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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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122 // edi: constructor | 122 // edi: constructor |
123 // eax: initial map | 123 // eax: initial map |
124 __ CmpInstanceType(eax, JS_FUNCTION_TYPE); | 124 __ CmpInstanceType(eax, JS_FUNCTION_TYPE); |
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 __ AllocateObjectInNewSpace(edi, | 132 __ AllocateInNewSpace(edi, ebx, edi, no_reg, &rt_call, NO_ALLOCATION_FLAGS); |
133 ebx, | |
134 edi, | |
135 no_reg, | |
136 &rt_call, | |
137 NO_ALLOCATION_FLAGS); | |
138 // Allocated the JSObject, now initialize the fields. | 133 // Allocated the JSObject, now initialize the fields. |
139 // eax: initial map | 134 // eax: initial map |
140 // ebx: JSObject | 135 // ebx: JSObject |
141 // edi: start of next object | 136 // edi: start of next object |
142 __ mov(Operand(ebx, JSObject::kMapOffset), eax); | 137 __ mov(Operand(ebx, JSObject::kMapOffset), eax); |
143 __ mov(ecx, Factory::empty_fixed_array()); | 138 __ mov(ecx, Factory::empty_fixed_array()); |
144 __ mov(Operand(ebx, JSObject::kPropertiesOffset), ecx); | 139 __ mov(Operand(ebx, JSObject::kPropertiesOffset), ecx); |
145 __ mov(Operand(ebx, JSObject::kElementsOffset), ecx); | 140 __ mov(Operand(ebx, JSObject::kElementsOffset), ecx); |
146 // Set extra fields in the newly allocated object. | 141 // Set extra fields in the newly allocated object. |
147 // eax: initial map | 142 // eax: initial map |
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182 __ sub(edx, Operand(ecx)); | 177 __ sub(edx, Operand(ecx)); |
183 // Done if no extra properties are to be allocated. | 178 // Done if no extra properties are to be allocated. |
184 __ j(zero, &allocated); | 179 __ j(zero, &allocated); |
185 __ Assert(positive, "Property allocation count failed."); | 180 __ Assert(positive, "Property allocation count failed."); |
186 | 181 |
187 // Scale the number of elements by pointer size and add the header for | 182 // Scale the number of elements by pointer size and add the header for |
188 // FixedArrays to the start of the next object calculation from above. | 183 // FixedArrays to the start of the next object calculation from above. |
189 // ebx: JSObject | 184 // ebx: JSObject |
190 // edi: start of next object (will be start of FixedArray) | 185 // edi: start of next object (will be start of FixedArray) |
191 // edx: number of elements in properties array | 186 // edx: number of elements in properties array |
192 __ AllocateObjectInNewSpace(FixedArray::kHeaderSize, | 187 __ AllocateInNewSpace(FixedArray::kHeaderSize, |
193 times_pointer_size, | 188 times_pointer_size, |
194 edx, | 189 edx, |
195 edi, | 190 edi, |
196 ecx, | 191 ecx, |
197 no_reg, | 192 no_reg, |
198 &undo_allocation, | 193 &undo_allocation, |
199 RESULT_CONTAINS_TOP); | 194 RESULT_CONTAINS_TOP); |
200 | 195 |
201 // Initialize the FixedArray. | 196 // Initialize the FixedArray. |
202 // ebx: JSObject | 197 // ebx: JSObject |
203 // edi: FixedArray | 198 // edi: FixedArray |
204 // edx: number of elements | 199 // edx: number of elements |
205 // ecx: start of next object | 200 // ecx: start of next object |
206 __ mov(eax, Factory::fixed_array_map()); | 201 __ mov(eax, Factory::fixed_array_map()); |
207 __ mov(Operand(edi, JSObject::kMapOffset), eax); // setup the map | 202 __ mov(Operand(edi, JSObject::kMapOffset), eax); // setup the map |
208 __ mov(Operand(edi, Array::kLengthOffset), edx); // and length | 203 __ mov(Operand(edi, Array::kLengthOffset), edx); // and length |
209 | 204 |
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690 // Load the initial map from the array function. | 685 // Load the initial map from the array function. |
691 __ mov(scratch1, FieldOperand(array_function, | 686 __ mov(scratch1, FieldOperand(array_function, |
692 JSFunction::kPrototypeOrInitialMapOffset)); | 687 JSFunction::kPrototypeOrInitialMapOffset)); |
693 | 688 |
694 // Allocate the JSArray object together with space for a fixed array with the | 689 // Allocate the JSArray object together with space for a fixed array with the |
695 // requested elements. | 690 // requested elements. |
696 int size = JSArray::kSize; | 691 int size = JSArray::kSize; |
697 if (initial_capacity > 0) { | 692 if (initial_capacity > 0) { |
698 size += FixedArray::SizeFor(initial_capacity); | 693 size += FixedArray::SizeFor(initial_capacity); |
699 } | 694 } |
700 __ AllocateObjectInNewSpace(size, | 695 __ AllocateInNewSpace(size, |
701 result, | 696 result, |
702 scratch2, | 697 scratch2, |
703 scratch3, | 698 scratch3, |
704 gc_required, | 699 gc_required, |
705 TAG_OBJECT); | 700 TAG_OBJECT); |
706 | 701 |
707 // Allocated the JSArray. Now initialize the fields except for the elements | 702 // Allocated the JSArray. Now initialize the fields except for the elements |
708 // array. | 703 // array. |
709 // result: JSObject | 704 // result: JSObject |
710 // scratch1: initial map | 705 // scratch1: initial map |
711 // scratch2: start of next object | 706 // scratch2: start of next object |
712 __ mov(FieldOperand(result, JSObject::kMapOffset), scratch1); | 707 __ mov(FieldOperand(result, JSObject::kMapOffset), scratch1); |
713 __ mov(FieldOperand(result, JSArray::kPropertiesOffset), | 708 __ mov(FieldOperand(result, JSArray::kPropertiesOffset), |
714 Factory::empty_fixed_array()); | 709 Factory::empty_fixed_array()); |
715 // Field JSArray::kElementsOffset is initialized later. | 710 // Field JSArray::kElementsOffset is initialized later. |
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791 FieldOperand(array_function, | 786 FieldOperand(array_function, |
792 JSFunction::kPrototypeOrInitialMapOffset)); | 787 JSFunction::kPrototypeOrInitialMapOffset)); |
793 | 788 |
794 // Check whether an empty sized array is requested. | 789 // Check whether an empty sized array is requested. |
795 __ test(array_size, Operand(array_size)); | 790 __ test(array_size, Operand(array_size)); |
796 __ j(not_zero, ¬_empty); | 791 __ j(not_zero, ¬_empty); |
797 | 792 |
798 // If an empty array is requested allocate a small elements array anyway. This | 793 // If an empty array is requested allocate a small elements array anyway. This |
799 // keeps the code below free of special casing for the empty array. | 794 // keeps the code below free of special casing for the empty array. |
800 int size = JSArray::kSize + FixedArray::SizeFor(kPreallocatedArrayElements); | 795 int size = JSArray::kSize + FixedArray::SizeFor(kPreallocatedArrayElements); |
801 __ AllocateObjectInNewSpace(size, | 796 __ AllocateInNewSpace(size, |
802 result, | 797 result, |
803 elements_array_end, | 798 elements_array_end, |
804 scratch, | 799 scratch, |
805 gc_required, | 800 gc_required, |
806 TAG_OBJECT); | 801 TAG_OBJECT); |
807 __ jmp(&allocated); | 802 __ jmp(&allocated); |
808 | 803 |
809 // Allocate the JSArray object together with space for a FixedArray with the | 804 // Allocate the JSArray object together with space for a FixedArray with the |
810 // requested elements. | 805 // requested elements. |
811 __ bind(¬_empty); | 806 __ bind(¬_empty); |
812 ASSERT(kSmiTagSize == 1 && kSmiTag == 0); | 807 ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
813 __ AllocateObjectInNewSpace(JSArray::kSize + FixedArray::kHeaderSize, | 808 __ AllocateInNewSpace(JSArray::kSize + FixedArray::kHeaderSize, |
814 times_half_pointer_size, // array_size is a smi. | 809 times_half_pointer_size, // array_size is a smi. |
815 array_size, | 810 array_size, |
816 result, | 811 result, |
817 elements_array_end, | 812 elements_array_end, |
818 scratch, | 813 scratch, |
819 gc_required, | 814 gc_required, |
820 TAG_OBJECT); | 815 TAG_OBJECT); |
821 | 816 |
822 // Allocated the JSArray. Now initialize the fields except for the elements | 817 // Allocated the JSArray. Now initialize the fields except for the elements |
823 // array. | 818 // array. |
824 // result: JSObject | 819 // result: JSObject |
825 // elements_array: initial map | 820 // elements_array: initial map |
826 // elements_array_end: start of next object | 821 // elements_array_end: start of next object |
827 // array_size: size of array (smi) | 822 // array_size: size of array (smi) |
828 __ bind(&allocated); | 823 __ bind(&allocated); |
829 __ mov(FieldOperand(result, JSObject::kMapOffset), elements_array); | 824 __ mov(FieldOperand(result, JSObject::kMapOffset), elements_array); |
830 __ mov(elements_array, Factory::empty_fixed_array()); | 825 __ mov(elements_array, Factory::empty_fixed_array()); |
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1229 // Dont adapt arguments. | 1224 // Dont adapt arguments. |
1230 // ------------------------------------------- | 1225 // ------------------------------------------- |
1231 __ bind(&dont_adapt_arguments); | 1226 __ bind(&dont_adapt_arguments); |
1232 __ jmp(Operand(edx)); | 1227 __ jmp(Operand(edx)); |
1233 } | 1228 } |
1234 | 1229 |
1235 | 1230 |
1236 #undef __ | 1231 #undef __ |
1237 | 1232 |
1238 } } // namespace v8::internal | 1233 } } // namespace v8::internal |
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