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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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4646 // function without changing the state. | 4646 // function without changing the state. |
4647 __ cmp(ecx, edi); | 4647 __ cmp(ecx, edi); |
4648 __ j(equal, &call, Label::kNear); | 4648 __ j(equal, &call, Label::kNear); |
4649 __ cmp(ecx, Immediate(MegamorphicSentinel(isolate))); | 4649 __ cmp(ecx, Immediate(MegamorphicSentinel(isolate))); |
4650 __ j(equal, &call, Label::kNear); | 4650 __ j(equal, &call, Label::kNear); |
4651 | 4651 |
4652 // A monomorphic miss (i.e, here the cache is not uninitialized) goes | 4652 // A monomorphic miss (i.e, here the cache is not uninitialized) goes |
4653 // megamorphic. | 4653 // megamorphic. |
4654 __ cmp(ecx, Immediate(UninitializedSentinel(isolate))); | 4654 __ cmp(ecx, Immediate(UninitializedSentinel(isolate))); |
4655 __ j(equal, &initialize, Label::kNear); | 4655 __ j(equal, &initialize, Label::kNear); |
4656 // MegamorphicSentinel is a root so no write-barrier is needed. | 4656 // MegamorphicSentinel is an immortal immovable object (undefined) so no |
| 4657 // write-barrier is needed. |
4657 __ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset), | 4658 __ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset), |
4658 Immediate(MegamorphicSentinel(isolate))); | 4659 Immediate(MegamorphicSentinel(isolate))); |
4659 __ jmp(&call, Label::kNear); | 4660 __ jmp(&call, Label::kNear); |
4660 | 4661 |
4661 // An uninitialized cache is patched with the function. | 4662 // An uninitialized cache is patched with the function. |
4662 __ bind(&initialize); | 4663 __ bind(&initialize); |
4663 __ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset), edi); | 4664 __ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset), edi); |
4664 __ mov(ecx, edi); | 4665 // No need for a write barrier here - cells are rescanned. |
4665 __ RecordWriteField(ebx, | |
4666 JSGlobalPropertyCell::kValueOffset, | |
4667 ecx, | |
4668 edx, | |
4669 kDontSaveFPRegs, | |
4670 OMIT_REMEMBERED_SET, // Cells are rescanned. | |
4671 OMIT_SMI_CHECK); | |
4672 | 4666 |
4673 __ bind(&call); | 4667 __ bind(&call); |
4674 } | 4668 } |
4675 | 4669 |
4676 // Fast-case: Just invoke the function. | 4670 // Fast-case: Just invoke the function. |
4677 ParameterCount actual(argc_); | 4671 ParameterCount actual(argc_); |
4678 | 4672 |
4679 if (ReceiverMightBeImplicit()) { | 4673 if (ReceiverMightBeImplicit()) { |
4680 Label call_as_function; | 4674 Label call_as_function; |
4681 __ cmp(eax, isolate->factory()->the_hole_value()); | 4675 __ cmp(eax, isolate->factory()->the_hole_value()); |
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4693 NullCallWrapper(), | 4687 NullCallWrapper(), |
4694 CALL_AS_FUNCTION); | 4688 CALL_AS_FUNCTION); |
4695 | 4689 |
4696 // Slow-case: Non-function called. | 4690 // Slow-case: Non-function called. |
4697 __ bind(&slow); | 4691 __ bind(&slow); |
4698 if (RecordCallTarget()) { | 4692 if (RecordCallTarget()) { |
4699 // If there is a call target cache, mark it megamorphic in the | 4693 // If there is a call target cache, mark it megamorphic in the |
4700 // non-function case. | 4694 // non-function case. |
4701 __ mov(ebx, Operand(esp, 0)); | 4695 __ mov(ebx, Operand(esp, 0)); |
4702 __ mov(ebx, Operand(ebx, 1)); | 4696 __ mov(ebx, Operand(ebx, 1)); |
| 4697 // MegamorphicSentinel is an immortal immovable object (undefined) so no |
| 4698 // write barrier is needed. |
4703 __ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset), | 4699 __ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset), |
4704 Immediate(MegamorphicSentinel(isolate))); | 4700 Immediate(MegamorphicSentinel(isolate))); |
4705 } | 4701 } |
4706 // Check for function proxy. | 4702 // Check for function proxy. |
4707 __ CmpInstanceType(ecx, JS_FUNCTION_PROXY_TYPE); | 4703 __ CmpInstanceType(ecx, JS_FUNCTION_PROXY_TYPE); |
4708 __ j(not_equal, &non_function); | 4704 __ j(not_equal, &non_function); |
4709 __ pop(ecx); | 4705 __ pop(ecx); |
4710 __ push(edi); // put proxy as additional argument under return address | 4706 __ push(edi); // put proxy as additional argument under return address |
4711 __ push(ecx); | 4707 __ push(ecx); |
4712 __ Set(eax, Immediate(argc_ + 1)); | 4708 __ Set(eax, Immediate(argc_ + 1)); |
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7284 false); | 7280 false); |
7285 __ pop(edx); | 7281 __ pop(edx); |
7286 __ ret(0); | 7282 __ ret(0); |
7287 } | 7283 } |
7288 | 7284 |
7289 #undef __ | 7285 #undef __ |
7290 | 7286 |
7291 } } // namespace v8::internal | 7287 } } // namespace v8::internal |
7292 | 7288 |
7293 #endif // V8_TARGET_ARCH_IA32 | 7289 #endif // V8_TARGET_ARCH_IA32 |
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