[Interpreter] Add support for JS calls.

src/interpreter/bytecodes.h

Index: src/interpreter/bytecodes.h
diff --git a/src/interpreter/bytecodes.h b/src/interpreter/bytecodes.h
index 01552a35ec00123ade99950d60fb11774cea225b..0c9424c305e7327dd045374d43ba417c41e64b28 100644
--- a/src/interpreter/bytecodes.h
+++ b/src/interpreter/bytecodes.h
@@ -18,6 +18,7 @@ namespace interpreter {
 // The list of operand types used by bytecodes.
 #define OPERAND_TYPE_LIST(V) \
   V(None)                    \
+  V(Count)                   \
   V(Imm8)                    \
   V(Idx)                     \
   V(Reg)
@@ -50,6 +51,9 @@ namespace interpreter {
   V(Div, OperandType::kReg)                            \
   V(Mod, OperandType::kReg)                            \
                                                        \
+  /* Call operations. */                               \
+  V(CallJS, OperandType::kReg, OperandType::kCount)    \
+                                                       \
   /* Control Flow */                                   \
   V(Return, OperandType::kNone)