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[cc65] / src / cc65 / codeinfo.h
1 /*****************************************************************************/
2 /*                                                                           */
3 /*                                codeinfo.h                                 */
4 /*                                                                           */
5 /*                  Additional information about 6502 code                   */
6 /*                                                                           */
7 /*                                                                           */
8 /*                                                                           */
9 /* (C) 2001      Ullrich von Bassewitz                                       */
10 /*               Wacholderweg 14                                             */
11 /*               D-70597 Stuttgart                                           */
12 /* EMail:        uz@cc65.org                                                 */
13 /*                                                                           */
14 /*                                                                           */
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.                                    */
18 /*                                                                           */
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:                            */
22 /*                                                                           */
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              */
30 /*    distribution.                                                          */
31 /*                                                                           */
32 /*****************************************************************************/
33
34
35
36 #ifndef CODEINFO_H
37 #define CODEINFO_H
38
39
40
41 /*****************************************************************************/
42 /*                                 Forwards                                  */
43 /*****************************************************************************/
44
45
46
47 struct CodeSeg;
48
49
50
51 /*****************************************************************************/
52 /*                                   Data                                    */
53 /*****************************************************************************/
54
55
56
57 /* Defines for registers. */
58 #define REG_NONE        0x0000U
59 #define REG_A           0x0001U
60 #define REG_X           0x0002U
61 #define REG_Y           0x0004U
62 #define REG_SREG_LO     0x0008U
63 #define REG_SREG_HI     0x0010U
64 #define REG_TMP1        0x0020U
65 #define REG_TMP2        0x0040U
66 #define REG_TMP3        0x0080U
67 #define REG_PTR1_LO     0x0100U
68 #define REG_PTR1_HI     0x0200U
69 #define REG_PTR2_LO     0x0400U
70 #define REG_PTR2_HI     0x0800U
71 #define REG_PTR3_LO     0x1000U
72 #define REG_PTR3_HI     0x2000U
73 #define REG_PTR4_LO     0x4000U
74 #define REG_PTR4_HI     0x8000U
75 #define REG_AX          (REG_A | REG_X)
76 #define REG_SREG        (REG_SREG_LO | REG_SREG_HI)
77 #define REG_EAX         (REG_AX | REG_SREG)
78 #define REG_XY          (REG_X | REG_Y)
79 #define REG_AXY         (REG_AX | REG_Y)
80 #define REG_EAXY        (REG_EAX | REG_Y)
81 #define REG_PTR1        (REG_PTR1_LO | REG_PTR1_HI)
82 #define REG_PTR2        (REG_PTR2_LO | REG_PTR2_HI)
83 #define REG_PTR3        (REG_PTR3_LO | REG_PTR3_HI)
84 #define REG_PTR4        (REG_PTR4_LO | REG_PTR4_HI)
85 #define REG_ALL         0xFFFFU
86
87
88 /*****************************************************************************/
89 /*                                   Code                                    */
90 /*****************************************************************************/
91
92
93
94 void GetFuncInfo (const char* Name, unsigned short* Use, unsigned short* Chg);
95 /* For the given function, lookup register information and store it into
96  * the given variables. If the function is unknown, assume it will use and
97  * load all registers.
98  */
99
100 int IsZPName (const char* Name, unsigned short* RegInfo);
101 /* Return true if the given name is a zero page symbol. If the RegInfo
102  * pointer is not NULL, it is filled with the register info for the
103  * zero page location found.
104  */
105
106 unsigned GetRegInfo (struct CodeSeg* S, unsigned Index);
107 /* Determine register usage information for the instructions starting at the
108  * given index.
109  */
110
111 int RegAUsed (struct CodeSeg* S, unsigned Index);
112 /* Check if the value in A is used. */
113
114 int RegXUsed (struct CodeSeg* S, unsigned Index);
115 /* Check if the value in X is used. */
116
117 int RegYUsed (struct CodeSeg* S, unsigned Index);
118 /* Check if the value in Y is used. */
119
120
121
122 /* End of codeinfo.h */
123 #endif
124
125
126
127