[Interpreter] Add CallRuntime support to the interpreter.

src/assembler.h

Index: src/assembler.h
diff --git a/src/assembler.h b/src/assembler.h
index 433b9b8456dc869ad6774e166b0bb9f8509c9c03..2116d379babfb4a42fda86e468c9af2332e2dfab 100644
--- a/src/assembler.h
+++ b/src/assembler.h
@@ -319,6 +319,8 @@ class Label {
 
 enum SaveFPRegsMode { kDontSaveFPRegs, kSaveFPRegs };
 
+enum ArgvMode { kArgvOnStack, kArgvInRegister };
+
 // Specifies whether to perform icache flush operations on RelocInfo updates.
 // If FLUSH_ICACHE_IF_NEEDED, the icache will always be flushed if an
 // instruction was modified. If SKIP_ICACHE_FLUSH the flush will always be
@@ -992,6 +994,8 @@ class ExternalReference BASE_EMBEDDED {
 
   static ExternalReference vector_store_virtual_register(Isolate* isolate);
 
+  static ExternalReference runtime_function_table_address(Isolate* isolate);
+
   Address address() const { return reinterpret_cast<Address>(address_); }
 
   // Used to check if single stepping is enabled in generated code.