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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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2913 addsd(dst, scratch); | 2913 addsd(dst, scratch); |
2914 bind(&done); | 2914 bind(&done); |
2915 } | 2915 } |
2916 | 2916 |
2917 | 2917 |
2918 void MacroAssembler::LoadInstanceDescriptors(Register map, | 2918 void MacroAssembler::LoadInstanceDescriptors(Register map, |
2919 Register descriptors) { | 2919 Register descriptors) { |
2920 Register temp = descriptors; | 2920 Register temp = descriptors; |
2921 movq(temp, FieldOperand(map, Map::kTransitionsOrBackPointerOffset)); | 2921 movq(temp, FieldOperand(map, Map::kTransitionsOrBackPointerOffset)); |
2922 | 2922 |
2923 Label ok, fail, load_from_back_pointer; | 2923 Label ok, fail; |
2924 CheckMap(temp, | 2924 CheckMap(temp, |
2925 isolate()->factory()->fixed_array_map(), | 2925 isolate()->factory()->fixed_array_map(), |
2926 &fail, | 2926 &fail, |
2927 DONT_DO_SMI_CHECK); | 2927 DONT_DO_SMI_CHECK); |
2928 movq(temp, FieldOperand(temp, TransitionArray::kDescriptorsPointerOffset)); | 2928 movq(descriptors, FieldOperand(temp, TransitionArray::kDescriptorsOffset)); |
2929 movq(descriptors, FieldOperand(temp, JSGlobalPropertyCell::kValueOffset)); | |
2930 jmp(&ok); | 2929 jmp(&ok); |
2931 | |
2932 bind(&fail); | 2930 bind(&fail); |
2933 CompareRoot(temp, Heap::kUndefinedValueRootIndex); | |
2934 j(not_equal, &load_from_back_pointer, Label::kNear); | |
2935 Move(descriptors, isolate()->factory()->empty_descriptor_array()); | 2931 Move(descriptors, isolate()->factory()->empty_descriptor_array()); |
2936 jmp(&ok); | |
2937 | |
2938 bind(&load_from_back_pointer); | |
2939 movq(temp, FieldOperand(temp, Map::kTransitionsOrBackPointerOffset)); | |
2940 movq(temp, FieldOperand(temp, TransitionArray::kDescriptorsPointerOffset)); | |
2941 movq(descriptors, FieldOperand(temp, JSGlobalPropertyCell::kValueOffset)); | |
2942 | |
2943 bind(&ok); | 2932 bind(&ok); |
2944 } | 2933 } |
2945 | 2934 |
2946 | 2935 |
2947 void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) { | |
2948 movq(dst, FieldOperand(map, Map::kBitField3Offset)); | |
2949 DecodeField<Map::NumberOfOwnDescriptorsBits>(dst); | |
2950 } | |
2951 | |
2952 | |
2953 void MacroAssembler::EnumLength(Register dst, Register map) { | 2936 void MacroAssembler::EnumLength(Register dst, Register map) { |
2954 STATIC_ASSERT(Map::EnumLengthBits::kShift == 0); | 2937 STATIC_ASSERT(Map::EnumLengthBits::kShift == 0); |
2955 movq(dst, FieldOperand(map, Map::kBitField3Offset)); | 2938 movq(dst, FieldOperand(map, Map::kBitField3Offset)); |
2956 Move(kScratchRegister, Smi::FromInt(Map::EnumLengthBits::kMask)); | 2939 Move(kScratchRegister, Smi::FromInt(Map::EnumLengthBits::kMask)); |
2957 and_(dst, kScratchRegister); | 2940 and_(dst, kScratchRegister); |
2958 } | 2941 } |
2959 | 2942 |
2960 | 2943 |
2961 void MacroAssembler::DispatchMap(Register obj, | 2944 void MacroAssembler::DispatchMap(Register obj, |
2962 Handle<Map> map, | 2945 Handle<Map> map, |
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4573 | 4556 |
4574 movq(rcx, FieldOperand(rbx, Map::kPrototypeOffset)); | 4557 movq(rcx, FieldOperand(rbx, Map::kPrototypeOffset)); |
4575 cmpq(rcx, null_value); | 4558 cmpq(rcx, null_value); |
4576 j(not_equal, &next); | 4559 j(not_equal, &next); |
4577 } | 4560 } |
4578 | 4561 |
4579 | 4562 |
4580 } } // namespace v8::internal | 4563 } } // namespace v8::internal |
4581 | 4564 |
4582 #endif // V8_TARGET_ARCH_X64 | 4565 #endif // V8_TARGET_ARCH_X64 |
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