1 /*****************************************************************************/
5 /* 6502 register tracking info */
9 /* (C) 2001-2002 Ullrich von Bassewitz */
11 /* D-70597 Stuttgart */
12 /* EMail: uz@cc65.org */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
46 /*****************************************************************************/
48 /*****************************************************************************/
52 /* Encoding for an unknown register value */
53 #define UNKNOWN_REGVAL -1
55 /* Register contents */
56 typedef struct RegContents RegContents;
66 /* Register change info */
67 typedef struct RegInfo RegInfo;
69 RegContents In; /* Incoming register values */
70 RegContents Out; /* Outgoing register values */
71 RegContents Out2; /* Alternative outgoing reg values for branches */
76 /*****************************************************************************/
78 /*****************************************************************************/
82 void RC_Invalidate (RegContents* C);
83 /* Invalidate all registers */
85 void RC_InvalidateZP (RegContents* C);
86 /* Invalidate all ZP registers */
88 #if defined(HAVE_INLINE)
89 INLINE int RegValIsKnown (short Val)
90 /* Return true if the register value is known */
95 # define RegValIsKnown(S) ((S) >= 0)
98 #if defined(HAVE_INLINE)
99 INLINE int RegValIsUnknown (short Val)
100 /* Return true if the register value is not known */
105 # define RegValIsUnknown(S) ((S) < 0)
108 RegInfo* NewRegInfo (const RegContents* RC);
109 /* Allocate a new register info, initialize and return it. If RC is not
110 * a NULL pointer, it is used to initialize both, the input and output
111 * registers. If the pointer is NULL, all registers are set to unknown.
114 void FreeRegInfo (RegInfo* RI);
115 /* Free a RegInfo struct */
121 /* End of reginfo.h */