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) 1996-2024 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 "iq2000-desc.h"
36 #include "iq2000-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 #include "safe-ctype.h"
55
56 static const char * MISSING_CLOSING_PARENTHESIS = N_("missing `)'");
57
58 /* Special check to ensure that instruction exists for given machine. */
59
60 int
iq2000_cgen_insn_supported(CGEN_CPU_DESC cd,const CGEN_INSN * insn)61 iq2000_cgen_insn_supported (CGEN_CPU_DESC cd, const CGEN_INSN *insn)
62 {
63 int machs = cd->machs;
64
65 return (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_MACH) & machs) != 0;
66 }
67
68 static int
iq2000_cgen_isa_register(const char ** strp)69 iq2000_cgen_isa_register (const char **strp)
70 {
71 int len;
72 int ch1, ch2;
73
74 if (**strp == 'r' || **strp == 'R')
75 {
76 len = strlen (*strp);
77 if (len == 2)
78 {
79 ch1 = (*strp)[1];
80 if ('0' <= ch1 && ch1 <= '9')
81 return 1;
82 }
83 else if (len == 3)
84 {
85 ch1 = (*strp)[1];
86 ch2 = (*strp)[2];
87 if (('1' <= ch1 && ch1 <= '2') && ('0' <= ch2 && ch2 <= '9'))
88 return 1;
89 if ('3' == ch1 && (ch2 == '0' || ch2 == '1'))
90 return 1;
91 }
92 }
93 if (**strp == '%'
94 && TOLOWER ((*strp)[1]) != 'l'
95 && TOLOWER ((*strp)[1]) != 'h')
96 return 1;
97 return 0;
98 }
99
100 /* Handle negated literal. */
101
102 static const char *
parse_mimm(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)103 parse_mimm (CGEN_CPU_DESC cd,
104 const char **strp,
105 int opindex,
106 unsigned long *valuep)
107 {
108 const char *errmsg;
109
110 /* Verify this isn't a register. */
111 if (iq2000_cgen_isa_register (strp))
112 errmsg = _("immediate value cannot be register");
113 else
114 {
115 long value;
116
117 errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value);
118 if (errmsg == NULL)
119 {
120 long x = (-value) & 0xFFFF0000;
121
122 if (x != 0 && x != (long) 0xFFFF0000)
123 errmsg = _("immediate value out of range");
124 else
125 *valuep = (-value & 0xFFFF);
126 }
127 }
128 return errmsg;
129 }
130
131 /* Handle signed/unsigned literal. */
132
133 static const char *
parse_imm(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)134 parse_imm (CGEN_CPU_DESC cd,
135 const char **strp,
136 int opindex,
137 unsigned long *valuep)
138 {
139 const char *errmsg;
140
141 if (iq2000_cgen_isa_register (strp))
142 errmsg = _("immediate value cannot be register");
143 else
144 {
145 long value;
146
147 errmsg = cgen_parse_signed_integer (cd, strp, opindex, & value);
148 if (errmsg == NULL)
149 {
150 long x = value & 0xFFFF0000;
151
152 if (x != 0 && x != (long) 0xFFFF0000)
153 errmsg = _("immediate value out of range");
154 else
155 *valuep = (value & 0xFFFF);
156 }
157 }
158 return errmsg;
159 }
160
161 /* Handle iq10 21-bit jmp offset. */
162
163 static const char *
parse_jtargq10(CGEN_CPU_DESC cd,const char ** strp,int opindex,int reloc ATTRIBUTE_UNUSED,enum cgen_parse_operand_result * type_addr ATTRIBUTE_UNUSED,bfd_vma * valuep)164 parse_jtargq10 (CGEN_CPU_DESC cd,
165 const char **strp,
166 int opindex,
167 int reloc ATTRIBUTE_UNUSED,
168 enum cgen_parse_operand_result *type_addr ATTRIBUTE_UNUSED,
169 bfd_vma *valuep)
170 {
171 const char *errmsg;
172 bfd_vma value;
173 enum cgen_parse_operand_result result_type = CGEN_PARSE_OPERAND_RESULT_NUMBER;
174
175 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IQ2000_OFFSET_21,
176 & result_type, & value);
177 if (errmsg == NULL && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
178 {
179 /* Check value is within 23-bits
180 (remembering that 2-bit shift right will occur). */
181 if (value > 0x7fffff)
182 return _("21-bit offset out of range");
183 }
184 *valuep = (value & 0x7FFFFF);
185 return errmsg;
186 }
187
188 /* Handle high(). */
189
190 static const char *
parse_hi16(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)191 parse_hi16 (CGEN_CPU_DESC cd,
192 const char **strp,
193 int opindex,
194 unsigned long *valuep)
195 {
196 if (strncasecmp (*strp, "%hi(", 4) == 0)
197 {
198 enum cgen_parse_operand_result result_type;
199 bfd_vma value;
200 const char *errmsg;
201
202 *strp += 4;
203 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16,
204 & result_type, & value);
205 if (**strp != ')')
206 return MISSING_CLOSING_PARENTHESIS;
207
208 ++*strp;
209 if (errmsg == NULL
210 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
211 {
212 /* If value has top-bit of %lo on, then it will
213 sign-propagate and so we compensate by adding
214 1 to the resultant %hi value. */
215 if (value & 0x8000)
216 value += 0x10000;
217 value >>= 16;
218 value &= 0xffff;
219 }
220 *valuep = value;
221
222 return errmsg;
223 }
224
225 /* We add %uhi in case a user just wants the high 16-bits or is using
226 an insn like ori for %lo which does not sign-propagate. */
227 if (strncasecmp (*strp, "%uhi(", 5) == 0)
228 {
229 enum cgen_parse_operand_result result_type;
230 bfd_vma value;
231 const char *errmsg;
232
233 *strp += 5;
234 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_IQ2000_UHI16,
235 & result_type, & value);
236 if (**strp != ')')
237 return MISSING_CLOSING_PARENTHESIS;
238
239 ++*strp;
240 if (errmsg == NULL
241 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
242 value >>= 16;
243
244 value &= 0xffff;
245 *valuep = value;
246
247 return errmsg;
248 }
249
250 return parse_imm (cd, strp, opindex, valuep);
251 }
252
253 /* Handle %lo in a signed context.
254 The signedness of the value doesn't matter to %lo(), but this also
255 handles the case where %lo() isn't present. */
256
257 static const char *
parse_lo16(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)258 parse_lo16 (CGEN_CPU_DESC cd,
259 const char **strp,
260 int opindex,
261 unsigned long *valuep)
262 {
263 if (strncasecmp (*strp, "%lo(", 4) == 0)
264 {
265 const char *errmsg;
266 enum cgen_parse_operand_result result_type;
267 bfd_vma value;
268
269 *strp += 4;
270 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16,
271 & result_type, & value);
272 if (**strp != ')')
273 return MISSING_CLOSING_PARENTHESIS;
274 ++*strp;
275 if (errmsg == NULL
276 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
277 value &= 0xffff;
278 *valuep = value;
279 return errmsg;
280 }
281
282 return parse_imm (cd, strp, opindex, valuep);
283 }
284
285 /* Handle %lo in a negated signed context.
286 The signedness of the value doesn't matter to %lo(), but this also
287 handles the case where %lo() isn't present. */
288
289 static const char *
parse_mlo16(CGEN_CPU_DESC cd,const char ** strp,int opindex,unsigned long * valuep)290 parse_mlo16 (CGEN_CPU_DESC cd,
291 const char **strp,
292 int opindex,
293 unsigned long *valuep)
294 {
295 if (strncasecmp (*strp, "%lo(", 4) == 0)
296 {
297 const char *errmsg;
298 enum cgen_parse_operand_result result_type;
299 bfd_vma value;
300
301 *strp += 4;
302 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16,
303 & result_type, & value);
304 if (**strp != ')')
305 return MISSING_CLOSING_PARENTHESIS;
306 ++*strp;
307 if (errmsg == NULL
308 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
309 value = (-value) & 0xffff;
310 *valuep = value;
311 return errmsg;
312 }
313
314 return parse_mimm (cd, strp, opindex, valuep);
315 }
316
317 /* -- */
318
319 const char * iq2000_cgen_parse_operand
320 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
321
322 /* Main entry point for operand parsing.
323
324 This function is basically just a big switch statement. Earlier versions
325 used tables to look up the function to use, but
326 - if the table contains both assembler and disassembler functions then
327 the disassembler contains much of the assembler and vice-versa,
328 - there's a lot of inlining possibilities as things grow,
329 - using a switch statement avoids the function call overhead.
330
331 This function could be moved into `parse_insn_normal', but keeping it
332 separate makes clear the interface between `parse_insn_normal' and each of
333 the handlers. */
334
335 const char *
iq2000_cgen_parse_operand(CGEN_CPU_DESC cd,int opindex,const char ** strp,CGEN_FIELDS * fields)336 iq2000_cgen_parse_operand (CGEN_CPU_DESC cd,
337 int opindex,
338 const char ** strp,
339 CGEN_FIELDS * fields)
340 {
341 const char * errmsg = NULL;
342 /* Used by scalar operands that still need to be parsed. */
343 long junk ATTRIBUTE_UNUSED;
344
345 switch (opindex)
346 {
347 case IQ2000_OPERAND__INDEX :
348 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND__INDEX, (unsigned long *) (& fields->f_index));
349 break;
350 case IQ2000_OPERAND_BASE :
351 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rs);
352 break;
353 case IQ2000_OPERAND_BASEOFF :
354 {
355 bfd_vma value = 0;
356 errmsg = cgen_parse_address (cd, strp, IQ2000_OPERAND_BASEOFF, 0, NULL, & value);
357 fields->f_imm = value;
358 }
359 break;
360 case IQ2000_OPERAND_BITNUM :
361 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_BITNUM, (unsigned long *) (& fields->f_rt));
362 break;
363 case IQ2000_OPERAND_BYTECOUNT :
364 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_BYTECOUNT, (unsigned long *) (& fields->f_bytecount));
365 break;
366 case IQ2000_OPERAND_CAM_Y :
367 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CAM_Y, (unsigned long *) (& fields->f_cam_y));
368 break;
369 case IQ2000_OPERAND_CAM_Z :
370 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CAM_Z, (unsigned long *) (& fields->f_cam_z));
371 break;
372 case IQ2000_OPERAND_CM_3FUNC :
373 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_3FUNC, (unsigned long *) (& fields->f_cm_3func));
374 break;
375 case IQ2000_OPERAND_CM_3Z :
376 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_3Z, (unsigned long *) (& fields->f_cm_3z));
377 break;
378 case IQ2000_OPERAND_CM_4FUNC :
379 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_4FUNC, (unsigned long *) (& fields->f_cm_4func));
380 break;
381 case IQ2000_OPERAND_CM_4Z :
382 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_CM_4Z, (unsigned long *) (& fields->f_cm_4z));
383 break;
384 case IQ2000_OPERAND_COUNT :
385 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_COUNT, (unsigned long *) (& fields->f_count));
386 break;
387 case IQ2000_OPERAND_EXECODE :
388 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_EXECODE, (unsigned long *) (& fields->f_excode));
389 break;
390 case IQ2000_OPERAND_HI16 :
391 errmsg = parse_hi16 (cd, strp, IQ2000_OPERAND_HI16, (unsigned long *) (& fields->f_imm));
392 break;
393 case IQ2000_OPERAND_IMM :
394 errmsg = parse_imm (cd, strp, IQ2000_OPERAND_IMM, (unsigned long *) (& fields->f_imm));
395 break;
396 case IQ2000_OPERAND_JMPTARG :
397 {
398 bfd_vma value = 0;
399 errmsg = cgen_parse_address (cd, strp, IQ2000_OPERAND_JMPTARG, 0, NULL, & value);
400 fields->f_jtarg = value;
401 }
402 break;
403 case IQ2000_OPERAND_JMPTARGQ10 :
404 {
405 bfd_vma value = 0;
406 errmsg = parse_jtargq10 (cd, strp, IQ2000_OPERAND_JMPTARGQ10, 0, NULL, & value);
407 fields->f_jtargq10 = value;
408 }
409 break;
410 case IQ2000_OPERAND_LO16 :
411 errmsg = parse_lo16 (cd, strp, IQ2000_OPERAND_LO16, (unsigned long *) (& fields->f_imm));
412 break;
413 case IQ2000_OPERAND_MASK :
414 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASK, (unsigned long *) (& fields->f_mask));
415 break;
416 case IQ2000_OPERAND_MASKL :
417 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASKL, (unsigned long *) (& fields->f_maskl));
418 break;
419 case IQ2000_OPERAND_MASKQ10 :
420 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASKQ10, (unsigned long *) (& fields->f_maskq10));
421 break;
422 case IQ2000_OPERAND_MASKR :
423 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_MASKR, (unsigned long *) (& fields->f_rs));
424 break;
425 case IQ2000_OPERAND_MLO16 :
426 errmsg = parse_mlo16 (cd, strp, IQ2000_OPERAND_MLO16, (unsigned long *) (& fields->f_imm));
427 break;
428 case IQ2000_OPERAND_OFFSET :
429 {
430 bfd_vma value = 0;
431 errmsg = cgen_parse_address (cd, strp, IQ2000_OPERAND_OFFSET, 0, NULL, & value);
432 fields->f_offset = value;
433 }
434 break;
435 case IQ2000_OPERAND_RD :
436 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rd);
437 break;
438 case IQ2000_OPERAND_RD_RS :
439 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rd_rs);
440 break;
441 case IQ2000_OPERAND_RD_RT :
442 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rd_rt);
443 break;
444 case IQ2000_OPERAND_RS :
445 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rs);
446 break;
447 case IQ2000_OPERAND_RT :
448 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rt);
449 break;
450 case IQ2000_OPERAND_RT_RS :
451 errmsg = cgen_parse_keyword (cd, strp, & iq2000_cgen_opval_gr_names, & fields->f_rt_rs);
452 break;
453 case IQ2000_OPERAND_SHAMT :
454 errmsg = cgen_parse_unsigned_integer (cd, strp, IQ2000_OPERAND_SHAMT, (unsigned long *) (& fields->f_shamt));
455 break;
456
457 default :
458 /* xgettext:c-format */
459 opcodes_error_handler
460 (_("internal error: unrecognized field %d while parsing"),
461 opindex);
462 abort ();
463 }
464
465 return errmsg;
466 }
467
468 cgen_parse_fn * const iq2000_cgen_parse_handlers[] =
469 {
470 parse_insn_normal,
471 };
472
473 void
iq2000_cgen_init_asm(CGEN_CPU_DESC cd)474 iq2000_cgen_init_asm (CGEN_CPU_DESC cd)
475 {
476 iq2000_cgen_init_opcode_table (cd);
477 iq2000_cgen_init_ibld_table (cd);
478 cd->parse_handlers = & iq2000_cgen_parse_handlers[0];
479 cd->parse_operand = iq2000_cgen_parse_operand;
480 #ifdef CGEN_ASM_INIT_HOOK
481 CGEN_ASM_INIT_HOOK
482 #endif
483 }
484
485
486
487 /* Regex construction routine.
488
489 This translates an opcode syntax string into a regex string,
490 by replacing any non-character syntax element (such as an
491 opcode) with the pattern '.*'
492
493 It then compiles the regex and stores it in the opcode, for
494 later use by iq2000_cgen_assemble_insn
495
496 Returns NULL for success, an error message for failure. */
497
498 char *
iq2000_cgen_build_insn_regex(CGEN_INSN * insn)499 iq2000_cgen_build_insn_regex (CGEN_INSN *insn)
500 {
501 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
502 const char *mnem = CGEN_INSN_MNEMONIC (insn);
503 char rxbuf[CGEN_MAX_RX_ELEMENTS];
504 char *rx = rxbuf;
505 const CGEN_SYNTAX_CHAR_TYPE *syn;
506 int reg_err;
507
508 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
509
510 /* Mnemonics come first in the syntax string. */
511 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
512 return _("missing mnemonic in syntax string");
513 ++syn;
514
515 /* Generate a case sensitive regular expression that emulates case
516 insensitive matching in the "C" locale. We cannot generate a case
517 insensitive regular expression because in Turkish locales, 'i' and 'I'
518 are not equal modulo case conversion. */
519
520 /* Copy the literal mnemonic out of the insn. */
521 for (; *mnem; mnem++)
522 {
523 char c = *mnem;
524
525 if (ISALPHA (c))
526 {
527 *rx++ = '[';
528 *rx++ = TOLOWER (c);
529 *rx++ = TOUPPER (c);
530 *rx++ = ']';
531 }
532 else
533 *rx++ = c;
534 }
535
536 /* Copy any remaining literals from the syntax string into the rx. */
537 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
538 {
539 if (CGEN_SYNTAX_CHAR_P (* syn))
540 {
541 char c = CGEN_SYNTAX_CHAR (* syn);
542
543 switch (c)
544 {
545 /* Escape any regex metacharacters in the syntax. */
546 case '.': case '[': case '\\':
547 case '*': case '^': case '$':
548
549 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
550 case '?': case '{': case '}':
551 case '(': case ')': case '*':
552 case '|': case '+': case ']':
553 #endif
554 *rx++ = '\\';
555 *rx++ = c;
556 break;
557
558 default:
559 if (ISALPHA (c))
560 {
561 *rx++ = '[';
562 *rx++ = TOLOWER (c);
563 *rx++ = TOUPPER (c);
564 *rx++ = ']';
565 }
566 else
567 *rx++ = c;
568 break;
569 }
570 }
571 else
572 {
573 /* Replace non-syntax fields with globs. */
574 *rx++ = '.';
575 *rx++ = '*';
576 }
577 }
578
579 /* Trailing whitespace ok. */
580 * rx++ = '[';
581 * rx++ = ' ';
582 * rx++ = '\t';
583 * rx++ = ']';
584 * rx++ = '*';
585
586 /* But anchor it after that. */
587 * rx++ = '$';
588 * rx = '\0';
589
590 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
591 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
592
593 if (reg_err == 0)
594 return NULL;
595 else
596 {
597 static char msg[80];
598
599 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
600 regfree ((regex_t *) CGEN_INSN_RX (insn));
601 free (CGEN_INSN_RX (insn));
602 (CGEN_INSN_RX (insn)) = NULL;
603 return msg;
604 }
605 }
606
607
608 /* Default insn parser.
609
610 The syntax string is scanned and operands are parsed and stored in FIELDS.
611 Relocs are queued as we go via other callbacks.
612
613 ??? Note that this is currently an all-or-nothing parser. If we fail to
614 parse the instruction, we return 0 and the caller will start over from
615 the beginning. Backtracking will be necessary in parsing subexpressions,
616 but that can be handled there. Not handling backtracking here may get
617 expensive in the case of the m68k. Deal with later.
618
619 Returns NULL for success, an error message for failure. */
620
621 static const char *
parse_insn_normal(CGEN_CPU_DESC cd,const CGEN_INSN * insn,const char ** strp,CGEN_FIELDS * fields)622 parse_insn_normal (CGEN_CPU_DESC cd,
623 const CGEN_INSN *insn,
624 const char **strp,
625 CGEN_FIELDS *fields)
626 {
627 /* ??? Runtime added insns not handled yet. */
628 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
629 const char *str = *strp;
630 const char *errmsg;
631 const char *p;
632 const CGEN_SYNTAX_CHAR_TYPE * syn;
633 #ifdef CGEN_MNEMONIC_OPERANDS
634 /* FIXME: wip */
635 int past_opcode_p;
636 #endif
637
638 /* For now we assume the mnemonic is first (there are no leading operands).
639 We can parse it without needing to set up operand parsing.
640 GAS's input scrubber will ensure mnemonics are lowercase, but we may
641 not be called from GAS. */
642 p = CGEN_INSN_MNEMONIC (insn);
643 while (*p && TOLOWER (*p) == TOLOWER (*str))
644 ++p, ++str;
645
646 if (* p)
647 return _("unrecognized instruction");
648
649 #ifndef CGEN_MNEMONIC_OPERANDS
650 if (* str && ! ISSPACE (* str))
651 return _("unrecognized instruction");
652 #endif
653
654 CGEN_INIT_PARSE (cd);
655 cgen_init_parse_operand (cd);
656 #ifdef CGEN_MNEMONIC_OPERANDS
657 past_opcode_p = 0;
658 #endif
659
660 /* We don't check for (*str != '\0') here because we want to parse
661 any trailing fake arguments in the syntax string. */
662 syn = CGEN_SYNTAX_STRING (syntax);
663
664 /* Mnemonics come first for now, ensure valid string. */
665 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
666 abort ();
667
668 ++syn;
669
670 while (* syn != 0)
671 {
672 /* Non operand chars must match exactly. */
673 if (CGEN_SYNTAX_CHAR_P (* syn))
674 {
675 /* FIXME: While we allow for non-GAS callers above, we assume the
676 first char after the mnemonic part is a space. */
677 /* FIXME: We also take inappropriate advantage of the fact that
678 GAS's input scrubber will remove extraneous blanks. */
679 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
680 {
681 #ifdef CGEN_MNEMONIC_OPERANDS
682 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
683 past_opcode_p = 1;
684 #endif
685 ++ syn;
686 ++ str;
687 }
688 else if (*str)
689 {
690 /* Syntax char didn't match. Can't be this insn. */
691 static char msg [80];
692
693 /* xgettext:c-format */
694 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
695 CGEN_SYNTAX_CHAR(*syn), *str);
696 return msg;
697 }
698 else
699 {
700 /* Ran out of input. */
701 static char msg [80];
702
703 /* xgettext:c-format */
704 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
705 CGEN_SYNTAX_CHAR(*syn));
706 return msg;
707 }
708 continue;
709 }
710
711 #ifdef CGEN_MNEMONIC_OPERANDS
712 (void) past_opcode_p;
713 #endif
714 /* We have an operand of some sort. */
715 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields);
716 if (errmsg)
717 return errmsg;
718
719 /* Done with this operand, continue with next one. */
720 ++ syn;
721 }
722
723 /* If we're at the end of the syntax string, we're done. */
724 if (* syn == 0)
725 {
726 /* FIXME: For the moment we assume a valid `str' can only contain
727 blanks now. IE: We needn't try again with a longer version of
728 the insn and it is assumed that longer versions of insns appear
729 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
730 while (ISSPACE (* str))
731 ++ str;
732
733 if (* str != '\0')
734 return _("junk at end of line"); /* FIXME: would like to include `str' */
735
736 return NULL;
737 }
738
739 /* We couldn't parse it. */
740 return _("unrecognized instruction");
741 }
742
743 /* Main entry point.
744 This routine is called for each instruction to be assembled.
745 STR points to the insn to be assembled.
746 We assume all necessary tables have been initialized.
747 The assembled instruction, less any fixups, is stored in BUF.
748 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
749 still needs to be converted to target byte order, otherwise BUF is an array
750 of bytes in target byte order.
751 The result is a pointer to the insn's entry in the opcode table,
752 or NULL if an error occured (an error message will have already been
753 printed).
754
755 Note that when processing (non-alias) macro-insns,
756 this function recurses.
757
758 ??? It's possible to make this cpu-independent.
759 One would have to deal with a few minor things.
760 At this point in time doing so would be more of a curiosity than useful
761 [for example this file isn't _that_ big], but keeping the possibility in
762 mind helps keep the design clean. */
763
764 const CGEN_INSN *
iq2000_cgen_assemble_insn(CGEN_CPU_DESC cd,const char * str,CGEN_FIELDS * fields,CGEN_INSN_BYTES_PTR buf,char ** errmsg)765 iq2000_cgen_assemble_insn (CGEN_CPU_DESC cd,
766 const char *str,
767 CGEN_FIELDS *fields,
768 CGEN_INSN_BYTES_PTR buf,
769 char **errmsg)
770 {
771 const char *start;
772 CGEN_INSN_LIST *ilist;
773 const char *parse_errmsg = NULL;
774 const char *insert_errmsg = NULL;
775 int recognized_mnemonic = 0;
776
777 /* Skip leading white space. */
778 while (ISSPACE (* str))
779 ++ str;
780
781 /* The instructions are stored in hashed lists.
782 Get the first in the list. */
783 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
784
785 /* Keep looking until we find a match. */
786 start = str;
787 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
788 {
789 const CGEN_INSN *insn = ilist->insn;
790 recognized_mnemonic = 1;
791
792 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
793 /* Not usually needed as unsupported opcodes
794 shouldn't be in the hash lists. */
795 /* Is this insn supported by the selected cpu? */
796 if (! iq2000_cgen_insn_supported (cd, insn))
797 continue;
798 #endif
799 /* If the RELAXED attribute is set, this is an insn that shouldn't be
800 chosen immediately. Instead, it is used during assembler/linker
801 relaxation if possible. */
802 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
803 continue;
804
805 str = start;
806
807 /* Skip this insn if str doesn't look right lexically. */
808 if (CGEN_INSN_RX (insn) != NULL &&
809 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
810 continue;
811
812 /* Allow parse/insert handlers to obtain length of insn. */
813 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
814
815 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
816 if (parse_errmsg != NULL)
817 continue;
818
819 /* ??? 0 is passed for `pc'. */
820 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
821 (bfd_vma) 0);
822 if (insert_errmsg != NULL)
823 continue;
824
825 /* It is up to the caller to actually output the insn and any
826 queued relocs. */
827 return insn;
828 }
829
830 {
831 static char errbuf[150];
832 const char *tmp_errmsg;
833 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
834 #define be_verbose 1
835 #else
836 #define be_verbose 0
837 #endif
838
839 if (be_verbose)
840 {
841 /* If requesting verbose error messages, use insert_errmsg.
842 Failing that, use parse_errmsg. */
843 tmp_errmsg = (insert_errmsg ? insert_errmsg :
844 parse_errmsg ? parse_errmsg :
845 recognized_mnemonic ?
846 _("unrecognized form of instruction") :
847 _("unrecognized instruction"));
848
849 if (strlen (start) > 50)
850 /* xgettext:c-format */
851 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
852 else
853 /* xgettext:c-format */
854 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
855 }
856 else
857 {
858 if (strlen (start) > 50)
859 /* xgettext:c-format */
860 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
861 else
862 /* xgettext:c-format */
863 sprintf (errbuf, _("bad instruction `%.50s'"), start);
864 }
865
866 *errmsg = errbuf;
867 return NULL;
868 }
869 }
870