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) 1996-2022 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 "ip2k-desc.h"
36 #include "ip2k-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
54 static const char *
parse_fr(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)55 parse_fr (CGEN_CPU_DESC cd,
56 const char **strp,
57 int opindex,
58 unsigned long *valuep)
59 {
60 const char *errmsg;
61 const char *old_strp;
62 char *afteroffset;
63 enum cgen_parse_operand_result result_type;
64 bfd_vma value;
65 extern CGEN_KEYWORD ip2k_cgen_opval_register_names;
66 bfd_vma tempvalue;
67
68 old_strp = *strp;
69 afteroffset = NULL;
70
71 /* Check here to see if you're about to try parsing a w as the first arg
72 and return an error if you are. */
73 if ((strncmp (*strp, "w", 1) == 0) || (strncmp (*strp, "W", 1) == 0))
74 {
75 (*strp)++;
76
77 if ((strncmp (*strp, ",", 1) == 0) || ISSPACE (**strp))
78 {
79 /* We've been passed a w. Return with an error message so that
80 cgen will try the next parsing option. */
81 errmsg = _("W keyword invalid in FR operand slot.");
82 return errmsg;
83 }
84 *strp = old_strp;
85 }
86
87 /* Attempt parse as register keyword. */
88 errmsg = cgen_parse_keyword (cd, strp, & ip2k_cgen_opval_register_names,
89 (long *) valuep);
90 if (*strp != NULL
91 && errmsg == NULL)
92 return errmsg;
93
94 /* Attempt to parse for "(IP)". */
95 afteroffset = strstr (*strp, "(IP)");
96
97 if (afteroffset == NULL)
98 /* Make sure it's not in lower case. */
99 afteroffset = strstr (*strp, "(ip)");
100
101 if (afteroffset != NULL)
102 {
103 if (afteroffset != *strp)
104 {
105 /* Invalid offset present. */
106 errmsg = _("offset(IP) is not a valid form");
107 return errmsg;
108 }
109 else
110 {
111 *strp += 4;
112 *valuep = 0;
113 errmsg = NULL;
114 return errmsg;
115 }
116 }
117
118 /* Attempt to parse for DP. ex: mov w, offset(DP)
119 mov offset(DP),w */
120
121 /* Try parsing it as an address and see what comes back. */
122 afteroffset = strstr (*strp, "(DP)");
123
124 if (afteroffset == NULL)
125 /* Maybe it's in lower case. */
126 afteroffset = strstr (*strp, "(dp)");
127
128 if (afteroffset != NULL)
129 {
130 if (afteroffset == *strp)
131 {
132 /* No offset present. Use 0 by default. */
133 tempvalue = 0;
134 errmsg = NULL;
135 }
136 else
137 errmsg = cgen_parse_address (cd, strp, opindex,
138 BFD_RELOC_IP2K_FR_OFFSET,
139 & result_type, & tempvalue);
140
141 if (errmsg == NULL)
142 {
143 if (tempvalue <= 127)
144 {
145 /* Value is ok. Fix up the first 2 bits and return. */
146 *valuep = 0x0100 | tempvalue;
147 *strp += 4; /* Skip over the (DP) in *strp. */
148 return errmsg;
149 }
150 else
151 {
152 /* Found something there in front of (DP) but it's out
153 of range. */
154 errmsg = _("(DP) offset out of range.");
155 return errmsg;
156 }
157 }
158 }
159
160
161 /* Attempt to parse for SP. ex: mov w, offset(SP)
162 mov offset(SP), w. */
163 afteroffset = strstr (*strp, "(SP)");
164
165 if (afteroffset == NULL)
166 /* Maybe it's in lower case. */
167 afteroffset = strstr (*strp, "(sp)");
168
169 if (afteroffset != NULL)
170 {
171 if (afteroffset == *strp)
172 {
173 /* No offset present. Use 0 by default. */
174 tempvalue = 0;
175 errmsg = NULL;
176 }
177 else
178 errmsg = cgen_parse_address (cd, strp, opindex,
179 BFD_RELOC_IP2K_FR_OFFSET,
180 & result_type, & tempvalue);
181
182 if (errmsg == NULL)
183 {
184 if (tempvalue <= 127)
185 {
186 /* Value is ok. Fix up the first 2 bits and return. */
187 *valuep = 0x0180 | tempvalue;
188 *strp += 4; /* Skip over the (SP) in *strp. */
189 return errmsg;
190 }
191 else
192 {
193 /* Found something there in front of (SP) but it's out
194 of range. */
195 errmsg = _("(SP) offset out of range.");
196 return errmsg;
197 }
198 }
199 }
200
201 /* Attempt to parse as an address. */
202 *strp = old_strp;
203 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IP2K_FR9,
204 & result_type, & value);
205 if (errmsg == NULL)
206 {
207 *valuep = value;
208
209 /* If a parenthesis is found, warn about invalid form. */
210 if (**strp == '(')
211 errmsg = _("illegal use of parentheses");
212
213 /* If a numeric value is specified, ensure that it is between
214 1 and 255. */
215 else if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
216 {
217 if (value < 0x1 || value > 0xff)
218 errmsg = _("operand out of range (not between 1 and 255)");
219 }
220 }
221 return errmsg;
222 }
223
224 static const char *
parse_addr16(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)225 parse_addr16 (CGEN_CPU_DESC cd,
226 const char **strp,
227 int opindex,
228 unsigned long *valuep)
229 {
230 const char *errmsg;
231 enum cgen_parse_operand_result result_type;
232 bfd_reloc_code_real_type code = BFD_RELOC_NONE;
233 bfd_vma value;
234
235 if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16H)
236 code = BFD_RELOC_IP2K_HI8DATA;
237 else if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16L)
238 code = BFD_RELOC_IP2K_LO8DATA;
239 else
240 {
241 /* Something is very wrong. opindex has to be one of the above. */
242 errmsg = _("parse_addr16: invalid opindex.");
243 return errmsg;
244 }
245
246 errmsg = cgen_parse_address (cd, strp, opindex, code,
247 & result_type, & value);
248 if (errmsg == NULL)
249 {
250 /* We either have a relocation or a number now. */
251 if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
252 {
253 /* We got a number back. */
254 if (code == BFD_RELOC_IP2K_HI8DATA)
255 value >>= 8;
256 else
257 /* code = BFD_RELOC_IP2K_LOW8DATA. */
258 value &= 0x00FF;
259 }
260 *valuep = value;
261 }
262
263 return errmsg;
264 }
265
266 static const char *
parse_addr16_cjp(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)267 parse_addr16_cjp (CGEN_CPU_DESC cd,
268 const char **strp,
269 int opindex,
270 unsigned long *valuep)
271 {
272 const char *errmsg;
273 enum cgen_parse_operand_result result_type;
274 bfd_reloc_code_real_type code = BFD_RELOC_NONE;
275 bfd_vma value;
276
277 if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16CJP)
278 code = BFD_RELOC_IP2K_ADDR16CJP;
279 else if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16P)
280 code = BFD_RELOC_IP2K_PAGE3;
281
282 errmsg = cgen_parse_address (cd, strp, opindex, code,
283 & result_type, & value);
284 if (errmsg == NULL)
285 {
286 if (result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
287 {
288 if ((value & 0x1) == 0) /* If the address is even .... */
289 {
290 if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16CJP)
291 *valuep = (value >> 1) & 0x1FFF; /* Should mask be 1FFF? */
292 else if (opindex == (CGEN_OPERAND_TYPE) IP2K_OPERAND_ADDR16P)
293 *valuep = (value >> 14) & 0x7;
294 }
295 else
296 errmsg = _("Byte address required. - must be even.");
297 }
298 else if (result_type == CGEN_PARSE_OPERAND_RESULT_QUEUED)
299 {
300 /* This will happen for things like (s2-s1) where s2 and s1
301 are labels. */
302 *valuep = value;
303 }
304 else
305 errmsg = _("cgen_parse_address returned a symbol. Literal required.");
306 }
307 return errmsg;
308 }
309
310 static const char *
parse_lit8(CGEN_CPU_DESC cd,const char ** strp,int opindex,long * valuep)311 parse_lit8 (CGEN_CPU_DESC cd,
312 const char **strp,
313 int opindex,
314 long *valuep)
315 {
316 const char *errmsg;
317 enum cgen_parse_operand_result result_type;
318 bfd_reloc_code_real_type code = BFD_RELOC_NONE;
319 bfd_vma value;
320
321 /* Parse %OP relocating operators. */
322 if (strncmp (*strp, "%bank", 5) == 0)
323 {
324 *strp += 5;
325 code = BFD_RELOC_IP2K_BANK;
326 }
327 else if (strncmp (*strp, "%lo8data", 8) == 0)
328 {
329 *strp += 8;
330 code = BFD_RELOC_IP2K_LO8DATA;
331 }
332 else if (strncmp (*strp, "%hi8data", 8) == 0)
333 {
334 *strp += 8;
335 code = BFD_RELOC_IP2K_HI8DATA;
336 }
337 else if (strncmp (*strp, "%ex8data", 8) == 0)
338 {
339 *strp += 8;
340 code = BFD_RELOC_IP2K_EX8DATA;
341 }
342 else if (strncmp (*strp, "%lo8insn", 8) == 0)
343 {
344 *strp += 8;
345 code = BFD_RELOC_IP2K_LO8INSN;
346 }
347 else if (strncmp (*strp, "%hi8insn", 8) == 0)
348 {
349 *strp += 8;
350 code = BFD_RELOC_IP2K_HI8INSN;
351 }
352
353 /* Parse %op operand. */
354 if (code != BFD_RELOC_NONE)
355 {
356 errmsg = cgen_parse_address (cd, strp, opindex, code,
357 & result_type, & value);
358 if ((errmsg == NULL) &&
359 (result_type != CGEN_PARSE_OPERAND_RESULT_QUEUED))
360 errmsg = _("percent-operator operand is not a symbol");
361
362 *valuep = value;
363 }
364 /* Parse as a number. */
365 else
366 {
367 errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
368
369 /* Truncate to eight bits to accept both signed and unsigned input. */
370 if (errmsg == NULL)
371 *valuep &= 0xFF;
372 }
373
374 return errmsg;
375 }
376
377 static const char *
parse_bit3(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)378 parse_bit3 (CGEN_CPU_DESC cd,
379 const char **strp,
380 int opindex,
381 unsigned long *valuep)
382 {
383 const char *errmsg;
384 char mode = 0;
385 long count = 0;
386 unsigned long value;
387
388 if (strncmp (*strp, "%bit", 4) == 0)
389 {
390 *strp += 4;
391 mode = 1;
392 }
393 else if (strncmp (*strp, "%msbbit", 7) == 0)
394 {
395 *strp += 7;
396 mode = 1;
397 }
398 else if (strncmp (*strp, "%lsbbit", 7) == 0)
399 {
400 *strp += 7;
401 mode = 2;
402 }
403
404 errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
405 if (errmsg)
406 return errmsg;
407
408 if (mode)
409 {
410 value = * valuep;
411 if (value == 0)
412 {
413 errmsg = _("Attempt to find bit index of 0");
414 return errmsg;
415 }
416
417 if (mode == 1)
418 {
419 count = 31;
420 while ((value & 0x80000000) == 0)
421 {
422 count--;
423 value <<= 1;
424 }
425 }
426 else if (mode == 2)
427 {
428 count = 0;
429 while ((value & 0x00000001) == 0)
430 {
431 count++;
432 value >>= 1;
433 }
434 }
435
436 *valuep = count;
437 }
438
439 return errmsg;
440 }
441
442 /* -- dis.c */
443
444 const char * ip2k_cgen_parse_operand
445 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
446
447 /* Main entry point for operand parsing.
448
449 This function is basically just a big switch statement. Earlier versions
450 used tables to look up the function to use, but
451 - if the table contains both assembler and disassembler functions then
452 the disassembler contains much of the assembler and vice-versa,
453 - there's a lot of inlining possibilities as things grow,
454 - using a switch statement avoids the function call overhead.
455
456 This function could be moved into `parse_insn_normal', but keeping it
457 separate makes clear the interface between `parse_insn_normal' and each of
458 the handlers. */
459
460 const char *
ip2k_cgen_parse_operand(CGEN_CPU_DESC cd,int opindex,const char ** strp,CGEN_FIELDS * fields)461 ip2k_cgen_parse_operand (CGEN_CPU_DESC cd,
462 int opindex,
463 const char ** strp,
464 CGEN_FIELDS * fields)
465 {
466 const char * errmsg = NULL;
467 /* Used by scalar operands that still need to be parsed. */
468 long junk ATTRIBUTE_UNUSED;
469
470 switch (opindex)
471 {
472 case IP2K_OPERAND_ADDR16CJP :
473 errmsg = parse_addr16_cjp (cd, strp, IP2K_OPERAND_ADDR16CJP, (unsigned long *) (& fields->f_addr16cjp));
474 break;
475 case IP2K_OPERAND_ADDR16H :
476 errmsg = parse_addr16 (cd, strp, IP2K_OPERAND_ADDR16H, (unsigned long *) (& fields->f_imm8));
477 break;
478 case IP2K_OPERAND_ADDR16L :
479 errmsg = parse_addr16 (cd, strp, IP2K_OPERAND_ADDR16L, (unsigned long *) (& fields->f_imm8));
480 break;
481 case IP2K_OPERAND_ADDR16P :
482 errmsg = parse_addr16_cjp (cd, strp, IP2K_OPERAND_ADDR16P, (unsigned long *) (& fields->f_page3));
483 break;
484 case IP2K_OPERAND_BITNO :
485 errmsg = parse_bit3 (cd, strp, IP2K_OPERAND_BITNO, (unsigned long *) (& fields->f_bitno));
486 break;
487 case IP2K_OPERAND_CBIT :
488 errmsg = cgen_parse_unsigned_integer (cd, strp, IP2K_OPERAND_CBIT, (unsigned long *) (& junk));
489 break;
490 case IP2K_OPERAND_DCBIT :
491 errmsg = cgen_parse_unsigned_integer (cd, strp, IP2K_OPERAND_DCBIT, (unsigned long *) (& junk));
492 break;
493 case IP2K_OPERAND_FR :
494 errmsg = parse_fr (cd, strp, IP2K_OPERAND_FR, (unsigned long *) (& fields->f_reg));
495 break;
496 case IP2K_OPERAND_LIT8 :
497 errmsg = parse_lit8 (cd, strp, IP2K_OPERAND_LIT8, (long *) (& fields->f_imm8));
498 break;
499 case IP2K_OPERAND_PABITS :
500 errmsg = cgen_parse_unsigned_integer (cd, strp, IP2K_OPERAND_PABITS, (unsigned long *) (& junk));
501 break;
502 case IP2K_OPERAND_RETI3 :
503 errmsg = cgen_parse_unsigned_integer (cd, strp, IP2K_OPERAND_RETI3, (unsigned long *) (& fields->f_reti3));
504 break;
505 case IP2K_OPERAND_ZBIT :
506 errmsg = cgen_parse_unsigned_integer (cd, strp, IP2K_OPERAND_ZBIT, (unsigned long *) (& junk));
507 break;
508
509 default :
510 /* xgettext:c-format */
511 opcodes_error_handler
512 (_("internal error: unrecognized field %d while parsing"),
513 opindex);
514 abort ();
515 }
516
517 return errmsg;
518 }
519
520 cgen_parse_fn * const ip2k_cgen_parse_handlers[] =
521 {
522 parse_insn_normal,
523 };
524
525 void
ip2k_cgen_init_asm(CGEN_CPU_DESC cd)526 ip2k_cgen_init_asm (CGEN_CPU_DESC cd)
527 {
528 ip2k_cgen_init_opcode_table (cd);
529 ip2k_cgen_init_ibld_table (cd);
530 cd->parse_handlers = & ip2k_cgen_parse_handlers[0];
531 cd->parse_operand = ip2k_cgen_parse_operand;
532 #ifdef CGEN_ASM_INIT_HOOK
533 CGEN_ASM_INIT_HOOK
534 #endif
535 }
536
537
538
539 /* Regex construction routine.
540
541 This translates an opcode syntax string into a regex string,
542 by replacing any non-character syntax element (such as an
543 opcode) with the pattern '.*'
544
545 It then compiles the regex and stores it in the opcode, for
546 later use by ip2k_cgen_assemble_insn
547
548 Returns NULL for success, an error message for failure. */
549
550 char *
ip2k_cgen_build_insn_regex(CGEN_INSN * insn)551 ip2k_cgen_build_insn_regex (CGEN_INSN *insn)
552 {
553 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
554 const char *mnem = CGEN_INSN_MNEMONIC (insn);
555 char rxbuf[CGEN_MAX_RX_ELEMENTS];
556 char *rx = rxbuf;
557 const CGEN_SYNTAX_CHAR_TYPE *syn;
558 int reg_err;
559
560 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
561
562 /* Mnemonics come first in the syntax string. */
563 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
564 return _("missing mnemonic in syntax string");
565 ++syn;
566
567 /* Generate a case sensitive regular expression that emulates case
568 insensitive matching in the "C" locale. We cannot generate a case
569 insensitive regular expression because in Turkish locales, 'i' and 'I'
570 are not equal modulo case conversion. */
571
572 /* Copy the literal mnemonic out of the insn. */
573 for (; *mnem; mnem++)
574 {
575 char c = *mnem;
576
577 if (ISALPHA (c))
578 {
579 *rx++ = '[';
580 *rx++ = TOLOWER (c);
581 *rx++ = TOUPPER (c);
582 *rx++ = ']';
583 }
584 else
585 *rx++ = c;
586 }
587
588 /* Copy any remaining literals from the syntax string into the rx. */
589 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
590 {
591 if (CGEN_SYNTAX_CHAR_P (* syn))
592 {
593 char c = CGEN_SYNTAX_CHAR (* syn);
594
595 switch (c)
596 {
597 /* Escape any regex metacharacters in the syntax. */
598 case '.': case '[': case '\\':
599 case '*': case '^': case '$':
600
601 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
602 case '?': case '{': case '}':
603 case '(': case ')': case '*':
604 case '|': case '+': case ']':
605 #endif
606 *rx++ = '\\';
607 *rx++ = c;
608 break;
609
610 default:
611 if (ISALPHA (c))
612 {
613 *rx++ = '[';
614 *rx++ = TOLOWER (c);
615 *rx++ = TOUPPER (c);
616 *rx++ = ']';
617 }
618 else
619 *rx++ = c;
620 break;
621 }
622 }
623 else
624 {
625 /* Replace non-syntax fields with globs. */
626 *rx++ = '.';
627 *rx++ = '*';
628 }
629 }
630
631 /* Trailing whitespace ok. */
632 * rx++ = '[';
633 * rx++ = ' ';
634 * rx++ = '\t';
635 * rx++ = ']';
636 * rx++ = '*';
637
638 /* But anchor it after that. */
639 * rx++ = '$';
640 * rx = '\0';
641
642 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
643 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
644
645 if (reg_err == 0)
646 return NULL;
647 else
648 {
649 static char msg[80];
650
651 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
652 regfree ((regex_t *) CGEN_INSN_RX (insn));
653 free (CGEN_INSN_RX (insn));
654 (CGEN_INSN_RX (insn)) = NULL;
655 return msg;
656 }
657 }
658
659
660 /* Default insn parser.
661
662 The syntax string is scanned and operands are parsed and stored in FIELDS.
663 Relocs are queued as we go via other callbacks.
664
665 ??? Note that this is currently an all-or-nothing parser. If we fail to
666 parse the instruction, we return 0 and the caller will start over from
667 the beginning. Backtracking will be necessary in parsing subexpressions,
668 but that can be handled there. Not handling backtracking here may get
669 expensive in the case of the m68k. Deal with later.
670
671 Returns NULL for success, an error message for failure. */
672
673 static const char *
parse_insn_normal(CGEN_CPU_DESC cd,const CGEN_INSN * insn,const char ** strp,CGEN_FIELDS * fields)674 parse_insn_normal (CGEN_CPU_DESC cd,
675 const CGEN_INSN *insn,
676 const char **strp,
677 CGEN_FIELDS *fields)
678 {
679 /* ??? Runtime added insns not handled yet. */
680 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
681 const char *str = *strp;
682 const char *errmsg;
683 const char *p;
684 const CGEN_SYNTAX_CHAR_TYPE * syn;
685 #ifdef CGEN_MNEMONIC_OPERANDS
686 /* FIXME: wip */
687 int past_opcode_p;
688 #endif
689
690 /* For now we assume the mnemonic is first (there are no leading operands).
691 We can parse it without needing to set up operand parsing.
692 GAS's input scrubber will ensure mnemonics are lowercase, but we may
693 not be called from GAS. */
694 p = CGEN_INSN_MNEMONIC (insn);
695 while (*p && TOLOWER (*p) == TOLOWER (*str))
696 ++p, ++str;
697
698 if (* p)
699 return _("unrecognized instruction");
700
701 #ifndef CGEN_MNEMONIC_OPERANDS
702 if (* str && ! ISSPACE (* str))
703 return _("unrecognized instruction");
704 #endif
705
706 CGEN_INIT_PARSE (cd);
707 cgen_init_parse_operand (cd);
708 #ifdef CGEN_MNEMONIC_OPERANDS
709 past_opcode_p = 0;
710 #endif
711
712 /* We don't check for (*str != '\0') here because we want to parse
713 any trailing fake arguments in the syntax string. */
714 syn = CGEN_SYNTAX_STRING (syntax);
715
716 /* Mnemonics come first for now, ensure valid string. */
717 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
718 abort ();
719
720 ++syn;
721
722 while (* syn != 0)
723 {
724 /* Non operand chars must match exactly. */
725 if (CGEN_SYNTAX_CHAR_P (* syn))
726 {
727 /* FIXME: While we allow for non-GAS callers above, we assume the
728 first char after the mnemonic part is a space. */
729 /* FIXME: We also take inappropriate advantage of the fact that
730 GAS's input scrubber will remove extraneous blanks. */
731 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
732 {
733 #ifdef CGEN_MNEMONIC_OPERANDS
734 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
735 past_opcode_p = 1;
736 #endif
737 ++ syn;
738 ++ str;
739 }
740 else if (*str)
741 {
742 /* Syntax char didn't match. Can't be this insn. */
743 static char msg [80];
744
745 /* xgettext:c-format */
746 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
747 CGEN_SYNTAX_CHAR(*syn), *str);
748 return msg;
749 }
750 else
751 {
752 /* Ran out of input. */
753 static char msg [80];
754
755 /* xgettext:c-format */
756 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
757 CGEN_SYNTAX_CHAR(*syn));
758 return msg;
759 }
760 continue;
761 }
762
763 #ifdef CGEN_MNEMONIC_OPERANDS
764 (void) past_opcode_p;
765 #endif
766 /* We have an operand of some sort. */
767 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields);
768 if (errmsg)
769 return errmsg;
770
771 /* Done with this operand, continue with next one. */
772 ++ syn;
773 }
774
775 /* If we're at the end of the syntax string, we're done. */
776 if (* syn == 0)
777 {
778 /* FIXME: For the moment we assume a valid `str' can only contain
779 blanks now. IE: We needn't try again with a longer version of
780 the insn and it is assumed that longer versions of insns appear
781 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
782 while (ISSPACE (* str))
783 ++ str;
784
785 if (* str != '\0')
786 return _("junk at end of line"); /* FIXME: would like to include `str' */
787
788 return NULL;
789 }
790
791 /* We couldn't parse it. */
792 return _("unrecognized instruction");
793 }
794
795 /* Main entry point.
796 This routine is called for each instruction to be assembled.
797 STR points to the insn to be assembled.
798 We assume all necessary tables have been initialized.
799 The assembled instruction, less any fixups, is stored in BUF.
800 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
801 still needs to be converted to target byte order, otherwise BUF is an array
802 of bytes in target byte order.
803 The result is a pointer to the insn's entry in the opcode table,
804 or NULL if an error occured (an error message will have already been
805 printed).
806
807 Note that when processing (non-alias) macro-insns,
808 this function recurses.
809
810 ??? It's possible to make this cpu-independent.
811 One would have to deal with a few minor things.
812 At this point in time doing so would be more of a curiosity than useful
813 [for example this file isn't _that_ big], but keeping the possibility in
814 mind helps keep the design clean. */
815
816 const CGEN_INSN *
ip2k_cgen_assemble_insn(CGEN_CPU_DESC cd,const char * str,CGEN_FIELDS * fields,CGEN_INSN_BYTES_PTR buf,char ** errmsg)817 ip2k_cgen_assemble_insn (CGEN_CPU_DESC cd,
818 const char *str,
819 CGEN_FIELDS *fields,
820 CGEN_INSN_BYTES_PTR buf,
821 char **errmsg)
822 {
823 const char *start;
824 CGEN_INSN_LIST *ilist;
825 const char *parse_errmsg = NULL;
826 const char *insert_errmsg = NULL;
827 int recognized_mnemonic = 0;
828
829 /* Skip leading white space. */
830 while (ISSPACE (* str))
831 ++ str;
832
833 /* The instructions are stored in hashed lists.
834 Get the first in the list. */
835 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
836
837 /* Keep looking until we find a match. */
838 start = str;
839 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
840 {
841 const CGEN_INSN *insn = ilist->insn;
842 recognized_mnemonic = 1;
843
844 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
845 /* Not usually needed as unsupported opcodes
846 shouldn't be in the hash lists. */
847 /* Is this insn supported by the selected cpu? */
848 if (! ip2k_cgen_insn_supported (cd, insn))
849 continue;
850 #endif
851 /* If the RELAXED attribute is set, this is an insn that shouldn't be
852 chosen immediately. Instead, it is used during assembler/linker
853 relaxation if possible. */
854 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
855 continue;
856
857 str = start;
858
859 /* Skip this insn if str doesn't look right lexically. */
860 if (CGEN_INSN_RX (insn) != NULL &&
861 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
862 continue;
863
864 /* Allow parse/insert handlers to obtain length of insn. */
865 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
866
867 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
868 if (parse_errmsg != NULL)
869 continue;
870
871 /* ??? 0 is passed for `pc'. */
872 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
873 (bfd_vma) 0);
874 if (insert_errmsg != NULL)
875 continue;
876
877 /* It is up to the caller to actually output the insn and any
878 queued relocs. */
879 return insn;
880 }
881
882 {
883 static char errbuf[150];
884 const char *tmp_errmsg;
885 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
886 #define be_verbose 1
887 #else
888 #define be_verbose 0
889 #endif
890
891 if (be_verbose)
892 {
893 /* If requesting verbose error messages, use insert_errmsg.
894 Failing that, use parse_errmsg. */
895 tmp_errmsg = (insert_errmsg ? insert_errmsg :
896 parse_errmsg ? parse_errmsg :
897 recognized_mnemonic ?
898 _("unrecognized form of instruction") :
899 _("unrecognized instruction"));
900
901 if (strlen (start) > 50)
902 /* xgettext:c-format */
903 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
904 else
905 /* xgettext:c-format */
906 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
907 }
908 else
909 {
910 if (strlen (start) > 50)
911 /* xgettext:c-format */
912 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
913 else
914 /* xgettext:c-format */
915 sprintf (errbuf, _("bad instruction `%.50s'"), start);
916 }
917
918 *errmsg = errbuf;
919 return NULL;
920 }
921 }
922