| 1 | /* tc-z80.c -- Assemble code for the Zilog Z80 and ASCII R800 |
| 2 | Copyright (C) 2005-2019 Free Software Foundation, Inc. |
| 3 | Contributed by Arnold Metselaar <arnold_m@operamail.com> |
| 4 | |
| 5 | This file is part of GAS, the GNU Assembler. |
| 6 | |
| 7 | GAS 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 | GAS is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GAS; see the file COPYING. If not, write to the Free |
| 19 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
| 20 | 02110-1301, USA. */ |
| 21 | |
| 22 | #include "as.h" |
| 23 | #include "safe-ctype.h" |
| 24 | #include "subsegs.h" |
| 25 | |
| 26 | /* Exported constants. */ |
| 27 | const char comment_chars[] = ";\0"; |
| 28 | const char line_comment_chars[] = "#;\0"; |
| 29 | const char line_separator_chars[] = "\0"; |
| 30 | const char EXP_CHARS[] = "eE\0"; |
| 31 | const char FLT_CHARS[] = "RrFf\0"; |
| 32 | |
| 33 | /* For machine specific options. */ |
| 34 | const char * md_shortopts = ""; /* None yet. */ |
| 35 | |
| 36 | enum options |
| 37 | { |
| 38 | OPTION_MACH_Z80 = OPTION_MD_BASE, |
| 39 | OPTION_MACH_R800, |
| 40 | OPTION_MACH_IUD, |
| 41 | OPTION_MACH_WUD, |
| 42 | OPTION_MACH_FUD, |
| 43 | OPTION_MACH_IUP, |
| 44 | OPTION_MACH_WUP, |
| 45 | OPTION_MACH_FUP |
| 46 | }; |
| 47 | |
| 48 | #define INS_Z80 1 |
| 49 | #define INS_UNDOC 2 |
| 50 | #define INS_UNPORT 4 |
| 51 | #define INS_R800 8 |
| 52 | |
| 53 | struct option md_longopts[] = |
| 54 | { |
| 55 | { "z80", no_argument, NULL, OPTION_MACH_Z80}, |
| 56 | { "r800", no_argument, NULL, OPTION_MACH_R800}, |
| 57 | { "ignore-undocumented-instructions", no_argument, NULL, OPTION_MACH_IUD }, |
| 58 | { "Wnud", no_argument, NULL, OPTION_MACH_IUD }, |
| 59 | { "warn-undocumented-instructions", no_argument, NULL, OPTION_MACH_WUD }, |
| 60 | { "Wud", no_argument, NULL, OPTION_MACH_WUD }, |
| 61 | { "forbid-undocumented-instructions", no_argument, NULL, OPTION_MACH_FUD }, |
| 62 | { "Fud", no_argument, NULL, OPTION_MACH_FUD }, |
| 63 | { "ignore-unportable-instructions", no_argument, NULL, OPTION_MACH_IUP }, |
| 64 | { "Wnup", no_argument, NULL, OPTION_MACH_IUP }, |
| 65 | { "warn-unportable-instructions", no_argument, NULL, OPTION_MACH_WUP }, |
| 66 | { "Wup", no_argument, NULL, OPTION_MACH_WUP }, |
| 67 | { "forbid-unportable-instructions", no_argument, NULL, OPTION_MACH_FUP }, |
| 68 | { "Fup", no_argument, NULL, OPTION_MACH_FUP }, |
| 69 | |
| 70 | { NULL, no_argument, NULL, 0 } |
| 71 | } ; |
| 72 | |
| 73 | size_t md_longopts_size = sizeof (md_longopts); |
| 74 | |
| 75 | extern int coff_flags; |
| 76 | /* Instruction classes that silently assembled. */ |
| 77 | static int ins_ok = INS_Z80 | INS_UNDOC; |
| 78 | /* Instruction classes that generate errors. */ |
| 79 | static int ins_err = INS_R800; |
| 80 | /* Instruction classes actually used, determines machine type. */ |
| 81 | static int ins_used = INS_Z80; |
| 82 | |
| 83 | int |
| 84 | md_parse_option (int c, const char* arg ATTRIBUTE_UNUSED) |
| 85 | { |
| 86 | switch (c) |
| 87 | { |
| 88 | default: |
| 89 | return 0; |
| 90 | case OPTION_MACH_Z80: |
| 91 | ins_ok &= ~INS_R800; |
| 92 | ins_err |= INS_R800; |
| 93 | break; |
| 94 | case OPTION_MACH_R800: |
| 95 | ins_ok = INS_Z80 | INS_UNDOC | INS_R800; |
| 96 | ins_err = INS_UNPORT; |
| 97 | break; |
| 98 | case OPTION_MACH_IUD: |
| 99 | ins_ok |= INS_UNDOC; |
| 100 | ins_err &= ~INS_UNDOC; |
| 101 | break; |
| 102 | case OPTION_MACH_IUP: |
| 103 | ins_ok |= INS_UNDOC | INS_UNPORT; |
| 104 | ins_err &= ~(INS_UNDOC | INS_UNPORT); |
| 105 | break; |
| 106 | case OPTION_MACH_WUD: |
| 107 | if ((ins_ok & INS_R800) == 0) |
| 108 | { |
| 109 | ins_ok &= ~(INS_UNDOC|INS_UNPORT); |
| 110 | ins_err &= ~INS_UNDOC; |
| 111 | } |
| 112 | break; |
| 113 | case OPTION_MACH_WUP: |
| 114 | ins_ok &= ~INS_UNPORT; |
| 115 | ins_err &= ~(INS_UNDOC|INS_UNPORT); |
| 116 | break; |
| 117 | case OPTION_MACH_FUD: |
| 118 | if ((ins_ok & INS_R800) == 0) |
| 119 | { |
| 120 | ins_ok &= (INS_UNDOC | INS_UNPORT); |
| 121 | ins_err |= INS_UNDOC | INS_UNPORT; |
| 122 | } |
| 123 | break; |
| 124 | case OPTION_MACH_FUP: |
| 125 | ins_ok &= ~INS_UNPORT; |
| 126 | ins_err |= INS_UNPORT; |
| 127 | break; |
| 128 | } |
| 129 | |
| 130 | return 1; |
| 131 | } |
| 132 | |
| 133 | void |
| 134 | md_show_usage (FILE * f) |
| 135 | { |
| 136 | fprintf (f, "\n\ |
| 137 | CPU model/instruction set options:\n\ |
| 138 | \n\ |
| 139 | -z80\t\t assemble for Z80\n\ |
| 140 | -ignore-undocumented-instructions\n\ |
| 141 | -Wnud\n\ |
| 142 | \tsilently assemble undocumented Z80-instructions that work on R800\n\ |
| 143 | -ignore-unportable-instructions\n\ |
| 144 | -Wnup\n\ |
| 145 | \tsilently assemble all undocumented Z80-instructions\n\ |
| 146 | -warn-undocumented-instructions\n\ |
| 147 | -Wud\n\ |
| 148 | \tissue warnings for undocumented Z80-instructions that work on R800\n\ |
| 149 | -warn-unportable-instructions\n\ |
| 150 | -Wup\n\ |
| 151 | \tissue warnings for other undocumented Z80-instructions\n\ |
| 152 | -forbid-undocumented-instructions\n\ |
| 153 | -Fud\n\ |
| 154 | \ttreat all undocumented z80-instructions as errors\n\ |
| 155 | -forbid-unportable-instructions\n\ |
| 156 | -Fup\n\ |
| 157 | \ttreat undocumented z80-instructions that do not work on R800 as errors\n\ |
| 158 | -r800\t assemble for R800\n\n\ |
| 159 | Default: -z80 -ignore-undocumented-instructions -warn-unportable-instructions.\n"); |
| 160 | } |
| 161 | |
| 162 | static symbolS * zero; |
| 163 | |
| 164 | struct reg_entry |
| 165 | { |
| 166 | const char* name; |
| 167 | int number; |
| 168 | }; |
| 169 | #define R_STACKABLE (0x80) |
| 170 | #define R_ARITH (0x40) |
| 171 | #define R_IX (0x20) |
| 172 | #define R_IY (0x10) |
| 173 | #define R_INDEX (R_IX | R_IY) |
| 174 | |
| 175 | #define REG_A (7) |
| 176 | #define REG_B (0) |
| 177 | #define REG_C (1) |
| 178 | #define REG_D (2) |
| 179 | #define REG_E (3) |
| 180 | #define REG_H (4) |
| 181 | #define REG_L (5) |
| 182 | #define REG_F (6 | 8) |
| 183 | #define REG_I (9) |
| 184 | #define REG_R (10) |
| 185 | |
| 186 | #define REG_AF (3 | R_STACKABLE) |
| 187 | #define REG_BC (0 | R_STACKABLE | R_ARITH) |
| 188 | #define REG_DE (1 | R_STACKABLE | R_ARITH) |
| 189 | #define REG_HL (2 | R_STACKABLE | R_ARITH) |
| 190 | #define REG_IX (REG_HL | R_IX) |
| 191 | #define REG_IY (REG_HL | R_IY) |
| 192 | #define REG_SP (3 | R_ARITH) |
| 193 | |
| 194 | static const struct reg_entry regtable[] = |
| 195 | { |
| 196 | {"a", REG_A }, |
| 197 | {"af", REG_AF }, |
| 198 | {"b", REG_B }, |
| 199 | {"bc", REG_BC }, |
| 200 | {"c", REG_C }, |
| 201 | {"d", REG_D }, |
| 202 | {"de", REG_DE }, |
| 203 | {"e", REG_E }, |
| 204 | {"f", REG_F }, |
| 205 | {"h", REG_H }, |
| 206 | {"hl", REG_HL }, |
| 207 | {"i", REG_I }, |
| 208 | {"ix", REG_IX }, |
| 209 | {"ixh",REG_H | R_IX }, |
| 210 | {"ixl",REG_L | R_IX }, |
| 211 | {"iy", REG_IY }, |
| 212 | {"iyh",REG_H | R_IY }, |
| 213 | {"iyl",REG_L | R_IY }, |
| 214 | {"l", REG_L }, |
| 215 | {"r", REG_R }, |
| 216 | {"sp", REG_SP }, |
| 217 | } ; |
| 218 | |
| 219 | #define BUFLEN 8 /* Large enough for any keyword. */ |
| 220 | |
| 221 | void |
| 222 | md_begin (void) |
| 223 | { |
| 224 | expressionS nul, reg; |
| 225 | char * p; |
| 226 | unsigned int i, j, k; |
| 227 | char buf[BUFLEN]; |
| 228 | |
| 229 | reg.X_op = O_register; |
| 230 | reg.X_md = 0; |
| 231 | reg.X_add_symbol = reg.X_op_symbol = 0; |
| 232 | for ( i = 0 ; i < ARRAY_SIZE ( regtable ) ; ++i ) |
| 233 | { |
| 234 | reg.X_add_number = regtable[i].number; |
| 235 | k = strlen ( regtable[i].name ); |
| 236 | buf[k] = 0; |
| 237 | if ( k+1 < BUFLEN ) |
| 238 | { |
| 239 | for ( j = ( 1<<k ) ; j ; --j ) |
| 240 | { |
| 241 | for ( k = 0 ; regtable[i].name[k] ; ++k ) |
| 242 | { |
| 243 | buf[k] = ( j & ( 1<<k ) ) ? TOUPPER ( regtable[i].name[k] ) : regtable[i].name[k]; |
| 244 | } |
| 245 | symbolS * psym = symbol_find_or_make(buf); |
| 246 | S_SET_SEGMENT(psym, reg_section); |
| 247 | symbol_set_value_expression(psym, ®); |
| 248 | } |
| 249 | } |
| 250 | } |
| 251 | p = input_line_pointer; |
| 252 | input_line_pointer = (char *) "0"; |
| 253 | nul.X_md=0; |
| 254 | expression (& nul); |
| 255 | input_line_pointer = p; |
| 256 | zero = make_expr_symbol (& nul); |
| 257 | /* We do not use relaxation (yet). */ |
| 258 | linkrelax = 0; |
| 259 | } |
| 260 | |
| 261 | void |
| 262 | z80_md_end (void) |
| 263 | { |
| 264 | int mach_type; |
| 265 | |
| 266 | if (ins_used & (INS_UNPORT | INS_R800)) |
| 267 | ins_used |= INS_UNDOC; |
| 268 | |
| 269 | switch (ins_used) |
| 270 | { |
| 271 | case INS_Z80: |
| 272 | mach_type = bfd_mach_z80strict; |
| 273 | break; |
| 274 | case INS_Z80|INS_UNDOC: |
| 275 | mach_type = bfd_mach_z80; |
| 276 | break; |
| 277 | case INS_Z80|INS_UNDOC|INS_UNPORT: |
| 278 | mach_type = bfd_mach_z80full; |
| 279 | break; |
| 280 | case INS_Z80|INS_UNDOC|INS_R800: |
| 281 | mach_type = bfd_mach_r800; |
| 282 | break; |
| 283 | default: |
| 284 | mach_type = 0; |
| 285 | } |
| 286 | |
| 287 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, mach_type); |
| 288 | } |
| 289 | |
| 290 | static const char * |
| 291 | skip_space (const char *s) |
| 292 | { |
| 293 | while (*s == ' ' || *s == '\t') |
| 294 | ++s; |
| 295 | return s; |
| 296 | } |
| 297 | |
| 298 | /* A non-zero return-value causes a continue in the |
| 299 | function read_a_source_file () in ../read.c. */ |
| 300 | int |
| 301 | z80_start_line_hook (void) |
| 302 | { |
| 303 | char *p, quote; |
| 304 | char buf[4]; |
| 305 | |
| 306 | /* Convert one character constants. */ |
| 307 | for (p = input_line_pointer; *p && *p != '\n'; ++p) |
| 308 | { |
| 309 | switch (*p) |
| 310 | { |
| 311 | case '\'': |
| 312 | if (p[1] != 0 && p[1] != '\'' && p[2] == '\'') |
| 313 | { |
| 314 | snprintf (buf, 4, "%3d", (unsigned char)p[1]); |
| 315 | *p++ = buf[0]; |
| 316 | *p++ = buf[1]; |
| 317 | *p++ = buf[2]; |
| 318 | break; |
| 319 | } |
| 320 | /* Fall through. */ |
| 321 | case '"': |
| 322 | for (quote = *p++; quote != *p && '\n' != *p; ++p) |
| 323 | /* No escapes. */ ; |
| 324 | if (quote != *p) |
| 325 | { |
| 326 | as_bad (_("-- unterminated string")); |
| 327 | ignore_rest_of_line (); |
| 328 | return 1; |
| 329 | } |
| 330 | break; |
| 331 | } |
| 332 | } |
| 333 | /* Check for <label>[:] [.](EQU|DEFL) <value>. */ |
| 334 | if (is_name_beginner (*input_line_pointer)) |
| 335 | { |
| 336 | char *name; |
| 337 | char c, *rest, *line_start; |
| 338 | int len; |
| 339 | |
| 340 | line_start = input_line_pointer; |
| 341 | if (ignore_input ()) |
| 342 | return 0; |
| 343 | |
| 344 | c = get_symbol_name (&name); |
| 345 | rest = input_line_pointer + 1; |
| 346 | |
| 347 | if (*rest == ':') |
| 348 | ++rest; |
| 349 | if (*rest == ' ' || *rest == '\t') |
| 350 | ++rest; |
| 351 | if (*rest == '.') |
| 352 | ++rest; |
| 353 | if (strncasecmp (rest, "EQU", 3) == 0) |
| 354 | len = 3; |
| 355 | else if (strncasecmp (rest, "DEFL", 4) == 0) |
| 356 | len = 4; |
| 357 | else |
| 358 | len = 0; |
| 359 | if (len && (!ISALPHA(rest[len]) ) ) |
| 360 | { |
| 361 | /* Handle assignment here. */ |
| 362 | if (line_start[-1] == '\n') |
| 363 | { |
| 364 | bump_line_counters (); |
| 365 | LISTING_NEWLINE (); |
| 366 | } |
| 367 | input_line_pointer = rest + len - 1; |
| 368 | /* Allow redefining with "DEFL" (len == 4), but not with "EQU". */ |
| 369 | equals (name, len == 4); |
| 370 | return 1; |
| 371 | } |
| 372 | else |
| 373 | { |
| 374 | /* Restore line and pointer. */ |
| 375 | (void) restore_line_pointer (c); |
| 376 | input_line_pointer = line_start; |
| 377 | } |
| 378 | } |
| 379 | return 0; |
| 380 | } |
| 381 | |
| 382 | symbolS * |
| 383 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) |
| 384 | { |
| 385 | return NULL; |
| 386 | } |
| 387 | |
| 388 | const char * |
| 389 | md_atof (int type ATTRIBUTE_UNUSED, char *litP ATTRIBUTE_UNUSED, |
| 390 | int *sizeP ATTRIBUTE_UNUSED) |
| 391 | { |
| 392 | return _("floating point numbers are not implemented"); |
| 393 | } |
| 394 | |
| 395 | valueT |
| 396 | md_section_align (segT seg ATTRIBUTE_UNUSED, valueT size) |
| 397 | { |
| 398 | return size; |
| 399 | } |
| 400 | |
| 401 | long |
| 402 | md_pcrel_from (fixS * fixp) |
| 403 | { |
| 404 | return fixp->fx_where + |
| 405 | fixp->fx_frag->fr_address + 1; |
| 406 | } |
| 407 | |
| 408 | typedef const char * (asfunc)(char, char, const char*); |
| 409 | |
| 410 | typedef struct _table_t |
| 411 | { |
| 412 | const char* name; |
| 413 | unsigned char prefix; |
| 414 | unsigned char opcode; |
| 415 | asfunc * fp; |
| 416 | } table_t; |
| 417 | |
| 418 | /* Compares the key for structs that start with a char * to the key. */ |
| 419 | static int |
| 420 | key_cmp (const void * a, const void * b) |
| 421 | { |
| 422 | const char *str_a, *str_b; |
| 423 | |
| 424 | str_a = *((const char**)a); |
| 425 | str_b = *((const char**)b); |
| 426 | return strcmp (str_a, str_b); |
| 427 | } |
| 428 | |
| 429 | char buf[BUFLEN]; |
| 430 | const char *key = buf; |
| 431 | |
| 432 | /* Prevent an error on a line from also generating |
| 433 | a "junk at end of line" error message. */ |
| 434 | static char err_flag; |
| 435 | |
| 436 | static void |
| 437 | error (const char * message) |
| 438 | { |
| 439 | as_bad ("%s", message); |
| 440 | err_flag = 1; |
| 441 | } |
| 442 | |
| 443 | static void |
| 444 | ill_op (void) |
| 445 | { |
| 446 | error (_("illegal operand")); |
| 447 | } |
| 448 | |
| 449 | static void |
| 450 | wrong_mach (int ins_type) |
| 451 | { |
| 452 | const char *p; |
| 453 | |
| 454 | switch (ins_type) |
| 455 | { |
| 456 | case INS_UNDOC: |
| 457 | p = "undocumented instruction"; |
| 458 | break; |
| 459 | case INS_UNPORT: |
| 460 | p = "instruction does not work on R800"; |
| 461 | break; |
| 462 | case INS_R800: |
| 463 | p = "instruction only works R800"; |
| 464 | break; |
| 465 | default: |
| 466 | p = 0; /* Not reachable. */ |
| 467 | } |
| 468 | |
| 469 | if (ins_type & ins_err) |
| 470 | error (_(p)); |
| 471 | else |
| 472 | as_warn ("%s", _(p)); |
| 473 | } |
| 474 | |
| 475 | static void |
| 476 | check_mach (int ins_type) |
| 477 | { |
| 478 | if ((ins_type & ins_ok) == 0) |
| 479 | wrong_mach (ins_type); |
| 480 | ins_used |= ins_type; |
| 481 | } |
| 482 | |
| 483 | /* Check whether an expression is indirect. */ |
| 484 | static int |
| 485 | is_indir (const char *s) |
| 486 | { |
| 487 | char quote; |
| 488 | const char *p; |
| 489 | int indir, depth; |
| 490 | |
| 491 | /* Indirection is indicated with parentheses. */ |
| 492 | indir = (*s == '('); |
| 493 | |
| 494 | for (p = s, depth = 0; *p && *p != ','; ++p) |
| 495 | { |
| 496 | switch (*p) |
| 497 | { |
| 498 | case '"': |
| 499 | case '\'': |
| 500 | for (quote = *p++; quote != *p && *p != '\n'; ++p) |
| 501 | if (*p == '\\' && p[1]) |
| 502 | ++p; |
| 503 | break; |
| 504 | case '(': |
| 505 | ++ depth; |
| 506 | break; |
| 507 | case ')': |
| 508 | -- depth; |
| 509 | if (depth == 0) |
| 510 | { |
| 511 | p = skip_space (p + 1); |
| 512 | if (*p && *p != ',') |
| 513 | indir = 0; |
| 514 | --p; |
| 515 | } |
| 516 | if (depth < 0) |
| 517 | error (_("mismatched parentheses")); |
| 518 | break; |
| 519 | } |
| 520 | } |
| 521 | |
| 522 | if (depth != 0) |
| 523 | error (_("mismatched parentheses")); |
| 524 | |
| 525 | return indir; |
| 526 | } |
| 527 | |
| 528 | /* Check whether a symbol involves a register. */ |
| 529 | static int |
| 530 | contains_register(symbolS *sym) |
| 531 | { |
| 532 | if (sym) |
| 533 | { |
| 534 | expressionS * ex = symbol_get_value_expression(sym); |
| 535 | return (O_register == ex->X_op) |
| 536 | || (ex->X_add_symbol && contains_register(ex->X_add_symbol)) |
| 537 | || (ex->X_op_symbol && contains_register(ex->X_op_symbol)); |
| 538 | } |
| 539 | else |
| 540 | return 0; |
| 541 | } |
| 542 | |
| 543 | /* Parse general expression, not looking for indexed addressing. */ |
| 544 | static const char * |
| 545 | parse_exp_not_indexed (const char *s, expressionS *op) |
| 546 | { |
| 547 | const char *p; |
| 548 | int indir; |
| 549 | |
| 550 | p = skip_space (s); |
| 551 | op->X_md = indir = is_indir (p); |
| 552 | input_line_pointer = (char*) s ; |
| 553 | expression (op); |
| 554 | switch (op->X_op) |
| 555 | { |
| 556 | case O_absent: |
| 557 | error (_("missing operand")); |
| 558 | break; |
| 559 | case O_illegal: |
| 560 | error (_("bad expression syntax")); |
| 561 | break; |
| 562 | default: |
| 563 | break; |
| 564 | } |
| 565 | return input_line_pointer; |
| 566 | } |
| 567 | |
| 568 | /* Parse expression, change operator to O_md1 for indexed addressing*/ |
| 569 | static const char * |
| 570 | parse_exp (const char *s, expressionS *op) |
| 571 | { |
| 572 | const char* res = parse_exp_not_indexed (s, op); |
| 573 | switch (op->X_op) |
| 574 | { |
| 575 | case O_add: |
| 576 | case O_subtract: |
| 577 | if (op->X_md && (O_register == symbol_get_value_expression(op->X_add_symbol)->X_op)) |
| 578 | { |
| 579 | int rnum = symbol_get_value_expression(op->X_add_symbol)->X_add_number; |
| 580 | if ( ((REG_IX != rnum) && (REG_IY != rnum)) || contains_register(op->X_op_symbol) ) |
| 581 | { |
| 582 | ill_op(); |
| 583 | } |
| 584 | else |
| 585 | { |
| 586 | if (O_subtract == op->X_op) |
| 587 | { |
| 588 | expressionS minus; |
| 589 | minus.X_op = O_uminus; |
| 590 | minus.X_add_number = 0; |
| 591 | minus.X_add_symbol = op->X_op_symbol; |
| 592 | minus.X_op_symbol = 0; |
| 593 | op->X_op_symbol = make_expr_symbol(&minus); |
| 594 | op->X_op = O_add; |
| 595 | } |
| 596 | symbol_get_value_expression(op->X_op_symbol)->X_add_number += op->X_add_number; |
| 597 | op->X_add_number = rnum; |
| 598 | op->X_add_symbol = op->X_op_symbol; |
| 599 | op->X_op_symbol = 0; |
| 600 | op->X_op = O_md1; |
| 601 | } |
| 602 | } |
| 603 | break; |
| 604 | case O_register: |
| 605 | if ( op->X_md && ((REG_IX == op->X_add_number)||(REG_IY == op->X_add_number)) ) |
| 606 | { |
| 607 | op->X_add_symbol = zero; |
| 608 | op->X_op = O_md1; |
| 609 | } |
| 610 | break; |
| 611 | default: |
| 612 | break; |
| 613 | } |
| 614 | return res; |
| 615 | } |
| 616 | |
| 617 | /* Condition codes, including some synonyms provided by HiTech zas. */ |
| 618 | static const struct reg_entry cc_tab[] = |
| 619 | { |
| 620 | { "age", 6 << 3 }, |
| 621 | { "alt", 7 << 3 }, |
| 622 | { "c", 3 << 3 }, |
| 623 | { "di", 4 << 3 }, |
| 624 | { "ei", 5 << 3 }, |
| 625 | { "lge", 2 << 3 }, |
| 626 | { "llt", 3 << 3 }, |
| 627 | { "m", 7 << 3 }, |
| 628 | { "nc", 2 << 3 }, |
| 629 | { "nz", 0 << 3 }, |
| 630 | { "p", 6 << 3 }, |
| 631 | { "pe", 5 << 3 }, |
| 632 | { "po", 4 << 3 }, |
| 633 | { "z", 1 << 3 }, |
| 634 | } ; |
| 635 | |
| 636 | /* Parse condition code. */ |
| 637 | static const char * |
| 638 | parse_cc (const char *s, char * op) |
| 639 | { |
| 640 | const char *p; |
| 641 | int i; |
| 642 | struct reg_entry * cc_p; |
| 643 | |
| 644 | for (i = 0; i < BUFLEN; ++i) |
| 645 | { |
| 646 | if (!ISALPHA (s[i])) /* Condition codes consist of letters only. */ |
| 647 | break; |
| 648 | buf[i] = TOLOWER (s[i]); |
| 649 | } |
| 650 | |
| 651 | if ((i < BUFLEN) |
| 652 | && ((s[i] == 0) || (s[i] == ','))) |
| 653 | { |
| 654 | buf[i] = 0; |
| 655 | cc_p = bsearch (&key, cc_tab, ARRAY_SIZE (cc_tab), |
| 656 | sizeof (cc_tab[0]), key_cmp); |
| 657 | } |
| 658 | else |
| 659 | cc_p = NULL; |
| 660 | |
| 661 | if (cc_p) |
| 662 | { |
| 663 | *op = cc_p->number; |
| 664 | p = s + i; |
| 665 | } |
| 666 | else |
| 667 | p = NULL; |
| 668 | |
| 669 | return p; |
| 670 | } |
| 671 | |
| 672 | static const char * |
| 673 | emit_insn (char prefix, char opcode, const char * args) |
| 674 | { |
| 675 | char *p; |
| 676 | |
| 677 | if (prefix) |
| 678 | { |
| 679 | p = frag_more (2); |
| 680 | *p++ = prefix; |
| 681 | } |
| 682 | else |
| 683 | p = frag_more (1); |
| 684 | *p = opcode; |
| 685 | return args; |
| 686 | } |
| 687 | |
| 688 | void z80_cons_fix_new (fragS *frag_p, int offset, int nbytes, expressionS *exp) |
| 689 | { |
| 690 | bfd_reloc_code_real_type r[4] = |
| 691 | { |
| 692 | BFD_RELOC_8, |
| 693 | BFD_RELOC_16, |
| 694 | BFD_RELOC_24, |
| 695 | BFD_RELOC_32 |
| 696 | }; |
| 697 | |
| 698 | if (nbytes < 1 || nbytes > 4) |
| 699 | { |
| 700 | as_bad (_("unsupported BFD relocation size %u"), nbytes); |
| 701 | } |
| 702 | else |
| 703 | { |
| 704 | fix_new_exp (frag_p, offset, nbytes, exp, 0, r[nbytes-1]); |
| 705 | } |
| 706 | } |
| 707 | |
| 708 | static void |
| 709 | emit_byte (expressionS * val, bfd_reloc_code_real_type r_type) |
| 710 | { |
| 711 | char *p; |
| 712 | int lo, hi; |
| 713 | |
| 714 | p = frag_more (1); |
| 715 | *p = val->X_add_number; |
| 716 | if ( contains_register(val->X_add_symbol) || contains_register(val->X_op_symbol) ) |
| 717 | { |
| 718 | ill_op(); |
| 719 | } |
| 720 | else if ((r_type == BFD_RELOC_8_PCREL) && (val->X_op == O_constant)) |
| 721 | { |
| 722 | as_bad (_("cannot make a relative jump to an absolute location")); |
| 723 | } |
| 724 | else if (val->X_op == O_constant) |
| 725 | { |
| 726 | lo = -128; |
| 727 | hi = (BFD_RELOC_8 == r_type) ? 255 : 127; |
| 728 | |
| 729 | if ((val->X_add_number < lo) || (val->X_add_number > hi)) |
| 730 | { |
| 731 | if (r_type == BFD_RELOC_Z80_DISP8) |
| 732 | as_bad (_("offset too large")); |
| 733 | else |
| 734 | as_warn (_("overflow")); |
| 735 | } |
| 736 | } |
| 737 | else |
| 738 | { |
| 739 | fix_new_exp (frag_now, p - frag_now->fr_literal, 1, val, |
| 740 | (r_type == BFD_RELOC_8_PCREL) ? TRUE : FALSE, r_type); |
| 741 | /* FIXME : Process constant offsets immediately. */ |
| 742 | } |
| 743 | } |
| 744 | |
| 745 | static void |
| 746 | emit_word (expressionS * val) |
| 747 | { |
| 748 | char *p; |
| 749 | |
| 750 | p = frag_more (2); |
| 751 | if ( (val->X_op == O_register) |
| 752 | || (val->X_op == O_md1) |
| 753 | || contains_register(val->X_add_symbol) |
| 754 | || contains_register(val->X_op_symbol) ) |
| 755 | ill_op (); |
| 756 | else |
| 757 | { |
| 758 | *p = val->X_add_number; |
| 759 | p[1] = (val->X_add_number>>8); |
| 760 | if (val->X_op != O_constant) |
| 761 | fix_new_exp (frag_now, p - frag_now->fr_literal, 2, |
| 762 | val, FALSE, BFD_RELOC_16); |
| 763 | } |
| 764 | } |
| 765 | |
| 766 | static void |
| 767 | emit_mx (char prefix, char opcode, int shift, expressionS * arg) |
| 768 | /* The operand m may be r, (hl), (ix+d), (iy+d), |
| 769 | if 0 == prefix m may also be ixl, ixh, iyl, iyh. */ |
| 770 | { |
| 771 | char *q; |
| 772 | int rnum; |
| 773 | |
| 774 | rnum = arg->X_add_number; |
| 775 | switch (arg->X_op) |
| 776 | { |
| 777 | case O_register: |
| 778 | if (arg->X_md) |
| 779 | { |
| 780 | if (rnum != REG_HL) |
| 781 | { |
| 782 | ill_op (); |
| 783 | break; |
| 784 | } |
| 785 | else |
| 786 | rnum = 6; |
| 787 | } |
| 788 | else |
| 789 | { |
| 790 | if ((prefix == 0) && (rnum & R_INDEX)) |
| 791 | { |
| 792 | prefix = (rnum & R_IX) ? 0xDD : 0xFD; |
| 793 | check_mach (INS_UNDOC); |
| 794 | rnum &= ~R_INDEX; |
| 795 | } |
| 796 | if (rnum > 7) |
| 797 | { |
| 798 | ill_op (); |
| 799 | break; |
| 800 | } |
| 801 | } |
| 802 | q = frag_more (prefix ? 2 : 1); |
| 803 | if (prefix) |
| 804 | * q ++ = prefix; |
| 805 | * q ++ = opcode + (rnum << shift); |
| 806 | break; |
| 807 | case O_md1: |
| 808 | q = frag_more (2); |
| 809 | *q++ = (rnum & R_IX) ? 0xDD : 0xFD; |
| 810 | *q = (prefix) ? prefix : (opcode + (6 << shift)); |
| 811 | { |
| 812 | expressionS offset = *arg; |
| 813 | offset.X_op = O_symbol; |
| 814 | offset.X_add_number = 0; |
| 815 | emit_byte (&offset, BFD_RELOC_Z80_DISP8); |
| 816 | } |
| 817 | if (prefix) |
| 818 | { |
| 819 | q = frag_more (1); |
| 820 | *q = opcode+(6<<shift); |
| 821 | } |
| 822 | break; |
| 823 | default: |
| 824 | abort (); |
| 825 | } |
| 826 | } |
| 827 | |
| 828 | /* The operand m may be r, (hl), (ix+d), (iy+d), |
| 829 | if 0 = prefix m may also be ixl, ixh, iyl, iyh. */ |
| 830 | static const char * |
| 831 | emit_m (char prefix, char opcode, const char *args) |
| 832 | { |
| 833 | expressionS arg_m; |
| 834 | const char *p; |
| 835 | |
| 836 | p = parse_exp (args, &arg_m); |
| 837 | switch (arg_m.X_op) |
| 838 | { |
| 839 | case O_md1: |
| 840 | case O_register: |
| 841 | emit_mx (prefix, opcode, 0, &arg_m); |
| 842 | break; |
| 843 | default: |
| 844 | ill_op (); |
| 845 | } |
| 846 | return p; |
| 847 | } |
| 848 | |
| 849 | /* The operand m may be as above or one of the undocumented |
| 850 | combinations (ix+d),r and (iy+d),r (if unportable instructions |
| 851 | are allowed). */ |
| 852 | |
| 853 | static const char * |
| 854 | emit_mr (char prefix, char opcode, const char *args, bfd_boolean unportable) |
| 855 | { |
| 856 | expressionS arg_m, arg_r; |
| 857 | const char *p; |
| 858 | |
| 859 | p = parse_exp (args, & arg_m); |
| 860 | |
| 861 | switch (arg_m.X_op) |
| 862 | { |
| 863 | case O_md1: |
| 864 | if (*p == ',') |
| 865 | { |
| 866 | p = parse_exp (p + 1, & arg_r); |
| 867 | |
| 868 | if ((arg_r.X_md == 0) |
| 869 | && (arg_r.X_op == O_register) |
| 870 | && (arg_r.X_add_number < 8)) |
| 871 | opcode += arg_r.X_add_number - 6; /* Emit_mx () will add 6. */ |
| 872 | else |
| 873 | { |
| 874 | ill_op (); |
| 875 | break; |
| 876 | } |
| 877 | check_mach (INS_UNPORT); |
| 878 | unportable = TRUE; |
| 879 | } |
| 880 | /* Fall through. */ |
| 881 | case O_register: |
| 882 | if (unportable) |
| 883 | check_mach (INS_UNPORT); |
| 884 | emit_mx (prefix, opcode, 0, & arg_m); |
| 885 | break; |
| 886 | default: |
| 887 | ill_op (); |
| 888 | } |
| 889 | return p; |
| 890 | } |
| 891 | |
| 892 | static const char * |
| 893 | emit_mr_z80 (char prefix, char opcode, const char *args) |
| 894 | { |
| 895 | return emit_mr (prefix, opcode, args, FALSE); |
| 896 | } |
| 897 | |
| 898 | static const char * |
| 899 | emit_mr_unport (char prefix, char opcode, const char *args) |
| 900 | { |
| 901 | return emit_mr (prefix, opcode, args, TRUE); |
| 902 | } |
| 903 | |
| 904 | static void |
| 905 | emit_sx (char prefix, char opcode, expressionS * arg_p) |
| 906 | { |
| 907 | char *q; |
| 908 | |
| 909 | switch (arg_p->X_op) |
| 910 | { |
| 911 | case O_register: |
| 912 | case O_md1: |
| 913 | emit_mx (prefix, opcode, 0, arg_p); |
| 914 | break; |
| 915 | default: |
| 916 | if (arg_p->X_md) |
| 917 | ill_op (); |
| 918 | else |
| 919 | { |
| 920 | q = frag_more (prefix ? 2 : 1); |
| 921 | if (prefix) |
| 922 | *q++ = prefix; |
| 923 | *q = opcode ^ 0x46; |
| 924 | emit_byte (arg_p, BFD_RELOC_8); |
| 925 | } |
| 926 | } |
| 927 | } |
| 928 | |
| 929 | /* The operand s may be r, (hl), (ix+d), (iy+d), n. */ |
| 930 | static const char * |
| 931 | emit_s (char prefix, char opcode, const char *args) |
| 932 | { |
| 933 | expressionS arg_s; |
| 934 | const char *p; |
| 935 | |
| 936 | p = parse_exp (args, & arg_s); |
| 937 | emit_sx (prefix, opcode, & arg_s); |
| 938 | return p; |
| 939 | } |
| 940 | |
| 941 | static const char * |
| 942 | emit_call (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) |
| 943 | { |
| 944 | expressionS addr; |
| 945 | const char *p; char *q; |
| 946 | |
| 947 | p = parse_exp_not_indexed (args, &addr); |
| 948 | if (addr.X_md) |
| 949 | ill_op (); |
| 950 | else |
| 951 | { |
| 952 | q = frag_more (1); |
| 953 | *q = opcode; |
| 954 | emit_word (& addr); |
| 955 | } |
| 956 | return p; |
| 957 | } |
| 958 | |
| 959 | /* Operand may be rr, r, (hl), (ix+d), (iy+d). */ |
| 960 | static const char * |
| 961 | emit_incdec (char prefix, char opcode, const char * args) |
| 962 | { |
| 963 | expressionS operand; |
| 964 | int rnum; |
| 965 | const char *p; char *q; |
| 966 | |
| 967 | p = parse_exp (args, &operand); |
| 968 | rnum = operand.X_add_number; |
| 969 | if ((! operand.X_md) |
| 970 | && (operand.X_op == O_register) |
| 971 | && (R_ARITH&rnum)) |
| 972 | { |
| 973 | q = frag_more ((rnum & R_INDEX) ? 2 : 1); |
| 974 | if (rnum & R_INDEX) |
| 975 | *q++ = (rnum & R_IX) ? 0xDD : 0xFD; |
| 976 | *q = prefix + ((rnum & 3) << 4); |
| 977 | } |
| 978 | else |
| 979 | { |
| 980 | if ((operand.X_op == O_md1) || (operand.X_op == O_register)) |
| 981 | emit_mx (0, opcode, 3, & operand); |
| 982 | else |
| 983 | ill_op (); |
| 984 | } |
| 985 | return p; |
| 986 | } |
| 987 | |
| 988 | static const char * |
| 989 | emit_jr (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) |
| 990 | { |
| 991 | expressionS addr; |
| 992 | const char *p; |
| 993 | char *q; |
| 994 | |
| 995 | p = parse_exp_not_indexed (args, &addr); |
| 996 | if (addr.X_md) |
| 997 | ill_op (); |
| 998 | else |
| 999 | { |
| 1000 | q = frag_more (1); |
| 1001 | *q = opcode; |
| 1002 | emit_byte (&addr, BFD_RELOC_8_PCREL); |
| 1003 | } |
| 1004 | return p; |
| 1005 | } |
| 1006 | |
| 1007 | static const char * |
| 1008 | emit_jp (char prefix, char opcode, const char * args) |
| 1009 | { |
| 1010 | expressionS addr; |
| 1011 | const char *p; |
| 1012 | char *q; |
| 1013 | int rnum; |
| 1014 | |
| 1015 | p = parse_exp_not_indexed (args, & addr); |
| 1016 | if (addr.X_md) |
| 1017 | { |
| 1018 | rnum = addr.X_add_number; |
| 1019 | if ((O_register == addr.X_op) && (REG_HL == (rnum & ~R_INDEX))) |
| 1020 | { |
| 1021 | q = frag_more ((rnum & R_INDEX) ? 2 : 1); |
| 1022 | if (rnum & R_INDEX) |
| 1023 | *q++ = (rnum & R_IX) ? 0xDD : 0xFD; |
| 1024 | *q = prefix; |
| 1025 | } |
| 1026 | else |
| 1027 | ill_op (); |
| 1028 | } |
| 1029 | else |
| 1030 | { |
| 1031 | q = frag_more (1); |
| 1032 | *q = opcode; |
| 1033 | emit_word (& addr); |
| 1034 | } |
| 1035 | return p; |
| 1036 | } |
| 1037 | |
| 1038 | static const char * |
| 1039 | emit_im (char prefix, char opcode, const char * args) |
| 1040 | { |
| 1041 | expressionS mode; |
| 1042 | const char *p; |
| 1043 | char *q; |
| 1044 | |
| 1045 | p = parse_exp (args, & mode); |
| 1046 | if (mode.X_md || (mode.X_op != O_constant)) |
| 1047 | ill_op (); |
| 1048 | else |
| 1049 | switch (mode.X_add_number) |
| 1050 | { |
| 1051 | case 1: |
| 1052 | case 2: |
| 1053 | ++mode.X_add_number; |
| 1054 | /* Fall through. */ |
| 1055 | case 0: |
| 1056 | q = frag_more (2); |
| 1057 | *q++ = prefix; |
| 1058 | *q = opcode + 8*mode.X_add_number; |
| 1059 | break; |
| 1060 | default: |
| 1061 | ill_op (); |
| 1062 | } |
| 1063 | return p; |
| 1064 | } |
| 1065 | |
| 1066 | static const char * |
| 1067 | emit_pop (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) |
| 1068 | { |
| 1069 | expressionS regp; |
| 1070 | const char *p; |
| 1071 | char *q; |
| 1072 | |
| 1073 | p = parse_exp (args, & regp); |
| 1074 | if ((!regp.X_md) |
| 1075 | && (regp.X_op == O_register) |
| 1076 | && (regp.X_add_number & R_STACKABLE)) |
| 1077 | { |
| 1078 | int rnum; |
| 1079 | |
| 1080 | rnum = regp.X_add_number; |
| 1081 | if (rnum&R_INDEX) |
| 1082 | { |
| 1083 | q = frag_more (2); |
| 1084 | *q++ = (rnum&R_IX)?0xDD:0xFD; |
| 1085 | } |
| 1086 | else |
| 1087 | q = frag_more (1); |
| 1088 | *q = opcode + ((rnum & 3) << 4); |
| 1089 | } |
| 1090 | else |
| 1091 | ill_op (); |
| 1092 | |
| 1093 | return p; |
| 1094 | } |
| 1095 | |
| 1096 | static const char * |
| 1097 | emit_retcc (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) |
| 1098 | { |
| 1099 | char cc, *q; |
| 1100 | const char *p; |
| 1101 | |
| 1102 | p = parse_cc (args, &cc); |
| 1103 | q = frag_more (1); |
| 1104 | if (p) |
| 1105 | *q = opcode + cc; |
| 1106 | else |
| 1107 | *q = prefix; |
| 1108 | return p ? p : args; |
| 1109 | } |
| 1110 | |
| 1111 | static const char * |
| 1112 | emit_adc (char prefix, char opcode, const char * args) |
| 1113 | { |
| 1114 | expressionS term; |
| 1115 | int rnum; |
| 1116 | const char *p; |
| 1117 | char *q; |
| 1118 | |
| 1119 | p = parse_exp (args, &term); |
| 1120 | if (*p++ != ',') |
| 1121 | { |
| 1122 | error (_("bad instruction syntax")); |
| 1123 | return p; |
| 1124 | } |
| 1125 | |
| 1126 | if ((term.X_md) || (term.X_op != O_register)) |
| 1127 | ill_op (); |
| 1128 | else |
| 1129 | switch (term.X_add_number) |
| 1130 | { |
| 1131 | case REG_A: |
| 1132 | p = emit_s (0, prefix, p); |
| 1133 | break; |
| 1134 | case REG_HL: |
| 1135 | p = parse_exp (p, &term); |
| 1136 | if ((!term.X_md) && (term.X_op == O_register)) |
| 1137 | { |
| 1138 | rnum = term.X_add_number; |
| 1139 | if (R_ARITH == (rnum & (R_ARITH | R_INDEX))) |
| 1140 | { |
| 1141 | q = frag_more (2); |
| 1142 | *q++ = 0xED; |
| 1143 | *q = opcode + ((rnum & 3) << 4); |
| 1144 | break; |
| 1145 | } |
| 1146 | } |
| 1147 | /* Fall through. */ |
| 1148 | default: |
| 1149 | ill_op (); |
| 1150 | } |
| 1151 | return p; |
| 1152 | } |
| 1153 | |
| 1154 | static const char * |
| 1155 | emit_add (char prefix, char opcode, const char * args) |
| 1156 | { |
| 1157 | expressionS term; |
| 1158 | int lhs, rhs; |
| 1159 | const char *p; |
| 1160 | char *q; |
| 1161 | |
| 1162 | p = parse_exp (args, &term); |
| 1163 | if (*p++ != ',') |
| 1164 | { |
| 1165 | error (_("bad instruction syntax")); |
| 1166 | return p; |
| 1167 | } |
| 1168 | |
| 1169 | if ((term.X_md) || (term.X_op != O_register)) |
| 1170 | ill_op (); |
| 1171 | else |
| 1172 | switch (term.X_add_number & ~R_INDEX) |
| 1173 | { |
| 1174 | case REG_A: |
| 1175 | p = emit_s (0, prefix, p); |
| 1176 | break; |
| 1177 | case REG_HL: |
| 1178 | lhs = term.X_add_number; |
| 1179 | p = parse_exp (p, &term); |
| 1180 | if ((!term.X_md) && (term.X_op == O_register)) |
| 1181 | { |
| 1182 | rhs = term.X_add_number; |
| 1183 | if ((rhs & R_ARITH) |
| 1184 | && ((rhs == lhs) || ((rhs & ~R_INDEX) != REG_HL))) |
| 1185 | { |
| 1186 | q = frag_more ((lhs & R_INDEX) ? 2 : 1); |
| 1187 | if (lhs & R_INDEX) |
| 1188 | *q++ = (lhs & R_IX) ? 0xDD : 0xFD; |
| 1189 | *q = opcode + ((rhs & 3) << 4); |
| 1190 | break; |
| 1191 | } |
| 1192 | } |
| 1193 | /* Fall through. */ |
| 1194 | default: |
| 1195 | ill_op (); |
| 1196 | } |
| 1197 | return p; |
| 1198 | } |
| 1199 | |
| 1200 | static const char * |
| 1201 | emit_bit (char prefix, char opcode, const char * args) |
| 1202 | { |
| 1203 | expressionS b; |
| 1204 | int bn; |
| 1205 | const char *p; |
| 1206 | |
| 1207 | p = parse_exp (args, &b); |
| 1208 | if (*p++ != ',') |
| 1209 | error (_("bad instruction syntax")); |
| 1210 | |
| 1211 | bn = b.X_add_number; |
| 1212 | if ((!b.X_md) |
| 1213 | && (b.X_op == O_constant) |
| 1214 | && (0 <= bn) |
| 1215 | && (bn < 8)) |
| 1216 | { |
| 1217 | if (opcode == 0x40) |
| 1218 | /* Bit : no optional third operand. */ |
| 1219 | p = emit_m (prefix, opcode + (bn << 3), p); |
| 1220 | else |
| 1221 | /* Set, res : resulting byte can be copied to register. */ |
| 1222 | p = emit_mr (prefix, opcode + (bn << 3), p, FALSE); |
| 1223 | } |
| 1224 | else |
| 1225 | ill_op (); |
| 1226 | return p; |
| 1227 | } |
| 1228 | |
| 1229 | static const char * |
| 1230 | emit_jpcc (char prefix, char opcode, const char * args) |
| 1231 | { |
| 1232 | char cc; |
| 1233 | const char *p; |
| 1234 | |
| 1235 | p = parse_cc (args, & cc); |
| 1236 | if (p && *p++ == ',') |
| 1237 | p = emit_call (0, opcode + cc, p); |
| 1238 | else |
| 1239 | p = (prefix == (char)0xC3) |
| 1240 | ? emit_jp (0xE9, prefix, args) |
| 1241 | : emit_call (0, prefix, args); |
| 1242 | return p; |
| 1243 | } |
| 1244 | |
| 1245 | static const char * |
| 1246 | emit_jrcc (char prefix, char opcode, const char * args) |
| 1247 | { |
| 1248 | char cc; |
| 1249 | const char *p; |
| 1250 | |
| 1251 | p = parse_cc (args, &cc); |
| 1252 | if (p && *p++ == ',') |
| 1253 | { |
| 1254 | if (cc > (3 << 3)) |
| 1255 | error (_("condition code invalid for jr")); |
| 1256 | else |
| 1257 | p = emit_jr (0, opcode + cc, p); |
| 1258 | } |
| 1259 | else |
| 1260 | p = emit_jr (0, prefix, args); |
| 1261 | |
| 1262 | return p; |
| 1263 | } |
| 1264 | |
| 1265 | static const char * |
| 1266 | emit_ex (char prefix_in ATTRIBUTE_UNUSED, |
| 1267 | char opcode_in ATTRIBUTE_UNUSED, const char * args) |
| 1268 | { |
| 1269 | expressionS op; |
| 1270 | const char * p; |
| 1271 | char prefix, opcode; |
| 1272 | |
| 1273 | p = parse_exp_not_indexed (args, &op); |
| 1274 | p = skip_space (p); |
| 1275 | if (*p++ != ',') |
| 1276 | { |
| 1277 | error (_("bad instruction syntax")); |
| 1278 | return p; |
| 1279 | } |
| 1280 | |
| 1281 | prefix = opcode = 0; |
| 1282 | if (op.X_op == O_register) |
| 1283 | switch (op.X_add_number | (op.X_md ? 0x8000 : 0)) |
| 1284 | { |
| 1285 | case REG_AF: |
| 1286 | if (TOLOWER (*p++) == 'a' && TOLOWER (*p++) == 'f') |
| 1287 | { |
| 1288 | /* The scrubber changes '\'' to '`' in this context. */ |
| 1289 | if (*p == '`') |
| 1290 | ++p; |
| 1291 | opcode = 0x08; |
| 1292 | } |
| 1293 | break; |
| 1294 | case REG_DE: |
| 1295 | if (TOLOWER (*p++) == 'h' && TOLOWER (*p++) == 'l') |
| 1296 | opcode = 0xEB; |
| 1297 | break; |
| 1298 | case REG_SP|0x8000: |
| 1299 | p = parse_exp (p, & op); |
| 1300 | if (op.X_op == O_register |
| 1301 | && op.X_md == 0 |
| 1302 | && (op.X_add_number & ~R_INDEX) == REG_HL) |
| 1303 | { |
| 1304 | opcode = 0xE3; |
| 1305 | if (R_INDEX & op.X_add_number) |
| 1306 | prefix = (R_IX & op.X_add_number) ? 0xDD : 0xFD; |
| 1307 | } |
| 1308 | break; |
| 1309 | } |
| 1310 | if (opcode) |
| 1311 | emit_insn (prefix, opcode, p); |
| 1312 | else |
| 1313 | ill_op (); |
| 1314 | |
| 1315 | return p; |
| 1316 | } |
| 1317 | |
| 1318 | static const char * |
| 1319 | emit_in (char prefix ATTRIBUTE_UNUSED, char opcode ATTRIBUTE_UNUSED, |
| 1320 | const char * args) |
| 1321 | { |
| 1322 | expressionS reg, port; |
| 1323 | const char *p; |
| 1324 | char *q; |
| 1325 | |
| 1326 | p = parse_exp (args, ®); |
| 1327 | if (*p++ != ',') |
| 1328 | { |
| 1329 | error (_("bad instruction syntax")); |
| 1330 | return p; |
| 1331 | } |
| 1332 | |
| 1333 | p = parse_exp (p, &port); |
| 1334 | if (reg.X_md == 0 |
| 1335 | && reg.X_op == O_register |
| 1336 | && (reg.X_add_number <= 7 || reg.X_add_number == REG_F) |
| 1337 | && (port.X_md)) |
| 1338 | { |
| 1339 | if (port.X_op != O_md1 && port.X_op != O_register) |
| 1340 | { |
| 1341 | if (REG_A == reg.X_add_number) |
| 1342 | { |
| 1343 | q = frag_more (1); |
| 1344 | *q = 0xDB; |
| 1345 | emit_byte (&port, BFD_RELOC_8); |
| 1346 | } |
| 1347 | else |
| 1348 | ill_op (); |
| 1349 | } |
| 1350 | else |
| 1351 | { |
| 1352 | if (port.X_add_number == REG_C) |
| 1353 | { |
| 1354 | if (reg.X_add_number == REG_F) |
| 1355 | check_mach (INS_UNDOC); |
| 1356 | else |
| 1357 | { |
| 1358 | q = frag_more (2); |
| 1359 | *q++ = 0xED; |
| 1360 | *q = 0x40|((reg.X_add_number&7)<<3); |
| 1361 | } |
| 1362 | } |
| 1363 | else |
| 1364 | ill_op (); |
| 1365 | } |
| 1366 | } |
| 1367 | else |
| 1368 | ill_op (); |
| 1369 | return p; |
| 1370 | } |
| 1371 | |
| 1372 | static const char * |
| 1373 | emit_out (char prefix ATTRIBUTE_UNUSED, char opcode ATTRIBUTE_UNUSED, |
| 1374 | const char * args) |
| 1375 | { |
| 1376 | expressionS reg, port; |
| 1377 | const char *p; |
| 1378 | char *q; |
| 1379 | |
| 1380 | p = parse_exp (args, & port); |
| 1381 | if (*p++ != ',') |
| 1382 | { |
| 1383 | error (_("bad instruction syntax")); |
| 1384 | return p; |
| 1385 | } |
| 1386 | p = parse_exp (p, ®); |
| 1387 | if (!port.X_md) |
| 1388 | { ill_op (); return p; } |
| 1389 | /* Allow "out (c), 0" as unportable instruction. */ |
| 1390 | if (reg.X_op == O_constant && reg.X_add_number == 0) |
| 1391 | { |
| 1392 | check_mach (INS_UNPORT); |
| 1393 | reg.X_op = O_register; |
| 1394 | reg.X_add_number = 6; |
| 1395 | } |
| 1396 | if (reg.X_md |
| 1397 | || reg.X_op != O_register |
| 1398 | || reg.X_add_number > 7) |
| 1399 | ill_op (); |
| 1400 | else |
| 1401 | if (port.X_op != O_register && port.X_op != O_md1) |
| 1402 | { |
| 1403 | if (REG_A == reg.X_add_number) |
| 1404 | { |
| 1405 | q = frag_more (1); |
| 1406 | *q = 0xD3; |
| 1407 | emit_byte (&port, BFD_RELOC_8); |
| 1408 | } |
| 1409 | else |
| 1410 | ill_op (); |
| 1411 | } |
| 1412 | else |
| 1413 | { |
| 1414 | if (REG_C == port.X_add_number) |
| 1415 | { |
| 1416 | q = frag_more (2); |
| 1417 | *q++ = 0xED; |
| 1418 | *q = 0x41 | (reg.X_add_number << 3); |
| 1419 | } |
| 1420 | else |
| 1421 | ill_op (); |
| 1422 | } |
| 1423 | return p; |
| 1424 | } |
| 1425 | |
| 1426 | static const char * |
| 1427 | emit_rst (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) |
| 1428 | { |
| 1429 | expressionS addr; |
| 1430 | const char *p; |
| 1431 | char *q; |
| 1432 | |
| 1433 | p = parse_exp_not_indexed (args, &addr); |
| 1434 | if (addr.X_op != O_constant) |
| 1435 | { |
| 1436 | error ("rst needs constant address"); |
| 1437 | return p; |
| 1438 | } |
| 1439 | |
| 1440 | if (addr.X_add_number & ~(7 << 3)) |
| 1441 | ill_op (); |
| 1442 | else |
| 1443 | { |
| 1444 | q = frag_more (1); |
| 1445 | *q = opcode + (addr.X_add_number & (7 << 3)); |
| 1446 | } |
| 1447 | return p; |
| 1448 | } |
| 1449 | |
| 1450 | static void |
| 1451 | emit_ldxhl (char prefix, char opcode, expressionS *src, expressionS *d) |
| 1452 | { |
| 1453 | char *q; |
| 1454 | |
| 1455 | if (src->X_md) |
| 1456 | ill_op (); |
| 1457 | else |
| 1458 | { |
| 1459 | if (src->X_op == O_register) |
| 1460 | { |
| 1461 | if (src->X_add_number>7) |
| 1462 | ill_op (); |
| 1463 | if (prefix) |
| 1464 | { |
| 1465 | q = frag_more (2); |
| 1466 | *q++ = prefix; |
| 1467 | } |
| 1468 | else |
| 1469 | q = frag_more (1); |
| 1470 | *q = opcode + src->X_add_number; |
| 1471 | if (d) |
| 1472 | emit_byte (d, BFD_RELOC_Z80_DISP8); |
| 1473 | } |
| 1474 | else |
| 1475 | { |
| 1476 | if (prefix) |
| 1477 | { |
| 1478 | q = frag_more (2); |
| 1479 | *q++ = prefix; |
| 1480 | } |
| 1481 | else |
| 1482 | q = frag_more (1); |
| 1483 | *q = opcode^0x46; |
| 1484 | if (d) |
| 1485 | emit_byte (d, BFD_RELOC_Z80_DISP8); |
| 1486 | emit_byte (src, BFD_RELOC_8); |
| 1487 | } |
| 1488 | } |
| 1489 | } |
| 1490 | |
| 1491 | static void |
| 1492 | emit_ldreg (int dest, expressionS * src) |
| 1493 | { |
| 1494 | char *q; |
| 1495 | int rnum; |
| 1496 | |
| 1497 | switch (dest) |
| 1498 | { |
| 1499 | /* 8 Bit ld group: */ |
| 1500 | case REG_I: |
| 1501 | case REG_R: |
| 1502 | if (src->X_md == 0 && src->X_op == O_register && src->X_add_number == REG_A) |
| 1503 | { |
| 1504 | q = frag_more (2); |
| 1505 | *q++ = 0xED; |
| 1506 | *q = (dest == REG_I) ? 0x47 : 0x4F; |
| 1507 | } |
| 1508 | else |
| 1509 | ill_op (); |
| 1510 | break; |
| 1511 | |
| 1512 | case REG_A: |
| 1513 | if ((src->X_md) && src->X_op != O_register && src->X_op != O_md1) |
| 1514 | { |
| 1515 | q = frag_more (1); |
| 1516 | *q = 0x3A; |
| 1517 | emit_word (src); |
| 1518 | break; |
| 1519 | } |
| 1520 | |
| 1521 | if ((src->X_md) |
| 1522 | && src->X_op == O_register |
| 1523 | && (src->X_add_number == REG_BC || src->X_add_number == REG_DE)) |
| 1524 | { |
| 1525 | q = frag_more (1); |
| 1526 | *q = 0x0A + ((src->X_add_number & 1) << 4); |
| 1527 | break; |
| 1528 | } |
| 1529 | |
| 1530 | if ((!src->X_md) |
| 1531 | && src->X_op == O_register |
| 1532 | && (src->X_add_number == REG_R || src->X_add_number == REG_I)) |
| 1533 | { |
| 1534 | q = frag_more (2); |
| 1535 | *q++ = 0xED; |
| 1536 | *q = (src->X_add_number == REG_I) ? 0x57 : 0x5F; |
| 1537 | break; |
| 1538 | } |
| 1539 | /* Fall through. */ |
| 1540 | case REG_B: |
| 1541 | case REG_C: |
| 1542 | case REG_D: |
| 1543 | case REG_E: |
| 1544 | emit_sx (0, 0x40 + (dest << 3), src); |
| 1545 | break; |
| 1546 | |
| 1547 | case REG_H: |
| 1548 | case REG_L: |
| 1549 | if ((src->X_md == 0) |
| 1550 | && (src->X_op == O_register) |
| 1551 | && (src->X_add_number & R_INDEX)) |
| 1552 | ill_op (); |
| 1553 | else |
| 1554 | emit_sx (0, 0x40 + (dest << 3), src); |
| 1555 | break; |
| 1556 | |
| 1557 | case R_IX | REG_H: |
| 1558 | case R_IX | REG_L: |
| 1559 | case R_IY | REG_H: |
| 1560 | case R_IY | REG_L: |
| 1561 | if (src->X_md) |
| 1562 | { |
| 1563 | ill_op (); |
| 1564 | break; |
| 1565 | } |
| 1566 | check_mach (INS_UNDOC); |
| 1567 | if (src-> X_op == O_register) |
| 1568 | { |
| 1569 | rnum = src->X_add_number; |
| 1570 | if ((rnum & ~R_INDEX) < 8 |
| 1571 | && ((rnum & R_INDEX) == (dest & R_INDEX) |
| 1572 | || ( (rnum & ~R_INDEX) != REG_H |
| 1573 | && (rnum & ~R_INDEX) != REG_L))) |
| 1574 | { |
| 1575 | q = frag_more (2); |
| 1576 | *q++ = (dest & R_IX) ? 0xDD : 0xFD; |
| 1577 | *q = 0x40 + ((dest & 0x07) << 3) + (rnum & 7); |
| 1578 | } |
| 1579 | else |
| 1580 | ill_op (); |
| 1581 | } |
| 1582 | else |
| 1583 | { |
| 1584 | q = frag_more (2); |
| 1585 | *q++ = (dest & R_IX) ? 0xDD : 0xFD; |
| 1586 | *q = 0x06 + ((dest & 0x07) << 3); |
| 1587 | emit_byte (src, BFD_RELOC_8); |
| 1588 | } |
| 1589 | break; |
| 1590 | |
| 1591 | /* 16 Bit ld group: */ |
| 1592 | case REG_SP: |
| 1593 | if (src->X_md == 0 |
| 1594 | && src->X_op == O_register |
| 1595 | && REG_HL == (src->X_add_number &~ R_INDEX)) |
| 1596 | { |
| 1597 | q = frag_more ((src->X_add_number & R_INDEX) ? 2 : 1); |
| 1598 | if (src->X_add_number & R_INDEX) |
| 1599 | *q++ = (src->X_add_number & R_IX) ? 0xDD : 0xFD; |
| 1600 | *q = 0xF9; |
| 1601 | break; |
| 1602 | } |
| 1603 | /* Fall through. */ |
| 1604 | case REG_BC: |
| 1605 | case REG_DE: |
| 1606 | if (src->X_op == O_register || src->X_op == O_md1) |
| 1607 | ill_op (); |
| 1608 | q = frag_more (src->X_md ? 2 : 1); |
| 1609 | if (src->X_md) |
| 1610 | { |
| 1611 | *q++ = 0xED; |
| 1612 | *q = 0x4B + ((dest & 3) << 4); |
| 1613 | } |
| 1614 | else |
| 1615 | *q = 0x01 + ((dest & 3) << 4); |
| 1616 | emit_word (src); |
| 1617 | break; |
| 1618 | |
| 1619 | case REG_HL: |
| 1620 | case REG_HL | R_IX: |
| 1621 | case REG_HL | R_IY: |
| 1622 | if (src->X_op == O_register || src->X_op == O_md1) |
| 1623 | ill_op (); |
| 1624 | q = frag_more ((dest & R_INDEX) ? 2 : 1); |
| 1625 | if (dest & R_INDEX) |
| 1626 | * q ++ = (dest & R_IX) ? 0xDD : 0xFD; |
| 1627 | *q = (src->X_md) ? 0x2A : 0x21; |
| 1628 | emit_word (src); |
| 1629 | break; |
| 1630 | |
| 1631 | case REG_AF: |
| 1632 | case REG_F: |
| 1633 | ill_op (); |
| 1634 | break; |
| 1635 | |
| 1636 | default: |
| 1637 | abort (); |
| 1638 | } |
| 1639 | } |
| 1640 | |
| 1641 | static const char * |
| 1642 | emit_ld (char prefix_in ATTRIBUTE_UNUSED, char opcode_in ATTRIBUTE_UNUSED, |
| 1643 | const char * args) |
| 1644 | { |
| 1645 | expressionS dst, src; |
| 1646 | const char *p; |
| 1647 | char *q; |
| 1648 | char prefix, opcode; |
| 1649 | |
| 1650 | p = parse_exp (args, &dst); |
| 1651 | if (*p++ != ',') |
| 1652 | error (_("bad instruction syntax")); |
| 1653 | p = parse_exp (p, &src); |
| 1654 | |
| 1655 | switch (dst.X_op) |
| 1656 | { |
| 1657 | case O_md1: |
| 1658 | { |
| 1659 | expressionS dst_offset = dst; |
| 1660 | dst_offset.X_op = O_symbol; |
| 1661 | dst_offset.X_add_number = 0; |
| 1662 | emit_ldxhl ((dst.X_add_number & R_IX) ? 0xDD : 0xFD, 0x70, |
| 1663 | &src, &dst_offset); |
| 1664 | } |
| 1665 | break; |
| 1666 | |
| 1667 | case O_register: |
| 1668 | if (dst.X_md) |
| 1669 | { |
| 1670 | switch (dst.X_add_number) |
| 1671 | { |
| 1672 | case REG_BC: |
| 1673 | case REG_DE: |
| 1674 | if (src.X_md == 0 && src.X_op == O_register && src.X_add_number == REG_A) |
| 1675 | { |
| 1676 | q = frag_more (1); |
| 1677 | *q = 0x02 + ( (dst.X_add_number & 1) << 4); |
| 1678 | } |
| 1679 | else |
| 1680 | ill_op (); |
| 1681 | break; |
| 1682 | case REG_HL: |
| 1683 | emit_ldxhl (0, 0x70, &src, NULL); |
| 1684 | break; |
| 1685 | default: |
| 1686 | ill_op (); |
| 1687 | } |
| 1688 | } |
| 1689 | else |
| 1690 | emit_ldreg (dst.X_add_number, &src); |
| 1691 | break; |
| 1692 | |
| 1693 | default: |
| 1694 | if (src.X_md != 0 || src.X_op != O_register) |
| 1695 | ill_op (); |
| 1696 | prefix = opcode = 0; |
| 1697 | switch (src.X_add_number) |
| 1698 | { |
| 1699 | case REG_A: |
| 1700 | opcode = 0x32; break; |
| 1701 | case REG_BC: case REG_DE: case REG_SP: |
| 1702 | prefix = 0xED; opcode = 0x43 + ((src.X_add_number&3)<<4); break; |
| 1703 | case REG_HL: |
| 1704 | opcode = 0x22; break; |
| 1705 | case REG_HL|R_IX: |
| 1706 | prefix = 0xDD; opcode = 0x22; break; |
| 1707 | case REG_HL|R_IY: |
| 1708 | prefix = 0xFD; opcode = 0x22; break; |
| 1709 | } |
| 1710 | if (opcode) |
| 1711 | { |
| 1712 | q = frag_more (prefix?2:1); |
| 1713 | if (prefix) |
| 1714 | *q++ = prefix; |
| 1715 | *q = opcode; |
| 1716 | emit_word (&dst); |
| 1717 | } |
| 1718 | else |
| 1719 | ill_op (); |
| 1720 | } |
| 1721 | return p; |
| 1722 | } |
| 1723 | |
| 1724 | static void |
| 1725 | emit_data (int size ATTRIBUTE_UNUSED) |
| 1726 | { |
| 1727 | const char *p, *q; |
| 1728 | char *u, quote; |
| 1729 | int cnt; |
| 1730 | expressionS exp; |
| 1731 | |
| 1732 | if (is_it_end_of_statement ()) |
| 1733 | { |
| 1734 | demand_empty_rest_of_line (); |
| 1735 | return; |
| 1736 | } |
| 1737 | p = skip_space (input_line_pointer); |
| 1738 | |
| 1739 | do |
| 1740 | { |
| 1741 | if (*p == '\"' || *p == '\'') |
| 1742 | { |
| 1743 | for (quote = *p, q = ++p, cnt = 0; *p && quote != *p; ++p, ++cnt) |
| 1744 | ; |
| 1745 | u = frag_more (cnt); |
| 1746 | memcpy (u, q, cnt); |
| 1747 | if (!*p) |
| 1748 | as_warn (_("unterminated string")); |
| 1749 | else |
| 1750 | p = skip_space (p+1); |
| 1751 | } |
| 1752 | else |
| 1753 | { |
| 1754 | p = parse_exp (p, &exp); |
| 1755 | if (exp.X_op == O_md1 || exp.X_op == O_register) |
| 1756 | { |
| 1757 | ill_op (); |
| 1758 | break; |
| 1759 | } |
| 1760 | if (exp.X_md) |
| 1761 | as_warn (_("parentheses ignored")); |
| 1762 | emit_byte (&exp, BFD_RELOC_8); |
| 1763 | p = skip_space (p); |
| 1764 | } |
| 1765 | } |
| 1766 | while (*p++ == ',') ; |
| 1767 | input_line_pointer = (char *)(p-1); |
| 1768 | } |
| 1769 | |
| 1770 | static const char * |
| 1771 | emit_mulub (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) |
| 1772 | { |
| 1773 | const char *p; |
| 1774 | |
| 1775 | p = skip_space (args); |
| 1776 | if (TOLOWER (*p++) != 'a' || *p++ != ',') |
| 1777 | ill_op (); |
| 1778 | else |
| 1779 | { |
| 1780 | char *q, reg; |
| 1781 | |
| 1782 | reg = TOLOWER (*p++); |
| 1783 | switch (reg) |
| 1784 | { |
| 1785 | case 'b': |
| 1786 | case 'c': |
| 1787 | case 'd': |
| 1788 | case 'e': |
| 1789 | check_mach (INS_R800); |
| 1790 | if (!*skip_space (p)) |
| 1791 | { |
| 1792 | q = frag_more (2); |
| 1793 | *q++ = prefix; |
| 1794 | *q = opcode + ((reg - 'b') << 3); |
| 1795 | break; |
| 1796 | } |
| 1797 | /* Fall through. */ |
| 1798 | default: |
| 1799 | ill_op (); |
| 1800 | } |
| 1801 | } |
| 1802 | return p; |
| 1803 | } |
| 1804 | |
| 1805 | static const char * |
| 1806 | emit_muluw (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) |
| 1807 | { |
| 1808 | const char *p; |
| 1809 | |
| 1810 | p = skip_space (args); |
| 1811 | if (TOLOWER (*p++) != 'h' || TOLOWER (*p++) != 'l' || *p++ != ',') |
| 1812 | ill_op (); |
| 1813 | else |
| 1814 | { |
| 1815 | expressionS reg; |
| 1816 | char *q; |
| 1817 | |
| 1818 | p = parse_exp (p, & reg); |
| 1819 | |
| 1820 | if ((!reg.X_md) && reg.X_op == O_register) |
| 1821 | switch (reg.X_add_number) |
| 1822 | { |
| 1823 | case REG_BC: |
| 1824 | case REG_SP: |
| 1825 | check_mach (INS_R800); |
| 1826 | q = frag_more (2); |
| 1827 | *q++ = prefix; |
| 1828 | *q = opcode + ((reg.X_add_number & 3) << 4); |
| 1829 | break; |
| 1830 | default: |
| 1831 | ill_op (); |
| 1832 | } |
| 1833 | } |
| 1834 | return p; |
| 1835 | } |
| 1836 | |
| 1837 | /* Port specific pseudo ops. */ |
| 1838 | const pseudo_typeS md_pseudo_table[] = |
| 1839 | { |
| 1840 | { "db" , emit_data, 1}, |
| 1841 | { "d24", cons, 3}, |
| 1842 | { "d32", cons, 4}, |
| 1843 | { "def24", cons, 3}, |
| 1844 | { "def32", cons, 4}, |
| 1845 | { "defb", emit_data, 1}, |
| 1846 | { "defs", s_space, 1}, /* Synonym for ds on some assemblers. */ |
| 1847 | { "defw", cons, 2}, |
| 1848 | { "ds", s_space, 1}, /* Fill with bytes rather than words. */ |
| 1849 | { "dw", cons, 2}, |
| 1850 | { "psect", obj_coff_section, 0}, /* TODO: Translate attributes. */ |
| 1851 | { "set", 0, 0}, /* Real instruction on z80. */ |
| 1852 | { NULL, 0, 0 } |
| 1853 | } ; |
| 1854 | |
| 1855 | static table_t instab[] = |
| 1856 | { |
| 1857 | { "adc", 0x88, 0x4A, emit_adc }, |
| 1858 | { "add", 0x80, 0x09, emit_add }, |
| 1859 | { "and", 0x00, 0xA0, emit_s }, |
| 1860 | { "bit", 0xCB, 0x40, emit_bit }, |
| 1861 | { "call", 0xCD, 0xC4, emit_jpcc }, |
| 1862 | { "ccf", 0x00, 0x3F, emit_insn }, |
| 1863 | { "cp", 0x00, 0xB8, emit_s }, |
| 1864 | { "cpd", 0xED, 0xA9, emit_insn }, |
| 1865 | { "cpdr", 0xED, 0xB9, emit_insn }, |
| 1866 | { "cpi", 0xED, 0xA1, emit_insn }, |
| 1867 | { "cpir", 0xED, 0xB1, emit_insn }, |
| 1868 | { "cpl", 0x00, 0x2F, emit_insn }, |
| 1869 | { "daa", 0x00, 0x27, emit_insn }, |
| 1870 | { "dec", 0x0B, 0x05, emit_incdec }, |
| 1871 | { "di", 0x00, 0xF3, emit_insn }, |
| 1872 | { "djnz", 0x00, 0x10, emit_jr }, |
| 1873 | { "ei", 0x00, 0xFB, emit_insn }, |
| 1874 | { "ex", 0x00, 0x00, emit_ex}, |
| 1875 | { "exx", 0x00, 0xD9, emit_insn }, |
| 1876 | { "halt", 0x00, 0x76, emit_insn }, |
| 1877 | { "im", 0xED, 0x46, emit_im }, |
| 1878 | { "in", 0x00, 0x00, emit_in }, |
| 1879 | { "inc", 0x03, 0x04, emit_incdec }, |
| 1880 | { "ind", 0xED, 0xAA, emit_insn }, |
| 1881 | { "indr", 0xED, 0xBA, emit_insn }, |
| 1882 | { "ini", 0xED, 0xA2, emit_insn }, |
| 1883 | { "inir", 0xED, 0xB2, emit_insn }, |
| 1884 | { "jp", 0xC3, 0xC2, emit_jpcc }, |
| 1885 | { "jr", 0x18, 0x20, emit_jrcc }, |
| 1886 | { "ld", 0x00, 0x00, emit_ld }, |
| 1887 | { "ldd", 0xED, 0xA8, emit_insn }, |
| 1888 | { "lddr", 0xED, 0xB8, emit_insn }, |
| 1889 | { "ldi", 0xED, 0xA0, emit_insn }, |
| 1890 | { "ldir", 0xED, 0xB0, emit_insn }, |
| 1891 | { "mulub", 0xED, 0xC5, emit_mulub }, /* R800 only. */ |
| 1892 | { "muluw", 0xED, 0xC3, emit_muluw }, /* R800 only. */ |
| 1893 | { "neg", 0xed, 0x44, emit_insn }, |
| 1894 | { "nop", 0x00, 0x00, emit_insn }, |
| 1895 | { "or", 0x00, 0xB0, emit_s }, |
| 1896 | { "otdr", 0xED, 0xBB, emit_insn }, |
| 1897 | { "otir", 0xED, 0xB3, emit_insn }, |
| 1898 | { "out", 0x00, 0x00, emit_out }, |
| 1899 | { "outd", 0xED, 0xAB, emit_insn }, |
| 1900 | { "outi", 0xED, 0xA3, emit_insn }, |
| 1901 | { "pop", 0x00, 0xC1, emit_pop }, |
| 1902 | { "push", 0x00, 0xC5, emit_pop }, |
| 1903 | { "res", 0xCB, 0x80, emit_bit }, |
| 1904 | { "ret", 0xC9, 0xC0, emit_retcc }, |
| 1905 | { "reti", 0xED, 0x4D, emit_insn }, |
| 1906 | { "retn", 0xED, 0x45, emit_insn }, |
| 1907 | { "rl", 0xCB, 0x10, emit_mr_z80 }, |
| 1908 | { "rla", 0x00, 0x17, emit_insn }, |
| 1909 | { "rlc", 0xCB, 0x00, emit_mr_z80 }, |
| 1910 | { "rlca", 0x00, 0x07, emit_insn }, |
| 1911 | { "rld", 0xED, 0x6F, emit_insn }, |
| 1912 | { "rr", 0xCB, 0x18, emit_mr_z80 }, |
| 1913 | { "rra", 0x00, 0x1F, emit_insn }, |
| 1914 | { "rrc", 0xCB, 0x08, emit_mr_z80 }, |
| 1915 | { "rrca", 0x00, 0x0F, emit_insn }, |
| 1916 | { "rrd", 0xED, 0x67, emit_insn }, |
| 1917 | { "rst", 0x00, 0xC7, emit_rst}, |
| 1918 | { "sbc", 0x98, 0x42, emit_adc }, |
| 1919 | { "scf", 0x00, 0x37, emit_insn }, |
| 1920 | { "set", 0xCB, 0xC0, emit_bit }, |
| 1921 | { "sla", 0xCB, 0x20, emit_mr_z80 }, |
| 1922 | { "sli", 0xCB, 0x30, emit_mr_unport }, |
| 1923 | { "sll", 0xCB, 0x30, emit_mr_unport }, |
| 1924 | { "sra", 0xCB, 0x28, emit_mr_z80 }, |
| 1925 | { "srl", 0xCB, 0x38, emit_mr_z80 }, |
| 1926 | { "sub", 0x00, 0x90, emit_s }, |
| 1927 | { "xor", 0x00, 0xA8, emit_s }, |
| 1928 | } ; |
| 1929 | |
| 1930 | void |
| 1931 | md_assemble (char *str) |
| 1932 | { |
| 1933 | const char *p; |
| 1934 | char * old_ptr; |
| 1935 | int i; |
| 1936 | table_t *insp; |
| 1937 | |
| 1938 | err_flag = 0; |
| 1939 | old_ptr = input_line_pointer; |
| 1940 | p = skip_space (str); |
| 1941 | for (i = 0; (i < BUFLEN) && (ISALPHA (*p));) |
| 1942 | buf[i++] = TOLOWER (*p++); |
| 1943 | |
| 1944 | if (i == BUFLEN) |
| 1945 | { |
| 1946 | buf[BUFLEN-3] = buf[BUFLEN-2] = '.'; /* Mark opcode as abbreviated. */ |
| 1947 | buf[BUFLEN-1] = 0; |
| 1948 | as_bad (_("Unknown instruction '%s'"), buf); |
| 1949 | } |
| 1950 | else if ((*p) && (!ISSPACE (*p))) |
| 1951 | as_bad (_("syntax error")); |
| 1952 | else |
| 1953 | { |
| 1954 | buf[i] = 0; |
| 1955 | p = skip_space (p); |
| 1956 | key = buf; |
| 1957 | |
| 1958 | insp = bsearch (&key, instab, ARRAY_SIZE (instab), |
| 1959 | sizeof (instab[0]), key_cmp); |
| 1960 | if (!insp) |
| 1961 | as_bad (_("Unknown instruction '%s'"), buf); |
| 1962 | else |
| 1963 | { |
| 1964 | p = insp->fp (insp->prefix, insp->opcode, p); |
| 1965 | p = skip_space (p); |
| 1966 | if ((!err_flag) && *p) |
| 1967 | as_bad (_("junk at end of line, first unrecognized character is `%c'"), |
| 1968 | *p); |
| 1969 | } |
| 1970 | } |
| 1971 | input_line_pointer = old_ptr; |
| 1972 | } |
| 1973 | |
| 1974 | void |
| 1975 | md_apply_fix (fixS * fixP, valueT* valP, segT seg ATTRIBUTE_UNUSED) |
| 1976 | { |
| 1977 | long val = * (long *) valP; |
| 1978 | char *p_lit = fixP->fx_where + fixP->fx_frag->fr_literal; |
| 1979 | |
| 1980 | switch (fixP->fx_r_type) |
| 1981 | { |
| 1982 | case BFD_RELOC_8_PCREL: |
| 1983 | if (fixP->fx_addsy) |
| 1984 | { |
| 1985 | fixP->fx_no_overflow = 1; |
| 1986 | fixP->fx_done = 0; |
| 1987 | } |
| 1988 | else |
| 1989 | { |
| 1990 | fixP->fx_no_overflow = (-128 <= val && val < 128); |
| 1991 | if (!fixP->fx_no_overflow) |
| 1992 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 1993 | _("relative jump out of range")); |
| 1994 | *p_lit++ = val; |
| 1995 | fixP->fx_done = 1; |
| 1996 | } |
| 1997 | break; |
| 1998 | |
| 1999 | case BFD_RELOC_Z80_DISP8: |
| 2000 | if (fixP->fx_addsy) |
| 2001 | { |
| 2002 | fixP->fx_no_overflow = 1; |
| 2003 | fixP->fx_done = 0; |
| 2004 | } |
| 2005 | else |
| 2006 | { |
| 2007 | fixP->fx_no_overflow = (-128 <= val && val < 128); |
| 2008 | if (!fixP->fx_no_overflow) |
| 2009 | as_bad_where (fixP->fx_file, fixP->fx_line, |
| 2010 | _("index offset out of range")); |
| 2011 | *p_lit++ = val; |
| 2012 | fixP->fx_done = 1; |
| 2013 | } |
| 2014 | break; |
| 2015 | |
| 2016 | case BFD_RELOC_8: |
| 2017 | if (val > 255 || val < -128) |
| 2018 | as_warn_where (fixP->fx_file, fixP->fx_line, _("overflow")); |
| 2019 | *p_lit++ = val; |
| 2020 | fixP->fx_no_overflow = 1; |
| 2021 | if (fixP->fx_addsy == NULL) |
| 2022 | fixP->fx_done = 1; |
| 2023 | break; |
| 2024 | |
| 2025 | case BFD_RELOC_16: |
| 2026 | *p_lit++ = val; |
| 2027 | *p_lit++ = (val >> 8); |
| 2028 | fixP->fx_no_overflow = 1; |
| 2029 | if (fixP->fx_addsy == NULL) |
| 2030 | fixP->fx_done = 1; |
| 2031 | break; |
| 2032 | |
| 2033 | case BFD_RELOC_24: /* Def24 may produce this. */ |
| 2034 | *p_lit++ = val; |
| 2035 | *p_lit++ = (val >> 8); |
| 2036 | *p_lit++ = (val >> 16); |
| 2037 | fixP->fx_no_overflow = 1; |
| 2038 | if (fixP->fx_addsy == NULL) |
| 2039 | fixP->fx_done = 1; |
| 2040 | break; |
| 2041 | |
| 2042 | case BFD_RELOC_32: /* Def32 and .long may produce this. */ |
| 2043 | *p_lit++ = val; |
| 2044 | *p_lit++ = (val >> 8); |
| 2045 | *p_lit++ = (val >> 16); |
| 2046 | *p_lit++ = (val >> 24); |
| 2047 | if (fixP->fx_addsy == NULL) |
| 2048 | fixP->fx_done = 1; |
| 2049 | break; |
| 2050 | |
| 2051 | default: |
| 2052 | printf (_("md_apply_fix: unknown r_type 0x%x\n"), fixP->fx_r_type); |
| 2053 | abort (); |
| 2054 | } |
| 2055 | } |
| 2056 | |
| 2057 | /* GAS will call this to generate a reloc. GAS will pass the |
| 2058 | resulting reloc to `bfd_install_relocation'. This currently works |
| 2059 | poorly, as `bfd_install_relocation' often does the wrong thing, and |
| 2060 | instances of `tc_gen_reloc' have been written to work around the |
| 2061 | problems, which in turns makes it difficult to fix |
| 2062 | `bfd_install_relocation'. */ |
| 2063 | |
| 2064 | /* If while processing a fixup, a reloc really |
| 2065 | needs to be created then it is done here. */ |
| 2066 | |
| 2067 | arelent * |
| 2068 | tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED , fixS *fixp) |
| 2069 | { |
| 2070 | arelent *reloc; |
| 2071 | |
| 2072 | if (! bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type)) |
| 2073 | { |
| 2074 | as_bad_where (fixp->fx_file, fixp->fx_line, |
| 2075 | _("reloc %d not supported by object file format"), |
| 2076 | (int) fixp->fx_r_type); |
| 2077 | return NULL; |
| 2078 | } |
| 2079 | |
| 2080 | reloc = XNEW (arelent); |
| 2081 | reloc->sym_ptr_ptr = XNEW (asymbol *); |
| 2082 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); |
| 2083 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; |
| 2084 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); |
| 2085 | reloc->addend = fixp->fx_offset; |
| 2086 | |
| 2087 | return reloc; |
| 2088 | } |