asar coverage - build #268


src/asar/
File: src/asar/arch-65816.cpp
Date: 2025-03-01 20:34:29
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1 #include "asar.h"
2 #include "assembleblock.h"
3 #include "asar_math.h"
4 #include <cassert>
5 #include <initializer_list>
6
7 // A bit of terminology i just invented:
8 // "mnemonic" refers to the name of an instruction, e.g. LDA or JMP.
9 // "address mode" is the form of an instruction's argument, with a specific
10 // width, e.g. [$12] or $1234,x. determining the exact mode requires knowing
11 // the width of the instruction.
12 // "address kind" is like an address mode, but without a specific width. it
13 // is determined purely from the syntax of the argument.
14 // "modifier" is the length suffix (the .w in LDA.w), but it's called modifier
15 // because it's a bit more general (also sets branch targeting mode).
16
17 enum class addr_kind {
18 abs, // $00
19 x, // $00,x
20 y, // $00,y
21 ind, // ($00) "indirect"
22 lind, // [$00] "long indirect"
23 xind, // ($00,x)
24 indy, // ($00),y
25 lindy, // [$00],y
26 s, // $00,s
27 sy, // ($00,s),y
28 imp, // implied (no argument)
29 a, // 'A' as argument
30 imm, // #$00 "immediate"
31 mvn, // special for mvn/mvp
32 num_addr_kinds,
33 };
34 // used as bitmasks
35 static_assert((int)addr_kind::num_addr_kinds < 32);
36
37 // various flags that affect parsing of specific instructions.
38 // these are stored per mnemonic+kind, which is required for some of them, and
39 // the rest usually have only 1 kind/width allowed anyways so it doesn't hurt.
40 // this is not an `enum class` because those are annoying to use as bitmasks.
41 enum mnemonic_flag {
42 // for brk,cop,wdm: implied mode = immediate with arg 0
43 flag_imm_implied_0 = 1 << 0,
44 // imm should be size 1 or 2 depending on accum size.
45 // currently all this does is allow both 1- and 2-wide immediates,
46 // but could be useful for tracking rep/sep state in asar in the future.
47 flag_imm_width_a = 1 << 1,
48 // imm should be size 1 or 2 depending on x/y size
49 flag_imm_width_xy = 1 << 2,
50 // branch opcodes, have weird target computation rules
51 flag_branch = 1 << 3,
52 // for jmp/jsr, sets optimizeforbank to K
53 flag_bank_k = 1 << 4,
54 // sets optimizeforbank to 0 (as some jumps always read from bank 0)
55 flag_bank_0 = 1 << 5,
56 // additionally allow `imm` addressing which is interpreted as repetition
57 flag_implied_rep = 1 << 6,
58 };
59
60 struct mnem_kind_info {
61 uint8_t allowed_widths; // bitmask, low 4 bits represent widths 0 to 3
62 uint8_t opcode_for_width[4];
63 uint32_t flags; // combination of `mnemonic_flag`s
64 };
65 struct mnemonicinfo {
66 // kind of a waste to have this array which most of the time only has 1 entry filled
67 mnem_kind_info types[(int)addr_kind::num_addr_kinds];
68 uint32_t allowed_kinds_mask;
69 };
70
71 struct mnemonic_lookup_t {
72 std::unordered_map<string, mnemonicinfo> the_map;
73
74 // helper struct for the initializer_list
75 struct opcode {
76 uint8_t byte;
77 const char *mnem;
78 addr_kind akind;
79 int width; // width of argument, not entire insn
80 uint32_t flags;
81 1799 opcode(uint8_t byte_, const char *mnem_, addr_kind akind_, int width_, uint32_t flags_ = 0)
82 1799 : byte(byte_), mnem(mnem_), akind(akind_), width(width_),
83 1799 flags(flags_) {}
84 };
85
86 2023 static void add_one(mnemonicinfo& mnem, addr_kind kind, int width, uint8_t byte, uint32_t flags) {
87
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2023 mnem.allowed_kinds_mask |= 1 << (int)kind;
88 2023 auto& this_part = mnem.types[(int)kind];
89
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2023 assert((this_part.allowed_widths & (1 << width)) == 0);
90
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2023 this_part.allowed_widths |= 1 << width;
91 2023 this_part.opcode_for_width[width] = byte;
92 2023 this_part.flags |= flags;
93 2023 }
94
95 7 mnemonic_lookup_t(std::initializer_list<opcode> l) {
96
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1806 for(const auto& x : l) {
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1799 auto& this_mnem = the_map[x.mnem];
98
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1799 add_one(this_mnem, x.akind, x.width, x.byte, x.flags);
99
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1799 if(x.flags & flag_imm_implied_0) {
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21 assert(x.akind == addr_kind::imm && x.width == 1);
101
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21 add_one(this_mnem, addr_kind::imp, 0, x.byte, x.flags);
102 }
103
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1799 if(x.akind == addr_kind::a) {
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42 add_one(this_mnem, addr_kind::imp, 0, x.byte, x.flags);
105 }
106
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1799 if(x.flags & flag_implied_rep) {
107
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77 add_one(this_mnem, addr_kind::imm, 0, x.byte, x.flags);
108 }
109
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1799 if(x.flags & (flag_imm_width_a | flag_imm_width_xy)) {
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84 assert(x.akind == addr_kind::imm && x.width == 1);
111
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84 add_one(this_mnem, x.akind, 2, x.byte, x.flags);
112 }
113 }
114 7 }
115 };
116
117 static mnemonic_lookup_t mnemonic_lookup = {
118 { 0x00, "brk", addr_kind::imm , 1, flag_imm_implied_0 },
119 { 0x01, "ora", addr_kind::xind , 1 },
120 { 0x02, "cop", addr_kind::imm , 1, flag_imm_implied_0 },
121 { 0x03, "ora", addr_kind::s , 1 },
122 { 0x04, "tsb", addr_kind::abs , 1 },
123 { 0x05, "ora", addr_kind::abs , 1 },
124 { 0x06, "asl", addr_kind::abs , 1 },
125 { 0x07, "ora", addr_kind::lind , 1 },
126 { 0x08, "php", addr_kind::imp , 0 },
127 { 0x09, "ora", addr_kind::imm , 1, flag_imm_width_a },
128 { 0x0a, "asl", addr_kind::a , 0, flag_implied_rep },
129 { 0x0b, "phd", addr_kind::imp , 0 },
130 { 0x0c, "tsb", addr_kind::abs , 2 },
131 { 0x0d, "ora", addr_kind::abs , 2 },
132 { 0x0e, "asl", addr_kind::abs , 2 },
133 { 0x0f, "ora", addr_kind::abs , 3 },
134 { 0x10, "bpl", addr_kind::abs , 1, flag_branch },
135 { 0x11, "ora", addr_kind::indy , 1 },
136 { 0x12, "ora", addr_kind::ind , 1 },
137 { 0x13, "ora", addr_kind::sy , 1 },
138 { 0x14, "trb", addr_kind::abs , 1 },
139 { 0x15, "ora", addr_kind::x , 1 },
140 { 0x16, "asl", addr_kind::x , 1 },
141 { 0x17, "ora", addr_kind::lindy , 1 },
142 { 0x18, "clc", addr_kind::imp , 0 },
143 { 0x19, "ora", addr_kind::y , 2 },
144 { 0x1a, "inc", addr_kind::a , 0, flag_implied_rep },
145 { 0x1b, "tcs", addr_kind::imp , 0 },
146 { 0x1c, "trb", addr_kind::abs , 2 },
147 { 0x1d, "ora", addr_kind::x , 2 },
148 { 0x1e, "asl", addr_kind::x , 2 },
149 { 0x1f, "ora", addr_kind::x , 3 },
150 { 0x20, "jsr", addr_kind::abs , 2, flag_bank_k },
151 { 0x21, "and", addr_kind::xind , 1 },
152 { 0x22, "jsl", addr_kind::abs , 3 },
153 { 0x23, "and", addr_kind::s , 1 },
154 { 0x24, "bit", addr_kind::abs , 1 },
155 { 0x25, "and", addr_kind::abs , 1 },
156 { 0x26, "rol", addr_kind::abs , 1 },
157 { 0x27, "and", addr_kind::lind , 1 },
158 { 0x28, "plp", addr_kind::imp , 0 },
159 { 0x29, "and", addr_kind::imm , 1, flag_imm_width_a },
160 { 0x2a, "rol", addr_kind::a , 0, flag_implied_rep },
161 { 0x2b, "pld", addr_kind::imp , 0 },
162 { 0x2c, "bit", addr_kind::abs , 2 },
163 { 0x2d, "and", addr_kind::abs , 2 },
164 { 0x2e, "rol", addr_kind::abs , 2 },
165 { 0x2f, "and", addr_kind::abs , 3 },
166 { 0x30, "bmi", addr_kind::abs , 1, flag_branch },
167 { 0x31, "and", addr_kind::indy , 1 },
168 { 0x32, "and", addr_kind::ind , 1 },
169 { 0x33, "and", addr_kind::sy , 1 },
170 { 0x34, "bit", addr_kind::x , 1 },
171 { 0x35, "and", addr_kind::x , 1 },
172 { 0x36, "rol", addr_kind::x , 1 },
173 { 0x37, "and", addr_kind::lindy , 1 },
174 { 0x38, "sec", addr_kind::imp , 0 },
175 { 0x39, "and", addr_kind::y , 2 },
176 { 0x3a, "dec", addr_kind::a , 0, flag_implied_rep },
177 { 0x3b, "tsc", addr_kind::imp , 0 },
178 { 0x3c, "bit", addr_kind::x , 2 },
179 { 0x3d, "and", addr_kind::x , 2 },
180 { 0x3e, "rol", addr_kind::x , 2 },
181 { 0x3f, "and", addr_kind::x , 3 },
182 { 0x40, "rti", addr_kind::imp , 0 },
183 { 0x41, "eor", addr_kind::xind , 1 },
184 { 0x42, "wdm", addr_kind::imm , 1, flag_imm_implied_0 },
185 { 0x43, "eor", addr_kind::s , 1 },
186 { 0x44, "mvp", addr_kind::mvn , 2 },
187 { 0x45, "eor", addr_kind::abs , 1 },
188 { 0x46, "lsr", addr_kind::abs , 1 },
189 { 0x47, "eor", addr_kind::lind , 1 },
190 { 0x48, "pha", addr_kind::imp , 0 },
191 { 0x49, "eor", addr_kind::imm , 1, flag_imm_width_a },
192 { 0x4a, "lsr", addr_kind::a , 0, flag_implied_rep },
193 { 0x4b, "phk", addr_kind::imp , 0 },
194 { 0x4c, "jmp", addr_kind::abs , 2, flag_bank_k },
195 { 0x4d, "eor", addr_kind::abs , 2 },
196 { 0x4e, "lsr", addr_kind::abs , 2 },
197 { 0x4f, "eor", addr_kind::abs , 3 },
198 { 0x50, "bvc", addr_kind::abs , 1, flag_branch },
199 { 0x51, "eor", addr_kind::indy , 1 },
200 { 0x52, "eor", addr_kind::ind , 1 },
201 { 0x53, "eor", addr_kind::sy , 1 },
202 { 0x54, "mvn", addr_kind::mvn , 2 },
203 { 0x55, "eor", addr_kind::x , 1 },
204 { 0x56, "lsr", addr_kind::x , 1 },
205 { 0x57, "eor", addr_kind::lindy , 1 },
206 { 0x58, "cli", addr_kind::imp , 0 },
207 { 0x59, "eor", addr_kind::y , 2 },
208 { 0x5a, "phy", addr_kind::imp , 0 },
209 { 0x5b, "tcd", addr_kind::imp , 0 },
210 { 0x5c, "jml", addr_kind::abs , 3 },
211 { 0x5d, "eor", addr_kind::x , 2 },
212 { 0x5e, "lsr", addr_kind::x , 2 },
213 { 0x5f, "eor", addr_kind::x , 3 },
214 { 0x60, "rts", addr_kind::imp , 0 },
215 { 0x61, "adc", addr_kind::xind , 1 },
216 { 0x62, "per", addr_kind::abs , 2, flag_branch },
217 { 0x63, "adc", addr_kind::s , 1 },
218 { 0x64, "stz", addr_kind::abs , 1 },
219 { 0x65, "adc", addr_kind::abs , 1 },
220 { 0x66, "ror", addr_kind::abs , 1 },
221 { 0x67, "adc", addr_kind::lind , 1 },
222 { 0x68, "pla", addr_kind::imp , 0 },
223 { 0x69, "adc", addr_kind::imm , 1, flag_imm_width_a },
224 { 0x6a, "ror", addr_kind::a , 0, flag_implied_rep },
225 { 0x6b, "rtl", addr_kind::imp , 0 },
226 { 0x6c, "jmp", addr_kind::ind , 2, flag_bank_0 },
227 { 0x6d, "adc", addr_kind::abs , 2 },
228 { 0x6e, "ror", addr_kind::abs , 2 },
229 { 0x6f, "adc", addr_kind::abs , 3 },
230 { 0x70, "bvs", addr_kind::abs , 1, flag_branch },
231 { 0x71, "adc", addr_kind::indy , 1 },
232 { 0x72, "adc", addr_kind::ind , 1 },
233 { 0x73, "adc", addr_kind::sy , 1 },
234 { 0x74, "stz", addr_kind::x , 1 },
235 { 0x75, "adc", addr_kind::x , 1 },
236 { 0x76, "ror", addr_kind::x , 1 },
237 { 0x77, "adc", addr_kind::lindy , 1 },
238 { 0x78, "sei", addr_kind::imp , 0 },
239 { 0x79, "adc", addr_kind::y , 2 },
240 { 0x7a, "ply", addr_kind::imp , 0 },
241 { 0x7b, "tdc", addr_kind::imp , 0 },
242 { 0x7c, "jmp", addr_kind::xind , 2, flag_bank_k },
243 { 0x7d, "adc", addr_kind::x , 2 },
244 { 0x7e, "ror", addr_kind::x , 2 },
245 { 0x7f, "adc", addr_kind::x , 3 },
246 { 0x80, "bra", addr_kind::abs , 1, flag_branch },
247 { 0x81, "sta", addr_kind::xind , 1 },
248 { 0x82, "brl", addr_kind::abs , 2, flag_branch },
249 { 0x83, "sta", addr_kind::s , 1 },
250 { 0x84, "sty", addr_kind::abs , 1 },
251 { 0x85, "sta", addr_kind::abs , 1 },
252 { 0x86, "stx", addr_kind::abs , 1 },
253 { 0x87, "sta", addr_kind::lind , 1 },
254 { 0x88, "dey", addr_kind::imp , 0, flag_implied_rep },
255 { 0x89, "bit", addr_kind::imm , 1, flag_imm_width_a },
256 { 0x8a, "txa", addr_kind::imp , 0 },
257 { 0x8b, "phb", addr_kind::imp , 0 },
258 { 0x8c, "sty", addr_kind::abs , 2 },
259 { 0x8d, "sta", addr_kind::abs , 2 },
260 { 0x8e, "stx", addr_kind::abs , 2 },
261 { 0x8f, "sta", addr_kind::abs , 3 },
262 { 0x90, "bcc", addr_kind::abs , 1, flag_branch },
263 { 0x91, "sta", addr_kind::indy , 1 },
264 { 0x92, "sta", addr_kind::ind , 1 },
265 { 0x93, "sta", addr_kind::sy , 1 },
266 { 0x94, "sty", addr_kind::x , 1 },
267 { 0x95, "sta", addr_kind::x , 1 },
268 { 0x96, "stx", addr_kind::y , 1 },
269 { 0x97, "sta", addr_kind::lindy , 1 },
270 { 0x98, "tya", addr_kind::imp , 0 },
271 { 0x99, "sta", addr_kind::y , 2 },
272 { 0x9a, "txs", addr_kind::imp , 0 },
273 { 0x9b, "txy", addr_kind::imp , 0 },
274 { 0x9c, "stz", addr_kind::abs , 2 },
275 { 0x9d, "sta", addr_kind::x , 2 },
276 { 0x9e, "stz", addr_kind::x , 2 },
277 { 0x9f, "sta", addr_kind::x , 3 },
278 { 0xa0, "ldy", addr_kind::imm , 1, flag_imm_width_xy },
279 { 0xa1, "lda", addr_kind::xind , 1 },
280 { 0xa2, "ldx", addr_kind::imm , 1, flag_imm_width_xy },
281 { 0xa3, "lda", addr_kind::s , 1 },
282 { 0xa4, "ldy", addr_kind::abs , 1 },
283 { 0xa5, "lda", addr_kind::abs , 1 },
284 { 0xa6, "ldx", addr_kind::abs , 1 },
285 { 0xa7, "lda", addr_kind::lind , 1 },
286 { 0xa8, "tay", addr_kind::imp , 0 },
287 { 0xa9, "lda", addr_kind::imm , 1, flag_imm_width_a },
288 { 0xaa, "tax", addr_kind::imp , 0 },
289 { 0xab, "plb", addr_kind::imp , 0 },
290 { 0xac, "ldy", addr_kind::abs , 2 },
291 { 0xad, "lda", addr_kind::abs , 2 },
292 { 0xae, "ldx", addr_kind::abs , 2 },
293 { 0xaf, "lda", addr_kind::abs , 3 },
294 { 0xb0, "bcs", addr_kind::abs , 1, flag_branch },
295 { 0xb1, "lda", addr_kind::indy , 1 },
296 { 0xb2, "lda", addr_kind::ind , 1 },
297 { 0xb3, "lda", addr_kind::sy , 1 },
298 { 0xb4, "ldy", addr_kind::x , 1 },
299 { 0xb5, "lda", addr_kind::x , 1 },
300 { 0xb6, "ldx", addr_kind::y , 1 },
301 { 0xb7, "lda", addr_kind::lindy , 1 },
302 { 0xb8, "clv", addr_kind::imp , 0 },
303 { 0xb9, "lda", addr_kind::y , 2 },
304 { 0xba, "tsx", addr_kind::imp , 0 },
305 { 0xbb, "tyx", addr_kind::imp , 0 },
306 { 0xbc, "ldy", addr_kind::x , 2 },
307 { 0xbd, "lda", addr_kind::x , 2 },
308 { 0xbe, "ldx", addr_kind::y , 2 },
309 { 0xbf, "lda", addr_kind::x , 3 },
310 { 0xc0, "cpy", addr_kind::imm , 1, flag_imm_width_xy },
311 { 0xc1, "cmp", addr_kind::xind , 1 },
312 { 0xc2, "rep", addr_kind::imm , 1 },
313 { 0xc3, "cmp", addr_kind::s , 1 },
314 { 0xc4, "cpy", addr_kind::abs , 1 },
315 { 0xc5, "cmp", addr_kind::abs , 1 },
316 { 0xc6, "dec", addr_kind::abs , 1 },
317 { 0xc7, "cmp", addr_kind::lind , 1 },
318 { 0xc8, "iny", addr_kind::imp , 0, flag_implied_rep },
319 { 0xc9, "cmp", addr_kind::imm , 1, flag_imm_width_a },
320 { 0xca, "dex", addr_kind::imp , 0, flag_implied_rep },
321 { 0xcb, "wai", addr_kind::imp , 0 },
322 { 0xcc, "cpy", addr_kind::abs , 2 },
323 { 0xcd, "cmp", addr_kind::abs , 2 },
324 { 0xce, "dec", addr_kind::abs , 2 },
325 { 0xcf, "cmp", addr_kind::abs , 3 },
326 { 0xd0, "bne", addr_kind::abs , 1, flag_branch },
327 { 0xd1, "cmp", addr_kind::indy , 1 },
328 { 0xd2, "cmp", addr_kind::ind , 1 },
329 { 0xd3, "cmp", addr_kind::sy , 1 },
330 { 0xd4, "pei", addr_kind::ind , 1 },
331 { 0xd5, "cmp", addr_kind::x , 1 },
332 { 0xd6, "dec", addr_kind::x , 1 },
333 { 0xd7, "cmp", addr_kind::lindy , 1 },
334 { 0xd8, "cld", addr_kind::imp , 0 },
335 { 0xd9, "cmp", addr_kind::y , 2 },
336 { 0xda, "phx", addr_kind::imp , 0 },
337 { 0xdb, "stp", addr_kind::imp , 0 },
338 { 0xdc, "jmp", addr_kind::lind , 2, flag_bank_0 },
339 { 0xdc, "jml", addr_kind::lind , 2, flag_bank_0 },
340 { 0xdd, "cmp", addr_kind::x , 2 },
341 { 0xde, "dec", addr_kind::x , 2 },
342 { 0xdf, "cmp", addr_kind::x , 3 },
343 { 0xe0, "cpx", addr_kind::imm , 1, flag_imm_width_xy },
344 { 0xe1, "sbc", addr_kind::xind , 1 },
345 { 0xe2, "sep", addr_kind::imm , 1 },
346 { 0xe3, "sbc", addr_kind::s , 1 },
347 { 0xe4, "cpx", addr_kind::abs , 1 },
348 { 0xe5, "sbc", addr_kind::abs , 1 },
349 { 0xe6, "inc", addr_kind::abs , 1 },
350 { 0xe7, "sbc", addr_kind::lind , 1 },
351 { 0xe8, "inx", addr_kind::imp , 0, flag_implied_rep },
352 { 0xe9, "sbc", addr_kind::imm , 1, flag_imm_width_a },
353 { 0xea, "nop", addr_kind::imp , 0, flag_implied_rep },
354 { 0xeb, "xba", addr_kind::imp , 0 },
355 { 0xec, "cpx", addr_kind::abs , 2 },
356 { 0xed, "sbc", addr_kind::abs , 2 },
357 { 0xee, "inc", addr_kind::abs , 2 },
358 { 0xef, "sbc", addr_kind::abs , 3 },
359 { 0xf0, "beq", addr_kind::abs , 1, flag_branch },
360 { 0xf1, "sbc", addr_kind::indy , 1 },
361 { 0xf2, "sbc", addr_kind::ind , 1 },
362 { 0xf3, "sbc", addr_kind::sy , 1 },
363 { 0xf4, "pea", addr_kind::abs , 2 },
364 { 0xf5, "sbc", addr_kind::x , 1 },
365 { 0xf6, "inc", addr_kind::x , 1 },
366 { 0xf7, "sbc", addr_kind::lindy , 1 },
367 { 0xf8, "sed", addr_kind::imp , 0 },
368 { 0xf9, "sbc", addr_kind::y , 2 },
369 { 0xfa, "plx", addr_kind::imp , 0 },
370 { 0xfb, "xce", addr_kind::imp , 0 },
371 { 0xfc, "jsr", addr_kind::xind , 2, flag_bank_k },
372 { 0xfd, "sbc", addr_kind::x , 2 },
373 { 0xfe, "inc", addr_kind::x , 2 },
374 { 0xff, "sbc", addr_kind::x , 3 },
375 };
376
377 struct parse_result {
378 addr_kind kind;
379 string arg;
380 };
381
382 // checks for matching characters at the start of haystack, ignoring spaces.
383 // returns index into haystack right after the match
384 template<char... chars>
385 22302 static int64_t startmatch(const string& haystack) {
386 static const char needle[] = {chars...};
387 22302 size_t haystack_i = 0;
388
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24114 for(size_t i = 0; i < sizeof...(chars); i++) {
389
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22302 while(haystack[haystack_i] == ' ') haystack_i++;
390
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22302 if(needle[i] != to_lower(haystack[haystack_i++])) return -1;
391 }
392 1812 return haystack_i;
393 }
394
395 // checks for matching characters at the end of haystack, ignoring spaces.
396 // returns index into haystack right before the match
397 template<char... chars>
398 18798 static int64_t endmatch(const string& haystack) {
399 static const char needle[] = {chars...};
400 18798 int64_t haystack_i = haystack.length()-1;
401
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23538 for(int64_t i = sizeof...(chars)-1; i >= 0; i--) {
402
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21558 while(haystack_i >= 0 && haystack[haystack_i] == ' ') haystack_i--;
403
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21558 if(haystack_i < 0 || needle[i] != to_lower(haystack[haystack_i--])) return -1;
404 }
405 1980 return haystack_i+1;
406 }
407
408 /*
409 * Parses the address kind from an argument, given a list of allowed address kinds.
410 * Throws "invalid address mode" if the argument does not match any kinds.
411 */
412 // i still don't like this function...
413 4173 static parse_result parse_addr_kind(const string& arg, uint32_t allowed_kinds_mask) {
414 4173 int64_t start_i = 0, end_i = arg.length();
415 // If this addressing kind is allowed, return it, along with a trimmed version of the string.
416 #define RETURN_IF_ALLOWED(kind) \
417 if (allowed_kinds_mask & 1<<(uint32_t)addr_kind::kind) { \
418 string out(arg.data() + start_i, end_i - start_i); \
419 return parse_result{addr_kind::kind, out}; \
420 }
421
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4173 if((start_i = startmatch<'#'>(arg)) >= 0) {
422
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1152 RETURN_IF_ALLOWED(imm);
423 asar_throw_error(1, error_type_block, error_id_bad_addr_mode);
424 }
425
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3597 if((start_i = startmatch<'('>(arg)) >= 0) {
426 // TODO check if the end of this paren is where it should be
427
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216 if((end_i = endmatch<',', 's', ')', ',', 'y'>(arg)) >= 0) {
428
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96 RETURN_IF_ALLOWED(sy);
429 asar_throw_error(1, error_type_block, error_id_bad_addr_mode);
430 }
431
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168 if((end_i = endmatch<')', ',', 'y'>(arg)) >= 0) {
432
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96 RETURN_IF_ALLOWED(indy);
433 asar_throw_error(1, error_type_block, error_id_bad_addr_mode);
434 }
435
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120 if((end_i = endmatch<',', 'x', ')'>(arg)) >= 0) {
436
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120 RETURN_IF_ALLOWED(xind);
437 asar_throw_error(1, error_type_block, error_id_bad_addr_mode);
438 }
439
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60 if((end_i = endmatch<')'>(arg)) >= 0) {
440
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120 RETURN_IF_ALLOWED(ind);
441 asar_throw_warning(1, warning_id_assuming_address_mode, "($00)", "$00", " (if this was intentional, add a +0 after the parentheses.)");
442 }
443 }
444
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3381 if((start_i = startmatch<'['>(arg)) >= 0) {
445
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114 if((end_i = endmatch<']', ',', 'y'>(arg)) >= 0) {
446
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96 RETURN_IF_ALLOWED(lindy);
447 asar_throw_error(1, error_type_block, error_id_bad_addr_mode);
448 }
449
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66 if((end_i = endmatch<']'>(arg)) >= 0) {
450
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132 RETURN_IF_ALLOWED(lind);
451 asar_throw_error(1, error_type_block, error_id_bad_addr_mode);
452 }
453 }
454 3267 start_i = 0;
455
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3267 if((end_i = endmatch<',', 'x'>(arg)) >= 0) {
456
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1068 RETURN_IF_ALLOWED(x);
457 asar_throw_error(1, error_type_block, error_id_bad_addr_mode);
458 }
459
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2733 if((end_i = endmatch<',', 'y'>(arg)) >= 0) {
460
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156 RETURN_IF_ALLOWED(y);
461 asar_throw_error(1, error_type_block, error_id_bad_addr_mode);
462 }
463
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2655 if((end_i = endmatch<',', 's'>(arg)) >= 0) {
464
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96 RETURN_IF_ALLOWED(s);
465 asar_throw_error(1, error_type_block, error_id_bad_addr_mode);
466 }
467 2607 end_i = arg.length();
468 // hoping that by now, something would have stripped whitespace lol
469
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2607 if(arg.length() == 0) {
470
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2496 RETURN_IF_ALLOWED(imp);
471 asar_throw_error(1, error_type_block, error_id_bad_addr_mode);
472 }
473
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1359 if(arg == "a" || arg == "A") {
474
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78 RETURN_IF_ALLOWED(a);
475 // todo: some hint for "don't name your label "a" "?
476 6 asar_throw_error(1, error_type_block, error_id_bad_addr_mode);
477 }
478
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2634 RETURN_IF_ALLOWED(abs);
479 asar_throw_error(1, error_type_block, error_id_bad_addr_mode);
480 #undef RETURN_IF_ALLOWED
481
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4167 }
482
483 static const char* format_valid_widths(int min, int max) {
484 if(min == 1) {
485 if(max == 1) return "only 8-bit";
486 if(max == 2) return "only 8-bit or 16-bit";
487 if(max == 3) return "any width"; // shouldn't actually happen lol
488 } else if(min == 2) {
489 if(max == 2) return "only 16-bit";
490 if(max == 3) return "only 16-bit or 24-bit";
491 } else if(min == 3) {
492 return "only 24-bit";
493 }
494 return "???";
495 }
496
497 2736 static int get_real_len(int min_len, int max_len, int arg_min_len, char modifier, const parse_result& parsed) {
498 int out_len;
499
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2736 if(modifier != 0) {
500 780 out_len = getlenfromchar(modifier);
501
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774 if(out_len < min_len || out_len > max_len)
502 asar_throw_error(2, error_type_block, error_id_bad_access_width, format_valid_widths(min_len, max_len), out_len*8);
503 } else {
504
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1956 if(parsed.kind == addr_kind::imm) {
505
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315 if(!is_hex_constant(parsed.arg.data()))
506 99 asar_throw_warning(2, warning_id_implicitly_sized_immediate);
507
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315 if(arg_min_len == 3 && max_len == 2) {
508 // lda #label
509 // todo: throw pedantic warning
510 return max_len;
511 }
512 }
513
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1956 if(arg_min_len > max_len) {
514 // we might get here on pass 0 if getlen is wrong about the width,
515 // which can happen with forward labels and namespaces.
516 // in that case return some valid width to silence the error.
517 if(pass == 0) return max_len;
518
519 asar_throw_error(2, error_type_block, error_id_bad_access_width, format_valid_widths(min_len, max_len), arg_min_len*8);
520 }
521 // todo warn about widening when dpbase != 0
522 1956 out_len = std::max(arg_min_len, min_len);
523 }
524 2730 return out_len;
525 }
526
527 22 static int64_t get_branch_value(parse_result& parsed, char modifier, int width) {
528
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22 auto expr = parse_math_expr(parsed.arg);
529
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44 int64_t num = expr->evaluate().get_integer();
530
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22 bool target_is_abs = expr->has_label() > 0;
531
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22 if(modifier != 0) {
532 if(to_lower(modifier) == 'a') target_is_abs = true;
533 else if(to_lower(modifier) == 'r') target_is_abs = false;
534 // ignore for backwards compat
535 else if(to_lower(modifier) == 'b') {}
536 // TODO: better error message
537 else asar_throw_error(2, error_type_block, error_id_invalid_opcode_length);
538 }
539
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22 if(target_is_abs) {
540 // cast delta to signed 16-bit, this makes it possible to handle bank-border-wrapping automatically
541 20 int16_t delta = num - (snespos + width + 1);
542
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20 if((num & ~0xffff) != (snespos & ~0xffff)) {
543 // todo: should throw error "can't branch to different bank"
544 asar_throw_error(2, error_type_block, error_id_relative_branch_out_of_bounds, dec(delta).data());
545 }
546
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20 if(width==1 && (delta < -128 || delta > 127)) {
547 asar_throw_error(2, error_type_block, error_id_relative_branch_out_of_bounds, dec(delta).data());
548 }
549 20 return delta;
550 } else {
551
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2 if(num & ~(width==2 ? 0xffff : 0xff)) {
552 asar_throw_error(2, error_type_block, error_id_relative_branch_out_of_bounds, dec(num).data());
553 }
554
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2 return (int16_t)(width==2 ? num : (int8_t)num);
555 }
556 44 }
557
558 19288 bool asblock_65816(char** word, int numwords)
559 {
560 // first find the mnemonic from the first word
561 19288 int word_i = 0;
562 19288 bool autoclean = false;
563
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19288 if(!stricmpwithlower(word[0], "autoclean")) {
564 162 word_i++;
565 162 autoclean = true;
566 }
567
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19288 string mnem = word[word_i++];
568
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112471 for(int i = 0; i < mnem.length(); i++) mnem.raw()[i] = to_lower(mnem[i]);
569
570 19288 char modifier = 0;
571
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19288 if(mnem.length() >= 2 && mnem[mnem.length()-2] == '.') {
572 780 modifier = mnem[mnem.length()-1];
573
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780 mnem.truncate(mnem.length()-2);
574 }
575
576
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19288 auto it = mnemonic_lookup.the_map.find(mnem);
577
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19288 if(it == mnemonic_lookup.the_map.end()) return false;
578 4185 mnemonicinfo& mnem_info = it->second;
579
580 // join together all the other arguments
581 4185 string par;
582
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7194 for(int i = word_i; i < numwords; i++){
583
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3009 if(i > word_i) par += " ";
584
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3009 par += word[i];
585 }
586
587 // check if we're doing mvn/mvp, and if yes, parse completely differently
588 // this is a little hacky, sorry...
589
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4185 if(mnem_info.allowed_kinds_mask & 1<<(uint32_t)addr_kind::mvn) {
590 12 int count = 0;
591
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12 autoptr<char**> parts = qpsplit(par.raw(), ',', &count);
592
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12 if(count != 2) asar_throw_error(2, error_type_block, error_id_bad_addr_mode);
593 12 uint8_t opcode = mnem_info.types[(int)addr_kind::mvn].opcode_for_width[2];
594
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12 write1(opcode);
595 12 int64_t num1 = 0, num2 = 0;
596
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12 if(pass == 2) {
597
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4 num1 = getnum(parts[0]);
598
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4 num2 = getnum(parts[1]);
599 }
600
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12 if(num1 < 0 || num1 > 255) asar_throw_error(2, error_type_block, error_id_bad_access_width, format_valid_widths(1, 1), num1 > 65535 ? 24 : 16);
601
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12 if(num2 < 0 || num2 > 255) asar_throw_error(2, error_type_block, error_id_bad_access_width, format_valid_widths(1, 1), num2 > 65535 ? 24 : 16);
602
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12 write1(num1);
603
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12 write1(num2);
604 // a bit hacky to check this here, but we kinda do need to early-return here
605
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12 if(autoclean) asar_throw_error(2, error_type_block, error_id_broken_autoclean);
606 12 return true;
607 12 }
608
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4173 parse_result parse_res = parse_addr_kind(par, mnem_info.allowed_kinds_mask);
609 4167 mnem_kind_info& kind_info = mnem_info.types[(uint32_t)parse_res.kind];
610
611 // figure out the minimum/maximum argument width for this mnemonic+addr_kind combo
612 // todo this is mildly jank
613 // we also kinda implicitly assume that no insn has "gaps" in its allowed widths
614 4167 int min_w = 99;
615 4167 int max_w = 0;
616
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37503 for(int i = 0; i < 8; i++) {
617
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33336 if(kind_info.allowed_widths & 1<<i) {
618 7116 min_w = std::min(min_w, i);
619 7116 max_w = std::max(max_w, i);
620 }
621 }
622
623 // compute argument value
624
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4167 bool is_implied_rep = parse_res.kind == addr_kind::imm && (kind_info.flags & flag_implied_rep);
625 int arg_len;
626 int64_t arg_value;
627 4167 int64_t rep_count = 0;
628
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4167 if(kind_info.flags & flag_branch) {
629
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66 assert(min_w == max_w); // can't call get_real_len, but there should be only one width anyways
630 66 arg_len = min_w;
631
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66 arg_value = pass == 2 ? get_branch_value(parse_res, modifier, arg_len) : 0;
632
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4101 } else if(is_implied_rep) {
633 75 arg_len = 0;
634
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75 rep_count = parse_math_expr(parse_res.arg)->evaluate_static().get_integer();
635
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4026 } else if(parse_res.kind == addr_kind::imp || parse_res.kind == addr_kind::a) {
636 1284 arg_len = 0;
637 } else {
638 2742 int old_optimize = optimizeforbank;
639
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2742 if(kind_info.flags & flag_bank_0) optimizeforbank = 0;
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2718 else if(kind_info.flags & flag_bank_k) optimizeforbank = -1;
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2742 auto math_parsed = parse_math_expr(parse_res.arg);
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2736 int arg_min_len = math_parsed->get_len(parse_res.kind == addr_kind::imm);
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2736 arg_len = get_real_len(min_w, max_w, arg_min_len, modifier, parse_res);
644 2730 optimizeforbank = old_optimize;
645
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3645 arg_value = pass == 2 ? math_parsed->evaluate().get_integer() : 0;
646 2736 }
647
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4153 assert((kind_info.allowed_widths & 1<<arg_len) != 0);
649 4153 uint8_t opcode = kind_info.opcode_for_width[arg_len];
650
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4153 if(arg_len == 0 && (kind_info.flags & flag_imm_implied_0)) {
652 18 arg_len = 1;
653 18 arg_value = 0;
654 }
655
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4153 if(is_implied_rep) {
657
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249 for(int64_t i = 0; i < rep_count; i++) write1(opcode);
658 } else {
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4078 write1(opcode);
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4078 if(arg_len == 0);
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2812 else if(arg_len == 1) write1(arg_value);
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1591 else if(arg_len == 2) write2(arg_value);
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522 else if(arg_len == 3) write3(arg_value);
664 }
665
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4153 if(autoclean && pass > 0) {
667 // should be changed to "can't use autoclean on this instruction"?
668
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96 if(arg_len != 3) asar_throw_error(2, error_type_block, error_id_broken_autoclean);
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96 handle_autoclean(parse_res.arg, opcode, snespos - 4);
670 }
671 4153 return true;
672 20232 }
673