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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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| 83 int initial_capacity, | 83 int initial_capacity, |
| 84 Label* gc_required) { | 84 Label* gc_required) { |
| 85 ASSERT(initial_capacity > 0); | 85 ASSERT(initial_capacity > 0); |
| 86 // Load the initial map from the array function. | 86 // Load the initial map from the array function. |
| 87 __ ldr(scratch1, FieldMemOperand(array_function, | 87 __ ldr(scratch1, FieldMemOperand(array_function, |
| 88 JSFunction::kPrototypeOrInitialMapOffset)); | 88 JSFunction::kPrototypeOrInitialMapOffset)); |
| 89 | 89 |
| 90 // Allocate the JSArray object together with space for a fixed array with the | 90 // Allocate the JSArray object together with space for a fixed array with the |
| 91 // requested elements. | 91 // requested elements. |
| 92 int size = JSArray::kSize + FixedArray::SizeFor(initial_capacity); | 92 int size = JSArray::kSize + FixedArray::SizeFor(initial_capacity); |
| 93 __ AllocateObjectInNewSpace(size / kPointerSize, | 93 __ AllocateInNewSpace(size / kPointerSize, |
| 94 result, | 94 result, |
| 95 scratch2, | 95 scratch2, |
| 96 scratch3, | 96 scratch3, |
| 97 gc_required, | 97 gc_required, |
| 98 TAG_OBJECT); | 98 TAG_OBJECT); |
| 99 | 99 |
| 100 // Allocated the JSArray. Now initialize the fields except for the elements | 100 // Allocated the JSArray. Now initialize the fields except for the elements |
| 101 // array. | 101 // array. |
| 102 // result: JSObject | 102 // result: JSObject |
| 103 // scratch1: initial map | 103 // scratch1: initial map |
| 104 // scratch2: start of next object | 104 // scratch2: start of next object |
| 105 __ str(scratch1, FieldMemOperand(result, JSObject::kMapOffset)); | 105 __ str(scratch1, FieldMemOperand(result, JSObject::kMapOffset)); |
| 106 __ LoadRoot(scratch1, Heap::kEmptyFixedArrayRootIndex); | 106 __ LoadRoot(scratch1, Heap::kEmptyFixedArrayRootIndex); |
| 107 __ str(scratch1, FieldMemOperand(result, JSArray::kPropertiesOffset)); | 107 __ str(scratch1, FieldMemOperand(result, JSArray::kPropertiesOffset)); |
| 108 // Field JSArray::kElementsOffset is initialized later. | 108 // Field JSArray::kElementsOffset is initialized later. |
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| 167 JSFunction::kPrototypeOrInitialMapOffset)); | 167 JSFunction::kPrototypeOrInitialMapOffset)); |
| 168 | 168 |
| 169 // Check whether an empty sized array is requested. | 169 // Check whether an empty sized array is requested. |
| 170 __ tst(array_size, array_size); | 170 __ tst(array_size, array_size); |
| 171 __ b(nz, ¬_empty); | 171 __ b(nz, ¬_empty); |
| 172 | 172 |
| 173 // If an empty array is requested allocate a small elements array anyway. This | 173 // If an empty array is requested allocate a small elements array anyway. This |
| 174 // keeps the code below free of special casing for the empty array. | 174 // keeps the code below free of special casing for the empty array. |
| 175 int size = JSArray::kSize + | 175 int size = JSArray::kSize + |
| 176 FixedArray::SizeFor(JSArray::kPreallocatedArrayElements); | 176 FixedArray::SizeFor(JSArray::kPreallocatedArrayElements); |
| 177 __ AllocateObjectInNewSpace(size / kPointerSize, | 177 __ AllocateInNewSpace(size / kPointerSize, |
| 178 result, | 178 result, |
| 179 elements_array_end, | 179 elements_array_end, |
| 180 scratch1, | 180 scratch1, |
| 181 gc_required, | 181 gc_required, |
| 182 TAG_OBJECT); | 182 TAG_OBJECT); |
| 183 __ jmp(&allocated); | 183 __ jmp(&allocated); |
| 184 | 184 |
| 185 // Allocate the JSArray object together with space for a FixedArray with the | 185 // Allocate the JSArray object together with space for a FixedArray with the |
| 186 // requested number of elements. | 186 // requested number of elements. |
| 187 __ bind(¬_empty); | 187 __ bind(¬_empty); |
| 188 ASSERT(kSmiTagSize == 1 && kSmiTag == 0); | 188 ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
| 189 __ mov(elements_array_end, | 189 __ mov(elements_array_end, |
| 190 Operand((JSArray::kSize + FixedArray::kHeaderSize) / kPointerSize)); | 190 Operand((JSArray::kSize + FixedArray::kHeaderSize) / kPointerSize)); |
| 191 __ add(elements_array_end, | 191 __ add(elements_array_end, |
| 192 elements_array_end, | 192 elements_array_end, |
| 193 Operand(array_size, ASR, kSmiTagSize)); | 193 Operand(array_size, ASR, kSmiTagSize)); |
| 194 __ AllocateObjectInNewSpace(elements_array_end, | 194 __ AllocateInNewSpace(elements_array_end, |
| 195 result, | 195 result, |
| 196 scratch1, | 196 scratch1, |
| 197 scratch2, | 197 scratch2, |
| 198 gc_required, | 198 gc_required, |
| 199 TAG_OBJECT); | 199 TAG_OBJECT); |
| 200 | 200 |
| 201 // Allocated the JSArray. Now initialize the fields except for the elements | 201 // Allocated the JSArray. Now initialize the fields except for the elements |
| 202 // array. | 202 // array. |
| 203 // result: JSObject | 203 // result: JSObject |
| 204 // elements_array_storage: initial map | 204 // elements_array_storage: initial map |
| 205 // array_size: size of array (smi) | 205 // array_size: size of array (smi) |
| 206 __ bind(&allocated); | 206 __ bind(&allocated); |
| 207 __ str(elements_array_storage, FieldMemOperand(result, JSObject::kMapOffset)); | 207 __ str(elements_array_storage, FieldMemOperand(result, JSObject::kMapOffset)); |
| 208 __ LoadRoot(elements_array_storage, Heap::kEmptyFixedArrayRootIndex); | 208 __ LoadRoot(elements_array_storage, Heap::kEmptyFixedArrayRootIndex); |
| 209 __ str(elements_array_storage, | 209 __ str(elements_array_storage, |
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| 533 // r2: initial map | 533 // r2: initial map |
| 534 // r7: undefined | 534 // r7: undefined |
| 535 __ CompareInstanceType(r2, r3, JS_FUNCTION_TYPE); | 535 __ CompareInstanceType(r2, r3, JS_FUNCTION_TYPE); |
| 536 __ b(eq, &rt_call); | 536 __ b(eq, &rt_call); |
| 537 | 537 |
| 538 // Now allocate the JSObject on the heap. | 538 // Now allocate the JSObject on the heap. |
| 539 // r1: constructor function | 539 // r1: constructor function |
| 540 // r2: initial map | 540 // r2: initial map |
| 541 // r7: undefined | 541 // r7: undefined |
| 542 __ ldrb(r3, FieldMemOperand(r2, Map::kInstanceSizeOffset)); | 542 __ ldrb(r3, FieldMemOperand(r2, Map::kInstanceSizeOffset)); |
| 543 __ AllocateObjectInNewSpace(r3, r4, r5, r6, &rt_call, NO_ALLOCATION_FLAGS); | 543 __ AllocateInNewSpace(r3, r4, r5, r6, &rt_call, NO_ALLOCATION_FLAGS); |
| 544 | 544 |
| 545 // Allocated the JSObject, now initialize the fields. Map is set to initial | 545 // Allocated the JSObject, now initialize the fields. Map is set to initial |
| 546 // map and properties and elements are set to empty fixed array. | 546 // map and properties and elements are set to empty fixed array. |
| 547 // r1: constructor function | 547 // r1: constructor function |
| 548 // r2: initial map | 548 // r2: initial map |
| 549 // r3: object size | 549 // r3: object size |
| 550 // r4: JSObject (not tagged) | 550 // r4: JSObject (not tagged) |
| 551 // r7: undefined | 551 // r7: undefined |
| 552 __ LoadRoot(r6, Heap::kEmptyFixedArrayRootIndex); | 552 __ LoadRoot(r6, Heap::kEmptyFixedArrayRootIndex); |
| 553 __ mov(r5, r4); | 553 __ mov(r5, r4); |
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| 604 __ Assert(pl, "Property allocation count failed."); | 604 __ Assert(pl, "Property allocation count failed."); |
| 605 | 605 |
| 606 // Scale the number of elements by pointer size and add the header for | 606 // Scale the number of elements by pointer size and add the header for |
| 607 // FixedArrays to the start of the next object calculation from above. | 607 // FixedArrays to the start of the next object calculation from above. |
| 608 // r1: constructor | 608 // r1: constructor |
| 609 // r3: number of elements in properties array | 609 // r3: number of elements in properties array |
| 610 // r4: JSObject | 610 // r4: JSObject |
| 611 // r5: start of next object | 611 // r5: start of next object |
| 612 // r7: undefined | 612 // r7: undefined |
| 613 __ add(r0, r3, Operand(FixedArray::kHeaderSize / kPointerSize)); | 613 __ add(r0, r3, Operand(FixedArray::kHeaderSize / kPointerSize)); |
| 614 __ AllocateObjectInNewSpace(r0, | 614 __ AllocateInNewSpace(r0, |
| 615 r5, | 615 r5, |
| 616 r6, | 616 r6, |
| 617 r2, | 617 r2, |
| 618 &undo_allocation, | 618 &undo_allocation, |
| 619 RESULT_CONTAINS_TOP); | 619 RESULT_CONTAINS_TOP); |
| 620 | 620 |
| 621 // Initialize the FixedArray. | 621 // Initialize the FixedArray. |
| 622 // r1: constructor | 622 // r1: constructor |
| 623 // r3: number of elements in properties array | 623 // r3: number of elements in properties array |
| 624 // r4: JSObject | 624 // r4: JSObject |
| 625 // r5: FixedArray (not tagged) | 625 // r5: FixedArray (not tagged) |
| 626 // r7: undefined | 626 // r7: undefined |
| 627 __ LoadRoot(r6, Heap::kFixedArrayMapRootIndex); | 627 __ LoadRoot(r6, Heap::kFixedArrayMapRootIndex); |
| 628 __ mov(r2, r5); | 628 __ mov(r2, r5); |
| 629 ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset); | 629 ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset); |
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| 1278 // Dont adapt arguments. | 1278 // Dont adapt arguments. |
| 1279 // ------------------------------------------- | 1279 // ------------------------------------------- |
| 1280 __ bind(&dont_adapt_arguments); | 1280 __ bind(&dont_adapt_arguments); |
| 1281 __ Jump(r3); | 1281 __ Jump(r3); |
| 1282 } | 1282 } |
| 1283 | 1283 |
| 1284 | 1284 |
| 1285 #undef __ | 1285 #undef __ |
| 1286 | 1286 |
| 1287 } } // namespace v8::internal | 1287 } } // namespace v8::internal |
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