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., | |
f4321104 | 23 | 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
87e6d782 NC |
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 | |
ffead7ae | 46 | (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *); |
87e6d782 | 47 | \f |
37111cc7 | 48 | /* -- assembler routines inserted here. */ |
87e6d782 NC |
49 | |
50 | /* -- asm.c */ | |
51 | ||
52 | #define CGEN_VERBOSE_ASSEMBLER_ERRORS | |
53 | ||
0e2ee3ca | 54 | static const char * parse_hi16 |
33b71eeb | 55 | PARAMS ((CGEN_CPU_DESC, const char **, int, long *)); |
0e2ee3ca | 56 | static const char * parse_lo16 |
33b71eeb | 57 | PARAMS ((CGEN_CPU_DESC, const char **, int, long *)); |
0e2ee3ca | 58 | |
87e6d782 NC |
59 | long |
60 | openrisc_sign_extend_16bit (value) | |
61 | long value; | |
62 | { | |
8f807746 | 63 | return ((value & 0xffff) ^ 0x8000) - 0x8000; |
87e6d782 NC |
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; | |
33b71eeb | 73 | long *valuep; |
87e6d782 NC |
74 | { |
75 | const char *errmsg; | |
76 | enum cgen_parse_operand_result result_type; | |
8f807746 | 77 | unsigned long ret; |
87e6d782 NC |
78 | |
79 | if (**strp == '#') | |
80 | ++*strp; | |
81 | ||
82 | if (strncasecmp (*strp, "hi(", 3) == 0) | |
83 | { | |
8f807746 | 84 | bfd_vma value; |
87e6d782 | 85 | |
8f807746 | 86 | *strp += 3; |
33b71eeb | 87 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16, |
87e6d782 NC |
88 | &result_type, &value); |
89 | if (**strp != ')') | |
8f807746 AM |
90 | return _("missing `)'"); |
91 | ||
87e6d782 NC |
92 | ++*strp; |
93 | if (errmsg == NULL | |
94 | && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
95 | value >>= 16; | |
8f807746 | 96 | ret = value; |
87e6d782 NC |
97 | } |
98 | else | |
99 | { | |
100 | if (**strp == '-') | |
8f807746 AM |
101 | { |
102 | long value; | |
33b71eeb | 103 | |
8f807746 AM |
104 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, &value); |
105 | ret = value; | |
106 | } | |
87e6d782 | 107 | else |
8f807746 AM |
108 | { |
109 | unsigned long value; | |
33b71eeb | 110 | |
8f807746 AM |
111 | errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, &value); |
112 | ret = value; | |
113 | } | |
87e6d782 | 114 | } |
8f807746 AM |
115 | |
116 | *valuep = ((ret & 0xffff) ^ 0x8000) - 0x8000; | |
87e6d782 NC |
117 | return errmsg; |
118 | } | |
119 | ||
0e2ee3ca | 120 | /* Handle lo(). */ |
87e6d782 NC |
121 | |
122 | static const char * | |
123 | parse_lo16 (cd, strp, opindex, valuep) | |
124 | CGEN_CPU_DESC cd; | |
125 | const char **strp; | |
126 | int opindex; | |
33b71eeb | 127 | long *valuep; |
87e6d782 NC |
128 | { |
129 | const char *errmsg; | |
130 | enum cgen_parse_operand_result result_type; | |
8f807746 | 131 | unsigned long ret; |
87e6d782 NC |
132 | |
133 | if (**strp == '#') | |
134 | ++*strp; | |
135 | ||
136 | if (strncasecmp (*strp, "lo(", 3) == 0) | |
137 | { | |
8f807746 | 138 | bfd_vma value; |
87e6d782 | 139 | |
8f807746 | 140 | *strp += 3; |
33b71eeb NC |
141 | errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16, |
142 | &result_type, &value); | |
87e6d782 | 143 | if (**strp != ')') |
8f807746 | 144 | return _("missing `)'"); |
87e6d782 | 145 | |
8f807746 AM |
146 | ++*strp; |
147 | ret = value; | |
87e6d782 | 148 | } |
87e6d782 | 149 | else |
8f807746 AM |
150 | { |
151 | if (**strp == '-') | |
152 | { | |
153 | long value; | |
33b71eeb | 154 | |
8f807746 AM |
155 | errmsg = cgen_parse_signed_integer (cd, strp, opindex, &value); |
156 | ret = value; | |
157 | } | |
158 | else | |
159 | { | |
160 | unsigned long value; | |
33b71eeb | 161 | |
8f807746 AM |
162 | errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, &value); |
163 | ret = value; | |
164 | } | |
165 | } | |
166 | ||
167 | *valuep = ((ret & 0xffff) ^ 0x8000) - 0x8000; | |
87e6d782 NC |
168 | return errmsg; |
169 | } | |
170 | ||
171 | /* -- */ | |
172 | ||
0e2ee3ca NC |
173 | const char * openrisc_cgen_parse_operand |
174 | PARAMS ((CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *)); | |
175 | ||
87e6d782 NC |
176 | /* Main entry point for operand parsing. |
177 | ||
178 | This function is basically just a big switch statement. Earlier versions | |
179 | used tables to look up the function to use, but | |
180 | - if the table contains both assembler and disassembler functions then | |
181 | the disassembler contains much of the assembler and vice-versa, | |
182 | - there's a lot of inlining possibilities as things grow, | |
183 | - using a switch statement avoids the function call overhead. | |
184 | ||
185 | This function could be moved into `parse_insn_normal', but keeping it | |
186 | separate makes clear the interface between `parse_insn_normal' and each of | |
9a2e995d | 187 | the handlers. */ |
87e6d782 NC |
188 | |
189 | const char * | |
190 | openrisc_cgen_parse_operand (cd, opindex, strp, fields) | |
191 | CGEN_CPU_DESC cd; | |
192 | int opindex; | |
193 | const char ** strp; | |
194 | CGEN_FIELDS * fields; | |
195 | { | |
196 | const char * errmsg = NULL; | |
197 | /* Used by scalar operands that still need to be parsed. */ | |
fc05c67f | 198 | long junk ATTRIBUTE_UNUSED; |
87e6d782 NC |
199 | |
200 | switch (opindex) | |
201 | { | |
202 | case OPENRISC_OPERAND_ABS_26 : | |
203 | { | |
9494d739 | 204 | bfd_vma value = 0; |
87e6d782 NC |
205 | errmsg = cgen_parse_address (cd, strp, OPENRISC_OPERAND_ABS_26, 0, NULL, & value); |
206 | fields->f_abs26 = value; | |
207 | } | |
208 | break; | |
209 | case OPENRISC_OPERAND_DISP_26 : | |
210 | { | |
9494d739 | 211 | bfd_vma value = 0; |
87e6d782 NC |
212 | errmsg = cgen_parse_address (cd, strp, OPENRISC_OPERAND_DISP_26, 0, NULL, & value); |
213 | fields->f_disp26 = value; | |
214 | } | |
215 | break; | |
216 | case OPENRISC_OPERAND_HI16 : | |
33b71eeb | 217 | errmsg = parse_hi16 (cd, strp, OPENRISC_OPERAND_HI16, (long *) (& fields->f_simm16)); |
87e6d782 NC |
218 | break; |
219 | case OPENRISC_OPERAND_LO16 : | |
33b71eeb | 220 | errmsg = parse_lo16 (cd, strp, OPENRISC_OPERAND_LO16, (long *) (& fields->f_lo16)); |
87e6d782 NC |
221 | break; |
222 | case OPENRISC_OPERAND_OP_F_23 : | |
33b71eeb | 223 | errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_OP_F_23, (unsigned long *) (& fields->f_op4)); |
87e6d782 NC |
224 | break; |
225 | case OPENRISC_OPERAND_OP_F_3 : | |
33b71eeb | 226 | errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_OP_F_3, (unsigned long *) (& fields->f_op5)); |
87e6d782 NC |
227 | break; |
228 | case OPENRISC_OPERAND_RA : | |
229 | errmsg = cgen_parse_keyword (cd, strp, & openrisc_cgen_opval_h_gr, & fields->f_r2); | |
230 | break; | |
231 | case OPENRISC_OPERAND_RB : | |
232 | errmsg = cgen_parse_keyword (cd, strp, & openrisc_cgen_opval_h_gr, & fields->f_r3); | |
233 | break; | |
234 | case OPENRISC_OPERAND_RD : | |
235 | errmsg = cgen_parse_keyword (cd, strp, & openrisc_cgen_opval_h_gr, & fields->f_r1); | |
236 | break; | |
237 | case OPENRISC_OPERAND_SIMM_16 : | |
33b71eeb | 238 | errmsg = cgen_parse_signed_integer (cd, strp, OPENRISC_OPERAND_SIMM_16, (long *) (& fields->f_simm16)); |
87e6d782 NC |
239 | break; |
240 | case OPENRISC_OPERAND_UI16NC : | |
33b71eeb | 241 | errmsg = parse_lo16 (cd, strp, OPENRISC_OPERAND_UI16NC, (long *) (& fields->f_i16nc)); |
87e6d782 NC |
242 | break; |
243 | case OPENRISC_OPERAND_UIMM_16 : | |
33b71eeb | 244 | errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_UIMM_16, (unsigned long *) (& fields->f_uimm16)); |
87e6d782 NC |
245 | break; |
246 | case OPENRISC_OPERAND_UIMM_5 : | |
33b71eeb | 247 | errmsg = cgen_parse_unsigned_integer (cd, strp, OPENRISC_OPERAND_UIMM_5, (unsigned long *) (& fields->f_uimm5)); |
87e6d782 NC |
248 | break; |
249 | ||
250 | default : | |
251 | /* xgettext:c-format */ | |
252 | fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex); | |
253 | abort (); | |
254 | } | |
255 | ||
256 | return errmsg; | |
257 | } | |
258 | ||
259 | cgen_parse_fn * const openrisc_cgen_parse_handlers[] = | |
260 | { | |
261 | parse_insn_normal, | |
262 | }; | |
263 | ||
264 | void | |
265 | openrisc_cgen_init_asm (cd) | |
266 | CGEN_CPU_DESC cd; | |
267 | { | |
268 | openrisc_cgen_init_opcode_table (cd); | |
269 | openrisc_cgen_init_ibld_table (cd); | |
270 | cd->parse_handlers = & openrisc_cgen_parse_handlers[0]; | |
271 | cd->parse_operand = openrisc_cgen_parse_operand; | |
272 | } | |
273 | ||
fc7bc883 RH |
274 | \f |
275 | ||
37111cc7 | 276 | /* Regex construction routine. |
fc7bc883 | 277 | |
37111cc7 NC |
278 | This translates an opcode syntax string into a regex string, |
279 | by replacing any non-character syntax element (such as an | |
280 | opcode) with the pattern '.*' | |
fc7bc883 | 281 | |
37111cc7 NC |
282 | It then compiles the regex and stores it in the opcode, for |
283 | later use by openrisc_cgen_assemble_insn | |
fc7bc883 | 284 | |
37111cc7 | 285 | Returns NULL for success, an error message for failure. */ |
fc7bc883 RH |
286 | |
287 | char * | |
ffead7ae | 288 | openrisc_cgen_build_insn_regex (CGEN_INSN *insn) |
fc7bc883 | 289 | { |
fc05c67f | 290 | CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn); |
fc7bc883 | 291 | const char *mnem = CGEN_INSN_MNEMONIC (insn); |
fc7bc883 RH |
292 | char rxbuf[CGEN_MAX_RX_ELEMENTS]; |
293 | char *rx = rxbuf; | |
294 | const CGEN_SYNTAX_CHAR_TYPE *syn; | |
295 | int reg_err; | |
296 | ||
297 | syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc)); | |
298 | ||
f3a55c17 NC |
299 | /* Mnemonics come first in the syntax string. */ |
300 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) | |
301 | return _("missing mnemonic in syntax string"); | |
fc7bc883 RH |
302 | ++syn; |
303 | ||
f3a55c17 NC |
304 | /* Generate a case sensitive regular expression that emulates case |
305 | insensitive matching in the "C" locale. We cannot generate a case | |
306 | insensitive regular expression because in Turkish locales, 'i' and 'I' | |
307 | are not equal modulo case conversion. */ | |
fc7bc883 | 308 | |
f3a55c17 NC |
309 | /* Copy the literal mnemonic out of the insn. */ |
310 | for (; *mnem; mnem++) | |
311 | { | |
312 | char c = *mnem; | |
313 | ||
314 | if (ISALPHA (c)) | |
315 | { | |
316 | *rx++ = '['; | |
317 | *rx++ = TOLOWER (c); | |
318 | *rx++ = TOUPPER (c); | |
319 | *rx++ = ']'; | |
320 | } | |
321 | else | |
322 | *rx++ = c; | |
323 | } | |
324 | ||
325 | /* Copy any remaining literals from the syntax string into the rx. */ | |
326 | for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn) | |
fc7bc883 RH |
327 | { |
328 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
329 | { | |
f3a55c17 NC |
330 | char c = CGEN_SYNTAX_CHAR (* syn); |
331 | ||
332 | switch (c) | |
333 | { | |
334 | /* Escape any regex metacharacters in the syntax. */ | |
335 | case '.': case '[': case '\\': | |
336 | case '*': case '^': case '$': | |
fc7bc883 RH |
337 | |
338 | #ifdef CGEN_ESCAPE_EXTENDED_REGEX | |
f3a55c17 NC |
339 | case '?': case '{': case '}': |
340 | case '(': case ')': case '*': | |
341 | case '|': case '+': case ']': | |
fc7bc883 | 342 | #endif |
f3a55c17 NC |
343 | *rx++ = '\\'; |
344 | *rx++ = c; | |
345 | break; | |
346 | ||
347 | default: | |
348 | if (ISALPHA (c)) | |
349 | { | |
350 | *rx++ = '['; | |
351 | *rx++ = TOLOWER (c); | |
352 | *rx++ = TOUPPER (c); | |
353 | *rx++ = ']'; | |
354 | } | |
355 | else | |
356 | *rx++ = c; | |
357 | break; | |
358 | } | |
fc7bc883 RH |
359 | } |
360 | else | |
361 | { | |
f3a55c17 NC |
362 | /* Replace non-syntax fields with globs. */ |
363 | *rx++ = '.'; | |
364 | *rx++ = '*'; | |
fc7bc883 RH |
365 | } |
366 | } | |
367 | ||
f3a55c17 | 368 | /* Trailing whitespace ok. */ |
fc7bc883 RH |
369 | * rx++ = '['; |
370 | * rx++ = ' '; | |
371 | * rx++ = '\t'; | |
372 | * rx++ = ']'; | |
373 | * rx++ = '*'; | |
374 | ||
f3a55c17 | 375 | /* But anchor it after that. */ |
fc7bc883 RH |
376 | * rx++ = '$'; |
377 | * rx = '\0'; | |
378 | ||
379 | CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t)); | |
f3a55c17 | 380 | reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB); |
fc7bc883 RH |
381 | |
382 | if (reg_err == 0) | |
383 | return NULL; | |
384 | else | |
385 | { | |
386 | static char msg[80]; | |
f3a55c17 | 387 | |
fc7bc883 RH |
388 | regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80); |
389 | regfree ((regex_t *) CGEN_INSN_RX (insn)); | |
390 | free (CGEN_INSN_RX (insn)); | |
391 | (CGEN_INSN_RX (insn)) = NULL; | |
37111cc7 | 392 | return msg; |
fc7bc883 RH |
393 | } |
394 | } | |
395 | ||
87e6d782 NC |
396 | \f |
397 | /* Default insn parser. | |
398 | ||
399 | The syntax string is scanned and operands are parsed and stored in FIELDS. | |
400 | Relocs are queued as we go via other callbacks. | |
401 | ||
402 | ??? Note that this is currently an all-or-nothing parser. If we fail to | |
403 | parse the instruction, we return 0 and the caller will start over from | |
404 | the beginning. Backtracking will be necessary in parsing subexpressions, | |
405 | but that can be handled there. Not handling backtracking here may get | |
406 | expensive in the case of the m68k. Deal with later. | |
407 | ||
f3a55c17 | 408 | Returns NULL for success, an error message for failure. */ |
87e6d782 NC |
409 | |
410 | static const char * | |
ffead7ae MM |
411 | parse_insn_normal (CGEN_CPU_DESC cd, |
412 | const CGEN_INSN *insn, | |
413 | const char **strp, | |
414 | CGEN_FIELDS *fields) | |
87e6d782 NC |
415 | { |
416 | /* ??? Runtime added insns not handled yet. */ | |
417 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
418 | const char *str = *strp; | |
419 | const char *errmsg; | |
420 | const char *p; | |
421 | const CGEN_SYNTAX_CHAR_TYPE * syn; | |
422 | #ifdef CGEN_MNEMONIC_OPERANDS | |
423 | /* FIXME: wip */ | |
424 | int past_opcode_p; | |
425 | #endif | |
426 | ||
427 | /* For now we assume the mnemonic is first (there are no leading operands). | |
428 | We can parse it without needing to set up operand parsing. | |
429 | GAS's input scrubber will ensure mnemonics are lowercase, but we may | |
430 | not be called from GAS. */ | |
431 | p = CGEN_INSN_MNEMONIC (insn); | |
37111cc7 | 432 | while (*p && TOLOWER (*p) == TOLOWER (*str)) |
87e6d782 NC |
433 | ++p, ++str; |
434 | ||
435 | if (* p) | |
436 | return _("unrecognized instruction"); | |
437 | ||
438 | #ifndef CGEN_MNEMONIC_OPERANDS | |
37111cc7 | 439 | if (* str && ! ISSPACE (* str)) |
87e6d782 NC |
440 | return _("unrecognized instruction"); |
441 | #endif | |
442 | ||
443 | CGEN_INIT_PARSE (cd); | |
444 | cgen_init_parse_operand (cd); | |
445 | #ifdef CGEN_MNEMONIC_OPERANDS | |
446 | past_opcode_p = 0; | |
447 | #endif | |
448 | ||
449 | /* We don't check for (*str != '\0') here because we want to parse | |
450 | any trailing fake arguments in the syntax string. */ | |
451 | syn = CGEN_SYNTAX_STRING (syntax); | |
452 | ||
453 | /* Mnemonics come first for now, ensure valid string. */ | |
454 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) | |
455 | abort (); | |
456 | ||
457 | ++syn; | |
458 | ||
459 | while (* syn != 0) | |
460 | { | |
461 | /* Non operand chars must match exactly. */ | |
462 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
463 | { | |
464 | /* FIXME: While we allow for non-GAS callers above, we assume the | |
465 | first char after the mnemonic part is a space. */ | |
466 | /* FIXME: We also take inappropriate advantage of the fact that | |
467 | GAS's input scrubber will remove extraneous blanks. */ | |
37111cc7 | 468 | if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn))) |
87e6d782 NC |
469 | { |
470 | #ifdef CGEN_MNEMONIC_OPERANDS | |
471 | if (CGEN_SYNTAX_CHAR(* syn) == ' ') | |
472 | past_opcode_p = 1; | |
473 | #endif | |
474 | ++ syn; | |
475 | ++ str; | |
476 | } | |
477 | else if (*str) | |
478 | { | |
479 | /* Syntax char didn't match. Can't be this insn. */ | |
480 | static char msg [80]; | |
f3a55c17 | 481 | |
87e6d782 NC |
482 | /* xgettext:c-format */ |
483 | sprintf (msg, _("syntax error (expected char `%c', found `%c')"), | |
484 | CGEN_SYNTAX_CHAR(*syn), *str); | |
485 | return msg; | |
486 | } | |
487 | else | |
488 | { | |
489 | /* Ran out of input. */ | |
490 | static char msg [80]; | |
f3a55c17 | 491 | |
87e6d782 NC |
492 | /* xgettext:c-format */ |
493 | sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), | |
494 | CGEN_SYNTAX_CHAR(*syn)); | |
495 | return msg; | |
496 | } | |
497 | continue; | |
498 | } | |
499 | ||
500 | /* We have an operand of some sort. */ | |
a978a3e5 | 501 | errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), |
87e6d782 NC |
502 | &str, fields); |
503 | if (errmsg) | |
504 | return errmsg; | |
505 | ||
506 | /* Done with this operand, continue with next one. */ | |
507 | ++ syn; | |
508 | } | |
509 | ||
510 | /* If we're at the end of the syntax string, we're done. */ | |
511 | if (* syn == 0) | |
512 | { | |
513 | /* FIXME: For the moment we assume a valid `str' can only contain | |
514 | blanks now. IE: We needn't try again with a longer version of | |
515 | the insn and it is assumed that longer versions of insns appear | |
516 | before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ | |
37111cc7 | 517 | while (ISSPACE (* str)) |
87e6d782 NC |
518 | ++ str; |
519 | ||
520 | if (* str != '\0') | |
521 | return _("junk at end of line"); /* FIXME: would like to include `str' */ | |
522 | ||
523 | return NULL; | |
524 | } | |
525 | ||
526 | /* We couldn't parse it. */ | |
527 | return _("unrecognized instruction"); | |
528 | } | |
529 | \f | |
530 | /* Main entry point. | |
531 | This routine is called for each instruction to be assembled. | |
532 | STR points to the insn to be assembled. | |
533 | We assume all necessary tables have been initialized. | |
534 | The assembled instruction, less any fixups, is stored in BUF. | |
535 | Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value | |
536 | still needs to be converted to target byte order, otherwise BUF is an array | |
537 | of bytes in target byte order. | |
538 | The result is a pointer to the insn's entry in the opcode table, | |
539 | or NULL if an error occured (an error message will have already been | |
540 | printed). | |
541 | ||
542 | Note that when processing (non-alias) macro-insns, | |
543 | this function recurses. | |
544 | ||
545 | ??? It's possible to make this cpu-independent. | |
546 | One would have to deal with a few minor things. | |
547 | At this point in time doing so would be more of a curiosity than useful | |
548 | [for example this file isn't _that_ big], but keeping the possibility in | |
549 | mind helps keep the design clean. */ | |
550 | ||
551 | const CGEN_INSN * | |
ffead7ae MM |
552 | openrisc_cgen_assemble_insn (CGEN_CPU_DESC cd, |
553 | const char *str, | |
554 | CGEN_FIELDS *fields, | |
555 | CGEN_INSN_BYTES_PTR buf, | |
556 | char **errmsg) | |
87e6d782 NC |
557 | { |
558 | const char *start; | |
559 | CGEN_INSN_LIST *ilist; | |
560 | const char *parse_errmsg = NULL; | |
561 | const char *insert_errmsg = NULL; | |
fc7bc883 | 562 | int recognized_mnemonic = 0; |
87e6d782 NC |
563 | |
564 | /* Skip leading white space. */ | |
37111cc7 | 565 | while (ISSPACE (* str)) |
87e6d782 NC |
566 | ++ str; |
567 | ||
568 | /* The instructions are stored in hashed lists. | |
569 | Get the first in the list. */ | |
570 | ilist = CGEN_ASM_LOOKUP_INSN (cd, str); | |
571 | ||
572 | /* Keep looking until we find a match. */ | |
87e6d782 NC |
573 | start = str; |
574 | for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) | |
575 | { | |
576 | const CGEN_INSN *insn = ilist->insn; | |
fc7bc883 | 577 | recognized_mnemonic = 1; |
87e6d782 NC |
578 | |
579 | #ifdef CGEN_VALIDATE_INSN_SUPPORTED | |
f3a55c17 NC |
580 | /* Not usually needed as unsupported opcodes |
581 | shouldn't be in the hash lists. */ | |
87e6d782 NC |
582 | /* Is this insn supported by the selected cpu? */ |
583 | if (! openrisc_cgen_insn_supported (cd, insn)) | |
584 | continue; | |
585 | #endif | |
b11dcf4e | 586 | /* If the RELAXED attribute is set, this is an insn that shouldn't be |
87e6d782 NC |
587 | chosen immediately. Instead, it is used during assembler/linker |
588 | relaxation if possible. */ | |
b11dcf4e | 589 | if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0) |
87e6d782 NC |
590 | continue; |
591 | ||
592 | str = start; | |
593 | ||
f3a55c17 | 594 | /* Skip this insn if str doesn't look right lexically. */ |
fc7bc883 RH |
595 | if (CGEN_INSN_RX (insn) != NULL && |
596 | regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH) | |
597 | continue; | |
598 | ||
87e6d782 NC |
599 | /* Allow parse/insert handlers to obtain length of insn. */ |
600 | CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); | |
601 | ||
602 | parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); | |
603 | if (parse_errmsg != NULL) | |
604 | continue; | |
605 | ||
f3a55c17 | 606 | /* ??? 0 is passed for `pc'. */ |
87e6d782 NC |
607 | insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, |
608 | (bfd_vma) 0); | |
609 | if (insert_errmsg != NULL) | |
610 | continue; | |
611 | ||
612 | /* It is up to the caller to actually output the insn and any | |
613 | queued relocs. */ | |
614 | return insn; | |
615 | } | |
616 | ||
617 | { | |
618 | static char errbuf[150]; | |
619 | #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS | |
620 | const char *tmp_errmsg; | |
621 | ||
622 | /* If requesting verbose error messages, use insert_errmsg. | |
f3a55c17 | 623 | Failing that, use parse_errmsg. */ |
87e6d782 NC |
624 | tmp_errmsg = (insert_errmsg ? insert_errmsg : |
625 | parse_errmsg ? parse_errmsg : | |
f3a55c17 NC |
626 | recognized_mnemonic ? |
627 | _("unrecognized form of instruction") : | |
87e6d782 NC |
628 | _("unrecognized instruction")); |
629 | ||
630 | if (strlen (start) > 50) | |
631 | /* xgettext:c-format */ | |
632 | sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); | |
633 | else | |
634 | /* xgettext:c-format */ | |
635 | sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); | |
636 | #else | |
637 | if (strlen (start) > 50) | |
638 | /* xgettext:c-format */ | |
639 | sprintf (errbuf, _("bad instruction `%.50s...'"), start); | |
640 | else | |
641 | /* xgettext:c-format */ | |
642 | sprintf (errbuf, _("bad instruction `%.50s'"), start); | |
643 | #endif | |
644 | ||
645 | *errmsg = errbuf; | |
646 | return NULL; | |
647 | } | |
648 | } | |
649 | \f | |
650 | #if 0 /* This calls back to GAS which we can't do without care. */ | |
651 | ||
652 | /* Record each member of OPVALS in the assembler's symbol table. | |
653 | This lets GAS parse registers for us. | |
654 | ??? Interesting idea but not currently used. */ | |
655 | ||
656 | /* Record each member of OPVALS in the assembler's symbol table. | |
657 | FIXME: Not currently used. */ | |
658 | ||
659 | void | |
ffead7ae | 660 | openrisc_cgen_asm_hash_keywords (CGEN_CPU_DESC cd, CGEN_KEYWORD *opvals) |
87e6d782 NC |
661 | { |
662 | CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL); | |
663 | const CGEN_KEYWORD_ENTRY * ke; | |
664 | ||
665 | while ((ke = cgen_keyword_search_next (& search)) != NULL) | |
666 | { | |
667 | #if 0 /* Unnecessary, should be done in the search routine. */ | |
668 | if (! openrisc_cgen_opval_supported (ke)) | |
669 | continue; | |
670 | #endif | |
671 | cgen_asm_record_register (cd, ke->name, ke->value); | |
672 | } | |
673 | } | |
674 | ||
675 | #endif /* 0 */ |