forked from snesrev/zelda3
-
Notifications
You must be signed in to change notification settings - Fork 0
/
tracing.cpp
208 lines (195 loc) · 18.2 KB
/
tracing.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <stdbool.h>
#include "tracing.h"
#include "snes/snes.h"
#include "snes/apu.h"
// name for each opcode, to be filled in with sprintf (length = 14 (13+\0))
static const char* opcodeNames[256] = {
"brk ", "ora ($%02x,x) ", "cop #$%02x ", "ora $%02x,s ", "tsb $%02x ", "ora $%02x ", "asl $%02x ", "ora [$%02x] ", "php ", "ora #$%04x ", "asl ", "phd ", "tsb $%04x ", "ora $%04x ", "asl $%04x ", "ora $%06x ",
"bpl $%04x ", "ora ($%02x),y ", "ora ($%02x) ", "ora ($%02x,s),y", "trb $%02x ", "ora $%02x,x ", "asl $%02x,x ", "ora [$%02x],y ", "clc ", "ora $%04x,y ", "inc ", "tcs ", "trb $%04x ", "ora $%04x,x ", "asl $%04x,x ", "ora $%06x,x",
"jsr $%04x ", "and ($%02x,x) ", "jsl $%06x ", "and $%02x,s ", "bit $%02x ", "and $%02x ", "rol $%02x ", "and [$%02x] ", "plp ", "and #$%04x ", "rol ", "pld ", "bit $%04x ", "and $%04x ", "rol $%04x ", "and $%06x ",
"bmi $%04x ", "and ($%02x),y ", "and ($%02x) ", "and ($%02x,s),y", "bit $%02x,x ", "and $%02x,x ", "rol $%02x,x ", "and [$%02x],y ", "sec ", "and $%04x,y ", "dec ", "tsc ", "bit $%04x,x ", "and $%04x,x ", "rol $%04x,x ", "and $%06x,x",
"rti ", "eor ($%02x,x) ", "wdm #$%02x ", "eor $%02x,s ", "mvp $%02x, $%02x ", "eor $%02x ", "lsr $%02x ", "eor [$%02x] ", "pha ", "eor #$%04x ", "lsr ", "phk ", "jmp $%04x ", "eor $%04x ", "lsr $%04x ", "eor $%06x ",
"bvc $%04x ", "eor ($%02x),y ", "eor ($%02x) ", "eor ($%02x,s),y", "mvn $%02x, $%02x ", "eor $%02x,x ", "lsr $%02x,x ", "eor [$%02x],y ", "cli ", "eor $%04x,y ", "phy ", "tcd ", "jml $%06x ", "eor $%04x,x ", "lsr $%04x,x ", "eor $%06x,x",
"rts ", "adc ($%02x,x) ", "per $%04x ", "adc $%02x,s ", "stz $%02x ", "adc $%02x ", "ror $%02x ", "adc [$%02x] ", "pla ", "adc #$%04x ", "ror ", "rtl ", "jmp ($%04x) ", "adc $%04x ", "ror $%04x ", "adc $%06x ",
"bvs $%04x ", "adc ($%02x),y ", "adc ($%02x) ", "adc ($%02x,s),y", "stz $%02x,x ", "adc $%02x,x ", "ror $%02x,x ", "adc [$%02x],y ", "sei ", "adc $%04x,y ", "ply ", "tdc ", "jmp ($%04x,x)", "adc $%04x,x ", "ror $%04x,x ", "adc $%06x,x",
"bra $%04x ", "sta ($%02x,x) ", "brl $%04x ", "sta $%02x,s ", "sty $%02x ", "sta $%02x ", "stx $%02x ", "sta [$%02x] ", "dey ", "bit #$%04x ", "txa ", "phb ", "sty $%04x ", "sta $%04x ", "stx $%04x ", "sta $%06x ",
"bcc $%04x ", "sta ($%02x),y ", "sta ($%02x) ", "sta ($%02x,s),y", "sty $%02x,x ", "sta $%02x,x ", "stx $%02x,y ", "sta [$%02x],y ", "tya ", "sta $%04x,y ", "txs ", "txy ", "stz $%04x ", "sta $%04x,x ", "stz $%04x,x ", "sta $%06x,x",
"ldy #$%04x ", "lda ($%02x,x) ", "ldx #$%04x ", "lda $%02x,s ", "ldy $%02x ", "lda $%02x ", "ldx $%02x ", "lda [$%02x] ", "tay ", "lda #$%04x ", "tax ", "plb ", "ldy $%04x ", "lda $%04x ", "ldx $%04x ", "lda $%06x ",
"bcs $%04x ", "lda ($%02x),y ", "lda ($%02x) ", "lda ($%02x,s),y", "ldy $%02x,x ", "lda $%02x,x ", "ldx $%02x,y ", "lda [$%02x],y ", "clv ", "lda $%04x,y ", "tsx ", "tyx ", "ldy $%04x,x ", "lda $%04x,x ", "ldx $%04x,y ", "lda $%06x,x",
"cpy #$%04x ", "cmp ($%02x,x) ", "rep #$%02x ", "cmp $%02x,s ", "cpy $%02x ", "cmp $%02x ", "dec $%02x ", "cmp [$%02x] ", "iny ", "cmp #$%04x ", "dex ", "wai ", "cpy $%04x ", "cmp $%04x ", "dec $%04x ", "cmp $%06x ",
"bne $%04x ", "cmp ($%02x),y ", "cmp ($%02x) ", "cmp ($%02x,s),y", "pei $%02x ", "cmp $%02x,x ", "dec $%02x,x ", "cmp [$%02x],y ", "cld ", "cmp $%04x,y ", "phx ", "stp ", "jml [$%04x] ", "cmp $%04x,x ", "dec $%04x,x ", "cmp $%06x,x",
"cpx #$%04x ", "sbc ($%02x,x) ", "sep #$%02x ", "sbc $%02x,s ", "cpx $%02x ", "sbc $%02x ", "inc $%02x ", "sbc [$%02x] ", "inx ", "sbc #$%04x ", "nop ", "xba ", "cpx $%04x ", "sbc $%04x ", "inc $%04x ", "sbc $%06x ",
"beq $%04x ", "sbc ($%02x),y ", "sbc ($%02x) ", "sbc ($%02x,s),y", "pea #$%04x ", "sbc $%02x,x ", "inc $%02x,x ", "sbc [$%02x],y ", "sed ", "sbc $%04x,y ", "plx ", "xce ", "jsr ($%04x,x)", "sbc $%04x,x ", "inc $%04x,x ", "sbc $%06x,x"
};
// for 8/16 bit immediates
// TODO: probably a better way to do this...
static const char* opcodeNamesSp[256] = {
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "ora #$%02x ", NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "and #$%02x ", NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "eor #$%02x ", NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "adc #$%02x ", NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "bit #$%02x ", NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
"ldy #$%02x ", NULL, "ldx #$%02x ", NULL, NULL, NULL, NULL, NULL, NULL, "lda #$%02x ", NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
"cpy #$%02x ", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "cmp #$%02x ", NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
"cpx #$%02x ", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, "sbc #$%02x ", NULL, NULL, NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL
};
// address types for each opcode
static const int opcodeType[256] = {
0, 1, 1, 1, 1, 1, 1, 1, 0, 4, 0, 0, 2, 2, 2, 3,
6, 1, 1, 1, 1, 1, 1, 1, 0, 2, 0, 0, 2, 2, 2, 3,
2, 1, 3, 1, 1, 1, 1, 1, 0, 4, 0, 0, 2, 2, 2, 3,
6, 1, 1, 1, 1, 1, 1, 1, 0, 2, 0, 0, 2, 2, 2, 3,
0, 1, 1, 1, 8, 1, 1, 1, 0, 4, 0, 0, 2, 2, 2, 3,
6, 1, 1, 1, 8, 1, 1, 1, 0, 2, 0, 0, 3, 2, 2, 3,
0, 1, 7, 1, 1, 1, 1, 1, 0, 4, 0, 0, 2, 2, 2, 3,
6, 1, 1, 1, 1, 1, 1, 1, 0, 2, 0, 0, 2, 2, 2, 3,
6, 1, 7, 1, 1, 1, 1, 1, 0, 4, 0, 0, 2, 2, 2, 3,
6, 1, 1, 1, 1, 1, 1, 1, 0, 2, 0, 0, 2, 2, 2, 3,
5, 1, 5, 1, 1, 1, 1, 1, 0, 4, 0, 0, 2, 2, 2, 3,
6, 1, 1, 1, 1, 1, 1, 1, 0, 2, 0, 0, 2, 2, 2, 3,
5, 1, 1, 1, 1, 1, 1, 1, 0, 4, 0, 0, 2, 2, 2, 3,
6, 1, 1, 1, 1, 1, 1, 1, 0, 2, 0, 0, 2, 2, 2, 3,
5, 1, 1, 1, 1, 1, 1, 1, 0, 4, 0, 0, 2, 2, 2, 3,
6, 1, 1, 1, 2, 1, 1, 1, 0, 2, 0, 0, 2, 2, 2, 3
};
// name for each opcode, for spc
static const char* opcodeNamesSpc[256] = {
"nop ", "tcall 0 ", "set1 $%02x.0 ", "bbs $%02x.0, $%04x ", "or a, $%02x ", "or a, $%04x ", "or a, [X] ", "or a, [$%02x+x] ", "or a, #$%02x ", "or $%02x, $%02x ", "or1 c, $%04x.%01x ", "asl $%02x ", "asl $%04x ", "push p ", "tset $%04x ", "brk ",
"bpl $%04x ", "tcall 1 ", "clr1 $%02x.0 ", "bbc $%02x.0, $%04x ", "or a, $%02x+x ", "or a, $%04x+x ", "or a, $%04x+y ", "or a, [$%02x]+y ", "or $%02x, #$%02x ", "or [X], [Y] ", "decw $%02x ", "asl $%02x+x ", "asl a ", "dec x ", "cmp x, $%04x ", "jmp [$%04x+x] ",
"clrp ", "tcall 2 ", "set1 $%02x.1 ", "bbs $%02x.1, $%04x ", "and a, $%02x ", "and a, $%04x ", "and a, [X] ", "and a, [$%02x+x] ", "and a, #$%02x ", "and $%02x, $%02x ", "or1 c, /$%04x.%01x ", "rol $%02x ", "rol $%04x ", "push a ", "cbne $%02x, $%04x ", "bra $%04x ",
"bmi $%04x ", "tcall 3 ", "clr1 $%02x.1 ", "bbc $%02x.1, $%04x ", "and a, $%02x+x ", "and a, $%04x+x ", "and a, $%04x+y ", "and a, [$%02x]+y ", "and $%02x, #$%02x ", "and [X], [Y] ", "incw $%02x ", "rol $%02x+x ", "rol a ", "inc x ", "cmp x, $%02x ", "call $%04x ",
"setp ", "tcall 4 ", "set1 $%02x.2 ", "bbs $%02x.2, $%04x ", "eor a, $%02x ", "eor a, $%04x ", "eor a, [X] ", "eor a, [$%02x+x] ", "eor a, #$%02x ", "eor $%02x, $%02x ", "and1 c, $%04x.%01x ", "lsr $%02x ", "lsr $%04x ", "push x ", "tclr $%04x ", "pcall $%02x ",
"bvc $%04x ", "tcall 5 ", "clr1 $%02x.2 ", "bbc $%02x.2, $%04x ", "eor a, $%02x+x ", "eor a, $%04x+x ", "eor a, $%04x+y ", "eor a, [$%02x]+y ", "eor $%02x, #$%02x ", "eor [X], [Y] ", "cmpw ya, $%02x ", "lsr $%02x+x ", "lsr a ", "mov x, a ", "cmp y, $%04x ", "jmp $%04x ",
"clrc ", "tcall 6 ", "set1 $%02x.3 ", "bbs $%02x.3, $%04x ", "cmp a, $%02x ", "cmp a, $%04x ", "cmp a, [X] ", "cmp a, [$%02x+x] ", "cmp a, #$%02x ", "cmp $%02x, $%02x ", "and1 c, /$%04x.%01x ", "ror $%02x ", "ror $%04x ", "push y ", "dbnz $%02x, $%04x ", "ret ",
"bvs $%04x ", "tcall 7 ", "clr1 $%02x.3 ", "bbc $%02x.3, $%04x ", "cmp a, $%02x+x ", "cmp a, $%04x+x ", "cmp a, $%04x+y ", "cmp a, [$%02x]+y ", "cmp $%02x, #$%02x ", "cmp [X], [Y] ", "addw ya, $%02x ", "ror $%02x+x ", "ror a ", "mov a, x ", "cmp y, $%02x ", "reti ",
"setc ", "tcall 8 ", "set1 $%02x.4 ", "bbs $%02x.4, $%04x ", "adc a, $%02x ", "adc a, $%04x ", "adc a, [X] ", "adc a, [$%02x+x] ", "adc a, #$%02x ", "adc $%02x, $%02x ", "eor1 c, $%04x.%01x ", "dec $%02x ", "dec $%04x ", "mov y, #$%02x ", "pop p ", "mov $%02x, #$%02x ",
"bcc $%04x ", "tcall 9 ", "clr1 $%02x.4 ", "bbc $%02x.4, $%04x ", "adc a, $%02x+x ", "adc a, $%04x+x ", "adc a, $%04x+y ", "adc a, [$%02x]+y ", "adc $%02x, #$%02x ", "adc [X], [Y] ", "subw ya, $%02x ", "dec $%02x+x ", "dec a ", "mov x, sp ", "div ya, x ", "xcn a ",
"ei ", "tcall 10 ", "set1 $%02x.5 ", "bbs $%02x.5, $%04x ", "sbc a, $%02x ", "sbc a, $%04x ", "sbc a, [X] ", "sbc a, [$%02x+x] ", "sbc a, #$%02x ", "sbc $%02x, $%02x ", "mov1 c, $%04x.%01x ", "inc $%02x ", "inc $%04x ", "cmp y, #$%02x ", "pop a ", "mov [x+], a ",
"bcs $%04x ", "tcall 11 ", "clr1 $%02x.5 ", "bbc $%02x.5, $%04x ", "sbc a, $%02x+x ", "sbc a, $%04x+x ", "sbc a, $%04x+y ", "sbc a, [$%02x]+y ", "sbc $%02x, #$%02x ", "sbc [X], [Y] ", "movw ya, $%02x ", "inc $%02x+x ", "inc a ", "mov sp, x ", "das a ", "mov a, [x+] ",
"di ", "tcall 12 ", "set1 $%02x.6 ", "bbs $%02x.6, $%04x ", "mov $%02x, a ", "mov $%04x, a ", "mov [X], a ", "mov [$%02x+x], a ", "cmp x, #$%02x ", "mov $%04x, x ", "mov1 $%04x.%01x, c ", "mov $%02x, y ", "mov $%04x, y ", "mov x, #$%02x ", "pop x ", "mul ya ",
"bne $%04x ", "tcall 13 ", "clr1 $%02x.6 ", "bbc $%02x.6, $%04x ", "mov $%02x+x, a ", "mov $%04x+x, a ", "mov $%04x+y, a ", "mov [$%02x]+y, a ", "mov $%02x, x ", "mov $%02x+y, x ", "movw $%02x, ya ", "mov $%02x+x, y ", "dec y ", "mov a, y ", "cbne $%02x+x, $%04x", "daa a ",
"clrv ", "tcall 14 ", "set1 $%02x.7 ", "bbs $%02x.7, $%04x ", "mov a, $%02x ", "mov a, $%04x ", "mov a, [X] ", "mov a, [$%02x+x] ", "mov a, #$%02x ", "mov x, $%04x ", "not1 $%04x.%01x ", "mov y, $%02x ", "mov y, $%04x ", "notc ", "pop y ", "sleep ",
"beq $%04x ", "tcall 15 ", "clr1 $%02x.7 ", "bbc $%02x.7, $%04x ", "mov a, $%02x+x ", "mov a, $%04x+x ", "mov a, $%04x+y ", "mov a, [$%02x]+y ", "mov x, $%02x ", "mov x, $%02x+y ", "mov $%02x, $%02x ", "mov y, $%02x+x ", "inc y ", "mov y, a ", "dbnz y, $%04x ", "stop "
};
// address types for each opcode, for spc
static const int opcodeTypeSpc[256] = {
0, 0, 1, 5, 1, 2, 0, 1, 1, 4, 6, 1, 2, 0, 2, 0,
3, 0, 1, 5, 1, 2, 2, 1, 4, 0, 1, 1, 0, 0, 2, 2,
0, 0, 1, 5, 1, 2, 0, 1, 1, 4, 6, 1, 2, 0, 5, 3,
3, 0, 1, 5, 1, 2, 2, 1, 4, 0, 1, 1, 0, 0, 1, 2,
0, 0, 1, 5, 1, 2, 0, 1, 1, 4, 6, 1, 2, 0, 2, 1,
3, 0, 1, 5, 1, 2, 2, 1, 4, 0, 1, 1, 0, 0, 2, 2,
0, 0, 1, 5, 1, 2, 0, 1, 1, 4, 6, 1, 2, 0, 5, 0,
3, 0, 1, 5, 1, 2, 2, 1, 4, 0, 1, 1, 0, 0, 1, 0,
0, 0, 1, 5, 1, 2, 0, 1, 1, 4, 6, 1, 2, 1, 0, 4,
3, 0, 1, 5, 1, 2, 2, 1, 4, 0, 1, 1, 0, 0, 0, 0,
0, 0, 1, 5, 1, 2, 0, 1, 1, 4, 6, 1, 2, 1, 0, 0,
3, 0, 1, 5, 1, 2, 2, 1, 4, 0, 1, 1, 0, 0, 0, 0,
0, 0, 1, 5, 1, 2, 0, 1, 1, 2, 6, 1, 2, 1, 0, 0,
3, 0, 1, 5, 1, 2, 2, 1, 1, 1, 1, 1, 0, 0, 5, 0,
0, 0, 1, 5, 1, 2, 0, 1, 1, 2, 6, 1, 2, 0, 0, 0,
3, 0, 1, 5, 1, 2, 2, 1, 1, 1, 4, 1, 0, 0, 3, 0
};
static void getDisassemblyCpu(Snes* snes, char* line);
static void getDisassemblySpc(Apu *apu, char* line);
void getProcessorStateCpu(Snes* snes, char* line) {
// 0 1 2 3 4 5 6 7 8
// 12345678901234567890123456789012345678901234567890123456789012345678901234567890
// CPU 12:3456 1234567890123 A:1234 X:1234 Y:1234 SP:1234 DP:1234 DP:12 e nvmxdizc
char disLine[14] = " ";
getDisassemblyCpu(snes, disLine);
sprintf(
line, "CPU %02x:%04x %s A:%04x X:%04x Y:%04x SP:%04x DP:%04x DB:%02x %c %c%c%c%c%c%c%c%c",
snes->cpu->k, snes->cpu->pc, disLine, snes->cpu->a, snes->cpu->x, snes->cpu->y,
snes->cpu->sp, snes->cpu->dp, snes->cpu->db, snes->cpu->e ? 'E' : 'e',
snes->cpu->n ? 'N' : 'n', snes->cpu->v ? 'V' : 'v', snes->cpu->mf ? 'M' : 'm', snes->cpu->xf ? 'X' : 'x',
snes->cpu->d ? 'D' : 'd', snes->cpu->i ? 'I' : 'i', snes->cpu->z ? 'Z' : 'z', snes->cpu->c ? 'C' : 'c'
);
}
void getProcessorStateSpc(Apu *apu, char* line) {
// 0 1 2 3 4 5 6 7 8
// 12345678901234567890123456789012345678901234567890123456789012345678901234567890
// SPC 3456 12345678901234567 A:12 X:12 Y:12 SP:12 nvpbhizc
char disLine[18] = " ";
getDisassemblySpc(apu, disLine);
sprintf(
line, "SPC %04x %s A:%02x X:%02x Y:%02x SP:%02x %c%c%c%c%c%c%c%c",
apu->spc->pc, disLine, apu->spc->a, apu->spc->x, apu->spc->y, apu->spc->sp,
apu->spc->n ? 'N' : 'n', apu->spc->v ? 'V' : 'v', apu->spc->p ? 'P' : 'p', apu->spc->b ? 'B' : 'b',
apu->spc->h ? 'H' : 'h', apu->spc->i ? 'I' : 'i', apu->spc->z ? 'Z' : 'z', apu->spc->c ? 'C' : 'c'
);
}
static void getDisassemblyCpu(Snes* snes, char* line) {
uint32_t adr = snes->cpu->pc | (snes->cpu->k << 16);
// read 4 bytes
// TODO: this can have side effects, implement and use peaking
uint8_t opcode = snes_read(snes, adr);
uint8_t byte = snes_read(snes, (adr + 1) & 0xffffff);
uint8_t byte2 = snes_read(snes, (adr + 2) & 0xffffff);
uint16_t word = (byte2 << 8) | byte;
uint32_t longv = (snes_read(snes, (adr + 3) & 0xffffff) << 16) | word;
uint16_t rel = snes->cpu->pc + 2 + (int8_t) byte;
uint16_t rell = snes->cpu->pc + 3 + (int16_t) word;
// switch on type
switch(opcodeType[opcode]) {
case 0: sprintf(line, "%s", opcodeNames[opcode]); break;
case 1: sprintf(line, opcodeNames[opcode], byte); break;
case 2: sprintf(line, opcodeNames[opcode], word); break;
case 3: sprintf(line, opcodeNames[opcode], longv); break;
case 4: {
if(snes->cpu->mf) {
sprintf(line, opcodeNamesSp[opcode], byte);
} else {
sprintf(line, opcodeNames[opcode], word);
}
break;
}
case 5: {
if(snes->cpu->xf) {
sprintf(line, opcodeNamesSp[opcode], byte);
} else {
sprintf(line, opcodeNames[opcode], word);
}
break;
}
case 6: sprintf(line, opcodeNames[opcode], rel); break;
case 7: sprintf(line, opcodeNames[opcode], rell); break;
case 8: sprintf(line, opcodeNames[opcode], byte2, byte); break;
}
}
void getDisassemblySpc(Apu *apu, char* line) {
uint16_t adr = apu->spc->pc;
// read 3 bytes
// TODO: this can have side effects, implement and use peaking
uint8_t opcode = apu_cpuRead(apu, adr);
uint8_t byte = apu_cpuRead(apu, (adr + 1) & 0xffff);
uint8_t byte2 = apu_cpuRead(apu, (adr + 2) & 0xffff);
uint16_t word = (byte2 << 8) | byte;
uint16_t rel = apu->spc->pc + 2 + (int8_t) byte;
uint16_t rel2 = apu->spc->pc + 2 + (int8_t) byte2;
uint16_t wordb = word & 0x1fff;
uint8_t bit = word >> 13;
// switch on type
switch(opcodeTypeSpc[opcode]) {
case 0: sprintf(line, "%s", opcodeNamesSpc[opcode]); break;
case 1: sprintf(line, opcodeNamesSpc[opcode], byte); break;
case 2: sprintf(line, opcodeNamesSpc[opcode], word); break;
case 3: sprintf(line, opcodeNamesSpc[opcode], rel); break;
case 4: sprintf(line, opcodeNamesSpc[opcode], byte2, byte); break;
case 5: sprintf(line, opcodeNamesSpc[opcode], byte, rel2); break;
case 6: sprintf(line, opcodeNamesSpc[opcode], wordb, bit); break;
}
}