[Interpreter] Add support for short (16 bit) operands.

src/interpreter/bytecode-array-iterator.h

Index: src/interpreter/bytecode-array-iterator.h
diff --git a/src/interpreter/bytecode-array-iterator.h b/src/interpreter/bytecode-array-iterator.h
index 0d9011f242eef9c85aea247eafd280d68e83743b..4be7adc354d55a16ab6586a1bc7ec2460ae8130c 100644
--- a/src/interpreter/bytecode-array-iterator.h
+++ b/src/interpreter/bytecode-array-iterator.h
@@ -25,14 +25,14 @@ class BytecodeArrayIterator {
     return bytecode_array_;
   }
 
-  int8_t GetSmi8Operand(int operand_index) const;
+  int8_t GetImmediateOperand(int operand_index) const;
   int GetIndexOperand(int operand_index) const;
   Register GetRegisterOperand(int operand_index) const;
   Handle<Object> GetConstantForIndexOperand(int operand_index) const;
 
   // Get the raw byte for the given operand. Note: you should prefer using the
   // typed versions above which cast the return to an appropriate type.
-  uint8_t GetRawOperand(int operand_index, OperandType operand_type) const;
+  uint32_t GetRawOperand(int operand_index, OperandType operand_type) const;
 
  private:
   Handle<BytecodeArray> bytecode_array_;