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" | |
87e6d782 NC |
29 | #include <stdio.h> |
30 | #include "ansidecl.h" | |
31 | #include "bfd.h" | |
32 | #include "symcat.h" | |
33 | #include "openrisc-desc.h" | |
34 | #include "openrisc-opc.h" | |
35 | #include "opintl.h" | |
fc7bc883 | 36 | #include "xregex.h" |
fc05c67f | 37 | #include "libiberty.h" |
37111cc7 | 38 | #include "safe-ctype.h" |
87e6d782 | 39 | |
37111cc7 | 40 | #undef min |
87e6d782 | 41 | #define min(a,b) ((a) < (b) ? (a) : (b)) |
37111cc7 | 42 | #undef max |
87e6d782 NC |
43 | #define max(a,b) ((a) > (b) ? (a) : (b)) |
44 | ||
45 | static const char * parse_insn_normal | |
46 | PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *)); | |
47 | \f | |
37111cc7 | 48 | /* -- assembler routines inserted here. */ |
87e6d782 NC |
49 | |
50 | /* -- asm.c */ | |
51 | ||
52 | #define CGEN_VERBOSE_ASSEMBLER_ERRORS | |
53 | ||
0e2ee3ca NC |
54 | static const char * parse_hi16 |
55 | PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *)); | |
56 | static const char * parse_lo16 | |
57 | PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *)); | |
58 | ||
87e6d782 NC |
59 | long |
60 | openrisc_sign_extend_16bit (value) | |
61 | long value; | |
62 | { | |
63 | return (long) (short) value; | |
64 | } | |
65 | ||
87e6d782 NC |
66 | /* Handle hi(). */ |
67 | ||
68 | static const char * | |
69 | parse_hi16 (cd, strp, opindex, valuep) | |
70 | CGEN_CPU_DESC cd; | |
71 | const char **strp; | |
72 | int opindex; | |
73 | unsigned long *valuep; | |
74 | { | |
75 | const char *errmsg; | |
76 | enum cgen_parse_operand_result result_type; | |
77 | bfd_vma value; | |
78 | ||
79 | if (**strp == '#') | |
80 | ++*strp; | |
81 | ||
82 | if (strncasecmp (*strp, "hi(", 3) == 0) | |
83 | { | |
84 | *strp += 3; | |
85 | ||
86 | #if 0 | |
87 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep); | |
88 | if (errmsg != NULL) | |
89 | fprintf (stderr, "parse_hi: %s\n", errmsg); | |
90 | if (errmsg != NULL) | |
91 | #endif | |
92 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16, | |
93 | &result_type, &value); | |
94 | if (**strp != ')') | |
95 | return "missing `)'"; | |
96 | ++*strp; | |
97 | if (errmsg == NULL | |
98 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
99 | value >>= 16; | |
100 | *valuep = (long) (short) value; | |
101 | ||
102 | return errmsg; | |
103 | } | |
104 | else | |
105 | { | |
106 | if (**strp == '-') | |
107 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, (long *) &value); | |
108 | else | |
2c8721ec | 109 | errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, (unsigned long *) &value); |
87e6d782 NC |
110 | } |
111 | *valuep = (long) (short) (value & 0xffff); | |
112 | return errmsg; | |
113 | } | |
114 | ||
0e2ee3ca | 115 | /* Handle lo(). */ |
87e6d782 NC |
116 | |
117 | static const char * | |
118 | parse_lo16 (cd, strp, opindex, valuep) | |
119 | CGEN_CPU_DESC cd; | |
120 | const char **strp; | |
121 | int opindex; | |
122 | unsigned long *valuep; | |
123 | { | |
124 | const char *errmsg; | |
125 | enum cgen_parse_operand_result result_type; | |
126 | bfd_vma value; | |
127 | ||
128 | if (**strp == '#') | |
129 | ++*strp; | |
130 | ||
131 | if (strncasecmp (*strp, "lo(", 3) == 0) | |
132 | { | |
133 | *strp += 3; | |
134 | ||
135 | #if 0 | |
136 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep); | |
137 | if (errmsg != NULL) | |
138 | fprintf (stderr, "parse_lo: %s\n", errmsg); | |
139 | ||
140 | if (errmsg != NULL) | |
141 | #endif | |
142 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16, | |
143 | &result_type, &value); | |
144 | if (**strp != ')') | |
145 | return "missing `)'"; | |
146 | ++*strp; | |
147 | if (errmsg == NULL | |
148 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
149 | value &= 0xffff; | |
150 | *valuep = (long) (short) value; | |
151 | ||
152 | return errmsg; | |
153 | } | |
154 | ||
155 | if (**strp == '-') | |
156 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, (long *) &value); | |
157 | else | |
2c8721ec | 158 | errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, (unsigned long *) &value); |
87e6d782 NC |
159 | *valuep = (long) (short) (value & 0xffff); |
160 | return errmsg; | |
161 | } | |
162 | ||
163 | /* -- */ | |
164 | ||
0e2ee3ca NC |
165 | const char * openrisc_cgen_parse_operand |
166 | PARAMS ((CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *)); | |
167 | ||
87e6d782 NC |
168 | /* Main entry point for operand parsing. |
169 | ||
170 | This function is basically just a big switch statement. Earlier versions | |
171 | used tables to look up the function to use, but | |
172 | - if the table contains both assembler and disassembler functions then | |
173 | the disassembler contains much of the assembler and vice-versa, | |
174 | - there's a lot of inlining possibilities as things grow, | |
175 | - using a switch statement avoids the function call overhead. | |
176 | ||
177 | This function could be moved into `parse_insn_normal', but keeping it | |
178 | separate makes clear the interface between `parse_insn_normal' and each of | |
179 | the handlers. | |
180 | */ | |
181 | ||
182 | const char * | |
183 | openrisc_cgen_parse_operand (cd, opindex, strp, fields) | |
184 | CGEN_CPU_DESC cd; | |
185 | int opindex; | |
186 | const char ** strp; | |
187 | CGEN_FIELDS * fields; | |
188 | { | |
189 | const char * errmsg = NULL; | |
190 | /* Used by scalar operands that still need to be parsed. */ | |
fc05c67f | 191 | long junk ATTRIBUTE_UNUSED; |
87e6d782 NC |
192 | |
193 | switch (opindex) | |
194 | { | |
195 | case OPENRISC_OPERAND_ABS_26 : | |
196 | { | |
197 | bfd_vma value; | |
198 | errmsg = cgen_parse_address (cd, strp, OPENRISC_OPERAND_ABS_26, 0, NULL, & value); | |
199 | fields->f_abs26 = value; | |
200 | } | |
201 | break; | |
202 | case OPENRISC_OPERAND_DISP_26 : | |
203 | { | |
204 | bfd_vma value; | |
205 | errmsg = cgen_parse_address (cd, strp, OPENRISC_OPERAND_DISP_26, 0, NULL, & value); | |
206 | fields->f_disp26 = value; | |
207 | } | |
208 | break; | |
209 | case OPENRISC_OPERAND_HI16 : | |
210 | errmsg = parse_hi16 (cd, strp, OPENRISC_OPERAND_HI16, &fields->f_simm16); | |
211 | break; | |
212 | case OPENRISC_OPERAND_LO16 : | |
213 | errmsg = parse_lo16 (cd, strp, OPENRISC_OPERAND_LO16, &fields->f_lo16); | |
214 | break; | |
215 | case OPENRISC_OPERAND_OP_F_23 : | |
216 | errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_OP_F_23, &fields->f_op4); | |
217 | break; | |
218 | case OPENRISC_OPERAND_OP_F_3 : | |
219 | errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_OP_F_3, &fields->f_op5); | |
220 | break; | |
221 | case OPENRISC_OPERAND_RA : | |
222 | errmsg = cgen_parse_keyword (cd, strp, & openrisc_cgen_opval_h_gr, & fields->f_r2); | |
223 | break; | |
224 | case OPENRISC_OPERAND_RB : | |
225 | errmsg = cgen_parse_keyword (cd, strp, & openrisc_cgen_opval_h_gr, & fields->f_r3); | |
226 | break; | |
227 | case OPENRISC_OPERAND_RD : | |
228 | errmsg = cgen_parse_keyword (cd, strp, & openrisc_cgen_opval_h_gr, & fields->f_r1); | |
229 | break; | |
230 | case OPENRISC_OPERAND_SIMM_16 : | |
231 | errmsg = cgen_parse_signed_integer (cd, strp, OPENRISC_OPERAND_SIMM_16, &fields->f_simm16); | |
232 | break; | |
233 | case OPENRISC_OPERAND_UI16NC : | |
234 | errmsg = parse_lo16 (cd, strp, OPENRISC_OPERAND_UI16NC, &fields->f_i16nc); | |
235 | break; | |
236 | case OPENRISC_OPERAND_UIMM_16 : | |
237 | errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_UIMM_16, &fields->f_uimm16); | |
238 | break; | |
239 | case OPENRISC_OPERAND_UIMM_5 : | |
240 | errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_UIMM_5, &fields->f_uimm5); | |
241 | break; | |
242 | ||
243 | default : | |
244 | /* xgettext:c-format */ | |
245 | fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex); | |
246 | abort (); | |
247 | } | |
248 | ||
249 | return errmsg; | |
250 | } | |
251 | ||
252 | cgen_parse_fn * const openrisc_cgen_parse_handlers[] = | |
253 | { | |
254 | parse_insn_normal, | |
255 | }; | |
256 | ||
257 | void | |
258 | openrisc_cgen_init_asm (cd) | |
259 | CGEN_CPU_DESC cd; | |
260 | { | |
261 | openrisc_cgen_init_opcode_table (cd); | |
262 | openrisc_cgen_init_ibld_table (cd); | |
263 | cd->parse_handlers = & openrisc_cgen_parse_handlers[0]; | |
264 | cd->parse_operand = openrisc_cgen_parse_operand; | |
265 | } | |
266 | ||
fc7bc883 RH |
267 | \f |
268 | ||
37111cc7 | 269 | /* Regex construction routine. |
fc7bc883 | 270 | |
37111cc7 NC |
271 | This translates an opcode syntax string into a regex string, |
272 | by replacing any non-character syntax element (such as an | |
273 | opcode) with the pattern '.*' | |
fc7bc883 | 274 | |
37111cc7 NC |
275 | It then compiles the regex and stores it in the opcode, for |
276 | later use by openrisc_cgen_assemble_insn | |
fc7bc883 | 277 | |
37111cc7 | 278 | Returns NULL for success, an error message for failure. */ |
fc7bc883 RH |
279 | |
280 | char * | |
281 | openrisc_cgen_build_insn_regex (insn) | |
282 | CGEN_INSN *insn; | |
283 | { | |
fc05c67f | 284 | CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn); |
fc7bc883 | 285 | const char *mnem = CGEN_INSN_MNEMONIC (insn); |
fc7bc883 RH |
286 | char rxbuf[CGEN_MAX_RX_ELEMENTS]; |
287 | char *rx = rxbuf; | |
288 | const CGEN_SYNTAX_CHAR_TYPE *syn; | |
289 | int reg_err; | |
290 | ||
291 | syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc)); | |
292 | ||
f3a55c17 NC |
293 | /* Mnemonics come first in the syntax string. */ |
294 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) | |
295 | return _("missing mnemonic in syntax string"); | |
fc7bc883 RH |
296 | ++syn; |
297 | ||
f3a55c17 NC |
298 | /* Generate a case sensitive regular expression that emulates case |
299 | insensitive matching in the "C" locale. We cannot generate a case | |
300 | insensitive regular expression because in Turkish locales, 'i' and 'I' | |
301 | are not equal modulo case conversion. */ | |
fc7bc883 | 302 | |
f3a55c17 NC |
303 | /* Copy the literal mnemonic out of the insn. */ |
304 | for (; *mnem; mnem++) | |
305 | { | |
306 | char c = *mnem; | |
307 | ||
308 | if (ISALPHA (c)) | |
309 | { | |
310 | *rx++ = '['; | |
311 | *rx++ = TOLOWER (c); | |
312 | *rx++ = TOUPPER (c); | |
313 | *rx++ = ']'; | |
314 | } | |
315 | else | |
316 | *rx++ = c; | |
317 | } | |
318 | ||
319 | /* Copy any remaining literals from the syntax string into the rx. */ | |
320 | for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn) | |
fc7bc883 RH |
321 | { |
322 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
323 | { | |
f3a55c17 NC |
324 | char c = CGEN_SYNTAX_CHAR (* syn); |
325 | ||
326 | switch (c) | |
327 | { | |
328 | /* Escape any regex metacharacters in the syntax. */ | |
329 | case '.': case '[': case '\\': | |
330 | case '*': case '^': case '$': | |
fc7bc883 RH |
331 | |
332 | #ifdef CGEN_ESCAPE_EXTENDED_REGEX | |
f3a55c17 NC |
333 | case '?': case '{': case '}': |
334 | case '(': case ')': case '*': | |
335 | case '|': case '+': case ']': | |
fc7bc883 | 336 | #endif |
f3a55c17 NC |
337 | *rx++ = '\\'; |
338 | *rx++ = c; | |
339 | break; | |
340 | ||
341 | default: | |
342 | if (ISALPHA (c)) | |
343 | { | |
344 | *rx++ = '['; | |
345 | *rx++ = TOLOWER (c); | |
346 | *rx++ = TOUPPER (c); | |
347 | *rx++ = ']'; | |
348 | } | |
349 | else | |
350 | *rx++ = c; | |
351 | break; | |
352 | } | |
fc7bc883 RH |
353 | } |
354 | else | |
355 | { | |
f3a55c17 NC |
356 | /* Replace non-syntax fields with globs. */ |
357 | *rx++ = '.'; | |
358 | *rx++ = '*'; | |
fc7bc883 RH |
359 | } |
360 | } | |
361 | ||
f3a55c17 | 362 | /* Trailing whitespace ok. */ |
fc7bc883 RH |
363 | * rx++ = '['; |
364 | * rx++ = ' '; | |
365 | * rx++ = '\t'; | |
366 | * rx++ = ']'; | |
367 | * rx++ = '*'; | |
368 | ||
f3a55c17 | 369 | /* But anchor it after that. */ |
fc7bc883 RH |
370 | * rx++ = '$'; |
371 | * rx = '\0'; | |
372 | ||
373 | CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t)); | |
f3a55c17 | 374 | reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB); |
fc7bc883 RH |
375 | |
376 | if (reg_err == 0) | |
377 | return NULL; | |
378 | else | |
379 | { | |
380 | static char msg[80]; | |
f3a55c17 | 381 | |
fc7bc883 RH |
382 | regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80); |
383 | regfree ((regex_t *) CGEN_INSN_RX (insn)); | |
384 | free (CGEN_INSN_RX (insn)); | |
385 | (CGEN_INSN_RX (insn)) = NULL; | |
37111cc7 | 386 | return msg; |
fc7bc883 RH |
387 | } |
388 | } | |
389 | ||
87e6d782 NC |
390 | \f |
391 | /* Default insn parser. | |
392 | ||
393 | The syntax string is scanned and operands are parsed and stored in FIELDS. | |
394 | Relocs are queued as we go via other callbacks. | |
395 | ||
396 | ??? Note that this is currently an all-or-nothing parser. If we fail to | |
397 | parse the instruction, we return 0 and the caller will start over from | |
398 | the beginning. Backtracking will be necessary in parsing subexpressions, | |
399 | but that can be handled there. Not handling backtracking here may get | |
400 | expensive in the case of the m68k. Deal with later. | |
401 | ||
f3a55c17 | 402 | Returns NULL for success, an error message for failure. */ |
87e6d782 NC |
403 | |
404 | static const char * | |
405 | parse_insn_normal (cd, insn, strp, fields) | |
406 | CGEN_CPU_DESC cd; | |
407 | const CGEN_INSN *insn; | |
408 | const char **strp; | |
409 | CGEN_FIELDS *fields; | |
410 | { | |
411 | /* ??? Runtime added insns not handled yet. */ | |
412 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
413 | const char *str = *strp; | |
414 | const char *errmsg; | |
415 | const char *p; | |
416 | const CGEN_SYNTAX_CHAR_TYPE * syn; | |
417 | #ifdef CGEN_MNEMONIC_OPERANDS | |
418 | /* FIXME: wip */ | |
419 | int past_opcode_p; | |
420 | #endif | |
421 | ||
422 | /* For now we assume the mnemonic is first (there are no leading operands). | |
423 | We can parse it without needing to set up operand parsing. | |
424 | GAS's input scrubber will ensure mnemonics are lowercase, but we may | |
425 | not be called from GAS. */ | |
426 | p = CGEN_INSN_MNEMONIC (insn); | |
37111cc7 | 427 | while (*p && TOLOWER (*p) == TOLOWER (*str)) |
87e6d782 NC |
428 | ++p, ++str; |
429 | ||
430 | if (* p) | |
431 | return _("unrecognized instruction"); | |
432 | ||
433 | #ifndef CGEN_MNEMONIC_OPERANDS | |
37111cc7 | 434 | if (* str && ! ISSPACE (* str)) |
87e6d782 NC |
435 | return _("unrecognized instruction"); |
436 | #endif | |
437 | ||
438 | CGEN_INIT_PARSE (cd); | |
439 | cgen_init_parse_operand (cd); | |
440 | #ifdef CGEN_MNEMONIC_OPERANDS | |
441 | past_opcode_p = 0; | |
442 | #endif | |
443 | ||
444 | /* We don't check for (*str != '\0') here because we want to parse | |
445 | any trailing fake arguments in the syntax string. */ | |
446 | syn = CGEN_SYNTAX_STRING (syntax); | |
447 | ||
448 | /* Mnemonics come first for now, ensure valid string. */ | |
449 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) | |
450 | abort (); | |
451 | ||
452 | ++syn; | |
453 | ||
454 | while (* syn != 0) | |
455 | { | |
456 | /* Non operand chars must match exactly. */ | |
457 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
458 | { | |
459 | /* FIXME: While we allow for non-GAS callers above, we assume the | |
460 | first char after the mnemonic part is a space. */ | |
461 | /* FIXME: We also take inappropriate advantage of the fact that | |
462 | GAS's input scrubber will remove extraneous blanks. */ | |
37111cc7 | 463 | if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn))) |
87e6d782 NC |
464 | { |
465 | #ifdef CGEN_MNEMONIC_OPERANDS | |
466 | if (CGEN_SYNTAX_CHAR(* syn) == ' ') | |
467 | past_opcode_p = 1; | |
468 | #endif | |
469 | ++ syn; | |
470 | ++ str; | |
471 | } | |
472 | else if (*str) | |
473 | { | |
474 | /* Syntax char didn't match. Can't be this insn. */ | |
475 | static char msg [80]; | |
f3a55c17 | 476 | |
87e6d782 NC |
477 | /* xgettext:c-format */ |
478 | sprintf (msg, _("syntax error (expected char `%c', found `%c')"), | |
479 | CGEN_SYNTAX_CHAR(*syn), *str); | |
480 | return msg; | |
481 | } | |
482 | else | |
483 | { | |
484 | /* Ran out of input. */ | |
485 | static char msg [80]; | |
f3a55c17 | 486 | |
87e6d782 NC |
487 | /* xgettext:c-format */ |
488 | sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), | |
489 | CGEN_SYNTAX_CHAR(*syn)); | |
490 | return msg; | |
491 | } | |
492 | continue; | |
493 | } | |
494 | ||
495 | /* We have an operand of some sort. */ | |
496 | errmsg = openrisc_cgen_parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), | |
497 | &str, fields); | |
498 | if (errmsg) | |
499 | return errmsg; | |
500 | ||
501 | /* Done with this operand, continue with next one. */ | |
502 | ++ syn; | |
503 | } | |
504 | ||
505 | /* If we're at the end of the syntax string, we're done. */ | |
506 | if (* syn == 0) | |
507 | { | |
508 | /* FIXME: For the moment we assume a valid `str' can only contain | |
509 | blanks now. IE: We needn't try again with a longer version of | |
510 | the insn and it is assumed that longer versions of insns appear | |
511 | before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ | |
37111cc7 | 512 | while (ISSPACE (* str)) |
87e6d782 NC |
513 | ++ str; |
514 | ||
515 | if (* str != '\0') | |
516 | return _("junk at end of line"); /* FIXME: would like to include `str' */ | |
517 | ||
518 | return NULL; | |
519 | } | |
520 | ||
521 | /* We couldn't parse it. */ | |
522 | return _("unrecognized instruction"); | |
523 | } | |
524 | \f | |
525 | /* Main entry point. | |
526 | This routine is called for each instruction to be assembled. | |
527 | STR points to the insn to be assembled. | |
528 | We assume all necessary tables have been initialized. | |
529 | The assembled instruction, less any fixups, is stored in BUF. | |
530 | Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value | |
531 | still needs to be converted to target byte order, otherwise BUF is an array | |
532 | of bytes in target byte order. | |
533 | The result is a pointer to the insn's entry in the opcode table, | |
534 | or NULL if an error occured (an error message will have already been | |
535 | printed). | |
536 | ||
537 | Note that when processing (non-alias) macro-insns, | |
538 | this function recurses. | |
539 | ||
540 | ??? It's possible to make this cpu-independent. | |
541 | One would have to deal with a few minor things. | |
542 | At this point in time doing so would be more of a curiosity than useful | |
543 | [for example this file isn't _that_ big], but keeping the possibility in | |
544 | mind helps keep the design clean. */ | |
545 | ||
546 | const CGEN_INSN * | |
547 | openrisc_cgen_assemble_insn (cd, str, fields, buf, errmsg) | |
548 | CGEN_CPU_DESC cd; | |
549 | const char *str; | |
550 | CGEN_FIELDS *fields; | |
551 | CGEN_INSN_BYTES_PTR buf; | |
552 | char **errmsg; | |
553 | { | |
554 | const char *start; | |
555 | CGEN_INSN_LIST *ilist; | |
556 | const char *parse_errmsg = NULL; | |
557 | const char *insert_errmsg = NULL; | |
fc7bc883 | 558 | int recognized_mnemonic = 0; |
87e6d782 NC |
559 | |
560 | /* Skip leading white space. */ | |
37111cc7 | 561 | while (ISSPACE (* str)) |
87e6d782 NC |
562 | ++ str; |
563 | ||
564 | /* The instructions are stored in hashed lists. | |
565 | Get the first in the list. */ | |
566 | ilist = CGEN_ASM_LOOKUP_INSN (cd, str); | |
567 | ||
568 | /* Keep looking until we find a match. */ | |
87e6d782 NC |
569 | start = str; |
570 | for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) | |
571 | { | |
572 | const CGEN_INSN *insn = ilist->insn; | |
fc7bc883 | 573 | recognized_mnemonic = 1; |
87e6d782 NC |
574 | |
575 | #ifdef CGEN_VALIDATE_INSN_SUPPORTED | |
f3a55c17 NC |
576 | /* Not usually needed as unsupported opcodes |
577 | shouldn't be in the hash lists. */ | |
87e6d782 NC |
578 | /* Is this insn supported by the selected cpu? */ |
579 | if (! openrisc_cgen_insn_supported (cd, insn)) | |
580 | continue; | |
581 | #endif | |
87e6d782 NC |
582 | /* If the RELAX attribute is set, this is an insn that shouldn't be |
583 | chosen immediately. Instead, it is used during assembler/linker | |
584 | relaxation if possible. */ | |
585 | if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX) != 0) | |
586 | continue; | |
587 | ||
588 | str = start; | |
589 | ||
f3a55c17 | 590 | /* Skip this insn if str doesn't look right lexically. */ |
fc7bc883 RH |
591 | if (CGEN_INSN_RX (insn) != NULL && |
592 | regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH) | |
593 | continue; | |
594 | ||
87e6d782 NC |
595 | /* Allow parse/insert handlers to obtain length of insn. */ |
596 | CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); | |
597 | ||
598 | parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); | |
599 | if (parse_errmsg != NULL) | |
600 | continue; | |
601 | ||
f3a55c17 | 602 | /* ??? 0 is passed for `pc'. */ |
87e6d782 NC |
603 | insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, |
604 | (bfd_vma) 0); | |
605 | if (insert_errmsg != NULL) | |
606 | continue; | |
607 | ||
608 | /* It is up to the caller to actually output the insn and any | |
609 | queued relocs. */ | |
610 | return insn; | |
611 | } | |
612 | ||
613 | { | |
614 | static char errbuf[150]; | |
615 | #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS | |
616 | const char *tmp_errmsg; | |
617 | ||
618 | /* If requesting verbose error messages, use insert_errmsg. | |
f3a55c17 | 619 | Failing that, use parse_errmsg. */ |
87e6d782 NC |
620 | tmp_errmsg = (insert_errmsg ? insert_errmsg : |
621 | parse_errmsg ? parse_errmsg : | |
f3a55c17 NC |
622 | recognized_mnemonic ? |
623 | _("unrecognized form of instruction") : | |
87e6d782 NC |
624 | _("unrecognized instruction")); |
625 | ||
626 | if (strlen (start) > 50) | |
627 | /* xgettext:c-format */ | |
628 | sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); | |
629 | else | |
630 | /* xgettext:c-format */ | |
631 | sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); | |
632 | #else | |
633 | if (strlen (start) > 50) | |
634 | /* xgettext:c-format */ | |
635 | sprintf (errbuf, _("bad instruction `%.50s...'"), start); | |
636 | else | |
637 | /* xgettext:c-format */ | |
638 | sprintf (errbuf, _("bad instruction `%.50s'"), start); | |
639 | #endif | |
640 | ||
641 | *errmsg = errbuf; | |
642 | return NULL; | |
643 | } | |
644 | } | |
645 | \f | |
646 | #if 0 /* This calls back to GAS which we can't do without care. */ | |
647 | ||
648 | /* Record each member of OPVALS in the assembler's symbol table. | |
649 | This lets GAS parse registers for us. | |
650 | ??? Interesting idea but not currently used. */ | |
651 | ||
652 | /* Record each member of OPVALS in the assembler's symbol table. | |
653 | FIXME: Not currently used. */ | |
654 | ||
655 | void | |
656 | openrisc_cgen_asm_hash_keywords (cd, opvals) | |
657 | CGEN_CPU_DESC cd; | |
658 | CGEN_KEYWORD *opvals; | |
659 | { | |
660 | CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL); | |
661 | const CGEN_KEYWORD_ENTRY * ke; | |
662 | ||
663 | while ((ke = cgen_keyword_search_next (& search)) != NULL) | |
664 | { | |
665 | #if 0 /* Unnecessary, should be done in the search routine. */ | |
666 | if (! openrisc_cgen_opval_supported (ke)) | |
667 | continue; | |
668 | #endif | |
669 | cgen_asm_record_register (cd, ke->name, ke->value); | |
670 | } | |
671 | } | |
672 | ||
673 | #endif /* 0 */ |