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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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