stub-cache-arm.cc.svn-base

Google浏览器V8内核代码

  __ ldr(r1, FieldMemOperand(r3, HeapObject::kMapOffset));
  __ cmp(r1, Operand(Handle<Map>(object->map())));
  __ b(ne, &miss);

  // Perform global security token check if needed.
  if (object->IsJSGlobalObject()) {
    __ CheckAccessGlobal(r3, r1, &miss);
  }

  // Stub never generated for non-global objects that require access
  // checks.
  ASSERT(object->IsJSGlobalObject() || !object->IsAccessCheckNeeded());

  // Get the properties array
  __ ldr(r1, FieldMemOperand(r3, JSObject::kPropertiesOffset));

  // Perform map transition for the receiver if necessary.
  if (transition != NULL) {
    // Update the map of the object; no write barrier updating is
    // needed because the map is never in new space.
    __ mov(ip, Operand(Handle<Map>(transition)));
    __ str(ip, FieldMemOperand(r3, HeapObject::kMapOffset));
  }

  // Write to the properties array.
  int offset = index * kPointerSize + Array::kHeaderSize;
  __ str(r0, FieldMemOperand(r1, offset));

  // Skip updating write barrier if storing a smi.
  __ tst(r0, Operand(kSmiTagMask));
  __ b(eq, &exit);

  // Update the write barrier for the array address.
  __ mov(r3, Operand(offset));
  __ RecordWrite(r1, r3, r2);  // OK to clobber r2, since we return

  // Return the value (register r0).
  __ bind(&exit);
  __ Ret();

  // Handle store cache miss.
  __ bind(&miss);
  __ mov(r2, Operand(Handle<String>(name)));  // restore name
  Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
  __ Jump(ic, RelocInfo::CODE_TARGET);

  // Return the generated code.
  return GetCode(transition == NULL ? FIELD : MAP_TRANSITION);
}


Object* StoreStubCompiler::CompileStoreCallback(JSObject* object,
                                                AccessorInfo* callback,
                                                String* name) {
  // ----------- S t a t e -------------
  //  -- r0    : value
  //  -- r2    : name
  //  -- lr    : return address
  //  -- [sp]  : receiver
  // -----------------------------------

  HandleScope scope;
  Label miss;

  // Get the object from the stack.
  __ ldr(r3, MemOperand(sp, 0 * kPointerSize));

  // Check that the object isn't a smi.
  __ tst(r3, Operand(kSmiTagMask));
  __ b(eq, &miss);

  // Check that the map of the object hasn't changed.
  __ ldr(r1, FieldMemOperand(r3, HeapObject::kMapOffset));
  __ cmp(r1, Operand(Handle<Map>(object->map())));
  __ b(ne, &miss);

  // Perform global security token check if needed.
  if (object->IsJSGlobalObject()) {
    __ CheckAccessGlobal(r3, r1, &miss);
  }

  // Stub never generated for non-global objects that require access
  // checks.
  ASSERT(object->IsJSGlobalObject() || !object->IsAccessCheckNeeded());

  __ ldr(ip, MemOperand(sp));  // receiver
  __ push(ip);
  __ mov(ip, Operand(Handle<AccessorInfo>(callback)));  // callback info
  __ push(ip);
  __ push(r2);  // name
  __ push(r0);  // value

  // Do tail-call to the runtime system.
  ExternalReference store_callback_property =
      ExternalReference(IC_Utility(IC::kStoreCallbackProperty));
  __ TailCallRuntime(store_callback_property, 4);

  // Handle store cache miss.
  __ bind(&miss);
  __ mov(r2, Operand(Handle<String>(name)));  // restore name
  Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
  __ Jump(ic, RelocInfo::CODE_TARGET);

  // Return the generated code.
  return GetCode(CALLBACKS);
}


Object* StoreStubCompiler::CompileStoreInterceptor(JSObject* receiver,
                                                   String* name) {
  // ----------- S t a t e -------------
  //  -- r0    : value
  //  -- r2    : name
  //  -- lr    : return address
  //  -- [sp]  : receiver
  // -----------------------------------

  HandleScope scope;
  Label miss;

  // Get the object from the stack.
  __ ldr(r3, MemOperand(sp, 0 * kPointerSize));

  // Check that the object isn't a smi.
  __ tst(r3, Operand(kSmiTagMask));
  __ b(eq, &miss);

  // Check that the map of the object hasn't changed.
  __ ldr(r1, FieldMemOperand(r3, HeapObject::kMapOffset));
  __ cmp(r1, Operand(Handle<Map>(receiver->map())));
  __ b(ne, &miss);

  // Perform global security token check if needed.
  if (receiver->IsJSGlobalObject()) {
    __ CheckAccessGlobal(r3, r1, &miss);
  }

  // Stub never generated for non-global objects that require access
  // checks.
  ASSERT(receiver->IsJSGlobalObject() || !receiver->IsAccessCheckNeeded());

  __ ldr(ip, MemOperand(sp));  // receiver
  __ push(ip);
  __ push(r2);  // name
  __ push(r0);  // value

  // Do tail-call to the runtime system.
  ExternalReference store_ic_property =
      ExternalReference(IC_Utility(IC::kStoreInterceptorProperty));
  __ TailCallRuntime(store_ic_property, 3);

  // Handle store cache miss.
  __ bind(&miss);
  __ mov(r2, Operand(Handle<String>(name)));  // restore name
  Handle<Code> ic(Builtins::builtin(Builtins::StoreIC_Miss));
  __ Jump(ic, RelocInfo::CODE_TARGET);

  // Return the generated code.
  return GetCode(INTERCEPTOR);
}


Object* LoadStubCompiler::CompileLoadField(JSObject* object,
                                           JSObject* holder,
                                           int index) {
  // ----------- S t a t e -------------
  //  -- r2    : name
  //  -- lr    : return address
  //  -- [sp]  : receiver
  // -----------------------------------

  HandleScope scope;
  Label miss;

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

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

  // Check that the maps haven't changed.
  Register reg = __ CheckMaps(object, r0, holder, r3, r1, &miss);

  // Get the properties array of the holder.
  __ ldr(r3, FieldMemOperand(reg, JSObject::kPropertiesOffset));

  // Return the value from the properties array.
  int offset = index * kPointerSize + Array::kHeaderSize;
  __ ldr(r0, FieldMemOperand(r3, offset));
  __ Ret();

  // Handle load cache miss.
  __ bind(&miss);
  __ ldr(r0, MemOperand(sp));  // restore receiver
  Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Miss));
  __ Jump(ic, RelocInfo::CODE_TARGET);

  // Return the generated code.
  return GetCode(FIELD);
}


Object* LoadStubCompiler::CompileLoadCallback(JSObject* object,
                                              JSObject* holder,
                                              AccessorInfo* callback) {
  // ----------- S t a t e -------------
  //  -- r2    : name
  //  -- lr    : return address
  //  -- [sp]  : receiver
  // -----------------------------------

  HandleScope scope;
  Label miss;

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

  // Check that the maps haven't changed.
  Register reg = __ CheckMaps(object, r0, holder, r3, r1, &miss);

  // Push the arguments on the JS stack of the caller.
  __ push(r0);  // receiver
  __ mov(ip, Operand(Handle<AccessorInfo>(callback)));  // callback data
  __ push(ip);
  __ push(r2);  // name
  __ push(reg);  // holder

  // Do tail-call to the runtime system.
  ExternalReference load_callback_property =
      ExternalReference(IC_Utility(IC::kLoadCallbackProperty));
  __ TailCallRuntime(load_callback_property, 4);

  // Handle load cache miss.
  __ bind(&miss);
  Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Miss));
  __ Jump(ic, RelocInfo::CODE_TARGET);

  // Return the generated code.
  return GetCode(CALLBACKS);
}


Object* LoadStubCompiler::CompileLoadConstant(JSObject* object,
                                              JSObject* holder,
                                              Object* value) {
  // ----------- S t a t e -------------
  //  -- r2    : name
  //  -- lr    : return address
  //  -- [sp] : receiver
  // -----------------------------------

  HandleScope scope;
  Label miss;

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

  // Check that the maps haven't changed.
  Register reg = __ CheckMaps(object, r0, holder, r3, r1, &miss);

  // Return the constant value.
  __ mov(r0, Operand(Handle<Object>(value)));
  __ Ret();

  // Handle load cache miss.
  __ bind(&miss);
  Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Miss));
  __ Jump(ic, RelocInfo::CODE_TARGET);

  // Return the generated code.
  return GetCode(CONSTANT_FUNCTION);
}


Object* LoadStubCompiler::CompileLoadInterceptor(JSObject* object,
                                                 JSObject* holder,
                                                 String* name) {
  // ----------- S t a t e -------------
  //  -- r2    : name
  //  -- lr    : return address
  //  -- [sp]  : receiver
  // -----------------------------------

  HandleScope scope;
  Label miss;

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

  // Check that the maps haven't changed.
  Register reg = __ CheckMaps(object, r0, holder, r3, r1, &miss);

  // Push the arguments on the JS stack of the caller.
  __ push(r0);  // receiver
  __ push(reg);  // holder
  __ push(r2);  // name

  // Do tail-call to the runtime system.
  ExternalReference load_ic_property =
      ExternalReference(IC_Utility(IC::kLoadInterceptorProperty));
  __ TailCallRuntime(load_ic_property, 3);

  // Handle load cache miss.
  __ bind(&miss);
  Handle<Code> ic(Builtins::builtin(Builtins::LoadIC_Miss));
  __ Jump(ic, RelocInfo::CODE_TARGET);

  // Return the generated code.
  return GetCode(INTERCEPTOR);
}


// TODO(1224671): IC stubs for keyed loads have not been implemented
// for ARM.
Object* KeyedLoadStubCompiler::CompileLoadField(String* name,
                                                JSObject* receiver,
                                                JSObject* holder,
                                                int index) {
  UNIMPLEMENTED();
  return Heap::undefined_value();
}


Object* KeyedLoadStubCompiler::CompileLoadCallback(String* name,
                                                   JSObject* receiver,
                                                   JSObject* holder,
                                                   AccessorInfo* callback) {
  UNIMPLEMENTED();
  return Heap::undefined_value();
}


Object* KeyedLoadStubCompiler::CompileLoadConstant(String* name,
                                                   JSObject* receiver,
                                                   JSObject* holder,
                                                   Object* value) {
  UNIMPLEMENTED();
  return Heap::undefined_value();
}


Object* KeyedLoadStubCompiler::CompileLoadInterceptor(JSObject* receiver,
                                                      JSObject* holder,
                                                      String* name) {
  UNIMPLEMENTED();
  return Heap::undefined_value();
}


Object* KeyedLoadStubCompiler::CompileLoadArrayLength(String* name) {
  UNIMPLEMENTED();
  return Heap::undefined_value();
}


Object* KeyedLoadStubCompiler::CompileLoadShortStringLength(String* name) {
  UNIMPLEMENTED();
  return Heap::undefined_value();
}


Object* KeyedLoadStubCompiler::CompileLoadMediumStringLength(String* name) {
  UNIMPLEMENTED();
  return Heap::undefined_value();
}


Object* KeyedLoadStubCompiler::CompileLoadLongStringLength(String* name) {
  UNIMPLEMENTED();
  return Heap::undefined_value();
}


Object* KeyedLoadStubCompiler::CompileLoadFunctionPrototype(String* name) {
  UNIMPLEMENTED();
  return Heap::undefined_value();
}


Object* KeyedStoreStubCompiler::CompileStoreField(JSObject* object,
                                                  int index,
                                                  Map* transition,
                                                  String* name) {
  UNIMPLEMENTED();
  return Heap::undefined_value();
}



#undef __

} }  // namespace v8::internal