1 | /*****************************************************************************/ |
2 | /* */ |
3 | /* reginfo.h */ |
4 | /* */ |
5 | /* 6502 register tracking info */ |
6 | /* */ |
7 | /* */ |
8 | /* */ |
9 | /* (C) 2001-2003 Ullrich von Bassewitz */ |
10 | /* Roemerstrasse 52 */ |
11 | /* D-70794 Filderstadt */ |
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 REGINFO_H |
37 | #define REGINFO_H |
38 | |
39 | |
40 | |
41 | #include <stdio.h> /* ### */ |
42 | |
43 | /* common */ |
44 | #include "inline.h" |
45 | |
46 | |
47 | |
48 | /*****************************************************************************/ |
49 | /* Data */ |
50 | /*****************************************************************************/ |
51 | |
52 | |
53 | |
54 | /* Encoding for an unknown register value */ |
55 | #define UNKNOWN_REGVAL -1 |
56 | |
57 | /* Register contents */ |
58 | typedef struct RegContents RegContents; |
59 | struct RegContents { |
60 | short RegA; |
61 | short RegX; |
62 | short RegY; |
63 | short SRegLo; |
64 | short SRegHi; |
65 | short Ptr1Lo; |
66 | short Ptr1Hi; |
67 | short Tmp1; |
68 | }; |
69 | |
70 | /* Register change info */ |
71 | typedef struct RegInfo RegInfo; |
72 | struct RegInfo { |
73 | RegContents In; /* Incoming register values */ |
74 | RegContents Out; /* Outgoing register values */ |
75 | RegContents Out2; /* Alternative outgoing reg values for branches */ |
76 | }; |
77 | |
78 | |
79 | |
80 | /*****************************************************************************/ |
81 | /* Code */ |
82 | /*****************************************************************************/ |
83 | |
84 | |
85 | |
86 | void RC_Invalidate (RegContents* C); |
87 | /* Invalidate all registers */ |
88 | |
89 | void RC_InvalidateZP (RegContents* C); |
90 | /* Invalidate all ZP registers */ |
91 | |
92 | void RC_Dump (FILE* F, const RegContents* RC); |
93 | /* Dump the contents of the given RegContents struct */ |
94 | |
95 | #if defined(HAVE_INLINE) |
96 | INLINE int RegValIsKnown (short Val) |
97 | /* Return true if the register value is known */ |
98 | { |
99 | return (Val >= 0); |
100 | } |
101 | #else |
102 | # define RegValIsKnown(S) ((S) >= 0) |
103 | #endif |
104 | |
105 | #if defined(HAVE_INLINE) |
106 | INLINE int RegValIsUnknown (short Val) |
107 | /* Return true if the register value is not known */ |
108 | { |
109 | return (Val < 0); |
110 | } |
111 | #else |
112 | # define RegValIsUnknown(S) ((S) < 0) |
113 | #endif |
114 | |
115 | RegInfo* NewRegInfo (const RegContents* RC); |
116 | /* Allocate a new register info, initialize and return it. If RC is not |
117 | ** a NULL pointer, it is used to initialize both, the input and output |
118 | ** registers. If the pointer is NULL, all registers are set to unknown. |
119 | */ |
120 | |
121 | void FreeRegInfo (RegInfo* RI); |
122 | /* Free a RegInfo struct */ |
123 | |
124 | void DumpRegInfo (const char* Desc, const RegInfo* RI); |
125 | /* Dump the register info for debugging */ |
126 | |
127 | |
128 | |
129 | /* End of reginfo.h */ |
130 | |
131 | #endif |
132 | |