ic-arm.cc.svn-base

Google浏览器V8内核代码

  Code::Flags flags =
      Code::ComputeFlags(Code::CALL_IC, MONOMORPHIC, NORMAL, argc);
  StubCache::GenerateProbe(masm, flags, r1, r2, r3);

  // 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.
  __ tst(r1, Operand(kSmiTagMask));
  __ b(eq, &number);
  __ ldr(r3, FieldMemOperand(r1, HeapObject::kMapOffset));
  __ ldrb(r3, FieldMemOperand(r3, Map::kInstanceTypeOffset));
  __ cmp(r3, Operand(HEAP_NUMBER_TYPE));
  __ b(ne, &non_number);
  __ bind(&number);
  StubCompiler::GenerateLoadGlobalFunctionPrototype(
      masm, Context::NUMBER_FUNCTION_INDEX, r1);
  __ b(&probe);

  // Check for string.
  __ bind(&non_number);
  __ cmp(r3, Operand(FIRST_NONSTRING_TYPE));
  __ b(hs, &non_string);
  StubCompiler::GenerateLoadGlobalFunctionPrototype(
      masm, Context::STRING_FUNCTION_INDEX, r1);
  __ b(&probe);

  // Check for boolean.
  __ bind(&non_string);
  __ cmp(r1, Operand(Factory::true_value()));
  __ b(eq, &boolean);
  __ cmp(r1, Operand(Factory::false_value()));
  __ b(ne, &miss);
  __ bind(&boolean);
  StubCompiler::GenerateLoadGlobalFunctionPrototype(
      masm, Context::BOOLEAN_FUNCTION_INDEX, r1);

  // Probe the stub cache for the value object.
  __ bind(&probe);
  StubCache::GenerateProbe(masm, flags, r1, r2, r3);

  // 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 -------------
  //  -- lr: return address
  // -----------------------------------

  Label miss, probe, done, global;

  // Get the receiver of the function from the stack into r1.
  __ ldr(r1, MemOperand(sp, argc * kPointerSize));
  // Get the name of the function from the stack; 1 ~ receiver.
  __ ldr(r2, MemOperand(sp, (argc + 1) * kPointerSize));

  // Check that the receiver isn't a smi.
  __ tst(r1, Operand(kSmiTagMask));
  __ b(eq, &miss);

  // Check that the receiver is a valid JS object.
  __ ldr(r0, FieldMemOperand(r1, HeapObject::kMapOffset));
  __ ldrb(r0, FieldMemOperand(r0, Map::kInstanceTypeOffset));
  __ cmp(r0, Operand(FIRST_JS_OBJECT_TYPE));
  __ b(lt, &miss);

  // 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(r0, Operand(JS_GLOBAL_OBJECT_TYPE));
  __ b(eq, &global);

  // Search the dictionary placing the result in r1.
  __ bind(&probe);
  GenerateDictionaryLoad(masm, &done, &miss, r0, r1);

  // Check that the value isn't a smi.
  __ tst(r1, Operand(kSmiTagMask));
  __ b(eq, &miss);

  // Check that the value is a JSFunction.
  __ ldr(r0, FieldMemOperand(r1, HeapObject::kMapOffset));
  __ ldrb(r0, FieldMemOperand(r0, Map::kInstanceTypeOffset));
  __ cmp(r0, Operand(JS_FUNCTION_TYPE));
  __ b(ne, &miss);

  // Patch the function on the stack; 1 ~ receiver.
  __ str(r1, MemOperand(sp, (argc + 1) * kPointerSize));

  // Invoke the function.
  ParameterCount actual(argc);
  __ InvokeFunction(r1, actual, JUMP_FUNCTION);

  // Global object access: Check access rights.
  __ bind(&global);
  __ CheckAccessGlobal(r1, r0, &miss);
  __ b(&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 -------------
  //  -- lr: return address
  // -----------------------------------

  // Get the receiver of the function from the stack.
  __ ldr(r2, MemOperand(sp, argc * kPointerSize));
  // Get the name of the function to call from the stack.
  __ ldr(r1, MemOperand(sp, (argc + 1) * kPointerSize));

  __ EnterInternalFrame();

  // Push the receiver and the name of the function.
  __ stm(db_w, sp, r1.bit() | r2.bit());

  // Call the entry.
  __ mov(r0, Operand(2));
  __ mov(r1, Operand(f));

  CEntryStub stub;
  __ CallStub(&stub);

  // Move result to r1.
  __ mov(r1, Operand(r0));

  __ LeaveInternalFrame();

  // Patch the function on the stack; 1 ~ receiver.
  __ str(r1, MemOperand(sp, (argc + 1) * kPointerSize));

  // Invoke the function.
  ParameterCount actual(argc);
  __ InvokeFunction(r1, actual, JUMP_FUNCTION);
}


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

void LoadIC::GenerateMegamorphic(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- r2    : name
  //  -- lr    : return address
  //  -- [sp]  : receiver
  // -----------------------------------

  __ ldr(r0, MemOperand(sp, 0));
  // Probe the stub cache.
  Code::Flags flags = Code::ComputeFlags(Code::LOAD_IC, MONOMORPHIC);
  StubCache::GenerateProbe(masm, flags, r0, r2, r3);

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


void LoadIC::GenerateNormal(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- r2    : name
  //  -- lr    : return address
  //  -- [sp]  : receiver
  // -----------------------------------

  Label miss, probe, done, global;

  __ ldr(r0, MemOperand(sp, 0));
  // Check that the receiver isn't a smi.
  __ tst(r0, Operand(kSmiTagMask));
  __ b(eq, &miss);

  // Check that the receiver is a valid JS object.
  __ ldr(r1, FieldMemOperand(r0, HeapObject::kMapOffset));
  __ ldrb(r1, FieldMemOperand(r1, Map::kInstanceTypeOffset));
  __ cmp(r1, Operand(FIRST_JS_OBJECT_TYPE));
  __ b(lt, &miss);
  // 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(r1, Operand(JS_GLOBAL_OBJECT_TYPE));
  __ b(eq, &global);


  __ bind(&probe);
  GenerateDictionaryLoad(masm, &done, &miss, r1, r0);
  __ Ret();

  // Global object access: Check access rights.
  __ bind(&global);
  __ CheckAccessGlobal(r0, r1, &miss);
  __ b(&probe);

  // Cache miss: Restore receiver from stack and jump to runtime.
  __ bind(&miss);
  Generate(masm, ExternalReference(IC_Utility(kLoadIC_Miss)));
}


void LoadIC::GenerateMiss(MacroAssembler* masm) {
  Generate(masm, ExternalReference(IC_Utility(kLoadIC_Miss)));
}


void LoadIC::Generate(MacroAssembler* masm, const ExternalReference& f) {
  // ----------- S t a t e -------------
  //  -- r2    : name
  //  -- lr    : return address
  //  -- [sp]  : receiver
  // -----------------------------------

  __ ldr(r0, MemOperand(sp, 0));
  __ push(r0);
  __ push(r2);

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


// TODO(1224671): ICs for keyed load/store is not implemented on ARM.
void KeyedLoadIC::GenerateMiss(MacroAssembler* masm) {
}

void KeyedLoadIC::Generate(MacroAssembler* masm, const ExternalReference& f) {
}

void KeyedLoadIC::GenerateGeneric(MacroAssembler* masm) {
}

void KeyedStoreIC::Generate(MacroAssembler* masm,
                            const ExternalReference& f) {
}

void KeyedStoreIC::GenerateGeneric(MacroAssembler* masm) {
}


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

void StoreIC::GenerateMegamorphic(MacroAssembler* masm) {
  // ----------- S t a t e -------------
  //  -- r0    : value
  //  -- r2    : name
  //  -- lr    : return address
  //  -- [sp]  : receiver
  // -----------------------------------

  // Get the receiver from the stack and probe the stub cache.
  __ ldr(r1, MemOperand(sp));
  Code::Flags flags = Code::ComputeFlags(Code::STORE_IC, MONOMORPHIC);
  StubCache::GenerateProbe(masm, flags, r1, r2, r3);

  // 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 -------------
  //  -- r0    : value
  //  -- r2    : name
  //  -- lr    : return address
  //  -- [sp]  : receiver
  // -----------------------------------

  __ ldr(r3, MemOperand(sp));  // copy receiver
  __ stm(db_w, sp, r0.bit() | r2.bit() | r3.bit());

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


#undef __


} }  // namespace v8::internal