Commit | Line | Data |
---|---|---|
3c9b82ba NC |
1 | /* tc-z80.c -- Assemble code for the Zilog Z80 and ASCII R800 |
2 | Copyright 2005 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 2, 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 "listing.h" | |
24 | #include "bfd.h" | |
25 | #include "safe-ctype.h" | |
26 | #include "subsegs.h" | |
27 | #include "symbols.h" | |
28 | #include "libiberty.h" | |
29 | ||
30 | /* Exported constants. */ | |
31 | const char comment_chars[] = ";\0"; | |
32 | const char line_comment_chars[] = "#;\0"; | |
33 | const char line_separator_chars[] = "\0"; | |
34 | const char EXP_CHARS[] = "eE\0"; | |
35 | const char FLT_CHARS[] = "RrFf\0"; | |
36 | ||
37 | /* For machine specific options. */ | |
38 | const char * md_shortopts = ""; /* None yet. */ | |
39 | ||
40 | enum options | |
41 | { | |
42 | OPTION_MACH_Z80 = OPTION_MD_BASE, | |
43 | OPTION_MACH_R800, | |
44 | OPTION_MACH_IUD, | |
45 | OPTION_MACH_WUD, | |
46 | OPTION_MACH_FUD, | |
47 | OPTION_MACH_IUP, | |
48 | OPTION_MACH_WUP, | |
49 | OPTION_MACH_FUP | |
50 | }; | |
51 | ||
52 | #define INS_Z80 1 | |
53 | #define INS_UNDOC 2 | |
54 | #define INS_UNPORT 4 | |
55 | #define INS_R800 8 | |
56 | ||
57 | struct option md_longopts[] = | |
58 | { | |
59 | { "z80", no_argument, NULL, OPTION_MACH_Z80}, | |
60 | { "r800", no_argument, NULL, OPTION_MACH_R800}, | |
61 | { "ignore-undocumented-instructions", no_argument, NULL, OPTION_MACH_IUD }, | |
62 | { "Wnud", no_argument, NULL, OPTION_MACH_IUD }, | |
63 | { "warn-undocumented-instructions", no_argument, NULL, OPTION_MACH_WUD }, | |
64 | { "Wud", no_argument, NULL, OPTION_MACH_WUD }, | |
65 | { "forbid-undocumented-instructions", no_argument, NULL, OPTION_MACH_FUD }, | |
66 | { "Fud", no_argument, NULL, OPTION_MACH_FUD }, | |
67 | { "ignore-unportable-instructions", no_argument, NULL, OPTION_MACH_IUP }, | |
68 | { "Wnup", no_argument, NULL, OPTION_MACH_IUP }, | |
69 | { "warn-unportable-instructions", no_argument, NULL, OPTION_MACH_WUP }, | |
70 | { "Wup", no_argument, NULL, OPTION_MACH_WUP }, | |
71 | { "forbid-unportable-instructions", no_argument, NULL, OPTION_MACH_FUP }, | |
72 | { "Fup", no_argument, NULL, OPTION_MACH_FUP }, | |
73 | ||
74 | { NULL, no_argument, NULL, 0 } | |
75 | } ; | |
76 | ||
77 | size_t md_longopts_size = sizeof (md_longopts); | |
78 | ||
79 | extern int coff_flags; | |
80 | /* Instruction classes that silently assembled. */ | |
81 | static int ins_ok = INS_Z80 | INS_UNDOC; | |
82 | /* Instruction classes that generate errors. */ | |
83 | static int ins_err = INS_R800; | |
84 | /* Instruction classes actually used, determines machine type. */ | |
85 | static int ins_used = INS_Z80; | |
86 | ||
87 | int | |
88 | md_parse_option (int c, char* arg ATTRIBUTE_UNUSED) | |
89 | { | |
90 | switch (c) | |
91 | { | |
92 | default: | |
93 | return 0; | |
94 | case OPTION_MACH_Z80: | |
95 | ins_ok &= ~INS_R800; | |
96 | ins_err |= INS_R800; | |
97 | break; | |
98 | case OPTION_MACH_R800: | |
99 | ins_ok = INS_Z80 | INS_UNDOC | INS_R800; | |
100 | ins_err = INS_UNPORT; | |
101 | break; | |
102 | case OPTION_MACH_IUD: | |
103 | ins_ok |= INS_UNDOC; | |
104 | ins_err &= ~INS_UNDOC; | |
105 | break; | |
106 | case OPTION_MACH_IUP: | |
107 | ins_ok |= INS_UNDOC | INS_UNPORT; | |
108 | ins_err &= ~(INS_UNDOC | INS_UNPORT); | |
109 | break; | |
110 | case OPTION_MACH_WUD: | |
111 | if ((ins_ok & INS_R800) == 0) | |
112 | { | |
113 | ins_ok &= ~(INS_UNDOC|INS_UNPORT); | |
114 | ins_err &= ~INS_UNDOC; | |
115 | } | |
116 | break; | |
117 | case OPTION_MACH_WUP: | |
118 | ins_ok &= ~INS_UNPORT; | |
119 | ins_err &= ~(INS_UNDOC|INS_UNPORT); | |
120 | break; | |
121 | case OPTION_MACH_FUD: | |
122 | if ((ins_ok & INS_R800) == 0) | |
123 | { | |
124 | ins_ok &= (INS_UNDOC | INS_UNPORT); | |
125 | ins_err |= INS_UNDOC | INS_UNPORT; | |
126 | } | |
127 | break; | |
128 | case OPTION_MACH_FUP: | |
129 | ins_ok &= ~INS_UNPORT; | |
130 | ins_err |= INS_UNPORT; | |
131 | break; | |
132 | } | |
133 | ||
134 | return 1; | |
135 | } | |
136 | ||
137 | void | |
138 | md_show_usage (FILE * f) | |
139 | { | |
140 | fprintf (f, "\n\ | |
141 | CPU model/instruction set options:\n\ | |
142 | \n\ | |
143 | -z80\t\t assemble for Z80\n\ | |
144 | -ignore-undocumented-instructions\n\ | |
145 | -Wnud\n\ | |
146 | \tsilently assemble undocumented Z80-instructions that work on R800\n\ | |
147 | -ignore-unportable-instructions\n\ | |
148 | -Wnup\n\ | |
149 | \tsilently assemble all undocumented Z80-instructions\n\ | |
150 | -warn-undocumented-instructions\n\ | |
151 | -Wud\n\ | |
152 | \tissue warnings for undocumented Z80-instructions that work on R800\n\ | |
153 | -warn-unportable-instructions\n\ | |
154 | -Wup\n\ | |
155 | \tissue warnings for other undocumented Z80-instructions\n\ | |
156 | -forbid-undocumented-instructions\n\ | |
157 | -Fud\n\ | |
158 | \ttreat all undocumented z80-instructions as errors\n\ | |
159 | -forbid-unportable-instructions\n\ | |
160 | -Fup\n\ | |
161 | \ttreat undocumented z80-instructions that do not work on R800 as errors\n\ | |
162 | -r800\t assemble for R800\n\n\ | |
163 | Default: -z80 -ignore-undocument-instructions -warn-unportable-instructions.\n"); | |
164 | } | |
165 | ||
166 | static symbolS * zero; | |
167 | ||
168 | void | |
169 | md_begin (void) | |
170 | { | |
171 | expressionS nul; | |
172 | char * p; | |
173 | ||
174 | p = input_line_pointer; | |
175 | input_line_pointer = "0"; | |
176 | nul.X_md=0; | |
177 | expression (& nul); | |
178 | input_line_pointer = p; | |
179 | zero = make_expr_symbol (& nul); | |
180 | /* We do not use relaxation (yet). */ | |
181 | linkrelax = 0; | |
182 | } | |
183 | ||
184 | void | |
185 | z80_md_end (void) | |
186 | { | |
187 | int mach_type; | |
188 | ||
189 | if (ins_used & (INS_UNPORT | INS_R800)) | |
190 | ins_used |= INS_UNDOC; | |
191 | ||
192 | switch (ins_used) | |
193 | { | |
194 | case INS_Z80: | |
195 | mach_type = bfd_mach_z80strict; | |
196 | break; | |
197 | case INS_Z80|INS_UNDOC: | |
198 | mach_type = bfd_mach_z80; | |
199 | break; | |
200 | case INS_Z80|INS_UNDOC|INS_UNPORT: | |
201 | mach_type = bfd_mach_z80full; | |
202 | break; | |
203 | case INS_Z80|INS_UNDOC|INS_R800: | |
204 | mach_type = bfd_mach_r800; | |
205 | break; | |
206 | default: | |
207 | mach_type = 0; | |
208 | } | |
209 | ||
210 | bfd_set_arch_mach (stdoutput, TARGET_ARCH, mach_type); | |
211 | } | |
212 | ||
213 | /* Port specific features. */ | |
214 | const pseudo_typeS md_pseudo_table[] = | |
215 | { | |
216 | { "defs", s_space, 1}, /* Synonym for ds on some assemblers. */ | |
217 | { "ds", s_space, 1}, /* Fill with bytes rather than words. */ | |
218 | { "psect", obj_coff_section, 0}, /* TODO: Translate attributes. */ | |
219 | { "set", 0, 0}, /* Real instruction on z80. */ | |
220 | { NULL, 0, 0 } | |
221 | } ; | |
222 | ||
223 | static const char * | |
224 | skip_space (const char *s) | |
225 | { | |
226 | while (*s == ' ' || *s == '\t') | |
227 | ++s; | |
228 | return s; | |
229 | } | |
230 | ||
231 | /* A non-zero return-value causes a continue in the | |
232 | function read_a_source_file () in ../read.c. */ | |
233 | int | |
234 | z80_start_line_hook (void) | |
235 | { | |
236 | char *p, quote; | |
237 | char buf[4]; | |
238 | ||
239 | /* Convert one character constants. */ | |
240 | for (p = input_line_pointer; *p && *p != '\n'; ++p) | |
241 | { | |
242 | switch (*p) | |
243 | { | |
244 | case '\'': | |
245 | if (p[1] != 0 && p[1] != '\'' && p[2] == '\'') | |
246 | { | |
247 | snprintf (buf, 4, "%3d", (unsigned char)p[1]); | |
248 | *p++ = buf[0]; | |
249 | *p++ = buf[1]; | |
250 | *p++ = buf[2]; | |
251 | break; | |
252 | } | |
253 | case '"': | |
254 | for (quote = *p++; quote != *p && '\n' != *p; ++p) | |
255 | /* No escapes. */ ; | |
256 | if (quote != *p) | |
257 | { | |
258 | as_bad (_("-- unterminated string")); | |
259 | ignore_rest_of_line (); | |
260 | return 1; | |
261 | } | |
262 | break; | |
263 | } | |
264 | } | |
265 | /* Check for <label>[:] (EQU|DEFL) <value>. */ | |
266 | if (is_name_beginner (*input_line_pointer)) | |
267 | { | |
268 | char c, *rest, *line_start; | |
269 | int len; | |
f9eb6721 | 270 | symbolS * symbolP; |
3c9b82ba NC |
271 | |
272 | line_start = input_line_pointer; | |
273 | LISTING_NEWLINE (); | |
274 | if (ignore_input ()) | |
275 | return 0; | |
276 | ||
277 | c = get_symbol_end (); | |
278 | rest = input_line_pointer + 1; | |
279 | ||
280 | if (*rest == ':') | |
281 | ++rest; | |
282 | if (*rest == ' ' || *rest == '\t') | |
283 | ++rest; | |
284 | if (strncasecmp (rest, "EQU", 3) == 0) | |
285 | len = 3; | |
286 | else if (strncasecmp (rest, "DEFL", 4) == 0) | |
287 | len = 4; | |
288 | else | |
289 | len = 0; | |
290 | if (len && (rest[len] == ' ' || rest[len] == '\t')) | |
291 | { | |
292 | /* Handle assignment here. */ | |
293 | input_line_pointer = rest + len; | |
294 | if (line_start[-1] == '\n') | |
295 | bump_line_counters (); | |
296 | /* Most Z80 assemblers require the first definition of a | |
f9eb6721 AM |
297 | label to use "EQU" and redefinitions to have "DEFL". */ |
298 | if (len == 3 && (symbolP = symbol_find (line_start)) != NULL) | |
299 | { | |
300 | if (S_IS_DEFINED (symbolP) || symbol_equated_p (symbolP)) | |
301 | as_bad (_("symbol `%s' is already defined"), line_start); | |
302 | } | |
303 | /* All symbols may be redefined. */ | |
304 | equals (line_start, 1); | |
3c9b82ba NC |
305 | return 1; |
306 | } | |
307 | else | |
308 | { | |
309 | /* Restore line and pointer. */ | |
310 | *input_line_pointer = c; | |
311 | input_line_pointer = line_start; | |
312 | } | |
313 | } | |
314 | return 0; | |
315 | } | |
316 | ||
317 | symbolS * | |
318 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) | |
319 | { | |
320 | return NULL; | |
321 | } | |
322 | ||
323 | char * | |
324 | md_atof (int type ATTRIBUTE_UNUSED, char *litP ATTRIBUTE_UNUSED, | |
325 | int *sizeP ATTRIBUTE_UNUSED) | |
326 | { | |
327 | return _("floating point numbers are not implemented"); | |
328 | } | |
329 | ||
330 | valueT | |
331 | md_section_align (segT seg ATTRIBUTE_UNUSED, valueT size) | |
332 | { | |
333 | return size; | |
334 | } | |
335 | ||
336 | long | |
337 | md_pcrel_from (fixS * fixp) | |
338 | { | |
339 | return fixp->fx_where + | |
340 | fixp->fx_frag->fr_address + 1; | |
341 | } | |
342 | ||
343 | typedef const char * (asfunc)(char, char, const char*); | |
344 | ||
345 | typedef struct _table_t | |
346 | { | |
347 | char* name; | |
348 | char prefix; | |
349 | char opcode; | |
350 | asfunc * fp; | |
351 | } table_t; | |
352 | ||
353 | /* Compares the key for structs that start with a char * to the key. */ | |
354 | static int | |
355 | key_cmp (const void * a, const void * b) | |
356 | { | |
357 | const char *str_a, *str_b; | |
358 | ||
359 | str_a = *((const char**)a); | |
360 | str_b = *((const char**)b); | |
361 | return strcmp (str_a, str_b); | |
362 | } | |
363 | ||
364 | #define BUFLEN 8 /* Large enough for any keyword. */ | |
365 | ||
366 | char buf[BUFLEN]; | |
367 | const char *key = buf; | |
368 | ||
369 | #define R_STACKABLE (0x80) | |
370 | #define R_ARITH (0x40) | |
371 | #define R_IX (0x20) | |
372 | #define R_IY (0x10) | |
373 | #define R_INDEX (R_IX | R_IY) | |
374 | ||
375 | #define REG_A (7) | |
376 | #define REG_B (0) | |
377 | #define REG_C (1) | |
378 | #define REG_D (2) | |
379 | #define REG_E (3) | |
380 | #define REG_H (4) | |
381 | #define REG_L (5) | |
382 | #define REG_F (6 | 8) | |
383 | #define REG_I (9) | |
384 | #define REG_R (10) | |
385 | ||
386 | #define REG_AF (3 | R_STACKABLE) | |
387 | #define REG_BC (0 | R_STACKABLE | R_ARITH) | |
388 | #define REG_DE (1 | R_STACKABLE | R_ARITH) | |
389 | #define REG_HL (2 | R_STACKABLE | R_ARITH) | |
390 | #define REG_SP (3 | R_ARITH) | |
391 | ||
392 | static const struct reg_entry | |
393 | { | |
394 | char* name; | |
395 | int number; | |
396 | } regtable[] = | |
397 | { | |
398 | {"a", REG_A }, | |
399 | {"af", REG_AF }, | |
400 | {"b", REG_B }, | |
401 | {"bc", REG_BC }, | |
402 | {"c", REG_C }, | |
403 | {"d", REG_D }, | |
404 | {"de", REG_DE }, | |
405 | {"e", REG_E }, | |
406 | {"f", REG_F }, | |
407 | {"h", REG_H }, | |
408 | {"hl", REG_HL }, | |
409 | {"i", REG_I }, | |
410 | {"ix", REG_HL | R_IX }, | |
411 | {"ixh",REG_H | R_IX }, | |
412 | {"ixl",REG_L | R_IX }, | |
413 | {"iy", REG_HL | R_IY }, | |
414 | {"iyh",REG_H | R_IY }, | |
415 | {"iyl",REG_L | R_IY }, | |
416 | {"l", REG_L }, | |
417 | {"r", REG_R }, | |
418 | {"sp", REG_SP }, | |
419 | } ; | |
420 | ||
421 | /* Prevent an error on a line from also generating | |
422 | a "junk at end of line" error message. */ | |
423 | static char err_flag; | |
424 | ||
425 | static void | |
426 | error (const char * message) | |
427 | { | |
428 | as_bad (message); | |
429 | err_flag = 1; | |
430 | } | |
431 | ||
432 | static void | |
433 | ill_op (void) | |
434 | { | |
435 | error (_("illegal operand")); | |
436 | } | |
437 | ||
438 | static void | |
439 | wrong_mach (int ins_type) | |
440 | { | |
441 | const char *p; | |
442 | ||
443 | switch (ins_type) | |
444 | { | |
445 | case INS_UNDOC: | |
446 | p = "undocumented instruction"; | |
447 | break; | |
448 | case INS_UNPORT: | |
449 | p = "instruction does not work on R800"; | |
450 | break; | |
451 | case INS_R800: | |
452 | p = "instruction only works R800"; | |
453 | break; | |
454 | default: | |
455 | p = 0; /* Not reachables. */ | |
456 | } | |
457 | ||
458 | if (ins_type & ins_err) | |
459 | error (_(p)); | |
460 | else | |
461 | as_warn (_(p)); | |
462 | } | |
463 | ||
464 | static void | |
465 | check_mach (int ins_type) | |
466 | { | |
467 | if ((ins_type & ins_ok) == 0) | |
468 | wrong_mach (ins_type); | |
469 | ins_used |= ins_type; | |
470 | } | |
471 | ||
472 | /* This function tries to subtract two symbols, the generic code does | |
473 | that too, but this function tries harder. | |
474 | The behaviour of this function is not altered by extra | |
475 | fragmentations caused by the code to produce listings. */ | |
476 | int | |
477 | z80_optimize_expr (expressionS *resultP, operatorT left_op, | |
478 | expressionS *right) | |
479 | { | |
480 | int res, swap, som; | |
481 | fragS *lfrag, *rfrag, *cur; | |
482 | ||
483 | res = 0; | |
484 | if (left_op == O_subtract | |
485 | && right->X_op == O_symbol | |
486 | && resultP->X_op == O_symbol) | |
487 | { | |
488 | lfrag = symbol_get_frag (resultP->X_add_symbol); | |
489 | rfrag = symbol_get_frag (right->X_add_symbol); | |
490 | ||
491 | if (S_GET_SEGMENT (right->X_add_symbol) != undefined_section | |
492 | && (S_GET_SEGMENT (right->X_add_symbol) | |
493 | == S_GET_SEGMENT (resultP->X_add_symbol))) | |
494 | { | |
495 | for (swap = 0; (res == 0) && (swap < 2); ++swap) | |
496 | { | |
497 | if (swap) | |
498 | { | |
499 | cur = lfrag; | |
500 | lfrag = rfrag; | |
501 | rfrag = cur; | |
502 | } | |
503 | else | |
504 | cur = rfrag; | |
505 | ||
506 | /* Now som == cur->fr_address - rfrag->address, except | |
507 | the latter may not have been computed yet. */ | |
508 | for (som = 0; cur && cur != lfrag; cur = cur->fr_next) | |
509 | { | |
510 | if (cur->fr_type == rs_fill) /* Is the size fized? */ | |
511 | som += cur->fr_fix+cur->fr_offset*cur->fr_var; | |
512 | else | |
513 | break; | |
514 | } | |
515 | ||
516 | if (cur == lfrag) | |
517 | { | |
518 | resultP->X_add_number -= right->X_add_number; | |
519 | resultP->X_add_number | |
520 | += (S_GET_VALUE (resultP->X_add_symbol) | |
521 | - S_GET_VALUE (right->X_add_symbol)); | |
522 | som -= lfrag->fr_address - rfrag->fr_address; | |
523 | /* Correct the result if the fr_address | |
524 | fields are not computed yet. */ | |
525 | resultP->X_add_number += (swap ? -som : som); | |
526 | resultP->X_op = O_constant; | |
527 | resultP->X_add_symbol = 0; | |
528 | res = 1; | |
529 | } | |
530 | } | |
531 | } | |
532 | } | |
533 | return res; | |
534 | } | |
535 | ||
536 | /* Check whether an expression is indirect. */ | |
537 | static int | |
538 | is_indir (const char *s) | |
539 | { | |
540 | char quote; | |
541 | const char *p; | |
542 | int indir, depth; | |
543 | ||
544 | /* Indirection is indicated with parentheses. */ | |
545 | indir = (*s == '('); | |
546 | ||
547 | for (p = s, depth = 0; *p && *p != ','; ++p) | |
548 | { | |
549 | switch (*p) | |
550 | { | |
551 | case '"': | |
552 | case '\'': | |
553 | for (quote = *p++; quote != *p && *p != '\n'; ++p) | |
554 | if (*p == '\\' && p[1]) | |
555 | ++p; | |
556 | break; | |
557 | case '(': | |
558 | ++ depth; | |
559 | break; | |
560 | case ')': | |
561 | -- depth; | |
562 | if (depth == 0) | |
563 | { | |
564 | p = skip_space (p + 1); | |
565 | if (*p && *p != ',') | |
566 | indir = 0; | |
567 | --p; | |
568 | } | |
569 | if (depth < 0) | |
570 | error (_("mismatched parentheses")); | |
571 | break; | |
572 | } | |
573 | } | |
574 | ||
575 | if (depth != 0) | |
576 | error (_("mismatched parentheses")); | |
577 | ||
578 | return indir; | |
579 | } | |
580 | ||
581 | /* Parse general expression. */ | |
582 | static const char * | |
583 | parse_exp2 (const char *s, expressionS *op, segT *pseg) | |
584 | { | |
585 | const char *p; | |
586 | int indir; | |
587 | int i; | |
588 | const struct reg_entry * regp; | |
589 | expressionS offset; | |
590 | ||
591 | p = skip_space (s); | |
592 | op->X_md = indir = is_indir (p); | |
593 | if (indir) | |
594 | p = skip_space (p + 1); | |
595 | ||
596 | for (i = 0; i < BUFLEN; ++i) | |
597 | { | |
598 | if (!ISALPHA (p[i])) /* Register names consist of letters only. */ | |
599 | break; | |
600 | buf[i] = TOLOWER (p[i]); | |
601 | } | |
602 | ||
603 | if ((i < BUFLEN) && ((p[i] == 0) || (strchr (")+-, \t", p[i])))) | |
604 | { | |
605 | buf[i] = 0; | |
606 | regp = bsearch (& key, regtable, ARRAY_SIZE (regtable), | |
607 | sizeof (regtable[0]), key_cmp); | |
608 | if (regp) | |
609 | { | |
610 | *pseg = reg_section; | |
611 | op->X_add_symbol = op->X_op_symbol = 0; | |
612 | op->X_add_number = regp->number; | |
613 | op->X_op = O_register; | |
614 | p += strlen (regp->name); | |
615 | p = skip_space (p); | |
616 | if (indir) | |
617 | { | |
618 | if (*p == ')') | |
619 | ++p; | |
620 | if ((regp->number & R_INDEX) && (regp->number & R_ARITH)) | |
621 | { | |
622 | op->X_op = O_md1; | |
623 | ||
624 | if ((*p == '+') || (*p == '-')) | |
625 | { | |
626 | input_line_pointer = (char*) p; | |
627 | expression (& offset); | |
628 | p = skip_space (input_line_pointer); | |
629 | if (*p != ')') | |
630 | error (_("bad offset expression syntax")); | |
631 | else | |
632 | ++ p; | |
633 | op->X_add_symbol = make_expr_symbol (& offset); | |
634 | return p; | |
635 | } | |
636 | ||
637 | /* We treat (i[xy]) as (i[xy]+0), which is how it will | |
638 | end up anyway, unless we're processing jp (i[xy]). */ | |
639 | op->X_add_symbol = zero; | |
640 | } | |
641 | } | |
642 | p = skip_space (p); | |
643 | ||
644 | if ((*p == 0) || (*p == ',')) | |
645 | return p; | |
646 | } | |
647 | } | |
648 | /* Not an argument involving a register; use the generic parser. */ | |
649 | input_line_pointer = (char*) s ; | |
650 | *pseg = expression (op); | |
651 | if (op->X_op == O_absent) | |
652 | error (_("missing operand")); | |
653 | if (op->X_op == O_illegal) | |
654 | error (_("bad expression syntax")); | |
655 | return input_line_pointer; | |
656 | } | |
657 | ||
658 | static const char * | |
659 | parse_exp (const char *s, expressionS *op) | |
660 | { | |
661 | segT dummy; | |
662 | return parse_exp2 (s, op, & dummy); | |
663 | } | |
664 | ||
665 | /* Condition codes, including some synonyms provided by HiTech zas. */ | |
666 | static const struct reg_entry cc_tab[] = | |
667 | { | |
668 | { "age", 6 << 3 }, | |
669 | { "alt", 7 << 3 }, | |
670 | { "c", 3 << 3 }, | |
671 | { "di", 4 << 3 }, | |
672 | { "ei", 5 << 3 }, | |
673 | { "lge", 2 << 3 }, | |
674 | { "llt", 3 << 3 }, | |
675 | { "m", 7 << 3 }, | |
676 | { "nc", 2 << 3 }, | |
677 | { "nz", 0 << 3 }, | |
678 | { "p", 6 << 3 }, | |
679 | { "pe", 5 << 3 }, | |
680 | { "po", 4 << 3 }, | |
681 | { "z", 1 << 3 }, | |
682 | } ; | |
683 | ||
684 | /* Parse condition code. */ | |
685 | static const char * | |
686 | parse_cc (const char *s, char * op) | |
687 | { | |
688 | const char *p; | |
689 | int i; | |
690 | struct reg_entry * cc_p; | |
691 | ||
692 | for (i = 0; i < BUFLEN; ++i) | |
693 | { | |
694 | if (!ISALPHA (s[i])) /* Condition codes consist of letters only. */ | |
695 | break; | |
696 | buf[i] = TOLOWER (s[i]); | |
697 | } | |
698 | ||
699 | if ((i < BUFLEN) | |
700 | && ((s[i] == 0) || (s[i] == ','))) | |
701 | { | |
702 | buf[i] = 0; | |
703 | cc_p = bsearch (&key, cc_tab, ARRAY_SIZE (cc_tab), | |
704 | sizeof (cc_tab[0]), key_cmp); | |
705 | } | |
706 | else | |
707 | cc_p = NULL; | |
708 | ||
709 | if (cc_p) | |
710 | { | |
711 | *op = cc_p->number; | |
712 | p = s + i; | |
713 | } | |
714 | else | |
715 | p = NULL; | |
716 | ||
717 | return p; | |
718 | } | |
719 | ||
720 | static const char * | |
721 | emit_insn (char prefix, char opcode, const char * args) | |
722 | { | |
723 | char *p; | |
724 | ||
725 | if (prefix) | |
726 | { | |
727 | p = frag_more (2); | |
728 | *p++ = prefix; | |
729 | } | |
730 | else | |
731 | p = frag_more (1); | |
732 | *p = opcode; | |
733 | return args; | |
734 | } | |
735 | ||
736 | static void | |
737 | emit_byte (expressionS * val, bfd_reloc_code_real_type r_type) | |
738 | { | |
739 | char *p; | |
740 | int lo, hi; | |
741 | fixS * fixp; | |
742 | ||
743 | p = frag_more (1); | |
744 | *p = val->X_add_number; | |
745 | if ((r_type != BFD_RELOC_8_PCREL) && (val->X_op == O_constant)) | |
746 | { | |
747 | lo = -128; | |
748 | hi = (BFD_RELOC_8 == r_type) ? 255 : 127; | |
749 | ||
750 | if ((val->X_add_number < lo) || (val->X_add_number > hi)) | |
751 | { | |
752 | if (r_type == BFD_RELOC_Z80_DISP8) | |
753 | as_bad (_("offset too large")); | |
754 | else | |
755 | as_warn (_("overflow")); | |
756 | } | |
757 | } | |
758 | else | |
759 | { | |
760 | fixp = fix_new_exp (frag_now, p - frag_now->fr_literal, 1, val, | |
761 | (r_type == BFD_RELOC_8_PCREL) ? TRUE : FALSE, r_type); | |
762 | /* FIXME : Process constant offsets immediately. */ | |
763 | } | |
764 | } | |
765 | ||
766 | static void | |
767 | emit_word (expressionS * val) | |
768 | { | |
769 | char *p; | |
770 | ||
771 | p = frag_more (2); | |
772 | if ( (val->X_op == O_register) | |
773 | || (val->X_op == O_md1)) | |
774 | ill_op (); | |
775 | else | |
776 | { | |
777 | *p = val->X_add_number; | |
778 | p[1] = (val->X_add_number>>8); | |
779 | if (val->X_op != O_constant) | |
780 | fix_new_exp (frag_now, p - frag_now->fr_literal, 2, | |
781 | val, FALSE, BFD_RELOC_16); | |
782 | } | |
783 | } | |
784 | ||
785 | static void | |
786 | emit_mx (char prefix, char opcode, int shift, expressionS * arg) | |
787 | /* The operand m may be r, (hl), (ix+d), (iy+d), | |
788 | if 0 == prefix m may also be ixl, ixh, iyl, iyh. */ | |
789 | { | |
790 | char *q; | |
791 | int rnum; | |
792 | ||
793 | rnum = arg->X_add_number; | |
794 | switch (arg->X_op) | |
795 | { | |
796 | case O_register: | |
797 | if (arg->X_md) | |
798 | { | |
799 | if (rnum != REG_HL) | |
800 | { | |
801 | ill_op (); | |
802 | break; | |
803 | } | |
804 | else | |
805 | rnum = 6; | |
806 | } | |
807 | else | |
808 | { | |
809 | if ((prefix == 0) && (rnum & R_INDEX)) | |
810 | { | |
811 | prefix = (rnum & R_IX) ? 0xDD : 0xFD; | |
812 | check_mach (INS_UNDOC); | |
813 | rnum &= ~R_INDEX; | |
814 | } | |
815 | if (rnum > 7) | |
816 | { | |
817 | ill_op (); | |
818 | break; | |
819 | } | |
820 | } | |
821 | q = frag_more (prefix ? 2 : 1); | |
822 | if (prefix) | |
823 | * q ++ = prefix; | |
824 | * q ++ = opcode + (rnum << shift); | |
825 | break; | |
826 | case O_md1: | |
827 | q = frag_more (2); | |
828 | *q++ = (rnum & R_IX) ? 0xDD : 0xFD; | |
829 | *q = (prefix) ? prefix : (opcode + (6 << shift)); | |
830 | emit_byte (symbol_get_value_expression (arg->X_add_symbol), | |
831 | BFD_RELOC_Z80_DISP8); | |
832 | if (prefix) | |
833 | { | |
834 | q = frag_more (1); | |
835 | *q = opcode+(6<<shift); | |
836 | } | |
837 | break; | |
838 | default: | |
839 | abort (); | |
840 | } | |
841 | } | |
842 | ||
843 | /* The operand m may be r, (hl), (ix+d), (iy+d), | |
844 | if 0 = prefix m may also be ixl, ixh, iyl, iyh. */ | |
845 | static const char * | |
846 | emit_m (char prefix, char opcode, const char *args) | |
847 | { | |
848 | expressionS arg_m; | |
849 | const char *p; | |
850 | ||
851 | p = parse_exp (args, &arg_m); | |
852 | switch (arg_m.X_op) | |
853 | { | |
854 | case O_md1: | |
855 | case O_register: | |
856 | emit_mx (prefix, opcode, 0, &arg_m); | |
857 | break; | |
858 | default: | |
859 | ill_op (); | |
860 | } | |
861 | return p; | |
862 | } | |
863 | ||
864 | /* The operand m may be as above or one of the undocumented | |
865 | combinations (ix+d),r and (iy+d),r (if unportable instructions | |
866 | are allowed). */ | |
867 | static const char * | |
868 | emit_mr (char prefix, char opcode, const char *args) | |
869 | { | |
870 | expressionS arg_m, arg_r; | |
871 | const char *p; | |
872 | ||
873 | p = parse_exp (args, & arg_m); | |
874 | ||
875 | switch (arg_m.X_op) | |
876 | { | |
877 | case O_md1: | |
878 | if (*p == ',') | |
879 | { | |
880 | p = parse_exp (p + 1, & arg_r); | |
881 | ||
882 | if ((arg_r.X_md == 0) | |
883 | && (arg_r.X_op == O_register) | |
884 | && (arg_r.X_add_number < 8)) | |
885 | opcode += arg_r.X_add_number-6; /* Emit_mx () will add 6. */ | |
886 | else | |
887 | { | |
888 | ill_op (); | |
889 | break; | |
890 | } | |
891 | check_mach (INS_UNPORT); | |
892 | } | |
893 | case O_register: | |
894 | emit_mx (prefix, opcode, 0, & arg_m); | |
895 | break; | |
896 | default: | |
897 | ill_op (); | |
898 | } | |
899 | return p; | |
900 | } | |
901 | ||
902 | static void | |
903 | emit_sx (char prefix, char opcode, expressionS * arg_p) | |
904 | { | |
905 | char *q; | |
906 | ||
907 | switch (arg_p->X_op) | |
908 | { | |
909 | case O_register: | |
910 | case O_md1: | |
911 | emit_mx (prefix, opcode, 0, arg_p); | |
912 | break; | |
913 | default: | |
914 | if (arg_p->X_md) | |
915 | ill_op (); | |
916 | else | |
917 | { | |
918 | q = frag_more (prefix ? 2 : 1); | |
919 | if (prefix) | |
920 | *q++ = prefix; | |
921 | *q = opcode ^ 0x46; | |
922 | emit_byte (arg_p, BFD_RELOC_8); | |
923 | } | |
924 | } | |
925 | } | |
926 | ||
927 | /* The operand s may be r, (hl), (ix+d), (iy+d), n. */ | |
928 | static const char * | |
929 | emit_s (char prefix, char opcode, const char *args) | |
930 | { | |
931 | expressionS arg_s; | |
932 | const char *p; | |
933 | ||
934 | p = parse_exp (args, & arg_s); | |
935 | emit_sx (prefix, opcode, & arg_s); | |
936 | return p; | |
937 | } | |
938 | ||
939 | static const char * | |
940 | emit_call (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) | |
941 | { | |
942 | expressionS addr; | |
943 | const char *p; char *q; | |
944 | ||
945 | p = parse_exp (args, &addr); | |
946 | if (addr.X_md) | |
947 | ill_op (); | |
948 | else | |
949 | { | |
950 | q = frag_more (1); | |
951 | *q = opcode; | |
952 | emit_word (& addr); | |
953 | } | |
954 | return p; | |
955 | } | |
956 | ||
957 | /* Operand may be rr, r, (hl), (ix+d), (iy+d). */ | |
958 | static const char * | |
959 | emit_incdec (char prefix, char opcode, const char * args) | |
960 | { | |
961 | expressionS operand; | |
962 | int rnum; | |
963 | const char *p; char *q; | |
964 | ||
965 | p = parse_exp (args, &operand); | |
966 | rnum = operand.X_add_number; | |
967 | if ((! operand.X_md) | |
968 | && (operand.X_op == O_register) | |
969 | && (R_ARITH&rnum)) | |
970 | { | |
971 | q = frag_more ((rnum & R_INDEX) ? 2 : 1); | |
972 | if (rnum & R_INDEX) | |
973 | *q++ = (rnum & R_IX) ? 0xDD : 0xFD; | |
974 | *q = prefix + ((rnum & 3) << 4); | |
975 | } | |
976 | else | |
977 | { | |
978 | if ((operand.X_op == O_md1) || (operand.X_op == O_register)) | |
979 | emit_mx (0, opcode, 3, & operand); | |
980 | else | |
981 | ill_op (); | |
982 | } | |
983 | return p; | |
984 | } | |
985 | ||
986 | static const char * | |
987 | emit_jr (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) | |
988 | { | |
989 | expressionS addr; | |
990 | const char *p; | |
991 | char *q; | |
992 | ||
993 | p = parse_exp (args, &addr); | |
994 | if (addr.X_md) | |
995 | ill_op (); | |
996 | else | |
997 | { | |
998 | q = frag_more (1); | |
999 | *q = opcode; | |
1000 | emit_byte (&addr, BFD_RELOC_8_PCREL); | |
1001 | } | |
1002 | return p; | |
1003 | } | |
1004 | ||
1005 | static const char * | |
1006 | emit_jp (char prefix, char opcode, const char * args) | |
1007 | { | |
1008 | expressionS addr; | |
1009 | const char *p; | |
1010 | char *q; | |
1011 | int rnum; | |
1012 | ||
1013 | p = parse_exp (args, & addr); | |
1014 | if (addr.X_md) | |
1015 | { | |
1016 | rnum = addr.X_add_number; | |
1017 | if ((addr.X_op == O_register && (rnum & ~R_INDEX) == REG_HL) | |
1018 | /* An operand (i[xy]) would have been rewritten to (i[xy]+0) | |
1019 | in parse_exp (). */ | |
1020 | || (addr.X_op == O_md1 && addr.X_add_symbol == zero)) | |
1021 | { | |
1022 | q = frag_more ((rnum & R_INDEX) ? 2 : 1); | |
1023 | if (rnum & R_INDEX) | |
1024 | *q++ = (rnum & R_IX) ? 0xDD : 0xFD; | |
1025 | *q = prefix; | |
1026 | } | |
1027 | else | |
1028 | ill_op (); | |
1029 | } | |
1030 | else | |
1031 | { | |
1032 | q = frag_more (1); | |
1033 | *q = opcode; | |
1034 | emit_word (& addr); | |
1035 | } | |
1036 | return p; | |
1037 | } | |
1038 | ||
1039 | static const char * | |
1040 | emit_im (char prefix, char opcode, const char * args) | |
1041 | { | |
1042 | expressionS mode; | |
1043 | const char *p; | |
1044 | char *q; | |
1045 | ||
1046 | p = parse_exp (args, & mode); | |
1047 | if (mode.X_md || (mode.X_op != O_constant)) | |
1048 | ill_op (); | |
1049 | else | |
1050 | switch (mode.X_add_number) | |
1051 | { | |
1052 | case 1: | |
1053 | case 2: | |
1054 | ++mode.X_add_number; | |
1055 | /* Fall through. */ | |
1056 | case 0: | |
1057 | q = frag_more (2); | |
1058 | *q++ = prefix; | |
1059 | *q = opcode + 8*mode.X_add_number; | |
1060 | break; | |
1061 | default: | |
1062 | ill_op (); | |
1063 | } | |
1064 | return p; | |
1065 | } | |
1066 | ||
1067 | static const char * | |
1068 | emit_pop (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) | |
1069 | { | |
1070 | expressionS regp; | |
1071 | const char *p; | |
1072 | char *q; | |
1073 | ||
1074 | p = parse_exp (args, & regp); | |
1075 | if ((!regp.X_md) | |
1076 | && (regp.X_op == O_register) | |
1077 | && (regp.X_add_number & R_STACKABLE)) | |
1078 | { | |
1079 | int rnum; | |
1080 | ||
1081 | rnum = regp.X_add_number; | |
1082 | if (rnum&R_INDEX) | |
1083 | { | |
1084 | q = frag_more (2); | |
1085 | *q++ = (rnum&R_IX)?0xDD:0xFD; | |
1086 | } | |
1087 | else | |
1088 | q = frag_more (1); | |
1089 | *q = opcode + ((rnum & 3) << 4); | |
1090 | } | |
1091 | else | |
1092 | ill_op (); | |
1093 | ||
1094 | return p; | |
1095 | } | |
1096 | ||
1097 | static const char * | |
1098 | emit_retcc (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) | |
1099 | { | |
1100 | char cc, *q; | |
1101 | const char *p; | |
1102 | ||
1103 | p = parse_cc (args, &cc); | |
1104 | q = frag_more (1); | |
1105 | if (p) | |
1106 | *q = opcode + cc; | |
1107 | else | |
1108 | *q = prefix; | |
1109 | return p ? p : args; | |
1110 | } | |
1111 | ||
1112 | static const char * | |
1113 | emit_adc (char prefix, char opcode, const char * args) | |
1114 | { | |
1115 | expressionS term; | |
1116 | int rnum; | |
1117 | const char *p; | |
1118 | char *q; | |
1119 | ||
1120 | p = parse_exp (args, &term); | |
1121 | if (*p++ != ',') | |
1122 | { | |
1123 | error (_("bad intruction syntax")); | |
1124 | return p; | |
1125 | } | |
1126 | ||
1127 | if ((term.X_md) || (term.X_op != O_register)) | |
1128 | ill_op (); | |
1129 | else | |
1130 | switch (term.X_add_number) | |
1131 | { | |
1132 | case REG_A: | |
1133 | p = emit_s (0, prefix, p); | |
1134 | break; | |
1135 | case REG_HL: | |
1136 | p = parse_exp (p, &term); | |
1137 | if ((!term.X_md) && (term.X_op == O_register)) | |
1138 | { | |
1139 | rnum = term.X_add_number; | |
1140 | if (R_ARITH == (rnum & (R_ARITH | R_INDEX))) | |
1141 | { | |
1142 | q = frag_more (2); | |
1143 | *q++ = 0xED; | |
1144 | *q = opcode + ((rnum & 3) << 4); | |
1145 | break; | |
1146 | } | |
1147 | } | |
1148 | /* Fall through. */ | |
1149 | default: | |
1150 | ill_op (); | |
1151 | } | |
1152 | return p; | |
1153 | } | |
1154 | ||
1155 | static const char * | |
1156 | emit_add (char prefix, char opcode, const char * args) | |
1157 | { | |
1158 | expressionS term; | |
1159 | int lhs, rhs; | |
1160 | const char *p; | |
1161 | char *q; | |
1162 | ||
1163 | p = parse_exp (args, &term); | |
1164 | if (*p++ != ',') | |
1165 | { | |
1166 | error (_("bad intruction syntax")); | |
1167 | return p; | |
1168 | } | |
1169 | ||
1170 | if ((term.X_md) || (term.X_op != O_register)) | |
1171 | ill_op (); | |
1172 | else | |
1173 | switch (term.X_add_number & ~R_INDEX) | |
1174 | { | |
1175 | case REG_A: | |
1176 | p = emit_s (0, prefix, p); | |
1177 | break; | |
1178 | case REG_HL: | |
1179 | lhs = term.X_add_number; | |
1180 | p = parse_exp (p, &term); | |
1181 | if ((!term.X_md) && (term.X_op == O_register)) | |
1182 | { | |
1183 | rhs = term.X_add_number; | |
1184 | if ((rhs & R_ARITH) | |
1185 | && ((rhs == lhs) || ((rhs & ~R_INDEX) != REG_HL))) | |
1186 | { | |
1187 | q = frag_more ((lhs & R_INDEX) ? 2 : 1); | |
1188 | if (lhs & R_INDEX) | |
1189 | *q++ = (lhs & R_IX) ? 0xDD : 0xFD; | |
1190 | *q = opcode + ((rhs & 3) << 4); | |
1191 | break; | |
1192 | } | |
1193 | } | |
1194 | /* Fall through. */ | |
1195 | default: | |
1196 | ill_op (); | |
1197 | } | |
1198 | return p; | |
1199 | } | |
1200 | ||
1201 | static const char * | |
1202 | emit_bit (char prefix, char opcode, const char * args) | |
1203 | { | |
1204 | expressionS b; | |
1205 | int bn; | |
1206 | const char *p; | |
1207 | ||
1208 | p = parse_exp (args, &b); | |
1209 | if (*p++ != ',') | |
1210 | error (_("bad intruction syntax")); | |
1211 | ||
1212 | bn = b.X_add_number; | |
1213 | if ((!b.X_md) | |
1214 | && (b.X_op == O_constant) | |
1215 | && (0 <= bn) | |
1216 | && (bn < 8)) | |
1217 | { | |
1218 | if (opcode == 0x40) | |
1219 | /* Bit : no optional third operand. */ | |
1220 | p = emit_m (prefix, opcode + (bn << 3), p); | |
1221 | else | |
1222 | /* Set, res : resulting byte can be copied to register. */ | |
1223 | p = emit_mr (prefix, opcode + (bn << 3), p); | |
1224 | } | |
1225 | else | |
1226 | ill_op (); | |
1227 | return p; | |
1228 | } | |
1229 | ||
1230 | static const char * | |
1231 | emit_jpcc (char prefix, char opcode, const char * args) | |
1232 | { | |
1233 | char cc; | |
1234 | const char *p; | |
1235 | ||
1236 | p = parse_cc (args, & cc); | |
1237 | if (p && *p++ == ',') | |
1238 | p = emit_call (0, opcode + cc, p); | |
1239 | else | |
1240 | p = (prefix == (char)0xC3) | |
1241 | ? emit_jp (0xE9, prefix, args) | |
1242 | : emit_call (0, prefix, args); | |
1243 | return p; | |
1244 | } | |
1245 | ||
1246 | static const char * | |
1247 | emit_jrcc (char prefix, char opcode, const char * args) | |
1248 | { | |
1249 | char cc; | |
1250 | const char *p; | |
1251 | ||
1252 | p = parse_cc (args, &cc); | |
1253 | if (p && *p++ == ',') | |
1254 | { | |
1255 | if (cc > (3 << 3)) | |
1256 | error (_("condition code invalid for jr")); | |
1257 | else | |
1258 | p = emit_jr (0, opcode + cc, p); | |
1259 | } | |
1260 | else | |
1261 | p = emit_jr (0, prefix, args); | |
1262 | ||
1263 | return p; | |
1264 | } | |
1265 | ||
1266 | static const char * | |
1267 | emit_ex (char prefix_in ATTRIBUTE_UNUSED, | |
1268 | char opcode_in ATTRIBUTE_UNUSED, const char * args) | |
1269 | { | |
1270 | expressionS op; | |
1271 | const char * p; | |
1272 | char prefix, opcode; | |
1273 | ||
1274 | p = parse_exp (args, &op); | |
1275 | p = skip_space (p); | |
1276 | if (*p++ != ',') | |
1277 | { | |
1278 | error (_("bad instruction syntax")); | |
1279 | return p; | |
1280 | } | |
1281 | ||
1282 | prefix = opcode = 0; | |
1283 | if (op.X_op == O_register) | |
1284 | switch (op.X_add_number | (op.X_md ? 0x8000 : 0)) | |
1285 | { | |
1286 | case REG_AF: | |
1287 | if (TOLOWER (*p++) == 'a' && TOLOWER (*p++) == 'f') | |
1288 | { | |
1289 | /* The scrubber changes '\'' to '`' in this context. */ | |
1290 | if (*p == '`') | |
1291 | ++p; | |
1292 | opcode = 0x08; | |
1293 | } | |
1294 | break; | |
1295 | case REG_DE: | |
1296 | if (TOLOWER (*p++) == 'h' && TOLOWER (*p++) == 'l') | |
1297 | opcode = 0xEB; | |
1298 | break; | |
1299 | case REG_SP|0x8000: | |
1300 | p = parse_exp (p, & op); | |
1301 | if (op.X_op == O_register | |
1302 | && op.X_md == 0 | |
1303 | && (op.X_add_number & ~R_INDEX) == REG_HL) | |
1304 | { | |
1305 | opcode = 0xE3; | |
1306 | if (R_INDEX & op.X_add_number) | |
1307 | prefix = (R_IX & op.X_add_number) ? 0xDD : 0xFD; | |
1308 | } | |
1309 | break; | |
1310 | } | |
1311 | if (opcode) | |
1312 | emit_insn (prefix, opcode, p); | |
1313 | else | |
1314 | ill_op (); | |
1315 | ||
1316 | return p; | |
1317 | } | |
1318 | ||
1319 | static const char * | |
1320 | emit_in (char prefix ATTRIBUTE_UNUSED, char opcode ATTRIBUTE_UNUSED, | |
1321 | const char * args) | |
1322 | { | |
1323 | expressionS reg, port; | |
1324 | const char *p; | |
1325 | char *q; | |
1326 | ||
1327 | p = parse_exp (args, ®); | |
1328 | if (*p++ != ',') | |
1329 | { | |
1330 | error (_("bad intruction syntax")); | |
1331 | return p; | |
1332 | } | |
1333 | ||
1334 | p = parse_exp (p, &port); | |
1335 | if (reg.X_md == 0 | |
1336 | && reg.X_op == O_register | |
1337 | && (reg.X_add_number <= 7 || reg.X_add_number == REG_F) | |
1338 | && (port.X_md)) | |
1339 | { | |
1340 | if (port.X_op != O_md1 && port.X_op != O_register) | |
1341 | { | |
1342 | if (REG_A == reg.X_add_number) | |
1343 | { | |
1344 | q = frag_more (1); | |
1345 | *q = 0xDB; | |
1346 | emit_byte (&port, BFD_RELOC_8); | |
1347 | } | |
1348 | else | |
1349 | ill_op (); | |
1350 | } | |
1351 | else | |
1352 | { | |
1353 | if (port.X_add_number == REG_C) | |
1354 | { | |
1355 | if (reg.X_add_number == REG_F) | |
1356 | check_mach (INS_UNDOC); | |
1357 | else | |
1358 | { | |
1359 | q = frag_more (2); | |
1360 | *q++ = 0xED; | |
1361 | *q = 0x40|((reg.X_add_number&7)<<3); | |
1362 | } | |
1363 | } | |
1364 | else | |
1365 | ill_op (); | |
1366 | } | |
1367 | } | |
1368 | else | |
1369 | ill_op (); | |
1370 | return p; | |
1371 | } | |
1372 | ||
1373 | static const char * | |
1374 | emit_out (char prefix ATTRIBUTE_UNUSED, char opcode ATTRIBUTE_UNUSED, | |
1375 | const char * args) | |
1376 | { | |
1377 | expressionS reg, port; | |
1378 | const char *p; | |
1379 | char *q; | |
1380 | ||
1381 | p = parse_exp (args, & port); | |
1382 | if (*p++ != ',') | |
1383 | { | |
1384 | error (_("bad intruction syntax")); | |
1385 | return p; | |
1386 | } | |
1387 | p = parse_exp (p, ®); | |
1388 | if (!port.X_md) | |
1389 | { ill_op (); return p; } | |
1390 | /* Allow "out (c), 0" as unportable instruction. */ | |
1391 | if (reg.X_op == O_constant && reg.X_add_number == 0) | |
1392 | { | |
1393 | check_mach (INS_UNPORT); | |
1394 | reg.X_op = O_register; | |
1395 | reg.X_add_number = 6; | |
1396 | } | |
1397 | if (reg.X_md | |
1398 | || reg.X_op != O_register | |
1399 | || reg.X_add_number > 7) | |
1400 | ill_op (); | |
1401 | else | |
1402 | if (port.X_op != O_register && port.X_op != O_md1) | |
1403 | { | |
1404 | if (REG_A == reg.X_add_number) | |
1405 | { | |
1406 | q = frag_more (1); | |
1407 | *q = 0xD3; | |
1408 | emit_byte (&port, BFD_RELOC_8); | |
1409 | } | |
1410 | else | |
1411 | ill_op (); | |
1412 | } | |
1413 | else | |
1414 | { | |
1415 | if (REG_C == port.X_add_number) | |
1416 | { | |
1417 | q = frag_more (2); | |
1418 | *q++ = 0xED; | |
1419 | *q = 0x41 | (reg.X_add_number << 3); | |
1420 | } | |
1421 | else | |
1422 | ill_op (); | |
1423 | } | |
1424 | return p; | |
1425 | } | |
1426 | ||
1427 | static const char * | |
1428 | emit_rst (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) | |
1429 | { | |
1430 | expressionS addr; | |
1431 | const char *p; | |
1432 | char *q; | |
1433 | ||
1434 | p = parse_exp (args, &addr); | |
1435 | if (addr.X_op != O_constant) | |
1436 | { | |
1437 | error ("rst needs constant address"); | |
1438 | return p; | |
1439 | } | |
1440 | ||
1441 | if (addr.X_add_number & ~(7 << 3)) | |
1442 | ill_op (); | |
1443 | else | |
1444 | { | |
1445 | q = frag_more (1); | |
1446 | *q = opcode + (addr.X_add_number & (7 << 3)); | |
1447 | } | |
1448 | return p; | |
1449 | } | |
1450 | ||
1451 | static void | |
1452 | emit_ldxhl (char prefix, char opcode, expressionS *src, expressionS *d) | |
1453 | { | |
1454 | char *q; | |
1455 | ||
1456 | if (src->X_md) | |
1457 | ill_op (); | |
1458 | else | |
1459 | { | |
1460 | if (src->X_op == O_register) | |
1461 | { | |
1462 | if (src->X_add_number>7) | |
1463 | ill_op (); | |
1464 | if (prefix) | |
1465 | { | |
1466 | q = frag_more (2); | |
1467 | *q++ = prefix; | |
1468 | } | |
1469 | else | |
1470 | q = frag_more (1); | |
1471 | *q = opcode + src->X_add_number; | |
1472 | if (d) | |
1473 | emit_byte (d, BFD_RELOC_Z80_DISP8); | |
1474 | } | |
1475 | else | |
1476 | { | |
1477 | if (prefix) | |
1478 | { | |
1479 | q = frag_more (2); | |
1480 | *q++ = prefix; | |
1481 | } | |
1482 | else | |
1483 | q = frag_more (1); | |
1484 | *q = opcode^0x46; | |
1485 | if (d) | |
1486 | emit_byte (d, BFD_RELOC_Z80_DISP8); | |
1487 | emit_byte (src, BFD_RELOC_8); | |
1488 | } | |
1489 | } | |
1490 | } | |
1491 | ||
1492 | static void | |
1493 | emit_ldreg (int dest, expressionS * src) | |
1494 | { | |
1495 | char *q; | |
1496 | int rnum; | |
1497 | ||
1498 | switch (dest) | |
1499 | { | |
1500 | /* 8 Bit ld group: */ | |
1501 | case REG_I: | |
1502 | case REG_R: | |
1503 | if (src->X_md == 0 && src->X_op == O_register && src->X_add_number == REG_A) | |
1504 | { | |
1505 | q = frag_more (2); | |
1506 | *q++ = 0xED; | |
1507 | *q = (dest == REG_I) ? 0x47 : 0x4F; | |
1508 | } | |
1509 | else | |
1510 | ill_op (); | |
1511 | break; | |
1512 | ||
1513 | case REG_A: | |
1514 | if ((src->X_md) && src->X_op != O_register && src->X_op != O_md1) | |
1515 | { | |
1516 | q = frag_more (1); | |
1517 | *q = 0x3A; | |
1518 | emit_word (src); | |
1519 | break; | |
1520 | } | |
1521 | ||
1522 | if ((src->X_md) | |
1523 | && src->X_op == O_register | |
1524 | && (src->X_add_number == REG_BC || src->X_add_number == REG_DE)) | |
1525 | { | |
1526 | q = frag_more (1); | |
1527 | *q = 0x0A + ((dest & 1) << 4); | |
1528 | break; | |
1529 | } | |
1530 | ||
1531 | if ((!src->X_md) | |
1532 | && src->X_op == O_register | |
1533 | && (src->X_add_number == REG_R || src->X_add_number == REG_I)) | |
1534 | { | |
1535 | q = frag_more (2); | |
1536 | *q++ = 0xED; | |
1537 | *q = (src->X_add_number == REG_I) ? 0x57 : 0x5F; | |
1538 | break; | |
1539 | } | |
1540 | /* Fall through. */ | |
1541 | case REG_B: | |
1542 | case REG_C: | |
1543 | case REG_D: | |
1544 | case REG_E: | |
1545 | emit_sx (0, 0x40 + (dest << 3), src); | |
1546 | break; | |
1547 | ||
1548 | case REG_H: | |
1549 | case REG_L: | |
1550 | if ((src->X_md == 0) | |
1551 | && (src->X_op == O_register) | |
1552 | && (src->X_add_number & R_INDEX)) | |
1553 | ill_op (); | |
1554 | else | |
1555 | emit_sx (0, 0x40 + (dest << 3), src); | |
1556 | break; | |
1557 | ||
1558 | case R_IX | REG_H: | |
1559 | case R_IX | REG_L: | |
1560 | case R_IY | REG_H: | |
1561 | case R_IY | REG_L: | |
1562 | if (src->X_md) | |
1563 | { | |
1564 | ill_op (); | |
1565 | break; | |
1566 | } | |
1567 | check_mach (INS_UNDOC); | |
1568 | if (src-> X_op == O_register) | |
1569 | { | |
1570 | rnum = src->X_add_number; | |
1571 | if ((rnum & ~R_INDEX) < 8 | |
1572 | && ((rnum & R_INDEX) == (dest & R_INDEX) | |
1573 | || ( (rnum & ~R_INDEX) != REG_H | |
1574 | && (rnum & ~R_INDEX) != REG_L))) | |
1575 | { | |
1576 | q = frag_more (2); | |
1577 | *q++ = (dest & R_IX) ? 0xDD : 0xFD; | |
1578 | *q = 0x40 + ((dest & 0x07) << 3) + (rnum & 7); | |
1579 | } | |
1580 | else | |
1581 | ill_op (); | |
1582 | } | |
1583 | else | |
1584 | { | |
1585 | q = frag_more (2); | |
1586 | *q++ = (dest & R_IX) ? 0xDD : 0xFD; | |
1587 | *q = 0x06 + ((dest & 0x07) << 3); | |
1588 | emit_byte (src, BFD_RELOC_8); | |
1589 | } | |
1590 | break; | |
1591 | ||
1592 | /* 16 Bit ld group: */ | |
1593 | case REG_SP: | |
1594 | if (src->X_md == 0 | |
1595 | && src->X_op == O_register | |
1596 | && REG_HL == (src->X_add_number &~ R_INDEX)) | |
1597 | { | |
1598 | q = frag_more ((src->X_add_number & R_INDEX) ? 2 : 1); | |
1599 | if (src->X_add_number & R_INDEX) | |
1600 | *q++ = (src->X_add_number & R_IX) ? 0xDD : 0xFD; | |
1601 | *q = 0xF9; | |
1602 | break; | |
1603 | } | |
1604 | /* Fall through. */ | |
1605 | case REG_BC: | |
1606 | case REG_DE: | |
1607 | if (src->X_op == O_register || src->X_op != O_md1) | |
1608 | ill_op (); | |
1609 | q = frag_more (src->X_md ? 2 : 1); | |
1610 | if (src->X_md) | |
1611 | { | |
1612 | *q++ = 0xED; | |
1613 | *q = 0x4B + ((dest & 3) << 4); | |
1614 | } | |
1615 | else | |
1616 | *q = 0x01 + ((dest & 3) << 4); | |
1617 | emit_word (src); | |
1618 | break; | |
1619 | ||
1620 | case REG_HL: | |
1621 | case REG_HL | R_IX: | |
1622 | case REG_HL | R_IY: | |
1623 | if (src->X_op == O_register || src->X_op == O_md1) | |
1624 | ill_op (); | |
1625 | q = frag_more ((dest & R_INDEX) ? 2 : 1); | |
1626 | if (dest & R_INDEX) | |
1627 | * q ++ = (dest & R_IX) ? 0xDD : 0xFD; | |
1628 | *q = (src->X_md) ? 0x2A : 0x21; | |
1629 | emit_word (src); | |
1630 | break; | |
1631 | ||
1632 | case REG_AF: | |
1633 | case REG_F: | |
1634 | ill_op (); | |
1635 | break; | |
1636 | ||
1637 | default: | |
1638 | abort (); | |
1639 | } | |
1640 | } | |
1641 | ||
1642 | static const char * | |
1643 | emit_ld (char prefix_in ATTRIBUTE_UNUSED, char opcode_in ATTRIBUTE_UNUSED, | |
1644 | const char * args) | |
1645 | { | |
1646 | expressionS dst, src; | |
1647 | const char *p; | |
1648 | char *q; | |
1649 | char prefix, opcode; | |
1650 | ||
1651 | p = parse_exp (args, &dst); | |
1652 | if (*p++ != ',') | |
1653 | error (_("bad intruction syntax")); | |
1654 | p = parse_exp (p, &src); | |
1655 | ||
1656 | switch (dst.X_op) | |
1657 | { | |
1658 | case O_md1: | |
1659 | emit_ldxhl ((dst.X_add_number & R_IX) ? 0xDD : 0xFD, 0x70, | |
1660 | &src, symbol_get_value_expression (dst.X_add_symbol)); | |
1661 | break; | |
1662 | ||
1663 | case O_register: | |
1664 | if (dst.X_md) | |
1665 | { | |
1666 | switch (dst.X_add_number) | |
1667 | { | |
1668 | case REG_BC: | |
1669 | case REG_DE: | |
1670 | if (src.X_md == 0 && src.X_op == O_register && src.X_add_number == REG_A) | |
1671 | { | |
1672 | q = frag_more (1); | |
1673 | *q = 0x02 + ( (dst.X_add_number & 1) << 4); | |
1674 | } | |
1675 | else | |
1676 | ill_op (); | |
1677 | break; | |
1678 | case REG_HL: | |
1679 | emit_ldxhl (0, 0x70, &src, NULL); | |
1680 | break; | |
1681 | default: | |
1682 | ill_op (); | |
1683 | } | |
1684 | } | |
1685 | else | |
1686 | emit_ldreg (dst.X_add_number, &src); | |
1687 | break; | |
1688 | ||
1689 | default: | |
1690 | if (src.X_md != 0 || src.X_op != O_register) | |
1691 | ill_op (); | |
1692 | prefix = opcode = 0; | |
1693 | switch (src.X_add_number) | |
1694 | { | |
1695 | case REG_A: | |
1696 | opcode = 0x32; break; | |
1697 | case REG_BC: case REG_DE: case REG_SP: | |
1698 | prefix = 0xED; opcode = 0x43 + ((src.X_add_number&3)<<4); break; | |
1699 | case REG_HL: | |
1700 | opcode = 0x22; break; | |
1701 | case REG_HL|R_IX: | |
1702 | prefix = 0xDD; opcode = 0x22; break; | |
1703 | case REG_HL|R_IY: | |
1704 | prefix = 0xFD; opcode = 0x22; break; | |
1705 | } | |
1706 | if (opcode) | |
1707 | { | |
1708 | q = frag_more (prefix?2:1); | |
1709 | if (prefix) | |
1710 | *q++ = prefix; | |
1711 | *q = opcode; | |
1712 | emit_word (&dst); | |
1713 | } | |
1714 | else | |
1715 | ill_op (); | |
1716 | } | |
1717 | return p; | |
1718 | } | |
1719 | ||
1720 | static const char * | |
1721 | emit_data (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) | |
1722 | { | |
1723 | const char *p, *q; | |
1724 | char *u, quote; | |
1725 | int cnt; | |
1726 | expressionS exp; | |
1727 | ||
1728 | p = skip_space (args); | |
1729 | if (!*p) | |
1730 | error (_("missing operand")); | |
1731 | ||
1732 | while (*p) | |
1733 | { | |
1734 | if (*p == '\"' || *p == '\'') | |
1735 | { | |
1736 | if (opcode == 1) | |
1737 | { | |
1738 | for (quote = *p, q = ++p, cnt = 0; *p && quote != *p; ++p, ++cnt) | |
1739 | ; | |
1740 | u = frag_more (cnt); | |
1741 | memcpy (u, q, cnt); | |
1742 | if (!*p) | |
1743 | as_warn (_("unterminated string")); | |
1744 | else | |
1745 | p = skip_space (p+1); | |
1746 | } | |
1747 | else | |
1748 | { | |
1749 | ill_op (); | |
1750 | break; | |
1751 | } | |
1752 | } | |
1753 | else | |
1754 | { | |
1755 | p = parse_exp (p, &exp); | |
1756 | if (exp.X_op == O_md1 || exp.X_op == O_register) | |
1757 | { | |
1758 | ill_op (); | |
1759 | break; | |
1760 | } | |
1761 | if (exp.X_md) | |
1762 | as_warn (_("parentheses ignored")); | |
1763 | if (opcode == 1) | |
1764 | emit_byte (&exp, BFD_RELOC_8); | |
1765 | else | |
1766 | emit_word (&exp); | |
1767 | p = skip_space (p); | |
1768 | } | |
1769 | if (*p) | |
1770 | { | |
1771 | if (*p != ',') | |
1772 | as_warn (_("missing ','")); | |
1773 | else | |
1774 | ++p; | |
1775 | } | |
1776 | } | |
1777 | return p; | |
1778 | } | |
1779 | ||
1780 | static const char * | |
1781 | emit_mulub (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) | |
1782 | { | |
1783 | const char *p; | |
1784 | ||
1785 | p = skip_space (args); | |
1786 | if (TOLOWER (*p++) != 'a' || *p++ != ',') | |
1787 | ill_op (); | |
1788 | else | |
1789 | { | |
1790 | char *q, reg; | |
1791 | ||
1792 | reg = TOLOWER (*p++); | |
1793 | switch (reg) | |
1794 | { | |
1795 | case 'b': | |
1796 | case 'c': | |
1797 | case 'd': | |
1798 | case 'e': | |
1799 | check_mach (INS_R800); | |
1800 | if (!*skip_space (p)) | |
1801 | { | |
1802 | q = frag_more (2); | |
1803 | *q++ = prefix; | |
1804 | *q = opcode + ((reg - 'b') << 3); | |
1805 | break; | |
1806 | } | |
1807 | default: | |
1808 | ill_op (); | |
1809 | } | |
1810 | } | |
1811 | return p; | |
1812 | } | |
1813 | ||
1814 | static const char * | |
1815 | emit_muluw (char prefix ATTRIBUTE_UNUSED, char opcode, const char * args) | |
1816 | { | |
1817 | const char *p; | |
1818 | ||
1819 | p = skip_space (args); | |
1820 | if (TOLOWER (*p++) != 'h' || TOLOWER (*p++) != 'l' || *p++ != ',') | |
1821 | ill_op (); | |
1822 | else | |
1823 | { | |
1824 | expressionS reg; | |
1825 | char *q; | |
1826 | ||
1827 | p = parse_exp (p, & reg); | |
1828 | ||
1829 | if ((!reg.X_md) && reg.X_op == O_register) | |
1830 | switch (reg.X_add_number) | |
1831 | { | |
1832 | case REG_BC: | |
1833 | case REG_SP: | |
1834 | check_mach (INS_R800); | |
1835 | q = frag_more (2); | |
1836 | *q++ = prefix; | |
1837 | *q = opcode + ((reg.X_add_number & 3) << 4); | |
1838 | break; | |
1839 | default: | |
1840 | ill_op (); | |
1841 | } | |
1842 | } | |
1843 | return p; | |
1844 | } | |
1845 | ||
1846 | static table_t instab[] = | |
1847 | { | |
1848 | { "adc", 0x88, 0x4A, emit_adc }, | |
1849 | { "add", 0x80, 0x09, emit_add }, | |
1850 | { "and", 0x00, 0xA0, emit_s }, | |
1851 | { "bit", 0xCB, 0x40, emit_bit }, | |
1852 | { "call", 0xCD, 0xC4, emit_jpcc }, | |
1853 | { "ccf", 0x00, 0x3F, emit_insn }, | |
1854 | { "cp", 0x00, 0xB8, emit_s }, | |
1855 | { "cpd", 0xED, 0xA9, emit_insn }, | |
1856 | { "cpdr", 0xED, 0xB9, emit_insn }, | |
1857 | { "cpi", 0xED, 0xA1, emit_insn }, | |
1858 | { "cpir", 0xED, 0xB1, emit_insn }, | |
1859 | { "cpl", 0x00, 0x2F, emit_insn }, | |
1860 | { "daa", 0x00, 0x27, emit_insn }, | |
1861 | { "db", 0x00, 0x01, emit_data }, | |
1862 | { "dec", 0x0B, 0x05, emit_incdec }, | |
1863 | { "defb", 0x00, 0x01, emit_data }, | |
1864 | { "defw", 0x00, 0x02, emit_data }, | |
1865 | { "di", 0x00, 0xF3, emit_insn }, | |
1866 | { "djnz", 0x00, 0x10, emit_jr }, | |
1867 | { "dw", 0x00, 0x02, emit_data }, | |
1868 | { "ei", 0x00, 0xFB, emit_insn }, | |
1869 | { "ex", 0x00, 0x00, emit_ex}, | |
1870 | { "exx", 0x00, 0xD9, emit_insn }, | |
1871 | { "halt", 0x00, 0x76, emit_insn }, | |
1872 | { "im", 0xED, 0x46, emit_im }, | |
1873 | { "in", 0x00, 0x00, emit_in }, | |
1874 | { "inc", 0x03, 0x04, emit_incdec }, | |
1875 | { "ind", 0xED, 0xAA, emit_insn }, | |
1876 | { "indr", 0xED, 0xBA, emit_insn }, | |
1877 | { "ini", 0xED, 0xA2, emit_insn }, | |
1878 | { "inir", 0xED, 0xB2, emit_insn }, | |
1879 | { "jp", 0xC3, 0xC2, emit_jpcc }, | |
1880 | { "jr", 0x18, 0x20, emit_jrcc }, | |
1881 | { "ld", 0x00, 0x00, emit_ld }, | |
1882 | { "ldd", 0xED, 0xA8, emit_insn }, | |
1883 | { "lddr", 0xED, 0xB8, emit_insn }, | |
1884 | { "ldi", 0xED, 0xA0, emit_insn }, | |
1885 | { "ldir", 0xED, 0xB0, emit_insn }, | |
1886 | { "mulub", 0xED, 0xC5, emit_mulub }, /* R800 only. */ | |
1887 | { "muluw", 0xED, 0xC3, emit_muluw }, /* R800 only. */ | |
1888 | { "neg", 0xed, 0x44, emit_insn }, | |
1889 | { "nop", 0x00, 0x00, emit_insn }, | |
1890 | { "or", 0x00, 0xB0, emit_s }, | |
1891 | { "otdr", 0xED, 0xBB, emit_insn }, | |
1892 | { "otir", 0xED, 0xB3, emit_insn }, | |
1893 | { "out", 0x00, 0x00, emit_out }, | |
1894 | { "outd", 0xED, 0xAB, emit_insn }, | |
1895 | { "outi", 0xED, 0xA3, emit_insn }, | |
1896 | { "pop", 0x00, 0xC1, emit_pop }, | |
1897 | { "push", 0x00, 0xC5, emit_pop }, | |
1898 | { "res", 0xCB, 0x80, emit_bit }, | |
1899 | { "ret", 0xC9, 0xC0, emit_retcc }, | |
1900 | { "reti", 0xED, 0x4D, emit_insn }, | |
1901 | { "retn", 0xED, 0x45, emit_insn }, | |
1902 | { "rl", 0xCB, 0x10, emit_mr }, | |
1903 | { "rla", 0x00, 0x17, emit_insn }, | |
1904 | { "rlc", 0xCB, 0x00, emit_mr }, | |
1905 | { "rlca", 0x00, 0x07, emit_insn }, | |
1906 | { "rld", 0xED, 0x6F, emit_insn }, | |
1907 | { "rr", 0xCB, 0x18, emit_mr }, | |
1908 | { "rra", 0x00, 0x1F, emit_insn }, | |
1909 | { "rrc", 0xCB, 0x08, emit_mr }, | |
1910 | { "rrca", 0x00, 0x0F, emit_insn }, | |
1911 | { "rrd", 0xED, 0x67, emit_insn }, | |
1912 | { "rst", 0x00, 0xC7, emit_rst}, | |
1913 | { "sbc", 0x98, 0x42, emit_adc }, | |
1914 | { "scf", 0x00, 0x37, emit_insn }, | |
1915 | { "set", 0xCB, 0xC0, emit_bit }, | |
1916 | { "sla", 0xCB, 0x20, emit_mr }, | |
1917 | { "sli", 0xCB, 0x30, emit_mr }, | |
1918 | { "sll", 0xCB, 0x30, emit_mr }, | |
1919 | { "sra", 0xCB, 0x28, emit_mr }, | |
1920 | { "srl", 0xCB, 0x38, emit_mr }, | |
1921 | { "sub", 0x00, 0x90, emit_s }, | |
1922 | { "xor", 0x00, 0xA8, emit_s }, | |
1923 | } ; | |
1924 | ||
1925 | void | |
1926 | md_assemble (char* str) | |
1927 | { | |
1928 | const char *p; | |
1929 | char * old_ptr; | |
1930 | int i; | |
1931 | table_t *insp; | |
1932 | ||
1933 | err_flag = 0; | |
1934 | old_ptr = input_line_pointer; | |
1935 | p = skip_space (str); | |
1936 | for (i = 0; (i < BUFLEN) && (ISALPHA (*p));) | |
1937 | buf[i++] = TOLOWER (*p++); | |
1938 | ||
1939 | if ((i == BUFLEN) | |
1940 | || ((*p) && (!ISSPACE (*p)))) | |
1941 | as_bad (_("illegal instruction '%s'"), buf); | |
1942 | ||
1943 | buf[i] = 0; | |
1944 | p = skip_space (p); | |
1945 | key = buf; | |
1946 | ||
1947 | insp = bsearch (&key, instab, ARRAY_SIZE (instab), | |
1948 | sizeof (instab[0]), key_cmp); | |
1949 | if (!insp) | |
1950 | as_bad (_("illegal instruction '%s'"), buf); | |
1951 | else | |
1952 | { | |
1953 | p = insp->fp (insp->prefix, insp->opcode, p); | |
1954 | p = skip_space (p); | |
1955 | if ((!err_flag) && *p) | |
1956 | as_bad (_("junk at end of line, first unrecognized character is `%c'"), | |
1957 | *p); | |
1958 | } | |
1959 | input_line_pointer = old_ptr; | |
1960 | } | |
1961 | ||
1962 | void | |
1963 | md_apply_fix (fixS * fixP, valueT* valP, segT seg ATTRIBUTE_UNUSED) | |
1964 | { | |
1965 | long val = * (long *) valP; | |
1966 | char *buf = fixP->fx_where + fixP->fx_frag->fr_literal; | |
1967 | ||
1968 | switch (fixP->fx_r_type) | |
1969 | { | |
1970 | case BFD_RELOC_8_PCREL: | |
1971 | if (fixP->fx_addsy) | |
1972 | { | |
1973 | fixP->fx_no_overflow = 1; | |
1974 | fixP->fx_done = 0; | |
1975 | } | |
1976 | else | |
1977 | { | |
1978 | fixP->fx_no_overflow = (-128 <= val && val < 128); | |
1979 | if (!fixP->fx_no_overflow) | |
1980 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1981 | _("relative jump out of range")); | |
1982 | *buf++ = val; | |
1983 | fixP->fx_done = 1; | |
1984 | } | |
1985 | break; | |
1986 | ||
1987 | case BFD_RELOC_Z80_DISP8: | |
1988 | if (fixP->fx_addsy) | |
1989 | { | |
1990 | fixP->fx_no_overflow = 1; | |
1991 | fixP->fx_done = 0; | |
1992 | } | |
1993 | else | |
1994 | { | |
1995 | fixP->fx_no_overflow = (-128 <= val && val < 128); | |
1996 | if (!fixP->fx_no_overflow) | |
1997 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
1998 | _("index offset out of range")); | |
1999 | *buf++ = val; | |
2000 | fixP->fx_done = 1; | |
2001 | } | |
2002 | break; | |
2003 | ||
2004 | case BFD_RELOC_8: | |
2005 | if (val > 255 || val < -128) | |
2006 | as_warn_where (fixP->fx_file, fixP->fx_line, _("overflow")); | |
2007 | *buf++ = val; | |
2008 | if (fixP->fx_addsy == NULL) | |
2009 | fixP->fx_done = 1; | |
2010 | break; | |
2011 | ||
2012 | case BFD_RELOC_16: | |
2013 | *buf++ = val; | |
2014 | *buf++ = (val >> 8); | |
2015 | if (fixP->fx_addsy == NULL) | |
2016 | fixP->fx_done = 1; | |
2017 | break; | |
2018 | ||
2019 | case BFD_RELOC_32: /* .Long may produce this. */ | |
2020 | *buf++ = val; | |
2021 | *buf++ = (val >> 8); | |
2022 | *buf++ = (val >> 16); | |
2023 | *buf++ = (val >> 24); | |
2024 | if (fixP->fx_addsy == NULL) | |
2025 | fixP->fx_done = 1; | |
2026 | break; | |
2027 | ||
2028 | default: | |
2029 | printf (_("md_apply_fix: unknown r_type 0x%x\n"), fixP->fx_r_type); | |
2030 | abort (); | |
2031 | } | |
2032 | } | |
2033 | ||
2034 | /* GAS will call this to generate a reloc. GAS will pass the | |
2035 | resulting reloc to `bfd_install_relocation'. This currently works | |
2036 | poorly, as `bfd_install_relocation' often does the wrong thing, and | |
2037 | instances of `tc_gen_reloc' have been written to work around the | |
2038 | problems, which in turns makes it difficult to fix | |
2039 | `bfd_install_relocation'. */ | |
2040 | ||
2041 | /* If while processing a fixup, a reloc really | |
2042 | needs to be created then it is done here. */ | |
2043 | ||
2044 | arelent * | |
2045 | tc_gen_reloc (asection *seg ATTRIBUTE_UNUSED , fixS *fixp) | |
2046 | { | |
2047 | arelent *reloc; | |
2048 | ||
2049 | if (! bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type)) | |
2050 | { | |
2051 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
2052 | _("reloc %d not supported by object file format"), | |
2053 | (int) fixp->fx_r_type); | |
2054 | return NULL; | |
2055 | } | |
2056 | ||
2057 | reloc = xmalloc (sizeof (arelent)); | |
2058 | reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); | |
2059 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
2060 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
2061 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
2062 | reloc->addend = fixp->fx_offset; | |
2063 | ||
2064 | return reloc; | |
2065 | } | |
2066 |