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