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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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| 960 __ CompareRoot(FieldOperand(rax, HeapObject::kMapOffset), | 960 __ CompareRoot(FieldOperand(rax, HeapObject::kMapOffset), |
| 961 Heap::kMetaMapRootIndex); | 961 Heap::kMetaMapRootIndex); |
| 962 __ j(not_equal, &fixed_array, Label::kNear); | 962 __ j(not_equal, &fixed_array, Label::kNear); |
| 963 | 963 |
| 964 // We got a map in register rax. Get the enumeration cache from it. | 964 // We got a map in register rax. Get the enumeration cache from it. |
| 965 __ bind(&use_cache); | 965 __ bind(&use_cache); |
| 966 __ LoadInstanceDescriptors(rax, rcx); | 966 __ LoadInstanceDescriptors(rax, rcx); |
| 967 __ movq(rcx, FieldOperand(rcx, DescriptorArray::kEnumerationIndexOffset)); | 967 __ movq(rcx, FieldOperand(rcx, DescriptorArray::kEnumerationIndexOffset)); |
| 968 __ movq(rdx, FieldOperand(rcx, DescriptorArray::kEnumCacheBridgeCacheOffset)); | 968 __ movq(rdx, FieldOperand(rcx, DescriptorArray::kEnumCacheBridgeCacheOffset)); |
| 969 | 969 |
| 970 // Setup the four remaining stack slots. | 970 // Set up the four remaining stack slots. |
| 971 __ push(rax); // Map. | 971 __ push(rax); // Map. |
| 972 __ push(rdx); // Enumeration cache. | 972 __ push(rdx); // Enumeration cache. |
| 973 __ movq(rax, FieldOperand(rdx, FixedArray::kLengthOffset)); | 973 __ movq(rax, FieldOperand(rdx, FixedArray::kLengthOffset)); |
| 974 __ push(rax); // Enumeration cache length (as smi). | 974 __ push(rax); // Enumeration cache length (as smi). |
| 975 __ Push(Smi::FromInt(0)); // Initial index. | 975 __ Push(Smi::FromInt(0)); // Initial index. |
| 976 __ jmp(&loop); | 976 __ jmp(&loop); |
| 977 | 977 |
| 978 // We got a fixed array in register rax. Iterate through that. | 978 // We got a fixed array in register rax. Iterate through that. |
| 979 Label non_proxy; | 979 Label non_proxy; |
| 980 __ bind(&fixed_array); | 980 __ bind(&fixed_array); |
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| 4346 *context_length = 0; | 4346 *context_length = 0; |
| 4347 return previous_; | 4347 return previous_; |
| 4348 } | 4348 } |
| 4349 | 4349 |
| 4350 | 4350 |
| 4351 #undef __ | 4351 #undef __ |
| 4352 | 4352 |
| 4353 } } // namespace v8::internal | 4353 } } // namespace v8::internal |
| 4354 | 4354 |
| 4355 #endif // V8_TARGET_ARCH_X64 | 4355 #endif // V8_TARGET_ARCH_X64 |
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