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c6aa56bc C |
1 | /* tc-v850.c -- Assembler code for the NEC V850 |
2 | ||
3 | Copyright (C) 1996 Free Software Foundation. | |
4 | ||
5 | This file is part of GAS, the GNU Assembler. | |
6 | ||
7 | GAS is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GAS is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GAS; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include <stdio.h> | |
23 | #include <ctype.h> | |
24 | #include "as.h" | |
25 | #include "subsegs.h" | |
26 | #include "opcode/v850.h" | |
27 | \f | |
0e8f9bd1 JL |
28 | /* Structure to hold information about predefined registers. */ |
29 | struct reg_name | |
30 | { | |
31 | const char *name; | |
32 | int value; | |
33 | }; | |
34 | ||
c6aa56bc C |
35 | /* Generic assembler global variables which must be defined by all targets. */ |
36 | ||
37 | /* Characters which always start a comment. */ | |
38 | const char comment_chars[] = "#"; | |
39 | ||
40 | /* Characters which start a comment at the beginning of a line. */ | |
dcf5d117 | 41 | const char line_comment_chars[] = ";#"; |
c6aa56bc C |
42 | |
43 | /* Characters which may be used to separate multiple commands on a | |
44 | single line. */ | |
45 | const char line_separator_chars[] = ";"; | |
46 | ||
47 | /* Characters which are used to indicate an exponent in a floating | |
48 | point number. */ | |
49 | const char EXP_CHARS[] = "eE"; | |
50 | ||
51 | /* Characters which mean that a number is a floating point constant, | |
52 | as in 0d1.0. */ | |
53 | const char FLT_CHARS[] = "dD"; | |
54 | \f | |
f964b01d | 55 | |
c6aa56bc C |
56 | /* local functions */ |
57 | static unsigned long v850_insert_operand | |
58 | PARAMS ((unsigned long insn, const struct v850_operand *operand, | |
59 | offsetT val, char *file, unsigned int line)); | |
c84615bc | 60 | static int reg_name_search PARAMS ((const struct reg_name *, int, const char *)); |
c6aa56bc | 61 | static boolean register_name PARAMS ((expressionS *expressionP)); |
0e8f9bd1 | 62 | static boolean system_register_name PARAMS ((expressionS *expressionP)); |
c9f1b2d9 | 63 | static boolean cc_name PARAMS ((expressionS *expressionP)); |
f964b01d | 64 | static bfd_reloc_code_real_type v850_reloc_prefix PARAMS ((void)); |
c6aa56bc C |
65 | |
66 | ||
67 | /* fixups */ | |
68 | #define MAX_INSN_FIXUPS (5) | |
69 | struct v850_fixup | |
70 | { | |
71 | expressionS exp; | |
72 | int opindex; | |
73 | bfd_reloc_code_real_type reloc; | |
74 | }; | |
75 | struct v850_fixup fixups[MAX_INSN_FIXUPS]; | |
76 | static int fc; | |
77 | \f | |
78 | const char *md_shortopts = ""; | |
79 | struct option md_longopts[] = { | |
80 | {NULL, no_argument, NULL, 0} | |
81 | }; | |
82 | size_t md_longopts_size = sizeof(md_longopts); | |
83 | ||
84 | /* The target specific pseudo-ops which we support. */ | |
85 | const pseudo_typeS md_pseudo_table[] = | |
86 | { | |
c6aa56bc C |
87 | { NULL, NULL, 0 } |
88 | }; | |
89 | ||
90 | /* Opcode hash table. */ | |
91 | static struct hash_control *v850_hash; | |
92 | ||
1510cd39 C |
93 | /* This table is sorted. Suitable for searching by a binary search. */ |
94 | static const struct reg_name pre_defined_registers[] = | |
c6aa56bc C |
95 | { |
96 | { "ep", 30 }, /* ep - element ptr */ | |
97 | { "gp", 4 }, /* gp - global ptr */ | |
98 | { "lp", 31 }, /* lp - link ptr */ | |
99 | { "r0", 0 }, | |
100 | { "r1", 1 }, | |
101 | { "r10", 10 }, | |
102 | { "r11", 11 }, | |
103 | { "r12", 12 }, | |
104 | { "r13", 13 }, | |
105 | { "r14", 14 }, | |
106 | { "r15", 15 }, | |
107 | { "r16", 16 }, | |
108 | { "r17", 17 }, | |
109 | { "r18", 18 }, | |
110 | { "r19", 19 }, | |
111 | { "r2", 2 }, | |
112 | { "r20", 20 }, | |
113 | { "r21", 21 }, | |
114 | { "r22", 22 }, | |
115 | { "r23", 23 }, | |
116 | { "r24", 24 }, | |
117 | { "r25", 25 }, | |
118 | { "r26", 26 }, | |
119 | { "r27", 27 }, | |
120 | { "r28", 28 }, | |
121 | { "r29", 29 }, | |
122 | { "r3", 3 }, | |
123 | { "r30", 30 }, | |
124 | { "r31", 31 }, | |
125 | { "r4", 4 }, | |
126 | { "r5", 5 }, | |
127 | { "r6", 6 }, | |
128 | { "r7", 7 }, | |
129 | { "r8", 8 }, | |
130 | { "r9", 9 }, | |
131 | { "sp", 3 }, /* sp - stack ptr */ | |
132 | { "tp", 5 }, /* tp - text ptr */ | |
133 | { "zero", 0 }, | |
134 | }; | |
1510cd39 C |
135 | #define REG_NAME_CNT (sizeof(pre_defined_registers) / sizeof(struct reg_name)) |
136 | ||
137 | ||
138 | static const struct reg_name system_registers[] = | |
139 | { | |
140 | { "eipc", 0 }, | |
141 | { "eipsw", 1 }, | |
142 | { "fepc", 2 }, | |
143 | { "fepsw", 3 }, | |
144 | { "ecr", 4 }, | |
145 | { "psw", 5 }, | |
146 | }; | |
0e8f9bd1 | 147 | #define SYSREG_NAME_CNT (sizeof(system_registers) / sizeof(struct reg_name)) |
1510cd39 C |
148 | |
149 | static const struct reg_name cc_names[] = | |
150 | { | |
151 | { "c", 0x1 }, | |
152 | { "ge", 0xe }, | |
153 | { "gt", 0xf }, | |
154 | { "h", 0xb }, | |
155 | { "l", 0x1 }, | |
156 | { "le", 0x7 }, | |
157 | { "lt", 0x6 }, | |
158 | { "n", 0x4 }, | |
159 | { "nc", 0x9 }, | |
160 | { "nh", 0x3 }, | |
161 | { "nl", 0x9 }, | |
162 | { "ns", 0xc }, | |
163 | { "nv", 0x8 }, | |
164 | { "nz", 0xa }, | |
165 | { "p", 0xc }, | |
166 | { "s", 0x4 }, | |
167 | { "sa", 0xd }, | |
168 | { "t", 0x5 }, | |
169 | { "v", 0x0 }, | |
170 | { "z", 0x2 }, | |
171 | }; | |
c9f1b2d9 | 172 | #define CC_NAME_CNT (sizeof(cc_names) / sizeof(struct reg_name)) |
c6aa56bc | 173 | |
0e8f9bd1 JL |
174 | /* reg_name_search does a binary search of the given register table |
175 | to see if "name" is a valid regiter name. Returns the register | |
c6aa56bc C |
176 | number from the array on success, or -1 on failure. */ |
177 | ||
178 | static int | |
c84615bc C |
179 | reg_name_search (regs, regcount, name) |
180 | const struct reg_name *regs; | |
181 | int regcount; | |
182 | const char *name; | |
c6aa56bc | 183 | { |
c84615bc | 184 | int middle, low, high; |
c6aa56bc C |
185 | int cmp; |
186 | ||
187 | low = 0; | |
c84615bc C |
188 | high = regcount - 1; |
189 | ||
c6aa56bc C |
190 | do |
191 | { | |
192 | middle = (low + high) / 2; | |
c84615bc | 193 | cmp = strcasecmp (name, regs[middle].name); |
c6aa56bc C |
194 | if (cmp < 0) |
195 | high = middle - 1; | |
196 | else if (cmp > 0) | |
197 | low = middle + 1; | |
198 | else | |
c84615bc | 199 | return regs[middle].value; |
c6aa56bc C |
200 | } |
201 | while (low <= high); | |
202 | return -1; | |
203 | } | |
204 | ||
205 | ||
206 | /* Summary of register_name(). | |
207 | * | |
208 | * in: Input_line_pointer points to 1st char of operand. | |
209 | * | |
210 | * out: A expressionS. | |
211 | * The operand may have been a register: in this case, X_op == O_register, | |
212 | * X_add_number is set to the register number, and truth is returned. | |
213 | * Input_line_pointer->(next non-blank) char after operand, or is in | |
214 | * its original state. | |
215 | */ | |
216 | static boolean | |
217 | register_name (expressionP) | |
218 | expressionS *expressionP; | |
219 | { | |
220 | int reg_number; | |
221 | char *name; | |
222 | char *start; | |
223 | char c; | |
224 | ||
225 | /* Find the spelling of the operand */ | |
226 | start = name = input_line_pointer; | |
227 | ||
228 | c = get_symbol_end (); | |
c84615bc | 229 | reg_number = reg_name_search (pre_defined_registers, REG_NAME_CNT, name); |
0e8f9bd1 JL |
230 | |
231 | /* look to see if it's in the register table */ | |
232 | if (reg_number >= 0) | |
233 | { | |
234 | expressionP->X_op = O_register; | |
235 | expressionP->X_add_number = reg_number; | |
236 | ||
237 | /* make the rest nice */ | |
238 | expressionP->X_add_symbol = NULL; | |
239 | expressionP->X_op_symbol = NULL; | |
240 | *input_line_pointer = c; /* put back the delimiting char */ | |
241 | return true; | |
242 | } | |
243 | else | |
244 | { | |
245 | /* reset the line as if we had not done anything */ | |
246 | *input_line_pointer = c; /* put back the delimiting char */ | |
247 | input_line_pointer = start; /* reset input_line pointer */ | |
248 | return false; | |
249 | } | |
250 | } | |
251 | ||
252 | /* Summary of system_register_name(). | |
253 | * | |
254 | * in: Input_line_pointer points to 1st char of operand. | |
255 | * | |
256 | * out: A expressionS. | |
257 | * The operand may have been a register: in this case, X_op == O_register, | |
258 | * X_add_number is set to the register number, and truth is returned. | |
259 | * Input_line_pointer->(next non-blank) char after operand, or is in | |
260 | * its original state. | |
261 | */ | |
262 | static boolean | |
263 | system_register_name (expressionP) | |
264 | expressionS *expressionP; | |
265 | { | |
266 | int reg_number; | |
267 | char *name; | |
268 | char *start; | |
269 | char c; | |
270 | ||
271 | /* Find the spelling of the operand */ | |
272 | start = name = input_line_pointer; | |
273 | ||
274 | c = get_symbol_end (); | |
c84615bc | 275 | reg_number = reg_name_search (system_registers, SYSREG_NAME_CNT, name); |
c6aa56bc C |
276 | |
277 | /* look to see if it's in the register table */ | |
278 | if (reg_number >= 0) | |
279 | { | |
280 | expressionP->X_op = O_register; | |
281 | expressionP->X_add_number = reg_number; | |
282 | ||
283 | /* make the rest nice */ | |
284 | expressionP->X_add_symbol = NULL; | |
285 | expressionP->X_op_symbol = NULL; | |
286 | *input_line_pointer = c; /* put back the delimiting char */ | |
287 | return true; | |
288 | } | |
289 | else | |
290 | { | |
291 | /* reset the line as if we had not done anything */ | |
292 | *input_line_pointer = c; /* put back the delimiting char */ | |
293 | input_line_pointer = start; /* reset input_line pointer */ | |
294 | return false; | |
295 | } | |
296 | } | |
297 | ||
c9f1b2d9 JL |
298 | /* Summary of cc_name(). |
299 | * | |
300 | * in: Input_line_pointer points to 1st char of operand. | |
301 | * | |
302 | * out: A expressionS. | |
303 | * The operand may have been a register: in this case, X_op == O_register, | |
304 | * X_add_number is set to the register number, and truth is returned. | |
305 | * Input_line_pointer->(next non-blank) char after operand, or is in | |
306 | * its original state. | |
307 | */ | |
308 | static boolean | |
309 | cc_name (expressionP) | |
310 | expressionS *expressionP; | |
311 | { | |
312 | int reg_number; | |
313 | char *name; | |
314 | char *start; | |
315 | char c; | |
316 | ||
317 | /* Find the spelling of the operand */ | |
318 | start = name = input_line_pointer; | |
319 | ||
320 | c = get_symbol_end (); | |
c84615bc | 321 | reg_number = reg_name_search (cc_names, CC_NAME_CNT, name); |
c9f1b2d9 JL |
322 | |
323 | /* look to see if it's in the register table */ | |
324 | if (reg_number >= 0) | |
325 | { | |
326 | expressionP->X_op = O_constant; | |
327 | expressionP->X_add_number = reg_number; | |
328 | ||
329 | /* make the rest nice */ | |
330 | expressionP->X_add_symbol = NULL; | |
331 | expressionP->X_op_symbol = NULL; | |
332 | *input_line_pointer = c; /* put back the delimiting char */ | |
333 | return true; | |
334 | } | |
335 | else | |
336 | { | |
337 | /* reset the line as if we had not done anything */ | |
338 | *input_line_pointer = c; /* put back the delimiting char */ | |
339 | input_line_pointer = start; /* reset input_line pointer */ | |
340 | return false; | |
341 | } | |
342 | } | |
343 | ||
c6aa56bc C |
344 | void |
345 | md_show_usage (stream) | |
346 | FILE *stream; | |
347 | { | |
348 | fprintf(stream, "V850 options:\n\ | |
349 | none yet\n"); | |
350 | } | |
351 | ||
352 | int | |
353 | md_parse_option (c, arg) | |
354 | int c; | |
355 | char *arg; | |
356 | { | |
357 | return 0; | |
358 | } | |
359 | ||
360 | symbolS * | |
361 | md_undefined_symbol (name) | |
362 | char *name; | |
363 | { | |
364 | return 0; | |
365 | } | |
366 | ||
367 | char * | |
368 | md_atof (type, litp, sizep) | |
369 | int type; | |
370 | char *litp; | |
371 | int *sizep; | |
372 | { | |
373 | int prec; | |
374 | LITTLENUM_TYPE words[4]; | |
375 | char *t; | |
376 | int i; | |
377 | ||
378 | switch (type) | |
379 | { | |
380 | case 'f': | |
381 | prec = 2; | |
382 | break; | |
383 | ||
384 | case 'd': | |
385 | prec = 4; | |
386 | break; | |
387 | ||
388 | default: | |
389 | *sizep = 0; | |
390 | return "bad call to md_atof"; | |
391 | } | |
392 | ||
393 | t = atof_ieee (input_line_pointer, type, words); | |
394 | if (t) | |
395 | input_line_pointer = t; | |
396 | ||
397 | *sizep = prec * 2; | |
398 | ||
399 | for (i = prec - 1; i >= 0; i--) | |
400 | { | |
401 | md_number_to_chars (litp, (valueT) words[i], 2); | |
402 | litp += 2; | |
403 | } | |
404 | ||
405 | return NULL; | |
406 | } | |
407 | ||
408 | ||
409 | void | |
410 | md_convert_frag (abfd, sec, fragP) | |
411 | bfd *abfd; | |
412 | asection *sec; | |
413 | fragS *fragP; | |
414 | { | |
415 | /* printf ("call to md_convert_frag \n"); */ | |
416 | abort (); | |
417 | } | |
418 | ||
419 | valueT | |
420 | md_section_align (seg, addr) | |
421 | asection *seg; | |
422 | valueT addr; | |
423 | { | |
424 | int align = bfd_get_section_alignment (stdoutput, seg); | |
425 | return ((addr + (1 << align) - 1) & (-1 << align)); | |
426 | } | |
427 | ||
428 | void | |
429 | md_begin () | |
430 | { | |
431 | char *prev_name = ""; | |
432 | register const struct v850_opcode *op; | |
c6aa56bc C |
433 | |
434 | v850_hash = hash_new(); | |
435 | ||
436 | /* Insert unique names into hash table. The V850 instruction set | |
437 | has many identical opcode names that have different opcodes based | |
438 | on the operands. This hash table then provides a quick index to | |
439 | the first opcode with a particular name in the opcode table. */ | |
440 | ||
441 | op = v850_opcodes; | |
05631de2 | 442 | while (op->name) |
c6aa56bc C |
443 | { |
444 | if (strcmp (prev_name, op->name)) | |
445 | { | |
446 | prev_name = (char *) op->name; | |
447 | hash_insert (v850_hash, op->name, (char *) op); | |
448 | } | |
05631de2 | 449 | op++; |
c6aa56bc C |
450 | } |
451 | } | |
452 | ||
c84615bc C |
453 | static bfd_reloc_code_real_type |
454 | v850_reloc_prefix() | |
c6aa56bc | 455 | { |
c84615bc C |
456 | if (strncmp(input_line_pointer, "hi0(", 4) == 0) |
457 | { | |
458 | input_line_pointer += 4; | |
459 | return BFD_RELOC_HI16; | |
460 | } | |
461 | if (strncmp(input_line_pointer, "hi(", 3) == 0) | |
462 | { | |
463 | input_line_pointer += 3; | |
464 | return BFD_RELOC_HI16_S; | |
465 | } | |
466 | if (strncmp (input_line_pointer, "lo(", 3) == 0) | |
467 | { | |
468 | input_line_pointer += 3; | |
469 | return BFD_RELOC_LO16; | |
470 | } | |
c6aa56bc | 471 | |
c84615bc C |
472 | /* FIXME: implement sda, tda, zda here */ |
473 | ||
474 | return BFD_RELOC_UNUSED; | |
475 | } | |
c6aa56bc | 476 | |
c6aa56bc C |
477 | void |
478 | md_assemble (str) | |
479 | char *str; | |
480 | { | |
481 | char *s; | |
482 | struct v850_opcode *opcode; | |
483 | struct v850_opcode *next_opcode; | |
484 | const unsigned char *opindex_ptr; | |
485 | int next_opindex; | |
f964b01d | 486 | unsigned long insn, size; |
c6aa56bc C |
487 | char *f; |
488 | int i; | |
c6aa56bc | 489 | int match; |
c84615bc | 490 | bfd_reloc_code_real_type reloc; |
c6aa56bc | 491 | |
c6aa56bc C |
492 | /* Get the opcode. */ |
493 | for (s = str; *s != '\0' && ! isspace (*s); s++) | |
494 | ; | |
495 | if (*s != '\0') | |
496 | *s++ = '\0'; | |
497 | ||
498 | /* find the first opcode with the proper name */ | |
499 | opcode = (struct v850_opcode *)hash_find (v850_hash, str); | |
500 | if (opcode == NULL) | |
501 | { | |
502 | as_bad ("Unrecognized opcode: `%s'", str); | |
503 | return; | |
504 | } | |
505 | ||
506 | str = s; | |
507 | while (isspace (*str)) | |
508 | ++str; | |
509 | ||
510 | input_line_pointer = str; | |
511 | ||
1510cd39 | 512 | for(;;) |
c6aa56bc | 513 | { |
1510cd39 C |
514 | const char *errmsg = NULL; |
515 | ||
516 | fc = 0; | |
517 | match = 0; | |
518 | next_opindex = 0; | |
d5974c57 | 519 | insn = opcode->opcode; |
1510cd39 | 520 | for (opindex_ptr = opcode->operands; *opindex_ptr != 0; opindex_ptr++) |
c6aa56bc | 521 | { |
1510cd39 C |
522 | const struct v850_operand *operand; |
523 | char *hold; | |
524 | expressionS ex; | |
c6aa56bc | 525 | |
1510cd39 | 526 | if (next_opindex == 0) |
c6aa56bc | 527 | { |
1510cd39 C |
528 | operand = &v850_operands[*opindex_ptr]; |
529 | } | |
530 | else | |
531 | { | |
532 | operand = &v850_operands[next_opindex]; | |
533 | next_opindex = 0; | |
c6aa56bc C |
534 | } |
535 | ||
1510cd39 C |
536 | errmsg = NULL; |
537 | ||
538 | while (*str == ' ' || *str == ',' || *str == '[' || *str == ']') | |
539 | ++str; | |
540 | ||
541 | /* Gather the operand. */ | |
542 | hold = input_line_pointer; | |
543 | input_line_pointer = str; | |
544 | ||
c84615bc C |
545 | |
546 | /* lo(), hi(), hi0(), etc... */ | |
547 | if ((reloc = v850_reloc_prefix()) != BFD_RELOC_UNUSED) | |
548 | { | |
549 | expression(&ex); | |
550 | ||
551 | if (*input_line_pointer++ != ')') | |
552 | { | |
553 | errmsg = "syntax error: expected `)'"; | |
554 | goto error; | |
555 | } | |
556 | ||
557 | if (ex.X_op == O_constant) | |
558 | { | |
559 | switch (reloc) | |
560 | { | |
561 | case BFD_RELOC_LO16: | |
562 | ex.X_add_number &= 0xffff; | |
563 | break; | |
564 | ||
565 | case BFD_RELOC_HI16: | |
566 | ex.X_add_number = ((ex.X_add_number >> 16) & 0xffff); | |
567 | break; | |
568 | ||
569 | case BFD_RELOC_HI16_S: | |
570 | ex.X_add_number = ((ex.X_add_number >> 16) & 0xffff) | |
571 | + ((ex.X_add_number >> 15) & 1); | |
572 | break; | |
f964b01d JL |
573 | |
574 | default: | |
575 | break; | |
c84615bc C |
576 | } |
577 | ||
578 | insn = v850_insert_operand (insn, operand, ex.X_add_number, | |
579 | (char *) NULL, 0); | |
580 | } | |
581 | else | |
582 | { | |
583 | if (fc > MAX_INSN_FIXUPS) | |
584 | as_fatal ("too many fixups"); | |
585 | ||
586 | fixups[fc].exp = ex; | |
587 | fixups[fc].opindex = *opindex_ptr; | |
588 | fixups[fc].reloc = reloc; | |
589 | fc++; | |
590 | } | |
591 | } | |
592 | else | |
593 | { | |
1510cd39 | 594 | if ((operand->flags & V850_OPERAND_REG) != 0) |
c6aa56bc | 595 | { |
1510cd39 | 596 | if (!register_name(&ex)) |
c6aa56bc | 597 | { |
1510cd39 C |
598 | errmsg = "invalid register name"; |
599 | goto error; | |
c6aa56bc C |
600 | } |
601 | } | |
0e8f9bd1 JL |
602 | else if ((operand->flags & V850_OPERAND_SRG) != 0) |
603 | { | |
604 | if (!system_register_name(&ex)) | |
605 | { | |
606 | errmsg = "invalid system register name"; | |
607 | goto error; | |
608 | } | |
609 | } | |
88b47a85 JL |
610 | else if ((operand->flags & V850_OPERAND_EP) != 0) |
611 | { | |
612 | char *start = input_line_pointer; | |
613 | char c = get_symbol_end (); | |
c84615bc | 614 | if (strcmp (start, "ep") != 0 && strcmp (start, "r30") != 0) |
88b47a85 JL |
615 | { |
616 | /* Put things back the way we found them. */ | |
617 | *input_line_pointer = c; | |
618 | input_line_pointer = start; | |
619 | errmsg = "expected EP register"; | |
620 | goto error; | |
621 | } | |
622 | *input_line_pointer = c; | |
623 | str = input_line_pointer; | |
624 | input_line_pointer = hold; | |
c84615bc | 625 | |
88b47a85 JL |
626 | while (*str == ' ' || *str == ',' || *str == '[' || *str == ']') |
627 | ++str; | |
628 | continue; | |
629 | } | |
c9f1b2d9 JL |
630 | else if ((operand->flags & V850_OPERAND_CC) != 0) |
631 | { | |
632 | if (!cc_name(&ex)) | |
633 | { | |
634 | errmsg = "invalid condition code name"; | |
635 | goto error; | |
636 | } | |
637 | } | |
c9a32d6c JL |
638 | else if (register_name (&ex) |
639 | && (operand->flags & V850_OPERAND_REG) == 0) | |
640 | { | |
641 | errmsg = "syntax error: register not expected"; | |
642 | goto error; | |
643 | } | |
0e8f9bd1 JL |
644 | else if (system_register_name (&ex) |
645 | && (operand->flags & V850_OPERAND_SRG) == 0) | |
646 | { | |
647 | errmsg = "syntax error: system register not expected"; | |
648 | goto error; | |
649 | } | |
c9f1b2d9 JL |
650 | else if (cc_name (&ex) |
651 | && (operand->flags & V850_OPERAND_CC) == 0) | |
652 | { | |
653 | errmsg = "syntax error: condition code not expected"; | |
654 | goto error; | |
655 | } | |
1510cd39 C |
656 | else |
657 | { | |
c84615bc | 658 | expression(&ex); |
1510cd39 | 659 | } |
c6aa56bc | 660 | |
1510cd39 C |
661 | switch (ex.X_op) |
662 | { | |
663 | case O_illegal: | |
664 | errmsg = "illegal operand"; | |
665 | goto error; | |
666 | case O_absent: | |
667 | errmsg = "missing operand"; | |
668 | goto error; | |
669 | case O_register: | |
0e8f9bd1 | 670 | if ((operand->flags & (V850_OPERAND_REG | V850_OPERAND_SRG)) == 0) |
1510cd39 C |
671 | { |
672 | errmsg = "invalid operand"; | |
673 | goto error; | |
674 | } | |
675 | ||
676 | insn = v850_insert_operand (insn, operand, ex.X_add_number, | |
677 | (char *) NULL, 0); | |
678 | break; | |
679 | ||
680 | case O_constant: | |
681 | insn = v850_insert_operand (insn, operand, ex.X_add_number, | |
682 | (char *) NULL, 0); | |
683 | break; | |
684 | ||
685 | default: | |
686 | /* We need to generate a fixup for this expression. */ | |
687 | if (fc >= MAX_INSN_FIXUPS) | |
688 | as_fatal ("too many fixups"); | |
689 | fixups[fc].exp = ex; | |
690 | fixups[fc].opindex = *opindex_ptr; | |
691 | fixups[fc].reloc = BFD_RELOC_UNUSED; | |
692 | ++fc; | |
693 | break; | |
694 | } | |
695 | ||
c84615bc C |
696 | } |
697 | ||
698 | str = input_line_pointer; | |
699 | input_line_pointer = hold; | |
700 | ||
1510cd39 C |
701 | while (*str == ' ' || *str == ',' || *str == '[' || *str == ']') |
702 | ++str; | |
703 | } | |
704 | match = 1; | |
705 | ||
706 | error: | |
707 | if (match == 0) | |
708 | { | |
709 | next_opcode = opcode + 1; | |
710 | if (next_opcode->opcode != 0 && !strcmp(next_opcode->name, opcode->name)) | |
711 | { | |
712 | opcode = next_opcode; | |
713 | continue; | |
714 | } | |
715 | ||
716 | as_bad ("%s", errmsg); | |
717 | return; | |
718 | } | |
719 | break; | |
720 | } | |
721 | ||
c6aa56bc C |
722 | while (isspace (*str)) |
723 | ++str; | |
724 | ||
725 | if (*str != '\0') | |
726 | as_bad ("junk at end of line: `%s'", str); | |
1510cd39 C |
727 | |
728 | input_line_pointer = str; | |
c6aa56bc | 729 | |
f964b01d | 730 | /* Write out the instruction. |
c84615bc | 731 | |
f964b01d JL |
732 | Four byte insns have an opcode with the two high bits on. */ |
733 | if ((insn & 0x0600) == 0x0600) | |
734 | size = 4; | |
735 | else | |
736 | size = 2; | |
737 | f = frag_more (size); | |
738 | md_number_to_chars (f, insn, size); | |
c84615bc C |
739 | |
740 | /* Create any fixups. At this point we do not use a | |
741 | bfd_reloc_code_real_type, but instead just use the | |
742 | BFD_RELOC_UNUSED plus the operand index. This lets us easily | |
743 | handle fixups for any operand type, although that is admittedly | |
744 | not a very exciting feature. We pick a BFD reloc type in | |
745 | md_apply_fix. */ | |
746 | for (i = 0; i < fc; i++) | |
747 | { | |
748 | const struct v850_operand *operand; | |
749 | ||
750 | operand = &v850_operands[fixups[i].opindex]; | |
751 | if (fixups[i].reloc != BFD_RELOC_UNUSED) | |
752 | { | |
753 | reloc_howto_type *reloc_howto = bfd_reloc_type_lookup (stdoutput, fixups[i].reloc); | |
754 | int size; | |
755 | int offset; | |
756 | fixS *fixP; | |
757 | ||
758 | if (!reloc_howto) | |
759 | abort(); | |
760 | ||
761 | size = bfd_get_reloc_size (reloc_howto); | |
762 | offset = 4 - size; | |
763 | ||
764 | if (size < 1 || size > 4) | |
765 | abort(); | |
766 | ||
767 | fixP = fix_new_exp (frag_now, f - frag_now->fr_literal + offset, size, | |
768 | &fixups[i].exp, | |
769 | reloc_howto->pc_relative, | |
770 | fixups[i].reloc); | |
771 | } | |
772 | else | |
773 | { | |
774 | fix_new_exp (frag_now, f - frag_now->fr_literal, 4, | |
775 | &fixups[i].exp, | |
776 | 1 /* FIXME: V850_OPERAND_RELATIVE ??? */, | |
777 | ((bfd_reloc_code_real_type) | |
778 | (fixups[i].opindex + (int) BFD_RELOC_UNUSED))); | |
779 | } | |
780 | } | |
c6aa56bc C |
781 | } |
782 | ||
783 | ||
784 | /* if while processing a fixup, a reloc really needs to be created */ | |
785 | /* then it is done here */ | |
786 | ||
787 | arelent * | |
788 | tc_gen_reloc (seg, fixp) | |
789 | asection *seg; | |
790 | fixS *fixp; | |
791 | { | |
792 | arelent *reloc; | |
793 | reloc = (arelent *) bfd_alloc_by_size_t (stdoutput, sizeof (arelent)); | |
794 | reloc->sym_ptr_ptr = &fixp->fx_addsy->bsym; | |
795 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
796 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
797 | if (reloc->howto == (reloc_howto_type *) NULL) | |
798 | { | |
799 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
800 | "reloc %d not supported by object file format", (int)fixp->fx_r_type); | |
801 | return NULL; | |
802 | } | |
803 | reloc->addend = fixp->fx_addnumber; | |
804 | /* printf("tc_gen_reloc: addr=%x addend=%x\n", reloc->address, reloc->addend); */ | |
805 | return reloc; | |
806 | } | |
807 | ||
808 | int | |
809 | md_estimate_size_before_relax (fragp, seg) | |
810 | fragS *fragp; | |
811 | asection *seg; | |
812 | { | |
c6aa56bc C |
813 | return 0; |
814 | } | |
815 | ||
816 | long | |
0f8e50bb | 817 | md_pcrel_from (fixp) |
c6aa56bc | 818 | fixS *fixp; |
c6aa56bc | 819 | { |
f964b01d JL |
820 | /* If the symbol is undefined, or in a section other than our own, |
821 | then let the linker figure it out. */ | |
0f8e50bb | 822 | if (fixp->fx_addsy != (symbolS *) NULL && ! S_IS_DEFINED (fixp->fx_addsy)) |
c84615bc C |
823 | { |
824 | /* The symbol is undefined. Let the linker figure it out. */ | |
825 | return 0; | |
826 | } | |
827 | return fixp->fx_frag->fr_address + fixp->fx_where; | |
c6aa56bc C |
828 | } |
829 | ||
830 | int | |
831 | md_apply_fix3 (fixp, valuep, seg) | |
832 | fixS *fixp; | |
833 | valueT *valuep; | |
834 | segT seg; | |
835 | { | |
c6aa56bc C |
836 | valueT value; |
837 | char *where; | |
c6aa56bc C |
838 | |
839 | if (fixp->fx_addsy == (symbolS *) NULL) | |
840 | { | |
841 | value = *valuep; | |
842 | fixp->fx_done = 1; | |
843 | } | |
844 | else if (fixp->fx_pcrel) | |
845 | value = *valuep; | |
846 | else | |
847 | { | |
848 | value = fixp->fx_offset; | |
849 | if (fixp->fx_subsy != (symbolS *) NULL) | |
850 | { | |
851 | if (S_GET_SEGMENT (fixp->fx_subsy) == absolute_section) | |
852 | value -= S_GET_VALUE (fixp->fx_subsy); | |
853 | else | |
854 | { | |
855 | /* We don't actually support subtracting a symbol. */ | |
856 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
857 | "expression too complex"); | |
858 | } | |
859 | } | |
860 | } | |
c6aa56bc | 861 | |
c84615bc | 862 | /* printf("md_apply_fix: value=0x%x type=%d\n", value, fixp->fx_r_type); */ |
c6aa56bc | 863 | |
c84615bc C |
864 | if ((int) fixp->fx_r_type >= (int) BFD_RELOC_UNUSED) |
865 | { | |
866 | int opindex; | |
867 | const struct v850_operand *operand; | |
868 | char *where; | |
869 | unsigned long insn; | |
870 | ||
871 | opindex = (int) fixp->fx_r_type - (int) BFD_RELOC_UNUSED; | |
872 | operand = &v850_operands[opindex]; | |
873 | ||
874 | /* Fetch the instruction, insert the fully resolved operand | |
74dd0c07 JL |
875 | value, and stuff the instruction back again. |
876 | ||
877 | Note the instruction has been stored in little endian | |
878 | format! */ | |
c84615bc | 879 | where = fixp->fx_frag->fr_literal + fixp->fx_where; |
74dd0c07 JL |
880 | |
881 | insn = bfd_getl32((unsigned char *) where); | |
c84615bc C |
882 | insn = v850_insert_operand (insn, operand, (offsetT) value, |
883 | fixp->fx_file, fixp->fx_line); | |
74dd0c07 | 884 | bfd_putl32((bfd_vma) insn, (unsigned char *) where); |
c84615bc C |
885 | |
886 | if (fixp->fx_done) | |
887 | { | |
888 | /* Nothing else to do here. */ | |
889 | return 1; | |
890 | } | |
c6aa56bc | 891 | |
c84615bc C |
892 | /* Determine a BFD reloc value based on the operand information. |
893 | We are only prepared to turn a few of the operands into relocs. */ | |
c6aa56bc | 894 | |
c84615bc C |
895 | if (operand->bits == 22) |
896 | fixp->fx_r_type = BFD_RELOC_V850_22_PCREL; | |
897 | else if (operand->bits == 9) | |
898 | fixp->fx_r_type = BFD_RELOC_V850_9_PCREL; | |
899 | else | |
900 | { | |
901 | as_bad_where(fixp->fx_file, fixp->fx_line, | |
902 | "unresolved expression that must be resolved"); | |
903 | fixp->fx_done = 1; | |
904 | return 1; | |
905 | } | |
906 | } | |
2d56269e JL |
907 | else if (fixp->fx_done) |
908 | { | |
909 | /* We still have to insert the value into memory! */ | |
910 | where = fixp->fx_frag->fr_literal + fixp->fx_where; | |
911 | if (fixp->fx_size == 1) | |
912 | *where = value & 0xff; | |
913 | if (fixp->fx_size == 2) | |
914 | bfd_putl16(value & 0xffff, (unsigned char *) where); | |
915 | if (fixp->fx_size == 4) | |
916 | bfd_putl32(value, (unsigned char *) where); | |
917 | } | |
c6aa56bc C |
918 | |
919 | fixp->fx_addnumber = value; | |
920 | return 1; | |
c6aa56bc C |
921 | } |
922 | ||
923 | \f | |
924 | /* Insert an operand value into an instruction. */ | |
925 | ||
926 | static unsigned long | |
927 | v850_insert_operand (insn, operand, val, file, line) | |
928 | unsigned long insn; | |
929 | const struct v850_operand *operand; | |
930 | offsetT val; | |
931 | char *file; | |
932 | unsigned int line; | |
933 | { | |
c84615bc | 934 | if (operand->bits != 16) |
c6aa56bc C |
935 | { |
936 | long min, max; | |
937 | offsetT test; | |
938 | ||
1510cd39 | 939 | if ((operand->flags & V850_OPERAND_SIGNED) != 0) |
c6aa56bc | 940 | { |
c6aa56bc C |
941 | max = (1 << (operand->bits - 1)) - 1; |
942 | min = - (1 << (operand->bits - 1)); | |
943 | } | |
944 | else | |
c6aa56bc C |
945 | { |
946 | max = (1 << operand->bits) - 1; | |
947 | min = 0; | |
948 | } | |
949 | ||
f964b01d | 950 | test = val; |
c6aa56bc C |
951 | |
952 | ||
953 | if (test < (offsetT) min || test > (offsetT) max) | |
954 | { | |
955 | const char *err = | |
956 | "operand out of range (%s not between %ld and %ld)"; | |
957 | char buf[100]; | |
958 | ||
959 | sprint_value (buf, test); | |
960 | if (file == (char *) NULL) | |
961 | as_warn (err, buf, min, max); | |
962 | else | |
963 | as_warn_where (file, line, err, buf, min, max); | |
964 | } | |
965 | } | |
966 | ||
74dd0c07 JL |
967 | if (operand->insert) |
968 | { | |
969 | const char *message = NULL; | |
f964b01d | 970 | insn = (*operand->insert) (insn, val, &message); |
74dd0c07 JL |
971 | if (message != NULL) |
972 | { | |
973 | if (file == (char *) NULL) | |
974 | as_warn (message); | |
975 | else | |
976 | as_warn_where (file, line, message); | |
977 | } | |
978 | } | |
979 | else | |
980 | insn |= (((long) val & ((1 << operand->bits) - 1)) << operand->shift); | |
c6aa56bc C |
981 | return insn; |
982 | } |