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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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6495 | 6495 |
6496 ASSERT(GetCondition() == equal); | 6496 ASSERT(GetCondition() == equal); |
6497 __ sub(eax, edx); | 6497 __ sub(eax, edx); |
6498 __ ret(0); | 6498 __ ret(0); |
6499 | 6499 |
6500 __ bind(&miss); | 6500 __ bind(&miss); |
6501 GenerateMiss(masm); | 6501 GenerateMiss(masm); |
6502 } | 6502 } |
6503 | 6503 |
6504 | 6504 |
6505 void ICCompareStub::GenerateKnownObjects(MacroAssembler* masm, Map* map) { | |
6506 Label miss; | |
6507 __ mov(ecx, edx); | |
6508 __ and_(ecx, eax); | |
6509 __ JumpIfSmi(ecx, &miss, Label::kNear); | |
6510 | |
6511 __ mov(ecx, FieldOperand(eax, HeapObject::kMapOffset)); | |
6512 __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset)); | |
6513 __ cmp(ecx, Handle<Map>(map)); | |
6514 __ j(not_equal, &miss, Label::kNear); | |
6515 __ cmp(ebx, Handle<Map>(map)); | |
6516 __ j(not_equal, &miss, Label::kNear); | |
6517 | |
6518 __ sub(eax, edx); | |
6519 __ ret(0); | |
6520 | |
6521 __ bind(&miss); | |
Kevin Millikin (Chromium)
2011/11/10 19:08:42
All the code from here and below looks like it cou
Rico
2011/11/11 08:49:11
Done.
| |
6522 | |
6523 // Save the registers. | |
6524 __ pop(ecx); | |
Kevin Millikin (Chromium)
2011/11/10 19:08:42
And come to think of it, I don't know why we prese
Kevin Millikin (Chromium)
2011/11/10 19:11:18
Actually, that code has a bug. You need lea befor
| |
6525 __ push(edx); | |
6526 __ push(eax); | |
6527 __ push(ecx); | |
6528 | |
6529 // Call the runtime system in a fresh internal frame. | |
6530 ExternalReference runtime = ExternalReference(IC_Utility(IC::kCompareIC_Miss), | |
6531 masm->isolate()); | |
6532 { | |
6533 FrameScope scope(masm, StackFrame::INTERNAL); | |
6534 __ push(edx); | |
6535 __ push(eax); | |
6536 __ push(Immediate(Smi::FromInt(Token::EQ))); | |
6537 __ CallExternalReference(runtime, 3); | |
6538 } | |
6539 | |
6540 // Compute the entry point of the rewritten stub. | |
6541 __ lea(edi, FieldOperand(eax, Code::kHeaderSize)); | |
6542 | |
6543 // Restore registers. | |
6544 __ pop(ecx); | |
6545 __ pop(eax); | |
6546 __ pop(edx); | |
6547 __ push(ecx); | |
6548 | |
6549 // Do a tail call to the rewritten stub. | |
6550 __ jmp(edi); | |
6551 } | |
6552 | |
6553 | |
6505 void ICCompareStub::GenerateMiss(MacroAssembler* masm) { | 6554 void ICCompareStub::GenerateMiss(MacroAssembler* masm) { |
6506 // Save the registers. | 6555 // Save the registers. |
6507 __ pop(ecx); | 6556 __ pop(ecx); |
6508 __ push(edx); | 6557 __ push(edx); |
6509 __ push(eax); | 6558 __ push(eax); |
6510 __ push(ecx); | 6559 __ push(ecx); |
6511 | 6560 |
6512 { | 6561 { |
6513 // Call the runtime system in a fresh internal frame. | 6562 // Call the runtime system in a fresh internal frame. |
6514 ExternalReference miss = ExternalReference(IC_Utility(IC::kCompareIC_Miss), | 6563 ExternalReference miss = ExternalReference(IC_Utility(IC::kCompareIC_Miss), |
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7111 __ bind(&element_done); | 7160 __ bind(&element_done); |
7112 __ ret(0); | 7161 __ ret(0); |
7113 } | 7162 } |
7114 } | 7163 } |
7115 | 7164 |
7116 #undef __ | 7165 #undef __ |
7117 | 7166 |
7118 } } // namespace v8::internal | 7167 } } // namespace v8::internal |
7119 | 7168 |
7120 #endif // V8_TARGET_ARCH_IA32 | 7169 #endif // V8_TARGET_ARCH_IA32 |
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