-/* This operand is optional. Only a single operand at the end of
- the instruction may be optional. */
-#define S390_OPERAND_OPTIONAL 0x400
+/* The operand needs to be a valid GP or FP register pair. */
+#define S390_OPERAND_REG_PAIR 0x400
+
+/* This operand names a vector register. The disassembler uses this
+ to print register names with a leading 'v'. */
+#define S390_OPERAND_VR 0x800
+
+#define S390_OPERAND_CP16 0x1000