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Issue 173470: Generate specialized constructor code for constructing simple objects (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: Created 11 years, 4 months ago
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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. 1 // Copyright 2006-2008 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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125 __ j(equal, &rt_call); 125 __ j(equal, &rt_call);
126 126
127 // Now allocate the JSObject on the heap. 127 // Now allocate the JSObject on the heap.
128 // edi: constructor 128 // edi: constructor
129 // eax: initial map 129 // eax: initial map
130 __ movzx_b(edi, FieldOperand(eax, Map::kInstanceSizeOffset)); 130 __ movzx_b(edi, FieldOperand(eax, Map::kInstanceSizeOffset));
131 __ shl(edi, kPointerSizeLog2); 131 __ shl(edi, kPointerSizeLog2);
132 // Make sure that the maximum heap object size will never cause us 132 // Make sure that the maximum heap object size will never cause us
133 // problem here, because it is always greater than the maximum 133 // problem here, because it is always greater than the maximum
134 // instance size that can be represented in a byte. 134 // instance size that can be represented in a byte.
135 ASSERT(Heap::MaxObjectSizeInPagedSpace() >= (1 << kBitsPerByte)); 135 ASSERT(Heap::MaxObjectSizeInPagedSpace() >= JSObject::kMaxInstanceSize);
136 ExternalReference new_space_allocation_top = 136 ExternalReference new_space_allocation_top =
137 ExternalReference::new_space_allocation_top_address(); 137 ExternalReference::new_space_allocation_top_address();
138 __ mov(ebx, Operand::StaticVariable(new_space_allocation_top)); 138 __ mov(ebx, Operand::StaticVariable(new_space_allocation_top));
139 __ add(edi, Operand(ebx)); // Calculate new top 139 __ add(edi, Operand(ebx)); // Calculate new top
140 ExternalReference new_space_allocation_limit = 140 ExternalReference new_space_allocation_limit =
141 ExternalReference::new_space_allocation_limit_address(); 141 ExternalReference::new_space_allocation_limit_address();
142 __ cmp(edi, Operand::StaticVariable(new_space_allocation_limit)); 142 __ cmp(edi, Operand::StaticVariable(new_space_allocation_limit));
143 __ j(above_equal, &rt_call); 143 __ j(above_equal, &rt_call);
144 // Allocated the JSObject, now initialize the fields. 144 // Allocated the JSObject, now initialize the fields.
145 // eax: initial map 145 // eax: initial map
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774 // Dont adapt arguments. 774 // Dont adapt arguments.
775 // ------------------------------------------- 775 // -------------------------------------------
776 __ bind(&dont_adapt_arguments); 776 __ bind(&dont_adapt_arguments);
777 __ jmp(Operand(edx)); 777 __ jmp(Operand(edx));
778 } 778 }
779 779
780 780
781 #undef __ 781 #undef __
782 782
783 } } // namespace v8::internal 783 } } // namespace v8::internal
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