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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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3696 bind(&done); | 3696 bind(&done); |
3697 } | 3697 } |
3698 | 3698 |
3699 | 3699 |
3700 void MacroAssembler::LoadInstanceDescriptors(Register map, | 3700 void MacroAssembler::LoadInstanceDescriptors(Register map, |
3701 Register descriptors, | 3701 Register descriptors, |
3702 Register scratch) { | 3702 Register scratch) { |
3703 Register temp = descriptors; | 3703 Register temp = descriptors; |
3704 ldr(temp, FieldMemOperand(map, Map::kTransitionsOrBackPointerOffset)); | 3704 ldr(temp, FieldMemOperand(map, Map::kTransitionsOrBackPointerOffset)); |
3705 | 3705 |
3706 Label ok, fail, load_from_back_pointer; | 3706 Label ok, fail; |
3707 CheckMap(temp, | 3707 CheckMap(temp, |
3708 scratch, | 3708 scratch, |
3709 isolate()->factory()->fixed_array_map(), | 3709 isolate()->factory()->fixed_array_map(), |
3710 &fail, | 3710 &fail, |
3711 DONT_DO_SMI_CHECK); | 3711 DONT_DO_SMI_CHECK); |
3712 ldr(temp, FieldMemOperand(temp, TransitionArray::kDescriptorsPointerOffset)); | 3712 ldr(descriptors, FieldMemOperand(temp, TransitionArray::kDescriptorsOffset)); |
3713 ldr(descriptors, FieldMemOperand(temp, JSGlobalPropertyCell::kValueOffset)); | |
3714 jmp(&ok); | 3713 jmp(&ok); |
3715 | |
3716 bind(&fail); | 3714 bind(&fail); |
3717 CompareRoot(temp, Heap::kUndefinedValueRootIndex); | |
3718 b(ne, &load_from_back_pointer); | |
3719 mov(descriptors, Operand(FACTORY->empty_descriptor_array())); | 3715 mov(descriptors, Operand(FACTORY->empty_descriptor_array())); |
3720 jmp(&ok); | |
3721 | |
3722 bind(&load_from_back_pointer); | |
3723 ldr(temp, FieldMemOperand(temp, Map::kTransitionsOrBackPointerOffset)); | |
3724 ldr(temp, FieldMemOperand(temp, TransitionArray::kDescriptorsPointerOffset)); | |
3725 ldr(descriptors, FieldMemOperand(temp, JSGlobalPropertyCell::kValueOffset)); | |
3726 | |
3727 bind(&ok); | 3716 bind(&ok); |
3728 } | 3717 } |
3729 | 3718 |
3730 | 3719 |
3731 void MacroAssembler::NumberOfOwnDescriptors(Register dst, Register map) { | |
3732 ldr(dst, FieldMemOperand(map, Map::kBitFieldOffset)); | |
3733 DecodeField<Map::NumberOfOwnDescriptorsBits>(dst); | |
3734 } | |
3735 | |
3736 | |
3737 void MacroAssembler::EnumLength(Register dst, Register map) { | 3720 void MacroAssembler::EnumLength(Register dst, Register map) { |
3738 STATIC_ASSERT(Map::EnumLengthBits::kShift == 0); | 3721 STATIC_ASSERT(Map::EnumLengthBits::kShift == 0); |
3739 ldr(dst, FieldMemOperand(map, Map::kBitField3Offset)); | 3722 ldr(dst, FieldMemOperand(map, Map::kBitField3Offset)); |
3740 and_(dst, dst, Operand(Smi::FromInt(Map::EnumLengthBits::kMask))); | 3723 and_(dst, dst, Operand(Smi::FromInt(Map::EnumLengthBits::kMask))); |
3741 } | 3724 } |
3742 | 3725 |
3743 | 3726 |
3744 void MacroAssembler::CheckEnumCache(Register null_value, Label* call_runtime) { | 3727 void MacroAssembler::CheckEnumCache(Register null_value, Label* call_runtime) { |
3745 Register empty_fixed_array_value = r6; | 3728 Register empty_fixed_array_value = r6; |
3746 LoadRoot(empty_fixed_array_value, Heap::kEmptyFixedArrayRootIndex); | 3729 LoadRoot(empty_fixed_array_value, Heap::kEmptyFixedArrayRootIndex); |
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3838 void CodePatcher::EmitCondition(Condition cond) { | 3821 void CodePatcher::EmitCondition(Condition cond) { |
3839 Instr instr = Assembler::instr_at(masm_.pc_); | 3822 Instr instr = Assembler::instr_at(masm_.pc_); |
3840 instr = (instr & ~kCondMask) | cond; | 3823 instr = (instr & ~kCondMask) | cond; |
3841 masm_.emit(instr); | 3824 masm_.emit(instr); |
3842 } | 3825 } |
3843 | 3826 |
3844 | 3827 |
3845 } } // namespace v8::internal | 3828 } } // namespace v8::internal |
3846 | 3829 |
3847 #endif // V8_TARGET_ARCH_ARM | 3830 #endif // V8_TARGET_ARCH_ARM |
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