1 /* DO NOT EDIT! -*- buffer-read-only: t -*- vi:set ro: */
2 /* Assembler interface for targets using CGEN. -*- C -*-
3 CGEN: Cpu tools GENerator
4
5 THIS FILE IS MACHINE GENERATED WITH CGEN.
6 - the resultant file is machine generated, cgen-asm.in isn't
7
8 Copyright (C) 1996-2023 Free Software Foundation, Inc.
9
10 This file is part of libopcodes.
11
12 This library is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 3, or (at your option)
15 any later version.
16
17 It is distributed in the hope that it will be useful, but WITHOUT
18 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
19 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
20 License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software Foundation, Inc.,
24 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
25
26
27 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
28 Keep that in mind. */
29
30 #include "sysdep.h"
31 #include <stdio.h>
32 #include "ansidecl.h"
33 #include "bfd.h"
34 #include "symcat.h"
35 #include "mt-desc.h"
36 #include "mt-opc.h"
37 #include "opintl.h"
38 #include "xregex.h"
39 #include "libiberty.h"
40 #include "safe-ctype.h"
41
42 #undef min
43 #define min(a,b) ((a) < (b) ? (a) : (b))
44 #undef max
45 #define max(a,b) ((a) > (b) ? (a) : (b))
46
47 static const char * parse_insn_normal
48 (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *);
49
50 /* -- assembler routines inserted here. */
51
52 /* -- asm.c */
53 /* Range checking for signed numbers. Returns 0 if acceptable
54 and 1 if the value is out of bounds for a signed quantity. */
55
56 static int
57 signed_out_of_bounds (long val)
58 {
59 if ((val < -32768) || (val > 32767))
60 return 1;
61 return 0;
62 }
63
64 static const char *
65 parse_loopsize (CGEN_CPU_DESC cd,
66 const char **strp,
67 int opindex,
68 void *arg)
69 {
70 signed long * valuep = (signed long *) arg;
71 const char *errmsg;
72 bfd_reloc_code_real_type code = BFD_RELOC_NONE;
73 enum cgen_parse_operand_result result_type;
74 bfd_vma value;
75
76 /* Is it a control transfer instructions? */
77 if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_LOOPSIZE)
78 {
79 code = BFD_RELOC_MT_PCINSN8;
80 errmsg = cgen_parse_address (cd, strp, opindex, code,
81 & result_type, & value);
82 *valuep = value;
83 return errmsg;
84 }
85
86 abort ();
87 }
88
89 static const char *
90 parse_imm16 (CGEN_CPU_DESC cd,
91 const char **strp,
92 int opindex,
93 void *arg)
94 {
95 signed long * valuep = (signed long *) arg;
96 const char *errmsg;
97 enum cgen_parse_operand_result result_type;
98 bfd_reloc_code_real_type code = BFD_RELOC_NONE;
99 bfd_vma value;
100
101 /* Is it a control transfer instructions? */
102 if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_IMM16O)
103 {
104 code = BFD_RELOC_16_PCREL;
105 errmsg = cgen_parse_address (cd, strp, opindex, code,
106 & result_type, & value);
107 if (errmsg == NULL)
108 {
109 if (signed_out_of_bounds (value))
110 errmsg = _("Operand out of range. Must be between -32768 and 32767.");
111 }
112 *valuep = value;
113 return errmsg;
114 }
115
116 /* If it's not a control transfer instruction, then
117 we have to check for %OP relocating operators. */
118 if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_IMM16L)
119 ;
120 else if (strncmp (*strp, "%hi16", 5) == 0)
121 {
122 *strp += 5;
123 code = BFD_RELOC_HI16;
124 }
125 else if (strncmp (*strp, "%lo16", 5) == 0)
126 {
127 *strp += 5;
128 code = BFD_RELOC_LO16;
129 }
130
131 /* If we found a %OP relocating operator, then parse it as an address.
132 If not, we need to parse it as an integer, either signed or unsigned
133 depending on which operand type we have. */
134 if (code != BFD_RELOC_NONE)
135 {
136 /* %OP relocating operator found. */
137 errmsg = cgen_parse_address (cd, strp, opindex, code,
138 & result_type, & value);
139 if (errmsg == NULL)
140 {
141 switch (result_type)
142 {
143 case (CGEN_PARSE_OPERAND_RESULT_NUMBER):
144 if (code == BFD_RELOC_HI16)
145 value = (value >> 16) & 0xFFFF;
146 else if (code == BFD_RELOC_LO16)
147 value = value & 0xFFFF;
148 else
149 errmsg = _("Biiiig Trouble in parse_imm16!");
150 break;
151
152 case (CGEN_PARSE_OPERAND_RESULT_QUEUED):
153 /* No special processing for this case. */
154 break;
155
156 default:
157 errmsg = _("The percent-operator's operand is not a symbol");
158 break;
159 }
160 }
161 *valuep = value;
162 }
163 else
164 {
165 /* Parse hex values like 0xffff as unsigned, and sign extend
166 them manually. */
167 int parse_signed = (opindex == (CGEN_OPERAND_TYPE)MT_OPERAND_IMM16);
168
169 if ((*strp)[0] == '0'
170 && ((*strp)[1] == 'x' || (*strp)[1] == 'X'))
171 parse_signed = 0;
172
173 /* No relocating operator. Parse as an number. */
174 if (parse_signed)
175 {
176 /* Parse as as signed integer. */
177
178 errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
179
180 if (errmsg == NULL)
181 {
182 #if 0
183 /* Manual range checking is needed for the signed case. */
184 if (*valuep & 0x8000)
185 value = 0xffff0000 | *valuep;
186 else
187 value = *valuep;
188
189 if (signed_out_of_bounds (value))
190 errmsg = _("Operand out of range. Must be between -32768 and 32767.");
191 /* Truncate to 16 bits. This is necessary
192 because cgen will have sign extended *valuep. */
193 *valuep &= 0xFFFF;
194 #endif
195 }
196 }
197 else
198 {
199 /* MT_OPERAND_IMM16Z. Parse as an unsigned integer. */
200 errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, (unsigned long *) valuep);
201
202 if (opindex == (CGEN_OPERAND_TYPE) MT_OPERAND_IMM16
203 && *valuep >= 0x8000
204 && *valuep <= 0xffff)
205 *valuep -= 0x10000;
206 }
207 }
208
209 return errmsg;
210 }
211
212
213 static const char *
214 parse_dup (CGEN_CPU_DESC cd,
215 const char **strp,
216 int opindex,
217 unsigned long *valuep)
218 {
219 const char *errmsg = NULL;
220
221 if (strncmp (*strp, "dup", 3) == 0 || strncmp (*strp, "DUP", 3) == 0)
222 {
223 *strp += 3;
224 *valuep = 1;
225 }
226 else if (strncmp (*strp, "xx", 2) == 0 || strncmp (*strp, "XX", 2) == 0)
227 {
228 *strp += 2;
229 *valuep = 0;
230 }
231 else
232 errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
233
234 return errmsg;
235 }
236
237
238 static const char *
239 parse_ball (CGEN_CPU_DESC cd,
240 const char **strp,
241 int opindex,
242 unsigned long *valuep)
243 {
244 const char *errmsg = NULL;
245
246 if (strncmp (*strp, "all", 3) == 0 || strncmp (*strp, "ALL", 3) == 0)
247 {
248 *strp += 3;
249 *valuep = 1;
250 }
251 else if (strncmp (*strp, "one", 3) == 0 || strncmp (*strp, "ONE", 3) == 0)
252 {
253 *strp += 3;
254 *valuep = 0;
255 }
256 else
257 errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
258
259 return errmsg;
260 }
261
262 static const char *
263 parse_xmode (CGEN_CPU_DESC cd,
264 const char **strp,
265 int opindex,
266 unsigned long *valuep)
267 {
268 const char *errmsg = NULL;
269
270 if (strncmp (*strp, "pm", 2) == 0 || strncmp (*strp, "PM", 2) == 0)
271 {
272 *strp += 2;
273 *valuep = 1;
274 }
275 else if (strncmp (*strp, "xm", 2) == 0 || strncmp (*strp, "XM", 2) == 0)
276 {
277 *strp += 2;
278 *valuep = 0;
279 }
280 else
281 errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
282
283 return errmsg;
284 }
285
286 static const char *
287 parse_rc (CGEN_CPU_DESC cd,
288 const char **strp,
289 int opindex,
290 unsigned long *valuep)
291 {
292 const char *errmsg = NULL;
293
294 if (strncmp (*strp, "r", 1) == 0 || strncmp (*strp, "R", 1) == 0)
295 {
296 *strp += 1;
297 *valuep = 1;
298 }
299 else if (strncmp (*strp, "c", 1) == 0 || strncmp (*strp, "C", 1) == 0)
300 {
301 *strp += 1;
302 *valuep = 0;
303 }
304 else
305 errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
306
307 return errmsg;
308 }
309
310 static const char *
311 parse_cbrb (CGEN_CPU_DESC cd,
312 const char **strp,
313 int opindex,
314 unsigned long *valuep)
315 {
316 const char *errmsg = NULL;
317
318 if (strncmp (*strp, "rb", 2) == 0 || strncmp (*strp, "RB", 2) == 0)
319 {
320 *strp += 2;
321 *valuep = 1;
322 }
323 else if (strncmp (*strp, "cb", 2) == 0 || strncmp (*strp, "CB", 2) == 0)
324 {
325 *strp += 2;
326 *valuep = 0;
327 }
328 else
329 errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
330
331 return errmsg;
332 }
333
334 static const char *
335 parse_rbbc (CGEN_CPU_DESC cd,
336 const char **strp,
337 int opindex,
338 unsigned long *valuep)
339 {
340 const char *errmsg = NULL;
341
342 if (strncmp (*strp, "rt", 2) == 0 || strncmp (*strp, "RT", 2) == 0)
343 {
344 *strp += 2;
345 *valuep = 0;
346 }
347 else if (strncmp (*strp, "br1", 3) == 0 || strncmp (*strp, "BR1", 3) == 0)
348 {
349 *strp += 3;
350 *valuep = 1;
351 }
352 else if (strncmp (*strp, "br2", 3) == 0 || strncmp (*strp, "BR2", 3) == 0)
353 {
354 *strp += 3;
355 *valuep = 2;
356 }
357 else if (strncmp (*strp, "cs", 2) == 0 || strncmp (*strp, "CS", 2) == 0)
358 {
359 *strp += 2;
360 *valuep = 3;
361 }
362 else
363 errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
364
365 return errmsg;
366 }
367
368 static const char *
369 parse_type (CGEN_CPU_DESC cd,
370 const char **strp,
371 int opindex,
372 unsigned long *valuep)
373 {
374 const char *errmsg = NULL;
375
376 if (strncmp (*strp, "odd", 3) == 0 || strncmp (*strp, "ODD", 3) == 0)
377 {
378 *strp += 3;
379 *valuep = 0;
380 }
381 else if (strncmp (*strp, "even", 4) == 0 || strncmp (*strp, "EVEN", 4) == 0)
382 {
383 *strp += 4;
384 *valuep = 1;
385 }
386 else if (strncmp (*strp, "oe", 2) == 0 || strncmp (*strp, "OE", 2) == 0)
387 {
388 *strp += 2;
389 *valuep = 2;
390 }
391 else
392 errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
393
394 if ((errmsg == NULL) && (*valuep == 3))
395 errmsg = _("invalid operand. type may have values 0,1,2 only.");
396
397 return errmsg;
398 }
399
400 /* -- dis.c */
401
402 const char * mt_cgen_parse_operand
403 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
404
405 /* Main entry point for operand parsing.
406
407 This function is basically just a big switch statement. Earlier versions
408 used tables to look up the function to use, but
409 - if the table contains both assembler and disassembler functions then
410 the disassembler contains much of the assembler and vice-versa,
411 - there's a lot of inlining possibilities as things grow,
412 - using a switch statement avoids the function call overhead.
413
414 This function could be moved into `parse_insn_normal', but keeping it
415 separate makes clear the interface between `parse_insn_normal' and each of
416 the handlers. */
417
418 const char *
419 mt_cgen_parse_operand (CGEN_CPU_DESC cd,
420 int opindex,
421 const char ** strp,
422 CGEN_FIELDS * fields)
423 {
424 const char * errmsg = NULL;
425 /* Used by scalar operands that still need to be parsed. */
426 long junk ATTRIBUTE_UNUSED;
427
428 switch (opindex)
429 {
430 case MT_OPERAND_A23 :
431 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_A23, (unsigned long *) (& fields->f_a23));
432 break;
433 case MT_OPERAND_BALL :
434 errmsg = parse_ball (cd, strp, MT_OPERAND_BALL, (unsigned long *) (& fields->f_ball));
435 break;
436 case MT_OPERAND_BALL2 :
437 errmsg = parse_ball (cd, strp, MT_OPERAND_BALL2, (unsigned long *) (& fields->f_ball2));
438 break;
439 case MT_OPERAND_BANKADDR :
440 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_BANKADDR, (unsigned long *) (& fields->f_bankaddr));
441 break;
442 case MT_OPERAND_BRC :
443 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_BRC, (unsigned long *) (& fields->f_brc));
444 break;
445 case MT_OPERAND_BRC2 :
446 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_BRC2, (unsigned long *) (& fields->f_brc2));
447 break;
448 case MT_OPERAND_CB1INCR :
449 errmsg = cgen_parse_signed_integer (cd, strp, MT_OPERAND_CB1INCR, (long *) (& fields->f_cb1incr));
450 break;
451 case MT_OPERAND_CB1SEL :
452 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CB1SEL, (unsigned long *) (& fields->f_cb1sel));
453 break;
454 case MT_OPERAND_CB2INCR :
455 errmsg = cgen_parse_signed_integer (cd, strp, MT_OPERAND_CB2INCR, (long *) (& fields->f_cb2incr));
456 break;
457 case MT_OPERAND_CB2SEL :
458 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CB2SEL, (unsigned long *) (& fields->f_cb2sel));
459 break;
460 case MT_OPERAND_CBRB :
461 errmsg = parse_cbrb (cd, strp, MT_OPERAND_CBRB, (unsigned long *) (& fields->f_cbrb));
462 break;
463 case MT_OPERAND_CBS :
464 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CBS, (unsigned long *) (& fields->f_cbs));
465 break;
466 case MT_OPERAND_CBX :
467 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CBX, (unsigned long *) (& fields->f_cbx));
468 break;
469 case MT_OPERAND_CCB :
470 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CCB, (unsigned long *) (& fields->f_ccb));
471 break;
472 case MT_OPERAND_CDB :
473 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CDB, (unsigned long *) (& fields->f_cdb));
474 break;
475 case MT_OPERAND_CELL :
476 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CELL, (unsigned long *) (& fields->f_cell));
477 break;
478 case MT_OPERAND_COLNUM :
479 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_COLNUM, (unsigned long *) (& fields->f_colnum));
480 break;
481 case MT_OPERAND_CONTNUM :
482 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CONTNUM, (unsigned long *) (& fields->f_contnum));
483 break;
484 case MT_OPERAND_CR :
485 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CR, (unsigned long *) (& fields->f_cr));
486 break;
487 case MT_OPERAND_CTXDISP :
488 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_CTXDISP, (unsigned long *) (& fields->f_ctxdisp));
489 break;
490 case MT_OPERAND_DUP :
491 errmsg = parse_dup (cd, strp, MT_OPERAND_DUP, (unsigned long *) (& fields->f_dup));
492 break;
493 case MT_OPERAND_FBDISP :
494 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_FBDISP, (unsigned long *) (& fields->f_fbdisp));
495 break;
496 case MT_OPERAND_FBINCR :
497 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_FBINCR, (unsigned long *) (& fields->f_fbincr));
498 break;
499 case MT_OPERAND_FRDR :
500 errmsg = cgen_parse_keyword (cd, strp, & mt_cgen_opval_h_spr, & fields->f_dr);
501 break;
502 case MT_OPERAND_FRDRRR :
503 errmsg = cgen_parse_keyword (cd, strp, & mt_cgen_opval_h_spr, & fields->f_drrr);
504 break;
505 case MT_OPERAND_FRSR1 :
506 errmsg = cgen_parse_keyword (cd, strp, & mt_cgen_opval_h_spr, & fields->f_sr1);
507 break;
508 case MT_OPERAND_FRSR2 :
509 errmsg = cgen_parse_keyword (cd, strp, & mt_cgen_opval_h_spr, & fields->f_sr2);
510 break;
511 case MT_OPERAND_ID :
512 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_ID, (unsigned long *) (& fields->f_id));
513 break;
514 case MT_OPERAND_IMM16 :
515 errmsg = parse_imm16 (cd, strp, MT_OPERAND_IMM16, (long *) (& fields->f_imm16s));
516 break;
517 case MT_OPERAND_IMM16L :
518 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_IMM16L, (unsigned long *) (& fields->f_imm16l));
519 break;
520 case MT_OPERAND_IMM16O :
521 errmsg = parse_imm16 (cd, strp, MT_OPERAND_IMM16O, (unsigned long *) (& fields->f_imm16s));
522 break;
523 case MT_OPERAND_IMM16Z :
524 errmsg = parse_imm16 (cd, strp, MT_OPERAND_IMM16Z, (unsigned long *) (& fields->f_imm16u));
525 break;
526 case MT_OPERAND_INCAMT :
527 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_INCAMT, (unsigned long *) (& fields->f_incamt));
528 break;
529 case MT_OPERAND_INCR :
530 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_INCR, (unsigned long *) (& fields->f_incr));
531 break;
532 case MT_OPERAND_LENGTH :
533 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_LENGTH, (unsigned long *) (& fields->f_length));
534 break;
535 case MT_OPERAND_LOOPSIZE :
536 errmsg = parse_loopsize (cd, strp, MT_OPERAND_LOOPSIZE, (unsigned long *) (& fields->f_loopo));
537 break;
538 case MT_OPERAND_MASK :
539 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_MASK, (unsigned long *) (& fields->f_mask));
540 break;
541 case MT_OPERAND_MASK1 :
542 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_MASK1, (unsigned long *) (& fields->f_mask1));
543 break;
544 case MT_OPERAND_MODE :
545 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_MODE, (unsigned long *) (& fields->f_mode));
546 break;
547 case MT_OPERAND_PERM :
548 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_PERM, (unsigned long *) (& fields->f_perm));
549 break;
550 case MT_OPERAND_RBBC :
551 errmsg = parse_rbbc (cd, strp, MT_OPERAND_RBBC, (unsigned long *) (& fields->f_rbbc));
552 break;
553 case MT_OPERAND_RC :
554 errmsg = parse_rc (cd, strp, MT_OPERAND_RC, (unsigned long *) (& fields->f_rc));
555 break;
556 case MT_OPERAND_RC1 :
557 errmsg = parse_rc (cd, strp, MT_OPERAND_RC1, (unsigned long *) (& fields->f_rc1));
558 break;
559 case MT_OPERAND_RC2 :
560 errmsg = parse_rc (cd, strp, MT_OPERAND_RC2, (unsigned long *) (& fields->f_rc2));
561 break;
562 case MT_OPERAND_RC3 :
563 errmsg = parse_rc (cd, strp, MT_OPERAND_RC3, (unsigned long *) (& fields->f_rc3));
564 break;
565 case MT_OPERAND_RCNUM :
566 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_RCNUM, (unsigned long *) (& fields->f_rcnum));
567 break;
568 case MT_OPERAND_RDA :
569 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_RDA, (unsigned long *) (& fields->f_rda));
570 break;
571 case MT_OPERAND_ROWNUM :
572 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_ROWNUM, (unsigned long *) (& fields->f_rownum));
573 break;
574 case MT_OPERAND_ROWNUM1 :
575 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_ROWNUM1, (unsigned long *) (& fields->f_rownum1));
576 break;
577 case MT_OPERAND_ROWNUM2 :
578 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_ROWNUM2, (unsigned long *) (& fields->f_rownum2));
579 break;
580 case MT_OPERAND_SIZE :
581 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_SIZE, (unsigned long *) (& fields->f_size));
582 break;
583 case MT_OPERAND_TYPE :
584 errmsg = parse_type (cd, strp, MT_OPERAND_TYPE, (unsigned long *) (& fields->f_type));
585 break;
586 case MT_OPERAND_WR :
587 errmsg = cgen_parse_unsigned_integer (cd, strp, MT_OPERAND_WR, (unsigned long *) (& fields->f_wr));
588 break;
589 case MT_OPERAND_XMODE :
590 errmsg = parse_xmode (cd, strp, MT_OPERAND_XMODE, (unsigned long *) (& fields->f_xmode));
591 break;
592
593 default :
594 /* xgettext:c-format */
595 opcodes_error_handler
596 (_("internal error: unrecognized field %d while parsing"),
597 opindex);
598 abort ();
599 }
600
601 return errmsg;
602 }
603
604 cgen_parse_fn * const mt_cgen_parse_handlers[] =
605 {
606 parse_insn_normal,
607 };
608
609 void
610 mt_cgen_init_asm (CGEN_CPU_DESC cd)
611 {
612 mt_cgen_init_opcode_table (cd);
613 mt_cgen_init_ibld_table (cd);
614 cd->parse_handlers = & mt_cgen_parse_handlers[0];
615 cd->parse_operand = mt_cgen_parse_operand;
616 #ifdef CGEN_ASM_INIT_HOOK
617 CGEN_ASM_INIT_HOOK
618 #endif
619 }
620
621
622
623 /* Regex construction routine.
624
625 This translates an opcode syntax string into a regex string,
626 by replacing any non-character syntax element (such as an
627 opcode) with the pattern '.*'
628
629 It then compiles the regex and stores it in the opcode, for
630 later use by mt_cgen_assemble_insn
631
632 Returns NULL for success, an error message for failure. */
633
634 char *
635 mt_cgen_build_insn_regex (CGEN_INSN *insn)
636 {
637 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
638 const char *mnem = CGEN_INSN_MNEMONIC (insn);
639 char rxbuf[CGEN_MAX_RX_ELEMENTS];
640 char *rx = rxbuf;
641 const CGEN_SYNTAX_CHAR_TYPE *syn;
642 int reg_err;
643
644 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
645
646 /* Mnemonics come first in the syntax string. */
647 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
648 return _("missing mnemonic in syntax string");
649 ++syn;
650
651 /* Generate a case sensitive regular expression that emulates case
652 insensitive matching in the "C" locale. We cannot generate a case
653 insensitive regular expression because in Turkish locales, 'i' and 'I'
654 are not equal modulo case conversion. */
655
656 /* Copy the literal mnemonic out of the insn. */
657 for (; *mnem; mnem++)
658 {
659 char c = *mnem;
660
661 if (ISALPHA (c))
662 {
663 *rx++ = '[';
664 *rx++ = TOLOWER (c);
665 *rx++ = TOUPPER (c);
666 *rx++ = ']';
667 }
668 else
669 *rx++ = c;
670 }
671
672 /* Copy any remaining literals from the syntax string into the rx. */
673 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
674 {
675 if (CGEN_SYNTAX_CHAR_P (* syn))
676 {
677 char c = CGEN_SYNTAX_CHAR (* syn);
678
679 switch (c)
680 {
681 /* Escape any regex metacharacters in the syntax. */
682 case '.': case '[': case '\\':
683 case '*': case '^': case '$':
684
685 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
686 case '?': case '{': case '}':
687 case '(': case ')': case '*':
688 case '|': case '+': case ']':
689 #endif
690 *rx++ = '\\';
691 *rx++ = c;
692 break;
693
694 default:
695 if (ISALPHA (c))
696 {
697 *rx++ = '[';
698 *rx++ = TOLOWER (c);
699 *rx++ = TOUPPER (c);
700 *rx++ = ']';
701 }
702 else
703 *rx++ = c;
704 break;
705 }
706 }
707 else
708 {
709 /* Replace non-syntax fields with globs. */
710 *rx++ = '.';
711 *rx++ = '*';
712 }
713 }
714
715 /* Trailing whitespace ok. */
716 * rx++ = '[';
717 * rx++ = ' ';
718 * rx++ = '\t';
719 * rx++ = ']';
720 * rx++ = '*';
721
722 /* But anchor it after that. */
723 * rx++ = '$';
724 * rx = '\0';
725
726 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
727 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
728
729 if (reg_err == 0)
730 return NULL;
731 else
732 {
733 static char msg[80];
734
735 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
736 regfree ((regex_t *) CGEN_INSN_RX (insn));
737 free (CGEN_INSN_RX (insn));
738 (CGEN_INSN_RX (insn)) = NULL;
739 return msg;
740 }
741 }
742
743
744 /* Default insn parser.
745
746 The syntax string is scanned and operands are parsed and stored in FIELDS.
747 Relocs are queued as we go via other callbacks.
748
749 ??? Note that this is currently an all-or-nothing parser. If we fail to
750 parse the instruction, we return 0 and the caller will start over from
751 the beginning. Backtracking will be necessary in parsing subexpressions,
752 but that can be handled there. Not handling backtracking here may get
753 expensive in the case of the m68k. Deal with later.
754
755 Returns NULL for success, an error message for failure. */
756
757 static const char *
758 parse_insn_normal (CGEN_CPU_DESC cd,
759 const CGEN_INSN *insn,
760 const char **strp,
761 CGEN_FIELDS *fields)
762 {
763 /* ??? Runtime added insns not handled yet. */
764 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
765 const char *str = *strp;
766 const char *errmsg;
767 const char *p;
768 const CGEN_SYNTAX_CHAR_TYPE * syn;
769 #ifdef CGEN_MNEMONIC_OPERANDS
770 /* FIXME: wip */
771 int past_opcode_p;
772 #endif
773
774 /* For now we assume the mnemonic is first (there are no leading operands).
775 We can parse it without needing to set up operand parsing.
776 GAS's input scrubber will ensure mnemonics are lowercase, but we may
777 not be called from GAS. */
778 p = CGEN_INSN_MNEMONIC (insn);
779 while (*p && TOLOWER (*p) == TOLOWER (*str))
780 ++p, ++str;
781
782 if (* p)
783 return _("unrecognized instruction");
784
785 #ifndef CGEN_MNEMONIC_OPERANDS
786 if (* str && ! ISSPACE (* str))
787 return _("unrecognized instruction");
788 #endif
789
790 CGEN_INIT_PARSE (cd);
791 cgen_init_parse_operand (cd);
792 #ifdef CGEN_MNEMONIC_OPERANDS
793 past_opcode_p = 0;
794 #endif
795
796 /* We don't check for (*str != '\0') here because we want to parse
797 any trailing fake arguments in the syntax string. */
798 syn = CGEN_SYNTAX_STRING (syntax);
799
800 /* Mnemonics come first for now, ensure valid string. */
801 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
802 abort ();
803
804 ++syn;
805
806 while (* syn != 0)
807 {
808 /* Non operand chars must match exactly. */
809 if (CGEN_SYNTAX_CHAR_P (* syn))
810 {
811 /* FIXME: While we allow for non-GAS callers above, we assume the
812 first char after the mnemonic part is a space. */
813 /* FIXME: We also take inappropriate advantage of the fact that
814 GAS's input scrubber will remove extraneous blanks. */
815 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
816 {
817 #ifdef CGEN_MNEMONIC_OPERANDS
818 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
819 past_opcode_p = 1;
820 #endif
821 ++ syn;
822 ++ str;
823 }
824 else if (*str)
825 {
826 /* Syntax char didn't match. Can't be this insn. */
827 static char msg [80];
828
829 /* xgettext:c-format */
830 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
831 CGEN_SYNTAX_CHAR(*syn), *str);
832 return msg;
833 }
834 else
835 {
836 /* Ran out of input. */
837 static char msg [80];
838
839 /* xgettext:c-format */
840 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
841 CGEN_SYNTAX_CHAR(*syn));
842 return msg;
843 }
844 continue;
845 }
846
847 #ifdef CGEN_MNEMONIC_OPERANDS
848 (void) past_opcode_p;
849 #endif
850 /* We have an operand of some sort. */
851 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields);
852 if (errmsg)
853 return errmsg;
854
855 /* Done with this operand, continue with next one. */
856 ++ syn;
857 }
858
859 /* If we're at the end of the syntax string, we're done. */
860 if (* syn == 0)
861 {
862 /* FIXME: For the moment we assume a valid `str' can only contain
863 blanks now. IE: We needn't try again with a longer version of
864 the insn and it is assumed that longer versions of insns appear
865 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
866 while (ISSPACE (* str))
867 ++ str;
868
869 if (* str != '\0')
870 return _("junk at end of line"); /* FIXME: would like to include `str' */
871
872 return NULL;
873 }
874
875 /* We couldn't parse it. */
876 return _("unrecognized instruction");
877 }
878
879 /* Main entry point.
880 This routine is called for each instruction to be assembled.
881 STR points to the insn to be assembled.
882 We assume all necessary tables have been initialized.
883 The assembled instruction, less any fixups, is stored in BUF.
884 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
885 still needs to be converted to target byte order, otherwise BUF is an array
886 of bytes in target byte order.
887 The result is a pointer to the insn's entry in the opcode table,
888 or NULL if an error occured (an error message will have already been
889 printed).
890
891 Note that when processing (non-alias) macro-insns,
892 this function recurses.
893
894 ??? It's possible to make this cpu-independent.
895 One would have to deal with a few minor things.
896 At this point in time doing so would be more of a curiosity than useful
897 [for example this file isn't _that_ big], but keeping the possibility in
898 mind helps keep the design clean. */
899
900 const CGEN_INSN *
901 mt_cgen_assemble_insn (CGEN_CPU_DESC cd,
902 const char *str,
903 CGEN_FIELDS *fields,
904 CGEN_INSN_BYTES_PTR buf,
905 char **errmsg)
906 {
907 const char *start;
908 CGEN_INSN_LIST *ilist;
909 const char *parse_errmsg = NULL;
910 const char *insert_errmsg = NULL;
911 int recognized_mnemonic = 0;
912
913 /* Skip leading white space. */
914 while (ISSPACE (* str))
915 ++ str;
916
917 /* The instructions are stored in hashed lists.
918 Get the first in the list. */
919 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
920
921 /* Keep looking until we find a match. */
922 start = str;
923 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
924 {
925 const CGEN_INSN *insn = ilist->insn;
926 recognized_mnemonic = 1;
927
928 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
929 /* Not usually needed as unsupported opcodes
930 shouldn't be in the hash lists. */
931 /* Is this insn supported by the selected cpu? */
932 if (! mt_cgen_insn_supported (cd, insn))
933 continue;
934 #endif
935 /* If the RELAXED attribute is set, this is an insn that shouldn't be
936 chosen immediately. Instead, it is used during assembler/linker
937 relaxation if possible. */
938 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
939 continue;
940
941 str = start;
942
943 /* Skip this insn if str doesn't look right lexically. */
944 if (CGEN_INSN_RX (insn) != NULL &&
945 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
946 continue;
947
948 /* Allow parse/insert handlers to obtain length of insn. */
949 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
950
951 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
952 if (parse_errmsg != NULL)
953 continue;
954
955 /* ??? 0 is passed for `pc'. */
956 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
957 (bfd_vma) 0);
958 if (insert_errmsg != NULL)
959 continue;
960
961 /* It is up to the caller to actually output the insn and any
962 queued relocs. */
963 return insn;
964 }
965
966 {
967 static char errbuf[150];
968 const char *tmp_errmsg;
969 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
970 #define be_verbose 1
971 #else
972 #define be_verbose 0
973 #endif
974
975 if (be_verbose)
976 {
977 /* If requesting verbose error messages, use insert_errmsg.
978 Failing that, use parse_errmsg. */
979 tmp_errmsg = (insert_errmsg ? insert_errmsg :
980 parse_errmsg ? parse_errmsg :
981 recognized_mnemonic ?
982 _("unrecognized form of instruction") :
983 _("unrecognized instruction"));
984
985 if (strlen (start) > 50)
986 /* xgettext:c-format */
987 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
988 else
989 /* xgettext:c-format */
990 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
991 }
992 else
993 {
994 if (strlen (start) > 50)
995 /* xgettext:c-format */
996 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
997 else
998 /* xgettext:c-format */
999 sprintf (errbuf, _("bad instruction `%.50s'"), start);
1000 }
1001
1002 *errmsg = errbuf;
1003 return NULL;
1004 }
1005 }