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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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