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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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| 5996 // Do a tail call to the rewritten stub. | 5996 // Do a tail call to the rewritten stub. |
| 5997 __ jmp(Operand(edi)); | 5997 __ jmp(Operand(edi)); |
| 5998 } | 5998 } |
| 5999 | 5999 |
| 6000 | 6000 |
| 6001 // Helper function used to check that the dictionary doesn't contain | 6001 // Helper function used to check that the dictionary doesn't contain |
| 6002 // the property. This function may return false negatives, so miss_label | 6002 // the property. This function may return false negatives, so miss_label |
| 6003 // must always call a backup property check that is complete. | 6003 // must always call a backup property check that is complete. |
| 6004 // This function is safe to call if the receiver has fast properties. | 6004 // This function is safe to call if the receiver has fast properties. |
| 6005 // Name must be a symbol and receiver must be a heap object. | 6005 // Name must be a symbol and receiver must be a heap object. |
| 6006 void StringDictionaryLookupStub::GenerateNegativeLookup(MacroAssembler* masm, | 6006 MaybeObject* StringDictionaryLookupStub::GenerateNegativeLookup( |
| 6007 Label* miss, | 6007 MacroAssembler* masm, |
| 6008 Label* done, | 6008 Label* miss, |
| 6009 Register properties, | 6009 Label* done, |
| 6010 String* name, | 6010 Register properties, |
| 6011 Register r0) { | 6011 String* name, |
| 6012 Register r0) { |
| 6012 ASSERT(name->IsSymbol()); | 6013 ASSERT(name->IsSymbol()); |
| 6013 | 6014 |
| 6014 // If names of slots in range from 1 to kProbes - 1 for the hash value are | 6015 // If names of slots in range from 1 to kProbes - 1 for the hash value are |
| 6015 // not equal to the name and kProbes-th slot is not used (its name is the | 6016 // not equal to the name and kProbes-th slot is not used (its name is the |
| 6016 // undefined value), it guarantees the hash table doesn't contain the | 6017 // undefined value), it guarantees the hash table doesn't contain the |
| 6017 // property. It's true even if some slots represent deleted properties | 6018 // property. It's true even if some slots represent deleted properties |
| 6018 // (their names are the null value). | 6019 // (their names are the null value). |
| 6019 for (int i = 0; i < kInlinedProbes; i++) { | 6020 for (int i = 0; i < kInlinedProbes; i++) { |
| 6020 // Compute the masked index: (hash + i + i * i) & mask. | 6021 // Compute the masked index: (hash + i + i * i) & mask. |
| 6021 Register index = r0; | 6022 Register index = r0; |
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| 6047 kIsSymbolMask); | 6048 kIsSymbolMask); |
| 6048 __ j(zero, miss, not_taken); | 6049 __ j(zero, miss, not_taken); |
| 6049 } | 6050 } |
| 6050 | 6051 |
| 6051 StringDictionaryLookupStub stub(properties, | 6052 StringDictionaryLookupStub stub(properties, |
| 6052 r0, | 6053 r0, |
| 6053 r0, | 6054 r0, |
| 6054 StringDictionaryLookupStub::NEGATIVE_LOOKUP); | 6055 StringDictionaryLookupStub::NEGATIVE_LOOKUP); |
| 6055 __ push(Immediate(Handle<Object>(name))); | 6056 __ push(Immediate(Handle<Object>(name))); |
| 6056 __ push(Immediate(name->Hash())); | 6057 __ push(Immediate(name->Hash())); |
| 6057 __ CallStub(&stub); | 6058 MaybeObject* result = masm->TryCallStub(&stub); |
| 6059 if (result->IsFailure()) return result; |
| 6058 __ test(r0, Operand(r0)); | 6060 __ test(r0, Operand(r0)); |
| 6059 __ j(not_zero, miss); | 6061 __ j(not_zero, miss); |
| 6060 __ jmp(done); | 6062 __ jmp(done); |
| 6063 return result; |
| 6061 } | 6064 } |
| 6062 | 6065 |
| 6063 | 6066 |
| 6064 // Probe the string dictionary in the |elements| register. Jump to the | 6067 // Probe the string dictionary in the |elements| register. Jump to the |
| 6065 // |done| label if a property with the given name is found leaving the | 6068 // |done| label if a property with the given name is found leaving the |
| 6066 // index into the dictionary in |r0|. Jump to the |miss| label | 6069 // index into the dictionary in |r0|. Jump to the |miss| label |
| 6067 // otherwise. | 6070 // otherwise. |
| 6068 void StringDictionaryLookupStub::GeneratePositiveLookup(MacroAssembler* masm, | 6071 void StringDictionaryLookupStub::GeneratePositiveLookup(MacroAssembler* masm, |
| 6069 Label* miss, | 6072 Label* miss, |
| 6070 Label* done, | 6073 Label* done, |
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| 6205 __ Drop(1); | 6208 __ Drop(1); |
| 6206 __ ret(2 * kPointerSize); | 6209 __ ret(2 * kPointerSize); |
| 6207 } | 6210 } |
| 6208 | 6211 |
| 6209 | 6212 |
| 6210 #undef __ | 6213 #undef __ |
| 6211 | 6214 |
| 6212 } } // namespace v8::internal | 6215 } } // namespace v8::internal |
| 6213 | 6216 |
| 6214 #endif // V8_TARGET_ARCH_IA32 | 6217 #endif // V8_TARGET_ARCH_IA32 |
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