[Interpreter] Add CallRuntime support to the interpreter.

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index 163fdd880862083f703c908e50695871c7589a17..81236acb5fecdcfa29e3d3d5fcff0e57bef9f70e 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -1823,9 +1823,11 @@ std::ostream& operator<<(std::ostream& os, const CompareNilICStub::State& s);
 class CEntryStub : public PlatformCodeStub {
  public:
   CEntryStub(Isolate* isolate, int result_size,
-             SaveFPRegsMode save_doubles = kDontSaveFPRegs)
+             SaveFPRegsMode save_doubles = kDontSaveFPRegs,
+             ArgvMode argv_mode = kArgvOnStack)
       : PlatformCodeStub(isolate) {
-    minor_key_ = SaveDoublesBits::encode(save_doubles == kSaveFPRegs);
+    minor_key_ = SaveDoublesBits::encode(save_doubles == kSaveFPRegs) |
+                 ArgvMode::encode(argv_mode == kArgvInRegister);
     DCHECK(result_size == 1 || result_size == 2);
 #if _WIN64 || V8_TARGET_ARCH_PPC
     minor_key_ = ResultSizeBits::update(minor_key_, result_size);
@@ -1840,6 +1842,7 @@ class CEntryStub : public PlatformCodeStub {
 
  private:
   bool save_doubles() const { return SaveDoublesBits::decode(minor_key_); }
+  bool argv_in_register() const { return ArgvMode::decode(minor_key_); }
 #if _WIN64 || V8_TARGET_ARCH_PPC
   int result_size() const { return ResultSizeBits::decode(minor_key_); }
 #endif  // _WIN64
@@ -1847,7 +1850,8 @@ class CEntryStub : public PlatformCodeStub {
   bool NeedsImmovableCode() override;
 
   class SaveDoublesBits : public BitField<bool, 0, 1> {};
-  class ResultSizeBits : public BitField<int, 1, 3> {};
+  class ArgvMode : public BitField<bool, 1, 1> {};
+  class ResultSizeBits : public BitField<int, 2, 3> {};
 
   DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR();
   DEFINE_PLATFORM_CODE_STUB(CEntry, PlatformCodeStub);