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