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1 /* Assembler interface for targets using CGEN. -*- C -*-
2 CGEN: Cpu tools GENerator
3
4 THIS FILE IS MACHINE GENERATED WITH CGEN.
5 - the resultant file is machine generated, cgen-asm.in isn't
6
7 Copyright 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
8
9 This file is part of the GNU Binutils and GDB, the GNU debugger.
10
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2, or (at your option)
14 any later version.
15
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
20
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software Foundation, Inc.,
23 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
24
25 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
26 Keep that in mind. */
27
28 #include "sysdep.h"
29 #include <ctype.h>
30 #include <stdio.h>
31 #include "ansidecl.h"
32 #include "bfd.h"
33 #include "symcat.h"
34 #include "fr30-desc.h"
35 #include "fr30-opc.h"
36 #include "opintl.h"
37
38 #undef min
39 #define min(a,b) ((a) < (b) ? (a) : (b))
40 #undef max
41 #define max(a,b) ((a) > (b) ? (a) : (b))
42
43 static const char * parse_insn_normal
44 PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *));
45 \f
46 /* -- assembler routines inserted here */
47
48 /* -- asm.c */
49 /* Handle register lists for LDMx and STMx */
50
51 static int
52 parse_register_number (strp)
53 const char **strp;
54 {
55 int regno;
56 if (**strp < '0' || **strp > '9')
57 return -1; /* error */
58 regno = **strp - '0';
59 ++*strp;
60
61 if (**strp >= '0' && **strp <= '9')
62 {
63 regno = regno * 10 + (**strp - '0');
64 ++*strp;
65 }
66
67 return regno;
68 }
69
70 static const char *
71 parse_register_list (cd, strp, opindex, valuep, high_low, load_store)
72 CGEN_CPU_DESC cd;
73 const char **strp;
74 int opindex;
75 unsigned long *valuep;
76 int high_low; /* 0 == high, 1 == low */
77 int load_store; /* 0 == load, 1 == store */
78 {
79 int regno;
80 *valuep = 0;
81 while (**strp && **strp != ')')
82 {
83 if (**strp != 'R' && **strp != 'r')
84 break;
85 ++*strp;
86
87 regno = parse_register_number (strp);
88 if (regno == -1)
89 return "Register number is not valid";
90 if (regno > 7 && !high_low)
91 return "Register must be between r0 and r7";
92 if (regno < 8 && high_low)
93 return "Register must be between r8 and r15";
94
95 if (high_low)
96 regno -= 8;
97
98 if (load_store) /* mask is reversed for store */
99 *valuep |= 0x80 >> regno;
100 else
101 *valuep |= 1 << regno;
102
103 if (**strp == ',')
104 {
105 if (*(*strp + 1) == ')')
106 break;
107 ++*strp;
108 }
109 }
110
111 if (!*strp || **strp != ')')
112 return "Register list is not valid";
113
114 return NULL;
115 }
116
117 static const char *
118 parse_low_register_list_ld (cd, strp, opindex, valuep)
119 CGEN_CPU_DESC cd;
120 const char **strp;
121 int opindex;
122 unsigned long *valuep;
123 {
124 return parse_register_list (cd, strp, opindex, valuep, 0/*low*/, 0/*load*/);
125 }
126
127 static const char *
128 parse_hi_register_list_ld (cd, strp, opindex, valuep)
129 CGEN_CPU_DESC cd;
130 const char **strp;
131 int opindex;
132 unsigned long *valuep;
133 {
134 return parse_register_list (cd, strp, opindex, valuep, 1/*high*/, 0/*load*/);
135 }
136
137 static const char *
138 parse_low_register_list_st (cd, strp, opindex, valuep)
139 CGEN_CPU_DESC cd;
140 const char **strp;
141 int opindex;
142 unsigned long *valuep;
143 {
144 return parse_register_list (cd, strp, opindex, valuep, 0/*low*/, 1/*store*/);
145 }
146
147 static const char *
148 parse_hi_register_list_st (cd, strp, opindex, valuep)
149 CGEN_CPU_DESC cd;
150 const char **strp;
151 int opindex;
152 unsigned long *valuep;
153 {
154 return parse_register_list (cd, strp, opindex, valuep, 1/*high*/, 1/*store*/);
155 }
156
157 /* -- */
158
159 /* Main entry point for operand parsing.
160
161 This function is basically just a big switch statement. Earlier versions
162 used tables to look up the function to use, but
163 - if the table contains both assembler and disassembler functions then
164 the disassembler contains much of the assembler and vice-versa,
165 - there's a lot of inlining possibilities as things grow,
166 - using a switch statement avoids the function call overhead.
167
168 This function could be moved into `parse_insn_normal', but keeping it
169 separate makes clear the interface between `parse_insn_normal' and each of
170 the handlers.
171 */
172
173 const char *
174 fr30_cgen_parse_operand (cd, opindex, strp, fields)
175 CGEN_CPU_DESC cd;
176 int opindex;
177 const char ** strp;
178 CGEN_FIELDS * fields;
179 {
180 const char * errmsg = NULL;
181 /* Used by scalar operands that still need to be parsed. */
182 long junk;
183
184 switch (opindex)
185 {
186 case FR30_OPERAND_CRI :
187 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_cr_names, & fields->f_CRi);
188 break;
189 case FR30_OPERAND_CRJ :
190 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_cr_names, & fields->f_CRj);
191 break;
192 case FR30_OPERAND_R13 :
193 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r13, & junk);
194 break;
195 case FR30_OPERAND_R14 :
196 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r14, & junk);
197 break;
198 case FR30_OPERAND_R15 :
199 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r15, & junk);
200 break;
201 case FR30_OPERAND_RI :
202 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Ri);
203 break;
204 case FR30_OPERAND_RIC :
205 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Ric);
206 break;
207 case FR30_OPERAND_RJ :
208 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Rj);
209 break;
210 case FR30_OPERAND_RJC :
211 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Rjc);
212 break;
213 case FR30_OPERAND_RS1 :
214 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_dr_names, & fields->f_Rs1);
215 break;
216 case FR30_OPERAND_RS2 :
217 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_dr_names, & fields->f_Rs2);
218 break;
219 case FR30_OPERAND_CC :
220 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_CC, &fields->f_cc);
221 break;
222 case FR30_OPERAND_CCC :
223 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_CCC, &fields->f_ccc);
224 break;
225 case FR30_OPERAND_DIR10 :
226 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR10, &fields->f_dir10);
227 break;
228 case FR30_OPERAND_DIR8 :
229 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR8, &fields->f_dir8);
230 break;
231 case FR30_OPERAND_DIR9 :
232 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR9, &fields->f_dir9);
233 break;
234 case FR30_OPERAND_DISP10 :
235 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP10, &fields->f_disp10);
236 break;
237 case FR30_OPERAND_DISP8 :
238 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP8, &fields->f_disp8);
239 break;
240 case FR30_OPERAND_DISP9 :
241 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP9, &fields->f_disp9);
242 break;
243 case FR30_OPERAND_I20 :
244 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I20, &fields->f_i20);
245 break;
246 case FR30_OPERAND_I32 :
247 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I32, &fields->f_i32);
248 break;
249 case FR30_OPERAND_I8 :
250 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I8, &fields->f_i8);
251 break;
252 case FR30_OPERAND_LABEL12 :
253 {
254 bfd_vma value;
255 errmsg = cgen_parse_address (cd, strp, FR30_OPERAND_LABEL12, 0, NULL, & value);
256 fields->f_rel12 = value;
257 }
258 break;
259 case FR30_OPERAND_LABEL9 :
260 {
261 bfd_vma value;
262 errmsg = cgen_parse_address (cd, strp, FR30_OPERAND_LABEL9, 0, NULL, & value);
263 fields->f_rel9 = value;
264 }
265 break;
266 case FR30_OPERAND_M4 :
267 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_M4, &fields->f_m4);
268 break;
269 case FR30_OPERAND_PS :
270 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_ps, & junk);
271 break;
272 case FR30_OPERAND_REGLIST_HI_LD :
273 errmsg = parse_hi_register_list_ld (cd, strp, FR30_OPERAND_REGLIST_HI_LD, &fields->f_reglist_hi_ld);
274 break;
275 case FR30_OPERAND_REGLIST_HI_ST :
276 errmsg = parse_hi_register_list_st (cd, strp, FR30_OPERAND_REGLIST_HI_ST, &fields->f_reglist_hi_st);
277 break;
278 case FR30_OPERAND_REGLIST_LOW_LD :
279 errmsg = parse_low_register_list_ld (cd, strp, FR30_OPERAND_REGLIST_LOW_LD, &fields->f_reglist_low_ld);
280 break;
281 case FR30_OPERAND_REGLIST_LOW_ST :
282 errmsg = parse_low_register_list_st (cd, strp, FR30_OPERAND_REGLIST_LOW_ST, &fields->f_reglist_low_st);
283 break;
284 case FR30_OPERAND_S10 :
285 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_S10, &fields->f_s10);
286 break;
287 case FR30_OPERAND_U10 :
288 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U10, &fields->f_u10);
289 break;
290 case FR30_OPERAND_U4 :
291 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U4, &fields->f_u4);
292 break;
293 case FR30_OPERAND_U4C :
294 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U4C, &fields->f_u4c);
295 break;
296 case FR30_OPERAND_U8 :
297 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U8, &fields->f_u8);
298 break;
299 case FR30_OPERAND_UDISP6 :
300 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_UDISP6, &fields->f_udisp6);
301 break;
302
303 default :
304 /* xgettext:c-format */
305 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
306 abort ();
307 }
308
309 return errmsg;
310 }
311
312 cgen_parse_fn * const fr30_cgen_parse_handlers[] =
313 {
314 parse_insn_normal,
315 };
316
317 void
318 fr30_cgen_init_asm (cd)
319 CGEN_CPU_DESC cd;
320 {
321 fr30_cgen_init_opcode_table (cd);
322 fr30_cgen_init_ibld_table (cd);
323 cd->parse_handlers = & fr30_cgen_parse_handlers[0];
324 cd->parse_operand = fr30_cgen_parse_operand;
325 }
326
327 \f
328 /* Default insn parser.
329
330 The syntax string is scanned and operands are parsed and stored in FIELDS.
331 Relocs are queued as we go via other callbacks.
332
333 ??? Note that this is currently an all-or-nothing parser. If we fail to
334 parse the instruction, we return 0 and the caller will start over from
335 the beginning. Backtracking will be necessary in parsing subexpressions,
336 but that can be handled there. Not handling backtracking here may get
337 expensive in the case of the m68k. Deal with later.
338
339 Returns NULL for success, an error message for failure.
340 */
341
342 static const char *
343 parse_insn_normal (cd, insn, strp, fields)
344 CGEN_CPU_DESC cd;
345 const CGEN_INSN *insn;
346 const char **strp;
347 CGEN_FIELDS *fields;
348 {
349 /* ??? Runtime added insns not handled yet. */
350 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
351 const char *str = *strp;
352 const char *errmsg;
353 const char *p;
354 const CGEN_SYNTAX_CHAR_TYPE * syn;
355 #ifdef CGEN_MNEMONIC_OPERANDS
356 /* FIXME: wip */
357 int past_opcode_p;
358 #endif
359
360 /* For now we assume the mnemonic is first (there are no leading operands).
361 We can parse it without needing to set up operand parsing.
362 GAS's input scrubber will ensure mnemonics are lowercase, but we may
363 not be called from GAS. */
364 p = CGEN_INSN_MNEMONIC (insn);
365 while (*p && tolower (*p) == tolower (*str))
366 ++p, ++str;
367
368 if (* p)
369 return _("unrecognized instruction");
370
371 #ifndef CGEN_MNEMONIC_OPERANDS
372 if (* str && !isspace (* str))
373 return _("unrecognized instruction");
374 #endif
375
376 CGEN_INIT_PARSE (cd);
377 cgen_init_parse_operand (cd);
378 #ifdef CGEN_MNEMONIC_OPERANDS
379 past_opcode_p = 0;
380 #endif
381
382 /* We don't check for (*str != '\0') here because we want to parse
383 any trailing fake arguments in the syntax string. */
384 syn = CGEN_SYNTAX_STRING (syntax);
385
386 /* Mnemonics come first for now, ensure valid string. */
387 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
388 abort ();
389
390 ++syn;
391
392 while (* syn != 0)
393 {
394 /* Non operand chars must match exactly. */
395 if (CGEN_SYNTAX_CHAR_P (* syn))
396 {
397 /* FIXME: While we allow for non-GAS callers above, we assume the
398 first char after the mnemonic part is a space. */
399 /* FIXME: We also take inappropriate advantage of the fact that
400 GAS's input scrubber will remove extraneous blanks. */
401 if (tolower (*str) == tolower (CGEN_SYNTAX_CHAR (* syn)))
402 {
403 #ifdef CGEN_MNEMONIC_OPERANDS
404 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
405 past_opcode_p = 1;
406 #endif
407 ++ syn;
408 ++ str;
409 }
410 else if (*str)
411 {
412 /* Syntax char didn't match. Can't be this insn. */
413 static char msg [80];
414 /* xgettext:c-format */
415 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
416 CGEN_SYNTAX_CHAR(*syn), *str);
417 return msg;
418 }
419 else
420 {
421 /* Ran out of input. */
422 static char msg [80];
423 /* xgettext:c-format */
424 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
425 CGEN_SYNTAX_CHAR(*syn));
426 return msg;
427 }
428 continue;
429 }
430
431 /* We have an operand of some sort. */
432 errmsg = fr30_cgen_parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
433 &str, fields);
434 if (errmsg)
435 return errmsg;
436
437 /* Done with this operand, continue with next one. */
438 ++ syn;
439 }
440
441 /* If we're at the end of the syntax string, we're done. */
442 if (* syn == 0)
443 {
444 /* FIXME: For the moment we assume a valid `str' can only contain
445 blanks now. IE: We needn't try again with a longer version of
446 the insn and it is assumed that longer versions of insns appear
447 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
448 while (isspace (* str))
449 ++ str;
450
451 if (* str != '\0')
452 return _("junk at end of line"); /* FIXME: would like to include `str' */
453
454 return NULL;
455 }
456
457 /* We couldn't parse it. */
458 return _("unrecognized instruction");
459 }
460 \f
461 /* Main entry point.
462 This routine is called for each instruction to be assembled.
463 STR points to the insn to be assembled.
464 We assume all necessary tables have been initialized.
465 The assembled instruction, less any fixups, is stored in BUF.
466 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
467 still needs to be converted to target byte order, otherwise BUF is an array
468 of bytes in target byte order.
469 The result is a pointer to the insn's entry in the opcode table,
470 or NULL if an error occured (an error message will have already been
471 printed).
472
473 Note that when processing (non-alias) macro-insns,
474 this function recurses.
475
476 ??? It's possible to make this cpu-independent.
477 One would have to deal with a few minor things.
478 At this point in time doing so would be more of a curiosity than useful
479 [for example this file isn't _that_ big], but keeping the possibility in
480 mind helps keep the design clean. */
481
482 const CGEN_INSN *
483 fr30_cgen_assemble_insn (cd, str, fields, buf, errmsg)
484 CGEN_CPU_DESC cd;
485 const char *str;
486 CGEN_FIELDS *fields;
487 CGEN_INSN_BYTES_PTR buf;
488 char **errmsg;
489 {
490 const char *start;
491 CGEN_INSN_LIST *ilist;
492 const char *parse_errmsg = NULL;
493 const char *insert_errmsg = NULL;
494
495 /* Skip leading white space. */
496 while (isspace (* str))
497 ++ str;
498
499 /* The instructions are stored in hashed lists.
500 Get the first in the list. */
501 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
502
503 /* Keep looking until we find a match. */
504
505 start = str;
506 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
507 {
508 const CGEN_INSN *insn = ilist->insn;
509
510 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
511 /* not usually needed as unsupported opcodes shouldn't be in the hash lists */
512 /* Is this insn supported by the selected cpu? */
513 if (! fr30_cgen_insn_supported (cd, insn))
514 continue;
515 #endif
516
517 /* If the RELAX attribute is set, this is an insn that shouldn't be
518 chosen immediately. Instead, it is used during assembler/linker
519 relaxation if possible. */
520 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX) != 0)
521 continue;
522
523 str = start;
524
525 /* Allow parse/insert handlers to obtain length of insn. */
526 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
527
528 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
529 if (parse_errmsg != NULL)
530 continue;
531
532 /* ??? 0 is passed for `pc' */
533 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
534 (bfd_vma) 0);
535 if (insert_errmsg != NULL)
536 continue;
537
538 /* It is up to the caller to actually output the insn and any
539 queued relocs. */
540 return insn;
541 }
542
543 {
544 static char errbuf[150];
545 const char *tmp_errmsg;
546
547 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
548 /* If requesting verbose error messages, use insert_errmsg.
549 Failing that, use parse_errmsg */
550 tmp_errmsg = (insert_errmsg ? insert_errmsg :
551 parse_errmsg ? parse_errmsg :
552 _("unrecognized instruction"));
553
554 if (strlen (start) > 50)
555 /* xgettext:c-format */
556 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
557 else
558 /* xgettext:c-format */
559 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
560 #else
561 if (strlen (start) > 50)
562 /* xgettext:c-format */
563 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
564 else
565 /* xgettext:c-format */
566 sprintf (errbuf, _("bad instruction `%.50s'"), start);
567 #endif
568
569 *errmsg = errbuf;
570 return NULL;
571 }
572 }
573 \f
574 #if 0 /* This calls back to GAS which we can't do without care. */
575
576 /* Record each member of OPVALS in the assembler's symbol table.
577 This lets GAS parse registers for us.
578 ??? Interesting idea but not currently used. */
579
580 /* Record each member of OPVALS in the assembler's symbol table.
581 FIXME: Not currently used. */
582
583 void
584 fr30_cgen_asm_hash_keywords (cd, opvals)
585 CGEN_CPU_DESC cd;
586 CGEN_KEYWORD *opvals;
587 {
588 CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL);
589 const CGEN_KEYWORD_ENTRY * ke;
590
591 while ((ke = cgen_keyword_search_next (& search)) != NULL)
592 {
593 #if 0 /* Unnecessary, should be done in the search routine. */
594 if (! fr30_cgen_opval_supported (ke))
595 continue;
596 #endif
597 cgen_asm_record_register (cd, ke->name, ke->value);
598 }
599 }
600
601 #endif /* 0 */