opcodes/z80-dis.c

   1 /* Print Z80, Z180, EZ80 and R800 instructions
   2    Copyright (C) 2005-2020 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
  56 #define TXTSIZ 24
  57 /* Names of 16-bit registers.  */
  58 static const char * rr_str[] = { "bc", "de", "hl", "sp" };
  59 /* Names of 8-bit registers.  */
  60 static const char * r_str[]  = { "b", "c", "d", "e", "h", "l", "(hl)", "a" };
  61 /* Texts for condition codes.  */
  62 static const char * cc_str[] = { "nz", "z", "nc", "c", "po", "pe", "p", "m" };
  63 /* Instruction names for 8-bit arithmetic, operand "a" is often implicit */
  64 static const char * arit_str[] =
  65 {
  66   "add a,", "adc a,", "sub ", "sbc a,", "and ", "xor ", "or ", "cp "
  67 } ;
  68 static const char * arit_str_ez80[] =
  69 {
  70   "add a,", "adc a,", "sub a,", "sbc a,", "and a,", "xor a,", "or a,", "cp a,"
  71 } ;
  72
  73 \f
  74 static int
  75 mach_inst (struct buffer *buf, struct tab_elt *p)
  76 {
  77   return !p->inss || (p->inss & buf->inss);
  78 }
  79
  80 static int
  81 fetch_data (struct buffer *buf, disassemble_info * info, int n)
  82 {
  83   int r;
  84
  85   if (buf->n_fetch + n > (int)sizeof (buf->data))
  86     abort ();
  87
  88   r = info->read_memory_func (buf->base + buf->n_fetch,
  89                               (unsigned char*) buf->data + buf->n_fetch,
  90                               n, info);
  91   if (r == 0)
  92     buf->n_fetch += n;
  93   return !r;
  94 }
  95
  96 static int
  97 prt (struct buffer *buf, disassemble_info * info, const char *txt)
  98 {
  99   info->fprintf_func (info->stream, "%s", txt);
 100   buf->n_used = buf->n_fetch;
 101   return 1;
 102 }
 103
 104 static int
 105 prt_e (struct buffer *buf, disassemble_info * info, const char *txt)
 106 {
 107   char e;
 108   int target_addr;
 109
 110   if (fetch_data (buf, info, 1))
 111     {
 112       e = buf->data[1];
 113       target_addr = (buf->base + 2 + e) & 0xffff;
 114       buf->n_used = buf->n_fetch;
 115       info->fprintf_func (info->stream, "%s0x%04x", txt, target_addr);
 116     }
 117   else
 118     buf->n_used = -1;
 119
 120   return buf->n_used;
 121 }
 122
 123 static int
 124 jr_cc (struct buffer *buf, disassemble_info * info, const char *txt)
 125 {
 126   char mytxt[TXTSIZ];
 127
 128   snprintf (mytxt, TXTSIZ, txt, cc_str[(buf->data[0] >> 3) & 3]);
 129   return prt_e (buf, info, mytxt);
 130 }
 131
 132 static int
 133 prt_nn (struct buffer *buf, disassemble_info * info, const char *txt)
 134 {
 135   int nn;
 136   unsigned char *p;
 137   int i;
 138
 139   p = (unsigned char*) buf->data + buf->n_fetch;
 140   if (fetch_data (buf, info, buf->nn_len))
 141     {
 142       nn = 0;
 143       i = buf->nn_len;
 144       while (i--)
 145         nn = nn * 0x100 + p[i];
 146       info->fprintf_func (info->stream, txt, nn);
 147       buf->n_used = buf->n_fetch;
 148     }
 149   else
 150     buf->n_used = -1;
 151   return buf->n_used;
 152 }
 153
 154 static int
 155 prt_rr_nn (struct buffer *buf, disassemble_info * info, const char *txt)
 156 {
 157   char mytxt[TXTSIZ];
 158   int rr;
 159
 160   rr = (buf->data[buf->n_fetch - 1] >> 4) & 3;
 161   snprintf (mytxt, TXTSIZ, txt, rr_str[rr]);
 162   return prt_nn (buf, info, mytxt);
 163 }
 164
 165 static int
 166 prt_rr (struct buffer *buf, disassemble_info * info, const char *txt)
 167 {
 168   info->fprintf_func (info->stream, "%s%s", txt,
 169                       rr_str[(buf->data[buf->n_fetch - 1] >> 4) & 3]);
 170   buf->n_used = buf->n_fetch;
 171   return buf->n_used;
 172 }
 173
 174 static int
 175 prt_n (struct buffer *buf, disassemble_info * info, const char *txt)
 176 {
 177   int n;
 178   unsigned char *p;
 179
 180   p = (unsigned char*) buf->data + buf->n_fetch;
 181
 182   if (fetch_data (buf, info, 1))
 183     {
 184       n = p[0];
 185       info->fprintf_func (info->stream, txt, n);
 186       buf->n_used = buf->n_fetch;
 187     }
 188   else
 189     buf->n_used = -1;
 190
 191   return buf->n_used;
 192 }
 193
 194 static int
 195 prt_r_n (struct buffer *buf, disassemble_info * info, const char *txt)
 196 {
 197   char mytxt[TXTSIZ];
 198   int r;
 199
 200   r = (buf->data[buf->n_fetch - 1] >> 3) & 7;
 201   snprintf (mytxt, TXTSIZ, txt, r_str[r]);
 202   return prt_n (buf, info, mytxt);
 203 }
 204
 205 static int
 206 ld_r_n (struct buffer *buf, disassemble_info * info, const char *txt)
 207 {
 208   char mytxt[TXTSIZ];
 209
 210   snprintf (mytxt, TXTSIZ, txt, r_str[(buf->data[buf->n_fetch - 1] >> 3) & 7]);
 211   return prt_n (buf, info, mytxt);
 212 }
 213
 214 static int
 215 prt_r (struct buffer *buf, disassemble_info * info, const char *txt)
 216 {
 217   info->fprintf_func (info->stream, txt,
 218                       r_str[(buf->data[buf->n_fetch - 1] >> 3) & 7]);
 219   buf->n_used = buf->n_fetch;
 220   return buf->n_used;
 221 }
 222
 223 static int
 224 ld_r_r (struct buffer *buf, disassemble_info * info, const char *txt)
 225 {
 226   info->fprintf_func (info->stream, txt,
 227                       r_str[(buf->data[buf->n_fetch - 1] >> 3) & 7],
 228                       r_str[buf->data[buf->n_fetch - 1] & 7]);
 229   buf->n_used = buf->n_fetch;
 230   return buf->n_used;
 231 }
 232
 233 static int
 234 prt_d (struct buffer *buf, disassemble_info * info, const char *txt)
 235 {
 236   int d;
 237   signed char *p;
 238
 239   p = buf->data + buf->n_fetch;
 240
 241   if (fetch_data (buf, info, 1))
 242     {
 243       d = p[0];
 244       info->fprintf_func (info->stream, txt, d);
 245       buf->n_used = buf->n_fetch;
 246     }
 247   else
 248     buf->n_used = -1;
 249
 250   return buf->n_used;
 251 }
 252
 253 static int
 254 prt_rr_d (struct buffer *buf, disassemble_info * info, const char *txt)
 255 {
 256   char mytxt[TXTSIZ];
 257   int rr;
 258
 259   rr = (buf->data[buf->n_fetch - 1] >> 4) & 3;
 260   if (rr == 3) /* SP is not supported */
 261     return 0;
 262
 263   snprintf (mytxt, TXTSIZ, txt, rr_str[rr]);
 264   return prt_d (buf, info, mytxt);
 265 }
 266
 267 static int
 268 arit_r (struct buffer *buf, disassemble_info * info, const char *txt)
 269 {
 270   const char * const *arit;
 271   arit = (buf->inss & INSS_EZ80) ? arit_str_ez80 : arit_str;
 272   info->fprintf_func (info->stream, txt,
 273                       arit[(buf->data[buf->n_fetch - 1] >> 3) & 7],
 274                       r_str[buf->data[buf->n_fetch - 1] & 7]);
 275   buf->n_used = buf->n_fetch;
 276   return buf->n_used;
 277 }
 278
 279 static int
 280 prt_cc (struct buffer *buf, disassemble_info * info, const char *txt)
 281 {
 282   info->fprintf_func (info->stream, "%s%s", txt,
 283                       cc_str[(buf->data[0] >> 3) & 7]);
 284   buf->n_used = buf->n_fetch;
 285   return buf->n_used;
 286 }
 287
 288 static int
 289 pop_rr (struct buffer *buf, disassemble_info * info, const char *txt)
 290 {
 291   static char *rr_stack[] = { "bc","de","hl","af"};
 292
 293   info->fprintf_func (info->stream, "%s %s", txt,
 294                       rr_stack[(buf->data[0] >> 4) & 3]);
 295   buf->n_used = buf->n_fetch;
 296   return buf->n_used;
 297 }
 298
 299
 300 static int
 301 jp_cc_nn (struct buffer *buf, disassemble_info * info, const char *txt)
 302 {
 303   char mytxt[TXTSIZ];
 304
 305   snprintf (mytxt,TXTSIZ,
 306             "%s%s,0x%%04x", txt, cc_str[(buf->data[0] >> 3) & 7]);
 307   return prt_nn (buf, info, mytxt);
 308 }
 309
 310 static int
 311 arit_n (struct buffer *buf, disassemble_info * info, const char *txt)
 312 {
 313   char mytxt[TXTSIZ];
 314   const char * const *arit;
 315
 316   arit = (buf->inss & INSS_EZ80) ? arit_str_ez80 : arit_str;
 317   snprintf (mytxt,TXTSIZ, txt, arit[(buf->data[0] >> 3) & 7]);
 318   return prt_n (buf, info, mytxt);
 319 }
 320
 321 static int
 322 rst (struct buffer *buf, disassemble_info * info, const char *txt)
 323 {
 324   info->fprintf_func (info->stream, txt, buf->data[0] & 0x38);
 325   buf->n_used = buf->n_fetch;
 326   return buf->n_used;
 327 }
 328
 329 \f
 330 static int
 331 cis (struct buffer *buf, disassemble_info * info, const char *txt ATTRIBUTE_UNUSED)
 332 {
 333   static char * opar[] = { "ld", "cp", "in", "out" };
 334   char * op;
 335   char c;
 336
 337   c = buf->data[1];
 338   op = ((0x13 & c) == 0x13) ? "ot" : (opar[c & 3]);
 339   info->fprintf_func (info->stream,
 340                       "%s%c%s", op,
 341                       (c & 0x08) ? 'd' : 'i',
 342                       (c & 0x10) ? "r" : "");
 343   buf->n_used = 2;
 344   return buf->n_used;
 345 }
 346
 347 static int
 348 cism (struct buffer *buf, disassemble_info * info, const char *txt ATTRIBUTE_UNUSED)
 349 {
 350   static char * opar[] = { "in%cm%s", "ot%cm%s" };
 351   char * op;
 352   char c;
 353
 354   c = buf->data[1];
 355   op = opar[c & 1];
 356   info->fprintf_func (info->stream,
 357                       op,
 358                       (c & 0x08) ? 'd' : 'i',
 359                       (c & 0x10) ? "r" : "");
 360   buf->n_used = 2;
 361   return buf->n_used;
 362 }
 363
 364 static int
 365 cis2 (struct buffer *buf, disassemble_info * info, const char *txt ATTRIBUTE_UNUSED)
 366 {
 367   static char * opar[] = { "in", "out" };
 368   char * op;
 369   char c;
 370
 371   c = buf->data[1];
 372   op = ((0x14 & c) == 0x14) ? "ot" : (opar[c & 1]);
 373   info->fprintf_func (info->stream,
 374                       "%s%c2%s",
 375                       op,
 376                       (c & 0x08) ? 'd' : 'i',
 377                       (c & 0x10) ? "r" : "");
 378   buf->n_used = 2;
 379   return buf->n_used;
 380 }
 381
 382 static int
 383 dump (struct buffer *buf, disassemble_info * info, const char *txt)
 384 {
 385   int i;
 386
 387   info->fprintf_func (info->stream, "defb ");
 388   for (i = 0; txt[i]; ++i)
 389     info->fprintf_func (info->stream, i ? ", 0x%02x" : "0x%02x",
 390                         (unsigned char) buf->data[i]);
 391   buf->n_used = i;
 392   return buf->n_used;
 393 }
 394 \f
 395 /* Table to disassemble machine codes with prefix 0xED.  */
 396 struct tab_elt opc_ed[] =
 397 {
 398   { 0x30, 0xFE, dump, "xx", INSS_ALL },
 399   { 0x00, 0xC7, prt_r_n, "in0 %s,(0x%%02x)", INSS_Z180|INSS_EZ80 },
 400   { 0x01, 0xC7, prt_r_n, "out0 (0x%%02x),%s", INSS_Z180|INSS_EZ80 },
 401   { 0x32, 0xFF, prt_d, "lea ix,ix%+d", INSS_EZ80 },
 402   { 0x33, 0xFF, prt_d, "lea iy,iy%+d", INSS_EZ80 },
 403   { 0x02, 0xCF, prt_rr_d, "lea %s,ix%%+d", INSS_EZ80 },
 404   { 0x03, 0xCF, prt_rr_d, "lea %s,iy%%+d", INSS_EZ80 },
 405   { 0x04, 0xC7, prt_r, "tst %s", INSS_Z180},
 406   { 0x04, 0xC7, prt_r, "tst a,%s", INSS_EZ80 },
 407   { 0x07, 0xFF, prt, "ld bc,(hl)", INSS_EZ80 },
 408   { 0x0F, 0xCF, prt_rr, "ld (hl),", INSS_EZ80 },
 409   { 0x17, 0xFF, prt, "ld de,(hl)", INSS_EZ80 },
 410   { 0x27, 0xFF, prt, "ld hl,(hl)", INSS_EZ80 },
 411   { 0x36, 0xFF, prt, "ld iy,(hl)", INSS_EZ80 },
 412   { 0x37, 0xFF, prt, "ld ix,(hl)", INSS_EZ80 },
 413   { 0x3E, 0xFF, prt, "ld (hl),iy", INSS_EZ80 },
 414   { 0x3F, 0xFF, prt, "ld (hl),ix", INSS_EZ80 },
 415   { 0x70, 0xFF, prt, "in f,(c)", INSS_Z80 | INSS_R800 },
 416   { 0x70, 0xFF, dump, "xx", INSS_ALL },
 417   { 0x40, 0xC7, prt_r, "in %s,(bc)", INSS_EZ80 },
 418   { 0x40, 0xC7, prt_r, "in %s,(c)", INSS_ALL },
 419   { 0x71, 0xFF, prt, "out (c),0", INSS_Z80 },
 420   { 0x70, 0xFF, dump, "xx", INSS_ALL },
 421   { 0x41, 0xC7, prt_r, "out (bc),%s", INSS_EZ80 },
 422   { 0x41, 0xC7, prt_r, "out (c),%s", INSS_ALL },
 423   { 0x42, 0xCF, prt_rr, "sbc hl,", INSS_ALL },
 424   { 0x43, 0xCF, prt_rr_nn, "ld (0x%%04x),%s", INSS_ALL },
 425   { 0x44, 0xFF, prt, "neg", INSS_ALL },
 426   { 0x45, 0xFF, prt, "retn", INSS_ALL },
 427   { 0x46, 0xFF, prt, "im 0", INSS_ALL },
 428   { 0x47, 0xFF, prt, "ld i,a", INSS_ALL },
 429   { 0x4A, 0xCF, prt_rr, "adc hl,", INSS_ALL },
 430   { 0x4B, 0xCF, prt_rr_nn, "ld %s,(0x%%04x)", INSS_ALL },
 431   { 0x4C, 0xCF, prt_rr, "mlt ", INSS_Z180|INSS_EZ80 },
 432   { 0x4D, 0xFF, prt, "reti", INSS_ALL },
 433   { 0x4F, 0xFF, prt, "ld r,a", INSS_ALL },
 434   { 0x54, 0xFF, prt_d, "lea ix,iy%+d", INSS_EZ80 },
 435   { 0x55, 0xFF, prt_d, "lea iy,ix%+d", INSS_EZ80 },
 436   { 0x56, 0xFF, prt, "im 1", INSS_ALL },
 437   { 0x57, 0xFF, prt, "ld a,i", INSS_ALL },
 438   { 0x5E, 0xFF, prt, "im 2", INSS_ALL },
 439   { 0x5F, 0xFF, prt, "ld a,r", INSS_ALL },
 440   { 0x64, 0xFF, prt_n, "tst 0x%02x", INSS_Z180 },
 441   { 0x64, 0xFF, prt_n, "tst a,0x%02x", INSS_EZ80 },
 442   { 0x65, 0xFF, prt_d, "pea ix%+d", INSS_EZ80 },
 443   { 0x66, 0xFF, prt_d, "pea iy%+d", INSS_EZ80 },
 444   { 0x67, 0xFF, prt, "rrd", INSS_ALL },
 445   { 0x6F, 0xFF, prt, "rld", INSS_ALL },
 446   { 0x74, 0xFF, prt_n, "tstio 0x%02x", INSS_Z180|INSS_EZ80 },
 447   { 0x76, 0xFF, prt, "slp", INSS_Z180|INSS_EZ80 },
 448   { 0x82, 0xE6, cism, "", INSS_Z180|INSS_EZ80 },
 449   { 0x84, 0xC7, cis2, "", INSS_EZ80 },
 450   { 0xA0, 0xE4, cis, "", INSS_ALL },
 451   { 0x7D, 0xFF, prt, "stmix", INSS_EZ80 },
 452   { 0x7E, 0xFF, prt, "rsmix", INSS_EZ80 },
 453   { 0x6D, 0xFF, prt, "ld mb,a", INSS_EZ80 },
 454   { 0x6E, 0xFF, prt, "ld a,mb", INSS_EZ80 },
 455   { 0xC7, 0xFF, prt, "ld i,hl", INSS_EZ80 },
 456   { 0xD7, 0xFF, prt, "ld hl,i", INSS_EZ80 },
 457   { 0xC2, 0xFF, prt, "inirx", INSS_EZ80 },
 458   { 0xC3, 0xFF, prt, "otirx", INSS_EZ80 },
 459   { 0xCA, 0xFF, prt, "indrx", INSS_EZ80 },
 460   { 0xCB, 0xFF, prt, "otdrx", INSS_EZ80 },
 461   { 0xC3, 0xFF, prt, "muluw hl,bc", INSS_R800 },
 462   { 0xC5, 0xE7, prt_r, "mulub a,%s", INSS_R800 },
 463   { 0xF3, 0xFF, prt, "muluw hl,sp", INSS_R800 },
 464   { 0x00, 0x00, dump, "xx", INSS_ALL }
 465 };
 466
 467 static int
 468 pref_ed (struct buffer *buf, disassemble_info *info,
 469          const char *txt ATTRIBUTE_UNUSED)
 470 {
 471   struct tab_elt *p;
 472
 473   if (fetch_data (buf, info, 1))
 474     {
 475       for (p = opc_ed; p->val != (buf->data[1] & p->mask) || !mach_inst (buf, p); ++p)
 476         ;
 477       p->fp (buf, info, p->text);
 478     }
 479   else
 480     buf->n_used = -1;
 481
 482   return buf->n_used;
 483 }
 484 \f
 485 /* Instruction names for the instructions addressing single bits.  */
 486 static char *cb1_str[] = { "", "bit", "res", "set"};
 487 /* Instruction names for shifts and rotates.  */
 488 static char *cb2_str[] =
 489 {
 490   "rlc", "rrc", "rl", "rr", "sla", "sra", "sli", "srl"
 491 };
 492
 493 static int
 494 pref_cb (struct buffer *buf, disassemble_info *info,
 495          const char *txt ATTRIBUTE_UNUSED)
 496 {
 497   const char *op_txt;
 498   int idx;
 499   if (fetch_data (buf, info, 1))
 500     {
 501       buf->n_used = 2;
 502       if ((buf->data[1] & 0xc0) == 0)
 503         {
 504           idx = (buf->data[1] >> 3) & 7;
 505           if ((buf->inss & INSS_GBZ80) && (idx == 6))
 506             op_txt = "swap";
 507           else
 508             op_txt = cb2_str[idx];
 509           info->fprintf_func (info->stream, "%s %s",
 510                               op_txt,
 511                               r_str[buf->data[1] & 7]);
 512         }
 513       else
 514         info->fprintf_func (info->stream, "%s %d,%s",
 515                             cb1_str[(buf->data[1] >> 6) & 3],
 516                             (buf->data[1] >> 3) & 7,
 517                             r_str[buf->data[1] & 7]);
 518     }
 519   else
 520     buf->n_used = -1;
 521
 522   return buf->n_used;
 523 }
 524 \f
 525 static int
 526 addvv (struct buffer * buf, disassemble_info * info, const char *txt)
 527 {
 528   info->fprintf_func (info->stream, "add %s,%s", txt, txt);
 529
 530   return buf->n_used = buf->n_fetch;
 531 }
 532
 533 static int
 534 ld_v_v (struct buffer * buf, disassemble_info * info, const char *txt)
 535 {
 536   char mytxt[TXTSIZ];
 537
 538   snprintf (mytxt, TXTSIZ, "ld %s%%s,%s%%s", txt, txt);
 539   return ld_r_r (buf, info, mytxt);
 540 }
 541
 542 static int
 543 prt_d_n (struct buffer *buf, disassemble_info * info, const char *txt)
 544 {
 545   char mytxt[TXTSIZ];
 546   int d;
 547   signed char *p;
 548
 549   p = buf->data + buf->n_fetch;
 550
 551   if (fetch_data (buf, info, 1))
 552     {
 553       d = p[0];
 554       snprintf (mytxt, TXTSIZ, txt, d);
 555       return prt_n (buf, info, mytxt);
 556     }
 557   else
 558     buf->n_used = -1;
 559
 560   return buf->n_used;
 561 }
 562
 563 static int
 564 arit_d (struct buffer *buf, disassemble_info * info, const char *txt)
 565 {
 566   char mytxt[TXTSIZ];
 567   signed char c;
 568   const char * const *arit;
 569
 570   arit = (buf->inss & INSS_EZ80) ? arit_str_ez80 : arit_str;
 571   c = buf->data[buf->n_fetch - 1];
 572   snprintf (mytxt, TXTSIZ, txt, arit[(c >> 3) & 7]);
 573   return prt_d (buf, info, mytxt);
 574 }
 575
 576 static int
 577 ld_r_d (struct buffer *buf, disassemble_info * info, const char *txt)
 578 {
 579   char mytxt[TXTSIZ];
 580   signed char c;
 581
 582   c = buf->data[buf->n_fetch - 1];
 583   snprintf (mytxt, TXTSIZ, txt, r_str[(c >> 3) & 7]);
 584   return prt_d (buf, info, mytxt);
 585 }
 586
 587 static int
 588 ld_d_r (struct buffer *buf, disassemble_info * info, const char *txt)
 589 {
 590   char mytxt[TXTSIZ];
 591   signed char c;
 592
 593   c = buf->data[buf->n_fetch - 1];
 594   snprintf (mytxt, TXTSIZ, txt, r_str[c & 7]);
 595   return prt_d (buf, info, mytxt);
 596 }
 597
 598 static int
 599 ld_ii_ii (struct buffer *buf, disassemble_info * info, const char *txt)
 600 {
 601   char mytxt[TXTSIZ];
 602   signed char c;
 603   int p;
 604   static const char *ii[2] = { "ix", "iy" };
 605
 606   p = (buf->data[buf->n_fetch - 2] == (char) 0xdd) ? 0 : 1;
 607   c = buf->data[buf->n_fetch - 1];
 608   if ((c & 0x07) != 0x07)
 609     p = 1 - p; /* 0 -> 1, 1 -> 0 */
 610   snprintf (mytxt, TXTSIZ, txt, ii[p]);
 611   return prt_d (buf, info, mytxt);
 612 }
 613
 614 static int
 615 pref_xd_cb (struct buffer * buf, disassemble_info * info, const char *txt)
 616 {
 617   if (fetch_data (buf, info, 2))
 618     {
 619       int d;
 620       char arg[TXTSIZ];
 621       signed char *p;
 622
 623       buf->n_used = 4;
 624       p = buf->data;
 625       d = p[2];
 626
 627       if (((p[3] & 0xC0) == 0x40) || ((p[3] & 7) == 0x06))
 628         snprintf (arg, TXTSIZ, "(%s%+d)", txt, d);
 629       else
 630         snprintf (arg, TXTSIZ, "(%s%+d),%s", txt, d, r_str[p[3] & 7]);
 631
 632       if ((p[3] & 0xc0) == 0)
 633         info->fprintf_func (info->stream, "%s %s",
 634                             cb2_str[(buf->data[3] >> 3) & 7],
 635                             arg);
 636       else
 637         info->fprintf_func (info->stream, "%s %d,%s",
 638                             cb1_str[(buf->data[3] >> 6) & 3],
 639                             (buf->data[3] >> 3) & 7,
 640                             arg);
 641     }
 642   else
 643     buf->n_used = -1;
 644
 645   return buf->n_used;
 646 }
 647 \f
 648 /* Table to disassemble machine codes with prefix 0xDD or 0xFD.  */
 649 static struct tab_elt opc_ind[] =
 650 {
 651   { 0x07, 0xFF, prt_d, "ld bc,(%s%%+d)", INSS_EZ80 },
 652   { 0x0F, 0xFF, prt_d, "ld (%s%%+d),bc", INSS_EZ80 },
 653   { 0x17, 0xFF, prt_d, "ld de,(%s%%+d)", INSS_EZ80 },
 654   { 0x1F, 0xFF, prt_d, "ld (%s%%+d),de", INSS_EZ80 },
 655   { 0x24, 0xF7, prt_r, "inc %s%%s", INSS_ALL },
 656   { 0x25, 0xF7, prt_r, "dec %s%%s", INSS_ALL },
 657   { 0x26, 0xF7, ld_r_n, "ld %s%%s,0x%%%%02x", INSS_ALL },
 658   { 0x27, 0xFF, prt_d, "ld hl,(%s%%+d)", INSS_EZ80 },
 659   { 0x2F, 0xFF, prt_d, "ld (%s%%+d),hl", INSS_EZ80 },
 660   { 0x21, 0xFF, prt_nn, "ld %s,0x%%04x", INSS_ALL },
 661   { 0x22, 0xFF, prt_nn, "ld (0x%%04x),%s", INSS_ALL },
 662   { 0x2A, 0xFF, prt_nn, "ld %s,(0x%%04x)", INSS_ALL },
 663   { 0x23, 0xFF, prt, "inc %s", INSS_ALL },
 664   { 0x2B, 0xFF, prt, "dec %s", INSS_ALL },
 665   { 0x29, 0xFF, addvv, "%s", INSS_ALL },
 666   { 0x31, 0xFF, ld_ii_ii, "ld %%s,(%s%%%%+d)", INSS_EZ80 },
 667   { 0x37, 0xFF, ld_ii_ii, "ld %%s,(%s%%%%+d)", INSS_EZ80 },
 668   { 0x3E, 0xFE, ld_ii_ii, "ld (%s%%%%+d),%%s", INSS_EZ80 },
 669   { 0x09, 0xCF, prt_rr, "add %s,", INSS_ALL },
 670   { 0x34, 0xFF, prt_d, "inc (%s%%+d)", INSS_ALL },
 671   { 0x35, 0xFF, prt_d, "dec (%s%%+d)", INSS_ALL },
 672   { 0x36, 0xFF, prt_d_n, "ld (%s%%+d),0x%%%%02x", INSS_ALL },
 673
 674   { 0x76, 0xFF, dump, "h", INSS_ALL },
 675   { 0x46, 0xC7, ld_r_d, "ld %%s,(%s%%%%+d)", INSS_ALL },
 676   { 0x70, 0xF8, ld_d_r, "ld (%s%%%%+d),%%s", INSS_ALL },
 677   { 0x64, 0xF6, ld_v_v, "%s", INSS_ALL },
 678   { 0x60, 0xF0, ld_r_r, "ld %s%%s,%%s", INSS_ALL },
 679   { 0x44, 0xC6, ld_r_r, "ld %%s,%s%%s", INSS_ALL },
 680
 681   { 0x86, 0xC7, arit_d, "%%s(%s%%%%+d)", INSS_ALL },
 682   { 0x84, 0xC6, arit_r, "%%s%s%%s", INSS_ALL },
 683
 684   { 0xE1, 0xFF, prt, "pop %s", INSS_ALL },
 685   { 0xE5, 0xFF, prt, "push %s", INSS_ALL },
 686   { 0xCB, 0xFF, pref_xd_cb, "%s", INSS_ALL },
 687   { 0xE3, 0xFF, prt, "ex (sp),%s", INSS_ALL },
 688   { 0xE9, 0xFF, prt, "jp (%s)", INSS_ALL },
 689   { 0xF9, 0xFF, prt, "ld sp,%s", INSS_ALL },
 690   { 0x00, 0x00, dump, "?", INSS_ALL },
 691 } ;
 692
 693 static int
 694 pref_ind (struct buffer *buf, disassemble_info *info, const char *txt)
 695 {
 696   if (fetch_data (buf, info, 1))
 697     {
 698       char mytxt[TXTSIZ];
 699       struct tab_elt *p;
 700
 701       for (p = opc_ind; p->val != (buf->data[1] & p->mask) || !mach_inst (buf, p); ++p)
 702         ;
 703       snprintf (mytxt, TXTSIZ, p->text, txt);
 704       p->fp (buf, info, mytxt);
 705     }
 706   else
 707     buf->n_used = -1;
 708
 709   return buf->n_used;
 710 }
 711
 712 static int
 713 print_insn_z80_buf (struct buffer *buf, disassemble_info *info);
 714
 715 static int
 716 suffix (struct buffer *buf, disassemble_info *info, const char *txt)
 717 {
 718   char mybuf[TXTSIZ*4];
 719   fprintf_ftype old_fprintf;
 720   void *old_stream;
 721   char *p;
 722
 723   switch (txt[2])
 724     {
 725     case 'l': /* SIL or LIL */
 726       buf->nn_len = 3;
 727       break;
 728     case 's': /* SIS or LIS */
 729       buf->nn_len = 2;
 730       break;
 731     default:
 732       abort ();
 733     }
 734   if (!fetch_data (buf, info, 1)
 735       || buf->data[1] == 0x40
 736       || buf->data[1] == 0x49
 737       || buf->data[1] == 0x52
 738       || buf->data[1] == 0x5b)
 739     {
 740       /* Double prefix, or end of data.  */
 741       info->fprintf_func (info->stream, "nop ;%s", txt);
 742       buf->n_used = 1;
 743       return buf->n_used;
 744     }
 745
 746   old_fprintf = info->fprintf_func;
 747   old_stream = info->stream;
 748   info->fprintf_func = (fprintf_ftype) &sprintf;
 749   info->stream = mybuf;
 750   buf->base++;
 751   if (print_insn_z80_buf (buf, info) >= 0)
 752     buf->n_used++;
 753   info->fprintf_func = old_fprintf;
 754   info->stream = old_stream;
 755
 756   for (p = mybuf; *p; ++p)
 757     if (*p == ' ')
 758       break;
 759   if (*p)
 760     {
 761       *p++ = '\0';
 762       info->fprintf_func (info->stream, "%s.%s %s", mybuf, txt, p);
 763     }
 764   else
 765     info->fprintf_func (info->stream, "%s.%s", mybuf, txt);
 766   return buf->n_used;
 767 }
 768
 769 /* Table to disassemble machine codes without prefix.  */
 770 static struct tab_elt opc_main[] =
 771 {
 772   { 0x00, 0xFF, prt, "nop", INSS_ALL },
 773   { 0x01, 0xCF, prt_rr_nn, "ld %s,0x%%04x", INSS_ALL },
 774   { 0x02, 0xFF, prt, "ld (bc),a", INSS_ALL },
 775   { 0x03, 0xCF, prt_rr, "inc ", INSS_ALL },
 776   { 0x04, 0xC7, prt_r, "inc %s", INSS_ALL },
 777   { 0x05, 0xC7, prt_r, "dec %s", INSS_ALL },
 778   { 0x06, 0xC7, ld_r_n, "ld %s,0x%%02x", INSS_ALL },
 779   { 0x07, 0xFF, prt, "rlca", INSS_ALL },
 780   { 0x08, 0xFF, prt, "ex af,af'", ~INSS_GBZ80 },
 781   { 0x09, 0xCF, prt_rr, "add hl,", INSS_ALL },
 782   { 0x0A, 0xFF, prt, "ld a,(bc)", INSS_ALL },
 783   { 0x0B, 0xCF, prt_rr, "dec ", INSS_ALL },
 784   { 0x0F, 0xFF, prt, "rrca", INSS_ALL },
 785   { 0x10, 0xFF, prt_e, "djnz ", ~INSS_GBZ80 },
 786   { 0x12, 0xFF, prt, "ld (de),a", INSS_ALL },
 787   { 0x17, 0xFF, prt, "rla", INSS_ALL },
 788   { 0x18, 0xFF, prt_e, "jr ", INSS_ALL },
 789   { 0x1A, 0xFF, prt, "ld a,(de)", INSS_ALL },
 790   { 0x1F, 0xFF, prt, "rra", INSS_ALL },
 791   { 0x20, 0xE7, jr_cc, "jr %s,", INSS_ALL },
 792   { 0x22, 0xFF, prt_nn, "ld (0x%04x),hl", ~INSS_GBZ80 },
 793   { 0x27, 0xFF, prt, "daa", INSS_ALL },
 794   { 0x2A, 0xFF, prt_nn, "ld hl,(0x%04x)", ~INSS_GBZ80 },
 795   { 0x2F, 0xFF, prt, "cpl", INSS_ALL },
 796   { 0x32, 0xFF, prt_nn, "ld (0x%04x),a", INSS_ALL },
 797   { 0x37, 0xFF, prt, "scf", INSS_ALL },
 798   { 0x3A, 0xFF, prt_nn, "ld a,(0x%04x)", INSS_ALL },
 799   { 0x3F, 0xFF, prt, "ccf", INSS_ALL },
 800
 801   { 0x76, 0xFF, prt, "halt", INSS_ALL },
 802
 803   { 0x40, 0xFF, suffix, "sis", INSS_EZ80 },
 804   { 0x49, 0xFF, suffix, "lis", INSS_EZ80 },
 805   { 0x52, 0xFF, suffix, "sil", INSS_EZ80 },
 806   { 0x5B, 0xFF, suffix, "lil", INSS_EZ80 },
 807
 808   { 0x40, 0xC0, ld_r_r, "ld %s,%s", INSS_ALL},
 809
 810   { 0x80, 0xC0, arit_r, "%s%s", INSS_ALL },
 811
 812   { 0xC0, 0xC7, prt_cc, "ret ", INSS_ALL },
 813   { 0xC1, 0xCF, pop_rr, "pop", INSS_ALL },
 814   { 0xC2, 0xC7, jp_cc_nn, "jp ", INSS_ALL },
 815   { 0xC3, 0xFF, prt_nn, "jp 0x%04x", INSS_ALL },
 816   { 0xC4, 0xC7, jp_cc_nn, "call ", INSS_ALL },
 817   { 0xC5, 0xCF, pop_rr, "push", INSS_ALL },
 818   { 0xC6, 0xC7, arit_n, "%s0x%%02x", INSS_ALL },
 819   { 0xC7, 0xC7, rst, "rst 0x%02x", INSS_ALL },
 820   { 0xC9, 0xFF, prt, "ret", INSS_ALL },
 821   { 0xCB, 0xFF, pref_cb, "", INSS_ALL },
 822   { 0xCD, 0xFF, prt_nn, "call 0x%04x", INSS_ALL },
 823   { 0xD3, 0xFF, prt_n, "out (0x%02x),a", ~INSS_GBZ80 },
 824   { 0xD9, 0xFF, prt, "exx", ~INSS_GBZ80 },
 825   { 0xDB, 0xFF, prt_n, "in a,(0x%02x)", ~INSS_GBZ80 },
 826   { 0xDD, 0xFF, pref_ind, "ix", ~INSS_GBZ80 },
 827   { 0xE3, 0xFF, prt, "ex (sp),hl", ~INSS_GBZ80 },
 828   { 0xE9, 0xFF, prt, "jp (hl)", INSS_ALL },
 829   { 0xEB, 0xFF, prt, "ex de,hl", ~INSS_GBZ80 },
 830   { 0xED, 0xFF, pref_ed, "", ~INSS_GBZ80 },
 831   { 0xF3, 0xFF, prt, "di", INSS_ALL },
 832   { 0xF9, 0xFF, prt, "ld sp,hl", ~INSS_GBZ80 },
 833   { 0xFB, 0xFF, prt, "ei", INSS_ALL },
 834   { 0xFD, 0xFF, pref_ind, "iy", ~INSS_GBZ80 },
 835   { 0x00, 0x00, prt, "????", INSS_ALL },
 836 } ;
 837
 838 int
 839 print_insn_z80 (bfd_vma addr, disassemble_info * info)
 840 {
 841   struct buffer buf;
 842
 843   buf.base = addr;
 844   buf.inss = 1 << info->mach;
 845   buf.nn_len = info->mach == bfd_mach_ez80_adl ? 3 : 2;
 846   info->bytes_per_line = (buf.inss & INSS_EZ80) ? 6 : 4; /* <ss pp oo nn mm MM> OR <pp oo nn mm> */
 847
 848   return print_insn_z80_buf (&buf, info);
 849 }
 850
 851 static int
 852 print_insn_z80_buf (struct buffer *buf, disassemble_info *info)
 853 {
 854   struct tab_elt *p;
 855
 856   buf->n_fetch = 0;
 857   buf->n_used = 0;
 858   if (! fetch_data (buf, info, 1))
 859     return -1;
 860
 861   for (p = opc_main; p->val != (buf->data[0] & p->mask) || !mach_inst (buf, p); ++p)
 862     ;
 863   p->fp (buf, info, p->text);
 864
 865   return buf->n_used;
 866 }