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Issue 19492007: Generate KeyedLoadDictionaryElementStub with Hydrogen (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Add V8_OVERRIDE Created 7 years, 1 month ago
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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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3962 Label done; 3962 Label done;
3963 3963
3964 GetNumberHash(r0, r1); 3964 GetNumberHash(r0, r1);
3965 3965
3966 // Compute capacity mask. 3966 // Compute capacity mask.
3967 SmiToInteger32(r1, FieldOperand(elements, 3967 SmiToInteger32(r1, FieldOperand(elements,
3968 SeededNumberDictionary::kCapacityOffset)); 3968 SeededNumberDictionary::kCapacityOffset));
3969 decl(r1); 3969 decl(r1);
3970 3970
3971 // Generate an unrolled loop that performs a few probes before giving up. 3971 // Generate an unrolled loop that performs a few probes before giving up.
3972 const int kProbes = 4; 3972 for (int i = 0; i < kNumberDictionaryProbes; i++) {
3973 for (int i = 0; i < kProbes; i++) {
3974 // Use r2 for index calculations and keep the hash intact in r0. 3973 // Use r2 for index calculations and keep the hash intact in r0.
3975 movq(r2, r0); 3974 movq(r2, r0);
3976 // Compute the masked index: (hash + i + i * i) & mask. 3975 // Compute the masked index: (hash + i + i * i) & mask.
3977 if (i > 0) { 3976 if (i > 0) {
3978 addl(r2, Immediate(SeededNumberDictionary::GetProbeOffset(i))); 3977 addl(r2, Immediate(SeededNumberDictionary::GetProbeOffset(i)));
3979 } 3978 }
3980 and_(r2, r1); 3979 and_(r2, r1);
3981 3980
3982 // Scale the index by multiplying by the entry size. 3981 // Scale the index by multiplying by the entry size.
3983 ASSERT(SeededNumberDictionary::kEntrySize == 3); 3982 ASSERT(SeededNumberDictionary::kEntrySize == 3);
3984 lea(r2, Operand(r2, r2, times_2, 0)); // r2 = r2 * 3 3983 lea(r2, Operand(r2, r2, times_2, 0)); // r2 = r2 * 3
3985 3984
3986 // Check if the key matches. 3985 // Check if the key matches.
3987 cmpq(key, FieldOperand(elements, 3986 cmpq(key, FieldOperand(elements,
3988 r2, 3987 r2,
3989 times_pointer_size, 3988 times_pointer_size,
3990 SeededNumberDictionary::kElementsStartOffset)); 3989 SeededNumberDictionary::kElementsStartOffset));
3991 if (i != (kProbes - 1)) { 3990 if (i != (kNumberDictionaryProbes - 1)) {
3992 j(equal, &done); 3991 j(equal, &done);
3993 } else { 3992 } else {
3994 j(not_equal, miss); 3993 j(not_equal, miss);
3995 } 3994 }
3996 } 3995 }
3997 3996
3998 bind(&done); 3997 bind(&done);
3999 // Check that the value is a normal propety. 3998 // Check that the value is a normal propety.
4000 const int kDetailsOffset = 3999 const int kDetailsOffset =
4001 SeededNumberDictionary::kElementsStartOffset + 2 * kPointerSize; 4000 SeededNumberDictionary::kElementsStartOffset + 2 * kPointerSize;
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4964 movq(arg_reg_1, isolate, RelocInfo::EXTERNAL_REFERENCE); 4963 movq(arg_reg_1, isolate, RelocInfo::EXTERNAL_REFERENCE);
4965 CallCFunction( 4964 CallCFunction(
4966 ExternalReference::record_object_allocation_function(isolate), 3); 4965 ExternalReference::record_object_allocation_function(isolate), 3);
4967 PopSafepointRegisters(); 4966 PopSafepointRegisters();
4968 } 4967 }
4969 4968
4970 4969
4971 } } // namespace v8::internal 4970 } } // namespace v8::internal
4972 4971
4973 #endif // V8_TARGET_ARCH_X64 4972 #endif // V8_TARGET_ARCH_X64
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