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d70c5fc7
NC		 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, 2005
8 Free Software Foundation, Inc.
9
10 This file is part of the GNU Binutils and GDB, the GNU debugger.
11
12 This program 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 2, or (at your option)
15 any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public 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/* ??? Eventually more and more of this stuff can go to cpu-independent files.
27 Keep that in mind. */
28
29#include "sysdep.h"
30#include <stdio.h>
31#include "ansidecl.h"
32#include "bfd.h"
33#include "symcat.h"
34#include "xc16x-desc.h"
35#include "xc16x-opc.h"
36#include "opintl.h"
37#include "xregex.h"
38#include "libiberty.h"
39#include "safe-ctype.h"
40
41#undef min
42#define min(a,b) ((a) < (b) ? (a) : (b))
43#undef max
44#define max(a,b) ((a) > (b) ? (a) : (b))
45
46static const char * parse_insn_normal
47 (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *);
48\f
49/* -- assembler routines inserted here. */
50
51/* -- asm.c */
52/* Handle '#' prefixes (i.e. skip over them). */
53
54static const char *
55parse_hash (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
56 const char **strp,
57 int opindex ATTRIBUTE_UNUSED,
58 long *valuep ATTRIBUTE_UNUSED)
59{
60 if (**strp == '#')
61 ++*strp;
62 return NULL;
63}
64
65/* Handle '.' prefixes (i.e. skip over them). */
66
67static const char *
68parse_dot (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
69 const char **strp,
70 int opindex ATTRIBUTE_UNUSED,
71 long *valuep ATTRIBUTE_UNUSED)
72{
73 if (**strp == '.')
74 ++*strp;
75 return NULL;
76}
77
78/* Handle '.' prefixes (i.e. skip over them). */
79
80static const char *
81parse_pof (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
82 const char **strp,
83 int opindex ATTRIBUTE_UNUSED,
84 long *valuep ATTRIBUTE_UNUSED)
85{
86 if (!strncasecmp (*strp, "pof:", 4))
87 *strp += 4;
88 return NULL;
89}
90
91/* Handle '.' prefixes (i.e. skip over them). */
92
93static const char *
94parse_pag (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
95 const char **strp,
96 int opindex ATTRIBUTE_UNUSED,
97 long *valuep ATTRIBUTE_UNUSED)
98{
99 if (!strncasecmp (*strp, "pag:", 4))
100 *strp += 4;
101 return NULL;
102}
103
104/* Handle 'sof' prefixes (i.e. skip over them). */
105static const char *
106parse_sof (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
107 const char **strp,
108 int opindex ATTRIBUTE_UNUSED,
109 long *valuep ATTRIBUTE_UNUSED)
110{
111 if (!strncasecmp (*strp, "sof:", 4))
112 *strp += 4;
113 return NULL;
114}
115
116/* Handle 'seg' prefixes (i.e. skip over them). */
117static const char *
118parse_seg (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
119 const char **strp,
120 int opindex ATTRIBUTE_UNUSED,
121 long *valuep ATTRIBUTE_UNUSED)
122{
123 if (!strncasecmp (*strp, "seg:", 4))
124 *strp += 4;
125 return NULL;
126}
127/* -- */
128
129const char * xc16x_cgen_parse_operand
130 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
131
132/* Main entry point for operand parsing.
133
134 This function is basically just a big switch statement. Earlier versions
135 used tables to look up the function to use, but
136 - if the table contains both assembler and disassembler functions then
137 the disassembler contains much of the assembler and vice-versa,
138 - there's a lot of inlining possibilities as things grow,
139 - using a switch statement avoids the function call overhead.
140
141 This function could be moved into `parse_insn_normal', but keeping it
142 separate makes clear the interface between `parse_insn_normal' and each of
143 the handlers. */
144
145const char *
146xc16x_cgen_parse_operand (CGEN_CPU_DESC cd,
147 int opindex,
148 const char ** strp,
149 CGEN_FIELDS * fields)
150{
151 const char * errmsg = NULL;
152 /* Used by scalar operands that still need to be parsed. */
153 long junk ATTRIBUTE_UNUSED;
154
155 switch (opindex)
156 {
157 case XC16X_OPERAND_REGNAM :
158 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_psw_names, & fields->f_reg8);
159 break;
160 case XC16X_OPERAND_BIT01 :
161 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_BIT01, (unsigned long *) (& fields->f_op_1bit));
162 break;
163 case XC16X_OPERAND_BIT1 :
164 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_BIT1, (unsigned long *) (& fields->f_op_bit1));
165 break;
166 case XC16X_OPERAND_BIT2 :
167 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_BIT2, (unsigned long *) (& fields->f_op_bit2));
168 break;
169 case XC16X_OPERAND_BIT4 :
170 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_BIT4, (unsigned long *) (& fields->f_op_bit4));
171 break;
172 case XC16X_OPERAND_BIT8 :
173 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_BIT8, (unsigned long *) (& fields->f_op_bit8));
174 break;
175 case XC16X_OPERAND_BITONE :
176 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_BITONE, (unsigned long *) (& fields->f_op_onebit));
177 break;
178 case XC16X_OPERAND_CADDR :
179 {
180 bfd_vma value = 0;
181 errmsg = cgen_parse_address (cd, strp, XC16X_OPERAND_CADDR, 0, NULL, & value);
182 fields->f_offset16 = value;
183 }
184 break;
185 case XC16X_OPERAND_COND :
186 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_conditioncode_names, & fields->f_condcode);
187 break;
188 case XC16X_OPERAND_DATA8 :
189 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_DATA8, (unsigned long *) (& fields->f_data8));
190 break;
191 case XC16X_OPERAND_DATAHI8 :
192 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_DATAHI8, (unsigned long *) (& fields->f_datahi8));
193 break;
194 case XC16X_OPERAND_DOT :
195 errmsg = parse_dot (cd, strp, XC16X_OPERAND_DOT, (long *) (& junk));
196 break;
197 case XC16X_OPERAND_DR :
198 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_gr_names, & fields->f_r1);
199 break;
200 case XC16X_OPERAND_DRB :
201 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_grb_names, & fields->f_r1);
202 break;
203 case XC16X_OPERAND_DRI :
204 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_gr_names, & fields->f_r4);
205 break;
206 case XC16X_OPERAND_EXTCOND :
207 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_extconditioncode_names, & fields->f_extccode);
208 break;
209 case XC16X_OPERAND_GENREG :
210 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_r8_names, & fields->f_regb8);
211 break;
212 case XC16X_OPERAND_HASH :
213 errmsg = parse_hash (cd, strp, XC16X_OPERAND_HASH, (long *) (& junk));
214 break;
215 case XC16X_OPERAND_ICOND :
216 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_conditioncode_names, & fields->f_icondcode);
217 break;
218 case XC16X_OPERAND_LBIT2 :
219 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_LBIT2, (unsigned long *) (& fields->f_op_lbit2));
220 break;
221 case XC16X_OPERAND_LBIT4 :
222 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_LBIT4, (unsigned long *) (& fields->f_op_lbit4));
223 break;
224 case XC16X_OPERAND_MASK8 :
225 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_MASK8, (unsigned long *) (& fields->f_mask8));
226 break;
227 case XC16X_OPERAND_MASKLO8 :
228 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_MASKLO8, (unsigned long *) (& fields->f_datahi8));
229 break;
230 case XC16X_OPERAND_MEMGR8 :
231 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_memgr8_names, & fields->f_memgr8);
232 break;
233 case XC16X_OPERAND_MEMORY :
234 {
235 bfd_vma value = 0;
236 errmsg = cgen_parse_address (cd, strp, XC16X_OPERAND_MEMORY, 0, NULL, & value);
237 fields->f_memory = value;
238 }
239 break;
240 case XC16X_OPERAND_PAG :
241 errmsg = parse_pag (cd, strp, XC16X_OPERAND_PAG, (long *) (& junk));
242 break;
243 case XC16X_OPERAND_PAGENUM :
244 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_PAGENUM, (unsigned long *) (& fields->f_pagenum));
245 break;
246 case XC16X_OPERAND_POF :
247 errmsg = parse_pof (cd, strp, XC16X_OPERAND_POF, (long *) (& junk));
248 break;
249 case XC16X_OPERAND_QBIT :
250 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_QBIT, (unsigned long *) (& fields->f_qbit));
251 break;
252 case XC16X_OPERAND_QHIBIT :
253 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_QHIBIT, (unsigned long *) (& fields->f_qhibit));
254 break;
255 case XC16X_OPERAND_QLOBIT :
256 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_QLOBIT, (unsigned long *) (& fields->f_qlobit));
257 break;
258 case XC16X_OPERAND_REG8 :
259 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_r8_names, & fields->f_reg8);
260 break;
261 case XC16X_OPERAND_REGB8 :
262 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_grb8_names, & fields->f_regb8);
263 break;
264 case XC16X_OPERAND_REGBMEM8 :
265 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_regbmem8_names, & fields->f_regmem8);
266 break;
267 case XC16X_OPERAND_REGHI8 :
268 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_r8_names, & fields->f_reghi8);
269 break;
270 case XC16X_OPERAND_REGMEM8 :
271 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_regmem8_names, & fields->f_regmem8);
272 break;
273 case XC16X_OPERAND_REGOFF8 :
274 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_r8_names, & fields->f_regoff8);
275 break;
276 case XC16X_OPERAND_REL :
277 errmsg = cgen_parse_signed_integer (cd, strp, XC16X_OPERAND_REL, (long *) (& fields->f_rel8));
278 break;
279 case XC16X_OPERAND_RELHI :
280 errmsg = cgen_parse_signed_integer (cd, strp, XC16X_OPERAND_RELHI, (long *) (& fields->f_relhi8));
281 break;
282 case XC16X_OPERAND_SEG :
283 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_SEG, (unsigned long *) (& fields->f_seg8));
284 break;
285 case XC16X_OPERAND_SEGHI8 :
286 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_SEGHI8, (unsigned long *) (& fields->f_segnum8));
287 break;
288 case XC16X_OPERAND_SEGM :
289 errmsg = parse_seg (cd, strp, XC16X_OPERAND_SEGM, (long *) (& junk));
290 break;
291 case XC16X_OPERAND_SOF :
292 errmsg = parse_sof (cd, strp, XC16X_OPERAND_SOF, (long *) (& junk));
293 break;
294 case XC16X_OPERAND_SR :
295 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_gr_names, & fields->f_r2);
296 break;
297 case XC16X_OPERAND_SR2 :
298 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_gr_names, & fields->f_r0);
299 break;
300 case XC16X_OPERAND_SRB :
301 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_grb_names, & fields->f_r2);
302 break;
303 case XC16X_OPERAND_SRC1 :
304 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_gr_names, & fields->f_r1);
305 break;
306 case XC16X_OPERAND_SRC2 :
307 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_gr_names, & fields->f_r2);
308 break;
309 case XC16X_OPERAND_SRDIV :
310 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_regdiv8_names, & fields->f_reg8);
311 break;
312 case XC16X_OPERAND_U4 :
313 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_reg0_name, & fields->f_uimm4);
314 break;
315 case XC16X_OPERAND_UIMM16 :
316 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_UIMM16, (unsigned long *) (& fields->f_uimm16));
317 break;
318 case XC16X_OPERAND_UIMM2 :
319 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_ext_names, & fields->f_uimm2);
320 break;
321 case XC16X_OPERAND_UIMM3 :
322 errmsg = cgen_parse_keyword (cd, strp, & xc16x_cgen_opval_reg0_name1, & fields->f_uimm3);
323 break;
324 case XC16X_OPERAND_UIMM4 :
325 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_UIMM4, (unsigned long *) (& fields->f_uimm4));
326 break;
327 case XC16X_OPERAND_UIMM7 :
328 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_UIMM7, (unsigned long *) (& fields->f_uimm7));
329 break;
330 case XC16X_OPERAND_UIMM8 :
331 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_UIMM8, (unsigned long *) (& fields->f_uimm8));
332 break;
333 case XC16X_OPERAND_UPAG16 :
334 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_UPAG16, (unsigned long *) (& fields->f_uimm16));
335 break;
336 case XC16X_OPERAND_UPOF16 :
337 {
338 bfd_vma value = 0;
339 errmsg = cgen_parse_address (cd, strp, XC16X_OPERAND_UPOF16, 0, NULL, & value);
340 fields->f_memory = value;
341 }
342 break;
343 case XC16X_OPERAND_USEG16 :
344 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_USEG16, (unsigned long *) (& fields->f_offset16));
345 break;
346 case XC16X_OPERAND_USEG8 :
347 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_USEG8, (unsigned long *) (& fields->f_seg8));
348 break;
349 case XC16X_OPERAND_USOF16 :
350 errmsg = cgen_parse_unsigned_integer (cd, strp, XC16X_OPERAND_USOF16, (unsigned long *) (& fields->f_offset16));
351 break;
352
353 default :
354 /* xgettext:c-format */
355 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
356 abort ();
357 }
358
359 return errmsg;
360}
361
362cgen_parse_fn * const xc16x_cgen_parse_handlers[] =
363{
364 parse_insn_normal,
365};
366
367void
368xc16x_cgen_init_asm (CGEN_CPU_DESC cd)
369{
370 xc16x_cgen_init_opcode_table (cd);
371 xc16x_cgen_init_ibld_table (cd);
372 cd->parse_handlers = & xc16x_cgen_parse_handlers[0];
373 cd->parse_operand = xc16x_cgen_parse_operand;
374}
375
376\f
377
378/* Regex construction routine.
379
380 This translates an opcode syntax string into a regex string,
381 by replacing any non-character syntax element (such as an
382 opcode) with the pattern '.*'
383
384 It then compiles the regex and stores it in the opcode, for
385 later use by xc16x_cgen_assemble_insn
386
387 Returns NULL for success, an error message for failure. */
388
389char *
390xc16x_cgen_build_insn_regex (CGEN_INSN *insn)
391{
392 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
393 const char *mnem = CGEN_INSN_MNEMONIC (insn);
394 char rxbuf[CGEN_MAX_RX_ELEMENTS];
395 char *rx = rxbuf;
396 const CGEN_SYNTAX_CHAR_TYPE *syn;
397 int reg_err;
398
399 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
400
401 /* Mnemonics come first in the syntax string. */
402 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
403 return _("missing mnemonic in syntax string");
404 ++syn;
405
406 /* Generate a case sensitive regular expression that emulates case
407 insensitive matching in the "C" locale. We cannot generate a case
408 insensitive regular expression because in Turkish locales, 'i' and 'I'
409 are not equal modulo case conversion. */
410
411 /* Copy the literal mnemonic out of the insn. */
412 for (; *mnem; mnem++)
413 {
414 char c = *mnem;
415
416 if (ISALPHA (c))
417 {
418 *rx++ = '[';
419 *rx++ = TOLOWER (c);
420 *rx++ = TOUPPER (c);
421 *rx++ = ']';
422 }
423 else
424 *rx++ = c;
425 }
426
427 /* Copy any remaining literals from the syntax string into the rx. */
428 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
429 {
430 if (CGEN_SYNTAX_CHAR_P (* syn))
431 {
432 char c = CGEN_SYNTAX_CHAR (* syn);
433
434 switch (c)
435 {
436 /* Escape any regex metacharacters in the syntax. */
437 case '.': case '[': case '\\':
438 case '*': case '^': case '$':
439
440#ifdef CGEN_ESCAPE_EXTENDED_REGEX
441 case '?': case '{': case '}':
442 case '(': case ')': case '*':
443 case '|': case '+': case ']':
444#endif
445 *rx++ = '\\';
446 *rx++ = c;
447 break;
448
449 default:
450 if (ISALPHA (c))
451 {
452 *rx++ = '[';
453 *rx++ = TOLOWER (c);
454 *rx++ = TOUPPER (c);
455 *rx++ = ']';
456 }
457 else
458 *rx++ = c;
459 break;
460 }
461 }
462 else
463 {
464 /* Replace non-syntax fields with globs. */
465 *rx++ = '.';
466 *rx++ = '*';
467 }
468 }
469
470 /* Trailing whitespace ok. */
471 * rx++ = '[';
472 * rx++ = ' ';
473 * rx++ = '\t';
474 * rx++ = ']';
475 * rx++ = '*';
476
477 /* But anchor it after that. */
478 * rx++ = '$';
479 * rx = '\0';
480
481 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
482 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
483
484 if (reg_err == 0)
485 return NULL;
486 else
487 {
488 static char msg[80];
489
490 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
491 regfree ((regex_t *) CGEN_INSN_RX (insn));
492 free (CGEN_INSN_RX (insn));
493 (CGEN_INSN_RX (insn)) = NULL;
494 return msg;
495 }
496}
497
498\f
499/* Default insn parser.
500
501 The syntax string is scanned and operands are parsed and stored in FIELDS.
502 Relocs are queued as we go via other callbacks.
503
504 ??? Note that this is currently an all-or-nothing parser. If we fail to
505 parse the instruction, we return 0 and the caller will start over from
506 the beginning. Backtracking will be necessary in parsing subexpressions,
507 but that can be handled there. Not handling backtracking here may get
508 expensive in the case of the m68k. Deal with later.
509
510 Returns NULL for success, an error message for failure. */
511
512static const char *
513parse_insn_normal (CGEN_CPU_DESC cd,
514 const CGEN_INSN *insn,
515 const char **strp,
516 CGEN_FIELDS *fields)
517{
518 /* ??? Runtime added insns not handled yet. */
519 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
520 const char *str = *strp;
521 const char *errmsg;
522 const char *p;
523 const CGEN_SYNTAX_CHAR_TYPE * syn;
524#ifdef CGEN_MNEMONIC_OPERANDS
525 /* FIXME: wip */
526 int past_opcode_p;
527#endif
528
529 /* For now we assume the mnemonic is first (there are no leading operands).
530 We can parse it without needing to set up operand parsing.
531 GAS's input scrubber will ensure mnemonics are lowercase, but we may
532 not be called from GAS. */
533 p = CGEN_INSN_MNEMONIC (insn);
534 while (*p && TOLOWER (*p) == TOLOWER (*str))
535 ++p, ++str;
536
537 if (* p)
538 return _("unrecognized instruction");
539
540#ifndef CGEN_MNEMONIC_OPERANDS
541 if (* str && ! ISSPACE (* str))
542 return _("unrecognized instruction");
543#endif
544
545 CGEN_INIT_PARSE (cd);
546 cgen_init_parse_operand (cd);
547#ifdef CGEN_MNEMONIC_OPERANDS
548 past_opcode_p = 0;
549#endif
550
551 /* We don't check for (*str != '\0') here because we want to parse
552 any trailing fake arguments in the syntax string. */
553 syn = CGEN_SYNTAX_STRING (syntax);
554
555 /* Mnemonics come first for now, ensure valid string. */
556 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
557 abort ();
558
559 ++syn;
560
561 while (* syn != 0)
562 {
563 /* Non operand chars must match exactly. */
564 if (CGEN_SYNTAX_CHAR_P (* syn))
565 {
566 /* FIXME: While we allow for non-GAS callers above, we assume the
567 first char after the mnemonic part is a space. */
568 /* FIXME: We also take inappropriate advantage of the fact that
569 GAS's input scrubber will remove extraneous blanks. */
570 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
571 {
572#ifdef CGEN_MNEMONIC_OPERANDS
573 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
574 past_opcode_p = 1;
575#endif
576 ++ syn;
577 ++ str;
578 }
579 else if (*str)
580 {
581 /* Syntax char didn't match. Can't be this insn. */
582 static char msg [80];
583
584 /* xgettext:c-format */
585 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
586 CGEN_SYNTAX_CHAR(*syn), *str);
587 return msg;
588 }
589 else
590 {
591 /* Ran out of input. */
592 static char msg [80];
593
594 /* xgettext:c-format */
595 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
596 CGEN_SYNTAX_CHAR(*syn));
597 return msg;
598 }
599 continue;
600 }
601
602 /* We have an operand of some sort. */
603 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
604 &str, fields);
605 if (errmsg)
606 return errmsg;
607
608 /* Done with this operand, continue with next one. */
609 ++ syn;
610 }
611
612 /* If we're at the end of the syntax string, we're done. */
613 if (* syn == 0)
614 {
615 /* FIXME: For the moment we assume a valid `str' can only contain
616 blanks now. IE: We needn't try again with a longer version of
617 the insn and it is assumed that longer versions of insns appear
618 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
619 while (ISSPACE (* str))
620 ++ str;
621
622 if (* str != '\0')
623 return _("junk at end of line"); /* FIXME: would like to include `str' */
624
625 return NULL;
626 }
627
628 /* We couldn't parse it. */
629 return _("unrecognized instruction");
630}
631\f
632/* Main entry point.
633 This routine is called for each instruction to be assembled.
634 STR points to the insn to be assembled.
635 We assume all necessary tables have been initialized.
636 The assembled instruction, less any fixups, is stored in BUF.
637 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
638 still needs to be converted to target byte order, otherwise BUF is an array
639 of bytes in target byte order.
640 The result is a pointer to the insn's entry in the opcode table,
641 or NULL if an error occured (an error message will have already been
642 printed).
643
644 Note that when processing (non-alias) macro-insns,
645 this function recurses.
646
647 ??? It's possible to make this cpu-independent.
648 One would have to deal with a few minor things.
649 At this point in time doing so would be more of a curiosity than useful
650 [for example this file isn't _that_ big], but keeping the possibility in
651 mind helps keep the design clean. */
652
653const CGEN_INSN *
654xc16x_cgen_assemble_insn (CGEN_CPU_DESC cd,
655 const char *str,
656 CGEN_FIELDS *fields,
657 CGEN_INSN_BYTES_PTR buf,
658 char **errmsg)
659{
660 const char *start;
661 CGEN_INSN_LIST *ilist;
662 const char *parse_errmsg = NULL;
663 const char *insert_errmsg = NULL;
664 int recognized_mnemonic = 0;
665
666 /* Skip leading white space. */
667 while (ISSPACE (* str))
668 ++ str;
669
670 /* The instructions are stored in hashed lists.
671 Get the first in the list. */
672 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
673
674 /* Keep looking until we find a match. */
675 start = str;
676 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
677 {
678 const CGEN_INSN *insn = ilist->insn;
679 recognized_mnemonic = 1;
680
681#ifdef CGEN_VALIDATE_INSN_SUPPORTED
682 /* Not usually needed as unsupported opcodes
683 shouldn't be in the hash lists. */
684 /* Is this insn supported by the selected cpu? */
685 if (! xc16x_cgen_insn_supported (cd, insn))
686 continue;
687#endif
688 /* If the RELAXED attribute is set, this is an insn that shouldn't be
689 chosen immediately. Instead, it is used during assembler/linker
690 relaxation if possible. */
691 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
692 continue;
693
694 str = start;
695
696 /* Skip this insn if str doesn't look right lexically. */
697 if (CGEN_INSN_RX (insn) != NULL &&
698 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
699 continue;
700
701 /* Allow parse/insert handlers to obtain length of insn. */
702 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
703
704 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
705 if (parse_errmsg != NULL)
706 continue;
707
708 /* ??? 0 is passed for `pc'. */
709 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
710 (bfd_vma) 0);
711 if (insert_errmsg != NULL)
712 continue;
713
714 /* It is up to the caller to actually output the insn and any
715 queued relocs. */
716 return insn;
717 }
718
719 {
720 static char errbuf[150];
721#ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
722 const char *tmp_errmsg;
723
724 /* If requesting verbose error messages, use insert_errmsg.
725 Failing that, use parse_errmsg. */
726 tmp_errmsg = (insert_errmsg ? insert_errmsg :
727 parse_errmsg ? parse_errmsg :
728 recognized_mnemonic ?
729 _("unrecognized form of instruction") :
730 _("unrecognized instruction"));
731
732 if (strlen (start) > 50)
733 /* xgettext:c-format */
734 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
735 else
736 /* xgettext:c-format */
737 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
738#else
739 if (strlen (start) > 50)
740 /* xgettext:c-format */
741 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
742 else
743 /* xgettext:c-format */
744 sprintf (errbuf, _("bad instruction `%.50s'"), start);
745#endif
746
747 *errmsg = errbuf;
748 return NULL;
749 }
750}
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