[Interpreter] Handle negative ints in generate-bytecode-expectations.

src/interpreter/bytecodes.h

Index: src/interpreter/bytecodes.h
diff --git a/src/interpreter/bytecodes.h b/src/interpreter/bytecodes.h
index d7a9a43b446656182584ac49ff41e30b86626782..f34350044bb8697878f6a10168377c2bafea0e91 100644
--- a/src/interpreter/bytecodes.h
+++ b/src/interpreter/bytecodes.h
@@ -463,9 +463,11 @@ class Bytecodes {
   // Returns true if the bytecode is a conditional jump, a jump, or a return.
   static bool IsJumpOrReturn(Bytecode bytecode);
 
-  // Returns true if |operand_type| is a maybe register operand
-  // (kMaybeReg8/kMaybeReg16).
-  static bool IsMaybeRegisterOperandType(OperandType operand_type);
+  // Returns true if |operand_type| is a register index operand (kIdx8/kIdx16).
+  static bool IsIndexOperandType(OperandType operand_type);
+
+  // Returns true if |operand_type| represents an immediate.
+  static bool IsImmediateOperandType(OperandType operand_type);
 
   // Returns true if |operand_type| is a register count operand
   // (kRegCount8/kRegCount16).
@@ -480,6 +482,10 @@ class Bytecodes {
   // Returns true if |operand_type| represents a register used as an output.
   static bool IsRegisterOutputOperandType(OperandType operand_type);
 
+  // Returns true if |operand_type| is a maybe register operand
+  // (kMaybeReg8/kMaybeReg16).
+  static bool IsMaybeRegisterOperandType(OperandType operand_type);
+
   // Decode a single bytecode and operands to |os|.
   static std::ostream& Decode(std::ostream& os, const uint8_t* bytecode_start,
                               int number_of_parameters);