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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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246 | 246 |
247 #undef __ | 247 #undef __ |
248 | 248 |
249 // ------------------------------------------------------------------------- | 249 // ------------------------------------------------------------------------- |
250 // Code generators | 250 // Code generators |
251 | 251 |
252 #define __ ACCESS_MASM(masm) | 252 #define __ ACCESS_MASM(masm) |
253 | 253 |
254 void ElementsTransitionGenerator::GenerateMapChangeElementsTransition( | 254 void ElementsTransitionGenerator::GenerateMapChangeElementsTransition( |
255 MacroAssembler* masm, AllocationSiteMode mode, | 255 MacroAssembler* masm, AllocationSiteMode mode, |
256 Label* allocation_site_info_found) { | 256 Label* allocation_memento_found) { |
257 // ----------- S t a t e ------------- | 257 // ----------- S t a t e ------------- |
258 // -- rax : value | 258 // -- rax : value |
259 // -- rbx : target map | 259 // -- rbx : target map |
260 // -- rcx : key | 260 // -- rcx : key |
261 // -- rdx : receiver | 261 // -- rdx : receiver |
262 // -- rsp[0] : return address | 262 // -- rsp[0] : return address |
263 // ----------------------------------- | 263 // ----------------------------------- |
264 if (mode == TRACK_ALLOCATION_SITE) { | 264 if (mode == TRACK_ALLOCATION_SITE) { |
265 ASSERT(allocation_site_info_found != NULL); | 265 ASSERT(allocation_memento_found != NULL); |
266 __ TestJSArrayForAllocationSiteInfo(rdx, rdi); | 266 __ TestJSArrayForAllocationMemento(rdx, rdi); |
267 __ j(equal, allocation_site_info_found); | 267 __ j(equal, allocation_memento_found); |
268 } | 268 } |
269 | 269 |
270 // Set transitioned map. | 270 // Set transitioned map. |
271 __ movq(FieldOperand(rdx, HeapObject::kMapOffset), rbx); | 271 __ movq(FieldOperand(rdx, HeapObject::kMapOffset), rbx); |
272 __ RecordWriteField(rdx, | 272 __ RecordWriteField(rdx, |
273 HeapObject::kMapOffset, | 273 HeapObject::kMapOffset, |
274 rbx, | 274 rbx, |
275 rdi, | 275 rdi, |
276 kDontSaveFPRegs, | 276 kDontSaveFPRegs, |
277 EMIT_REMEMBERED_SET, | 277 EMIT_REMEMBERED_SET, |
278 OMIT_SMI_CHECK); | 278 OMIT_SMI_CHECK); |
279 } | 279 } |
280 | 280 |
281 | 281 |
282 void ElementsTransitionGenerator::GenerateSmiToDouble( | 282 void ElementsTransitionGenerator::GenerateSmiToDouble( |
283 MacroAssembler* masm, AllocationSiteMode mode, Label* fail) { | 283 MacroAssembler* masm, AllocationSiteMode mode, Label* fail) { |
284 // ----------- S t a t e ------------- | 284 // ----------- S t a t e ------------- |
285 // -- rax : value | 285 // -- rax : value |
286 // -- rbx : target map | 286 // -- rbx : target map |
287 // -- rcx : key | 287 // -- rcx : key |
288 // -- rdx : receiver | 288 // -- rdx : receiver |
289 // -- rsp[0] : return address | 289 // -- rsp[0] : return address |
290 // ----------------------------------- | 290 // ----------------------------------- |
291 // The fail label is not actually used since we do not allocate. | 291 // The fail label is not actually used since we do not allocate. |
292 Label allocated, new_backing_store, only_change_map, done; | 292 Label allocated, new_backing_store, only_change_map, done; |
293 | 293 |
294 if (mode == TRACK_ALLOCATION_SITE) { | 294 if (mode == TRACK_ALLOCATION_SITE) { |
295 __ TestJSArrayForAllocationSiteInfo(rdx, rdi); | 295 __ TestJSArrayForAllocationMemento(rdx, rdi); |
296 __ j(equal, fail); | 296 __ j(equal, fail); |
297 } | 297 } |
298 | 298 |
299 // Check for empty arrays, which only require a map transition and no changes | 299 // Check for empty arrays, which only require a map transition and no changes |
300 // to the backing store. | 300 // to the backing store. |
301 __ movq(r8, FieldOperand(rdx, JSObject::kElementsOffset)); | 301 __ movq(r8, FieldOperand(rdx, JSObject::kElementsOffset)); |
302 __ CompareRoot(r8, Heap::kEmptyFixedArrayRootIndex); | 302 __ CompareRoot(r8, Heap::kEmptyFixedArrayRootIndex); |
303 __ j(equal, &only_change_map); | 303 __ j(equal, &only_change_map); |
304 | 304 |
305 // Check backing store for COW-ness. For COW arrays we have to | 305 // Check backing store for COW-ness. For COW arrays we have to |
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411 // ----------- S t a t e ------------- | 411 // ----------- S t a t e ------------- |
412 // -- rax : value | 412 // -- rax : value |
413 // -- rbx : target map | 413 // -- rbx : target map |
414 // -- rcx : key | 414 // -- rcx : key |
415 // -- rdx : receiver | 415 // -- rdx : receiver |
416 // -- rsp[0] : return address | 416 // -- rsp[0] : return address |
417 // ----------------------------------- | 417 // ----------------------------------- |
418 Label loop, entry, convert_hole, gc_required, only_change_map; | 418 Label loop, entry, convert_hole, gc_required, only_change_map; |
419 | 419 |
420 if (mode == TRACK_ALLOCATION_SITE) { | 420 if (mode == TRACK_ALLOCATION_SITE) { |
421 __ TestJSArrayForAllocationSiteInfo(rdx, rdi); | 421 __ TestJSArrayForAllocationMemento(rdx, rdi); |
422 __ j(equal, fail); | 422 __ j(equal, fail); |
423 } | 423 } |
424 | 424 |
425 // Check for empty arrays, which only require a map transition and no changes | 425 // Check for empty arrays, which only require a map transition and no changes |
426 // to the backing store. | 426 // to the backing store. |
427 __ movq(r8, FieldOperand(rdx, JSObject::kElementsOffset)); | 427 __ movq(r8, FieldOperand(rdx, JSObject::kElementsOffset)); |
428 __ CompareRoot(r8, Heap::kEmptyFixedArrayRootIndex); | 428 __ CompareRoot(r8, Heap::kEmptyFixedArrayRootIndex); |
429 __ j(equal, &only_change_map); | 429 __ j(equal, &only_change_map); |
430 | 430 |
431 __ push(rax); | 431 __ push(rax); |
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740 i++) { | 740 i++) { |
741 patcher.masm()->nop(); | 741 patcher.masm()->nop(); |
742 } | 742 } |
743 } | 743 } |
744 } | 744 } |
745 | 745 |
746 | 746 |
747 } } // namespace v8::internal | 747 } } // namespace v8::internal |
748 | 748 |
749 #endif // V8_TARGET_ARCH_X64 | 749 #endif // V8_TARGET_ARCH_X64 |
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