whose typeof is "object" are included. |
581 FIRST_JS_OBJECT_TYPE = JS_VALUE_TYPE, | 578 FIRST_JS_OBJECT_TYPE = JS_VALUE_TYPE, |
582 LAST_JS_OBJECT_TYPE = JS_REGEXP_TYPE, | 579 LAST_JS_OBJECT_TYPE = JS_REGEXP_TYPE, |
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6715 } else { | 6712 } else { |
6716 value &= ~(1 << bit_position); | 6713 value &= ~(1 << bit_position); |
6717 } | 6714 } |
6718 return value; | 6715 return value; |
6719 } | 6716 } |
6720 }; | 6717 }; |
6721 | 6718 |
6722 } } // namespace v8::internal | 6719 } } // namespace v8::internal |
6723 | 6720 |
6724 #endif // V8_OBJECTS_H_ | 6721 #endif // V8_OBJECTS_H_ |
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