1 /* Print Z80, Z180, EZ80 and R800 instructions
2 Copyright (C) 2005-2022 Free Software Foundation, Inc.
3 Contributed by Arnold Metselaar <arnold_m@operamail.com>
4
5 This file is part of the GNU opcodes library.
6
7 This library is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
10 any later version.
11
12 It is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
21
22 #include "sysdep.h"
23 #include "disassemble.h"
24 #include <stdio.h>
25
26 struct buffer
27 {
28 bfd_vma base;
29 int n_fetch;
30 int n_used;
31 signed char data[6];
32 long inss; /* instruction set bit mask, taken from bfd_mach */
33 int nn_len; /* address length: 2 - Z80 mode, 3 - ADL mode*/
34 } ;
35
36 typedef int (*func)(struct buffer *, disassemble_info *, const char *);
37
38 struct tab_elt
39 {
40 unsigned char val;
41 unsigned char mask;
42 func fp;
43 const char * text;
44 unsigned inss; /* bit mask of supported bfd_mach_* or 0 for all mach */
45 } ;
46
47 #define INSS_ALL 0
48 #define INSS_Z80 ((1 << bfd_mach_z80) | (1 << bfd_mach_z80strict) | (1 << bfd_mach_z80full))
49 #define INSS_R800 (1 << bfd_mach_r800)
50 #define INSS_GBZ80 (1 << bfd_mach_gbz80)
51 #define INSS_Z180 (1 << bfd_mach_z180)
52 #define INSS_EZ80_Z80 (1 << bfd_mach_ez80_z80)
53 #define INSS_EZ80_ADL (1 << bfd_mach_ez80_adl)
54 #define INSS_EZ80 (INSS_EZ80_ADL | INSS_EZ80_Z80)
55 #define INSS_Z80N (1 << bfd_mach_z80n)
56
57 #define TXTSIZ 24
58 /* Names of 16-bit registers. */
59 static const char * rr_str[] = { "bc", "de", "hl", "sp" };
60 /* Names of 8-bit registers. */
61 static const char * r_str[] = { "b", "c", "d", "e", "h", "l", "(hl)", "a" };
62 /* Texts for condition codes. */
63 static const char * cc_str[] = { "nz", "z", "nc", "c", "po", "pe", "p", "m" };
64 /* Instruction names for 8-bit arithmetic, operand "a" is often implicit */
65 static const char * arit_str[] =
66 {
67 "add a,", "adc a,", "sub ", "sbc a,", "and ", "xor ", "or ", "cp "
68 } ;
69 static const char * arit_str_gbz80[] =
70 {
71 "add a,", "adc a,", "sub a,", "sbc a,", "and ", "xor ", "or ", "cp "
72 } ;
73 static const char * arit_str_ez80[] =
74 {
75 "add a,", "adc a,", "sub a,", "sbc a,", "and a,", "xor a,", "or a,", "cp a,"
76 } ;
77
78
79 static int
mach_inst(struct buffer * buf,const struct tab_elt * p)80 mach_inst (struct buffer *buf, const struct tab_elt *p)
81 {
82 return !p->inss || (p->inss & buf->inss);
83 }
84
85 static int
fetch_data(struct buffer * buf,disassemble_info * info,int n)86 fetch_data (struct buffer *buf, disassemble_info * info, int n)
87 {
88 int r;
89
90 if (buf->n_fetch + n > (int)sizeof (buf->data))
91 abort ();
92
93 r = info->read_memory_func (buf->base + buf->n_fetch,
94 (unsigned char*) buf->data + buf->n_fetch,
95 n, info);
96 if (r == 0)
97 buf->n_fetch += n;
98 else
99 info->memory_error_func (r, buf->base + buf->n_fetch, info);
100 return !r;
101 }
102
103 static int
prt(struct buffer * buf,disassemble_info * info,const char * txt)104 prt (struct buffer *buf, disassemble_info * info, const char *txt)
105 {
106 info->fprintf_func (info->stream, "%s", txt);
107 buf->n_used = buf->n_fetch;
108 return 1;
109 }
110
111 static int
prt_e(struct buffer * buf,disassemble_info * info,const char * txt)112 prt_e (struct buffer *buf, disassemble_info * info, const char *txt)
113 {
114 char e;
115 int target_addr;
116
117 if (fetch_data (buf, info, 1))
118 {
119 e = buf->data[1];
120 target_addr = (buf->base + 2 + e) & 0xffff;
121 buf->n_used = buf->n_fetch;
122 info->fprintf_func (info->stream, "%s0x%04x", txt, target_addr);
123 }
124 else
125 buf->n_used = -1;
126
127 return buf->n_used;
128 }
129
130 static int
jr_cc(struct buffer * buf,disassemble_info * info,const char * txt)131 jr_cc (struct buffer *buf, disassemble_info * info, const char *txt)
132 {
133 char mytxt[TXTSIZ];
134
135 snprintf (mytxt, TXTSIZ, txt, cc_str[(buf->data[0] >> 3) & 3]);
136 return prt_e (buf, info, mytxt);
137 }
138
139 static int
prt_nn(struct buffer * buf,disassemble_info * info,const char * txt)140 prt_nn (struct buffer *buf, disassemble_info * info, const char *txt)
141 {
142 int nn;
143 unsigned char *p;
144 int i;
145
146 p = (unsigned char*) buf->data + buf->n_fetch;
147 if (fetch_data (buf, info, buf->nn_len))
148 {
149 nn = 0;
150 i = buf->nn_len;
151 while (i--)
152 nn = nn * 0x100 + p[i];
153 info->fprintf_func (info->stream, txt, nn);
154 buf->n_used = buf->n_fetch;
155 }
156 else
157 buf->n_used = -1;
158 return buf->n_used;
159 }
160
161 static int
prt_rr_nn(struct buffer * buf,disassemble_info * info,const char * txt)162 prt_rr_nn (struct buffer *buf, disassemble_info * info, const char *txt)
163 {
164 char mytxt[TXTSIZ];
165 int rr;
166
167 rr = (buf->data[buf->n_fetch - 1] >> 4) & 3;
168 snprintf (mytxt, TXTSIZ, txt, rr_str[rr]);
169 return prt_nn (buf, info, mytxt);
170 }
171
172 static int
prt_rr(struct buffer * buf,disassemble_info * info,const char * txt)173 prt_rr (struct buffer *buf, disassemble_info * info, const char *txt)
174 {
175 info->fprintf_func (info->stream, "%s%s", txt,
176 rr_str[(buf->data[buf->n_fetch - 1] >> 4) & 3]);
177 buf->n_used = buf->n_fetch;
178 return buf->n_used;
179 }
180
181 static int
prt_n(struct buffer * buf,disassemble_info * info,const char * txt)182 prt_n (struct buffer *buf, disassemble_info * info, const char *txt)
183 {
184 int n;
185 unsigned char *p;
186
187 p = (unsigned char*) buf->data + buf->n_fetch;
188
189 if (fetch_data (buf, info, 1))
190 {
191 n = p[0];
192 info->fprintf_func (info->stream, txt, n);
193 buf->n_used = buf->n_fetch;
194 }
195 else
196 buf->n_used = -1;
197
198 return buf->n_used;
199 }
200
201 static int
prt_n_n(struct buffer * buf,disassemble_info * info,const char * txt)202 prt_n_n (struct buffer *buf, disassemble_info * info, const char *txt)
203 {
204 char mytxt[TXTSIZ];
205 int n;
206 unsigned char *p;
207
208 p = (unsigned char*) buf->data + buf->n_fetch;
209
210 if (fetch_data (buf, info, 1))
211 {
212 n = p[0];
213 snprintf (mytxt, TXTSIZ, txt, n);
214 buf->n_used = buf->n_fetch;
215 }
216 else
217 buf->n_used = -1;
218
219 return prt_n (buf, info, mytxt);
220 }
221
222 static int
prt_r_n(struct buffer * buf,disassemble_info * info,const char * txt)223 prt_r_n (struct buffer *buf, disassemble_info * info, const char *txt)
224 {
225 char mytxt[TXTSIZ];
226 int r;
227
228 r = (buf->data[buf->n_fetch - 1] >> 3) & 7;
229 snprintf (mytxt, TXTSIZ, txt, r_str[r]);
230 return prt_n (buf, info, mytxt);
231 }
232
233 static int
ld_r_n(struct buffer * buf,disassemble_info * info,const char * txt)234 ld_r_n (struct buffer *buf, disassemble_info * info, const char *txt)
235 {
236 char mytxt[TXTSIZ];
237
238 snprintf (mytxt, TXTSIZ, txt, r_str[(buf->data[buf->n_fetch - 1] >> 3) & 7]);
239 return prt_n (buf, info, mytxt);
240 }
241
242 static int
prt_r(struct buffer * buf,disassemble_info * info,const char * txt)243 prt_r (struct buffer *buf, disassemble_info * info, const char *txt)
244 {
245 info->fprintf_func (info->stream, txt,
246 r_str[(buf->data[buf->n_fetch - 1] >> 3) & 7]);
247 buf->n_used = buf->n_fetch;
248 return buf->n_used;
249 }
250
251 static int
ld_r_r(struct buffer * buf,disassemble_info * info,const char * txt)252 ld_r_r (struct buffer *buf, disassemble_info * info, const char *txt)
253 {
254 info->fprintf_func (info->stream, txt,
255 r_str[(buf->data[buf->n_fetch - 1] >> 3) & 7],
256 r_str[buf->data[buf->n_fetch - 1] & 7]);
257 buf->n_used = buf->n_fetch;
258 return buf->n_used;
259 }
260
261 static int
prt_d(struct buffer * buf,disassemble_info * info,const char * txt)262 prt_d (struct buffer *buf, disassemble_info * info, const char *txt)
263 {
264 int d;
265 signed char *p;
266
267 p = buf->data + buf->n_fetch;
268
269 if (fetch_data (buf, info, 1))
270 {
271 d = p[0];
272 info->fprintf_func (info->stream, txt, d);
273 buf->n_used = buf->n_fetch;
274 }
275 else
276 buf->n_used = -1;
277
278 return buf->n_used;
279 }
280
281 static int
prt_rr_d(struct buffer * buf,disassemble_info * info,const char * txt)282 prt_rr_d (struct buffer *buf, disassemble_info * info, const char *txt)
283 {
284 char mytxt[TXTSIZ];
285 int rr;
286
287 rr = (buf->data[buf->n_fetch - 1] >> 4) & 3;
288 if (rr == 3) /* SP is not supported */
289 return 0;
290
291 snprintf (mytxt, TXTSIZ, txt, rr_str[rr]);
292 return prt_d (buf, info, mytxt);
293 }
294
295 static int
arit_r(struct buffer * buf,disassemble_info * info,const char * txt)296 arit_r (struct buffer *buf, disassemble_info * info, const char *txt)
297 {
298 const char * const *arit;
299
300 if (buf->inss & INSS_EZ80)
301 arit = arit_str_ez80;
302 else if (buf->inss & INSS_GBZ80)
303 arit = arit_str_gbz80;
304 else
305 arit = arit_str;
306
307 info->fprintf_func (info->stream, txt,
308 arit[(buf->data[buf->n_fetch - 1] >> 3) & 7],
309 r_str[buf->data[buf->n_fetch - 1] & 7]);
310 buf->n_used = buf->n_fetch;
311 return buf->n_used;
312 }
313
314 static int
prt_cc(struct buffer * buf,disassemble_info * info,const char * txt)315 prt_cc (struct buffer *buf, disassemble_info * info, const char *txt)
316 {
317 info->fprintf_func (info->stream, "%s%s", txt,
318 cc_str[(buf->data[0] >> 3) & 7]);
319 buf->n_used = buf->n_fetch;
320 return buf->n_used;
321 }
322
323 static int
pop_rr(struct buffer * buf,disassemble_info * info,const char * txt)324 pop_rr (struct buffer *buf, disassemble_info * info, const char *txt)
325 {
326 static char *rr_stack[] = { "bc","de","hl","af"};
327
328 info->fprintf_func (info->stream, "%s %s", txt,
329 rr_stack[(buf->data[0] >> 4) & 3]);
330 buf->n_used = buf->n_fetch;
331 return buf->n_used;
332 }
333
334
335 static int
jp_cc_nn(struct buffer * buf,disassemble_info * info,const char * txt)336 jp_cc_nn (struct buffer *buf, disassemble_info * info, const char *txt)
337 {
338 char mytxt[TXTSIZ];
339
340 snprintf (mytxt,TXTSIZ,
341 "%s%s,0x%%04x", txt, cc_str[(buf->data[0] >> 3) & 7]);
342 return prt_nn (buf, info, mytxt);
343 }
344
345 static int
arit_n(struct buffer * buf,disassemble_info * info,const char * txt)346 arit_n (struct buffer *buf, disassemble_info * info, const char *txt)
347 {
348 char mytxt[TXTSIZ];
349 const char * const *arit;
350
351 if (buf->inss & INSS_EZ80)
352 arit = arit_str_ez80;
353 else if (buf->inss & INSS_GBZ80)
354 arit = arit_str_gbz80;
355 else
356 arit = arit_str;
357
358 snprintf (mytxt,TXTSIZ, txt, arit[(buf->data[0] >> 3) & 7]);
359 return prt_n (buf, info, mytxt);
360 }
361
362 static int
rst(struct buffer * buf,disassemble_info * info,const char * txt)363 rst (struct buffer *buf, disassemble_info * info, const char *txt)
364 {
365 info->fprintf_func (info->stream, txt, buf->data[0] & 0x38);
366 buf->n_used = buf->n_fetch;
367 return buf->n_used;
368 }
369
370
371 static int
cis(struct buffer * buf,disassemble_info * info,const char * txt ATTRIBUTE_UNUSED)372 cis (struct buffer *buf, disassemble_info * info, const char *txt ATTRIBUTE_UNUSED)
373 {
374 static char * opar[] = { "ld", "cp", "in", "out" };
375 char * op;
376 char c;
377
378 c = buf->data[1];
379 op = ((0x13 & c) == 0x13) ? "ot" : (opar[c & 3]);
380 info->fprintf_func (info->stream,
381 "%s%c%s", op,
382 (c & 0x08) ? 'd' : 'i',
383 (c & 0x10) ? "r" : "");
384 buf->n_used = 2;
385 return buf->n_used;
386 }
387
388 static int
cism(struct buffer * buf,disassemble_info * info,const char * txt ATTRIBUTE_UNUSED)389 cism (struct buffer *buf, disassemble_info * info, const char *txt ATTRIBUTE_UNUSED)
390 {
391 static char * opar[] = { "in%cm%s", "ot%cm%s" };
392 char * op;
393 char c;
394
395 c = buf->data[1];
396 op = opar[c & 1];
397 info->fprintf_func (info->stream,
398 op,
399 (c & 0x08) ? 'd' : 'i',
400 (c & 0x10) ? "r" : "");
401 buf->n_used = 2;
402 return buf->n_used;
403 }
404
405 static int
dump(struct buffer * buf,disassemble_info * info,const char * txt)406 dump (struct buffer *buf, disassemble_info * info, const char *txt)
407 {
408 int i;
409
410 info->fprintf_func (info->stream, "defb ");
411 for (i = 0; txt[i]; ++i)
412 info->fprintf_func (info->stream, i ? ", 0x%02x" : "0x%02x",
413 (unsigned char) buf->data[i]);
414 buf->n_used = i;
415 return buf->n_used;
416 }
417
418 /* Table to disassemble machine codes with prefix 0xED. */
419 static const struct tab_elt opc_ed[] =
420 {
421 { 0x30, 0xFF, prt, "mul d,e", INSS_Z80N },
422 { 0x31, 0xFF, prt, "add hl,a", INSS_Z80N },
423 { 0x31, 0xFF, prt, "ld iy,(hl)", INSS_EZ80 },
424 { 0x30, 0xFE, dump, "xx", INSS_ALL }, /* do not move this line */
425 { 0x00, 0xC7, prt_r_n, "in0 %s,(0x%%02x)", INSS_Z180|INSS_EZ80 },
426 { 0x01, 0xC7, prt_r_n, "out0 (0x%%02x),%s", INSS_Z180|INSS_EZ80 },
427 { 0x32, 0xFF, prt_d, "lea ix,ix%+d", INSS_EZ80 },
428 { 0x33, 0xFF, prt_d, "lea iy,iy%+d", INSS_EZ80 },
429 { 0x02, 0xCF, prt_rr_d, "lea %s,ix%%+d", INSS_EZ80 },
430 { 0x03, 0xCF, prt_rr_d, "lea %s,iy%%+d", INSS_EZ80 },
431 { 0x04, 0xC7, prt_r, "tst %s", INSS_Z180},
432 { 0x04, 0xC7, prt_r, "tst a,%s", INSS_EZ80 },
433 { 0x07, 0xFF, prt, "ld bc,(hl)", INSS_EZ80 },
434 { 0x3F, 0xFF, prt, "ld (hl),ix", INSS_EZ80 },
435 { 0x0F, 0xCF, prt_rr, "ld (hl),", INSS_EZ80 },
436 { 0x17, 0xFF, prt, "ld de,(hl)", INSS_EZ80 },
437 { 0x23, 0xFF, prt, "swapnib", INSS_Z80N },
438 { 0x24, 0xFF, prt, "mirror", INSS_Z80N },
439 { 0x27, 0xFF, prt, "ld hl,(hl)", INSS_EZ80 },
440 { 0x27, 0xFF, prt_n, "test 0x%02x", INSS_Z80N },
441 { 0x28, 0xFF, prt, "bsla de,b", INSS_Z80N },
442 { 0x29, 0xFF, prt, "bsra de,b", INSS_Z80N },
443 { 0x2A, 0xFF, prt, "bsrl de,b", INSS_Z80N },
444 { 0x2B, 0xFF, prt, "bsrf de,b", INSS_Z80N },
445 { 0x2C, 0xFF, prt, "bslc de,b", INSS_Z80N },
446 { 0x32, 0xFF, prt, "add de,a", INSS_Z80N },
447 { 0x33, 0xFF, prt, "add bc,a", INSS_Z80N },
448 { 0x34, 0xFF, prt_nn, "add hl,0x%04x", INSS_Z80N },
449 { 0x35, 0xFF, prt_nn, "add de,0x%04x", INSS_Z80N },
450 { 0x36, 0xFF, prt_nn, "add bc,0x%04x", INSS_Z80N },
451 { 0x37, 0xFF, prt, "ld ix,(hl)", INSS_EZ80 },
452 { 0x3E, 0xFF, prt, "ld (hl),iy", INSS_EZ80 },
453 { 0x70, 0xFF, prt, "in f,(c)", INSS_Z80 | INSS_R800 | INSS_Z80N },
454 { 0x70, 0xFF, dump, "xx", INSS_ALL },
455 { 0x40, 0xC7, prt_r, "in %s,(bc)", INSS_EZ80 },
456 { 0x40, 0xC7, prt_r, "in %s,(c)", INSS_ALL },
457 { 0x71, 0xFF, prt, "out (c),0", INSS_Z80 | INSS_Z80N },
458 { 0x71, 0xFF, dump, "xx", INSS_ALL },
459 { 0x41, 0xC7, prt_r, "out (bc),%s", INSS_EZ80 },
460 { 0x41, 0xC7, prt_r, "out (c),%s", INSS_ALL },
461 { 0x42, 0xCF, prt_rr, "sbc hl,", INSS_ALL },
462 { 0x43, 0xCF, prt_rr_nn, "ld (0x%%04x),%s", INSS_ALL },
463 { 0x44, 0xFF, prt, "neg", INSS_ALL },
464 { 0x45, 0xFF, prt, "retn", INSS_ALL },
465 { 0x46, 0xFF, prt, "im 0", INSS_ALL },
466 { 0x47, 0xFF, prt, "ld i,a", INSS_ALL },
467 { 0x4A, 0xCF, prt_rr, "adc hl,", INSS_ALL },
468 { 0x4B, 0xCF, prt_rr_nn, "ld %s,(0x%%04x)", INSS_ALL },
469 { 0x4C, 0xCF, prt_rr, "mlt ", INSS_Z180|INSS_EZ80 },
470 { 0x4D, 0xFF, prt, "reti", INSS_ALL },
471 { 0x4F, 0xFF, prt, "ld r,a", INSS_ALL },
472 { 0x54, 0xFF, prt_d, "lea ix,iy%+d", INSS_EZ80 },
473 { 0x55, 0xFF, prt_d, "lea iy,ix%+d", INSS_EZ80 },
474 { 0x56, 0xFF, prt, "im 1", INSS_ALL },
475 { 0x57, 0xFF, prt, "ld a,i", INSS_ALL },
476 { 0x5E, 0xFF, prt, "im 2", INSS_ALL },
477 { 0x5F, 0xFF, prt, "ld a,r", INSS_ALL },
478 { 0x64, 0xFF, prt_n, "tst 0x%02x", INSS_Z180 },
479 { 0x64, 0xFF, prt_n, "tst a,0x%02x", INSS_EZ80 },
480 { 0x65, 0xFF, prt_d, "pea ix%+d", INSS_EZ80 },
481 { 0x66, 0xFF, prt_d, "pea iy%+d", INSS_EZ80 },
482 { 0x67, 0xFF, prt, "rrd", INSS_ALL },
483 { 0x6D, 0xFF, prt, "ld mb,a", INSS_EZ80 },
484 { 0x6E, 0xFF, prt, "ld a,mb", INSS_EZ80 },
485 { 0x6F, 0xFF, prt, "rld", INSS_ALL },
486 { 0x74, 0xFF, prt_n, "tstio 0x%02x", INSS_Z180|INSS_EZ80 },
487 { 0x76, 0xFF, prt, "slp", INSS_Z180|INSS_EZ80 },
488 { 0x7D, 0xFF, prt, "stmix", INSS_EZ80 },
489 { 0x7E, 0xFF, prt, "rsmix", INSS_EZ80 },
490 { 0x82, 0xE6, cism, "", INSS_Z180|INSS_EZ80 },
491 { 0x84, 0xFF, prt, "ini2", INSS_EZ80 },
492 { 0x8A, 0xFF, prt_n_n, "push 0x%02x%%02x", INSS_Z80N },
493 { 0x8C, 0xFF, prt, "ind2", INSS_EZ80 },
494 { 0x90, 0xFF, prt, "outinb", INSS_Z80N },
495 { 0x91, 0xFF, prt_n_n, "nextreg 0x%02x,0x%%02x", INSS_Z80N },
496 { 0x92, 0xFF, prt_n, "nextreg 0x%02x,a", INSS_Z80N },
497 { 0x93, 0xFF, prt, "pixeldn", INSS_Z80N },
498 { 0x94, 0xFF, prt, "ini2r", INSS_EZ80 },
499 { 0x94, 0xFF, prt, "pixelad", INSS_Z80N },
500 { 0x95, 0xFF, prt, "setae", INSS_Z80N },
501 { 0x98, 0xFF, prt, "jp (c)", INSS_Z80N },
502 { 0x9c, 0xFF, prt, "ind2r", INSS_EZ80 },
503 { 0xA0, 0xE4, cis, "", INSS_ALL },
504 { 0xA4, 0xFF, prt, "outi2", INSS_EZ80 },
505 { 0xA4, 0xFF, prt, "ldix", INSS_Z80N },
506 { 0xAC, 0xFF, prt, "outd2", INSS_EZ80 },
507 { 0xAC, 0xFF, prt, "lddx", INSS_Z80N },
508 { 0xA5, 0xFF, prt, "ldws", INSS_Z80N },
509 { 0xB4, 0xFF, prt, "oti2r", INSS_EZ80 },
510 { 0xB4, 0xFF, prt, "ldirx", INSS_Z80N },
511 { 0xB7, 0xFF, prt, "ldpirx", INSS_Z80N },
512 { 0xBC, 0xFF, prt, "otd2r", INSS_EZ80 },
513 { 0xBC, 0xFF, prt, "lddrx", INSS_Z80N },
514 { 0xC2, 0xFF, prt, "inirx", INSS_EZ80 },
515 { 0xC3, 0xFF, prt, "otirx", INSS_EZ80 },
516 { 0xC7, 0xFF, prt, "ld i,hl", INSS_EZ80 },
517 { 0xCA, 0xFF, prt, "indrx", INSS_EZ80 },
518 { 0xCB, 0xFF, prt, "otdrx", INSS_EZ80 },
519 { 0xC3, 0xFF, prt, "muluw hl,bc", INSS_R800 },
520 { 0xC5, 0xE7, prt_r, "mulub a,%s", INSS_R800 },
521 { 0xD7, 0xFF, prt, "ld hl,i", INSS_EZ80 },
522 { 0xF3, 0xFF, prt, "muluw hl,sp", INSS_R800 },
523 { 0x00, 0x00, dump, "xx", INSS_ALL }
524 };
525
526 static int
pref_ed(struct buffer * buf,disassemble_info * info,const char * txt ATTRIBUTE_UNUSED)527 pref_ed (struct buffer *buf, disassemble_info *info,
528 const char *txt ATTRIBUTE_UNUSED)
529 {
530 const struct tab_elt *p;
531
532 if (fetch_data (buf, info, 1))
533 {
534 for (p = opc_ed; p->val != (buf->data[1] & p->mask) || !mach_inst (buf, p); ++p)
535 ;
536 p->fp (buf, info, p->text);
537 }
538 else
539 buf->n_used = -1;
540
541 return buf->n_used;
542 }
543
544 /* Instruction names for the instructions addressing single bits. */
545 static char *cb1_str[] = { "", "bit", "res", "set"};
546 /* Instruction names for shifts and rotates. */
547 static char *cb2_str[] =
548 {
549 "rlc", "rrc", "rl", "rr", "sla", "sra", "sli", "srl"
550 };
551
552 static int
pref_cb(struct buffer * buf,disassemble_info * info,const char * txt ATTRIBUTE_UNUSED)553 pref_cb (struct buffer *buf, disassemble_info *info,
554 const char *txt ATTRIBUTE_UNUSED)
555 {
556 const char *op_txt;
557 int idx;
558 if (fetch_data (buf, info, 1))
559 {
560 buf->n_used = 2;
561 if ((buf->data[1] & 0xc0) == 0)
562 {
563 idx = (buf->data[1] >> 3) & 7;
564 if ((buf->inss & INSS_GBZ80) && (idx == 6))
565 op_txt = "swap";
566 else
567 op_txt = cb2_str[idx];
568 info->fprintf_func (info->stream, "%s %s",
569 op_txt,
570 r_str[buf->data[1] & 7]);
571 }
572 else
573 info->fprintf_func (info->stream, "%s %d,%s",
574 cb1_str[(buf->data[1] >> 6) & 3],
575 (buf->data[1] >> 3) & 7,
576 r_str[buf->data[1] & 7]);
577 }
578 else
579 buf->n_used = -1;
580
581 return buf->n_used;
582 }
583
584 static int
addvv(struct buffer * buf,disassemble_info * info,const char * txt)585 addvv (struct buffer * buf, disassemble_info * info, const char *txt)
586 {
587 info->fprintf_func (info->stream, "add %s,%s", txt, txt);
588
589 return buf->n_used = buf->n_fetch;
590 }
591
592 static int
ld_v_v(struct buffer * buf,disassemble_info * info,const char * txt)593 ld_v_v (struct buffer * buf, disassemble_info * info, const char *txt)
594 {
595 char mytxt[TXTSIZ];
596
597 snprintf (mytxt, TXTSIZ, "ld %s%%s,%s%%s", txt, txt);
598 return ld_r_r (buf, info, mytxt);
599 }
600
601 static int
prt_d_n(struct buffer * buf,disassemble_info * info,const char * txt)602 prt_d_n (struct buffer *buf, disassemble_info * info, const char *txt)
603 {
604 char mytxt[TXTSIZ];
605 int d;
606 signed char *p;
607
608 p = buf->data + buf->n_fetch;
609
610 if (fetch_data (buf, info, 1))
611 {
612 d = p[0];
613 snprintf (mytxt, TXTSIZ, txt, d);
614 return prt_n (buf, info, mytxt);
615 }
616 else
617 buf->n_used = -1;
618
619 return buf->n_used;
620 }
621
622 static int
arit_d(struct buffer * buf,disassemble_info * info,const char * txt)623 arit_d (struct buffer *buf, disassemble_info * info, const char *txt)
624 {
625 char mytxt[TXTSIZ];
626 signed char c;
627 const char * const *arit;
628
629 arit = (buf->inss & INSS_EZ80) ? arit_str_ez80 : arit_str;
630 c = buf->data[buf->n_fetch - 1];
631 snprintf (mytxt, TXTSIZ, txt, arit[(c >> 3) & 7]);
632 return prt_d (buf, info, mytxt);
633 }
634
635 static int
ld_r_d(struct buffer * buf,disassemble_info * info,const char * txt)636 ld_r_d (struct buffer *buf, disassemble_info * info, const char *txt)
637 {
638 char mytxt[TXTSIZ];
639 signed char c;
640
641 c = buf->data[buf->n_fetch - 1];
642 snprintf (mytxt, TXTSIZ, txt, r_str[(c >> 3) & 7]);
643 return prt_d (buf, info, mytxt);
644 }
645
646 static int
ld_d_r(struct buffer * buf,disassemble_info * info,const char * txt)647 ld_d_r (struct buffer *buf, disassemble_info * info, const char *txt)
648 {
649 char mytxt[TXTSIZ];
650 signed char c;
651
652 c = buf->data[buf->n_fetch - 1];
653 snprintf (mytxt, TXTSIZ, txt, r_str[c & 7]);
654 return prt_d (buf, info, mytxt);
655 }
656
657 static int
ld_ii_ii(struct buffer * buf,disassemble_info * info,const char * txt)658 ld_ii_ii (struct buffer *buf, disassemble_info * info, const char *txt)
659 {
660 char mytxt[TXTSIZ];
661 signed char c;
662 int p;
663 static const char *ii[2] = { "ix", "iy" };
664
665 p = (buf->data[buf->n_fetch - 2] == (signed char) 0xdd) ? 0 : 1;
666 c = buf->data[buf->n_fetch - 1];
667 if ((c & 0x07) != 0x07)
668 p = 1 - p; /* 0 -> 1, 1 -> 0 */
669 snprintf (mytxt, TXTSIZ, txt, ii[p]);
670 return prt_d (buf, info, mytxt);
671 }
672
673 static int
pref_xd_cb(struct buffer * buf,disassemble_info * info,const char * txt)674 pref_xd_cb (struct buffer * buf, disassemble_info * info, const char *txt)
675 {
676 if (fetch_data (buf, info, 2))
677 {
678 int d;
679 char arg[TXTSIZ];
680 signed char *p;
681
682 buf->n_used = 4;
683 p = buf->data;
684 d = p[2];
685
686 if (((p[3] & 0xC0) == 0x40) || ((p[3] & 7) == 0x06))
687 snprintf (arg, TXTSIZ, "(%s%+d)", txt, d);
688 else
689 snprintf (arg, TXTSIZ, "(%s%+d),%s", txt, d, r_str[p[3] & 7]);
690
691 if ((p[3] & 0xc0) == 0)
692 info->fprintf_func (info->stream, "%s %s",
693 cb2_str[(buf->data[3] >> 3) & 7],
694 arg);
695 else
696 info->fprintf_func (info->stream, "%s %d,%s",
697 cb1_str[(buf->data[3] >> 6) & 3],
698 (buf->data[3] >> 3) & 7,
699 arg);
700 }
701 else
702 buf->n_used = -1;
703
704 return buf->n_used;
705 }
706
707 /* Table to disassemble machine codes with prefix 0xDD or 0xFD. */
708 static struct tab_elt opc_ind[] =
709 {
710 { 0x07, 0xFF, prt_d, "ld bc,(%s%%+d)", INSS_EZ80 },
711 { 0x0F, 0xFF, prt_d, "ld (%s%%+d),bc", INSS_EZ80 },
712 { 0x17, 0xFF, prt_d, "ld de,(%s%%+d)", INSS_EZ80 },
713 { 0x1F, 0xFF, prt_d, "ld (%s%%+d),de", INSS_EZ80 },
714 { 0x24, 0xF7, prt_r, "inc %s%%s", INSS_ALL },
715 { 0x25, 0xF7, prt_r, "dec %s%%s", INSS_ALL },
716 { 0x26, 0xF7, ld_r_n, "ld %s%%s,0x%%%%02x", INSS_ALL },
717 { 0x27, 0xFF, prt_d, "ld hl,(%s%%+d)", INSS_EZ80 },
718 { 0x2F, 0xFF, prt_d, "ld (%s%%+d),hl", INSS_EZ80 },
719 { 0x21, 0xFF, prt_nn, "ld %s,0x%%04x", INSS_ALL },
720 { 0x22, 0xFF, prt_nn, "ld (0x%%04x),%s", INSS_ALL },
721 { 0x2A, 0xFF, prt_nn, "ld %s,(0x%%04x)", INSS_ALL },
722 { 0x23, 0xFF, prt, "inc %s", INSS_ALL },
723 { 0x2B, 0xFF, prt, "dec %s", INSS_ALL },
724 { 0x29, 0xFF, addvv, "%s", INSS_ALL },
725 { 0x31, 0xFF, ld_ii_ii, "ld %%s,(%s%%%%+d)", INSS_EZ80 },
726 { 0x37, 0xFF, ld_ii_ii, "ld %%s,(%s%%%%+d)", INSS_EZ80 },
727 { 0x3E, 0xFE, ld_ii_ii, "ld (%s%%%%+d),%%s", INSS_EZ80 },
728 { 0x09, 0xCF, prt_rr, "add %s,", INSS_ALL },
729 { 0x34, 0xFF, prt_d, "inc (%s%%+d)", INSS_ALL },
730 { 0x35, 0xFF, prt_d, "dec (%s%%+d)", INSS_ALL },
731 { 0x36, 0xFF, prt_d_n, "ld (%s%%+d),0x%%%%02x", INSS_ALL },
732
733 { 0x76, 0xFF, dump, "h", INSS_ALL },
734 { 0x46, 0xC7, ld_r_d, "ld %%s,(%s%%%%+d)", INSS_ALL },
735 { 0x70, 0xF8, ld_d_r, "ld (%s%%%%+d),%%s", INSS_ALL },
736 { 0x64, 0xF6, ld_v_v, "%s", INSS_ALL },
737 { 0x60, 0xF0, ld_r_r, "ld %s%%s,%%s", INSS_ALL },
738 { 0x44, 0xC6, ld_r_r, "ld %%s,%s%%s", INSS_ALL },
739
740 { 0x86, 0xC7, arit_d, "%%s(%s%%%%+d)", INSS_ALL },
741 { 0x84, 0xC6, arit_r, "%%s%s%%s", INSS_ALL },
742
743 { 0xE1, 0xFF, prt, "pop %s", INSS_ALL },
744 { 0xE5, 0xFF, prt, "push %s", INSS_ALL },
745 { 0xCB, 0xFF, pref_xd_cb, "%s", INSS_ALL },
746 { 0xE3, 0xFF, prt, "ex (sp),%s", INSS_ALL },
747 { 0xE9, 0xFF, prt, "jp (%s)", INSS_ALL },
748 { 0xF9, 0xFF, prt, "ld sp,%s", INSS_ALL },
749 { 0x00, 0x00, dump, "?", INSS_ALL },
750 } ;
751
752 static int
pref_ind(struct buffer * buf,disassemble_info * info,const char * txt)753 pref_ind (struct buffer *buf, disassemble_info *info, const char *txt)
754 {
755 if (fetch_data (buf, info, 1))
756 {
757 char mytxt[TXTSIZ];
758 struct tab_elt *p;
759
760 for (p = opc_ind; p->val != (buf->data[1] & p->mask) || !mach_inst (buf, p); ++p)
761 ;
762 snprintf (mytxt, TXTSIZ, p->text, txt);
763 p->fp (buf, info, mytxt);
764 }
765 else
766 buf->n_used = -1;
767
768 return buf->n_used;
769 }
770
771 static int
772 print_insn_z80_buf (struct buffer *buf, disassemble_info *info);
773
774 static int
suffix(struct buffer * buf,disassemble_info * info,const char * txt)775 suffix (struct buffer *buf, disassemble_info *info, const char *txt)
776 {
777 char mybuf[TXTSIZ*4];
778 fprintf_ftype old_fprintf;
779 void *old_stream;
780 char *p;
781
782 switch (txt[2])
783 {
784 case 'l': /* SIL or LIL */
785 buf->nn_len = 3;
786 break;
787 case 's': /* SIS or LIS */
788 buf->nn_len = 2;
789 break;
790 default:
791 abort ();
792 }
793 if (!fetch_data (buf, info, 1)
794 || buf->data[1] == 0x40
795 || buf->data[1] == 0x49
796 || buf->data[1] == 0x52
797 || buf->data[1] == 0x5b)
798 {
799 /* Double prefix, or end of data. */
800 info->fprintf_func (info->stream, ".db 0x%02x ; %s", (unsigned)buf->data[0], txt);
801 buf->n_used = 1;
802 return buf->n_used;
803 }
804
805 old_fprintf = info->fprintf_func;
806 old_stream = info->stream;
807 info->fprintf_func = (fprintf_ftype) &sprintf;
808 info->stream = mybuf;
809 mybuf[0] = 0;
810 buf->base++;
811 if (print_insn_z80_buf (buf, info) >= 0)
812 buf->n_used++;
813 info->fprintf_func = old_fprintf;
814 info->stream = old_stream;
815
816 for (p = mybuf; *p; ++p)
817 if (*p == ' ')
818 break;
819 if (*p)
820 {
821 *p++ = '\0';
822 info->fprintf_func (info->stream, "%s.%s %s", mybuf, txt, p);
823 }
824 else
825 info->fprintf_func (info->stream, "%s.%s", mybuf, txt);
826 return buf->n_used;
827 }
828
829 /* Table to disassemble machine codes without prefix. */
830 static const struct tab_elt
831 opc_main[] =
832 {
833 { 0x00, 0xFF, prt, "nop", INSS_ALL },
834 { 0x01, 0xCF, prt_rr_nn, "ld %s,0x%%04x", INSS_ALL },
835 { 0x02, 0xFF, prt, "ld (bc),a", INSS_ALL },
836 { 0x03, 0xCF, prt_rr, "inc ", INSS_ALL },
837 { 0x04, 0xC7, prt_r, "inc %s", INSS_ALL },
838 { 0x05, 0xC7, prt_r, "dec %s", INSS_ALL },
839 { 0x06, 0xC7, ld_r_n, "ld %s,0x%%02x", INSS_ALL },
840 { 0x07, 0xFF, prt, "rlca", INSS_ALL },
841 { 0x08, 0xFF, prt, "ex af,af'", ~INSS_GBZ80 },
842 { 0x09, 0xCF, prt_rr, "add hl,", INSS_ALL },
843 { 0x0A, 0xFF, prt, "ld a,(bc)", INSS_ALL },
844 { 0x0B, 0xCF, prt_rr, "dec ", INSS_ALL },
845 { 0x0F, 0xFF, prt, "rrca", INSS_ALL },
846 { 0x10, 0xFF, prt_e, "djnz ", ~INSS_GBZ80 },
847 { 0x12, 0xFF, prt, "ld (de),a", INSS_ALL },
848 { 0x17, 0xFF, prt, "rla", INSS_ALL },
849 { 0x18, 0xFF, prt_e, "jr ", INSS_ALL },
850 { 0x1A, 0xFF, prt, "ld a,(de)", INSS_ALL },
851 { 0x1F, 0xFF, prt, "rra", INSS_ALL },
852 { 0x20, 0xE7, jr_cc, "jr %s,", INSS_ALL },
853 { 0x22, 0xFF, prt_nn, "ld (0x%04x),hl", ~INSS_GBZ80 },
854 { 0x27, 0xFF, prt, "daa", INSS_ALL },
855 { 0x2A, 0xFF, prt_nn, "ld hl,(0x%04x)", ~INSS_GBZ80 },
856 { 0x2F, 0xFF, prt, "cpl", INSS_ALL },
857 { 0x32, 0xFF, prt_nn, "ld (0x%04x),a", INSS_ALL },
858 { 0x37, 0xFF, prt, "scf", INSS_ALL },
859 { 0x3A, 0xFF, prt_nn, "ld a,(0x%04x)", INSS_ALL },
860 { 0x3F, 0xFF, prt, "ccf", INSS_ALL },
861
862 { 0x76, 0xFF, prt, "halt", INSS_ALL },
863
864 { 0x40, 0xFF, suffix, "sis", INSS_EZ80 },
865 { 0x49, 0xFF, suffix, "lis", INSS_EZ80 },
866 { 0x52, 0xFF, suffix, "sil", INSS_EZ80 },
867 { 0x5B, 0xFF, suffix, "lil", INSS_EZ80 },
868
869 { 0x40, 0xC0, ld_r_r, "ld %s,%s", INSS_ALL},
870
871 { 0x80, 0xC0, arit_r, "%s%s", INSS_ALL },
872
873 { 0xC0, 0xC7, prt_cc, "ret ", INSS_ALL },
874 { 0xC1, 0xCF, pop_rr, "pop", INSS_ALL },
875 { 0xC2, 0xC7, jp_cc_nn, "jp ", INSS_ALL },
876 { 0xC3, 0xFF, prt_nn, "jp 0x%04x", INSS_ALL },
877 { 0xC4, 0xC7, jp_cc_nn, "call ", INSS_ALL },
878 { 0xC5, 0xCF, pop_rr, "push", INSS_ALL },
879 { 0xC6, 0xC7, arit_n, "%s0x%%02x", INSS_ALL },
880 { 0xC7, 0xC7, rst, "rst 0x%02x", INSS_ALL },
881 { 0xC9, 0xFF, prt, "ret", INSS_ALL },
882 { 0xCB, 0xFF, pref_cb, "", INSS_ALL },
883 { 0xCD, 0xFF, prt_nn, "call 0x%04x", INSS_ALL },
884 { 0xD3, 0xFF, prt_n, "out (0x%02x),a", ~INSS_GBZ80 },
885 { 0xD9, 0xFF, prt, "exx", ~INSS_GBZ80 },
886 { 0xDB, 0xFF, prt_n, "in a,(0x%02x)", ~INSS_GBZ80 },
887 { 0xDD, 0xFF, pref_ind, "ix", ~INSS_GBZ80 },
888 { 0xE3, 0xFF, prt, "ex (sp),hl", ~INSS_GBZ80 },
889 { 0xE9, 0xFF, prt, "jp (hl)", INSS_ALL },
890 { 0xEB, 0xFF, prt, "ex de,hl", ~INSS_GBZ80 },
891 { 0xED, 0xFF, pref_ed, "", ~INSS_GBZ80 },
892 { 0xF3, 0xFF, prt, "di", INSS_ALL },
893 { 0xF9, 0xFF, prt, "ld sp,hl", INSS_ALL },
894 { 0xFB, 0xFF, prt, "ei", INSS_ALL },
895 { 0xFD, 0xFF, pref_ind, "iy", ~INSS_GBZ80 },
896 { 0x00, 0x00, prt, "????", INSS_ALL },
897 } ;
898
899 /* Separate GBZ80 main opcode table due to many differences */
900 static const struct tab_elt
901 opc_main_gbz80[] =
902 {
903 { 0x00, 0xFF, prt,"nop", INSS_ALL },
904 { 0x01, 0xCF, prt_rr_nn, "ld %s,0x%%04x", INSS_ALL },
905 { 0x02, 0xFF, prt, "ld (bc),a", INSS_ALL },
906 { 0x03, 0xCF, prt_rr, "inc ", INSS_ALL },
907 { 0x04, 0xC7, prt_r, "inc %s", INSS_ALL },
908 { 0x05, 0xC7, prt_r, "dec %s", INSS_ALL },
909 { 0x06, 0xC7, ld_r_n, "ld %s,0x%%02x", INSS_ALL },
910 { 0x07, 0xFF, prt, "rlca", INSS_ALL },
911 { 0x08, 0xFF, prt_nn, "ld (0x%04x),sp", INSS_GBZ80 },
912 { 0x09, 0xCF, prt_rr, "add hl,", INSS_ALL },
913 { 0x0A, 0xFF, prt, "ld a,(bc)", INSS_ALL },
914 { 0x0B, 0xCF, prt_rr, "dec ", INSS_ALL },
915 { 0x0F, 0xFF, prt, "rrca", INSS_ALL },
916 { 0x10, 0xFF, prt, "stop", INSS_GBZ80 },
917 { 0x12, 0xFF, prt, "ld (de),a", INSS_ALL },
918 { 0x17, 0xFF, prt, "rla", INSS_ALL },
919 { 0x18, 0xFF, prt_e, "jr ", INSS_ALL },
920 { 0x1A, 0xFF, prt, "ld a,(de)", INSS_ALL },
921 { 0x1F, 0xFF, prt, "rra", INSS_ALL },
922 { 0x20, 0xE7, jr_cc, "jr %s,", INSS_ALL },
923 { 0x22, 0xFF, prt, "ld (hl+),a", INSS_GBZ80 },
924 { 0x27, 0xFF, prt, "daa", INSS_ALL },
925 { 0x2A, 0xFF, prt, "ld a,(hl+)", INSS_GBZ80 },
926 { 0x2F, 0xFF, prt, "cpl", INSS_ALL },
927 { 0x32, 0xFF, prt, "ld (hl-),a", INSS_GBZ80 },
928 { 0x37, 0xFF, prt, "scf", INSS_ALL },
929 { 0x3A, 0xFF, prt, "ld a,(hl-)", INSS_GBZ80 },
930 { 0x3F, 0xFF, prt, "ccf", INSS_ALL },
931 { 0x76, 0xFF, prt, "halt", INSS_ALL },
932 { 0x40, 0xC0, ld_r_r, "ld %s,%s", INSS_ALL},
933 { 0x80, 0xC0, arit_r, "%s%s", INSS_ALL },
934 { 0xC0, 0xE7, prt_cc, "ret ", INSS_ALL },
935 { 0xC1, 0xCF, pop_rr, "pop", INSS_ALL },
936 { 0xC2, 0xE7, jp_cc_nn, "jp ", INSS_ALL },
937 { 0xC3, 0xFF, prt_nn, "jp 0x%04x", INSS_ALL },
938 { 0xC4, 0xE7, jp_cc_nn, "call ", INSS_ALL },
939 { 0xC5, 0xCF, pop_rr, "push", INSS_ALL },
940 { 0xC6, 0xC7, arit_n, "%s0x%%02x", INSS_ALL },
941 { 0xC7, 0xC7, rst, "rst 0x%02x", INSS_ALL },
942 { 0xC9, 0xFF, prt, "ret", INSS_ALL },
943 { 0xCB, 0xFF, pref_cb, "", INSS_ALL },
944 { 0xCD, 0xFF, prt_nn, "call 0x%04x", INSS_ALL },
945 { 0xD9, 0xFF, prt, "reti", INSS_GBZ80 },
946 { 0xE0, 0xFF, prt_n, "ldh (0x%02x),a", INSS_GBZ80 },
947 { 0xE2, 0xFF, prt, "ldh (c),a", INSS_GBZ80 },
948 { 0xE8, 0xFF, prt_d, "add sp,%d", INSS_GBZ80 },
949 { 0xE9, 0xFF, prt, "jp (hl)", INSS_ALL },
950 { 0xEA, 0xFF, prt_nn, "ld (0x%04x),a", INSS_GBZ80 },
951 { 0xF0, 0xFF, prt_n, "ldh a,(0x%02x)", INSS_GBZ80 },
952 { 0xF2, 0xFF, prt, "ldh a,(c)", INSS_GBZ80 },
953 { 0xF3, 0xFF, prt, "di", INSS_ALL },
954 { 0xF8, 0xFF, prt_d, "ldhl sp,%d", INSS_GBZ80 },
955 { 0xF9, 0xFF, prt, "ld sp,hl", INSS_ALL },
956 { 0xFA, 0xFF, prt_nn, "ld a,(0x%04x)", INSS_GBZ80 },
957 { 0xFB, 0xFF, prt, "ei", INSS_ALL },
958 { 0x00, 0x00, dump, "?", INSS_ALL },
959 } ;
960
961 int
print_insn_z80(bfd_vma addr,disassemble_info * info)962 print_insn_z80 (bfd_vma addr, disassemble_info * info)
963 {
964 struct buffer buf;
965
966 buf.base = addr;
967 buf.inss = 1 << info->mach;
968 buf.nn_len = info->mach == bfd_mach_ez80_adl ? 3 : 2;
969 info->bytes_per_line = (buf.inss & INSS_EZ80) ? 6 : 4; /* <ss pp oo nn mm MM> OR <pp oo nn mm> */
970
971 return print_insn_z80_buf (&buf, info);
972 }
973
974 static int
print_insn_z80_buf(struct buffer * buf,disassemble_info * info)975 print_insn_z80_buf (struct buffer *buf, disassemble_info *info)
976 {
977 const struct tab_elt *p;
978
979 buf->n_fetch = 0;
980 buf->n_used = 0;
981 if (! fetch_data (buf, info, 1))
982 return -1;
983
984 p = (buf->inss & INSS_GBZ80) ? opc_main_gbz80 : opc_main;
985
986 for (; p->val != (buf->data[0] & p->mask) || !mach_inst (buf, p); ++p)
987 ;
988 p->fp (buf, info, p->text);
989
990 return buf->n_used;
991 }
992