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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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4533 // function without changing the state. | 4533 // function without changing the state. |
4534 __ cmp(ecx, edi); | 4534 __ cmp(ecx, edi); |
4535 __ j(equal, &call, Label::kNear); | 4535 __ j(equal, &call, Label::kNear); |
4536 __ cmp(ecx, Immediate(MegamorphicSentinel(isolate))); | 4536 __ cmp(ecx, Immediate(MegamorphicSentinel(isolate))); |
4537 __ j(equal, &call, Label::kNear); | 4537 __ j(equal, &call, Label::kNear); |
4538 | 4538 |
4539 // A monomorphic miss (i.e, here the cache is not uninitialized) goes | 4539 // A monomorphic miss (i.e, here the cache is not uninitialized) goes |
4540 // megamorphic. | 4540 // megamorphic. |
4541 __ cmp(ecx, Immediate(UninitializedSentinel(isolate))); | 4541 __ cmp(ecx, Immediate(UninitializedSentinel(isolate))); |
4542 __ j(equal, &initialize, Label::kNear); | 4542 __ j(equal, &initialize, Label::kNear); |
4543 // MegamorphicSentinel is a root so no write-barrier is needed. | 4543 // MegamorphicSentinel is an immortal immovable object (undefined) so no |
| 4544 // write-barrier is needed. |
4544 __ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset), | 4545 __ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset), |
4545 Immediate(MegamorphicSentinel(isolate))); | 4546 Immediate(MegamorphicSentinel(isolate))); |
4546 __ jmp(&call, Label::kNear); | 4547 __ jmp(&call, Label::kNear); |
4547 | 4548 |
4548 // An uninitialized cache is patched with the function. | 4549 // An uninitialized cache is patched with the function. |
4549 __ bind(&initialize); | 4550 __ bind(&initialize); |
4550 __ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset), edi); | 4551 __ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset), edi); |
4551 __ mov(ecx, edi); | 4552 // No need for a write barrier here - cells are rescanned. |
4552 __ RecordWriteField(ebx, | |
4553 JSGlobalPropertyCell::kValueOffset, | |
4554 ecx, | |
4555 edx, | |
4556 kDontSaveFPRegs, | |
4557 OMIT_REMEMBERED_SET, // Cells are rescanned. | |
4558 OMIT_SMI_CHECK); | |
4559 | 4553 |
4560 __ bind(&call); | 4554 __ bind(&call); |
4561 } | 4555 } |
4562 | 4556 |
4563 // Fast-case: Just invoke the function. | 4557 // Fast-case: Just invoke the function. |
4564 ParameterCount actual(argc_); | 4558 ParameterCount actual(argc_); |
4565 | 4559 |
4566 if (ReceiverMightBeImplicit()) { | 4560 if (ReceiverMightBeImplicit()) { |
4567 Label call_as_function; | 4561 Label call_as_function; |
4568 __ cmp(eax, isolate->factory()->the_hole_value()); | 4562 __ cmp(eax, isolate->factory()->the_hole_value()); |
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4580 NullCallWrapper(), | 4574 NullCallWrapper(), |
4581 CALL_AS_FUNCTION); | 4575 CALL_AS_FUNCTION); |
4582 | 4576 |
4583 // Slow-case: Non-function called. | 4577 // Slow-case: Non-function called. |
4584 __ bind(&slow); | 4578 __ bind(&slow); |
4585 if (RecordCallTarget()) { | 4579 if (RecordCallTarget()) { |
4586 // If there is a call target cache, mark it megamorphic in the | 4580 // If there is a call target cache, mark it megamorphic in the |
4587 // non-function case. | 4581 // non-function case. |
4588 __ mov(ebx, Operand(esp, 0)); | 4582 __ mov(ebx, Operand(esp, 0)); |
4589 __ mov(ebx, Operand(ebx, 1)); | 4583 __ mov(ebx, Operand(ebx, 1)); |
| 4584 // MegamorphicSentinel is an immortal immovable object (undefined) so no |
| 4585 // write barrier is needed. |
4590 __ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset), | 4586 __ mov(FieldOperand(ebx, JSGlobalPropertyCell::kValueOffset), |
4591 Immediate(MegamorphicSentinel(isolate))); | 4587 Immediate(MegamorphicSentinel(isolate))); |
4592 } | 4588 } |
4593 // Check for function proxy. | 4589 // Check for function proxy. |
4594 __ CmpInstanceType(ecx, JS_FUNCTION_PROXY_TYPE); | 4590 __ CmpInstanceType(ecx, JS_FUNCTION_PROXY_TYPE); |
4595 __ j(not_equal, &non_function); | 4591 __ j(not_equal, &non_function); |
4596 __ pop(ecx); | 4592 __ pop(ecx); |
4597 __ push(edi); // put proxy as additional argument under return address | 4593 __ push(edi); // put proxy as additional argument under return address |
4598 __ push(ecx); | 4594 __ push(ecx); |
4599 __ Set(eax, Immediate(argc_ + 1)); | 4595 __ Set(eax, Immediate(argc_ + 1)); |
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7172 false); | 7168 false); |
7173 __ pop(edx); | 7169 __ pop(edx); |
7174 __ ret(0); | 7170 __ ret(0); |
7175 } | 7171 } |
7176 | 7172 |
7177 #undef __ | 7173 #undef __ |
7178 | 7174 |
7179 } } // namespace v8::internal | 7175 } } // namespace v8::internal |
7180 | 7176 |
7181 #endif // V8_TARGET_ARCH_IA32 | 7177 #endif // V8_TARGET_ARCH_IA32 |
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