ic-ia32.cc.svn-base

Google浏览器V8内核代码

  __ bind(&fast);
  // eax: value
  // ecx: FixedArray
  // ebx: index (as a smi)
  __ mov(Operand(ecx, ebx, times_2, Array::kHeaderSize - kHeapObjectTag), eax);
  // Update write barrier for the elements array address.
  __ mov(edx, Operand(eax));
  __ RecordWrite(ecx, 0, edx, ebx);
  __ ret(0);
}


// Defined in ic.cc.
Object* CallIC_Miss(Arguments args);

void CallIC::GenerateMegamorphic(MacroAssembler* masm, int argc) {
  // ----------- S t a t e -------------
  // -----------------------------------
  Label number, non_number, non_string, boolean, probe, miss;

  // Get the receiver of the function from the stack; 1 ~ return address.
  __ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
  // Get the name of the function from the stack; 2 ~ return address, receiver
  __ mov(ecx, Operand(esp, (argc + 2) * kPointerSize));

  // Probe the stub cache.
  Code::Flags flags =
      Code::ComputeFlags(Code::CALL_IC, MONOMORPHIC, NORMAL, argc);
  StubCache::GenerateProbe(masm, flags, edx, ecx, ebx);

  // If the stub cache probing failed, the receiver might be a value.
  // For value objects, we use the map of the prototype objects for
  // the corresponding JSValue for the cache and that is what we need
  // to probe.
  //
  // Check for number.
  __ test(edx, Immediate(kSmiTagMask));
  __ j(zero, &number, not_taken);
  __ mov(ebx, FieldOperand(edx, HeapObject::kMapOffset));
  __ movzx_b(ebx, FieldOperand(ebx, Map::kInstanceTypeOffset));
  __ cmp(ebx, HEAP_NUMBER_TYPE);
  __ j(not_equal, &non_number, taken);
  __ bind(&number);
  StubCompiler::GenerateLoadGlobalFunctionPrototype(
      masm, Context::NUMBER_FUNCTION_INDEX, edx);
  __ jmp(&probe);

  // Check for string.
  __ bind(&non_number);
  __ cmp(ebx, FIRST_NONSTRING_TYPE);
  __ j(above_equal, &non_string, taken);
  StubCompiler::GenerateLoadGlobalFunctionPrototype(
      masm, Context::STRING_FUNCTION_INDEX, edx);
  __ jmp(&probe);

  // Check for boolean.
  __ bind(&non_string);
  __ cmp(edx, Factory::true_value());
  __ j(equal, &boolean, not_taken);
  __ cmp(edx, Factory::false_value());
  __ j(not_equal, &miss, taken);
  __ bind(&boolean);
  StubCompiler::GenerateLoadGlobalFunctionPrototype(
      masm, Context::BOOLEAN_FUNCTION_INDEX, edx);

  // Probe the stub cache for the value object.
  __ bind(&probe);
  StubCache::GenerateProbe(masm, flags, edx, ecx, ebx);

  // Cache miss: Jump to runtime.
  __ bind(&miss);
  Generate(masm, argc, ExternalReference(IC_Utility(kCallIC_Miss)));
}


void CallIC::GenerateNormal(MacroAssembler* masm, int argc) {
  // ----------- S t a t e -------------
  // -----------------------------------

  Label miss, probe, global;

  // Get the receiver of the function from the stack; 1 ~ return address.
  __ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
  // Get the name of the function from the stack; 2 ~ return address, receiver.
  __ mov(ecx, Operand(esp, (argc + 2) * kPointerSize));

  // Check that the receiver isn't a smi.
  __ test(edx, Immediate(kSmiTagMask));
  __ j(zero, &miss, not_taken);

  // Check that the receiver is a valid JS object.
  __ mov(eax, FieldOperand(edx, HeapObject::kMapOffset));
  __ movzx_b(eax, FieldOperand(eax, Map::kInstanceTypeOffset));
  __ cmp(eax, FIRST_JS_OBJECT_TYPE);
  __ j(less, &miss, not_taken);

  // If this assert fails, we have to check upper bound too.
  ASSERT(LAST_TYPE == JS_FUNCTION_TYPE);

  // Check for access to global object.
  __ cmp(eax, JS_GLOBAL_OBJECT_TYPE);
  __ j(equal, &global, not_taken);

  // Search the dictionary placing the result in edx.
  __ bind(&probe);
  GenerateDictionaryLoad(masm, &miss, eax, edx, ebx, ecx);

  // Move the result to register edi and check that it isn't a smi.
  __ mov(edi, Operand(edx));
  __ test(edx, Immediate(kSmiTagMask));
  __ j(zero, &miss, not_taken);

  // Check that the value is a JavaScript function.
  __ mov(edx, FieldOperand(edx, HeapObject::kMapOffset));
  __ movzx_b(edx, FieldOperand(edx, Map::kInstanceTypeOffset));
  __ cmp(edx, JS_FUNCTION_TYPE);
  __ j(not_equal, &miss, not_taken);

  // Invoke the function.
  ParameterCount actual(argc);
  __ InvokeFunction(edi, actual, JUMP_FUNCTION);

  // Global object access: Check access rights.
  __ bind(&global);
  __ CheckAccessGlobal(edx, eax, &miss);
  __ jmp(&probe);

  // Cache miss: Jump to runtime.
  __ bind(&miss);
  Generate(masm, argc, ExternalReference(IC_Utility(kCallIC_Miss)));
}


void CallIC::Generate(MacroAssembler* masm,
                      int argc,
                      const ExternalReference& f) {
  // ----------- S t a t e -------------
  // -----------------------------------

  // Get the receiver of the function from the stack; 1 ~ return address.
  __ mov(edx, Operand(esp, (argc + 1) * kPointerSize));
  // Get the name of the function to call from the stack.
  // 2 ~ receiver, return address.
  __ mov(ebx, Operand(esp, (argc + 2) * kPointerSize));

  // Enter an internal frame.
  __ EnterInternalFrame();

  // Push the receiver and the name of the function.
  __ push(Operand(edx));
  __ push(Operand(ebx));

  // Call the entry.
  CEntryStub stub;
  __ mov(Operand(eax), Immediate(2));
  __ mov(Operand(ebx), Immediate(f));
  __ CallStub(&stub);

  // Move result to edi and exit the internal frame.
  __ mov(Operand(edi), eax);
  __ LeaveInternalFrame();

  // Invoke the function.
  ParameterCount actual(argc);
  __ InvokeFunction(edi, actual, JUMP_FUNCTION);
}


// Defined in ic.cc.
Object* LoadIC_Miss(Arguments args);

void LoadIC::GenerateMegamorphic(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- ecx    : name
  //  -- esp[0] : return address
  //  -- esp[4] : receiver
  // -----------------------------------

  __ mov(eax, Operand(esp, kPointerSize));

  // Probe the stub cache.
  Code::Flags flags = Code::ComputeFlags(Code::LOAD_IC, MONOMORPHIC);
  StubCache::GenerateProbe(masm, flags, eax, ecx, ebx);

  // Cache miss: Jump to runtime.
  Generate(masm, ExternalReference(IC_Utility(kLoadIC_Miss)));
}


void LoadIC::GenerateNormal(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- ecx    : name
  //  -- esp[0] : return address
  //  -- esp[4] : receiver
  // -----------------------------------

  Label miss, probe, global;

  __ mov(eax, Operand(esp, kPointerSize));

  // Check that the receiver isn't a smi.
  __ test(eax, Immediate(kSmiTagMask));
  __ j(zero, &miss, not_taken);

  // Check that the receiver is a valid JS object.
  __ mov(edx, FieldOperand(eax, HeapObject::kMapOffset));
  __ movzx_b(edx, FieldOperand(edx, Map::kInstanceTypeOffset));
  __ cmp(edx, FIRST_JS_OBJECT_TYPE);
  __ j(less, &miss, not_taken);

  // If this assert fails, we have to check upper bound too.
  ASSERT(LAST_TYPE == JS_FUNCTION_TYPE);

  // Check for access to global object (unlikely).
  __ cmp(edx, JS_GLOBAL_OBJECT_TYPE);
  __ j(equal, &global, not_taken);

  // Search the dictionary placing the result in eax.
  __ bind(&probe);
  GenerateDictionaryLoad(masm, &miss, edx, eax, ebx, ecx);
  __ ret(0);

  // Global object access: Check access rights.
  __ bind(&global);
  __ CheckAccessGlobal(eax, edx, &miss);
  __ jmp(&probe);

  // Cache miss: Restore receiver from stack and jump to runtime.
  __ bind(&miss);
  __ mov(eax, Operand(esp, 1 * kPointerSize));
  Generate(masm, ExternalReference(IC_Utility(kLoadIC_Miss)));
}


void LoadIC::GenerateMiss(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- ecx    : name
  //  -- esp[0] : return address
  //  -- esp[4] : receiver
  // -----------------------------------

  Generate(masm, ExternalReference(IC_Utility(kLoadIC_Miss)));
}


void LoadIC::Generate(MacroAssembler* masm, const ExternalReference& f) {
  // ----------- S t a t e -------------
  //  -- ecx    : name
  //  -- esp[0] : return address
  //  -- esp[4] : receiver
  // -----------------------------------

  __ mov(eax, Operand(esp, kPointerSize));

  // Move the return address below the arguments.
  __ pop(ebx);
  __ push(eax);
  __ push(ecx);
  __ push(ebx);

  // Perform tail call to the entry.
  __ TailCallRuntime(f, 2);
}


// Defined in ic.cc.
Object* KeyedLoadIC_Miss(Arguments args);


void KeyedLoadIC::GenerateMiss(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- esp[0] : return address
  //  -- esp[4] : name
  //  -- esp[8] : receiver
  // -----------------------------------

  Generate(masm, ExternalReference(IC_Utility(kKeyedLoadIC_Miss)));
}


void KeyedLoadIC::Generate(MacroAssembler* masm, const ExternalReference& f) {
  // ----------- S t a t e -------------
  //  -- esp[0] : return address
  //  -- esp[4] : name
  //  -- esp[8] : receiver
  // -----------------------------------

  __ mov(eax, Operand(esp, kPointerSize));
  __ mov(ecx, Operand(esp, 2 * kPointerSize));

  // Move the return address below the arguments.
  __ pop(ebx);
  __ push(ecx);
  __ push(eax);
  __ push(ebx);

  // Perform tail call to the entry.
  __ TailCallRuntime(f, 2);
}


// Defined in ic.cc.
Object* StoreIC_Miss(Arguments args);

void StoreIC::GenerateMegamorphic(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- eax    : value
  //  -- ecx    : name
  //  -- esp[0] : return address
  //  -- esp[4] : receiver
  // -----------------------------------

  // Get the receiver from the stack and probe the stub cache.
  __ mov(edx, Operand(esp, 4));
  Code::Flags flags = Code::ComputeFlags(Code::STORE_IC, MONOMORPHIC);
  StubCache::GenerateProbe(masm, flags, edx, ecx, ebx);

  // Cache miss: Jump to runtime.
  Generate(masm, ExternalReference(IC_Utility(kStoreIC_Miss)));
}


void StoreIC::Generate(MacroAssembler* masm, const ExternalReference& f) {
  // ----------- S t a t e -------------
  //  -- eax    : value
  //  -- ecx    : name
  //  -- esp[0] : return address
  //  -- esp[4] : receiver
  // -----------------------------------

  // Move the return address below the arguments.
  __ pop(ebx);
  __ push(Operand(esp, 0));
  __ push(ecx);
  __ push(eax);
  __ push(ebx);

  // Perform tail call to the entry.
  __ TailCallRuntime(f, 3);
}


// Defined in ic.cc.
Object* KeyedStoreIC_Miss(Arguments args);

void KeyedStoreIC::Generate(MacroAssembler* masm, const ExternalReference& f) {
  // ----------- S t a t e -------------
  //  -- eax    : value
  //  -- esp[0] : return address
  //  -- esp[4] : key
  //  -- esp[8] : receiver
  // -----------------------------------

  // Move the return address below the arguments.
  __ pop(ecx);
  __ push(Operand(esp, 1 * kPointerSize));
  __ push(Operand(esp, 1 * kPointerSize));
  __ push(eax);
  __ push(ecx);

  // Do tail-call to runtime routine.
  __ TailCallRuntime(f, 3);
}


#undef __


} }  // namespace v8::internal