Commit | Line | Data |
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3c9b82ba | 1 | /* tc-z80.c -- Assemble code for the Zilog Z80 and ASCII R800 |
b90efa5b | 2 | Copyright (C) 2005-2015 Free Software Foundation, Inc. |
3c9b82ba NC |
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 | |
ec2655a6 | 9 | the Free Software Foundation; either version 3, or (at your option) |
3c9b82ba NC |
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" | |
3c9b82ba NC |
23 | #include "safe-ctype.h" |
24 | #include "subsegs.h" | |
3c9b82ba NC |
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, 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-undocument-instructions -warn-unportable-instructions.\n"); | |
160 | } | |
161 | ||
162 | static symbolS * zero; | |
163 | ||
25045f79 AM |
164 | struct reg_entry |
165 | { | |
166 | 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 | ||
3c9b82ba NC |
221 | void |
222 | md_begin (void) | |
223 | { | |
25045f79 | 224 | expressionS nul, reg; |
3c9b82ba | 225 | char * p; |
25045f79 AM |
226 | unsigned int i, j, k; |
227 | char buf[BUFLEN]; | |
3c9b82ba | 228 | |
25045f79 AM |
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 | } | |
3c9b82ba NC |
251 | p = input_line_pointer; |
252 | input_line_pointer = "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 | ||
3c9b82ba NC |
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 | case '"': | |
321 | for (quote = *p++; quote != *p && '\n' != *p; ++p) | |
322 | /* No escapes. */ ; | |
323 | if (quote != *p) | |
324 | { | |
325 | as_bad (_("-- unterminated string")); | |
326 | ignore_rest_of_line (); | |
327 | return 1; | |
328 | } | |
329 | break; | |
330 | } | |
331 | } | |
134dcee5 | 332 | /* Check for <label>[:] [.](EQU|DEFL) <value>. */ |
3c9b82ba NC |
333 | if (is_name_beginner (*input_line_pointer)) |
334 | { | |
335 | char c, *rest, *line_start; | |
336 | int len; | |
337 | ||
338 | line_start = input_line_pointer; | |
3c9b82ba NC |
339 | if (ignore_input ()) |
340 | return 0; | |
341 | ||
342 | c = get_symbol_end (); | |
343 | rest = input_line_pointer + 1; | |
344 | ||
345 | if (*rest == ':') | |
346 | ++rest; | |
347 | if (*rest == ' ' || *rest == '\t') | |
348 | ++rest; | |
134dcee5 AM |
349 | if (*rest == '.') |
350 | ++rest; | |
3c9b82ba NC |
351 | if (strncasecmp (rest, "EQU", 3) == 0) |
352 | len = 3; | |
353 | else if (strncasecmp (rest, "DEFL", 4) == 0) | |
354 | len = 4; | |
355 | else | |
356 | len = 0; | |
3c45a255 | 357 | if (len && (!ISALPHA(rest[len]) ) ) |
3c9b82ba NC |
358 | { |
359 | /* Handle assignment here. */ | |
3c9b82ba | 360 | if (line_start[-1] == '\n') |
f9eb6721 | 361 | { |
3c45a255 AM |
362 | bump_line_counters (); |
363 | LISTING_NEWLINE (); | |
f9eb6721 | 364 | } |
3c45a255 AM |
365 | input_line_pointer = rest + len - 1; |
366 | /* Allow redefining with "DEFL" (len == 4), but not with "EQU". */ | |
367 | equals (line_start, len == 4); | |
3c9b82ba NC |
368 | return 1; |
369 | } | |
370 | else | |
371 | { | |
372 | /* Restore line and pointer. */ | |
373 | *input_line_pointer = c; | |
374 | input_line_pointer = line_start; | |
375 | } | |
376 | } | |
377 | return 0; | |
378 | } | |
379 | ||
380 | symbolS * | |
381 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) | |
382 | { | |
383 | return NULL; | |
384 | } | |
385 | ||
386 | char * | |
387 | md_atof (int type ATTRIBUTE_UNUSED, char *litP ATTRIBUTE_UNUSED, | |
388 | int *sizeP ATTRIBUTE_UNUSED) | |
389 | { | |
390 | return _("floating point numbers are not implemented"); | |
391 | } | |
392 | ||
393 | valueT | |
394 | md_section_align (segT seg ATTRIBUTE_UNUSED, valueT size) | |
395 | { | |
396 | return size; | |
397 | } | |
398 | ||
399 | long | |
400 | md_pcrel_from (fixS * fixp) | |
401 | { | |
402 | return fixp->fx_where + | |
403 | fixp->fx_frag->fr_address + 1; | |
404 | } | |
405 | ||
406 | typedef const char * (asfunc)(char, char, const char*); | |
407 | ||
408 | typedef struct _table_t | |
409 | { | |
410 | char* name; | |
411 | char prefix; | |
412 | char opcode; | |
413 | asfunc * fp; | |
414 | } table_t; | |
415 | ||
416 | /* Compares the key for structs that start with a char * to the key. */ | |
417 | static int | |
418 | key_cmp (const void * a, const void * b) | |
419 | { | |
420 | const char *str_a, *str_b; | |
421 | ||
422 | str_a = *((const char**)a); | |
423 | str_b = *((const char**)b); | |
424 | return strcmp (str_a, str_b); | |
425 | } | |
426 | ||
3c9b82ba NC |
427 | char buf[BUFLEN]; |
428 | const char *key = buf; | |
429 | ||
3c9b82ba NC |
430 | /* Prevent an error on a line from also generating |
431 | a "junk at end of line" error message. */ | |
432 | static char err_flag; | |
433 | ||
434 | static void | |
435 | error (const char * message) | |
436 | { | |
20203fb9 | 437 | as_bad ("%s", message); |
3c9b82ba NC |
438 | err_flag = 1; |
439 | } | |
440 | ||
441 | static void | |
442 | ill_op (void) | |
443 | { | |
444 | error (_("illegal operand")); | |
445 | } | |
446 | ||
447 | static void | |
448 | wrong_mach (int ins_type) | |
449 | { | |
450 | const char *p; | |
451 | ||
452 | switch (ins_type) | |
453 | { | |
454 | case INS_UNDOC: | |
455 | p = "undocumented instruction"; | |
456 | break; | |
457 | case INS_UNPORT: | |
458 | p = "instruction does not work on R800"; | |
459 | break; | |
460 | case INS_R800: | |
461 | p = "instruction only works R800"; | |
462 | break; | |
463 | default: | |
134dcee5 | 464 | p = 0; /* Not reachable. */ |
3c9b82ba NC |
465 | } |
466 | ||
467 | if (ins_type & ins_err) | |
468 | error (_(p)); | |
469 | else | |
73812f59 | 470 | as_warn ("%s", _(p)); |
3c9b82ba NC |
471 | } |
472 | ||
473 | static void | |
474 | check_mach (int ins_type) | |
475 | { | |
476 | if ((ins_type & ins_ok) == 0) | |
477 | wrong_mach (ins_type); | |
478 | ins_used |= ins_type; | |
479 | } | |
480 | ||
3c9b82ba NC |
481 | /* Check whether an expression is indirect. */ |
482 | static int | |
483 | is_indir (const char *s) | |
484 | { | |
485 | char quote; | |
486 | const char *p; | |
487 | int indir, depth; | |
488 | ||
489 | /* Indirection is indicated with parentheses. */ | |
490 | indir = (*s == '('); | |
491 | ||
492 | for (p = s, depth = 0; *p && *p != ','; ++p) | |
493 | { | |
494 | switch (*p) | |
495 | { | |
496 | case '"': | |
497 | case '\'': | |
498 | for (quote = *p++; quote != *p && *p != '\n'; ++p) | |
499 | if (*p == '\\' && p[1]) | |
500 | ++p; | |
501 | break; | |
502 | case '(': | |
503 | ++ depth; | |
504 | break; | |
505 | case ')': | |
506 | -- depth; | |
507 | if (depth == 0) | |
508 | { | |
509 | p = skip_space (p + 1); | |
510 | if (*p && *p != ',') | |
511 | indir = 0; | |
512 | --p; | |
513 | } | |
514 | if (depth < 0) | |
515 | error (_("mismatched parentheses")); | |
516 | break; | |
517 | } | |
518 | } | |
519 | ||
520 | if (depth != 0) | |
521 | error (_("mismatched parentheses")); | |
522 | ||
523 | return indir; | |
524 | } | |
525 | ||
25045f79 AM |
526 | /* Check whether a symbol involves a register. */ |
527 | static int | |
528 | contains_register(symbolS *sym) | |
529 | { | |
530 | if (sym) | |
531 | { | |
532 | expressionS * ex = symbol_get_value_expression(sym); | |
533 | return (O_register == ex->X_op) | |
534 | || (ex->X_add_symbol && contains_register(ex->X_add_symbol)) | |
535 | || (ex->X_op_symbol && contains_register(ex->X_op_symbol)); | |
536 | } | |
537 | else | |
538 | return 0; | |
539 | } | |
540 | ||
541 | /* Parse general expression, not loooking for indexed adressing. */ | |
3c9b82ba | 542 | static const char * |
25045f79 | 543 | parse_exp_not_indexed (const char *s, expressionS *op) |
3c9b82ba NC |
544 | { |
545 | const char *p; | |
546 | int indir; | |
3c9b82ba NC |
547 | |
548 | p = skip_space (s); | |
549 | op->X_md = indir = is_indir (p); | |
25045f79 | 550 | input_line_pointer = (char*) s ; |
73812f59 | 551 | expression (op); |
25045f79 | 552 | switch (op->X_op) |
3c9b82ba | 553 | { |
25045f79 AM |
554 | case O_absent: |
555 | error (_("missing operand")); | |
556 | break; | |
557 | case O_illegal: | |
558 | error (_("bad expression syntax")); | |
559 | break; | |
abd58633 AM |
560 | default: |
561 | break; | |
3c9b82ba | 562 | } |
3c9b82ba NC |
563 | return input_line_pointer; |
564 | } | |
565 | ||
25045f79 | 566 | /* Parse expression, change operator to O_md1 for indexed addressing*/ |
3c9b82ba NC |
567 | static const char * |
568 | parse_exp (const char *s, expressionS *op) | |
569 | { | |
25045f79 AM |
570 | const char* res = parse_exp_not_indexed (s, op); |
571 | switch (op->X_op) | |
572 | { | |
573 | case O_add: | |
574 | case O_subtract: | |
575 | if (op->X_md && (O_register == symbol_get_value_expression(op->X_add_symbol)->X_op)) | |
576 | { | |
577 | int rnum = symbol_get_value_expression(op->X_add_symbol)->X_add_number; | |
578 | if ( ((REG_IX != rnum) && (REG_IY != rnum)) || contains_register(op->X_op_symbol) ) | |
579 | { | |
580 | ill_op(); | |
581 | } | |
582 | else | |
583 | { | |
584 | if (O_subtract == op->X_op) | |
585 | { | |
586 | expressionS minus; | |
587 | minus.X_op = O_uminus; | |
588 | minus.X_add_number = 0; | |
589 | minus.X_add_symbol = op->X_op_symbol; | |
590 | minus.X_op_symbol = 0; | |
591 | op->X_op_symbol = make_expr_symbol(&minus); | |
592 | op->X_op = O_add; | |
593 | } | |
594 | symbol_get_value_expression(op->X_op_symbol)->X_add_number += op->X_add_number; | |
595 | op->X_add_number = rnum; | |
596 | op->X_add_symbol = op->X_op_symbol; | |
597 | op->X_op_symbol = 0; | |
598 | op->X_op = O_md1; | |
599 | } | |
600 | } | |
601 | break; | |
602 | case O_register: | |
603 | if ( op->X_md && ((REG_IX == op->X_add_number)||(REG_IY == op->X_add_number)) ) | |
604 | { | |
605 | op->X_add_symbol = zero; | |
606 | op->X_op = O_md1; | |
607 | } | |
608 | break; | |
abd58633 AM |
609 | default: |
610 | break; | |
25045f79 AM |
611 | } |
612 | return res; | |
3c9b82ba NC |
613 | } |
614 | ||
615 | /* Condition codes, including some synonyms provided by HiTech zas. */ | |
616 | static const struct reg_entry cc_tab[] = | |
617 | { | |
618 | { "age", 6 << 3 }, | |
619 | { "alt", 7 << 3 }, | |
620 | { "c", 3 << 3 }, | |
621 | { "di", 4 << 3 }, | |
622 | { "ei", 5 << 3 }, | |
623 | { "lge", 2 << 3 }, | |
624 | { "llt", 3 << 3 }, | |
625 | { "m", 7 << 3 }, | |
626 | { "nc", 2 << 3 }, | |
627 | { "nz", 0 << 3 }, | |
628 | { "p", 6 << 3 }, | |
629 | { "pe", 5 << 3 }, | |
630 | { "po", 4 << 3 }, | |
631 | { "z", 1 << 3 }, | |
632 | } ; | |
633 | ||
634 | /* Parse condition code. */ | |
635 | static const char * | |
636 | parse_cc (const char *s, char * op) | |
637 | { | |
638 | const char *p; | |
639 | int i; | |
640 | struct reg_entry * cc_p; | |
641 | ||
642 | for (i = 0; i < BUFLEN; ++i) | |
643 | { | |
644 | if (!ISALPHA (s[i])) /* Condition codes consist of letters only. */ | |
645 | break; | |
646 | buf[i] = TOLOWER (s[i]); | |
647 | } | |
648 | ||
649 | if ((i < BUFLEN) | |
650 | && ((s[i] == 0) || (s[i] == ','))) | |
651 | { | |
652 | buf[i] = 0; | |
653 | cc_p = bsearch (&key, cc_tab, ARRAY_SIZE (cc_tab), | |
654 | sizeof (cc_tab[0]), key_cmp); | |
655 | } | |
656 | else | |
657 | cc_p = NULL; | |
658 | ||
659 | if (cc_p) | |
660 | { | |
661 | *op = cc_p->number; | |
662 | p = s + i; | |
663 | } | |
664 | else | |
665 | p = NULL; | |
666 | ||
667 | return p; | |
668 | } | |
669 | ||
670 | static const char * | |
671 | emit_insn (char prefix, char opcode, const char * args) | |
672 | { | |
673 | char *p; | |
674 | ||
675 | if (prefix) | |
676 | { | |
677 | p = frag_more (2); | |
678 | *p++ = prefix; | |
679 | } | |
680 | else | |
681 | p = frag_more (1); | |
682 | *p = opcode; | |
683 | return args; | |
684 | } | |
685 | ||
134dcee5 AM |
686 | void z80_cons_fix_new (fragS *frag_p, int offset, int nbytes, expressionS *exp) |
687 | { | |
688 | bfd_reloc_code_real_type r[4] = | |
689 | { | |
690 | BFD_RELOC_8, | |
691 | BFD_RELOC_16, | |
692 | BFD_RELOC_24, | |
693 | BFD_RELOC_32 | |
694 | }; | |
695 | ||
696 | if (nbytes < 1 || nbytes > 4) | |
697 | { | |
698 | as_bad (_("unsupported BFD relocation size %u"), nbytes); | |
699 | } | |
700 | else | |
701 | { | |
702 | fix_new_exp (frag_p, offset, nbytes, exp, 0, r[nbytes-1]); | |
703 | } | |
704 | } | |
705 | ||
3c9b82ba NC |
706 | static void |
707 | emit_byte (expressionS * val, bfd_reloc_code_real_type r_type) | |
708 | { | |
709 | char *p; | |
710 | int lo, hi; | |
3c9b82ba NC |
711 | |
712 | p = frag_more (1); | |
713 | *p = val->X_add_number; | |
25045f79 AM |
714 | if ( contains_register(val->X_add_symbol) || contains_register(val->X_op_symbol) ) |
715 | { | |
716 | ill_op(); | |
717 | } | |
718 | else if ((r_type == BFD_RELOC_8_PCREL) && (val->X_op == O_constant)) | |
134dcee5 | 719 | { |
20203fb9 | 720 | as_bad (_("cannot make a relative jump to an absolute location")); |
134dcee5 AM |
721 | } |
722 | else if (val->X_op == O_constant) | |
3c9b82ba NC |
723 | { |
724 | lo = -128; | |
725 | hi = (BFD_RELOC_8 == r_type) ? 255 : 127; | |
726 | ||
727 | if ((val->X_add_number < lo) || (val->X_add_number > hi)) | |
728 | { | |
729 | if (r_type == BFD_RELOC_Z80_DISP8) | |
730 | as_bad (_("offset too large")); | |
731 | else | |
732 | as_warn (_("overflow")); | |
733 | } | |
734 | } | |
735 | else | |
736 | { | |
73812f59 NC |
737 | fix_new_exp (frag_now, p - frag_now->fr_literal, 1, val, |
738 | (r_type == BFD_RELOC_8_PCREL) ? TRUE : FALSE, r_type); | |
3c9b82ba NC |
739 | /* FIXME : Process constant offsets immediately. */ |
740 | } | |
741 | } | |
742 | ||
743 | static void | |
744 | emit_word (expressionS * val) | |
745 | { | |
746 | char *p; | |
747 | ||
748 | p = frag_more (2); | |
749 | if ( (val->X_op == O_register) | |
25045f79 AM |
750 | || (val->X_op == O_md1) |
751 | || contains_register(val->X_add_symbol) | |
752 | || contains_register(val->X_op_symbol) ) | |
3c9b82ba NC |
753 | ill_op (); |
754 | else | |
755 | { | |
756 | *p = val->X_add_number; | |
757 | p[1] = (val->X_add_number>>8); | |
758 | if (val->X_op != O_constant) | |
759 | fix_new_exp (frag_now, p - frag_now->fr_literal, 2, | |
760 | val, FALSE, BFD_RELOC_16); | |
761 | } | |
762 | } | |
763 | ||
764 | static void | |
765 | emit_mx (char prefix, char opcode, int shift, expressionS * arg) | |
766 | /* The operand m may be r, (hl), (ix+d), (iy+d), | |
767 | if 0 == prefix m may also be ixl, ixh, iyl, iyh. */ | |
768 | { | |
769 | char *q; | |
770 | int rnum; | |
771 | ||
772 | rnum = arg->X_add_number; | |
773 | switch (arg->X_op) | |
774 | { | |
775 | case O_register: | |
776 | if (arg->X_md) | |
777 | { | |
778 | if (rnum != REG_HL) | |
779 | { | |
780 | ill_op (); | |
781 | break; | |
782 | } | |
783 | else | |
784 | rnum = 6; | |
785 | } | |
786 | else | |
787 | { | |
788 | if ((prefix == 0) && (rnum & R_INDEX)) | |
789 | { | |
790 | prefix = (rnum & R_IX) ? 0xDD : 0xFD; | |
791 | check_mach (INS_UNDOC); | |
792 | rnum &= ~R_INDEX; | |
793 | } | |
794 | if (rnum > 7) | |
795 | { | |
796 | ill_op (); | |
797 | break; | |
798 | } | |
799 | } | |
800 | q = frag_more (prefix ? 2 : 1); | |
801 | if (prefix) | |
802 | * q ++ = prefix; | |
803 | * q ++ = opcode + (rnum << shift); | |
804 | break; | |
805 | case O_md1: | |
806 | q = frag_more (2); | |
807 | *q++ = (rnum & R_IX) ? 0xDD : 0xFD; | |
808 | *q = (prefix) ? prefix : (opcode + (6 << shift)); | |
761025be AM |
809 | { |
810 | expressionS offset = *arg; | |
811 | offset.X_op = O_symbol; | |
812 | offset.X_add_number = 0; | |
813 | emit_byte (&offset, BFD_RELOC_Z80_DISP8); | |
814 | } | |
3c9b82ba NC |
815 | if (prefix) |
816 | { | |
817 | q = frag_more (1); | |
818 | *q = opcode+(6<<shift); | |
819 | } | |
820 | break; | |
821 | default: | |
822 | abort (); | |
823 | } | |
824 | } | |
825 | ||
826 | /* The operand m may be r, (hl), (ix+d), (iy+d), | |
827 | if 0 = prefix m may also be ixl, ixh, iyl, iyh. */ | |
828 | static const char * | |
829 | emit_m (char prefix, char opcode, const char *args) | |
830 | { | |
831 | expressionS arg_m; | |
832 | const char *p; | |
833 | ||
834 | p = parse_exp (args, &arg_m); | |
835 | switch (arg_m.X_op) | |
836 | { | |
837 | case O_md1: | |
838 | case O_register: | |
839 | emit_mx (prefix, opcode, 0, &arg_m); | |
840 | break; | |
841 | default: | |
842 | ill_op (); | |
843 | } | |
844 | return p; | |
845 | } | |
846 | ||
847 | /* The operand m may be as above or one of the undocumented | |
848 | combinations (ix+d),r and (iy+d),r (if unportable instructions | |
849 | are allowed). */ | |
850 | static const char * | |
851 | emit_mr (char prefix, char opcode, const char *args) | |
852 | { | |
853 | expressionS arg_m, arg_r; | |
854 | const char *p; | |
855 | ||
856 | p = parse_exp (args, & arg_m); | |
857 | ||
858 | switch (arg_m.X_op) | |
859 | { | |
860 | case O_md1: | |
861 | if (*p == ',') | |
862 | { | |
863 | p = parse_exp (p + 1, & arg_r); | |
864 | ||
865 | if ((arg_r.X_md == 0) | |
866 | && (arg_r.X_op == O_register) | |
867 | && (arg_r.X_add_number < 8)) | |
868 | opcode += arg_r.X_add_number-6; /* Emit_mx () will add 6. */ | |
869 | else | |
870 | { | |
871 | ill_op (); | |
872 | break; | |
873 | } | |
874 | check_mach (INS_UNPORT); | |
875 | } | |
876 | case O_register: | |
877 | emit_mx (prefix, opcode, 0, & arg_m); | |
878 | break; | |
879 | default: | |
880 | ill_op (); | |
881 | } | |
882 | return p; | |
883 | } | |
884 | ||
885 | static void | |
886 | emit_sx (char prefix, char opcode, expressionS * arg_p) | |
887 | { | |
888 | char *q; | |
889 | ||
890 | switch (arg_p->X_op) | |
891 | { | |
892 | case O_register: | |
893 | case O_md1: | |
894 | emit_mx (prefix, opcode, 0, arg_p); | |
895 | break; | |
896 | default: | |
897 | if (arg_p->X_md) | |
898 | ill_op (); | |
899 | else | |
900 | { | |
901 | q = frag_more (prefix ? 2 : 1); | |
902 | if (prefix) | |
903 | *q++ = prefix; | |
904 | *q = opcode ^ 0x46; | |
905 | emit_byte (arg_p, BFD_RELOC_8); | |
906 | } | |
907 | } | |
908 | } | |
909 | ||
910 | /* The operand s may be r, (hl), (ix+d), (iy+d), n. */ | |
911 | static const char * | |
912 | emit_s (char prefix, char opcode, const char *args) | |
913 | { | |
914 | expressionS arg_s; | |
915 | const char *p; | |
916 | ||
917 | p = parse_exp (args, & arg_s); | |
918 | emit_sx (prefix, opcode, & arg_s); | |
919 | return p; | |
920 | } | |
921 | ||
922 | static const char * | |
923 | emit_call (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) | |
924 | { | |
925 | expressionS addr; | |
926 | const char *p; char *q; | |
927 | ||
25045f79 | 928 | p = parse_exp_not_indexed (args, &addr); |
3c9b82ba NC |
929 | if (addr.X_md) |
930 | ill_op (); | |
931 | else | |
932 | { | |
933 | q = frag_more (1); | |
934 | *q = opcode; | |
935 | emit_word (& addr); | |
936 | } | |
937 | return p; | |
938 | } | |
939 | ||
940 | /* Operand may be rr, r, (hl), (ix+d), (iy+d). */ | |
941 | static const char * | |
942 | emit_incdec (char prefix, char opcode, const char * args) | |
943 | { | |
944 | expressionS operand; | |
945 | int rnum; | |
946 | const char *p; char *q; | |
947 | ||
948 | p = parse_exp (args, &operand); | |
949 | rnum = operand.X_add_number; | |
950 | if ((! operand.X_md) | |
951 | && (operand.X_op == O_register) | |
952 | && (R_ARITH&rnum)) | |
953 | { | |
954 | q = frag_more ((rnum & R_INDEX) ? 2 : 1); | |
955 | if (rnum & R_INDEX) | |
956 | *q++ = (rnum & R_IX) ? 0xDD : 0xFD; | |
957 | *q = prefix + ((rnum & 3) << 4); | |
958 | } | |
959 | else | |
960 | { | |
961 | if ((operand.X_op == O_md1) || (operand.X_op == O_register)) | |
962 | emit_mx (0, opcode, 3, & operand); | |
963 | else | |
964 | ill_op (); | |
965 | } | |
966 | return p; | |
967 | } | |
968 | ||
969 | static const char * | |
970 | emit_jr (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) | |
971 | { | |
972 | expressionS addr; | |
973 | const char *p; | |
974 | char *q; | |
975 | ||
25045f79 | 976 | p = parse_exp_not_indexed (args, &addr); |
3c9b82ba NC |
977 | if (addr.X_md) |
978 | ill_op (); | |
979 | else | |
980 | { | |
981 | q = frag_more (1); | |
982 | *q = opcode; | |
983 | emit_byte (&addr, BFD_RELOC_8_PCREL); | |
984 | } | |
985 | return p; | |
986 | } | |
987 | ||
988 | static const char * | |
989 | emit_jp (char prefix, char opcode, const char * args) | |
990 | { | |
991 | expressionS addr; | |
992 | const char *p; | |
993 | char *q; | |
994 | int rnum; | |
995 | ||
25045f79 | 996 | p = parse_exp_not_indexed (args, & addr); |
3c9b82ba NC |
997 | if (addr.X_md) |
998 | { | |
999 | rnum = addr.X_add_number; | |
25045f79 | 1000 | if ((O_register == addr.X_op) && (REG_HL == (rnum & ~R_INDEX))) |
3c9b82ba NC |
1001 | { |
1002 | q = frag_more ((rnum & R_INDEX) ? 2 : 1); | |
1003 | if (rnum & R_INDEX) | |
1004 | *q++ = (rnum & R_IX) ? 0xDD : 0xFD; | |
1005 | *q = prefix; | |
1006 | } | |
1007 | else | |
1008 | ill_op (); | |
1009 | } | |
1010 | else | |
1011 | { | |
1012 | q = frag_more (1); | |
1013 | *q = opcode; | |
1014 | emit_word (& addr); | |
1015 | } | |
1016 | return p; | |
1017 | } | |
1018 | ||
1019 | static const char * | |
1020 | emit_im (char prefix, char opcode, const char * args) | |
1021 | { | |
1022 | expressionS mode; | |
1023 | const char *p; | |
1024 | char *q; | |
1025 | ||
1026 | p = parse_exp (args, & mode); | |
1027 | if (mode.X_md || (mode.X_op != O_constant)) | |
1028 | ill_op (); | |
1029 | else | |
1030 | switch (mode.X_add_number) | |
1031 | { | |
1032 | case 1: | |
1033 | case 2: | |
1034 | ++mode.X_add_number; | |
1035 | /* Fall through. */ | |
1036 | case 0: | |
1037 | q = frag_more (2); | |
1038 | *q++ = prefix; | |
1039 | *q = opcode + 8*mode.X_add_number; | |
1040 | break; | |
1041 | default: | |
1042 | ill_op (); | |
1043 | } | |
1044 | return p; | |
1045 | } | |
1046 | ||
1047 | static const char * | |
1048 | emit_pop (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) | |
1049 | { | |
1050 | expressionS regp; | |
1051 | const char *p; | |
1052 | char *q; | |
1053 | ||
1054 | p = parse_exp (args, & regp); | |
1055 | if ((!regp.X_md) | |
1056 | && (regp.X_op == O_register) | |
1057 | && (regp.X_add_number & R_STACKABLE)) | |
1058 | { | |
1059 | int rnum; | |
1060 | ||
1061 | rnum = regp.X_add_number; | |
1062 | if (rnum&R_INDEX) | |
1063 | { | |
1064 | q = frag_more (2); | |
1065 | *q++ = (rnum&R_IX)?0xDD:0xFD; | |
1066 | } | |
1067 | else | |
1068 | q = frag_more (1); | |
1069 | *q = opcode + ((rnum & 3) << 4); | |
1070 | } | |
1071 | else | |
1072 | ill_op (); | |
1073 | ||
1074 | return p; | |
1075 | } | |
1076 | ||
1077 | static const char * | |
1078 | emit_retcc (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) | |
1079 | { | |
1080 | char cc, *q; | |
1081 | const char *p; | |
1082 | ||
1083 | p = parse_cc (args, &cc); | |
1084 | q = frag_more (1); | |
1085 | if (p) | |
1086 | *q = opcode + cc; | |
1087 | else | |
1088 | *q = prefix; | |
1089 | return p ? p : args; | |
1090 | } | |
1091 | ||
1092 | static const char * | |
1093 | emit_adc (char prefix, char opcode, const char * args) | |
1094 | { | |
1095 | expressionS term; | |
1096 | int rnum; | |
1097 | const char *p; | |
1098 | char *q; | |
1099 | ||
1100 | p = parse_exp (args, &term); | |
1101 | if (*p++ != ',') | |
1102 | { | |
9aff4b7a | 1103 | error (_("bad instruction syntax")); |
3c9b82ba NC |
1104 | return p; |
1105 | } | |
1106 | ||
1107 | if ((term.X_md) || (term.X_op != O_register)) | |
1108 | ill_op (); | |
1109 | else | |
1110 | switch (term.X_add_number) | |
1111 | { | |
1112 | case REG_A: | |
1113 | p = emit_s (0, prefix, p); | |
1114 | break; | |
1115 | case REG_HL: | |
1116 | p = parse_exp (p, &term); | |
1117 | if ((!term.X_md) && (term.X_op == O_register)) | |
1118 | { | |
1119 | rnum = term.X_add_number; | |
1120 | if (R_ARITH == (rnum & (R_ARITH | R_INDEX))) | |
1121 | { | |
1122 | q = frag_more (2); | |
1123 | *q++ = 0xED; | |
1124 | *q = opcode + ((rnum & 3) << 4); | |
1125 | break; | |
1126 | } | |
1127 | } | |
1128 | /* Fall through. */ | |
1129 | default: | |
1130 | ill_op (); | |
1131 | } | |
1132 | return p; | |
1133 | } | |
1134 | ||
1135 | static const char * | |
1136 | emit_add (char prefix, char opcode, const char * args) | |
1137 | { | |
1138 | expressionS term; | |
1139 | int lhs, rhs; | |
1140 | const char *p; | |
1141 | char *q; | |
1142 | ||
1143 | p = parse_exp (args, &term); | |
1144 | if (*p++ != ',') | |
1145 | { | |
9aff4b7a | 1146 | error (_("bad instruction syntax")); |
3c9b82ba NC |
1147 | return p; |
1148 | } | |
1149 | ||
1150 | if ((term.X_md) || (term.X_op != O_register)) | |
1151 | ill_op (); | |
1152 | else | |
1153 | switch (term.X_add_number & ~R_INDEX) | |
1154 | { | |
1155 | case REG_A: | |
1156 | p = emit_s (0, prefix, p); | |
1157 | break; | |
1158 | case REG_HL: | |
1159 | lhs = term.X_add_number; | |
1160 | p = parse_exp (p, &term); | |
1161 | if ((!term.X_md) && (term.X_op == O_register)) | |
1162 | { | |
1163 | rhs = term.X_add_number; | |
1164 | if ((rhs & R_ARITH) | |
1165 | && ((rhs == lhs) || ((rhs & ~R_INDEX) != REG_HL))) | |
1166 | { | |
1167 | q = frag_more ((lhs & R_INDEX) ? 2 : 1); | |
1168 | if (lhs & R_INDEX) | |
1169 | *q++ = (lhs & R_IX) ? 0xDD : 0xFD; | |
1170 | *q = opcode + ((rhs & 3) << 4); | |
1171 | break; | |
1172 | } | |
1173 | } | |
1174 | /* Fall through. */ | |
1175 | default: | |
1176 | ill_op (); | |
1177 | } | |
1178 | return p; | |
1179 | } | |
1180 | ||
1181 | static const char * | |
1182 | emit_bit (char prefix, char opcode, const char * args) | |
1183 | { | |
1184 | expressionS b; | |
1185 | int bn; | |
1186 | const char *p; | |
1187 | ||
1188 | p = parse_exp (args, &b); | |
1189 | if (*p++ != ',') | |
9aff4b7a | 1190 | error (_("bad instruction syntax")); |
3c9b82ba NC |
1191 | |
1192 | bn = b.X_add_number; | |
1193 | if ((!b.X_md) | |
1194 | && (b.X_op == O_constant) | |
1195 | && (0 <= bn) | |
1196 | && (bn < 8)) | |
1197 | { | |
1198 | if (opcode == 0x40) | |
1199 | /* Bit : no optional third operand. */ | |
1200 | p = emit_m (prefix, opcode + (bn << 3), p); | |
1201 | else | |
1202 | /* Set, res : resulting byte can be copied to register. */ | |
1203 | p = emit_mr (prefix, opcode + (bn << 3), p); | |
1204 | } | |
1205 | else | |
1206 | ill_op (); | |
1207 | return p; | |
1208 | } | |
1209 | ||
1210 | static const char * | |
1211 | emit_jpcc (char prefix, char opcode, const char * args) | |
1212 | { | |
1213 | char cc; | |
1214 | const char *p; | |
1215 | ||
1216 | p = parse_cc (args, & cc); | |
1217 | if (p && *p++ == ',') | |
1218 | p = emit_call (0, opcode + cc, p); | |
1219 | else | |
1220 | p = (prefix == (char)0xC3) | |
1221 | ? emit_jp (0xE9, prefix, args) | |
1222 | : emit_call (0, prefix, args); | |
1223 | return p; | |
1224 | } | |
1225 | ||
1226 | static const char * | |
1227 | emit_jrcc (char prefix, char opcode, const char * args) | |
1228 | { | |
1229 | char cc; | |
1230 | const char *p; | |
1231 | ||
1232 | p = parse_cc (args, &cc); | |
1233 | if (p && *p++ == ',') | |
1234 | { | |
1235 | if (cc > (3 << 3)) | |
1236 | error (_("condition code invalid for jr")); | |
1237 | else | |
1238 | p = emit_jr (0, opcode + cc, p); | |
1239 | } | |
1240 | else | |
1241 | p = emit_jr (0, prefix, args); | |
1242 | ||
1243 | return p; | |
1244 | } | |
1245 | ||
1246 | static const char * | |
1247 | emit_ex (char prefix_in ATTRIBUTE_UNUSED, | |
1248 | char opcode_in ATTRIBUTE_UNUSED, const char * args) | |
1249 | { | |
1250 | expressionS op; | |
1251 | const char * p; | |
1252 | char prefix, opcode; | |
1253 | ||
25045f79 | 1254 | p = parse_exp_not_indexed (args, &op); |
3c9b82ba NC |
1255 | p = skip_space (p); |
1256 | if (*p++ != ',') | |
1257 | { | |
1258 | error (_("bad instruction syntax")); | |
1259 | return p; | |
1260 | } | |
1261 | ||
1262 | prefix = opcode = 0; | |
1263 | if (op.X_op == O_register) | |
1264 | switch (op.X_add_number | (op.X_md ? 0x8000 : 0)) | |
1265 | { | |
1266 | case REG_AF: | |
1267 | if (TOLOWER (*p++) == 'a' && TOLOWER (*p++) == 'f') | |
1268 | { | |
1269 | /* The scrubber changes '\'' to '`' in this context. */ | |
1270 | if (*p == '`') | |
1271 | ++p; | |
1272 | opcode = 0x08; | |
1273 | } | |
1274 | break; | |
1275 | case REG_DE: | |
1276 | if (TOLOWER (*p++) == 'h' && TOLOWER (*p++) == 'l') | |
1277 | opcode = 0xEB; | |
1278 | break; | |
1279 | case REG_SP|0x8000: | |
1280 | p = parse_exp (p, & op); | |
1281 | if (op.X_op == O_register | |
1282 | && op.X_md == 0 | |
1283 | && (op.X_add_number & ~R_INDEX) == REG_HL) | |
1284 | { | |
1285 | opcode = 0xE3; | |
1286 | if (R_INDEX & op.X_add_number) | |
1287 | prefix = (R_IX & op.X_add_number) ? 0xDD : 0xFD; | |
1288 | } | |
1289 | break; | |
1290 | } | |
1291 | if (opcode) | |
1292 | emit_insn (prefix, opcode, p); | |
1293 | else | |
1294 | ill_op (); | |
1295 | ||
1296 | return p; | |
1297 | } | |
1298 | ||
1299 | static const char * | |
1300 | emit_in (char prefix ATTRIBUTE_UNUSED, char opcode ATTRIBUTE_UNUSED, | |
1301 | const char * args) | |
1302 | { | |
1303 | expressionS reg, port; | |
1304 | const char *p; | |
1305 | char *q; | |
1306 | ||
1307 | p = parse_exp (args, ®); | |
1308 | if (*p++ != ',') | |
1309 | { | |
9aff4b7a | 1310 | error (_("bad instruction syntax")); |
3c9b82ba NC |
1311 | return p; |
1312 | } | |
1313 | ||
1314 | p = parse_exp (p, &port); | |
1315 | if (reg.X_md == 0 | |
1316 | && reg.X_op == O_register | |
1317 | && (reg.X_add_number <= 7 || reg.X_add_number == REG_F) | |
1318 | && (port.X_md)) | |
1319 | { | |
1320 | if (port.X_op != O_md1 && port.X_op != O_register) | |
1321 | { | |
1322 | if (REG_A == reg.X_add_number) | |
1323 | { | |
1324 | q = frag_more (1); | |
1325 | *q = 0xDB; | |
1326 | emit_byte (&port, BFD_RELOC_8); | |
1327 | } | |
1328 | else | |
1329 | ill_op (); | |
1330 | } | |
1331 | else | |
1332 | { | |
1333 | if (port.X_add_number == REG_C) | |
1334 | { | |
1335 | if (reg.X_add_number == REG_F) | |
1336 | check_mach (INS_UNDOC); | |
1337 | else | |
1338 | { | |
1339 | q = frag_more (2); | |
1340 | *q++ = 0xED; | |
1341 | *q = 0x40|((reg.X_add_number&7)<<3); | |
1342 | } | |
1343 | } | |
1344 | else | |
1345 | ill_op (); | |
1346 | } | |
1347 | } | |
1348 | else | |
1349 | ill_op (); | |
1350 | return p; | |
1351 | } | |
1352 | ||
1353 | static const char * | |
1354 | emit_out (char prefix ATTRIBUTE_UNUSED, char opcode ATTRIBUTE_UNUSED, | |
1355 | const char * args) | |
1356 | { | |
1357 | expressionS reg, port; | |
1358 | const char *p; | |
1359 | char *q; | |
1360 | ||
1361 | p = parse_exp (args, & port); | |
1362 | if (*p++ != ',') | |
1363 | { | |
9aff4b7a | 1364 | error (_("bad instruction syntax")); |
3c9b82ba NC |
1365 | return p; |
1366 | } | |
1367 | p = parse_exp (p, ®); | |
1368 | if (!port.X_md) | |
1369 | { ill_op (); return p; } | |
1370 | /* Allow "out (c), 0" as unportable instruction. */ | |
1371 | if (reg.X_op == O_constant && reg.X_add_number == 0) | |
1372 | { | |
1373 | check_mach (INS_UNPORT); | |
1374 | reg.X_op = O_register; | |
1375 | reg.X_add_number = 6; | |
1376 | } | |
1377 | if (reg.X_md | |
1378 | || reg.X_op != O_register | |
1379 | || reg.X_add_number > 7) | |
1380 | ill_op (); | |
1381 | else | |
1382 | if (port.X_op != O_register && port.X_op != O_md1) | |
1383 | { | |
1384 | if (REG_A == reg.X_add_number) | |
1385 | { | |
1386 | q = frag_more (1); | |
1387 | *q = 0xD3; | |
1388 | emit_byte (&port, BFD_RELOC_8); | |
1389 | } | |
1390 | else | |
1391 | ill_op (); | |
1392 | } | |
1393 | else | |
1394 | { | |
1395 | if (REG_C == port.X_add_number) | |
1396 | { | |
1397 | q = frag_more (2); | |
1398 | *q++ = 0xED; | |
1399 | *q = 0x41 | (reg.X_add_number << 3); | |
1400 | } | |
1401 | else | |
1402 | ill_op (); | |
1403 | } | |
1404 | return p; | |
1405 | } | |
1406 | ||
1407 | static const char * | |
1408 | emit_rst (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) | |
1409 | { | |
1410 | expressionS addr; | |
1411 | const char *p; | |
1412 | char *q; | |
1413 | ||
25045f79 | 1414 | p = parse_exp_not_indexed (args, &addr); |
3c9b82ba NC |
1415 | if (addr.X_op != O_constant) |
1416 | { | |
1417 | error ("rst needs constant address"); | |
1418 | return p; | |
1419 | } | |
1420 | ||
1421 | if (addr.X_add_number & ~(7 << 3)) | |
1422 | ill_op (); | |
1423 | else | |
1424 | { | |
1425 | q = frag_more (1); | |
1426 | *q = opcode + (addr.X_add_number & (7 << 3)); | |
1427 | } | |
1428 | return p; | |
1429 | } | |
1430 | ||
1431 | static void | |
1432 | emit_ldxhl (char prefix, char opcode, expressionS *src, expressionS *d) | |
1433 | { | |
1434 | char *q; | |
1435 | ||
1436 | if (src->X_md) | |
1437 | ill_op (); | |
1438 | else | |
1439 | { | |
1440 | if (src->X_op == O_register) | |
1441 | { | |
1442 | if (src->X_add_number>7) | |
1443 | ill_op (); | |
1444 | if (prefix) | |
1445 | { | |
1446 | q = frag_more (2); | |
1447 | *q++ = prefix; | |
1448 | } | |
1449 | else | |
1450 | q = frag_more (1); | |
1451 | *q = opcode + src->X_add_number; | |
1452 | if (d) | |
1453 | emit_byte (d, BFD_RELOC_Z80_DISP8); | |
1454 | } | |
1455 | else | |
1456 | { | |
1457 | if (prefix) | |
1458 | { | |
1459 | q = frag_more (2); | |
1460 | *q++ = prefix; | |
1461 | } | |
1462 | else | |
1463 | q = frag_more (1); | |
1464 | *q = opcode^0x46; | |
1465 | if (d) | |
1466 | emit_byte (d, BFD_RELOC_Z80_DISP8); | |
1467 | emit_byte (src, BFD_RELOC_8); | |
1468 | } | |
1469 | } | |
1470 | } | |
1471 | ||
1472 | static void | |
1473 | emit_ldreg (int dest, expressionS * src) | |
1474 | { | |
1475 | char *q; | |
1476 | int rnum; | |
1477 | ||
1478 | switch (dest) | |
1479 | { | |
1480 | /* 8 Bit ld group: */ | |
1481 | case REG_I: | |
1482 | case REG_R: | |
1483 | if (src->X_md == 0 && src->X_op == O_register && src->X_add_number == REG_A) | |
1484 | { | |
1485 | q = frag_more (2); | |
1486 | *q++ = 0xED; | |
1487 | *q = (dest == REG_I) ? 0x47 : 0x4F; | |
1488 | } | |
1489 | else | |
1490 | ill_op (); | |
1491 | break; | |
1492 | ||
1493 | case REG_A: | |
1494 | if ((src->X_md) && src->X_op != O_register && src->X_op != O_md1) | |
1495 | { | |
1496 | q = frag_more (1); | |
1497 | *q = 0x3A; | |
1498 | emit_word (src); | |
1499 | break; | |
1500 | } | |
1501 | ||
1502 | if ((src->X_md) | |
1503 | && src->X_op == O_register | |
1504 | && (src->X_add_number == REG_BC || src->X_add_number == REG_DE)) | |
1505 | { | |
1506 | q = frag_more (1); | |
2cf402d6 | 1507 | *q = 0x0A + ((src->X_add_number & 1) << 4); |
3c9b82ba NC |
1508 | break; |
1509 | } | |
1510 | ||
1511 | if ((!src->X_md) | |
1512 | && src->X_op == O_register | |
1513 | && (src->X_add_number == REG_R || src->X_add_number == REG_I)) | |
1514 | { | |
1515 | q = frag_more (2); | |
1516 | *q++ = 0xED; | |
1517 | *q = (src->X_add_number == REG_I) ? 0x57 : 0x5F; | |
1518 | break; | |
1519 | } | |
1520 | /* Fall through. */ | |
1521 | case REG_B: | |
1522 | case REG_C: | |
1523 | case REG_D: | |
1524 | case REG_E: | |
1525 | emit_sx (0, 0x40 + (dest << 3), src); | |
1526 | break; | |
1527 | ||
1528 | case REG_H: | |
1529 | case REG_L: | |
1530 | if ((src->X_md == 0) | |
1531 | && (src->X_op == O_register) | |
1532 | && (src->X_add_number & R_INDEX)) | |
1533 | ill_op (); | |
1534 | else | |
1535 | emit_sx (0, 0x40 + (dest << 3), src); | |
1536 | break; | |
1537 | ||
1538 | case R_IX | REG_H: | |
1539 | case R_IX | REG_L: | |
1540 | case R_IY | REG_H: | |
1541 | case R_IY | REG_L: | |
1542 | if (src->X_md) | |
1543 | { | |
1544 | ill_op (); | |
1545 | break; | |
1546 | } | |
1547 | check_mach (INS_UNDOC); | |
1548 | if (src-> X_op == O_register) | |
1549 | { | |
1550 | rnum = src->X_add_number; | |
1551 | if ((rnum & ~R_INDEX) < 8 | |
1552 | && ((rnum & R_INDEX) == (dest & R_INDEX) | |
1553 | || ( (rnum & ~R_INDEX) != REG_H | |
1554 | && (rnum & ~R_INDEX) != REG_L))) | |
1555 | { | |
1556 | q = frag_more (2); | |
1557 | *q++ = (dest & R_IX) ? 0xDD : 0xFD; | |
1558 | *q = 0x40 + ((dest & 0x07) << 3) + (rnum & 7); | |
1559 | } | |
1560 | else | |
1561 | ill_op (); | |
1562 | } | |
1563 | else | |
1564 | { | |
1565 | q = frag_more (2); | |
1566 | *q++ = (dest & R_IX) ? 0xDD : 0xFD; | |
1567 | *q = 0x06 + ((dest & 0x07) << 3); | |
1568 | emit_byte (src, BFD_RELOC_8); | |
1569 | } | |
1570 | break; | |
1571 | ||
1572 | /* 16 Bit ld group: */ | |
1573 | case REG_SP: | |
1574 | if (src->X_md == 0 | |
1575 | && src->X_op == O_register | |
1576 | && REG_HL == (src->X_add_number &~ R_INDEX)) | |
1577 | { | |
1578 | q = frag_more ((src->X_add_number & R_INDEX) ? 2 : 1); | |
1579 | if (src->X_add_number & R_INDEX) | |
1580 | *q++ = (src->X_add_number & R_IX) ? 0xDD : 0xFD; | |
1581 | *q = 0xF9; | |
1582 | break; | |
1583 | } | |
1584 | /* Fall through. */ | |
1585 | case REG_BC: | |
1586 | case REG_DE: | |
7fbe7b46 | 1587 | if (src->X_op == O_register || src->X_op == O_md1) |
3c9b82ba NC |
1588 | ill_op (); |
1589 | q = frag_more (src->X_md ? 2 : 1); | |
1590 | if (src->X_md) | |
1591 | { | |
1592 | *q++ = 0xED; | |
1593 | *q = 0x4B + ((dest & 3) << 4); | |
1594 | } | |
1595 | else | |
1596 | *q = 0x01 + ((dest & 3) << 4); | |
1597 | emit_word (src); | |
1598 | break; | |
1599 | ||
1600 | case REG_HL: | |
1601 | case REG_HL | R_IX: | |
1602 | case REG_HL | R_IY: | |
1603 | if (src->X_op == O_register || src->X_op == O_md1) | |
1604 | ill_op (); | |
1605 | q = frag_more ((dest & R_INDEX) ? 2 : 1); | |
1606 | if (dest & R_INDEX) | |
1607 | * q ++ = (dest & R_IX) ? 0xDD : 0xFD; | |
1608 | *q = (src->X_md) ? 0x2A : 0x21; | |
1609 | emit_word (src); | |
1610 | break; | |
1611 | ||
1612 | case REG_AF: | |
1613 | case REG_F: | |
1614 | ill_op (); | |
1615 | break; | |
1616 | ||
1617 | default: | |
1618 | abort (); | |
1619 | } | |
1620 | } | |
1621 | ||
1622 | static const char * | |
1623 | emit_ld (char prefix_in ATTRIBUTE_UNUSED, char opcode_in ATTRIBUTE_UNUSED, | |
1624 | const char * args) | |
1625 | { | |
1626 | expressionS dst, src; | |
1627 | const char *p; | |
1628 | char *q; | |
1629 | char prefix, opcode; | |
1630 | ||
1631 | p = parse_exp (args, &dst); | |
1632 | if (*p++ != ',') | |
9aff4b7a | 1633 | error (_("bad instruction syntax")); |
3c9b82ba NC |
1634 | p = parse_exp (p, &src); |
1635 | ||
1636 | switch (dst.X_op) | |
1637 | { | |
1638 | case O_md1: | |
761025be AM |
1639 | { |
1640 | expressionS dst_offset = dst; | |
1641 | dst_offset.X_op = O_symbol; | |
1642 | dst_offset.X_add_number = 0; | |
1643 | emit_ldxhl ((dst.X_add_number & R_IX) ? 0xDD : 0xFD, 0x70, | |
1644 | &src, &dst_offset); | |
1645 | } | |
3c9b82ba NC |
1646 | break; |
1647 | ||
1648 | case O_register: | |
1649 | if (dst.X_md) | |
1650 | { | |
1651 | switch (dst.X_add_number) | |
1652 | { | |
1653 | case REG_BC: | |
1654 | case REG_DE: | |
1655 | if (src.X_md == 0 && src.X_op == O_register && src.X_add_number == REG_A) | |
1656 | { | |
1657 | q = frag_more (1); | |
1658 | *q = 0x02 + ( (dst.X_add_number & 1) << 4); | |
1659 | } | |
1660 | else | |
1661 | ill_op (); | |
1662 | break; | |
1663 | case REG_HL: | |
1664 | emit_ldxhl (0, 0x70, &src, NULL); | |
1665 | break; | |
1666 | default: | |
1667 | ill_op (); | |
1668 | } | |
1669 | } | |
1670 | else | |
1671 | emit_ldreg (dst.X_add_number, &src); | |
1672 | break; | |
1673 | ||
1674 | default: | |
1675 | if (src.X_md != 0 || src.X_op != O_register) | |
1676 | ill_op (); | |
1677 | prefix = opcode = 0; | |
1678 | switch (src.X_add_number) | |
1679 | { | |
1680 | case REG_A: | |
1681 | opcode = 0x32; break; | |
1682 | case REG_BC: case REG_DE: case REG_SP: | |
1683 | prefix = 0xED; opcode = 0x43 + ((src.X_add_number&3)<<4); break; | |
1684 | case REG_HL: | |
1685 | opcode = 0x22; break; | |
1686 | case REG_HL|R_IX: | |
1687 | prefix = 0xDD; opcode = 0x22; break; | |
1688 | case REG_HL|R_IY: | |
1689 | prefix = 0xFD; opcode = 0x22; break; | |
1690 | } | |
1691 | if (opcode) | |
1692 | { | |
1693 | q = frag_more (prefix?2:1); | |
1694 | if (prefix) | |
1695 | *q++ = prefix; | |
1696 | *q = opcode; | |
1697 | emit_word (&dst); | |
1698 | } | |
1699 | else | |
1700 | ill_op (); | |
1701 | } | |
1702 | return p; | |
1703 | } | |
1704 | ||
134dcee5 AM |
1705 | static void |
1706 | emit_data (int size ATTRIBUTE_UNUSED) | |
3c9b82ba NC |
1707 | { |
1708 | const char *p, *q; | |
1709 | char *u, quote; | |
1710 | int cnt; | |
1711 | expressionS exp; | |
1712 | ||
134dcee5 AM |
1713 | if (is_it_end_of_statement ()) |
1714 | { | |
1715 | demand_empty_rest_of_line (); | |
1716 | return; | |
1717 | } | |
1718 | p = skip_space (input_line_pointer); | |
3c9b82ba | 1719 | |
134dcee5 | 1720 | do |
3c9b82ba NC |
1721 | { |
1722 | if (*p == '\"' || *p == '\'') | |
1723 | { | |
134dcee5 AM |
1724 | for (quote = *p, q = ++p, cnt = 0; *p && quote != *p; ++p, ++cnt) |
1725 | ; | |
1726 | u = frag_more (cnt); | |
1727 | memcpy (u, q, cnt); | |
1728 | if (!*p) | |
1729 | as_warn (_("unterminated string")); | |
1730 | else | |
1731 | p = skip_space (p+1); | |
3c9b82ba NC |
1732 | } |
1733 | else | |
1734 | { | |
1735 | p = parse_exp (p, &exp); | |
1736 | if (exp.X_op == O_md1 || exp.X_op == O_register) | |
1737 | { | |
1738 | ill_op (); | |
1739 | break; | |
1740 | } | |
1741 | if (exp.X_md) | |
1742 | as_warn (_("parentheses ignored")); | |
134dcee5 | 1743 | emit_byte (&exp, BFD_RELOC_8); |
3c9b82ba NC |
1744 | p = skip_space (p); |
1745 | } | |
3c9b82ba | 1746 | } |
134dcee5 AM |
1747 | while (*p++ == ',') ; |
1748 | input_line_pointer = (char *)(p-1); | |
3c9b82ba NC |
1749 | } |
1750 | ||
1751 | static const char * | |
1752 | emit_mulub (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) | |
1753 | { | |
1754 | const char *p; | |
1755 | ||
1756 | p = skip_space (args); | |
1757 | if (TOLOWER (*p++) != 'a' || *p++ != ',') | |
1758 | ill_op (); | |
1759 | else | |
1760 | { | |
1761 | char *q, reg; | |
1762 | ||
1763 | reg = TOLOWER (*p++); | |
1764 | switch (reg) | |
1765 | { | |
1766 | case 'b': | |
1767 | case 'c': | |
1768 | case 'd': | |
1769 | case 'e': | |
1770 | check_mach (INS_R800); | |
1771 | if (!*skip_space (p)) | |
1772 | { | |
1773 | q = frag_more (2); | |
1774 | *q++ = prefix; | |
1775 | *q = opcode + ((reg - 'b') << 3); | |
1776 | break; | |
1777 | } | |
1778 | default: | |
1779 | ill_op (); | |
1780 | } | |
1781 | } | |
1782 | return p; | |
1783 | } | |
1784 | ||
1785 | static const char * | |
1786 | emit_muluw (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) | |
1787 | { | |
1788 | const char *p; | |
1789 | ||
1790 | p = skip_space (args); | |
1791 | if (TOLOWER (*p++) != 'h' || TOLOWER (*p++) != 'l' || *p++ != ',') | |
1792 | ill_op (); | |
1793 | else | |
1794 | { | |
1795 | expressionS reg; | |
1796 | char *q; | |
1797 | ||
1798 | p = parse_exp (p, & reg); | |
1799 | ||
1800 | if ((!reg.X_md) && reg.X_op == O_register) | |
1801 | switch (reg.X_add_number) | |
1802 | { | |
1803 | case REG_BC: | |
1804 | case REG_SP: | |
1805 | check_mach (INS_R800); | |
1806 | q = frag_more (2); | |
1807 | *q++ = prefix; | |
1808 | *q = opcode + ((reg.X_add_number & 3) << 4); | |
1809 | break; | |
1810 | default: | |
1811 | ill_op (); | |
1812 | } | |
1813 | } | |
1814 | return p; | |
1815 | } | |
1816 | ||
134dcee5 AM |
1817 | /* Port specific pseudo ops. */ |
1818 | const pseudo_typeS md_pseudo_table[] = | |
1819 | { | |
1820 | { "db" , emit_data, 1}, | |
1821 | { "d24", cons, 3}, | |
1822 | { "d32", cons, 4}, | |
1823 | { "def24", cons, 3}, | |
1824 | { "def32", cons, 4}, | |
1825 | { "defb", emit_data, 1}, | |
1826 | { "defs", s_space, 1}, /* Synonym for ds on some assemblers. */ | |
1827 | { "defw", cons, 2}, | |
1828 | { "ds", s_space, 1}, /* Fill with bytes rather than words. */ | |
1829 | { "dw", cons, 2}, | |
1830 | { "psect", obj_coff_section, 0}, /* TODO: Translate attributes. */ | |
1831 | { "set", 0, 0}, /* Real instruction on z80. */ | |
1832 | { NULL, 0, 0 } | |
1833 | } ; | |
1834 | ||
3c9b82ba NC |
1835 | static table_t instab[] = |
1836 | { | |
1837 | { "adc", 0x88, 0x4A, emit_adc }, | |
1838 | { "add", 0x80, 0x09, emit_add }, | |
1839 | { "and", 0x00, 0xA0, emit_s }, | |
1840 | { "bit", 0xCB, 0x40, emit_bit }, | |
1841 | { "call", 0xCD, 0xC4, emit_jpcc }, | |
1842 | { "ccf", 0x00, 0x3F, emit_insn }, | |
1843 | { "cp", 0x00, 0xB8, emit_s }, | |
1844 | { "cpd", 0xED, 0xA9, emit_insn }, | |
1845 | { "cpdr", 0xED, 0xB9, emit_insn }, | |
1846 | { "cpi", 0xED, 0xA1, emit_insn }, | |
1847 | { "cpir", 0xED, 0xB1, emit_insn }, | |
1848 | { "cpl", 0x00, 0x2F, emit_insn }, | |
1849 | { "daa", 0x00, 0x27, emit_insn }, | |
3c9b82ba | 1850 | { "dec", 0x0B, 0x05, emit_incdec }, |
3c9b82ba NC |
1851 | { "di", 0x00, 0xF3, emit_insn }, |
1852 | { "djnz", 0x00, 0x10, emit_jr }, | |
3c9b82ba NC |
1853 | { "ei", 0x00, 0xFB, emit_insn }, |
1854 | { "ex", 0x00, 0x00, emit_ex}, | |
1855 | { "exx", 0x00, 0xD9, emit_insn }, | |
1856 | { "halt", 0x00, 0x76, emit_insn }, | |
1857 | { "im", 0xED, 0x46, emit_im }, | |
1858 | { "in", 0x00, 0x00, emit_in }, | |
1859 | { "inc", 0x03, 0x04, emit_incdec }, | |
1860 | { "ind", 0xED, 0xAA, emit_insn }, | |
1861 | { "indr", 0xED, 0xBA, emit_insn }, | |
1862 | { "ini", 0xED, 0xA2, emit_insn }, | |
1863 | { "inir", 0xED, 0xB2, emit_insn }, | |
1864 | { "jp", 0xC3, 0xC2, emit_jpcc }, | |
1865 | { "jr", 0x18, 0x20, emit_jrcc }, | |
1866 | { "ld", 0x00, 0x00, emit_ld }, | |
1867 | { "ldd", 0xED, 0xA8, emit_insn }, | |
1868 | { "lddr", 0xED, 0xB8, emit_insn }, | |
1869 | { "ldi", 0xED, 0xA0, emit_insn }, | |
1870 | { "ldir", 0xED, 0xB0, emit_insn }, | |
1871 | { "mulub", 0xED, 0xC5, emit_mulub }, /* R800 only. */ | |
1872 | { "muluw", 0xED, 0xC3, emit_muluw }, /* R800 only. */ | |
1873 | { "neg", 0xed, 0x44, emit_insn }, | |
1874 | { "nop", 0x00, 0x00, emit_insn }, | |
1875 | { "or", 0x00, 0xB0, emit_s }, | |
1876 | { "otdr", 0xED, 0xBB, emit_insn }, | |
1877 | { "otir", 0xED, 0xB3, emit_insn }, | |
1878 | { "out", 0x00, 0x00, emit_out }, | |
1879 | { "outd", 0xED, 0xAB, emit_insn }, | |
1880 | { "outi", 0xED, 0xA3, emit_insn }, | |
1881 | { "pop", 0x00, 0xC1, emit_pop }, | |
1882 | { "push", 0x00, 0xC5, emit_pop }, | |
1883 | { "res", 0xCB, 0x80, emit_bit }, | |
1884 | { "ret", 0xC9, 0xC0, emit_retcc }, | |
1885 | { "reti", 0xED, 0x4D, emit_insn }, | |
1886 | { "retn", 0xED, 0x45, emit_insn }, | |
1887 | { "rl", 0xCB, 0x10, emit_mr }, | |
1888 | { "rla", 0x00, 0x17, emit_insn }, | |
1889 | { "rlc", 0xCB, 0x00, emit_mr }, | |
1890 | { "rlca", 0x00, 0x07, emit_insn }, | |
1891 | { "rld", 0xED, 0x6F, emit_insn }, | |
1892 | { "rr", 0xCB, 0x18, emit_mr }, | |
1893 | { "rra", 0x00, 0x1F, emit_insn }, | |
1894 | { "rrc", 0xCB, 0x08, emit_mr }, | |
1895 | { "rrca", 0x00, 0x0F, emit_insn }, | |
1896 | { "rrd", 0xED, 0x67, emit_insn }, | |
1897 | { "rst", 0x00, 0xC7, emit_rst}, | |
1898 | { "sbc", 0x98, 0x42, emit_adc }, | |
1899 | { "scf", 0x00, 0x37, emit_insn }, | |
1900 | { "set", 0xCB, 0xC0, emit_bit }, | |
1901 | { "sla", 0xCB, 0x20, emit_mr }, | |
1902 | { "sli", 0xCB, 0x30, emit_mr }, | |
1903 | { "sll", 0xCB, 0x30, emit_mr }, | |
1904 | { "sra", 0xCB, 0x28, emit_mr }, | |
1905 | { "srl", 0xCB, 0x38, emit_mr }, | |
1906 | { "sub", 0x00, 0x90, emit_s }, | |
1907 | { "xor", 0x00, 0xA8, emit_s }, | |
1908 | } ; | |
1909 | ||
1910 | void | |
1911 | md_assemble (char* str) | |
1912 | { | |
1913 | const char *p; | |
1914 | char * old_ptr; | |
1915 | int i; | |
1916 | table_t *insp; | |
1917 | ||
1918 | err_flag = 0; | |
1919 | old_ptr = input_line_pointer; | |
1920 | p = skip_space (str); | |
1921 | for (i = 0; (i < BUFLEN) && (ISALPHA (*p));) | |
1922 | buf[i++] = TOLOWER (*p++); | |
1923 | ||
134dcee5 AM |
1924 | if (i == BUFLEN) |
1925 | { | |
1926 | buf[BUFLEN-3] = buf[BUFLEN-2] = '.'; /* Mark opcode as abbreviated. */ | |
1927 | buf[BUFLEN-1] = 0; | |
1928 | as_bad (_("Unknown instruction '%s'"), buf); | |
1929 | } | |
1930 | else if ((*p) && (!ISSPACE (*p))) | |
1931 | as_bad (_("syntax error")); | |
1932 | else | |
3c9b82ba | 1933 | { |
134dcee5 | 1934 | buf[i] = 0; |
3c9b82ba | 1935 | p = skip_space (p); |
134dcee5 AM |
1936 | key = buf; |
1937 | ||
1938 | insp = bsearch (&key, instab, ARRAY_SIZE (instab), | |
1939 | sizeof (instab[0]), key_cmp); | |
1940 | if (!insp) | |
1941 | as_bad (_("Unknown instruction '%s'"), buf); | |
1942 | else | |
1943 | { | |
1944 | p = insp->fp (insp->prefix, insp->opcode, p); | |
1945 | p = skip_space (p); | |
1946 | if ((!err_flag) && *p) | |
1947 | as_bad (_("junk at end of line, first unrecognized character is `%c'"), | |
1948 | *p); | |
1949 | } | |
3c9b82ba NC |
1950 | } |
1951 | input_line_pointer = old_ptr; | |
1952 | } | |
1953 | ||
1954 | void | |
1955 | md_apply_fix (fixS * fixP, valueT* valP, segT seg ATTRIBUTE_UNUSED) | |
1956 | { | |
1957 | long val = * (long *) valP; | |
de6d4f05 | 1958 | char *p_lit = fixP->fx_where + fixP->fx_frag->fr_literal; |
3c9b82ba NC |
1959 | |
1960 | switch (fixP->fx_r_type) | |
1961 | { | |
1962 | case BFD_RELOC_8_PCREL: | |
1963 | if (fixP->fx_addsy) | |
1964 | { | |
1965 | fixP->fx_no_overflow = 1; | |
1966 | fixP->fx_done = 0; | |
1967 | } | |
1968 | else | |
1969 | { | |
1970 | fixP->fx_no_overflow = (-128 <= val && val < 128); | |
1971 | if (!fixP->fx_no_overflow) | |
1972 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1973 | _("relative jump out of range")); | |
de6d4f05 | 1974 | *p_lit++ = val; |
3c9b82ba NC |
1975 | fixP->fx_done = 1; |
1976 | } | |
1977 | break; | |
1978 | ||
1979 | case BFD_RELOC_Z80_DISP8: | |
1980 | if (fixP->fx_addsy) | |
1981 | { | |
1982 | fixP->fx_no_overflow = 1; | |
1983 | fixP->fx_done = 0; | |
1984 | } | |
1985 | else | |
1986 | { | |
1987 | fixP->fx_no_overflow = (-128 <= val && val < 128); | |
1988 | if (!fixP->fx_no_overflow) | |
1989 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1990 | _("index offset out of range")); | |
de6d4f05 | 1991 | *p_lit++ = val; |
3c9b82ba NC |
1992 | fixP->fx_done = 1; |
1993 | } | |
1994 | break; | |
1995 | ||
1996 | case BFD_RELOC_8: | |
1997 | if (val > 255 || val < -128) | |
1998 | as_warn_where (fixP->fx_file, fixP->fx_line, _("overflow")); | |
de6d4f05 | 1999 | *p_lit++ = val; |
134dcee5 | 2000 | fixP->fx_no_overflow = 1; |
3c9b82ba NC |
2001 | if (fixP->fx_addsy == NULL) |
2002 | fixP->fx_done = 1; | |
2003 | break; | |
2004 | ||
2005 | case BFD_RELOC_16: | |
de6d4f05 AM |
2006 | *p_lit++ = val; |
2007 | *p_lit++ = (val >> 8); | |
134dcee5 AM |
2008 | fixP->fx_no_overflow = 1; |
2009 | if (fixP->fx_addsy == NULL) | |
2010 | fixP->fx_done = 1; | |
2011 | break; | |
2012 | ||
2013 | case BFD_RELOC_24: /* Def24 may produce this. */ | |
de6d4f05 AM |
2014 | *p_lit++ = val; |
2015 | *p_lit++ = (val >> 8); | |
2016 | *p_lit++ = (val >> 16); | |
134dcee5 | 2017 | fixP->fx_no_overflow = 1; |
3c9b82ba NC |
2018 | if (fixP->fx_addsy == NULL) |
2019 | fixP->fx_done = 1; | |
2020 | break; | |
2021 | ||
134dcee5 | 2022 | case BFD_RELOC_32: /* Def32 and .long may produce this. */ |
de6d4f05 AM |
2023 | *p_lit++ = val; |
2024 | *p_lit++ = (val >> 8); | |
2025 | *p_lit++ = (val >> 16); | |
2026 | *p_lit++ = (val >> 24); | |
3c9b82ba NC |
2027 | if (fixP->fx_addsy == NULL) |
2028 | fixP->fx_done = 1; | |
2029 | break; | |
2030 | ||
2031 | default: | |
2032 | printf (_("md_apply_fix: unknown r_type 0x%x\n"), fixP->fx_r_type); | |
2033 | abort (); | |
2034 | } | |
2035 | } | |
2036 | ||
2037 | /* GAS will call this to generate a reloc. GAS will pass the | |
2038 | resulting reloc to `bfd_install_relocation'. This currently works | |
2039 | poorly, as `bfd_install_relocation' often does the wrong thing, and | |
2040 | instances of `tc_gen_reloc' have been written to work around the | |
2041 | problems, which in turns makes it difficult to fix | |
2042 | `bfd_install_relocation'. */ | |
2043 | ||
2044 | /* If while processing a fixup, a reloc really | |
2045 | needs to be created then it is done here. */ | |
2046 | ||
2047 | arelent * | |
2048 | tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED , fixS *fixp) | |
2049 | { | |
2050 | arelent *reloc; | |
2051 | ||
2052 | if (! bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type)) | |
2053 | { | |
2054 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2055 | _("reloc %d not supported by object file format"), | |
2056 | (int) fixp->fx_r_type); | |
2057 | return NULL; | |
2058 | } | |
2059 | ||
2060 | reloc = xmalloc (sizeof (arelent)); | |
2061 | reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); | |
2062 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
2063 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
2064 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
2065 | reloc->addend = fixp->fx_offset; | |
2066 | ||
2067 | return reloc; | |
2068 | } |