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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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