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Issue 174600: Add allocation support to ia32 macro assembler (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 11 years, 3 months ago
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1 // Copyright 2006-2009 the V8 project authors. All rights reserved. 1 // Copyright 2006-2009 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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1779 1779
1780 // Now allocate the JSObject on the heap by moving the new space allocation 1780 // Now allocate the JSObject on the heap by moving the new space allocation
1781 // top forward. 1781 // top forward.
1782 // edi: constructor 1782 // edi: constructor
1783 // ebx: initial map 1783 // ebx: initial map
1784 __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceSizeOffset)); 1784 __ movzx_b(ecx, FieldOperand(ebx, Map::kInstanceSizeOffset));
1785 __ shl(ecx, kPointerSizeLog2); 1785 __ shl(ecx, kPointerSizeLog2);
1786 // Make sure that the maximum heap object size will never cause us 1786 // Make sure that the maximum heap object size will never cause us
1787 // problems here. 1787 // problems here.
1788 ASSERT(Heap::MaxObjectSizeInPagedSpace() >= JSObject::kMaxInstanceSize); 1788 ASSERT(Heap::MaxObjectSizeInPagedSpace() >= JSObject::kMaxInstanceSize);
1789 ExternalReference new_space_allocation_top = 1789 __ AllocateObjectInNewSpace(ecx, edx, ecx, no_reg, &generic_stub_call, false);
1790 ExternalReference::new_space_allocation_top_address();
1791 __ mov(edx, Operand::StaticVariable(new_space_allocation_top));
1792 __ add(ecx, Operand(edx)); // Calculate new top.
1793 ExternalReference new_space_allocation_limit =
1794 ExternalReference::new_space_allocation_limit_address();
1795 __ cmp(ecx, Operand::StaticVariable(new_space_allocation_limit));
1796 __ j(above_equal, &generic_stub_call);
1797
1798 // Update new space top.
1799 __ mov(Operand::StaticVariable(new_space_allocation_top), ecx);
1800 1790
1801 // Allocated the JSObject, now initialize the fields and add the heap tag. 1791 // Allocated the JSObject, now initialize the fields and add the heap tag.
1802 // ebx: initial map 1792 // ebx: initial map
1803 // edx: JSObject 1793 // edx: JSObject
1804 __ mov(Operand(edx, JSObject::kMapOffset), ebx); 1794 __ mov(Operand(edx, JSObject::kMapOffset), ebx);
1805 __ mov(ebx, Factory::empty_fixed_array()); 1795 __ mov(ebx, Factory::empty_fixed_array());
1806 __ mov(Operand(edx, JSObject::kPropertiesOffset), ebx); 1796 __ mov(Operand(edx, JSObject::kPropertiesOffset), ebx);
1807 __ mov(Operand(edx, JSObject::kElementsOffset), ebx); 1797 __ mov(Operand(edx, JSObject::kElementsOffset), ebx);
1808 __ or_(Operand(edx), Immediate(kHeapObjectTag)); 1798 __ or_(Operand(edx), Immediate(kHeapObjectTag));
1809 1799
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1853 for (int i = shared->this_property_assignments_count(); 1843 for (int i = shared->this_property_assignments_count();
1854 i < shared->CalculateInObjectProperties(); 1844 i < shared->CalculateInObjectProperties();
1855 i++) { 1845 i++) {
1856 __ mov(Operand(edx, i * kPointerSize), edi); 1846 __ mov(Operand(edx, i * kPointerSize), edi);
1857 } 1847 }
1858 1848
1859 // Move argc to ebx and retreive the JSObject to return. 1849 // Move argc to ebx and retreive the JSObject to return.
1860 __ mov(ebx, eax); 1850 __ mov(ebx, eax);
1861 __ pop(eax); 1851 __ pop(eax);
1862 1852
1863 // Remove caller arguments from the stack and return. 1853 // Remove caller arguments and receiver from the stack and return.
1864 __ pop(ecx); 1854 __ pop(ecx);
1865 __ lea(esp, Operand(esp, ebx, times_4, 1 * kPointerSize)); // 1 ~ receiver 1855 __ lea(esp, Operand(esp, ebx, times_pointer_size, 1 * kPointerSize));
1866 __ push(ecx); 1856 __ push(ecx);
1867 __ IncrementCounter(&Counters::constructed_objects, 1); 1857 __ IncrementCounter(&Counters::constructed_objects, 1);
1868 __ IncrementCounter(&Counters::constructed_objects_stub, 1); 1858 __ IncrementCounter(&Counters::constructed_objects_stub, 1);
1869 __ ret(0); 1859 __ ret(0);
1870 1860
1871 // Jump to the generic stub in case the specialized code cannot handle the 1861 // Jump to the generic stub in case the specialized code cannot handle the
1872 // construction. 1862 // construction.
1873 __ bind(&generic_stub_call); 1863 __ bind(&generic_stub_call);
1874 Code* code = Builtins::builtin(Builtins::JSConstructStubGeneric); 1864 Code* code = Builtins::builtin(Builtins::JSConstructStubGeneric);
1875 Handle<Code> generic_construct_stub(code); 1865 Handle<Code> generic_construct_stub(code);
1876 __ jmp(generic_construct_stub, RelocInfo::CODE_TARGET); 1866 __ jmp(generic_construct_stub, RelocInfo::CODE_TARGET);
1877 1867
1878 // Return the generated code. 1868 // Return the generated code.
1879 return GetCode(); 1869 return GetCode();
1880 } 1870 }
1881 1871
1882 1872
1883 #undef __ 1873 #undef __
1884 1874
1885 } } // namespace v8::internal 1875 } } // namespace v8::internal
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