+void RC_InvalidateZP (RegContents* C);
+/* Invalidate all ZP registers */
+
+#if defined(HAVE_INLINE)
+INLINE int RegValIsKnown (short Val)
+/* Return true if the register value is known */
+{
+ return (Val >= 0);
+}
+#else
+# define RegValIsKnown(S) ((S) >= 0)
+#endif
+
+#if defined(HAVE_INLINE)
+INLINE int RegValIsUnknown (short Val)
+/* Return true if the register value is not known */
+{
+ return (Val < 0);
+}
+#else
+# define RegValIsUnknown(S) ((S) < 0)
+#endif
+