1 /*****************************************************************************/
5 /* Additional information about 6502 code */
9 /* (C) 2001 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 /*****************************************************************************/
41 /*****************************************************************************/
43 /*****************************************************************************/
51 /*****************************************************************************/
53 /*****************************************************************************/
57 /* Defines for registers. */
58 #define REG_NONE 0x0000U
62 #define REG_TMP1 0x0008U
63 #define REG_PTR1_LO 0x0010U
64 #define REG_PTR1_HI 0x0020U
65 #define REG_PTR2_LO 0x0040U
66 #define REG_PTR2_HI 0x0080U
67 #define REG_SREG_LO 0x0100U
68 #define REG_SREG_HI 0x0200U
69 #define REG_SAVE_LO 0x0400U
70 #define REG_SAVE_HI 0x0800U
71 #define REG_SP_LO 0x1000U
72 #define REG_SP_HI 0x2000U
75 /* Combined register defines */
76 #define REG_PTR1 (REG_PTR1_LO | REG_PTR1_HI)
77 #define REG_PTR2 (REG_PTR2_LO | REG_PTR2_HI)
78 #define REG_SREG (REG_SREG_LO | REG_SREG_HI)
79 #define REG_SAVE (REG_SAVE_LO | REG_SAVE_HI)
80 #define REG_SP (REG_SP_LO | REG_SP_HI)
81 #define REG_AX (REG_A | REG_X)
82 #define REG_AY (REG_A | REG_Y)
83 #define REG_XY (REG_X | REG_Y)
84 #define REG_AXY (REG_AX | REG_Y)
85 #define REG_EAX (REG_AX | REG_SREG)
86 #define REG_EAXY (REG_EAX | REG_Y)
87 #define REG_ZP 0xFFF8U
88 #define REG_ALL 0xFFFFU
92 /* Zero page register info */
93 typedef struct ZPInfo ZPInfo;
95 unsigned char Len; /* Length of the following string */
96 char Name[11]; /* Name of zero page symbol */
97 unsigned short ByteUse; /* Register info for this symbol */
98 unsigned short WordUse; /* Register info for 16 bit access */
103 /*****************************************************************************/
105 /*****************************************************************************/
109 void GetFuncInfo (const char* Name, unsigned short* Use, unsigned short* Chg);
110 /* For the given function, lookup register information and store it into
111 * the given variables. If the function is unknown, assume it will use and
112 * load all registers.
115 const ZPInfo* GetZPInfo (const char* Name);
116 /* If the given name is a zero page symbol, return a pointer to the info
117 * struct for this symbol, otherwise return NULL.
120 unsigned GetRegInfo (struct CodeSeg* S, unsigned Index, unsigned Wanted);
121 /* Determine register usage information for the instructions starting at the
125 int RegAUsed (struct CodeSeg* S, unsigned Index);
126 /* Check if the value in A is used. */
128 int RegXUsed (struct CodeSeg* S, unsigned Index);
129 /* Check if the value in X is used. */
131 int RegYUsed (struct CodeSeg* S, unsigned Index);
132 /* Check if the value in Y is used. */
134 int RegAXUsed (struct CodeSeg* S, unsigned Index);
135 /* Check if the value in A or(!) the value in X are used. */
139 /* End of codeinfo.h */