[stubs] A new approach to TF stubs

src/interface-descriptors.h

 // Copyright 2014 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.
 
 #ifndef V8_CALL_INTERFACE_DESCRIPTOR_H_
 #define V8_CALL_INTERFACE_DESCRIPTOR_H_
 
 #include "src/assembler.h"
 #include "src/macro-assembler.h"
 
 namespace v8 {
 namespace internal {
 
 class PlatformInterfaceDescriptor;
 
 #define INTERFACE_DESCRIPTOR_LIST(V)          \
+  V(Void)                                     \
   V(Load)                                     \
   V(Store)                                    \
   V(StoreTransition)                          \
   V(VectorStoreTransition)                    \
   V(VectorStoreICTrampoline)                  \
   V(VectorStoreIC)                            \
   V(InstanceOf)                               \
   V(LoadWithVector)                           \
   V(FastNewClosure)                           \
   V(FastNewContext)                           \
@@ skipping 39 matching lines @@
   V(ApiGetter)                                \
   V(ArgumentsAccessRead)                      \
   V(ArgumentsAccessNew)                       \
   V(StoreArrayLiteralElement)                 \
   V(LoadGlobalViaContext)                     \
   V(StoreGlobalViaContext)                    \
   V(MathPowTagged)                            \
   V(MathPowInteger)                           \
   V(ContextOnly)                              \
   V(GrowArrayElements)                        \
-  V(MathRoundVariantCallFromUnoptimizedCode)  \
-  V(MathRoundVariantCallFromOptimizedCode)    \
   V(InterpreterPushArgsAndCall)               \
   V(InterpreterPushArgsAndConstruct)          \
   V(InterpreterCEntry)
 
 
 class CallInterfaceDescriptorData {
  public:
   CallInterfaceDescriptorData()
       : register_param_count_(-1), function_type_(nullptr) {}
 
@@ skipping 138 matching lines @@
   static inline CallDescriptors::Key key();
 
 
 #define DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE(name, base) \
   DECLARE_DESCRIPTOR(name, base)                                 \
  protected:                                                      \
   Type::FunctionType* BuildCallInterfaceDescriptorFunctionType(  \
       Isolate* isolate, int register_param_count) override;      \
                                                                  \
  public:
+
+
+class VoidDescriptor : public CallInterfaceDescriptor {
+ public:
+  DECLARE_DESCRIPTOR(VoidDescriptor, CallInterfaceDescriptor)
+};
+
+
 // LoadDescriptor is used by all stubs that implement Load/KeyedLoad ICs.
 class LoadDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE(LoadDescriptor,
                                                CallInterfaceDescriptor)
 
   enum ParameterIndices { kReceiverIndex, kNameIndex, kSlotIndex };
   static const Register ReceiverRegister();
   static const Register NameRegister();
   static const Register SlotRegister();
@@ skipping 466 matching lines @@
 
 
 class MathPowIntegerDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR(MathPowIntegerDescriptor, CallInterfaceDescriptor)
 
   static const Register exponent();
 };
 
 
-class MathRoundVariantCallFromOptimizedCodeDescriptor
-    : public CallInterfaceDescriptor {
- public:
-  DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE(
-      MathRoundVariantCallFromOptimizedCodeDescriptor, CallInterfaceDescriptor)
-};
-
-
-class MathRoundVariantCallFromUnoptimizedCodeDescriptor
-    : public CallInterfaceDescriptor {
- public:
-  DECLARE_DESCRIPTOR_WITH_CUSTOM_FUNCTION_TYPE(
-      MathRoundVariantCallFromUnoptimizedCodeDescriptor,
-      CallInterfaceDescriptor)
-};
-
-
 class ContextOnlyDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR(ContextOnlyDescriptor, CallInterfaceDescriptor)
 };
 
 
 class GrowArrayElementsDescriptor : public CallInterfaceDescriptor {
  public:
   DECLARE_DESCRIPTOR(GrowArrayElementsDescriptor, CallInterfaceDescriptor)
 
@@ skipping 37 matching lines @@
 }  // namespace v8
 
 
 #if V8_TARGET_ARCH_ARM64
 #include "src/arm64/interface-descriptors-arm64.h"
 #elif V8_TARGET_ARCH_ARM
 #include "src/arm/interface-descriptors-arm.h"
 #endif
 
 #endif  // V8_CALL_INTERFACE_DESCRIPTOR_H_