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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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| 107 // and filled with the hole values. | 107 // and filled with the hole values. |
| 108 static void AllocateEmptyJSArray(MacroAssembler* masm, | 108 static void AllocateEmptyJSArray(MacroAssembler* masm, |
| 109 Register array_function, | 109 Register array_function, |
| 110 Register result, | 110 Register result, |
| 111 Register scratch1, | 111 Register scratch1, |
| 112 Register scratch2, | 112 Register scratch2, |
| 113 Register scratch3, | 113 Register scratch3, |
| 114 Label* gc_required) { | 114 Label* gc_required) { |
| 115 const int initial_capacity = JSArray::kPreallocatedArrayElements; | 115 const int initial_capacity = JSArray::kPreallocatedArrayElements; |
| 116 STATIC_ASSERT(initial_capacity >= 0); | 116 STATIC_ASSERT(initial_capacity >= 0); |
| 117 // Load the initial map from the array function. | 117 __ LoadGlobalInitialConstructedArrayMap(array_function, scratch2, scratch1); |
| 118 __ ldr(scratch1, FieldMemOperand(array_function, | |
| 119 JSFunction::kPrototypeOrInitialMapOffset)); | |
| 120 | 118 |
| 121 // Allocate the JSArray object together with space for a fixed array with the | 119 // Allocate the JSArray object together with space for a fixed array with the |
| 122 // requested elements. | 120 // requested elements. |
| 123 int size = JSArray::kSize; | 121 int size = JSArray::kSize; |
| 124 if (initial_capacity > 0) { | 122 if (initial_capacity > 0) { |
| 125 size += FixedArray::SizeFor(initial_capacity); | 123 size += FixedArray::SizeFor(initial_capacity); |
| 126 } | 124 } |
| 127 __ AllocateInNewSpace(size, | 125 __ AllocateInNewSpace(size, |
| 128 result, | 126 result, |
| 129 scratch2, | 127 scratch2, |
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| 203 Register array_function, // Array function. | 201 Register array_function, // Array function. |
| 204 Register array_size, // As a smi, cannot be 0. | 202 Register array_size, // As a smi, cannot be 0. |
| 205 Register result, | 203 Register result, |
| 206 Register elements_array_storage, | 204 Register elements_array_storage, |
| 207 Register elements_array_end, | 205 Register elements_array_end, |
| 208 Register scratch1, | 206 Register scratch1, |
| 209 Register scratch2, | 207 Register scratch2, |
| 210 bool fill_with_hole, | 208 bool fill_with_hole, |
| 211 Label* gc_required) { | 209 Label* gc_required) { |
| 212 // Load the initial map from the array function. | 210 // Load the initial map from the array function. |
| 213 __ ldr(elements_array_storage, | 211 __ LoadGlobalInitialConstructedArrayMap(array_function, scratch2, |
| 214 FieldMemOperand(array_function, | 212 elements_array_storage); |
| 215 JSFunction::kPrototypeOrInitialMapOffset)); | |
| 216 | 213 |
| 217 if (FLAG_debug_code) { // Assert that array size is not zero. | 214 if (FLAG_debug_code) { // Assert that array size is not zero. |
| 218 __ tst(array_size, array_size); | 215 __ tst(array_size, array_size); |
| 219 __ Assert(ne, "array size is unexpectedly 0"); | 216 __ Assert(ne, "array size is unexpectedly 0"); |
| 220 } | 217 } |
| 221 | 218 |
| 222 // Allocate the JSArray object together with space for a FixedArray with the | 219 // Allocate the JSArray object together with space for a FixedArray with the |
| 223 // requested number of elements. | 220 // requested number of elements. |
| 224 STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); | 221 STATIC_ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
| 225 __ mov(elements_array_end, | 222 __ mov(elements_array_end, |
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| 1771 __ bind(&dont_adapt_arguments); | 1768 __ bind(&dont_adapt_arguments); |
| 1772 __ Jump(r3); | 1769 __ Jump(r3); |
| 1773 } | 1770 } |
| 1774 | 1771 |
| 1775 | 1772 |
| 1776 #undef __ | 1773 #undef __ |
| 1777 | 1774 |
| 1778 } } // namespace v8::internal | 1775 } } // namespace v8::internal |
| 1779 | 1776 |
| 1780 #endif // V8_TARGET_ARCH_ARM | 1777 #endif // V8_TARGET_ARCH_ARM |
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