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| 1 // Copyright 2009 the V8 project authors. All rights reserved. | 1 // Copyright 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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| 484 // Load the initial map from the array function. | 484 // Load the initial map from the array function. |
| 485 __ movq(scratch1, FieldOperand(array_function, | 485 __ movq(scratch1, FieldOperand(array_function, |
| 486 JSFunction::kPrototypeOrInitialMapOffset)); | 486 JSFunction::kPrototypeOrInitialMapOffset)); |
| 487 | 487 |
| 488 // Allocate the JSArray object together with space for a fixed array with the | 488 // Allocate the JSArray object together with space for a fixed array with the |
| 489 // requested elements. | 489 // requested elements. |
| 490 int size = JSArray::kSize; | 490 int size = JSArray::kSize; |
| 491 if (initial_capacity > 0) { | 491 if (initial_capacity > 0) { |
| 492 size += FixedArray::SizeFor(initial_capacity); | 492 size += FixedArray::SizeFor(initial_capacity); |
| 493 } | 493 } |
| 494 __ AllocateObjectInNewSpace(size, | 494 __ AllocateInNewSpace(size, |
| 495 result, | 495 result, |
| 496 scratch2, | 496 scratch2, |
| 497 scratch3, | 497 scratch3, |
| 498 gc_required, | 498 gc_required, |
| 499 TAG_OBJECT); | 499 TAG_OBJECT); |
| 500 | 500 |
| 501 // Allocated the JSArray. Now initialize the fields except for the elements | 501 // Allocated the JSArray. Now initialize the fields except for the elements |
| 502 // array. | 502 // array. |
| 503 // result: JSObject | 503 // result: JSObject |
| 504 // scratch1: initial map | 504 // scratch1: initial map |
| 505 // scratch2: start of next object | 505 // scratch2: start of next object |
| 506 __ movq(FieldOperand(result, JSObject::kMapOffset), scratch1); | 506 __ movq(FieldOperand(result, JSObject::kMapOffset), scratch1); |
| 507 __ Move(FieldOperand(result, JSArray::kPropertiesOffset), | 507 __ Move(FieldOperand(result, JSArray::kPropertiesOffset), |
| 508 Factory::empty_fixed_array()); | 508 Factory::empty_fixed_array()); |
| 509 // Field JSArray::kElementsOffset is initialized later. | 509 // Field JSArray::kElementsOffset is initialized later. |
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| 585 FieldOperand(array_function, | 585 FieldOperand(array_function, |
| 586 JSFunction::kPrototypeOrInitialMapOffset)); | 586 JSFunction::kPrototypeOrInitialMapOffset)); |
| 587 | 587 |
| 588 // Check whether an empty sized array is requested. | 588 // Check whether an empty sized array is requested. |
| 589 __ testq(array_size, array_size); | 589 __ testq(array_size, array_size); |
| 590 __ j(not_zero, ¬_empty); | 590 __ j(not_zero, ¬_empty); |
| 591 | 591 |
| 592 // If an empty array is requested allocate a small elements array anyway. This | 592 // If an empty array is requested allocate a small elements array anyway. This |
| 593 // keeps the code below free of special casing for the empty array. | 593 // keeps the code below free of special casing for the empty array. |
| 594 int size = JSArray::kSize + FixedArray::SizeFor(kPreallocatedArrayElements); | 594 int size = JSArray::kSize + FixedArray::SizeFor(kPreallocatedArrayElements); |
| 595 __ AllocateObjectInNewSpace(size, | 595 __ AllocateInNewSpace(size, |
| 596 result, | 596 result, |
| 597 elements_array_end, | 597 elements_array_end, |
| 598 scratch, | 598 scratch, |
| 599 gc_required, | 599 gc_required, |
| 600 TAG_OBJECT); | 600 TAG_OBJECT); |
| 601 __ jmp(&allocated); | 601 __ jmp(&allocated); |
| 602 | 602 |
| 603 // Allocate the JSArray object together with space for a FixedArray with the | 603 // Allocate the JSArray object together with space for a FixedArray with the |
| 604 // requested elements. | 604 // requested elements. |
| 605 __ bind(¬_empty); | 605 __ bind(¬_empty); |
| 606 ASSERT(kSmiTagSize == 1 && kSmiTag == 0); | 606 ASSERT(kSmiTagSize == 1 && kSmiTag == 0); |
| 607 __ AllocateObjectInNewSpace(JSArray::kSize + FixedArray::kHeaderSize, | 607 __ AllocateInNewSpace(JSArray::kSize + FixedArray::kHeaderSize, |
| 608 times_half_pointer_size, // array_size is a smi. | 608 times_half_pointer_size, // array_size is a smi. |
| 609 array_size, | 609 array_size, |
| 610 result, | 610 result, |
| 611 elements_array_end, | 611 elements_array_end, |
| 612 scratch, | 612 scratch, |
| 613 gc_required, | 613 gc_required, |
| 614 TAG_OBJECT); | 614 TAG_OBJECT); |
| 615 | 615 |
| 616 // Allocated the JSArray. Now initialize the fields except for the elements | 616 // Allocated the JSArray. Now initialize the fields except for the elements |
| 617 // array. | 617 // array. |
| 618 // result: JSObject | 618 // result: JSObject |
| 619 // elements_array: initial map | 619 // elements_array: initial map |
| 620 // elements_array_end: start of next object | 620 // elements_array_end: start of next object |
| 621 // array_size: size of array (smi) | 621 // array_size: size of array (smi) |
| 622 __ bind(&allocated); | 622 __ bind(&allocated); |
| 623 __ movq(FieldOperand(result, JSObject::kMapOffset), elements_array); | 623 __ movq(FieldOperand(result, JSObject::kMapOffset), elements_array); |
| 624 __ Move(elements_array, Factory::empty_fixed_array()); | 624 __ Move(elements_array, Factory::empty_fixed_array()); |
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| 953 // instance type would be JS_FUNCTION_TYPE. | 953 // instance type would be JS_FUNCTION_TYPE. |
| 954 // rdi: constructor | 954 // rdi: constructor |
| 955 // rax: initial map | 955 // rax: initial map |
| 956 __ CmpInstanceType(rax, JS_FUNCTION_TYPE); | 956 __ CmpInstanceType(rax, JS_FUNCTION_TYPE); |
| 957 __ j(equal, &rt_call); | 957 __ j(equal, &rt_call); |
| 958 | 958 |
| 959 // Now allocate the JSObject on the heap. | 959 // Now allocate the JSObject on the heap. |
| 960 __ movzxbq(rdi, FieldOperand(rax, Map::kInstanceSizeOffset)); | 960 __ movzxbq(rdi, FieldOperand(rax, Map::kInstanceSizeOffset)); |
| 961 __ shl(rdi, Immediate(kPointerSizeLog2)); | 961 __ shl(rdi, Immediate(kPointerSizeLog2)); |
| 962 // rdi: size of new object | 962 // rdi: size of new object |
| 963 __ AllocateObjectInNewSpace(rdi, | 963 __ AllocateInNewSpace(rdi, |
| 964 rbx, | 964 rbx, |
| 965 rdi, | 965 rdi, |
| 966 no_reg, | 966 no_reg, |
| 967 &rt_call, | 967 &rt_call, |
| 968 NO_ALLOCATION_FLAGS); | 968 NO_ALLOCATION_FLAGS); |
| 969 // Allocated the JSObject, now initialize the fields. | 969 // Allocated the JSObject, now initialize the fields. |
| 970 // rax: initial map | 970 // rax: initial map |
| 971 // rbx: JSObject (not HeapObject tagged - the actual address). | 971 // rbx: JSObject (not HeapObject tagged - the actual address). |
| 972 // rdi: start of next object | 972 // rdi: start of next object |
| 973 __ movq(Operand(rbx, JSObject::kMapOffset), rax); | 973 __ movq(Operand(rbx, JSObject::kMapOffset), rax); |
| 974 __ LoadRoot(rcx, Heap::kEmptyFixedArrayRootIndex); | 974 __ LoadRoot(rcx, Heap::kEmptyFixedArrayRootIndex); |
| 975 __ movq(Operand(rbx, JSObject::kPropertiesOffset), rcx); | 975 __ movq(Operand(rbx, JSObject::kPropertiesOffset), rcx); |
| 976 __ movq(Operand(rbx, JSObject::kElementsOffset), rcx); | 976 __ movq(Operand(rbx, JSObject::kElementsOffset), rcx); |
| 977 // Set extra fields in the newly allocated object. | 977 // Set extra fields in the newly allocated object. |
| 978 // rax: initial map | 978 // rax: initial map |
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| 1013 __ subq(rdx, rcx); | 1013 __ subq(rdx, rcx); |
| 1014 // Done if no extra properties are to be allocated. | 1014 // Done if no extra properties are to be allocated. |
| 1015 __ j(zero, &allocated); | 1015 __ j(zero, &allocated); |
| 1016 __ Assert(positive, "Property allocation count failed."); | 1016 __ Assert(positive, "Property allocation count failed."); |
| 1017 | 1017 |
| 1018 // Scale the number of elements by pointer size and add the header for | 1018 // Scale the number of elements by pointer size and add the header for |
| 1019 // FixedArrays to the start of the next object calculation from above. | 1019 // FixedArrays to the start of the next object calculation from above. |
| 1020 // rbx: JSObject | 1020 // rbx: JSObject |
| 1021 // rdi: start of next object (will be start of FixedArray) | 1021 // rdi: start of next object (will be start of FixedArray) |
| 1022 // rdx: number of elements in properties array | 1022 // rdx: number of elements in properties array |
| 1023 __ AllocateObjectInNewSpace(FixedArray::kHeaderSize, | 1023 __ AllocateInNewSpace(FixedArray::kHeaderSize, |
| 1024 times_pointer_size, | 1024 times_pointer_size, |
| 1025 rdx, | 1025 rdx, |
| 1026 rdi, | 1026 rdi, |
| 1027 rax, | 1027 rax, |
| 1028 no_reg, | 1028 no_reg, |
| 1029 &undo_allocation, | 1029 &undo_allocation, |
| 1030 RESULT_CONTAINS_TOP); | 1030 RESULT_CONTAINS_TOP); |
| 1031 | 1031 |
| 1032 // Initialize the FixedArray. | 1032 // Initialize the FixedArray. |
| 1033 // rbx: JSObject | 1033 // rbx: JSObject |
| 1034 // rdi: FixedArray | 1034 // rdi: FixedArray |
| 1035 // rdx: number of elements | 1035 // rdx: number of elements |
| 1036 // rax: start of next object | 1036 // rax: start of next object |
| 1037 __ LoadRoot(rcx, Heap::kFixedArrayMapRootIndex); | 1037 __ LoadRoot(rcx, Heap::kFixedArrayMapRootIndex); |
| 1038 __ movq(Operand(rdi, JSObject::kMapOffset), rcx); // setup the map | 1038 __ movq(Operand(rdi, JSObject::kMapOffset), rcx); // setup the map |
| 1039 __ movl(Operand(rdi, FixedArray::kLengthOffset), rdx); // and length | 1039 __ movl(Operand(rdi, FixedArray::kLengthOffset), rdx); // and length |
| 1040 | 1040 |
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| 1271 void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) { | 1271 void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) { |
| 1272 Generate_JSEntryTrampolineHelper(masm, false); | 1272 Generate_JSEntryTrampolineHelper(masm, false); |
| 1273 } | 1273 } |
| 1274 | 1274 |
| 1275 | 1275 |
| 1276 void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) { | 1276 void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) { |
| 1277 Generate_JSEntryTrampolineHelper(masm, true); | 1277 Generate_JSEntryTrampolineHelper(masm, true); |
| 1278 } | 1278 } |
| 1279 | 1279 |
| 1280 } } // namespace v8::internal | 1280 } } // namespace v8::internal |
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