opcodes/z80-dis.c

   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 \f
  79 static int
  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
  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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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 \f
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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 \f
 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
 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
 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
 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
 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 }