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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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| 100 int initial_capacity, | 100 int initial_capacity, |
| 101 Label* gc_required) { | 101 Label* gc_required) { |
| 102 ASSERT(initial_capacity > 0); | 102 ASSERT(initial_capacity > 0); |
| 103 // Load the initial map from the array function. | 103 // Load the initial map from the array function. |
| 104 __ ldr(scratch1, FieldMemOperand(array_function, | 104 __ ldr(scratch1, FieldMemOperand(array_function, |
| 105 JSFunction::kPrototypeOrInitialMapOffset)); | 105 JSFunction::kPrototypeOrInitialMapOffset)); |
| 106 | 106 |
| 107 // Allocate the JSArray object together with space for a fixed array with the | 107 // Allocate the JSArray object together with space for a fixed array with the |
| 108 // requested elements. | 108 // requested elements. |
| 109 int size = JSArray::kSize + FixedArray::SizeFor(initial_capacity); | 109 int size = JSArray::kSize + FixedArray::SizeFor(initial_capacity); |
| 110 __ AllocateInNewSpace(size / kPointerSize, | 110 __ AllocateInNewSpace(size, |
| 111 result, | 111 result, |
| 112 scratch2, | 112 scratch2, |
| 113 scratch3, | 113 scratch3, |
| 114 gc_required, | 114 gc_required, |
| 115 TAG_OBJECT); | 115 TAG_OBJECT); |
| 116 | 116 |
| 117 // Allocated the JSArray. Now initialize the fields except for the elements | 117 // Allocated the JSArray. Now initialize the fields except for the elements |
| 118 // array. | 118 // array. |
| 119 // result: JSObject | 119 // result: JSObject |
| 120 // scratch1: initial map | 120 // scratch1: initial map |
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| 184 JSFunction::kPrototypeOrInitialMapOffset)); | 184 JSFunction::kPrototypeOrInitialMapOffset)); |
| 185 | 185 |
| 186 // Check whether an empty sized array is requested. | 186 // Check whether an empty sized array is requested. |
| 187 __ tst(array_size, array_size); | 187 __ tst(array_size, array_size); |
| 188 __ b(nz, ¬_empty); | 188 __ b(nz, ¬_empty); |
| 189 | 189 |
| 190 // If an empty array is requested allocate a small elements array anyway. This | 190 // If an empty array is requested allocate a small elements array anyway. This |
| 191 // keeps the code below free of special casing for the empty array. | 191 // keeps the code below free of special casing for the empty array. |
| 192 int size = JSArray::kSize + | 192 int size = JSArray::kSize + |
| 193 FixedArray::SizeFor(JSArray::kPreallocatedArrayElements); | 193 FixedArray::SizeFor(JSArray::kPreallocatedArrayElements); |
| 194 __ AllocateInNewSpace(size / kPointerSize, | 194 __ AllocateInNewSpace(size, |
| 195 result, | 195 result, |
| 196 elements_array_end, | 196 elements_array_end, |
| 197 scratch1, | 197 scratch1, |
| 198 gc_required, | 198 gc_required, |
| 199 TAG_OBJECT); | 199 TAG_OBJECT); |
| 200 __ jmp(&allocated); | 200 __ jmp(&allocated); |
| 201 | 201 |
| 202 // Allocate the JSArray object together with space for a FixedArray with the | 202 // Allocate the JSArray object together with space for a FixedArray with the |
| 203 // requested number of elements. | 203 // requested number of elements. |
| 204 __ bind(¬_empty); | 204 __ bind(¬_empty); |
| 205 ASSERT(kSmiTagSize == 1 && kSmiTag == 0); | 205 ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
| 206 __ mov(elements_array_end, | 206 __ mov(elements_array_end, |
| 207 Operand((JSArray::kSize + FixedArray::kHeaderSize) / kPointerSize)); | 207 Operand((JSArray::kSize + FixedArray::kHeaderSize) / kPointerSize)); |
| 208 __ add(elements_array_end, | 208 __ add(elements_array_end, |
| 209 elements_array_end, | 209 elements_array_end, |
| 210 Operand(array_size, ASR, kSmiTagSize)); | 210 Operand(array_size, ASR, kSmiTagSize)); |
| 211 __ AllocateInNewSpace(elements_array_end, | 211 __ AllocateInNewSpace( |
| 212 result, | 212 elements_array_end, |
| 213 scratch1, | 213 result, |
| 214 scratch2, | 214 scratch1, |
| 215 gc_required, | 215 scratch2, |
| 216 TAG_OBJECT); | 216 gc_required, |
| 217 static_cast<AllocationFlags>(TAG_OBJECT | SIZE_IN_WORDS)); |
| 217 | 218 |
| 218 // Allocated the JSArray. Now initialize the fields except for the elements | 219 // Allocated the JSArray. Now initialize the fields except for the elements |
| 219 // array. | 220 // array. |
| 220 // result: JSObject | 221 // result: JSObject |
| 221 // elements_array_storage: initial map | 222 // elements_array_storage: initial map |
| 222 // array_size: size of array (smi) | 223 // array_size: size of array (smi) |
| 223 __ bind(&allocated); | 224 __ bind(&allocated); |
| 224 __ str(elements_array_storage, FieldMemOperand(result, JSObject::kMapOffset)); | 225 __ str(elements_array_storage, FieldMemOperand(result, JSObject::kMapOffset)); |
| 225 __ LoadRoot(elements_array_storage, Heap::kEmptyFixedArrayRootIndex); | 226 __ LoadRoot(elements_array_storage, Heap::kEmptyFixedArrayRootIndex); |
| 226 __ str(elements_array_storage, | 227 __ str(elements_array_storage, |
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| 554 // r2: initial map | 555 // r2: initial map |
| 555 // r7: undefined | 556 // r7: undefined |
| 556 __ CompareInstanceType(r2, r3, JS_FUNCTION_TYPE); | 557 __ CompareInstanceType(r2, r3, JS_FUNCTION_TYPE); |
| 557 __ b(eq, &rt_call); | 558 __ b(eq, &rt_call); |
| 558 | 559 |
| 559 // Now allocate the JSObject on the heap. | 560 // Now allocate the JSObject on the heap. |
| 560 // r1: constructor function | 561 // r1: constructor function |
| 561 // r2: initial map | 562 // r2: initial map |
| 562 // r7: undefined | 563 // r7: undefined |
| 563 __ ldrb(r3, FieldMemOperand(r2, Map::kInstanceSizeOffset)); | 564 __ ldrb(r3, FieldMemOperand(r2, Map::kInstanceSizeOffset)); |
| 564 __ AllocateInNewSpace(r3, r4, r5, r6, &rt_call, NO_ALLOCATION_FLAGS); | 565 __ AllocateInNewSpace(r3, r4, r5, r6, &rt_call, SIZE_IN_WORDS); |
| 565 | 566 |
| 566 // Allocated the JSObject, now initialize the fields. Map is set to initial | 567 // Allocated the JSObject, now initialize the fields. Map is set to initial |
| 567 // map and properties and elements are set to empty fixed array. | 568 // map and properties and elements are set to empty fixed array. |
| 568 // r1: constructor function | 569 // r1: constructor function |
| 569 // r2: initial map | 570 // r2: initial map |
| 570 // r3: object size | 571 // r3: object size |
| 571 // r4: JSObject (not tagged) | 572 // r4: JSObject (not tagged) |
| 572 // r7: undefined | 573 // r7: undefined |
| 573 __ LoadRoot(r6, Heap::kEmptyFixedArrayRootIndex); | 574 __ LoadRoot(r6, Heap::kEmptyFixedArrayRootIndex); |
| 574 __ mov(r5, r4); | 575 __ mov(r5, r4); |
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| 625 __ Assert(pl, "Property allocation count failed."); | 626 __ Assert(pl, "Property allocation count failed."); |
| 626 | 627 |
| 627 // Scale the number of elements by pointer size and add the header for | 628 // Scale the number of elements by pointer size and add the header for |
| 628 // FixedArrays to the start of the next object calculation from above. | 629 // FixedArrays to the start of the next object calculation from above. |
| 629 // r1: constructor | 630 // r1: constructor |
| 630 // r3: number of elements in properties array | 631 // r3: number of elements in properties array |
| 631 // r4: JSObject | 632 // r4: JSObject |
| 632 // r5: start of next object | 633 // r5: start of next object |
| 633 // r7: undefined | 634 // r7: undefined |
| 634 __ add(r0, r3, Operand(FixedArray::kHeaderSize / kPointerSize)); | 635 __ add(r0, r3, Operand(FixedArray::kHeaderSize / kPointerSize)); |
| 635 __ AllocateInNewSpace(r0, | 636 __ AllocateInNewSpace( |
| 636 r5, | 637 r0, |
| 637 r6, | 638 r5, |
| 638 r2, | 639 r6, |
| 639 &undo_allocation, | 640 r2, |
| 640 RESULT_CONTAINS_TOP); | 641 &undo_allocation, |
| 642 static_cast<AllocationFlags>(RESULT_CONTAINS_TOP | SIZE_IN_WORDS)); |
| 641 | 643 |
| 642 // Initialize the FixedArray. | 644 // Initialize the FixedArray. |
| 643 // r1: constructor | 645 // r1: constructor |
| 644 // r3: number of elements in properties array | 646 // r3: number of elements in properties array |
| 645 // r4: JSObject | 647 // r4: JSObject |
| 646 // r5: FixedArray (not tagged) | 648 // r5: FixedArray (not tagged) |
| 647 // r7: undefined | 649 // r7: undefined |
| 648 __ LoadRoot(r6, Heap::kFixedArrayMapRootIndex); | 650 __ LoadRoot(r6, Heap::kFixedArrayMapRootIndex); |
| 649 __ mov(r2, r5); | 651 __ mov(r2, r5); |
| 650 ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset); | 652 ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset); |
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| 1302 // Dont adapt arguments. | 1304 // Dont adapt arguments. |
| 1303 // ------------------------------------------- | 1305 // ------------------------------------------- |
| 1304 __ bind(&dont_adapt_arguments); | 1306 __ bind(&dont_adapt_arguments); |
| 1305 __ Jump(r3); | 1307 __ Jump(r3); |
| 1306 } | 1308 } |
| 1307 | 1309 |
| 1308 | 1310 |
| 1309 #undef __ | 1311 #undef __ |
| 1310 | 1312 |
| 1311 } } // namespace v8::internal | 1313 } } // namespace v8::internal |
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