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_TMP2 0x0010U
64 #define REG_TMP3 0x0020U
65 #define REG_TMP4 0x0040U
66 #define REG_PTR1 0x0080U
67 #define REG_PTR2 0x0100U
68 #define REG_PTR3 0x0200U
69 #define REG_PTR4 0x0400U
70 #define REG_SREG_LO 0x0800U
71 #define REG_SREG_HI 0x1000U
72 #define REG_SP 0x2000U
73 #define REG_SAVE 0x4000U
74 #define REG_BANK 0x8000U
76 /* Combined register defines */
77 #define REG_SREG (REG_SREG_LO | REG_SREG_HI)
78 #define REG_AX (REG_A | REG_X)
79 #define REG_AY (REG_A | REG_Y)
80 #define REG_XY (REG_X | REG_Y)
81 #define REG_AXY (REG_AX | REG_Y)
82 #define REG_EAX (REG_AX | REG_SREG)
83 #define REG_EAXY (REG_EAX | REG_Y)
84 #define REG_ZP 0xFFF0U
85 #define REG_ALL 0xFFFFU
89 /*****************************************************************************/
91 /*****************************************************************************/
95 void GetFuncInfo (const char* Name, unsigned short* Use, unsigned short* Chg);
96 /* For the given function, lookup register information and store it into
97 * the given variables. If the function is unknown, assume it will use and
101 int IsZPName (const char* Name, unsigned short* RegInfo);
102 /* Return true if the given name is a zero page symbol. If the RegInfo
103 * pointer is not NULL, it is filled with the register info for the
104 * zero page location found.
107 unsigned GetRegInfo (struct CodeSeg* S, unsigned Index, unsigned Wanted);
108 /* Determine register usage information for the instructions starting at the
112 int RegAUsed (struct CodeSeg* S, unsigned Index);
113 /* Check if the value in A is used. */
115 int RegXUsed (struct CodeSeg* S, unsigned Index);
116 /* Check if the value in X is used. */
118 int RegYUsed (struct CodeSeg* S, unsigned Index);
119 /* Check if the value in Y is used. */
123 /* End of codeinfo.h */