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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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129 __ str(scratch3, FieldMemOperand(result, JSArray::kLengthOffset)); | 129 __ str(scratch3, FieldMemOperand(result, JSArray::kLengthOffset)); |
130 | 130 |
131 // Calculate the location of the elements array and set elements array member | 131 // Calculate the location of the elements array and set elements array member |
132 // of the JSArray. | 132 // of the JSArray. |
133 // result: JSObject | 133 // result: JSObject |
134 // scratch2: start of next object | 134 // scratch2: start of next object |
135 __ add(scratch1, result, Operand(JSArray::kSize)); | 135 __ add(scratch1, result, Operand(JSArray::kSize)); |
136 __ str(scratch1, FieldMemOperand(result, JSArray::kElementsOffset)); | 136 __ str(scratch1, FieldMemOperand(result, JSArray::kElementsOffset)); |
137 | 137 |
138 // Clear the heap tag on the elements array. | 138 // Clear the heap tag on the elements array. |
139 __ and_(scratch1, scratch1, Operand(~kHeapObjectTagMask)); | 139 ASSERT(kSmiTag == 0); |
| 140 __ sub(scratch1, scratch1, Operand(kHeapObjectTag)); |
140 | 141 |
141 // Initialize the FixedArray and fill it with holes. FixedArray length is | 142 // Initialize the FixedArray and fill it with holes. FixedArray length is |
142 // stored as a smi. | 143 // stored as a smi. |
143 // result: JSObject | 144 // result: JSObject |
144 // scratch1: elements array (untagged) | 145 // scratch1: elements array (untagged) |
145 // scratch2: start of next object | 146 // scratch2: start of next object |
146 __ LoadRoot(scratch3, Heap::kFixedArrayMapRootIndex); | 147 __ LoadRoot(scratch3, Heap::kFixedArrayMapRootIndex); |
147 ASSERT_EQ(0 * kPointerSize, FixedArray::kMapOffset); | 148 ASSERT_EQ(0 * kPointerSize, FixedArray::kMapOffset); |
148 __ str(scratch3, MemOperand(scratch1, kPointerSize, PostIndex)); | 149 __ str(scratch3, MemOperand(scratch1, kPointerSize, PostIndex)); |
149 __ mov(scratch3, Operand(Smi::FromInt(initial_capacity))); | 150 __ mov(scratch3, Operand(Smi::FromInt(initial_capacity))); |
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233 | 234 |
234 // Calculate the location of the elements array and set elements array member | 235 // Calculate the location of the elements array and set elements array member |
235 // of the JSArray. | 236 // of the JSArray. |
236 // result: JSObject | 237 // result: JSObject |
237 // array_size: size of array (smi) | 238 // array_size: size of array (smi) |
238 __ add(elements_array_storage, result, Operand(JSArray::kSize)); | 239 __ add(elements_array_storage, result, Operand(JSArray::kSize)); |
239 __ str(elements_array_storage, | 240 __ str(elements_array_storage, |
240 FieldMemOperand(result, JSArray::kElementsOffset)); | 241 FieldMemOperand(result, JSArray::kElementsOffset)); |
241 | 242 |
242 // Clear the heap tag on the elements array. | 243 // Clear the heap tag on the elements array. |
243 __ and_(elements_array_storage, | 244 ASSERT(kSmiTag == 0); |
244 elements_array_storage, | 245 __ sub(elements_array_storage, |
245 Operand(~kHeapObjectTagMask)); | 246 elements_array_storage, |
| 247 Operand(kHeapObjectTag)); |
246 // Initialize the fixed array and fill it with holes. FixedArray length is | 248 // Initialize the fixed array and fill it with holes. FixedArray length is |
247 // stored as a smi. | 249 // stored as a smi. |
248 // result: JSObject | 250 // result: JSObject |
249 // elements_array_storage: elements array (untagged) | 251 // elements_array_storage: elements array (untagged) |
250 // array_size: size of array (smi) | 252 // array_size: size of array (smi) |
251 __ LoadRoot(scratch1, Heap::kFixedArrayMapRootIndex); | 253 __ LoadRoot(scratch1, Heap::kFixedArrayMapRootIndex); |
252 ASSERT_EQ(0 * kPointerSize, FixedArray::kMapOffset); | 254 ASSERT_EQ(0 * kPointerSize, FixedArray::kMapOffset); |
253 __ str(scratch1, MemOperand(elements_array_storage, kPointerSize, PostIndex)); | 255 __ str(scratch1, MemOperand(elements_array_storage, kPointerSize, PostIndex)); |
254 ASSERT(kSmiTag == 0); | 256 ASSERT(kSmiTag == 0); |
255 __ tst(array_size, array_size); | 257 __ tst(array_size, array_size); |
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610 // Check if a non-empty properties array is needed. Continue with allocated | 612 // Check if a non-empty properties array is needed. Continue with allocated |
611 // object if not fall through to runtime call if it is. | 613 // object if not fall through to runtime call if it is. |
612 // r1: constructor function | 614 // r1: constructor function |
613 // r4: JSObject | 615 // r4: JSObject |
614 // r5: start of next object (not tagged) | 616 // r5: start of next object (not tagged) |
615 // r7: undefined value | 617 // r7: undefined value |
616 __ ldrb(r3, FieldMemOperand(r2, Map::kUnusedPropertyFieldsOffset)); | 618 __ ldrb(r3, FieldMemOperand(r2, Map::kUnusedPropertyFieldsOffset)); |
617 // The field instance sizes contains both pre-allocated property fields and | 619 // The field instance sizes contains both pre-allocated property fields and |
618 // in-object properties. | 620 // in-object properties. |
619 __ ldr(r0, FieldMemOperand(r2, Map::kInstanceSizesOffset)); | 621 __ ldr(r0, FieldMemOperand(r2, Map::kInstanceSizesOffset)); |
620 __ and_(r6, | 622 __ Ubfx(r6, r0, Map::kPreAllocatedPropertyFieldsByte * 8, 8); |
621 r0, | 623 __ add(r3, r3, Operand(r6)); |
622 Operand(0x000000FF << Map::kPreAllocatedPropertyFieldsByte * 8)); | 624 __ Ubfx(r6, r0, Map::kInObjectPropertiesByte * 8, 8); |
623 __ add(r3, r3, Operand(r6, LSR, Map::kPreAllocatedPropertyFieldsByte * 8)); | 625 __ sub(r3, r3, Operand(r6), SetCC); |
624 __ and_(r6, r0, Operand(0x000000FF << Map::kInObjectPropertiesByte * 8)); | |
625 __ sub(r3, r3, Operand(r6, LSR, Map::kInObjectPropertiesByte * 8), SetCC); | |
626 | 626 |
627 // Done if no extra properties are to be allocated. | 627 // Done if no extra properties are to be allocated. |
628 __ b(eq, &allocated); | 628 __ b(eq, &allocated); |
629 __ Assert(pl, "Property allocation count failed."); | 629 __ Assert(pl, "Property allocation count failed."); |
630 | 630 |
631 // Scale the number of elements by pointer size and add the header for | 631 // Scale the number of elements by pointer size and add the header for |
632 // FixedArrays to the start of the next object calculation from above. | 632 // FixedArrays to the start of the next object calculation from above. |
633 // r1: constructor | 633 // r1: constructor |
634 // r3: number of elements in properties array | 634 // r3: number of elements in properties array |
635 // r4: JSObject | 635 // r4: JSObject |
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1311 __ bind(&dont_adapt_arguments); | 1311 __ bind(&dont_adapt_arguments); |
1312 __ Jump(r3); | 1312 __ Jump(r3); |
1313 } | 1313 } |
1314 | 1314 |
1315 | 1315 |
1316 #undef __ | 1316 #undef __ |
1317 | 1317 |
1318 } } // namespace v8::internal | 1318 } } // namespace v8::internal |
1319 | 1319 |
1320 #endif // V8_TARGET_ARCH_ARM | 1320 #endif // V8_TARGET_ARCH_ARM |
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