[stubs] Port LoadFieldStub to TF

src/interface-descriptors.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/interface-descriptors.h"
 
 namespace v8 {
 namespace internal {
 
 
@@ skipping 72 matching lines @@
   data->InitializePlatformIndependent(arraysize(machine_types), 0,
                                       machine_types);
 }
 
 void LoadDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {ReceiverRegister(), NameRegister(), SlotRegister()};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
+void LoadFieldDescriptor::InitializePlatformIndependent(
+    CallInterfaceDescriptorData* data) {
+  // kReceiver, kSmiHandler
+  MachineType machine_types[] = {MachineType::AnyTagged(),
+                                 MachineType::AnyTagged()};
+  data->InitializePlatformIndependent(arraysize(machine_types), 0,
+                                      machine_types);
+}
+
+void LoadFieldDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {ReceiverRegister(), SmiHandlerRegister()};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
 void LoadGlobalDescriptor::InitializePlatformIndependent(
     CallInterfaceDescriptorData* data) {
   // kName, kSlot
   MachineType machine_types[] = {MachineType::AnyTagged(),
                                  MachineType::TaggedSigned()};
   data->InitializePlatformIndependent(arraysize(machine_types), 0,
                                       machine_types);
 }
 
 void LoadGlobalDescriptor::InitializePlatformSpecific(
@@ skipping 127 matching lines @@
   Register registers[] = {exponent()};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
 void MathPowIntegerDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {exponent()};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
+const Register LoadFieldDescriptor::ReceiverRegister() {
+  // Reuse the register from the LoadDescriptor, since given the
+  // LoadFieldDescriptor's usage, it doesn't matter exactly which registers are
+  // used to pass parameters in.
+  return LoadDescriptor::ReceiverRegister();
+}
+const Register LoadFieldDescriptor::SmiHandlerRegister() {
+  // Reuse the register from the LoadDescriptor, since given the
+  // LoadFieldDescriptor's usage, it doesn't matter exactly which registers are
+  // used to pass parameters in.
+  return LoadDescriptor::NameRegister();
+}
+
 void LoadWithVectorDescriptor::InitializePlatformIndependent(
     CallInterfaceDescriptorData* data) {
   // kReceiver, kName, kSlot, kVector
   MachineType machine_types[] = {
       MachineType::AnyTagged(), MachineType::AnyTagged(),
       MachineType::TaggedSigned(), MachineType::AnyTagged()};
   data->InitializePlatformIndependent(arraysize(machine_types), 0,
                                       machine_types);
 }
 
@@ skipping 301 matching lines @@
     CallInterfaceDescriptorData* data) {
   // kNumberOfArguments, kFirstArgument, kFunctionEntry
   MachineType machine_types[] = {MachineType::Int32(), MachineType::Pointer(),
                                  MachineType::Pointer()};
   data->InitializePlatformIndependent(arraysize(machine_types), 0,
                                       machine_types);
 }
 
 }  // namespace internal
 }  // namespace v8