X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=src%2Fcc65%2Freginfo.h;h=ad49043d357683a56bfb48fbb34be126c6c62e44;hb=aef8789873bd008d42aa50330ca98488fad91b31;hp=9b2abc86658151ecae566e8743847eeb0bafc65f;hpb=0a9324d9c6b78c01bf57099ca26e1347d56e2e3d;p=cc65

diff --git a/src/cc65/reginfo.h b/src/cc65/reginfo.h
index 9b2abc866..ad49043d3 100644
--- a/src/cc65/reginfo.h
+++ b/src/cc65/reginfo.h
@@ -44,11 +44,14 @@
 
 
 /*****************************************************************************/
-/*  	       	   	  	     Data				     */
+/*  	       	   	       	     Data				     */
 /*****************************************************************************/
 
 
 
+/* Encoding for an unknown register value */
+#define UNKNOWN_REGVAL  -1
+
 /* Register contents */
 typedef struct RegContents RegContents;
 struct RegContents {
@@ -82,6 +85,26 @@ void RC_Invalidate (RegContents* C);
 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
+
 RegInfo* NewRegInfo (const RegContents* RC);
 /* Allocate a new register info, initialize and return it. If RC is not
  * a NULL pointer, it is used to initialize both, the input and output
@@ -93,9 +116,11 @@ void FreeRegInfo (RegInfo* RI);
 
 
 
+
+
 /* End of reginfo.h */
 #endif
 
 
 
-		    
+