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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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| 138 } | 138 } |
| 139 | 139 |
| 140 | 140 |
| 141 // ------------------------------------------------------------------------- | 141 // ------------------------------------------------------------------------- |
| 142 // Code generators | 142 // Code generators |
| 143 | 143 |
| 144 #define __ ACCESS_MASM(masm) | 144 #define __ ACCESS_MASM(masm) |
| 145 | 145 |
| 146 void ElementsTransitionGenerator::GenerateMapChangeElementsTransition( | 146 void ElementsTransitionGenerator::GenerateMapChangeElementsTransition( |
| 147 MacroAssembler* masm, AllocationSiteMode mode, | 147 MacroAssembler* masm, AllocationSiteMode mode, |
| 148 Label* allocation_site_info_found) { | 148 Label* allocation_memento_found) { |
| 149 // ----------- S t a t e ------------- | 149 // ----------- S t a t e ------------- |
| 150 // -- a0 : value | 150 // -- a0 : value |
| 151 // -- a1 : key | 151 // -- a1 : key |
| 152 // -- a2 : receiver | 152 // -- a2 : receiver |
| 153 // -- ra : return address | 153 // -- ra : return address |
| 154 // -- a3 : target map, scratch for subsequent call | 154 // -- a3 : target map, scratch for subsequent call |
| 155 // -- t0 : scratch (elements) | 155 // -- t0 : scratch (elements) |
| 156 // ----------------------------------- | 156 // ----------------------------------- |
| 157 if (mode == TRACK_ALLOCATION_SITE) { | 157 if (mode == TRACK_ALLOCATION_SITE) { |
| 158 ASSERT(allocation_site_info_found != NULL); | 158 ASSERT(allocation_memento_found != NULL); |
| 159 masm->TestJSArrayForAllocationSiteInfo(a2, t0, eq, | 159 masm->TestJSArrayForAllocationMemento(a2, t0, eq, |
| 160 allocation_site_info_found); | 160 allocation_memento_found); |
| 161 } | 161 } |
| 162 | 162 |
| 163 // Set transitioned map. | 163 // Set transitioned map. |
| 164 __ sw(a3, FieldMemOperand(a2, HeapObject::kMapOffset)); | 164 __ sw(a3, FieldMemOperand(a2, HeapObject::kMapOffset)); |
| 165 __ RecordWriteField(a2, | 165 __ RecordWriteField(a2, |
| 166 HeapObject::kMapOffset, | 166 HeapObject::kMapOffset, |
| 167 a3, | 167 a3, |
| 168 t5, | 168 t5, |
| 169 kRAHasNotBeenSaved, | 169 kRAHasNotBeenSaved, |
| 170 kDontSaveFPRegs, | 170 kDontSaveFPRegs, |
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| 181 // -- a2 : receiver | 181 // -- a2 : receiver |
| 182 // -- ra : return address | 182 // -- ra : return address |
| 183 // -- a3 : target map, scratch for subsequent call | 183 // -- a3 : target map, scratch for subsequent call |
| 184 // -- t0 : scratch (elements) | 184 // -- t0 : scratch (elements) |
| 185 // ----------------------------------- | 185 // ----------------------------------- |
| 186 Label loop, entry, convert_hole, gc_required, only_change_map, done; | 186 Label loop, entry, convert_hole, gc_required, only_change_map, done; |
| 187 | 187 |
| 188 Register scratch = t6; | 188 Register scratch = t6; |
| 189 | 189 |
| 190 if (mode == TRACK_ALLOCATION_SITE) { | 190 if (mode == TRACK_ALLOCATION_SITE) { |
| 191 masm->TestJSArrayForAllocationSiteInfo(a2, t0, eq, fail); | 191 masm->TestJSArrayForAllocationMemento(a2, t0, eq, fail); |
| 192 } | 192 } |
| 193 | 193 |
| 194 // Check for empty arrays, which only require a map transition and no changes | 194 // Check for empty arrays, which only require a map transition and no changes |
| 195 // to the backing store. | 195 // to the backing store. |
| 196 __ lw(t0, FieldMemOperand(a2, JSObject::kElementsOffset)); | 196 __ lw(t0, FieldMemOperand(a2, JSObject::kElementsOffset)); |
| 197 __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex); | 197 __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex); |
| 198 __ Branch(&only_change_map, eq, at, Operand(t0)); | 198 __ Branch(&only_change_map, eq, at, Operand(t0)); |
| 199 | 199 |
| 200 __ push(ra); | 200 __ push(ra); |
| 201 __ lw(t1, FieldMemOperand(t0, FixedArray::kLengthOffset)); | 201 __ lw(t1, FieldMemOperand(t0, FixedArray::kLengthOffset)); |
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| 309 // -- a0 : value | 309 // -- a0 : value |
| 310 // -- a1 : key | 310 // -- a1 : key |
| 311 // -- a2 : receiver | 311 // -- a2 : receiver |
| 312 // -- ra : return address | 312 // -- ra : return address |
| 313 // -- a3 : target map, scratch for subsequent call | 313 // -- a3 : target map, scratch for subsequent call |
| 314 // -- t0 : scratch (elements) | 314 // -- t0 : scratch (elements) |
| 315 // ----------------------------------- | 315 // ----------------------------------- |
| 316 Label entry, loop, convert_hole, gc_required, only_change_map; | 316 Label entry, loop, convert_hole, gc_required, only_change_map; |
| 317 | 317 |
| 318 if (mode == TRACK_ALLOCATION_SITE) { | 318 if (mode == TRACK_ALLOCATION_SITE) { |
| 319 masm->TestJSArrayForAllocationSiteInfo(a2, t0, eq, fail); | 319 masm->TestJSArrayForAllocationMemento(a2, t0, eq, fail); |
| 320 } | 320 } |
| 321 | 321 |
| 322 // Check for empty arrays, which only require a map transition and no changes | 322 // Check for empty arrays, which only require a map transition and no changes |
| 323 // to the backing store. | 323 // to the backing store. |
| 324 __ lw(t0, FieldMemOperand(a2, JSObject::kElementsOffset)); | 324 __ lw(t0, FieldMemOperand(a2, JSObject::kElementsOffset)); |
| 325 __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex); | 325 __ LoadRoot(at, Heap::kEmptyFixedArrayRootIndex); |
| 326 __ Branch(&only_change_map, eq, at, Operand(t0)); | 326 __ Branch(&only_change_map, eq, at, Operand(t0)); |
| 327 | 327 |
| 328 __ MultiPush(a0.bit() | a1.bit() | a2.bit() | a3.bit() | ra.bit()); | 328 __ MultiPush(a0.bit() | a1.bit() | a2.bit() | a3.bit() | ra.bit()); |
| 329 | 329 |
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| 659 patcher.masm()->dd(reinterpret_cast<uint32_t>(stub->instruction_start())); | 659 patcher.masm()->dd(reinterpret_cast<uint32_t>(stub->instruction_start())); |
| 660 } | 660 } |
| 661 } | 661 } |
| 662 | 662 |
| 663 | 663 |
| 664 #undef __ | 664 #undef __ |
| 665 | 665 |
| 666 } } // namespace v8::internal | 666 } } // namespace v8::internal |
| 667 | 667 |
| 668 #endif // V8_TARGET_ARCH_MIPS | 668 #endif // V8_TARGET_ARCH_MIPS |
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