Commit | Line | Data |
---|---|---|
87e6d782 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 Free Software Foundation, Inc. | |
8 | ||
9 | This file is part of the GNU Binutils and GDB, the GNU debugger. | |
10 | ||
11 | This program is free software; you can redistribute it and/or modify | |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2, or (at your option) | |
14 | any later version. | |
15 | ||
16 | This program is distributed in the hope that it will be useful, | |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with this program; if not, write to the Free Software Foundation, Inc., | |
23 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
24 | ||
25 | /* ??? Eventually more and more of this stuff can go to cpu-independent files. | |
26 | Keep that in mind. */ | |
27 | ||
28 | #include "sysdep.h" | |
29 | #include <ctype.h> | |
30 | #include <stdio.h> | |
31 | #include "ansidecl.h" | |
32 | #include "bfd.h" | |
33 | #include "symcat.h" | |
34 | #include "openrisc-desc.h" | |
35 | #include "openrisc-opc.h" | |
36 | #include "opintl.h" | |
37 | ||
38 | #undef min | |
39 | #define min(a,b) ((a) < (b) ? (a) : (b)) | |
40 | #undef max | |
41 | #define max(a,b) ((a) > (b) ? (a) : (b)) | |
42 | ||
43 | static const char * parse_insn_normal | |
44 | PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *)); | |
45 | \f | |
46 | /* -- assembler routines inserted here */ | |
47 | ||
48 | /* -- asm.c */ | |
49 | ||
50 | #define CGEN_VERBOSE_ASSEMBLER_ERRORS | |
51 | ||
52 | long | |
53 | openrisc_sign_extend_16bit (value) | |
54 | long value; | |
55 | { | |
56 | return (long) (short) value; | |
57 | } | |
58 | ||
59 | ||
60 | /* Handle hi(). */ | |
61 | ||
62 | static const char * | |
63 | parse_hi16 (cd, strp, opindex, valuep) | |
64 | CGEN_CPU_DESC cd; | |
65 | const char **strp; | |
66 | int opindex; | |
67 | unsigned long *valuep; | |
68 | { | |
69 | const char *errmsg; | |
70 | enum cgen_parse_operand_result result_type; | |
71 | bfd_vma value; | |
72 | ||
73 | if (**strp == '#') | |
74 | ++*strp; | |
75 | ||
76 | if (strncasecmp (*strp, "hi(", 3) == 0) | |
77 | { | |
78 | *strp += 3; | |
79 | ||
80 | #if 0 | |
81 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep); | |
82 | if (errmsg != NULL) | |
83 | fprintf (stderr, "parse_hi: %s\n", errmsg); | |
84 | if (errmsg != NULL) | |
85 | #endif | |
86 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16, | |
87 | &result_type, &value); | |
88 | if (**strp != ')') | |
89 | return "missing `)'"; | |
90 | ++*strp; | |
91 | if (errmsg == NULL | |
92 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
93 | value >>= 16; | |
94 | *valuep = (long) (short) value; | |
95 | ||
96 | return errmsg; | |
97 | } | |
98 | else | |
99 | { | |
100 | if (**strp == '-') | |
101 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, (long *) &value); | |
102 | else | |
103 | errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, &value); | |
104 | } | |
105 | *valuep = (long) (short) (value & 0xffff); | |
106 | return errmsg; | |
107 | } | |
108 | ||
109 | ||
110 | /* Handle lo() */ | |
111 | ||
112 | static const char * | |
113 | parse_lo16 (cd, strp, opindex, valuep) | |
114 | CGEN_CPU_DESC cd; | |
115 | const char **strp; | |
116 | int opindex; | |
117 | unsigned long *valuep; | |
118 | { | |
119 | const char *errmsg; | |
120 | enum cgen_parse_operand_result result_type; | |
121 | bfd_vma value; | |
122 | ||
123 | if (**strp == '#') | |
124 | ++*strp; | |
125 | ||
126 | if (strncasecmp (*strp, "lo(", 3) == 0) | |
127 | { | |
128 | *strp += 3; | |
129 | ||
130 | #if 0 | |
131 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep); | |
132 | if (errmsg != NULL) | |
133 | fprintf (stderr, "parse_lo: %s\n", errmsg); | |
134 | ||
135 | if (errmsg != NULL) | |
136 | #endif | |
137 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16, | |
138 | &result_type, &value); | |
139 | if (**strp != ')') | |
140 | return "missing `)'"; | |
141 | ++*strp; | |
142 | if (errmsg == NULL | |
143 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
144 | value &= 0xffff; | |
145 | *valuep = (long) (short) value; | |
146 | ||
147 | return errmsg; | |
148 | } | |
149 | ||
150 | if (**strp == '-') | |
151 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, (long *) &value); | |
152 | else | |
153 | errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, &value); | |
154 | *valuep = (long) (short) (value & 0xffff); | |
155 | return errmsg; | |
156 | } | |
157 | ||
158 | /* -- */ | |
159 | ||
160 | /* Main entry point for operand parsing. | |
161 | ||
162 | This function is basically just a big switch statement. Earlier versions | |
163 | used tables to look up the function to use, but | |
164 | - if the table contains both assembler and disassembler functions then | |
165 | the disassembler contains much of the assembler and vice-versa, | |
166 | - there's a lot of inlining possibilities as things grow, | |
167 | - using a switch statement avoids the function call overhead. | |
168 | ||
169 | This function could be moved into `parse_insn_normal', but keeping it | |
170 | separate makes clear the interface between `parse_insn_normal' and each of | |
171 | the handlers. | |
172 | */ | |
173 | ||
174 | const char * | |
175 | openrisc_cgen_parse_operand (cd, opindex, strp, fields) | |
176 | CGEN_CPU_DESC cd; | |
177 | int opindex; | |
178 | const char ** strp; | |
179 | CGEN_FIELDS * fields; | |
180 | { | |
181 | const char * errmsg = NULL; | |
182 | /* Used by scalar operands that still need to be parsed. */ | |
183 | long junk; | |
184 | ||
185 | switch (opindex) | |
186 | { | |
187 | case OPENRISC_OPERAND_ABS_26 : | |
188 | { | |
189 | bfd_vma value; | |
190 | errmsg = cgen_parse_address (cd, strp, OPENRISC_OPERAND_ABS_26, 0, NULL, & value); | |
191 | fields->f_abs26 = value; | |
192 | } | |
193 | break; | |
194 | case OPENRISC_OPERAND_DISP_26 : | |
195 | { | |
196 | bfd_vma value; | |
197 | errmsg = cgen_parse_address (cd, strp, OPENRISC_OPERAND_DISP_26, 0, NULL, & value); | |
198 | fields->f_disp26 = value; | |
199 | } | |
200 | break; | |
201 | case OPENRISC_OPERAND_HI16 : | |
202 | errmsg = parse_hi16 (cd, strp, OPENRISC_OPERAND_HI16, &fields->f_simm16); | |
203 | break; | |
204 | case OPENRISC_OPERAND_LO16 : | |
205 | errmsg = parse_lo16 (cd, strp, OPENRISC_OPERAND_LO16, &fields->f_lo16); | |
206 | break; | |
207 | case OPENRISC_OPERAND_OP_F_23 : | |
208 | errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_OP_F_23, &fields->f_op4); | |
209 | break; | |
210 | case OPENRISC_OPERAND_OP_F_3 : | |
211 | errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_OP_F_3, &fields->f_op5); | |
212 | break; | |
213 | case OPENRISC_OPERAND_RA : | |
214 | errmsg = cgen_parse_keyword (cd, strp, & openrisc_cgen_opval_h_gr, & fields->f_r2); | |
215 | break; | |
216 | case OPENRISC_OPERAND_RB : | |
217 | errmsg = cgen_parse_keyword (cd, strp, & openrisc_cgen_opval_h_gr, & fields->f_r3); | |
218 | break; | |
219 | case OPENRISC_OPERAND_RD : | |
220 | errmsg = cgen_parse_keyword (cd, strp, & openrisc_cgen_opval_h_gr, & fields->f_r1); | |
221 | break; | |
222 | case OPENRISC_OPERAND_SIMM_16 : | |
223 | errmsg = cgen_parse_signed_integer (cd, strp, OPENRISC_OPERAND_SIMM_16, &fields->f_simm16); | |
224 | break; | |
225 | case OPENRISC_OPERAND_UI16NC : | |
226 | errmsg = parse_lo16 (cd, strp, OPENRISC_OPERAND_UI16NC, &fields->f_i16nc); | |
227 | break; | |
228 | case OPENRISC_OPERAND_UIMM_16 : | |
229 | errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_UIMM_16, &fields->f_uimm16); | |
230 | break; | |
231 | case OPENRISC_OPERAND_UIMM_5 : | |
232 | errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_UIMM_5, &fields->f_uimm5); | |
233 | break; | |
234 | ||
235 | default : | |
236 | /* xgettext:c-format */ | |
237 | fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex); | |
238 | abort (); | |
239 | } | |
240 | ||
241 | return errmsg; | |
242 | } | |
243 | ||
244 | cgen_parse_fn * const openrisc_cgen_parse_handlers[] = | |
245 | { | |
246 | parse_insn_normal, | |
247 | }; | |
248 | ||
249 | void | |
250 | openrisc_cgen_init_asm (cd) | |
251 | CGEN_CPU_DESC cd; | |
252 | { | |
253 | openrisc_cgen_init_opcode_table (cd); | |
254 | openrisc_cgen_init_ibld_table (cd); | |
255 | cd->parse_handlers = & openrisc_cgen_parse_handlers[0]; | |
256 | cd->parse_operand = openrisc_cgen_parse_operand; | |
257 | } | |
258 | ||
259 | \f | |
260 | /* Default insn parser. | |
261 | ||
262 | The syntax string is scanned and operands are parsed and stored in FIELDS. | |
263 | Relocs are queued as we go via other callbacks. | |
264 | ||
265 | ??? Note that this is currently an all-or-nothing parser. If we fail to | |
266 | parse the instruction, we return 0 and the caller will start over from | |
267 | the beginning. Backtracking will be necessary in parsing subexpressions, | |
268 | but that can be handled there. Not handling backtracking here may get | |
269 | expensive in the case of the m68k. Deal with later. | |
270 | ||
271 | Returns NULL for success, an error message for failure. | |
272 | */ | |
273 | ||
274 | static const char * | |
275 | parse_insn_normal (cd, insn, strp, fields) | |
276 | CGEN_CPU_DESC cd; | |
277 | const CGEN_INSN *insn; | |
278 | const char **strp; | |
279 | CGEN_FIELDS *fields; | |
280 | { | |
281 | /* ??? Runtime added insns not handled yet. */ | |
282 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
283 | const char *str = *strp; | |
284 | const char *errmsg; | |
285 | const char *p; | |
286 | const CGEN_SYNTAX_CHAR_TYPE * syn; | |
287 | #ifdef CGEN_MNEMONIC_OPERANDS | |
288 | /* FIXME: wip */ | |
289 | int past_opcode_p; | |
290 | #endif | |
291 | ||
292 | /* For now we assume the mnemonic is first (there are no leading operands). | |
293 | We can parse it without needing to set up operand parsing. | |
294 | GAS's input scrubber will ensure mnemonics are lowercase, but we may | |
295 | not be called from GAS. */ | |
296 | p = CGEN_INSN_MNEMONIC (insn); | |
297 | while (*p && tolower (*p) == tolower (*str)) | |
298 | ++p, ++str; | |
299 | ||
300 | if (* p) | |
301 | return _("unrecognized instruction"); | |
302 | ||
303 | #ifndef CGEN_MNEMONIC_OPERANDS | |
304 | if (* str && !isspace (* str)) | |
305 | return _("unrecognized instruction"); | |
306 | #endif | |
307 | ||
308 | CGEN_INIT_PARSE (cd); | |
309 | cgen_init_parse_operand (cd); | |
310 | #ifdef CGEN_MNEMONIC_OPERANDS | |
311 | past_opcode_p = 0; | |
312 | #endif | |
313 | ||
314 | /* We don't check for (*str != '\0') here because we want to parse | |
315 | any trailing fake arguments in the syntax string. */ | |
316 | syn = CGEN_SYNTAX_STRING (syntax); | |
317 | ||
318 | /* Mnemonics come first for now, ensure valid string. */ | |
319 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) | |
320 | abort (); | |
321 | ||
322 | ++syn; | |
323 | ||
324 | while (* syn != 0) | |
325 | { | |
326 | /* Non operand chars must match exactly. */ | |
327 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
328 | { | |
329 | /* FIXME: While we allow for non-GAS callers above, we assume the | |
330 | first char after the mnemonic part is a space. */ | |
331 | /* FIXME: We also take inappropriate advantage of the fact that | |
332 | GAS's input scrubber will remove extraneous blanks. */ | |
333 | if (tolower (*str) == tolower (CGEN_SYNTAX_CHAR (* syn))) | |
334 | { | |
335 | #ifdef CGEN_MNEMONIC_OPERANDS | |
336 | if (CGEN_SYNTAX_CHAR(* syn) == ' ') | |
337 | past_opcode_p = 1; | |
338 | #endif | |
339 | ++ syn; | |
340 | ++ str; | |
341 | } | |
342 | else if (*str) | |
343 | { | |
344 | /* Syntax char didn't match. Can't be this insn. */ | |
345 | static char msg [80]; | |
346 | /* xgettext:c-format */ | |
347 | sprintf (msg, _("syntax error (expected char `%c', found `%c')"), | |
348 | CGEN_SYNTAX_CHAR(*syn), *str); | |
349 | return msg; | |
350 | } | |
351 | else | |
352 | { | |
353 | /* Ran out of input. */ | |
354 | static char msg [80]; | |
355 | /* xgettext:c-format */ | |
356 | sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), | |
357 | CGEN_SYNTAX_CHAR(*syn)); | |
358 | return msg; | |
359 | } | |
360 | continue; | |
361 | } | |
362 | ||
363 | /* We have an operand of some sort. */ | |
364 | errmsg = openrisc_cgen_parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), | |
365 | &str, fields); | |
366 | if (errmsg) | |
367 | return errmsg; | |
368 | ||
369 | /* Done with this operand, continue with next one. */ | |
370 | ++ syn; | |
371 | } | |
372 | ||
373 | /* If we're at the end of the syntax string, we're done. */ | |
374 | if (* syn == 0) | |
375 | { | |
376 | /* FIXME: For the moment we assume a valid `str' can only contain | |
377 | blanks now. IE: We needn't try again with a longer version of | |
378 | the insn and it is assumed that longer versions of insns appear | |
379 | before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ | |
380 | while (isspace (* str)) | |
381 | ++ str; | |
382 | ||
383 | if (* str != '\0') | |
384 | return _("junk at end of line"); /* FIXME: would like to include `str' */ | |
385 | ||
386 | return NULL; | |
387 | } | |
388 | ||
389 | /* We couldn't parse it. */ | |
390 | return _("unrecognized instruction"); | |
391 | } | |
392 | \f | |
393 | /* Main entry point. | |
394 | This routine is called for each instruction to be assembled. | |
395 | STR points to the insn to be assembled. | |
396 | We assume all necessary tables have been initialized. | |
397 | The assembled instruction, less any fixups, is stored in BUF. | |
398 | Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value | |
399 | still needs to be converted to target byte order, otherwise BUF is an array | |
400 | of bytes in target byte order. | |
401 | The result is a pointer to the insn's entry in the opcode table, | |
402 | or NULL if an error occured (an error message will have already been | |
403 | printed). | |
404 | ||
405 | Note that when processing (non-alias) macro-insns, | |
406 | this function recurses. | |
407 | ||
408 | ??? It's possible to make this cpu-independent. | |
409 | One would have to deal with a few minor things. | |
410 | At this point in time doing so would be more of a curiosity than useful | |
411 | [for example this file isn't _that_ big], but keeping the possibility in | |
412 | mind helps keep the design clean. */ | |
413 | ||
414 | const CGEN_INSN * | |
415 | openrisc_cgen_assemble_insn (cd, str, fields, buf, errmsg) | |
416 | CGEN_CPU_DESC cd; | |
417 | const char *str; | |
418 | CGEN_FIELDS *fields; | |
419 | CGEN_INSN_BYTES_PTR buf; | |
420 | char **errmsg; | |
421 | { | |
422 | const char *start; | |
423 | CGEN_INSN_LIST *ilist; | |
424 | const char *parse_errmsg = NULL; | |
425 | const char *insert_errmsg = NULL; | |
426 | ||
427 | /* Skip leading white space. */ | |
428 | while (isspace (* str)) | |
429 | ++ str; | |
430 | ||
431 | /* The instructions are stored in hashed lists. | |
432 | Get the first in the list. */ | |
433 | ilist = CGEN_ASM_LOOKUP_INSN (cd, str); | |
434 | ||
435 | /* Keep looking until we find a match. */ | |
436 | ||
437 | start = str; | |
438 | for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) | |
439 | { | |
440 | const CGEN_INSN *insn = ilist->insn; | |
441 | ||
442 | #ifdef CGEN_VALIDATE_INSN_SUPPORTED | |
443 | /* not usually needed as unsupported opcodes shouldn't be in the hash lists */ | |
444 | /* Is this insn supported by the selected cpu? */ | |
445 | if (! openrisc_cgen_insn_supported (cd, insn)) | |
446 | continue; | |
447 | #endif | |
448 | ||
449 | /* If the RELAX attribute is set, this is an insn that shouldn't be | |
450 | chosen immediately. Instead, it is used during assembler/linker | |
451 | relaxation if possible. */ | |
452 | if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX) != 0) | |
453 | continue; | |
454 | ||
455 | str = start; | |
456 | ||
457 | /* Allow parse/insert handlers to obtain length of insn. */ | |
458 | CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); | |
459 | ||
460 | parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); | |
461 | if (parse_errmsg != NULL) | |
462 | continue; | |
463 | ||
464 | /* ??? 0 is passed for `pc' */ | |
465 | insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, | |
466 | (bfd_vma) 0); | |
467 | if (insert_errmsg != NULL) | |
468 | continue; | |
469 | ||
470 | /* It is up to the caller to actually output the insn and any | |
471 | queued relocs. */ | |
472 | return insn; | |
473 | } | |
474 | ||
475 | { | |
476 | static char errbuf[150]; | |
477 | #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS | |
478 | const char *tmp_errmsg; | |
479 | ||
480 | /* If requesting verbose error messages, use insert_errmsg. | |
481 | Failing that, use parse_errmsg */ | |
482 | tmp_errmsg = (insert_errmsg ? insert_errmsg : | |
483 | parse_errmsg ? parse_errmsg : | |
484 | _("unrecognized instruction")); | |
485 | ||
486 | if (strlen (start) > 50) | |
487 | /* xgettext:c-format */ | |
488 | sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); | |
489 | else | |
490 | /* xgettext:c-format */ | |
491 | sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); | |
492 | #else | |
493 | if (strlen (start) > 50) | |
494 | /* xgettext:c-format */ | |
495 | sprintf (errbuf, _("bad instruction `%.50s...'"), start); | |
496 | else | |
497 | /* xgettext:c-format */ | |
498 | sprintf (errbuf, _("bad instruction `%.50s'"), start); | |
499 | #endif | |
500 | ||
501 | *errmsg = errbuf; | |
502 | return NULL; | |
503 | } | |
504 | } | |
505 | \f | |
506 | #if 0 /* This calls back to GAS which we can't do without care. */ | |
507 | ||
508 | /* Record each member of OPVALS in the assembler's symbol table. | |
509 | This lets GAS parse registers for us. | |
510 | ??? Interesting idea but not currently used. */ | |
511 | ||
512 | /* Record each member of OPVALS in the assembler's symbol table. | |
513 | FIXME: Not currently used. */ | |
514 | ||
515 | void | |
516 | openrisc_cgen_asm_hash_keywords (cd, opvals) | |
517 | CGEN_CPU_DESC cd; | |
518 | CGEN_KEYWORD *opvals; | |
519 | { | |
520 | CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL); | |
521 | const CGEN_KEYWORD_ENTRY * ke; | |
522 | ||
523 | while ((ke = cgen_keyword_search_next (& search)) != NULL) | |
524 | { | |
525 | #if 0 /* Unnecessary, should be done in the search routine. */ | |
526 | if (! openrisc_cgen_opval_supported (ke)) | |
527 | continue; | |
528 | #endif | |
529 | cgen_asm_record_register (cd, ke->name, ke->value); | |
530 | } | |
531 | } | |
532 | ||
533 | #endif /* 0 */ |