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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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| 476 // cache. Otherwise probe the dictionary. | 476 // cache. Otherwise probe the dictionary. |
| 477 __ mov(ebx, FieldOperand(edx, JSObject::kPropertiesOffset)); | 477 __ mov(ebx, FieldOperand(edx, JSObject::kPropertiesOffset)); |
| 478 __ cmp(FieldOperand(ebx, HeapObject::kMapOffset), | 478 __ cmp(FieldOperand(ebx, HeapObject::kMapOffset), |
| 479 Immediate(isolate->factory()->hash_table_map())); | 479 Immediate(isolate->factory()->hash_table_map())); |
| 480 __ j(equal, &probe_dictionary); | 480 __ j(equal, &probe_dictionary); |
| 481 | 481 |
| 482 // The receiver's map is still in eax, compute the keyed lookup cache hash | 482 // The receiver's map is still in eax, compute the keyed lookup cache hash |
| 483 // based on 32 bits of the map pointer and the string hash. | 483 // based on 32 bits of the map pointer and the string hash. |
| 484 if (FLAG_debug_code) { | 484 if (FLAG_debug_code) { |
| 485 __ cmp(eax, FieldOperand(edx, HeapObject::kMapOffset)); | 485 __ cmp(eax, FieldOperand(edx, HeapObject::kMapOffset)); |
| 486 __ Check(equal, kMapIsNoLongerInEax); | 486 __ Check(equal, "Map is no longer in eax."); |
| 487 } | 487 } |
| 488 __ mov(ebx, eax); // Keep the map around for later. | 488 __ mov(ebx, eax); // Keep the map around for later. |
| 489 __ shr(eax, KeyedLookupCache::kMapHashShift); | 489 __ shr(eax, KeyedLookupCache::kMapHashShift); |
| 490 __ mov(edi, FieldOperand(ecx, String::kHashFieldOffset)); | 490 __ mov(edi, FieldOperand(ecx, String::kHashFieldOffset)); |
| 491 __ shr(edi, String::kHashShift); | 491 __ shr(edi, String::kHashShift); |
| 492 __ xor_(eax, edi); | 492 __ xor_(eax, edi); |
| 493 __ and_(eax, KeyedLookupCache::kCapacityMask & KeyedLookupCache::kHashMask); | 493 __ and_(eax, KeyedLookupCache::kCapacityMask & KeyedLookupCache::kHashMask); |
| 494 | 494 |
| 495 // Load the key (consisting of map and internalized string) from the cache and | 495 // Load the key (consisting of map and internalized string) from the cache and |
| 496 // check for match. | 496 // check for match. |
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| 1658 Condition cc = (check == ENABLE_INLINED_SMI_CHECK) | 1658 Condition cc = (check == ENABLE_INLINED_SMI_CHECK) |
| 1659 ? (*jmp_address == Assembler::kJncShortOpcode ? not_zero : zero) | 1659 ? (*jmp_address == Assembler::kJncShortOpcode ? not_zero : zero) |
| 1660 : (*jmp_address == Assembler::kJnzShortOpcode ? not_carry : carry); | 1660 : (*jmp_address == Assembler::kJnzShortOpcode ? not_carry : carry); |
| 1661 *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc); | 1661 *jmp_address = static_cast<byte>(Assembler::kJccShortPrefix | cc); |
| 1662 } | 1662 } |
| 1663 | 1663 |
| 1664 | 1664 |
| 1665 } } // namespace v8::internal | 1665 } } // namespace v8::internal |
| 1666 | 1666 |
| 1667 #endif // V8_TARGET_ARCH_IA32 | 1667 #endif // V8_TARGET_ARCH_IA32 |
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