Commit | Line | Data |
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93fbbb04 GK |
1 | /* Assembler interface for targets using CGEN. -*- C -*- |
2 | CGEN: Cpu tools GENerator | |
3 | ||
47b0e7ad NC |
4 | THIS FILE IS MACHINE GENERATED WITH CGEN. |
5 | - the resultant file is machine generated, cgen-asm.in isn't | |
93fbbb04 | 6 | |
47b0e7ad NC |
7 | Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2005 |
8 | Free Software Foundation, Inc. | |
93fbbb04 | 9 | |
47b0e7ad | 10 | This file is part of the GNU Binutils and GDB, the GNU debugger. |
93fbbb04 | 11 | |
47b0e7ad NC |
12 | This program 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 2, or (at your option) | |
15 | any later version. | |
93fbbb04 | 16 | |
47b0e7ad NC |
17 | This program is distributed in the hope that it will be useful, |
18 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | GNU General Public License for more details. | |
93fbbb04 | 21 | |
47b0e7ad NC |
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. */ | |
93fbbb04 GK |
25 | |
26 | /* ??? Eventually more and more of this stuff can go to cpu-independent files. | |
27 | Keep that in mind. */ | |
28 | ||
29 | #include "sysdep.h" | |
30 | #include <stdio.h> | |
31 | #include "ansidecl.h" | |
32 | #include "bfd.h" | |
33 | #include "symcat.h" | |
34 | #include "xstormy16-desc.h" | |
35 | #include "xstormy16-opc.h" | |
36 | #include "opintl.h" | |
37 | #include "xregex.h" | |
38 | #include "libiberty.h" | |
39 | #include "safe-ctype.h" | |
40 | ||
41 | #undef min | |
42 | #define min(a,b) ((a) < (b) ? (a) : (b)) | |
43 | #undef max | |
44 | #define max(a,b) ((a) > (b) ? (a) : (b)) | |
45 | ||
46 | static const char * parse_insn_normal | |
ffead7ae | 47 | (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *); |
93fbbb04 GK |
48 | \f |
49 | /* -- assembler routines inserted here. */ | |
50 | ||
51 | /* -- asm.c */ | |
93fbbb04 GK |
52 | |
53 | /* The machine-independent code doesn't know how to disambiguate | |
54 | mov (foo),r3 | |
55 | and | |
56 | mov (r2),r3 | |
57 | where 'foo' is a label. This helps it out. */ | |
58 | ||
59 | static const char * | |
47b0e7ad NC |
60 | parse_mem8 (CGEN_CPU_DESC cd, |
61 | const char **strp, | |
62 | int opindex, | |
63 | unsigned long *valuep) | |
93fbbb04 GK |
64 | { |
65 | if (**strp == '(') | |
66 | { | |
67 | const char *s = *strp; | |
68 | ||
69 | if (s[1] == '-' && s[2] == '-') | |
70 | return _("Bad register in preincrement"); | |
71 | ||
98f70fc4 | 72 | while (ISALNUM (*++s)) |
93fbbb04 GK |
73 | ; |
74 | if (s[0] == '+' && s[1] == '+' && (s[2] == ')' || s[2] == ',')) | |
75 | return _("Bad register in postincrement"); | |
76 | if (s[0] == ',' || s[0] == ')') | |
77 | return _("Bad register name"); | |
78 | } | |
79 | else if (cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, | |
33b71eeb | 80 | (long *) valuep) == NULL) |
93fbbb04 GK |
81 | return _("Label conflicts with register name"); |
82 | else if (strncasecmp (*strp, "rx,", 3) == 0 | |
83 | || strncasecmp (*strp, "rxl,", 3) == 0 | |
84 | || strncasecmp (*strp, "rxh,", 3) == 0) | |
85 | return _("Label conflicts with `Rx'"); | |
86 | else if (**strp == '#') | |
87 | return _("Bad immediate expression"); | |
88 | ||
89 | return cgen_parse_unsigned_integer (cd, strp, opindex, valuep); | |
90 | } | |
91 | ||
92 | /* For the add and subtract instructions, there are two immediate forms, | |
93 | one for small operands and one for large ones. We want to use | |
94 | the small one when possible, but we do not want to generate relocs | |
95 | of the small size. This is somewhat tricky. */ | |
96 | ||
97 | static const char * | |
47b0e7ad NC |
98 | parse_small_immediate (CGEN_CPU_DESC cd, |
99 | const char **strp, | |
100 | int opindex, | |
101 | unsigned long *valuep) | |
93fbbb04 GK |
102 | { |
103 | bfd_vma value; | |
104 | enum cgen_parse_operand_result result; | |
105 | const char *errmsg; | |
106 | ||
c2617f40 DD |
107 | if (**strp == '@') |
108 | return _("No relocation for small immediate"); | |
109 | ||
93fbbb04 GK |
110 | errmsg = (* cd->parse_operand_fn) |
111 | (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE, | |
47b0e7ad | 112 | & result, & value); |
93fbbb04 GK |
113 | |
114 | if (errmsg) | |
115 | return errmsg; | |
116 | ||
117 | if (result != CGEN_PARSE_OPERAND_RESULT_NUMBER) | |
118 | return _("Small operand was not an immediate number"); | |
119 | ||
120 | *valuep = value; | |
121 | return NULL; | |
122 | } | |
c2617f40 | 123 | |
47b0e7ad | 124 | /* Literal scan be either a normal literal, a @hi() or @lo relocation. */ |
c2617f40 DD |
125 | |
126 | static const char * | |
47b0e7ad NC |
127 | parse_immediate16 (CGEN_CPU_DESC cd, |
128 | const char **strp, | |
129 | int opindex, | |
130 | unsigned long *valuep) | |
c2617f40 DD |
131 | { |
132 | const char *errmsg; | |
133 | enum cgen_parse_operand_result result; | |
134 | bfd_reloc_code_real_type code = BFD_RELOC_NONE; | |
135 | bfd_vma value; | |
136 | ||
137 | if (strncmp (*strp, "@hi(", 4) == 0) | |
138 | { | |
139 | *strp += 4; | |
140 | code = BFD_RELOC_HI16; | |
141 | } | |
142 | else | |
143 | if (strncmp (*strp, "@lo(", 4) == 0) | |
144 | { | |
145 | *strp += 4; | |
146 | code = BFD_RELOC_LO16; | |
147 | } | |
148 | ||
149 | if (code == BFD_RELOC_NONE) | |
150 | errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep); | |
151 | else | |
152 | { | |
153 | errmsg = cgen_parse_address (cd, strp, opindex, code, &result, &value); | |
154 | if ((errmsg == NULL) && | |
155 | (result != CGEN_PARSE_OPERAND_RESULT_QUEUED)) | |
156 | errmsg = _("Operand is not a symbol"); | |
157 | ||
158 | *valuep = value; | |
159 | if ((code == BFD_RELOC_HI16 || code == BFD_RELOC_LO16) | |
160 | && **strp == ')') | |
161 | *strp += 1; | |
162 | else | |
163 | { | |
164 | errmsg = _("Syntax error: No trailing ')'"); | |
165 | return errmsg; | |
166 | } | |
167 | } | |
168 | return errmsg; | |
169 | } | |
93fbbb04 GK |
170 | /* -- */ |
171 | ||
172 | const char * xstormy16_cgen_parse_operand | |
47b0e7ad | 173 | (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *); |
93fbbb04 GK |
174 | |
175 | /* Main entry point for operand parsing. | |
176 | ||
177 | This function is basically just a big switch statement. Earlier versions | |
178 | used tables to look up the function to use, but | |
179 | - if the table contains both assembler and disassembler functions then | |
180 | the disassembler contains much of the assembler and vice-versa, | |
181 | - there's a lot of inlining possibilities as things grow, | |
182 | - using a switch statement avoids the function call overhead. | |
183 | ||
184 | This function could be moved into `parse_insn_normal', but keeping it | |
185 | separate makes clear the interface between `parse_insn_normal' and each of | |
186 | the handlers. */ | |
187 | ||
188 | const char * | |
47b0e7ad NC |
189 | xstormy16_cgen_parse_operand (CGEN_CPU_DESC cd, |
190 | int opindex, | |
191 | const char ** strp, | |
192 | CGEN_FIELDS * fields) | |
93fbbb04 GK |
193 | { |
194 | const char * errmsg = NULL; | |
195 | /* Used by scalar operands that still need to be parsed. */ | |
196 | long junk ATTRIBUTE_UNUSED; | |
197 | ||
198 | switch (opindex) | |
199 | { | |
200 | case XSTORMY16_OPERAND_RB : | |
1951c6f7 | 201 | errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_Rb_names, & fields->f_Rb); |
93fbbb04 GK |
202 | break; |
203 | case XSTORMY16_OPERAND_RBJ : | |
1951c6f7 | 204 | errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_Rb_names, & fields->f_Rbj); |
93fbbb04 GK |
205 | break; |
206 | case XSTORMY16_OPERAND_RD : | |
207 | errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rd); | |
208 | break; | |
209 | case XSTORMY16_OPERAND_RDM : | |
210 | errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rdm); | |
211 | break; | |
212 | case XSTORMY16_OPERAND_RM : | |
213 | errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rm); | |
214 | break; | |
215 | case XSTORMY16_OPERAND_RS : | |
216 | errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rs); | |
217 | break; | |
218 | case XSTORMY16_OPERAND_ABS24 : | |
33b71eeb | 219 | errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_ABS24, (unsigned long *) (& fields->f_abs24)); |
93fbbb04 GK |
220 | break; |
221 | case XSTORMY16_OPERAND_BCOND2 : | |
222 | errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_h_branchcond, & fields->f_op2); | |
223 | break; | |
224 | case XSTORMY16_OPERAND_BCOND5 : | |
225 | errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_h_branchcond, & fields->f_op5); | |
226 | break; | |
227 | case XSTORMY16_OPERAND_HMEM8 : | |
33b71eeb | 228 | errmsg = parse_mem8 (cd, strp, XSTORMY16_OPERAND_HMEM8, (unsigned long *) (& fields->f_hmem8)); |
93fbbb04 GK |
229 | break; |
230 | case XSTORMY16_OPERAND_IMM12 : | |
33b71eeb | 231 | errmsg = cgen_parse_signed_integer (cd, strp, XSTORMY16_OPERAND_IMM12, (long *) (& fields->f_imm12)); |
93fbbb04 GK |
232 | break; |
233 | case XSTORMY16_OPERAND_IMM16 : | |
33b71eeb | 234 | errmsg = parse_immediate16 (cd, strp, XSTORMY16_OPERAND_IMM16, (unsigned long *) (& fields->f_imm16)); |
93fbbb04 GK |
235 | break; |
236 | case XSTORMY16_OPERAND_IMM2 : | |
33b71eeb | 237 | errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM2, (unsigned long *) (& fields->f_imm2)); |
93fbbb04 GK |
238 | break; |
239 | case XSTORMY16_OPERAND_IMM3 : | |
33b71eeb | 240 | errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM3, (unsigned long *) (& fields->f_imm3)); |
93fbbb04 GK |
241 | break; |
242 | case XSTORMY16_OPERAND_IMM3B : | |
33b71eeb | 243 | errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM3B, (unsigned long *) (& fields->f_imm3b)); |
93fbbb04 GK |
244 | break; |
245 | case XSTORMY16_OPERAND_IMM4 : | |
33b71eeb | 246 | errmsg = parse_small_immediate (cd, strp, XSTORMY16_OPERAND_IMM4, (unsigned long *) (& fields->f_imm4)); |
93fbbb04 GK |
247 | break; |
248 | case XSTORMY16_OPERAND_IMM8 : | |
33b71eeb | 249 | errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM8, (unsigned long *) (& fields->f_imm8)); |
93fbbb04 GK |
250 | break; |
251 | case XSTORMY16_OPERAND_IMM8SMALL : | |
33b71eeb | 252 | errmsg = parse_small_immediate (cd, strp, XSTORMY16_OPERAND_IMM8SMALL, (unsigned long *) (& fields->f_imm8)); |
93fbbb04 GK |
253 | break; |
254 | case XSTORMY16_OPERAND_LMEM8 : | |
33b71eeb | 255 | errmsg = parse_mem8 (cd, strp, XSTORMY16_OPERAND_LMEM8, (unsigned long *) (& fields->f_lmem8)); |
93fbbb04 GK |
256 | break; |
257 | case XSTORMY16_OPERAND_REL12 : | |
33b71eeb | 258 | errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL12, (unsigned long *) (& fields->f_rel12)); |
93fbbb04 GK |
259 | break; |
260 | case XSTORMY16_OPERAND_REL12A : | |
33b71eeb | 261 | errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL12A, (unsigned long *) (& fields->f_rel12a)); |
93fbbb04 GK |
262 | break; |
263 | case XSTORMY16_OPERAND_REL8_2 : | |
33b71eeb | 264 | errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL8_2, (unsigned long *) (& fields->f_rel8_2)); |
93fbbb04 GK |
265 | break; |
266 | case XSTORMY16_OPERAND_REL8_4 : | |
33b71eeb | 267 | errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL8_4, (unsigned long *) (& fields->f_rel8_4)); |
93fbbb04 GK |
268 | break; |
269 | case XSTORMY16_OPERAND_WS2 : | |
270 | errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_h_wordsize, & fields->f_op2m); | |
271 | break; | |
272 | ||
273 | default : | |
274 | /* xgettext:c-format */ | |
275 | fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex); | |
276 | abort (); | |
277 | } | |
278 | ||
279 | return errmsg; | |
280 | } | |
281 | ||
282 | cgen_parse_fn * const xstormy16_cgen_parse_handlers[] = | |
283 | { | |
284 | parse_insn_normal, | |
285 | }; | |
286 | ||
287 | void | |
47b0e7ad | 288 | xstormy16_cgen_init_asm (CGEN_CPU_DESC cd) |
93fbbb04 GK |
289 | { |
290 | xstormy16_cgen_init_opcode_table (cd); | |
291 | xstormy16_cgen_init_ibld_table (cd); | |
292 | cd->parse_handlers = & xstormy16_cgen_parse_handlers[0]; | |
293 | cd->parse_operand = xstormy16_cgen_parse_operand; | |
294 | } | |
295 | ||
296 | \f | |
297 | ||
298 | /* Regex construction routine. | |
299 | ||
300 | This translates an opcode syntax string into a regex string, | |
301 | by replacing any non-character syntax element (such as an | |
302 | opcode) with the pattern '.*' | |
303 | ||
304 | It then compiles the regex and stores it in the opcode, for | |
305 | later use by xstormy16_cgen_assemble_insn | |
306 | ||
307 | Returns NULL for success, an error message for failure. */ | |
308 | ||
309 | char * | |
ffead7ae | 310 | xstormy16_cgen_build_insn_regex (CGEN_INSN *insn) |
93fbbb04 GK |
311 | { |
312 | CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn); | |
313 | const char *mnem = CGEN_INSN_MNEMONIC (insn); | |
314 | char rxbuf[CGEN_MAX_RX_ELEMENTS]; | |
315 | char *rx = rxbuf; | |
316 | const CGEN_SYNTAX_CHAR_TYPE *syn; | |
317 | int reg_err; | |
318 | ||
319 | syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc)); | |
320 | ||
321 | /* Mnemonics come first in the syntax string. */ | |
322 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) | |
323 | return _("missing mnemonic in syntax string"); | |
324 | ++syn; | |
325 | ||
326 | /* Generate a case sensitive regular expression that emulates case | |
327 | insensitive matching in the "C" locale. We cannot generate a case | |
328 | insensitive regular expression because in Turkish locales, 'i' and 'I' | |
329 | are not equal modulo case conversion. */ | |
330 | ||
331 | /* Copy the literal mnemonic out of the insn. */ | |
332 | for (; *mnem; mnem++) | |
333 | { | |
334 | char c = *mnem; | |
335 | ||
336 | if (ISALPHA (c)) | |
337 | { | |
338 | *rx++ = '['; | |
339 | *rx++ = TOLOWER (c); | |
340 | *rx++ = TOUPPER (c); | |
341 | *rx++ = ']'; | |
342 | } | |
343 | else | |
344 | *rx++ = c; | |
345 | } | |
346 | ||
347 | /* Copy any remaining literals from the syntax string into the rx. */ | |
348 | for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn) | |
349 | { | |
350 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
351 | { | |
352 | char c = CGEN_SYNTAX_CHAR (* syn); | |
353 | ||
354 | switch (c) | |
355 | { | |
356 | /* Escape any regex metacharacters in the syntax. */ | |
357 | case '.': case '[': case '\\': | |
358 | case '*': case '^': case '$': | |
359 | ||
360 | #ifdef CGEN_ESCAPE_EXTENDED_REGEX | |
361 | case '?': case '{': case '}': | |
362 | case '(': case ')': case '*': | |
363 | case '|': case '+': case ']': | |
364 | #endif | |
365 | *rx++ = '\\'; | |
366 | *rx++ = c; | |
367 | break; | |
368 | ||
369 | default: | |
370 | if (ISALPHA (c)) | |
371 | { | |
372 | *rx++ = '['; | |
373 | *rx++ = TOLOWER (c); | |
374 | *rx++ = TOUPPER (c); | |
375 | *rx++ = ']'; | |
376 | } | |
377 | else | |
378 | *rx++ = c; | |
379 | break; | |
380 | } | |
381 | } | |
382 | else | |
383 | { | |
384 | /* Replace non-syntax fields with globs. */ | |
385 | *rx++ = '.'; | |
386 | *rx++ = '*'; | |
387 | } | |
388 | } | |
389 | ||
390 | /* Trailing whitespace ok. */ | |
391 | * rx++ = '['; | |
392 | * rx++ = ' '; | |
393 | * rx++ = '\t'; | |
394 | * rx++ = ']'; | |
395 | * rx++ = '*'; | |
396 | ||
397 | /* But anchor it after that. */ | |
398 | * rx++ = '$'; | |
399 | * rx = '\0'; | |
400 | ||
401 | CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t)); | |
402 | reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB); | |
403 | ||
404 | if (reg_err == 0) | |
405 | return NULL; | |
406 | else | |
407 | { | |
408 | static char msg[80]; | |
409 | ||
410 | regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80); | |
411 | regfree ((regex_t *) CGEN_INSN_RX (insn)); | |
412 | free (CGEN_INSN_RX (insn)); | |
413 | (CGEN_INSN_RX (insn)) = NULL; | |
414 | return msg; | |
415 | } | |
416 | } | |
417 | ||
418 | \f | |
419 | /* Default insn parser. | |
420 | ||
421 | The syntax string is scanned and operands are parsed and stored in FIELDS. | |
422 | Relocs are queued as we go via other callbacks. | |
423 | ||
424 | ??? Note that this is currently an all-or-nothing parser. If we fail to | |
425 | parse the instruction, we return 0 and the caller will start over from | |
426 | the beginning. Backtracking will be necessary in parsing subexpressions, | |
427 | but that can be handled there. Not handling backtracking here may get | |
428 | expensive in the case of the m68k. Deal with later. | |
429 | ||
430 | Returns NULL for success, an error message for failure. */ | |
431 | ||
432 | static const char * | |
ffead7ae MM |
433 | parse_insn_normal (CGEN_CPU_DESC cd, |
434 | const CGEN_INSN *insn, | |
435 | const char **strp, | |
436 | CGEN_FIELDS *fields) | |
93fbbb04 GK |
437 | { |
438 | /* ??? Runtime added insns not handled yet. */ | |
439 | const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); | |
440 | const char *str = *strp; | |
441 | const char *errmsg; | |
442 | const char *p; | |
443 | const CGEN_SYNTAX_CHAR_TYPE * syn; | |
444 | #ifdef CGEN_MNEMONIC_OPERANDS | |
445 | /* FIXME: wip */ | |
446 | int past_opcode_p; | |
447 | #endif | |
448 | ||
449 | /* For now we assume the mnemonic is first (there are no leading operands). | |
450 | We can parse it without needing to set up operand parsing. | |
451 | GAS's input scrubber will ensure mnemonics are lowercase, but we may | |
452 | not be called from GAS. */ | |
453 | p = CGEN_INSN_MNEMONIC (insn); | |
454 | while (*p && TOLOWER (*p) == TOLOWER (*str)) | |
455 | ++p, ++str; | |
456 | ||
457 | if (* p) | |
458 | return _("unrecognized instruction"); | |
459 | ||
460 | #ifndef CGEN_MNEMONIC_OPERANDS | |
461 | if (* str && ! ISSPACE (* str)) | |
462 | return _("unrecognized instruction"); | |
463 | #endif | |
464 | ||
465 | CGEN_INIT_PARSE (cd); | |
466 | cgen_init_parse_operand (cd); | |
467 | #ifdef CGEN_MNEMONIC_OPERANDS | |
468 | past_opcode_p = 0; | |
469 | #endif | |
470 | ||
471 | /* We don't check for (*str != '\0') here because we want to parse | |
472 | any trailing fake arguments in the syntax string. */ | |
473 | syn = CGEN_SYNTAX_STRING (syntax); | |
474 | ||
475 | /* Mnemonics come first for now, ensure valid string. */ | |
476 | if (! CGEN_SYNTAX_MNEMONIC_P (* syn)) | |
477 | abort (); | |
478 | ||
479 | ++syn; | |
480 | ||
481 | while (* syn != 0) | |
482 | { | |
483 | /* Non operand chars must match exactly. */ | |
484 | if (CGEN_SYNTAX_CHAR_P (* syn)) | |
485 | { | |
486 | /* FIXME: While we allow for non-GAS callers above, we assume the | |
487 | first char after the mnemonic part is a space. */ | |
488 | /* FIXME: We also take inappropriate advantage of the fact that | |
489 | GAS's input scrubber will remove extraneous blanks. */ | |
490 | if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn))) | |
491 | { | |
492 | #ifdef CGEN_MNEMONIC_OPERANDS | |
493 | if (CGEN_SYNTAX_CHAR(* syn) == ' ') | |
494 | past_opcode_p = 1; | |
495 | #endif | |
496 | ++ syn; | |
497 | ++ str; | |
498 | } | |
499 | else if (*str) | |
500 | { | |
501 | /* Syntax char didn't match. Can't be this insn. */ | |
502 | static char msg [80]; | |
503 | ||
504 | /* xgettext:c-format */ | |
505 | sprintf (msg, _("syntax error (expected char `%c', found `%c')"), | |
506 | CGEN_SYNTAX_CHAR(*syn), *str); | |
507 | return msg; | |
508 | } | |
509 | else | |
510 | { | |
511 | /* Ran out of input. */ | |
512 | static char msg [80]; | |
513 | ||
514 | /* xgettext:c-format */ | |
515 | sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"), | |
516 | CGEN_SYNTAX_CHAR(*syn)); | |
517 | return msg; | |
518 | } | |
519 | continue; | |
520 | } | |
521 | ||
522 | /* We have an operand of some sort. */ | |
a978a3e5 | 523 | errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), |
93fbbb04 GK |
524 | &str, fields); |
525 | if (errmsg) | |
526 | return errmsg; | |
527 | ||
528 | /* Done with this operand, continue with next one. */ | |
529 | ++ syn; | |
530 | } | |
531 | ||
532 | /* If we're at the end of the syntax string, we're done. */ | |
533 | if (* syn == 0) | |
534 | { | |
535 | /* FIXME: For the moment we assume a valid `str' can only contain | |
536 | blanks now. IE: We needn't try again with a longer version of | |
537 | the insn and it is assumed that longer versions of insns appear | |
538 | before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */ | |
539 | while (ISSPACE (* str)) | |
540 | ++ str; | |
541 | ||
542 | if (* str != '\0') | |
543 | return _("junk at end of line"); /* FIXME: would like to include `str' */ | |
544 | ||
545 | return NULL; | |
546 | } | |
547 | ||
548 | /* We couldn't parse it. */ | |
549 | return _("unrecognized instruction"); | |
550 | } | |
551 | \f | |
552 | /* Main entry point. | |
553 | This routine is called for each instruction to be assembled. | |
554 | STR points to the insn to be assembled. | |
555 | We assume all necessary tables have been initialized. | |
556 | The assembled instruction, less any fixups, is stored in BUF. | |
557 | Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value | |
558 | still needs to be converted to target byte order, otherwise BUF is an array | |
559 | of bytes in target byte order. | |
560 | The result is a pointer to the insn's entry in the opcode table, | |
561 | or NULL if an error occured (an error message will have already been | |
562 | printed). | |
563 | ||
564 | Note that when processing (non-alias) macro-insns, | |
565 | this function recurses. | |
566 | ||
567 | ??? It's possible to make this cpu-independent. | |
568 | One would have to deal with a few minor things. | |
569 | At this point in time doing so would be more of a curiosity than useful | |
570 | [for example this file isn't _that_ big], but keeping the possibility in | |
571 | mind helps keep the design clean. */ | |
572 | ||
573 | const CGEN_INSN * | |
ffead7ae MM |
574 | xstormy16_cgen_assemble_insn (CGEN_CPU_DESC cd, |
575 | const char *str, | |
576 | CGEN_FIELDS *fields, | |
577 | CGEN_INSN_BYTES_PTR buf, | |
578 | char **errmsg) | |
93fbbb04 GK |
579 | { |
580 | const char *start; | |
581 | CGEN_INSN_LIST *ilist; | |
582 | const char *parse_errmsg = NULL; | |
583 | const char *insert_errmsg = NULL; | |
584 | int recognized_mnemonic = 0; | |
585 | ||
586 | /* Skip leading white space. */ | |
587 | while (ISSPACE (* str)) | |
588 | ++ str; | |
589 | ||
590 | /* The instructions are stored in hashed lists. | |
591 | Get the first in the list. */ | |
592 | ilist = CGEN_ASM_LOOKUP_INSN (cd, str); | |
593 | ||
594 | /* Keep looking until we find a match. */ | |
595 | start = str; | |
596 | for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist)) | |
597 | { | |
598 | const CGEN_INSN *insn = ilist->insn; | |
599 | recognized_mnemonic = 1; | |
600 | ||
601 | #ifdef CGEN_VALIDATE_INSN_SUPPORTED | |
602 | /* Not usually needed as unsupported opcodes | |
603 | shouldn't be in the hash lists. */ | |
604 | /* Is this insn supported by the selected cpu? */ | |
605 | if (! xstormy16_cgen_insn_supported (cd, insn)) | |
606 | continue; | |
607 | #endif | |
b11dcf4e | 608 | /* If the RELAXED attribute is set, this is an insn that shouldn't be |
93fbbb04 GK |
609 | chosen immediately. Instead, it is used during assembler/linker |
610 | relaxation if possible. */ | |
b11dcf4e | 611 | if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0) |
93fbbb04 GK |
612 | continue; |
613 | ||
614 | str = start; | |
615 | ||
616 | /* Skip this insn if str doesn't look right lexically. */ | |
617 | if (CGEN_INSN_RX (insn) != NULL && | |
618 | regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH) | |
619 | continue; | |
620 | ||
621 | /* Allow parse/insert handlers to obtain length of insn. */ | |
622 | CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); | |
623 | ||
624 | parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields); | |
625 | if (parse_errmsg != NULL) | |
626 | continue; | |
627 | ||
628 | /* ??? 0 is passed for `pc'. */ | |
629 | insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf, | |
630 | (bfd_vma) 0); | |
631 | if (insert_errmsg != NULL) | |
632 | continue; | |
633 | ||
634 | /* It is up to the caller to actually output the insn and any | |
635 | queued relocs. */ | |
636 | return insn; | |
637 | } | |
638 | ||
639 | { | |
640 | static char errbuf[150]; | |
641 | #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS | |
642 | const char *tmp_errmsg; | |
643 | ||
644 | /* If requesting verbose error messages, use insert_errmsg. | |
645 | Failing that, use parse_errmsg. */ | |
646 | tmp_errmsg = (insert_errmsg ? insert_errmsg : | |
647 | parse_errmsg ? parse_errmsg : | |
648 | recognized_mnemonic ? | |
649 | _("unrecognized form of instruction") : | |
650 | _("unrecognized instruction")); | |
651 | ||
652 | if (strlen (start) > 50) | |
653 | /* xgettext:c-format */ | |
654 | sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start); | |
655 | else | |
656 | /* xgettext:c-format */ | |
657 | sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start); | |
658 | #else | |
659 | if (strlen (start) > 50) | |
660 | /* xgettext:c-format */ | |
661 | sprintf (errbuf, _("bad instruction `%.50s...'"), start); | |
662 | else | |
663 | /* xgettext:c-format */ | |
664 | sprintf (errbuf, _("bad instruction `%.50s'"), start); | |
665 | #endif | |
666 | ||
667 | *errmsg = errbuf; | |
668 | return NULL; | |
669 | } | |
670 | } |