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1 // Copyright 2006-2009 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2009 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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736 | 736 |
737 ldr(scratch, FieldMemOperand(scratch, token_offset)); | 737 ldr(scratch, FieldMemOperand(scratch, token_offset)); |
738 ldr(ip, FieldMemOperand(ip, token_offset)); | 738 ldr(ip, FieldMemOperand(ip, token_offset)); |
739 cmp(scratch, Operand(ip)); | 739 cmp(scratch, Operand(ip)); |
740 b(ne, miss); | 740 b(ne, miss); |
741 | 741 |
742 bind(&same_contexts); | 742 bind(&same_contexts); |
743 } | 743 } |
744 | 744 |
745 | 745 |
| 746 void MacroAssembler::CompareObjectType(Register function, |
| 747 Register map, |
| 748 Register type_reg, |
| 749 InstanceType type) { |
| 750 ldr(map, FieldMemOperand(function, HeapObject::kMapOffset)); |
| 751 ldrb(type_reg, FieldMemOperand(map, Map::kInstanceTypeOffset)); |
| 752 cmp(type_reg, Operand(type)); |
| 753 } |
| 754 |
| 755 |
| 756 void MacroAssembler::TryGetFunctionPrototype(Register function, |
| 757 Register result, |
| 758 Register scratch, |
| 759 Label* miss) { |
| 760 // Check that the receiver isn't a smi. |
| 761 BranchOnSmi(function, miss); |
| 762 |
| 763 // Check that the function really is a function. Load map into result reg. |
| 764 CompareObjectType(function, result, scratch, JS_FUNCTION_TYPE); |
| 765 b(ne, miss); |
| 766 |
| 767 // Make sure that the function has an instance prototype. |
| 768 Label non_instance; |
| 769 ldrb(scratch, FieldMemOperand(result, Map::kBitFieldOffset)); |
| 770 tst(scratch, Operand(1 << Map::kHasNonInstancePrototype)); |
| 771 b(ne, &non_instance); |
| 772 |
| 773 // Get the prototype or initial map from the function. |
| 774 ldr(result, |
| 775 FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); |
| 776 |
| 777 // If the prototype or initial map is the hole, don't return it and |
| 778 // simply miss the cache instead. This will allow us to allocate a |
| 779 // prototype object on-demand in the runtime system. |
| 780 cmp(result, Operand(Factory::the_hole_value())); |
| 781 b(eq, miss); |
| 782 |
| 783 // If the function does not have an initial map, we're done. |
| 784 Label done; |
| 785 CompareObjectType(result, scratch, scratch, MAP_TYPE); |
| 786 b(ne, &done); |
| 787 |
| 788 // Get the prototype from the initial map. |
| 789 ldr(result, FieldMemOperand(result, Map::kPrototypeOffset)); |
| 790 jmp(&done); |
| 791 |
| 792 // Non-instance prototype: Fetch prototype from constructor field |
| 793 // in initial map. |
| 794 bind(&non_instance); |
| 795 ldr(result, FieldMemOperand(result, Map::kConstructorOffset)); |
| 796 |
| 797 // All done. |
| 798 bind(&done); |
| 799 } |
| 800 |
| 801 |
746 void MacroAssembler::CallStub(CodeStub* stub) { | 802 void MacroAssembler::CallStub(CodeStub* stub) { |
747 ASSERT(allow_stub_calls()); // stub calls are not allowed in some stubs | 803 ASSERT(allow_stub_calls()); // stub calls are not allowed in some stubs |
748 Call(stub->GetCode(), RelocInfo::CODE_TARGET); | 804 Call(stub->GetCode(), RelocInfo::CODE_TARGET); |
749 } | 805 } |
750 | 806 |
751 | 807 |
752 void MacroAssembler::StubReturn(int argc) { | 808 void MacroAssembler::StubReturn(int argc) { |
753 ASSERT(argc >= 1 && generating_stub()); | 809 ASSERT(argc >= 1 && generating_stub()); |
754 if (argc > 1) | 810 if (argc > 1) |
755 add(sp, sp, Operand((argc - 1) * kPointerSize)); | 811 add(sp, sp, Operand((argc - 1) * kPointerSize)); |
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934 #endif | 990 #endif |
935 mov(r0, Operand(p0)); | 991 mov(r0, Operand(p0)); |
936 push(r0); | 992 push(r0); |
937 mov(r0, Operand(Smi::FromInt(p1 - p0))); | 993 mov(r0, Operand(Smi::FromInt(p1 - p0))); |
938 push(r0); | 994 push(r0); |
939 CallRuntime(Runtime::kAbort, 2); | 995 CallRuntime(Runtime::kAbort, 2); |
940 // will not return here | 996 // will not return here |
941 } | 997 } |
942 | 998 |
943 } } // namespace v8::internal | 999 } } // namespace v8::internal |
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