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3d3d428f NC |
1 | /* tc-cr16.c -- Assembler code for the CR16 CPU core. |
2 | Copyright 2007 Free Software Foundation, Inc. | |
3 | ||
4 | Contributed by M R Swami Reddy <MR.Swami.Reddy@nsc.com> | |
5 | ||
6 | This file is part of GAS, the GNU Assembler. | |
7 | ||
8 | GAS is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
ec2655a6 | 10 | the Free Software Foundation; either version 3, or (at your option) |
3d3d428f NC |
11 | any later version. |
12 | ||
13 | GAS is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GAS; see the file COPYING. If not, write to the | |
20 | Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, | |
21 | MA 02110-1301, USA. */ | |
22 | ||
23 | #include "as.h" | |
24 | #include "safe-ctype.h" | |
25 | #include "dwarf2dbg.h" | |
26 | #include "opcode/cr16.h" | |
27 | #include "elf/cr16.h" | |
28 | ||
29 | ||
30 | /* Word is considered here as a 16-bit unsigned short int. */ | |
31 | #define WORD_SHIFT 16 | |
32 | ||
33 | /* Register is 2-byte size. */ | |
34 | #define REG_SIZE 2 | |
35 | ||
36 | /* Maximum size of a single instruction (in words). */ | |
37 | #define INSN_MAX_SIZE 3 | |
38 | ||
39 | /* Maximum bits which may be set in a `mask16' operand. */ | |
40 | #define MAX_REGS_IN_MASK16 8 | |
41 | ||
42 | /* Assign a number NUM, shifted by SHIFT bytes, into a location | |
43 | pointed by index BYTE of array 'output_opcode'. */ | |
44 | #define CR16_PRINT(BYTE, NUM, SHIFT) output_opcode[BYTE] |= (NUM << SHIFT) | |
45 | ||
46 | /* Operand errors. */ | |
47 | typedef enum | |
48 | { | |
49 | OP_LEGAL = 0, /* Legal operand. */ | |
50 | OP_OUT_OF_RANGE, /* Operand not within permitted range. */ | |
51 | OP_NOT_EVEN /* Operand is Odd number, should be even. */ | |
52 | } | |
53 | op_err; | |
54 | ||
55 | /* Opcode mnemonics hash table. */ | |
56 | static struct hash_control *cr16_inst_hash; | |
57 | /* CR16 registers hash table. */ | |
58 | static struct hash_control *reg_hash; | |
59 | /* CR16 register pair hash table. */ | |
60 | static struct hash_control *regp_hash; | |
61 | /* CR16 processor registers hash table. */ | |
62 | static struct hash_control *preg_hash; | |
63 | /* CR16 processor registers 32 bit hash table. */ | |
64 | static struct hash_control *pregp_hash; | |
65 | /* Current instruction we're assembling. */ | |
66 | const inst *instruction; | |
67 | ||
68 | ||
69 | static int code_label = 0; | |
70 | ||
71 | /* Global variables. */ | |
72 | ||
73 | /* Array to hold an instruction encoding. */ | |
74 | long output_opcode[2]; | |
75 | ||
76 | /* Nonzero means a relocatable symbol. */ | |
77 | int relocatable; | |
78 | ||
79 | /* A copy of the original instruction (used in error messages). */ | |
80 | char ins_parse[MAX_INST_LEN]; | |
81 | ||
82 | /* The current processed argument number. */ | |
83 | int cur_arg_num; | |
84 | ||
85 | /* Generic assembler global variables which must be defined by all targets. */ | |
86 | ||
87 | /* Characters which always start a comment. */ | |
88 | const char comment_chars[] = "#"; | |
89 | ||
90 | /* Characters which start a comment at the beginning of a line. */ | |
91 | const char line_comment_chars[] = "#"; | |
92 | ||
93 | /* This array holds machine specific line separator characters. */ | |
94 | const char line_separator_chars[] = ";"; | |
95 | ||
96 | /* Chars that can be used to separate mant from exp in floating point nums. */ | |
97 | const char EXP_CHARS[] = "eE"; | |
98 | ||
99 | /* Chars that mean this number is a floating point constant as in 0f12.456 */ | |
100 | const char FLT_CHARS[] = "f'"; | |
101 | ||
102 | /* Target-specific multicharacter options, not const-declared at usage. */ | |
103 | const char *md_shortopts = ""; | |
104 | struct option md_longopts[] = | |
105 | { | |
106 | {NULL, no_argument, NULL, 0} | |
107 | }; | |
108 | size_t md_longopts_size = sizeof (md_longopts); | |
109 | ||
110 | static void | |
111 | l_cons (int nbytes) | |
112 | { | |
113 | int c; | |
114 | expressionS exp; | |
115 | ||
116 | #ifdef md_flush_pending_output | |
117 | md_flush_pending_output (); | |
118 | #endif | |
119 | ||
120 | if (is_it_end_of_statement ()) | |
121 | { | |
122 | demand_empty_rest_of_line (); | |
123 | return; | |
124 | } | |
125 | ||
126 | #ifdef TC_ADDRESS_BYTES | |
127 | if (nbytes == 0) | |
128 | nbytes = TC_ADDRESS_BYTES (); | |
129 | #endif | |
130 | ||
131 | #ifdef md_cons_align | |
132 | md_cons_align (nbytes); | |
133 | #endif | |
134 | ||
135 | c = 0; | |
136 | do | |
137 | { | |
138 | unsigned int bits_available = BITS_PER_CHAR * nbytes; | |
139 | char *hold = input_line_pointer; | |
140 | ||
141 | expression (&exp); | |
142 | ||
143 | if (*input_line_pointer == ':') | |
144 | { | |
145 | /* Bitfields. */ | |
146 | long value = 0; | |
147 | ||
148 | for (;;) | |
149 | { | |
150 | unsigned long width; | |
151 | ||
152 | if (*input_line_pointer != ':') | |
153 | { | |
154 | input_line_pointer = hold; | |
155 | break; | |
156 | } | |
157 | if (exp.X_op == O_absent) | |
158 | { | |
159 | as_warn (_("using a bit field width of zero")); | |
160 | exp.X_add_number = 0; | |
161 | exp.X_op = O_constant; | |
162 | } | |
163 | ||
164 | if (exp.X_op != O_constant) | |
165 | { | |
166 | *input_line_pointer = '\0'; | |
167 | as_bad (_("field width \"%s\" too complex for a bitfield"), hold); | |
168 | *input_line_pointer = ':'; | |
169 | demand_empty_rest_of_line (); | |
170 | return; | |
171 | } | |
172 | ||
173 | if ((width = exp.X_add_number) > | |
174 | (unsigned int)(BITS_PER_CHAR * nbytes)) | |
175 | { | |
176 | as_warn (_("field width %lu too big to fit in %d bytes: truncated to %d bits"), width, nbytes, (BITS_PER_CHAR * nbytes)); | |
177 | width = BITS_PER_CHAR * nbytes; | |
178 | } /* Too big. */ | |
179 | ||
180 | ||
181 | if (width > bits_available) | |
182 | { | |
183 | /* FIXME-SOMEDAY: backing up and reparsing is wasteful. */ | |
184 | input_line_pointer = hold; | |
185 | exp.X_add_number = value; | |
186 | break; | |
187 | } | |
188 | ||
189 | /* Skip ':'. */ | |
190 | hold = ++input_line_pointer; | |
191 | ||
192 | expression (&exp); | |
193 | if (exp.X_op != O_constant) | |
194 | { | |
195 | char cache = *input_line_pointer; | |
196 | ||
197 | *input_line_pointer = '\0'; | |
198 | as_bad (_("field value \"%s\" too complex for a bitfield"), hold); | |
199 | *input_line_pointer = cache; | |
200 | demand_empty_rest_of_line (); | |
201 | return; | |
202 | } | |
203 | ||
204 | value |= ((~(-1 << width) & exp.X_add_number) | |
205 | << ((BITS_PER_CHAR * nbytes) - bits_available)); | |
206 | ||
207 | if ((bits_available -= width) == 0 | |
208 | || is_it_end_of_statement () | |
209 | || *input_line_pointer != ',') | |
210 | break; | |
211 | ||
212 | hold = ++input_line_pointer; | |
213 | expression (&exp); | |
214 | } | |
215 | ||
216 | exp.X_add_number = value; | |
217 | exp.X_op = O_constant; | |
218 | exp.X_unsigned = 1; | |
219 | } | |
220 | ||
221 | if ((*(input_line_pointer) == '@') && (*(input_line_pointer +1) == 'c')) | |
222 | code_label = 1; | |
223 | emit_expr (&exp, (unsigned int) nbytes); | |
224 | ++c; | |
225 | if ((*(input_line_pointer) == '@') && (*(input_line_pointer +1) == 'c')) | |
226 | { | |
227 | input_line_pointer +=3; | |
228 | break; | |
229 | } | |
230 | } | |
231 | while ((*input_line_pointer++ == ',')); | |
232 | ||
233 | /* Put terminator back into stream. */ | |
234 | input_line_pointer--; | |
235 | ||
236 | demand_empty_rest_of_line (); | |
237 | } | |
238 | ||
239 | ||
240 | /* This table describes all the machine specific pseudo-ops | |
241 | the assembler has to support. The fields are: | |
242 | *** Pseudo-op name without dot. | |
243 | *** Function to call to execute this pseudo-op. | |
244 | *** Integer arg to pass to the function. */ | |
245 | ||
246 | const pseudo_typeS md_pseudo_table[] = | |
247 | { | |
248 | /* In CR16 machine, align is in bytes (not a ptwo boundary). */ | |
249 | {"align", s_align_bytes, 0}, | |
250 | {"long", l_cons, 4 }, | |
251 | {0, 0, 0} | |
252 | }; | |
253 | ||
254 | /* CR16 relaxation table. */ | |
255 | const relax_typeS md_relax_table[] = | |
256 | { | |
257 | /* bCC */ | |
258 | {0xfa, -0x100, 2, 1}, /* 8 */ | |
259 | {0xfffe, -0x10000, 4, 2}, /* 16 */ | |
260 | {0xfffffe, -0x1000000, 6, 0}, /* 24 */ | |
261 | }; | |
262 | ||
263 | /* Return the bit size for a given operand. */ | |
264 | ||
265 | static int | |
266 | get_opbits (operand_type op) | |
267 | { | |
268 | if (op < MAX_OPRD) | |
269 | return cr16_optab[op].bit_size; | |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
274 | /* Return the argument type of a given operand. */ | |
275 | ||
276 | static argtype | |
277 | get_optype (operand_type op) | |
278 | { | |
279 | if (op < MAX_OPRD) | |
280 | return cr16_optab[op].arg_type; | |
281 | else | |
282 | return nullargs; | |
283 | } | |
284 | ||
285 | /* Return the flags of a given operand. */ | |
286 | ||
287 | static int | |
288 | get_opflags (operand_type op) | |
289 | { | |
290 | if (op < MAX_OPRD) | |
291 | return cr16_optab[op].flags; | |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
296 | /* Get the cc code. */ | |
297 | ||
298 | static int | |
299 | get_cc (char *cc_name) | |
300 | { | |
301 | unsigned int i; | |
302 | ||
303 | for (i = 0; i < cr16_num_cc; i++) | |
304 | if (strcmp (cc_name, cr16_b_cond_tab[i]) == 0) | |
305 | return i; | |
306 | ||
307 | return -1; | |
308 | } | |
309 | ||
310 | /* Get the core processor register 'reg_name'. */ | |
311 | ||
312 | static reg | |
313 | get_register (char *reg_name) | |
314 | { | |
315 | const reg_entry *reg; | |
316 | ||
317 | reg = (const reg_entry *) hash_find (reg_hash, reg_name); | |
318 | ||
319 | if (reg != NULL) | |
320 | return reg->value.reg_val; | |
321 | ||
322 | return nullregister; | |
323 | } | |
324 | /* Get the core processor register-pair 'reg_name'. */ | |
325 | ||
326 | static reg | |
327 | get_register_pair (char *reg_name) | |
328 | { | |
329 | const reg_entry *reg; | |
330 | char tmp_rp[16]="\0"; | |
331 | ||
332 | /* Add '(' and ')' to the reg pair, if its not present. */ | |
333 | if (reg_name[0] != '(') | |
334 | { | |
335 | tmp_rp[0] = '('; | |
336 | strcat (tmp_rp, reg_name); | |
337 | strcat (tmp_rp,")"); | |
338 | reg = (const reg_entry *) hash_find (regp_hash, tmp_rp); | |
339 | } | |
340 | else | |
341 | reg = (const reg_entry *) hash_find (regp_hash, reg_name); | |
342 | ||
343 | if (reg != NULL) | |
344 | return reg->value.reg_val; | |
345 | ||
346 | return nullregister; | |
347 | } | |
348 | ||
349 | /* Get the index register 'reg_name'. */ | |
350 | ||
351 | static reg | |
352 | get_index_register (char *reg_name) | |
353 | { | |
354 | const reg_entry *reg; | |
355 | ||
356 | reg = (const reg_entry *) hash_find (reg_hash, reg_name); | |
357 | ||
358 | if ((reg != NULL) | |
359 | && ((reg->value.reg_val == 12) || (reg->value.reg_val == 13))) | |
360 | return reg->value.reg_val; | |
361 | ||
362 | return nullregister; | |
363 | } | |
364 | /* Get the core processor index register-pair 'reg_name'. */ | |
365 | ||
366 | static reg | |
367 | get_index_register_pair (char *reg_name) | |
368 | { | |
369 | const reg_entry *reg; | |
370 | ||
371 | reg = (const reg_entry *) hash_find (regp_hash, reg_name); | |
372 | ||
373 | if (reg != NULL) | |
374 | { | |
375 | if ((reg->value.reg_val != 1) || (reg->value.reg_val != 7) | |
376 | || (reg->value.reg_val != 9) || (reg->value.reg_val > 10)) | |
377 | return reg->value.reg_val; | |
378 | ||
379 | as_bad (_("Unknown register pair - index relative mode: `%d'"), reg->value.reg_val); | |
380 | } | |
381 | ||
382 | return nullregister; | |
383 | } | |
384 | ||
385 | /* Get the processor register 'preg_name'. */ | |
386 | ||
387 | static preg | |
388 | get_pregister (char *preg_name) | |
389 | { | |
390 | const reg_entry *preg; | |
391 | ||
392 | preg = (const reg_entry *) hash_find (preg_hash, preg_name); | |
393 | ||
394 | if (preg != NULL) | |
395 | return preg->value.preg_val; | |
396 | ||
397 | return nullpregister; | |
398 | } | |
399 | ||
400 | /* Get the processor register 'preg_name 32 bit'. */ | |
401 | ||
402 | static preg | |
403 | get_pregisterp (char *preg_name) | |
404 | { | |
405 | const reg_entry *preg; | |
406 | ||
407 | preg = (const reg_entry *) hash_find (pregp_hash, preg_name); | |
408 | ||
409 | if (preg != NULL) | |
410 | return preg->value.preg_val; | |
411 | ||
412 | return nullpregister; | |
413 | } | |
414 | ||
415 | ||
416 | /* Round up a section size to the appropriate boundary. */ | |
417 | ||
418 | valueT | |
419 | md_section_align (segT seg, valueT val) | |
420 | { | |
421 | /* Round .text section to a multiple of 2. */ | |
422 | if (seg == text_section) | |
423 | return (val + 1) & ~1; | |
424 | return val; | |
425 | } | |
426 | ||
427 | /* Parse an operand that is machine-specific (remove '*'). */ | |
428 | ||
429 | void | |
430 | md_operand (expressionS * exp) | |
431 | { | |
432 | char c = *input_line_pointer; | |
433 | ||
434 | switch (c) | |
435 | { | |
436 | case '*': | |
437 | input_line_pointer++; | |
438 | expression (exp); | |
439 | break; | |
440 | default: | |
441 | break; | |
442 | } | |
443 | } | |
444 | ||
445 | /* Reset global variables before parsing a new instruction. */ | |
446 | ||
447 | static void | |
448 | reset_vars (char *op) | |
449 | { | |
450 | cur_arg_num = relocatable = 0; | |
451 | memset (& output_opcode, '\0', sizeof (output_opcode)); | |
452 | ||
453 | /* Save a copy of the original OP (used in error messages). */ | |
454 | strncpy (ins_parse, op, sizeof ins_parse - 1); | |
455 | ins_parse [sizeof ins_parse - 1] = 0; | |
456 | } | |
457 | ||
458 | /* This macro decides whether a particular reloc is an entry in a | |
459 | switch table. It is used when relaxing, because the linker needs | |
460 | to know about all such entries so that it can adjust them if | |
461 | necessary. */ | |
462 | ||
463 | #define SWITCH_TABLE(fix) \ | |
464 | ( (fix)->fx_addsy != NULL \ | |
465 | && (fix)->fx_subsy != NULL \ | |
466 | && S_GET_SEGMENT ((fix)->fx_addsy) == \ | |
467 | S_GET_SEGMENT ((fix)->fx_subsy) \ | |
468 | && S_GET_SEGMENT (fix->fx_addsy) != undefined_section \ | |
469 | && ( (fix)->fx_r_type == BFD_RELOC_CR16_NUM8 \ | |
470 | || (fix)->fx_r_type == BFD_RELOC_CR16_NUM16 \ | |
471 | || (fix)->fx_r_type == BFD_RELOC_CR16_NUM32 \ | |
472 | || (fix)->fx_r_type == BFD_RELOC_CR16_NUM32a)) | |
473 | ||
474 | /* See whether we need to force a relocation into the output file. | |
475 | This is used to force out switch and PC relative relocations when | |
476 | relaxing. */ | |
477 | ||
478 | int | |
479 | cr16_force_relocation (fixS *fix) | |
480 | { | |
481 | /* REVISIT: Check if the "SWITCH_TABLE (fix)" should be added | |
482 | if (generic_force_reloc (fix) || SWITCH_TABLE (fix)) */ | |
483 | if (generic_force_reloc (fix)) | |
484 | return 1; | |
485 | ||
486 | return 0; | |
487 | } | |
488 | ||
489 | /* Record a fixup for a cons expression. */ | |
490 | ||
491 | void | |
492 | cr16_cons_fix_new (fragS *frag, int offset, int len, expressionS *exp) | |
493 | { | |
494 | int rtype; | |
495 | switch (len) | |
496 | { | |
497 | default: rtype = BFD_RELOC_NONE; break; | |
498 | case 1: rtype = BFD_RELOC_CR16_NUM8 ; break; | |
499 | case 2: rtype = BFD_RELOC_CR16_NUM16; break; | |
500 | case 4: | |
501 | if (code_label) | |
502 | { | |
503 | rtype = BFD_RELOC_CR16_NUM32a; | |
504 | code_label = 0; | |
505 | } | |
506 | else | |
507 | rtype = BFD_RELOC_CR16_NUM32; | |
508 | break; | |
509 | } | |
510 | ||
511 | fix_new_exp (frag, offset, len, exp, 0, rtype); | |
512 | } | |
513 | ||
514 | /* Generate a relocation entry for a fixup. */ | |
515 | ||
516 | arelent * | |
517 | tc_gen_reloc (asection *section ATTRIBUTE_UNUSED, fixS * fixP) | |
518 | { | |
519 | arelent * reloc; | |
520 | ||
521 | reloc = xmalloc (sizeof (arelent)); | |
522 | reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); | |
523 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixP->fx_addsy); | |
524 | reloc->address = fixP->fx_frag->fr_address + fixP->fx_where; | |
525 | reloc->addend = fixP->fx_offset; | |
526 | ||
527 | if (fixP->fx_subsy != NULL) | |
528 | { | |
529 | if (SWITCH_TABLE (fixP)) | |
530 | { | |
531 | /* Keep the current difference in the addend. */ | |
532 | reloc->addend = (S_GET_VALUE (fixP->fx_addsy) | |
533 | - S_GET_VALUE (fixP->fx_subsy) + fixP->fx_offset); | |
534 | ||
535 | switch (fixP->fx_r_type) | |
536 | { | |
537 | case BFD_RELOC_CR16_NUM8: | |
538 | fixP->fx_r_type = BFD_RELOC_CR16_NUM8; | |
539 | break; | |
540 | case BFD_RELOC_CR16_NUM16: | |
541 | fixP->fx_r_type = BFD_RELOC_CR16_NUM16; | |
542 | break; | |
543 | case BFD_RELOC_CR16_NUM32: | |
544 | fixP->fx_r_type = BFD_RELOC_CR16_NUM32; | |
545 | break; | |
546 | case BFD_RELOC_CR16_NUM32a: | |
547 | fixP->fx_r_type = BFD_RELOC_CR16_NUM32a; | |
548 | break; | |
549 | default: | |
550 | abort (); | |
551 | break; | |
552 | } | |
553 | } | |
554 | else | |
555 | { | |
556 | /* We only resolve difference expressions in the same section. */ | |
557 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
558 | _("can't resolve `%s' {%s section} - `%s' {%s section}"), | |
559 | fixP->fx_addsy ? S_GET_NAME (fixP->fx_addsy) : "0", | |
560 | segment_name (fixP->fx_addsy | |
561 | ? S_GET_SEGMENT (fixP->fx_addsy) | |
562 | : absolute_section), | |
563 | S_GET_NAME (fixP->fx_subsy), | |
564 | segment_name (S_GET_SEGMENT (fixP->fx_addsy))); | |
565 | } | |
566 | } | |
567 | ||
568 | assert ((int) fixP->fx_r_type > 0); | |
569 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixP->fx_r_type); | |
570 | ||
571 | if (reloc->howto == NULL) | |
572 | { | |
573 | as_bad_where (fixP->fx_file, fixP->fx_line, | |
574 | _("internal error: reloc %d (`%s') not supported by object file format"), | |
575 | fixP->fx_r_type, | |
576 | bfd_get_reloc_code_name (fixP->fx_r_type)); | |
577 | return NULL; | |
578 | } | |
579 | assert (!fixP->fx_pcrel == !reloc->howto->pc_relative); | |
580 | ||
581 | return reloc; | |
582 | } | |
583 | ||
584 | /* Prepare machine-dependent frags for relaxation. */ | |
585 | ||
586 | int | |
587 | md_estimate_size_before_relax (fragS *fragp, asection *seg) | |
588 | { | |
589 | /* If symbol is undefined or located in a different section, | |
590 | select the largest supported relocation. */ | |
591 | relax_substateT subtype; | |
592 | relax_substateT rlx_state[] = {0, 2}; | |
593 | ||
594 | for (subtype = 0; subtype < ARRAY_SIZE (rlx_state); subtype += 2) | |
595 | { | |
596 | if (fragp->fr_subtype == rlx_state[subtype] | |
597 | && (!S_IS_DEFINED (fragp->fr_symbol) | |
598 | || seg != S_GET_SEGMENT (fragp->fr_symbol))) | |
599 | { | |
600 | fragp->fr_subtype = rlx_state[subtype + 1]; | |
601 | break; | |
602 | } | |
603 | } | |
604 | ||
605 | if (fragp->fr_subtype >= ARRAY_SIZE (md_relax_table)) | |
606 | abort (); | |
607 | ||
608 | return md_relax_table[fragp->fr_subtype].rlx_length; | |
609 | } | |
610 | ||
611 | void | |
612 | md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, fragS *fragP) | |
613 | { | |
614 | /* 'opcode' points to the start of the instruction, whether | |
615 | we need to change the instruction's fixed encoding. */ | |
616 | bfd_reloc_code_real_type reloc = BFD_RELOC_NONE; | |
617 | ||
618 | subseg_change (sec, 0); | |
619 | ||
620 | fix_new (fragP, fragP->fr_fix, | |
621 | bfd_get_reloc_size (bfd_reloc_type_lookup (stdoutput, reloc)), | |
622 | fragP->fr_symbol, fragP->fr_offset, 1, reloc); | |
623 | fragP->fr_var = 0; | |
624 | fragP->fr_fix += md_relax_table[fragP->fr_subtype].rlx_length; | |
625 | } | |
626 | ||
627 | /* Process machine-dependent command line options. Called once for | |
628 | each option on the command line that the machine-independent part of | |
629 | GAS does not understand. */ | |
630 | ||
631 | int | |
632 | md_parse_option (int c ATTRIBUTE_UNUSED, char *arg ATTRIBUTE_UNUSED) | |
633 | { | |
634 | return 0; | |
635 | } | |
636 | ||
637 | /* Machine-dependent usage-output. */ | |
638 | ||
639 | void | |
640 | md_show_usage (FILE *stream ATTRIBUTE_UNUSED) | |
641 | { | |
642 | return; | |
643 | } | |
644 | ||
645 | /* Turn a string in input_line_pointer into a floating point constant | |
646 | of type TYPE, and store the appropriate bytes in *LITP. The number | |
647 | of LITTLENUMS emitted is stored in *SIZEP. An error message is | |
648 | returned, or NULL on OK. */ | |
649 | ||
650 | char * | |
651 | md_atof (int type, char *litP, int *sizeP) | |
652 | { | |
653 | int prec; | |
654 | int i; | |
655 | LITTLENUM_TYPE words[4]; | |
656 | char *t; | |
657 | ||
658 | switch (type) | |
659 | { | |
660 | case 'f': | |
661 | prec = 2; | |
662 | break; | |
663 | ||
664 | case 'd': | |
665 | prec = 4; | |
666 | break; | |
667 | ||
668 | default: | |
669 | *sizeP = 0; | |
670 | return _("bad call to md_atof"); | |
671 | } | |
672 | ||
673 | t = atof_ieee (input_line_pointer, type, words); | |
674 | if (t) | |
675 | input_line_pointer = t; | |
676 | ||
677 | *sizeP = prec * 2; | |
678 | ||
679 | if (! target_big_endian) | |
680 | { | |
681 | for (i = prec - 1; i >= 0; i--) | |
682 | { | |
683 | md_number_to_chars (litP, (valueT) words[i], 2); | |
684 | litP += 2; | |
685 | } | |
686 | } | |
687 | else | |
688 | { | |
689 | for (i = 0; i < prec; i++) | |
690 | { | |
691 | md_number_to_chars (litP, (valueT) words[i], 2); | |
692 | litP += 2; | |
693 | } | |
694 | } | |
695 | ||
696 | return NULL; | |
697 | } | |
698 | ||
699 | /* Apply a fixS (fixup of an instruction or data that we didn't have | |
700 | enough info to complete immediately) to the data in a frag. | |
701 | Since linkrelax is nonzero and TC_LINKRELAX_FIXUP is defined to disable | |
702 | relaxation of debug sections, this function is called only when | |
703 | fixuping relocations of debug sections. */ | |
704 | ||
705 | void | |
706 | md_apply_fix (fixS *fixP, valueT *valP, segT seg) | |
707 | { | |
708 | valueT val = * valP; | |
709 | char *buf = fixP->fx_frag->fr_literal + fixP->fx_where; | |
710 | fixP->fx_offset = 0; | |
711 | ||
712 | switch (fixP->fx_r_type) | |
713 | { | |
714 | case BFD_RELOC_CR16_NUM8: | |
715 | bfd_put_8 (stdoutput, (unsigned char) val, buf); | |
716 | break; | |
717 | case BFD_RELOC_CR16_NUM16: | |
718 | bfd_put_16 (stdoutput, val, buf); | |
719 | break; | |
720 | case BFD_RELOC_CR16_NUM32: | |
721 | bfd_put_32 (stdoutput, val, buf); | |
722 | break; | |
723 | case BFD_RELOC_CR16_NUM32a: | |
724 | bfd_put_32 (stdoutput, val, buf); | |
725 | break; | |
726 | default: | |
727 | /* We shouldn't ever get here because linkrelax is nonzero. */ | |
728 | abort (); | |
729 | break; | |
730 | } | |
731 | ||
732 | fixP->fx_done = 0; | |
733 | ||
734 | if (fixP->fx_addsy == NULL | |
735 | && fixP->fx_pcrel == 0) | |
736 | fixP->fx_done = 1; | |
737 | ||
738 | if (fixP->fx_pcrel == 1 | |
739 | && fixP->fx_addsy != NULL | |
740 | && S_GET_SEGMENT (fixP->fx_addsy) == seg) | |
741 | fixP->fx_done = 1; | |
742 | } | |
743 | ||
744 | /* The location from which a PC relative jump should be calculated, | |
745 | given a PC relative reloc. */ | |
746 | ||
747 | long | |
748 | md_pcrel_from (fixS *fixp) | |
749 | { | |
750 | return fixp->fx_frag->fr_address + fixp->fx_where; | |
751 | } | |
752 | ||
753 | static void | |
754 | initialise_reg_hash_table (struct hash_control ** hash_table, | |
755 | const reg_entry * register_table, | |
756 | const unsigned int num_entries) | |
757 | { | |
758 | const reg_entry * reg; | |
759 | const char *hashret; | |
760 | ||
761 | if ((* hash_table = hash_new ()) == NULL) | |
762 | as_fatal (_("Virtual memory exhausted")); | |
763 | ||
764 | for (reg = register_table; | |
765 | reg < (register_table + num_entries); | |
766 | reg++) | |
767 | { | |
768 | hashret = hash_insert (* hash_table, reg->name, (char *) reg); | |
769 | if (hashret) | |
770 | as_fatal (_("Internal Error: Can't hash %s: %s"), | |
771 | reg->name, hashret); | |
772 | } | |
773 | } | |
774 | ||
775 | /* This function is called once, at assembler startup time. This should | |
776 | set up all the tables, etc that the MD part of the assembler needs. */ | |
777 | ||
778 | void | |
779 | md_begin (void) | |
780 | { | |
781 | int i = 0; | |
782 | ||
783 | /* Set up a hash table for the instructions. */ | |
784 | if ((cr16_inst_hash = hash_new ()) == NULL) | |
785 | as_fatal (_("Virtual memory exhausted")); | |
786 | ||
787 | while (cr16_instruction[i].mnemonic != NULL) | |
788 | { | |
789 | const char *hashret; | |
790 | const char *mnemonic = cr16_instruction[i].mnemonic; | |
791 | ||
792 | hashret = hash_insert (cr16_inst_hash, mnemonic, | |
793 | (char *)(cr16_instruction + i)); | |
794 | ||
795 | if (hashret != NULL && *hashret != '\0') | |
796 | as_fatal (_("Can't hash `%s': %s\n"), cr16_instruction[i].mnemonic, | |
797 | *hashret == 0 ? _("(unknown reason)") : hashret); | |
798 | ||
799 | /* Insert unique names into hash table. The CR16 instruction set | |
800 | has many identical opcode names that have different opcodes based | |
801 | on the operands. This hash table then provides a quick index to | |
802 | the first opcode with a particular name in the opcode table. */ | |
803 | do | |
804 | { | |
805 | ++i; | |
806 | } | |
807 | while (cr16_instruction[i].mnemonic != NULL | |
808 | && streq (cr16_instruction[i].mnemonic, mnemonic)); | |
809 | } | |
810 | ||
811 | /* Initialize reg_hash hash table. */ | |
812 | initialise_reg_hash_table (& reg_hash, cr16_regtab, NUMREGS); | |
813 | /* Initialize regp_hash hash table. */ | |
814 | initialise_reg_hash_table (& regp_hash, cr16_regptab, NUMREGPS); | |
815 | /* Initialize preg_hash hash table. */ | |
816 | initialise_reg_hash_table (& preg_hash, cr16_pregtab, NUMPREGS); | |
817 | /* Initialize pregp_hash hash table. */ | |
818 | initialise_reg_hash_table (& pregp_hash, cr16_pregptab, NUMPREGPS); | |
819 | ||
820 | /* Set linkrelax here to avoid fixups in most sections. */ | |
821 | linkrelax = 1; | |
822 | } | |
823 | ||
824 | /* Process constants (immediate/absolute) | |
825 | and labels (jump targets/Memory locations). */ | |
826 | ||
827 | static void | |
828 | process_label_constant (char *str, ins * cr16_ins) | |
829 | { | |
830 | char *saved_input_line_pointer; | |
831 | int symbol_with_at = 0; | |
832 | int symbol_with_s = 0; | |
833 | int symbol_with_m = 0; | |
834 | int symbol_with_l = 0; | |
835 | argument *cur_arg = cr16_ins->arg + cur_arg_num; /* Current argument. */ | |
836 | ||
837 | saved_input_line_pointer = input_line_pointer; | |
838 | input_line_pointer = str; | |
839 | ||
840 | expression (&cr16_ins->exp); | |
841 | ||
842 | switch (cr16_ins->exp.X_op) | |
843 | { | |
844 | case O_big: | |
845 | case O_absent: | |
846 | /* Missing or bad expr becomes absolute 0. */ | |
847 | as_bad (_("missing or invalid displacement expression `%s' taken as 0"), | |
848 | str); | |
849 | cr16_ins->exp.X_op = O_constant; | |
850 | cr16_ins->exp.X_add_number = 0; | |
851 | cr16_ins->exp.X_add_symbol = NULL; | |
852 | cr16_ins->exp.X_op_symbol = NULL; | |
853 | /* Fall through. */ | |
854 | ||
855 | case O_constant: | |
856 | cur_arg->X_op = O_constant; | |
857 | cur_arg->constant = cr16_ins->exp.X_add_number; | |
858 | break; | |
859 | ||
860 | case O_symbol: | |
861 | case O_subtract: | |
862 | case O_add: | |
863 | cur_arg->X_op = O_symbol; | |
864 | cr16_ins->rtype = BFD_RELOC_NONE; | |
865 | relocatable = 1; | |
866 | ||
867 | if (strneq (input_line_pointer, "@c", 2)) | |
868 | symbol_with_at = 1; | |
869 | ||
870 | if (strneq (input_line_pointer, "@l", 2) | |
871 | || strneq (input_line_pointer, ":l", 2)) | |
872 | symbol_with_l = 1; | |
873 | ||
874 | if (strneq (input_line_pointer, "@m", 2) | |
875 | || strneq (input_line_pointer, ":m", 2)) | |
876 | symbol_with_m = 1; | |
877 | ||
878 | if (strneq (input_line_pointer, "@s", 2) | |
879 | || strneq (input_line_pointer, ":s", 2)) | |
880 | symbol_with_s = 1; | |
881 | ||
882 | switch (cur_arg->type) | |
883 | { | |
884 | case arg_cr: | |
885 | if (IS_INSN_TYPE (LD_STOR_INS) || IS_INSN_TYPE (CSTBIT_INS)) | |
886 | { | |
887 | if (cur_arg->size == 20) | |
888 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL20; | |
889 | else | |
890 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL20a; | |
891 | } | |
892 | break; | |
893 | ||
894 | case arg_crp: | |
895 | if (IS_INSN_TYPE (LD_STOR_INS) || IS_INSN_TYPE (CSTBIT_INS)) | |
896 | switch (instruction->size) | |
897 | { | |
898 | case 1: | |
899 | switch (cur_arg->size) | |
900 | { | |
901 | case 0: | |
902 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL0; | |
903 | break; | |
904 | case 4: | |
905 | if (IS_INSN_MNEMONIC ("loadb") || IS_INSN_MNEMONIC ("storb")) | |
906 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL4; | |
907 | else | |
908 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL4a; | |
909 | break; | |
910 | default: break; | |
911 | } | |
912 | break; | |
913 | case 2: | |
914 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL16; | |
915 | break; | |
916 | case 3: | |
917 | if (cur_arg->size == 20) | |
918 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL20; | |
919 | else | |
920 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL20a; | |
921 | break; | |
922 | default: | |
923 | break; | |
924 | } | |
925 | break; | |
926 | ||
927 | case arg_idxr: | |
928 | if (IS_INSN_TYPE (LD_STOR_INS) || IS_INSN_TYPE (CSTBIT_INS)) | |
929 | cr16_ins->rtype = BFD_RELOC_CR16_REGREL20; | |
930 | break; | |
931 | ||
932 | case arg_idxrp: | |
933 | if (IS_INSN_TYPE (LD_STOR_INS) || IS_INSN_TYPE (CSTBIT_INS)) | |
934 | switch (instruction->size) | |
935 | { | |
936 | case 1: cr16_ins->rtype = BFD_RELOC_CR16_REGREL0; break; | |
937 | case 2: cr16_ins->rtype = BFD_RELOC_CR16_REGREL14; break; | |
938 | case 3: cr16_ins->rtype = BFD_RELOC_CR16_REGREL20; break; | |
939 | default: break; | |
940 | } | |
941 | break; | |
942 | ||
943 | case arg_c: | |
944 | if (IS_INSN_MNEMONIC ("bal")) | |
945 | cr16_ins->rtype = BFD_RELOC_CR16_DISP24; | |
946 | else if (IS_INSN_TYPE (BRANCH_INS)) | |
947 | { | |
948 | if (symbol_with_s) | |
949 | cr16_ins->rtype = BFD_RELOC_CR16_DISP8; | |
950 | else if (symbol_with_m) | |
951 | cr16_ins->rtype = BFD_RELOC_CR16_DISP16; | |
952 | else | |
953 | cr16_ins->rtype = BFD_RELOC_CR16_DISP24; | |
954 | } | |
955 | else if (IS_INSN_TYPE (STOR_IMM_INS) || IS_INSN_TYPE (LD_STOR_INS) | |
956 | || IS_INSN_TYPE (CSTBIT_INS)) | |
957 | { | |
958 | if (symbol_with_s) | |
959 | as_bad (_("operand %d: illegal use expression: `%s`"), cur_arg_num + 1, str); | |
960 | if (symbol_with_m) | |
961 | cr16_ins->rtype = BFD_RELOC_CR16_ABS20; | |
962 | else /* Default to (symbol_with_l) */ | |
963 | cr16_ins->rtype = BFD_RELOC_CR16_ABS24; | |
964 | } | |
965 | else if (IS_INSN_TYPE (BRANCH_NEQ_INS)) | |
966 | cr16_ins->rtype = BFD_RELOC_CR16_DISP4; | |
967 | break; | |
968 | ||
969 | case arg_ic: | |
970 | if (IS_INSN_TYPE (ARITH_INS)) | |
971 | { | |
972 | if (symbol_with_s) | |
973 | cr16_ins->rtype = BFD_RELOC_CR16_IMM4; | |
974 | else if (symbol_with_m) | |
975 | cr16_ins->rtype = BFD_RELOC_CR16_IMM20; | |
976 | else if (symbol_with_at) | |
977 | cr16_ins->rtype = BFD_RELOC_CR16_IMM32a; | |
978 | else /* Default to (symbol_with_l) */ | |
979 | cr16_ins->rtype = BFD_RELOC_CR16_IMM32; | |
980 | } | |
981 | else if (IS_INSN_TYPE (ARITH_BYTE_INS)) | |
982 | { | |
983 | cr16_ins->rtype = BFD_RELOC_CR16_IMM16; | |
984 | } | |
985 | break; | |
986 | default: | |
987 | break; | |
988 | } | |
989 | break; | |
990 | ||
991 | default: | |
992 | cur_arg->X_op = cr16_ins->exp.X_op; | |
993 | break; | |
994 | } | |
995 | ||
996 | input_line_pointer = saved_input_line_pointer; | |
997 | return; | |
998 | } | |
999 | ||
1000 | /* Retrieve the opcode image of a given register. | |
1001 | If the register is illegal for the current instruction, | |
1002 | issue an error. */ | |
1003 | ||
1004 | static int | |
1005 | getreg_image (reg r) | |
1006 | { | |
1007 | const reg_entry *reg; | |
1008 | char *reg_name; | |
1009 | int is_procreg = 0; /* Nonzero means argument should be processor reg. */ | |
1010 | ||
1011 | /* Check whether the register is in registers table. */ | |
1012 | if (r < MAX_REG) | |
1013 | reg = cr16_regtab + r; | |
1014 | else /* Register not found. */ | |
1015 | { | |
1016 | as_bad (_("Unknown register: `%d'"), r); | |
1017 | return 0; | |
1018 | } | |
1019 | ||
1020 | reg_name = reg->name; | |
1021 | ||
1022 | /* Issue a error message when register is illegal. */ | |
1023 | #define IMAGE_ERR \ | |
1024 | as_bad (_("Illegal register (`%s') in Instruction: `%s'"), \ | |
1025 | reg_name, ins_parse); \ | |
1026 | break; | |
1027 | ||
1028 | switch (reg->type) | |
1029 | { | |
1030 | case CR16_R_REGTYPE: | |
1031 | if (! is_procreg) | |
1032 | return reg->image; | |
1033 | else | |
1034 | IMAGE_ERR; | |
1035 | ||
1036 | case CR16_P_REGTYPE: | |
1037 | return reg->image; | |
1038 | break; | |
1039 | ||
1040 | default: | |
1041 | IMAGE_ERR; | |
1042 | } | |
1043 | ||
1044 | return 0; | |
1045 | } | |
1046 | ||
1047 | /* Parsing different types of operands | |
1048 | -> constants Immediate/Absolute/Relative numbers | |
1049 | -> Labels Relocatable symbols | |
1050 | -> (reg pair base) Register pair base | |
1051 | -> (rbase) Register base | |
1052 | -> disp(rbase) Register relative | |
1053 | -> [rinx]disp(reg pair) Register index with reg pair mode | |
1054 | -> disp(rbase,ridx,scl) Register index mode. */ | |
1055 | ||
1056 | static void | |
1057 | set_operand (char *operand, ins * cr16_ins) | |
1058 | { | |
1059 | char *operandS; /* Pointer to start of sub-opearand. */ | |
1060 | char *operandE; /* Pointer to end of sub-opearand. */ | |
1061 | ||
1062 | argument *cur_arg = &cr16_ins->arg[cur_arg_num]; /* Current argument. */ | |
1063 | ||
1064 | /* Initialize pointers. */ | |
1065 | operandS = operandE = operand; | |
1066 | ||
1067 | switch (cur_arg->type) | |
1068 | { | |
1069 | case arg_ic: /* Case $0x18. */ | |
1070 | operandS++; | |
1071 | case arg_c: /* Case 0x18. */ | |
1072 | /* Set constant. */ | |
1073 | process_label_constant (operandS, cr16_ins); | |
1074 | ||
1075 | if (cur_arg->type != arg_ic) | |
1076 | cur_arg->type = arg_c; | |
1077 | break; | |
1078 | ||
1079 | case arg_icr: /* Case $0x18(r1). */ | |
1080 | operandS++; | |
1081 | case arg_cr: /* Case 0x18(r1). */ | |
1082 | /* Set displacement constant. */ | |
1083 | while (*operandE != '(') | |
1084 | operandE++; | |
1085 | *operandE = '\0'; | |
1086 | process_label_constant (operandS, cr16_ins); | |
1087 | operandS = operandE; | |
1088 | case arg_rbase: /* Case (r1) or (r1,r0). */ | |
1089 | operandS++; | |
1090 | /* Set register base. */ | |
1091 | while (*operandE != ')') | |
1092 | operandE++; | |
1093 | *operandE = '\0'; | |
1094 | if ((cur_arg->r = get_register (operandS)) == nullregister) | |
1095 | as_bad (_("Illegal register `%s' in Instruction `%s'"), | |
1096 | operandS, ins_parse); | |
1097 | ||
1098 | /* set the arg->rp, if reg is "r12" or "r13" or "14" or "15" */ | |
1099 | if ((cur_arg->type != arg_rbase) | |
1100 | && ((getreg_image (cur_arg->r) == 12) | |
1101 | || (getreg_image (cur_arg->r) == 13) | |
1102 | || (getreg_image (cur_arg->r) == 14) | |
1103 | || (getreg_image (cur_arg->r) == 15))) | |
1104 | { | |
1105 | cur_arg->type = arg_crp; | |
1106 | cur_arg->rp = cur_arg->r; | |
1107 | } | |
1108 | break; | |
1109 | ||
1110 | case arg_crp: /* Case 0x18(r1,r0). */ | |
1111 | /* Set displacement constant. */ | |
1112 | while (*operandE != '(') | |
1113 | operandE++; | |
1114 | *operandE = '\0'; | |
1115 | process_label_constant (operandS, cr16_ins); | |
1116 | operandS = operandE; | |
1117 | operandS++; | |
1118 | /* Set register pair base. */ | |
1119 | while (*operandE != ')') | |
1120 | operandE++; | |
1121 | *operandE = '\0'; | |
1122 | if ((cur_arg->rp = get_register_pair (operandS)) == nullregister) | |
1123 | as_bad (_("Illegal register pair `%s' in Instruction `%s'"), | |
1124 | operandS, ins_parse); | |
1125 | break; | |
1126 | ||
1127 | case arg_idxr: | |
1128 | /* Set register pair base. */ | |
1129 | if ((strchr (operandS,'(') != NULL)) | |
1130 | { | |
1131 | while ((*operandE != '(') && (! ISSPACE (*operandE))) | |
1132 | operandE++; | |
1133 | if ((cur_arg->rp = get_index_register_pair (operandE)) == nullregister) | |
1134 | as_bad (_("Illegal register pair `%s' in Instruction `%s'"), | |
1135 | operandS, ins_parse); | |
1136 | *operandE++ = '\0'; | |
1137 | cur_arg->type = arg_idxrp; | |
1138 | } | |
1139 | else | |
1140 | cur_arg->rp = -1; | |
1141 | ||
1142 | operandE = operandS; | |
1143 | /* Set displacement constant. */ | |
1144 | while (*operandE != ']') | |
1145 | operandE++; | |
1146 | process_label_constant (++operandE, cr16_ins); | |
1147 | *operandE++ = '\0'; | |
1148 | operandE = operandS; | |
1149 | ||
1150 | /* Set index register . */ | |
1151 | operandS = strchr (operandE,'['); | |
1152 | if (operandS != NULL) | |
1153 | { /* Eliminate '[', detach from rest of operand. */ | |
1154 | *operandS++ = '\0'; | |
1155 | ||
1156 | operandE = strchr (operandS, ']'); | |
1157 | ||
1158 | if (operandE == NULL) | |
1159 | as_bad (_("unmatched '['")); | |
1160 | else | |
1161 | { /* Eliminate ']' and make sure it was the last thing | |
1162 | in the string. */ | |
1163 | *operandE = '\0'; | |
1164 | if (*(operandE + 1) != '\0') | |
1165 | as_bad (_("garbage after index spec ignored")); | |
1166 | } | |
1167 | } | |
1168 | ||
1169 | if ((cur_arg->i_r = get_index_register (operandS)) == nullregister) | |
1170 | as_bad (_("Illegal register `%s' in Instruction `%s'"), | |
1171 | operandS, ins_parse); | |
1172 | *operandE = '\0'; | |
1173 | *operandS = '\0'; | |
1174 | break; | |
1175 | ||
1176 | default: | |
1177 | break; | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | /* Parse a single operand. | |
1182 | operand - Current operand to parse. | |
1183 | cr16_ins - Current assembled instruction. */ | |
1184 | ||
1185 | static void | |
1186 | parse_operand (char *operand, ins * cr16_ins) | |
1187 | { | |
1188 | int ret_val; | |
1189 | argument *cur_arg = cr16_ins->arg + cur_arg_num; /* Current argument. */ | |
1190 | ||
1191 | /* Initialize the type to NULL before parsing. */ | |
1192 | cur_arg->type = nullargs; | |
1193 | ||
1194 | /* Check whether this is a condition code . */ | |
1195 | if ((IS_INSN_MNEMONIC ("b")) && ((ret_val = get_cc (operand)) != -1)) | |
1196 | { | |
1197 | cur_arg->type = arg_cc; | |
1198 | cur_arg->cc = ret_val; | |
1199 | cur_arg->X_op = O_register; | |
1200 | return; | |
1201 | } | |
1202 | ||
1203 | /* Check whether this is a general processor register. */ | |
1204 | if ((ret_val = get_register (operand)) != nullregister) | |
1205 | { | |
1206 | cur_arg->type = arg_r; | |
1207 | cur_arg->r = ret_val; | |
1208 | cur_arg->X_op = 0; | |
1209 | return; | |
1210 | } | |
1211 | ||
1212 | /* Check whether this is a general processor register pair. */ | |
1213 | if ((operand[0] == '(') | |
1214 | && ((ret_val = get_register_pair (operand)) != nullregister)) | |
1215 | { | |
1216 | cur_arg->type = arg_rp; | |
1217 | cur_arg->rp = ret_val; | |
1218 | cur_arg->X_op = O_register; | |
1219 | return; | |
1220 | } | |
1221 | ||
1222 | /* Check whether the operand is a processor register. | |
1223 | For "lprd" and "sprd" instruction, only 32 bit | |
1224 | processor registers used. */ | |
1225 | if (!(IS_INSN_MNEMONIC ("lprd") || (IS_INSN_MNEMONIC ("sprd"))) | |
1226 | && ((ret_val = get_pregister (operand)) != nullpregister)) | |
1227 | { | |
1228 | cur_arg->type = arg_pr; | |
1229 | cur_arg->pr = ret_val; | |
1230 | cur_arg->X_op = O_register; | |
1231 | return; | |
1232 | } | |
1233 | ||
1234 | /* Check whether this is a processor register - 32 bit. */ | |
1235 | if ((ret_val = get_pregisterp (operand)) != nullpregister) | |
1236 | { | |
1237 | cur_arg->type = arg_prp; | |
1238 | cur_arg->prp = ret_val; | |
1239 | cur_arg->X_op = O_register; | |
1240 | return; | |
1241 | } | |
1242 | ||
1243 | /* Deal with special characters. */ | |
1244 | switch (operand[0]) | |
1245 | { | |
1246 | case '$': | |
1247 | if (strchr (operand, '(') != NULL) | |
1248 | cur_arg->type = arg_icr; | |
1249 | else | |
1250 | cur_arg->type = arg_ic; | |
1251 | goto set_params; | |
1252 | break; | |
1253 | ||
1254 | case '(': | |
1255 | cur_arg->type = arg_rbase; | |
1256 | goto set_params; | |
1257 | break; | |
1258 | ||
1259 | case '[': | |
1260 | cur_arg->type = arg_idxr; | |
1261 | goto set_params; | |
1262 | break; | |
1263 | ||
1264 | default: | |
1265 | break; | |
1266 | } | |
1267 | ||
1268 | if (strchr (operand, '(') != NULL) | |
1269 | { | |
1270 | if (strchr (operand, ',') != NULL | |
1271 | && (strchr (operand, ',') > strchr (operand, '('))) | |
1272 | cur_arg->type = arg_crp; | |
1273 | else | |
1274 | cur_arg->type = arg_cr; | |
1275 | } | |
1276 | else | |
1277 | cur_arg->type = arg_c; | |
1278 | ||
1279 | /* Parse an operand according to its type. */ | |
1280 | set_params: | |
1281 | cur_arg->constant = 0; | |
1282 | set_operand (operand, cr16_ins); | |
1283 | } | |
1284 | ||
1285 | /* Parse the various operands. Each operand is then analyzed to fillup | |
1286 | the fields in the cr16_ins data structure. */ | |
1287 | ||
1288 | static void | |
1289 | parse_operands (ins * cr16_ins, char *operands) | |
1290 | { | |
1291 | char *operandS; /* Operands string. */ | |
1292 | char *operandH, *operandT; /* Single operand head/tail pointers. */ | |
1293 | int allocated = 0; /* Indicates a new operands string was allocated.*/ | |
1294 | char *operand[MAX_OPERANDS];/* Separating the operands. */ | |
1295 | int op_num = 0; /* Current operand number we are parsing. */ | |
1296 | int bracket_flag = 0; /* Indicates a bracket '(' was found. */ | |
1297 | int sq_bracket_flag = 0; /* Indicates a square bracket '[' was found. */ | |
1298 | ||
1299 | /* Preprocess the list of registers, if necessary. */ | |
1300 | operandS = operandH = operandT = operands; | |
1301 | ||
1302 | while (*operandT != '\0') | |
1303 | { | |
1304 | if (*operandT == ',' && bracket_flag != 1 && sq_bracket_flag != 1) | |
1305 | { | |
1306 | *operandT++ = '\0'; | |
1307 | operand[op_num++] = strdup (operandH); | |
1308 | operandH = operandT; | |
1309 | continue; | |
1310 | } | |
1311 | ||
1312 | if (*operandT == ' ') | |
1313 | as_bad (_("Illegal operands (whitespace): `%s'"), ins_parse); | |
1314 | ||
1315 | if (*operandT == '(') | |
1316 | bracket_flag = 1; | |
1317 | else if (*operandT == '[') | |
1318 | sq_bracket_flag = 1; | |
1319 | ||
1320 | if (*operandT == ')') | |
1321 | { | |
1322 | if (bracket_flag) | |
1323 | bracket_flag = 0; | |
1324 | else | |
1325 | as_fatal (_("Missing matching brackets : `%s'"), ins_parse); | |
1326 | } | |
1327 | else if (*operandT == ']') | |
1328 | { | |
1329 | if (sq_bracket_flag) | |
1330 | sq_bracket_flag = 0; | |
1331 | else | |
1332 | as_fatal (_("Missing matching brackets : `%s'"), ins_parse); | |
1333 | } | |
1334 | ||
1335 | if (bracket_flag == 1 && *operandT == ')') | |
1336 | bracket_flag = 0; | |
1337 | else if (sq_bracket_flag == 1 && *operandT == ']') | |
1338 | sq_bracket_flag = 0; | |
1339 | ||
1340 | operandT++; | |
1341 | } | |
1342 | ||
1343 | /* Adding the last operand. */ | |
1344 | operand[op_num++] = strdup (operandH); | |
1345 | cr16_ins->nargs = op_num; | |
1346 | ||
1347 | /* Verifying correct syntax of operands (all brackets should be closed). */ | |
1348 | if (bracket_flag || sq_bracket_flag) | |
1349 | as_fatal (_("Missing matching brackets : `%s'"), ins_parse); | |
1350 | ||
1351 | /* Now we parse each operand separately. */ | |
1352 | for (op_num = 0; op_num < cr16_ins->nargs; op_num++) | |
1353 | { | |
1354 | cur_arg_num = op_num; | |
1355 | parse_operand (operand[op_num], cr16_ins); | |
1356 | free (operand[op_num]); | |
1357 | } | |
1358 | ||
1359 | if (allocated) | |
1360 | free (operandS); | |
1361 | } | |
1362 | ||
1363 | /* Get the trap index in dispatch table, given its name. | |
1364 | This routine is used by assembling the 'excp' instruction. */ | |
1365 | ||
1366 | static int | |
1367 | gettrap (char *s) | |
1368 | { | |
1369 | const trap_entry *trap; | |
1370 | ||
1371 | for (trap = cr16_traps; trap < (cr16_traps + NUMTRAPS); trap++) | |
1372 | if (strcasecmp (trap->name, s) == 0) | |
1373 | return trap->entry; | |
1374 | ||
1375 | /* To make compatable with CR16 4.1 tools, the below 3-lines of | |
1376 | * code added. Refer: Development Tracker item #123 */ | |
1377 | for (trap = cr16_traps; trap < (cr16_traps + NUMTRAPS); trap++) | |
1378 | if (trap->entry == (unsigned int) atoi (s)) | |
1379 | return trap->entry; | |
1380 | ||
1381 | as_bad (_("Unknown exception: `%s'"), s); | |
1382 | return 0; | |
1383 | } | |
1384 | ||
1385 | /* Top level module where instruction parsing starts. | |
1386 | cr16_ins - data structure holds some information. | |
1387 | operands - holds the operands part of the whole instruction. */ | |
1388 | ||
1389 | static void | |
1390 | parse_insn (ins *insn, char *operands) | |
1391 | { | |
1392 | int i; | |
1393 | ||
1394 | /* Handle instructions with no operands. */ | |
1395 | for (i = 0; cr16_no_op_insn[i] != NULL; i++) | |
1396 | { | |
1397 | if (streq (cr16_no_op_insn[i], instruction->mnemonic)) | |
1398 | { | |
1399 | insn->nargs = 0; | |
1400 | return; | |
1401 | } | |
1402 | } | |
1403 | ||
1404 | /* Handle 'excp' instructions. */ | |
1405 | if (IS_INSN_MNEMONIC ("excp")) | |
1406 | { | |
1407 | insn->nargs = 1; | |
1408 | insn->arg[0].type = arg_ic; | |
1409 | insn->arg[0].constant = gettrap (operands); | |
1410 | insn->arg[0].X_op = O_constant; | |
1411 | return; | |
1412 | } | |
1413 | ||
1414 | if (operands != NULL) | |
1415 | parse_operands (insn, operands); | |
1416 | } | |
1417 | ||
1418 | /* bCC instruction requires special handling. */ | |
1419 | static char * | |
1420 | get_b_cc (char * op) | |
1421 | { | |
1422 | unsigned int i; | |
1423 | char op1[5]; | |
1424 | ||
1425 | for (i = 1; i < strlen (op); i++) | |
1426 | op1[i-1] = op[i]; | |
1427 | ||
1428 | op1[i-1] = '\0'; | |
1429 | ||
1430 | for (i = 0; i < cr16_num_cc ; i++) | |
1431 | if (streq (op1, cr16_b_cond_tab[i])) | |
1432 | return (char *) cr16_b_cond_tab[i]; | |
1433 | ||
1434 | return NULL; | |
1435 | } | |
1436 | ||
1437 | /* bCC instruction requires special handling. */ | |
1438 | static int | |
1439 | is_bcc_insn (char * op) | |
1440 | { | |
1441 | if (!(streq (op, "bal") || streq (op, "beq0b") || streq (op, "bnq0b") | |
1442 | || streq (op, "beq0w") || streq (op, "bnq0w"))) | |
1443 | if ((op[0] == 'b') && (get_b_cc (op) != NULL)) | |
1444 | return 1; | |
1445 | return 0; | |
1446 | } | |
1447 | ||
1448 | /* Cinv instruction requires special handling. */ | |
1449 | ||
1450 | static int | |
1451 | check_cinv_options (char * operand) | |
1452 | { | |
1453 | char *p = operand; | |
1454 | int i_used = 0, u_used = 0, d_used = 0; | |
1455 | ||
1456 | while (*++p != ']') | |
1457 | { | |
1458 | if (*p == ',' || *p == ' ') | |
1459 | continue; | |
1460 | ||
1461 | else if (*p == 'i') | |
1462 | i_used = 1; | |
1463 | else if (*p == 'u') | |
1464 | u_used = 1; | |
1465 | else if (*p == 'd') | |
1466 | d_used = 1; | |
1467 | else | |
1468 | as_bad (_("Illegal `cinv' parameter: `%c'"), *p); | |
1469 | } | |
1470 | ||
1471 | return 0; | |
1472 | } | |
1473 | ||
1474 | /* Retrieve the opcode image of a given register pair. | |
1475 | If the register is illegal for the current instruction, | |
1476 | issue an error. */ | |
1477 | ||
1478 | static int | |
1479 | getregp_image (reg r) | |
1480 | { | |
1481 | const reg_entry *reg; | |
1482 | char *reg_name; | |
1483 | ||
1484 | /* Check whether the register is in registers table. */ | |
1485 | if (r < MAX_REG) | |
1486 | reg = cr16_regptab + r; | |
1487 | /* Register not found. */ | |
1488 | else | |
1489 | { | |
1490 | as_bad (_("Unknown register pair: `%d'"), r); | |
1491 | return 0; | |
1492 | } | |
1493 | ||
1494 | reg_name = reg->name; | |
1495 | ||
1496 | /* Issue a error message when register pair is illegal. */ | |
1497 | #define RPAIR_IMAGE_ERR \ | |
1498 | as_bad (_("Illegal register pair (`%s') in Instruction: `%s'"), \ | |
1499 | reg_name, ins_parse); \ | |
1500 | break; | |
1501 | ||
1502 | switch (reg->type) | |
1503 | { | |
1504 | case CR16_RP_REGTYPE: | |
1505 | return reg->image; | |
1506 | default: | |
1507 | RPAIR_IMAGE_ERR; | |
1508 | } | |
1509 | ||
1510 | return 0; | |
1511 | } | |
1512 | ||
1513 | /* Retrieve the opcode image of a given index register pair. | |
1514 | If the register is illegal for the current instruction, | |
1515 | issue an error. */ | |
1516 | ||
1517 | static int | |
1518 | getidxregp_image (reg r) | |
1519 | { | |
1520 | const reg_entry *reg; | |
1521 | char *reg_name; | |
1522 | ||
1523 | /* Check whether the register is in registers table. */ | |
1524 | if (r < MAX_REG) | |
1525 | reg = cr16_regptab + r; | |
1526 | /* Register not found. */ | |
1527 | else | |
1528 | { | |
1529 | as_bad (_("Unknown register pair: `%d'"), r); | |
1530 | return 0; | |
1531 | } | |
1532 | ||
1533 | reg_name = reg->name; | |
1534 | ||
1535 | /* Issue a error message when register pair is illegal. */ | |
1536 | #define IDX_RPAIR_IMAGE_ERR \ | |
1537 | as_bad (_("Illegal index register pair (`%s') in Instruction: `%s'"), \ | |
1538 | reg_name, ins_parse); \ | |
1539 | ||
1540 | if (reg->type == CR16_RP_REGTYPE) | |
1541 | { | |
1542 | switch (reg->image) | |
1543 | { | |
1544 | case 0: return 0; break; | |
1545 | case 2: return 1; break; | |
1546 | case 4: return 2; break; | |
1547 | case 6: return 3; break; | |
1548 | case 8: return 4; break; | |
1549 | case 10: return 5; break; | |
1550 | case 3: return 6; break; | |
1551 | case 5: return 7; break; | |
1552 | default: | |
1553 | break; | |
1554 | } | |
1555 | } | |
1556 | ||
1557 | IDX_RPAIR_IMAGE_ERR; | |
1558 | return 0; | |
1559 | } | |
1560 | ||
1561 | /* Retrieve the opcode image of a given processort register. | |
1562 | If the register is illegal for the current instruction, | |
1563 | issue an error. */ | |
1564 | static int | |
1565 | getprocreg_image (reg r) | |
1566 | { | |
1567 | const reg_entry *reg; | |
1568 | char *reg_name; | |
1569 | ||
1570 | /* Check whether the register is in registers table. */ | |
1571 | if (r < MAX_PREG) | |
1572 | reg = &cr16_pregtab[r - MAX_REG]; | |
1573 | /* Register not found. */ | |
1574 | else | |
1575 | { | |
1576 | as_bad (_("Unknown processor register : `%d'"), r); | |
1577 | return 0; | |
1578 | } | |
1579 | ||
1580 | reg_name = reg->name; | |
1581 | ||
1582 | /* Issue a error message when register pair is illegal. */ | |
1583 | #define PROCREG_IMAGE_ERR \ | |
1584 | as_bad (_("Illegal processor register (`%s') in Instruction: `%s'"), \ | |
1585 | reg_name, ins_parse); \ | |
1586 | break; | |
1587 | ||
1588 | switch (reg->type) | |
1589 | { | |
1590 | case CR16_P_REGTYPE: | |
1591 | return reg->image; | |
1592 | default: | |
1593 | PROCREG_IMAGE_ERR; | |
1594 | } | |
1595 | ||
1596 | return 0; | |
1597 | } | |
1598 | ||
1599 | /* Retrieve the opcode image of a given processort register. | |
1600 | If the register is illegal for the current instruction, | |
1601 | issue an error. */ | |
1602 | static int | |
1603 | getprocregp_image (reg r) | |
1604 | { | |
1605 | const reg_entry *reg; | |
1606 | char *reg_name; | |
1607 | int pregptab_disp = 0; | |
1608 | ||
1609 | /* Check whether the register is in registers table. */ | |
1610 | if (r < MAX_PREG) | |
1611 | { | |
1612 | r = r - MAX_REG; | |
1613 | switch (r) | |
1614 | { | |
1615 | case 4: pregptab_disp = 1; break; | |
1616 | case 6: pregptab_disp = 2; break; | |
1617 | case 8: | |
1618 | case 9: | |
1619 | case 10: | |
1620 | pregptab_disp = 3; break; | |
1621 | case 12: | |
1622 | pregptab_disp = 4; break; | |
1623 | case 14: | |
1624 | pregptab_disp = 5; break; | |
1625 | default: break; | |
1626 | } | |
1627 | reg = &cr16_pregptab[r - pregptab_disp]; | |
1628 | } | |
1629 | /* Register not found. */ | |
1630 | else | |
1631 | { | |
1632 | as_bad (_("Unknown processor register (32 bit) : `%d'"), r); | |
1633 | return 0; | |
1634 | } | |
1635 | ||
1636 | reg_name = reg->name; | |
1637 | ||
1638 | /* Issue a error message when register pair is illegal. */ | |
1639 | #define PROCREGP_IMAGE_ERR \ | |
1640 | as_bad (_("Illegal 32 bit - processor register (`%s') in Instruction: `%s'"),\ | |
1641 | reg_name, ins_parse); \ | |
1642 | break; | |
1643 | ||
1644 | switch (reg->type) | |
1645 | { | |
1646 | case CR16_P_REGTYPE: | |
1647 | return reg->image; | |
1648 | default: | |
1649 | PROCREGP_IMAGE_ERR; | |
1650 | } | |
1651 | ||
1652 | return 0; | |
1653 | } | |
1654 | ||
1655 | /* Routine used to represent integer X using NBITS bits. */ | |
1656 | ||
1657 | static long | |
1658 | getconstant (long x, int nbits) | |
1659 | { | |
1660 | /* The following expression avoids overflow if | |
1661 | 'nbits' is the number of bits in 'bfd_vma'. */ | |
1662 | return (x & ((((1 << (nbits - 1)) - 1) << 1) | 1)); | |
1663 | } | |
1664 | ||
1665 | /* Print a constant value to 'output_opcode': | |
1666 | ARG holds the operand's type and value. | |
1667 | SHIFT represents the location of the operand to be print into. | |
1668 | NBITS determines the size (in bits) of the constant. */ | |
1669 | ||
1670 | static void | |
1671 | print_constant (int nbits, int shift, argument *arg) | |
1672 | { | |
1673 | unsigned long mask = 0; | |
1674 | ||
1675 | long constant = getconstant (arg->constant, nbits); | |
1676 | ||
1677 | switch (nbits) | |
1678 | { | |
1679 | case 32: | |
1680 | case 28: | |
1681 | /* mask the upper part of the constant, that is, the bits | |
1682 | going to the lowest byte of output_opcode[0]. | |
1683 | The upper part of output_opcode[1] is always filled, | |
1684 | therefore it is always masked with 0xFFFF. */ | |
1685 | mask = (1 << (nbits - 16)) - 1; | |
1686 | /* Divide the constant between two consecutive words : | |
1687 | 0 1 2 3 | |
1688 | +---------+---------+---------+---------+ | |
1689 | | | X X X X | x X x X | | | |
1690 | +---------+---------+---------+---------+ | |
1691 | output_opcode[0] output_opcode[1] */ | |
1692 | ||
1693 | CR16_PRINT (0, (constant >> WORD_SHIFT) & mask, 0); | |
1694 | CR16_PRINT (1, (constant & 0xFFFF), WORD_SHIFT); | |
1695 | break; | |
1696 | ||
1697 | case 21: | |
1698 | if ((nbits == 21) && (IS_INSN_TYPE (LD_STOR_INS))) nbits = 20; | |
1699 | case 24: | |
1700 | case 22: | |
1701 | case 20: | |
1702 | /* mask the upper part of the constant, that is, the bits | |
1703 | going to the lowest byte of output_opcode[0]. | |
1704 | The upper part of output_opcode[1] is always filled, | |
1705 | therefore it is always masked with 0xFFFF. */ | |
1706 | mask = (1 << (nbits - 16)) - 1; | |
1707 | /* Divide the constant between two consecutive words : | |
1708 | 0 1 2 3 | |
1709 | +---------+---------+---------+---------+ | |
1710 | | | X X X X | - X - X | | | |
1711 | +---------+---------+---------+---------+ | |
1712 | output_opcode[0] output_opcode[1] */ | |
1713 | ||
1714 | if ((instruction->size > 2) && (shift == WORD_SHIFT)) | |
1715 | { | |
1716 | if (arg->type == arg_idxrp) | |
1717 | { | |
1718 | CR16_PRINT (0, ((constant >> WORD_SHIFT) & mask) << 8, 0); | |
1719 | CR16_PRINT (1, (constant & 0xFFFF), WORD_SHIFT); | |
1720 | } | |
1721 | else | |
1722 | { | |
1723 | CR16_PRINT (0, (((((constant >> WORD_SHIFT) & mask) << 8) & 0x0f00) | ((((constant >> WORD_SHIFT) & mask) >> 4) & 0xf)),0); | |
1724 | CR16_PRINT (1, (constant & 0xFFFF), WORD_SHIFT); | |
1725 | } | |
1726 | } | |
1727 | else | |
1728 | CR16_PRINT (0, constant, shift); | |
1729 | break; | |
1730 | ||
1731 | case 14: | |
1732 | if (arg->type == arg_idxrp) | |
1733 | { | |
1734 | if (instruction->size == 2) | |
1735 | { | |
1736 | CR16_PRINT (0, ((constant)&0xf), shift); // 0-3 bits | |
1737 | CR16_PRINT (0, ((constant>>4)&0x3), (shift+20)); // 4-5 bits | |
1738 | CR16_PRINT (0, ((constant>>6)&0x3), (shift+14)); // 6-7 bits | |
1739 | CR16_PRINT (0, ((constant>>8)&0x3f), (shift+8)); // 8-13 bits | |
1740 | } | |
1741 | else | |
1742 | CR16_PRINT (0, constant, shift); | |
1743 | } | |
1744 | break; | |
1745 | ||
1746 | case 16: | |
1747 | case 12: | |
1748 | /* When instruction size is 3 and 'shift' is 16, a 16-bit constant is | |
1749 | always filling the upper part of output_opcode[1]. If we mistakenly | |
1750 | write it to output_opcode[0], the constant prefix (that is, 'match') | |
1751 | will be overriden. | |
1752 | 0 1 2 3 | |
1753 | +---------+---------+---------+---------+ | |
1754 | | 'match' | | X X X X | | | |
1755 | +---------+---------+---------+---------+ | |
1756 | output_opcode[0] output_opcode[1] */ | |
1757 | ||
1758 | if ((instruction->size > 2) && (shift == WORD_SHIFT)) | |
1759 | CR16_PRINT (1, constant, WORD_SHIFT); | |
1760 | else | |
1761 | CR16_PRINT (0, constant, shift); | |
1762 | break; | |
1763 | ||
1764 | case 8: | |
1765 | CR16_PRINT (0, ((constant/2)&0xf), shift); | |
1766 | CR16_PRINT (0, ((constant/2)>>4), (shift+8)); | |
1767 | break; | |
1768 | ||
1769 | default: | |
1770 | CR16_PRINT (0, constant, shift); | |
1771 | break; | |
1772 | } | |
1773 | } | |
1774 | ||
1775 | /* Print an operand to 'output_opcode', which later on will be | |
1776 | printed to the object file: | |
1777 | ARG holds the operand's type, size and value. | |
1778 | SHIFT represents the printing location of operand. | |
1779 | NBITS determines the size (in bits) of a constant operand. */ | |
1780 | ||
1781 | static void | |
1782 | print_operand (int nbits, int shift, argument *arg) | |
1783 | { | |
1784 | switch (arg->type) | |
1785 | { | |
1786 | case arg_cc: | |
1787 | CR16_PRINT (0, arg->cc, shift); | |
1788 | break; | |
1789 | ||
1790 | case arg_r: | |
1791 | CR16_PRINT (0, getreg_image (arg->r), shift); | |
1792 | break; | |
1793 | ||
1794 | case arg_rp: | |
1795 | CR16_PRINT (0, getregp_image (arg->rp), shift); | |
1796 | break; | |
1797 | ||
1798 | case arg_pr: | |
1799 | CR16_PRINT (0, getprocreg_image (arg->pr), shift); | |
1800 | break; | |
1801 | ||
1802 | case arg_prp: | |
1803 | CR16_PRINT (0, getprocregp_image (arg->prp), shift); | |
1804 | break; | |
1805 | ||
1806 | case arg_idxrp: | |
1807 | /* 16 12 8 6 0 | |
1808 | +-----------------------------+ | |
1809 | | r_index | disp | rp_base | | |
1810 | +-----------------------------+ */ | |
1811 | ||
1812 | if (instruction->size == 3) | |
1813 | { | |
1814 | CR16_PRINT (0, getidxregp_image (arg->rp), 0); | |
1815 | if (getreg_image (arg->i_r) == 12) | |
1816 | CR16_PRINT (0, 0, 3); | |
1817 | else | |
1818 | CR16_PRINT (0, 1, 3); | |
1819 | } | |
1820 | else | |
1821 | { | |
1822 | CR16_PRINT (0, getidxregp_image (arg->rp), 16); | |
1823 | if (getreg_image (arg->i_r) == 12) | |
1824 | CR16_PRINT (0, 0, 19); | |
1825 | else | |
1826 | CR16_PRINT (0, 1, 19); | |
1827 | } | |
1828 | print_constant (nbits, shift, arg); | |
1829 | break; | |
1830 | ||
1831 | case arg_idxr: | |
1832 | if (getreg_image (arg->i_r) == 12) | |
1833 | if (IS_INSN_MNEMONIC ("cbitb") || IS_INSN_MNEMONIC ("sbitb") | |
1834 | || IS_INSN_MNEMONIC ("tbitb")) | |
1835 | CR16_PRINT (0, 0, 23); | |
1836 | else CR16_PRINT (0, 0, 24); | |
1837 | else | |
1838 | if (IS_INSN_MNEMONIC ("cbitb") || IS_INSN_MNEMONIC ("sbitb") | |
1839 | || IS_INSN_MNEMONIC ("tbitb")) | |
1840 | CR16_PRINT (0, 1, 23); | |
1841 | else CR16_PRINT (0, 1, 24); | |
1842 | ||
1843 | print_constant (nbits, shift, arg); | |
1844 | break; | |
1845 | ||
1846 | case arg_ic: | |
1847 | case arg_c: | |
1848 | print_constant (nbits, shift, arg); | |
1849 | break; | |
1850 | ||
1851 | case arg_rbase: | |
1852 | CR16_PRINT (0, getreg_image (arg->r), shift); | |
1853 | break; | |
1854 | ||
1855 | case arg_cr: | |
1856 | print_constant (nbits, shift , arg); | |
1857 | /* Add the register argument to the output_opcode. */ | |
1858 | CR16_PRINT (0, getreg_image (arg->r), (shift+16)); | |
1859 | break; | |
1860 | ||
1861 | case arg_crp: | |
1862 | print_constant (nbits, shift , arg); | |
1863 | if (instruction->size > 1) | |
1864 | CR16_PRINT (0, getregp_image (arg->rp), (shift + 16)); | |
1865 | else if (IS_INSN_TYPE (LD_STOR_INS) || (IS_INSN_TYPE (CSTBIT_INS))) | |
1866 | { | |
1867 | if (instruction->size == 2) | |
1868 | CR16_PRINT (0, getregp_image (arg->rp), (shift - 8)); | |
1869 | else if (instruction->size == 1) | |
1870 | CR16_PRINT (0, getregp_image (arg->rp), 16); | |
1871 | } | |
1872 | else | |
1873 | CR16_PRINT (0, getregp_image (arg->rp), shift); | |
1874 | break; | |
1875 | ||
1876 | default: | |
1877 | break; | |
1878 | } | |
1879 | } | |
1880 | ||
1881 | /* Retrieve the number of operands for the current assembled instruction. */ | |
1882 | ||
1883 | static int | |
1884 | get_number_of_operands (void) | |
1885 | { | |
1886 | int i; | |
1887 | ||
1888 | for (i = 0; instruction->operands[i].op_type && i < MAX_OPERANDS; i++) | |
1889 | ; | |
1890 | return i; | |
1891 | } | |
1892 | ||
1893 | /* Verify that the number NUM can be represented in BITS bits (that is, | |
1894 | within its permitted range), based on the instruction's FLAGS. | |
1895 | If UPDATE is nonzero, update the value of NUM if necessary. | |
1896 | Return OP_LEGAL upon success, actual error type upon failure. */ | |
1897 | ||
1898 | static op_err | |
1899 | check_range (long *num, int bits, int unsigned flags, int update) | |
1900 | { | |
1901 | long min, max; | |
1902 | int retval = OP_LEGAL; | |
1903 | long value = *num; | |
1904 | ||
1905 | if (bits == 0 && value > 0) return OP_OUT_OF_RANGE; | |
1906 | ||
1907 | /* For hosts witah longs bigger than 32-bits make sure that the top | |
1908 | bits of a 32-bit negative value read in by the parser are set, | |
1909 | so that the correct comparisons are made. */ | |
1910 | if (value & 0x80000000) | |
1911 | value |= (-1L << 31); | |
1912 | ||
1913 | ||
1914 | /* Verify operand value is even. */ | |
1915 | if (flags & OP_EVEN) | |
1916 | { | |
1917 | if (value % 2) | |
1918 | return OP_NOT_EVEN; | |
1919 | } | |
1920 | ||
1921 | if (flags & OP_DEC) | |
1922 | { | |
1923 | value -= 1; | |
1924 | if (update) | |
1925 | *num = value; | |
1926 | } | |
1927 | ||
1928 | if (flags & OP_SHIFT) | |
1929 | { | |
1930 | value >>= 1; | |
1931 | if (update) | |
1932 | *num = value; | |
1933 | } | |
1934 | else if (flags & OP_SHIFT_DEC) | |
1935 | { | |
1936 | value = (value >> 1) - 1; | |
1937 | if (update) | |
1938 | *num = value; | |
1939 | } | |
1940 | ||
1941 | if (flags & OP_ABS20) | |
1942 | { | |
1943 | if (value > 0xEFFFF) | |
1944 | return OP_OUT_OF_RANGE; | |
1945 | } | |
1946 | ||
1947 | if (flags & OP_ESC) | |
1948 | { | |
1949 | if (value == 0xB || value == 0x9) | |
1950 | return OP_OUT_OF_RANGE; | |
1951 | else if (value == -1) | |
1952 | { | |
1953 | if (update) | |
1954 | *num = 9; | |
1955 | return retval; | |
1956 | } | |
1957 | } | |
1958 | ||
1959 | if (flags & OP_ESC1) | |
1960 | { | |
1961 | if (value > 13) | |
1962 | return OP_OUT_OF_RANGE; | |
1963 | } | |
1964 | ||
1965 | if (flags & OP_SIGNED) | |
1966 | { | |
1967 | max = (1 << (bits - 1)) - 1; | |
1968 | min = - (1 << (bits - 1)); | |
1969 | if ((value > max) || (value < min)) | |
1970 | retval = OP_OUT_OF_RANGE; | |
1971 | } | |
1972 | else if (flags & OP_UNSIGNED) | |
1973 | { | |
1974 | max = ((((1 << (bits - 1)) - 1) << 1) | 1); | |
1975 | min = 0; | |
1976 | if (((unsigned long) value > (unsigned long) max) | |
1977 | || ((unsigned long) value < (unsigned long) min)) | |
1978 | retval = OP_OUT_OF_RANGE; | |
1979 | } | |
1980 | else if (flags & OP_NEG) | |
1981 | { | |
1982 | max = - 1; | |
1983 | min = - ((1 << (bits - 1))-1); | |
1984 | if ((value > max) || (value < min)) | |
1985 | retval = OP_OUT_OF_RANGE; | |
1986 | } | |
1987 | return retval; | |
1988 | } | |
1989 | ||
1990 | /* Bunch of error checkings. | |
1991 | The checks are made after a matching instruction was found. */ | |
1992 | ||
1993 | static void | |
1994 | warn_if_needed (ins *insn) | |
1995 | { | |
1996 | /* If the post-increment address mode is used and the load/store | |
1997 | source register is the same as rbase, the result of the | |
1998 | instruction is undefined. */ | |
1999 | if (IS_INSN_TYPE (LD_STOR_INS_INC)) | |
2000 | { | |
2001 | /* Enough to verify that one of the arguments is a simple reg. */ | |
2002 | if ((insn->arg[0].type == arg_r) || (insn->arg[1].type == arg_r)) | |
2003 | if (insn->arg[0].r == insn->arg[1].r) | |
2004 | as_bad (_("Same src/dest register is used (`r%d'), result is undefined"), insn->arg[0].r); | |
2005 | } | |
2006 | ||
2007 | if (IS_INSN_MNEMONIC ("pop") | |
2008 | || IS_INSN_MNEMONIC ("push") | |
2009 | || IS_INSN_MNEMONIC ("popret")) | |
2010 | { | |
2011 | unsigned int count = insn->arg[0].constant, reg_val; | |
2012 | ||
2013 | /* Check if count operand caused to save/retrive the RA twice | |
2014 | to generate warning message. */ | |
2015 | if (insn->nargs > 2) | |
2016 | { | |
2017 | reg_val = getreg_image (insn->arg[1].r); | |
2018 | ||
2019 | if ( ((reg_val == 9) && (count > 7)) | |
2020 | || ((reg_val == 10) && (count > 6)) | |
2021 | || ((reg_val == 11) && (count > 5)) | |
2022 | || ((reg_val == 12) && (count > 4)) | |
2023 | || ((reg_val == 13) && (count > 2)) | |
2024 | || ((reg_val == 14) && (count > 0))) | |
2025 | as_warn (_("RA register is saved twice.")); | |
2026 | ||
2027 | /* Check if the third operand is "RA" or "ra" */ | |
2028 | if (!(((insn->arg[2].r) == ra) || ((insn->arg[2].r) == RA))) | |
2029 | as_bad (_("`%s' Illegal use of registers."), ins_parse); | |
2030 | } | |
2031 | ||
2032 | if (insn->nargs > 1) | |
2033 | { | |
2034 | reg_val = getreg_image (insn->arg[1].r); | |
2035 | ||
2036 | /* If register is a register pair ie r12/r13/r14 in operand1, then | |
2037 | the count constant should be validated. */ | |
2038 | if (((reg_val == 11) && (count > 7)) | |
2039 | || ((reg_val == 12) && (count > 6)) | |
2040 | || ((reg_val == 13) && (count > 4)) | |
2041 | || ((reg_val == 14) && (count > 2)) | |
2042 | || ((reg_val == 15) && (count > 0))) | |
2043 | as_bad (_("`%s' Illegal count-register combination."), ins_parse); | |
2044 | } | |
2045 | else | |
2046 | { | |
2047 | /* Check if the operand is "RA" or "ra" */ | |
2048 | if (!(((insn->arg[0].r) == ra) || ((insn->arg[0].r) == RA))) | |
2049 | as_bad (_("`%s' Illegal use of register."), ins_parse); | |
2050 | } | |
2051 | } | |
2052 | ||
2053 | /* Some instruction assume the stack pointer as rptr operand. | |
2054 | Issue an error when the register to be loaded is also SP. */ | |
2055 | if (instruction->flags & NO_SP) | |
2056 | { | |
2057 | if (getreg_image (insn->arg[1].r) == getreg_image (sp)) | |
2058 | as_bad (_("`%s' has undefined result"), ins_parse); | |
2059 | } | |
2060 | ||
2061 | /* If the rptr register is specified as one of the registers to be loaded, | |
2062 | the final contents of rptr are undefined. Thus, we issue an error. */ | |
2063 | if (instruction->flags & NO_RPTR) | |
2064 | { | |
2065 | if ((1 << getreg_image (insn->arg[0].r)) & insn->arg[1].constant) | |
2066 | as_bad (_("Same src/dest register is used (`r%d'),result is undefined"), | |
2067 | getreg_image (insn->arg[0].r)); | |
2068 | } | |
2069 | } | |
2070 | ||
2071 | /* In some cases, we need to adjust the instruction pointer although a | |
2072 | match was already found. Here, we gather all these cases. | |
2073 | Returns 1 if instruction pointer was adjusted, otherwise 0. */ | |
2074 | ||
2075 | static int | |
2076 | adjust_if_needed (ins *insn ATTRIBUTE_UNUSED) | |
2077 | { | |
2078 | int ret_value = 0; | |
2079 | ||
2080 | if ((IS_INSN_TYPE (CSTBIT_INS)) || (IS_INSN_TYPE (LD_STOR_INS))) | |
2081 | { | |
2082 | if ((instruction->operands[0].op_type == abs24) | |
2083 | && ((insn->arg[0].constant) > 0xF00000)) | |
2084 | { | |
2085 | insn->arg[0].constant &= 0xFFFFF; | |
2086 | instruction--; | |
2087 | ret_value = 1; | |
2088 | } | |
2089 | } | |
2090 | ||
2091 | return ret_value; | |
2092 | } | |
2093 | ||
2094 | /* Assemble a single instruction: | |
2095 | INSN is already parsed (that is, all operand values and types are set). | |
2096 | For instruction to be assembled, we need to find an appropriate template in | |
2097 | the instruction table, meeting the following conditions: | |
2098 | 1: Has the same number of operands. | |
2099 | 2: Has the same operand types. | |
2100 | 3: Each operand size is sufficient to represent the instruction's values. | |
2101 | Returns 1 upon success, 0 upon failure. */ | |
2102 | ||
2103 | static int | |
2104 | assemble_insn (char *mnemonic, ins *insn) | |
2105 | { | |
2106 | /* Type of each operand in the current template. */ | |
2107 | argtype cur_type[MAX_OPERANDS]; | |
2108 | /* Size (in bits) of each operand in the current template. */ | |
2109 | unsigned int cur_size[MAX_OPERANDS]; | |
2110 | /* Flags of each operand in the current template. */ | |
2111 | unsigned int cur_flags[MAX_OPERANDS]; | |
2112 | /* Instruction type to match. */ | |
2113 | unsigned int ins_type; | |
2114 | /* Boolean flag to mark whether a match was found. */ | |
2115 | int match = 0; | |
2116 | int i; | |
2117 | /* Nonzero if an instruction with same number of operands was found. */ | |
2118 | int found_same_number_of_operands = 0; | |
2119 | /* Nonzero if an instruction with same argument types was found. */ | |
2120 | int found_same_argument_types = 0; | |
2121 | /* Nonzero if a constant was found within the required range. */ | |
2122 | int found_const_within_range = 0; | |
2123 | /* Argument number of an operand with invalid type. */ | |
2124 | int invalid_optype = -1; | |
2125 | /* Argument number of an operand with invalid constant value. */ | |
2126 | int invalid_const = -1; | |
2127 | /* Operand error (used for issuing various constant error messages). */ | |
2128 | op_err op_error, const_err = OP_LEGAL; | |
2129 | ||
2130 | /* Retrieve data (based on FUNC) for each operand of a given instruction. */ | |
2131 | #define GET_CURRENT_DATA(FUNC, ARRAY) \ | |
2132 | for (i = 0; i < insn->nargs; i++) \ | |
2133 | ARRAY[i] = FUNC (instruction->operands[i].op_type) | |
2134 | ||
2135 | #define GET_CURRENT_TYPE GET_CURRENT_DATA (get_optype, cur_type) | |
2136 | #define GET_CURRENT_SIZE GET_CURRENT_DATA (get_opbits, cur_size) | |
2137 | #define GET_CURRENT_FLAGS GET_CURRENT_DATA (get_opflags, cur_flags) | |
2138 | ||
2139 | /* Instruction has no operands -> only copy the constant opcode. */ | |
2140 | if (insn->nargs == 0) | |
2141 | { | |
2142 | output_opcode[0] = BIN (instruction->match, instruction->match_bits); | |
2143 | return 1; | |
2144 | } | |
2145 | ||
2146 | /* In some case, same mnemonic can appear with different instruction types. | |
2147 | For example, 'storb' is supported with 3 different types : | |
2148 | LD_STOR_INS, LD_STOR_INS_INC, STOR_IMM_INS. | |
2149 | We assume that when reaching this point, the instruction type was | |
2150 | pre-determined. We need to make sure that the type stays the same | |
2151 | during a search for matching instruction. */ | |
2152 | ins_type = CR16_INS_TYPE (instruction->flags); | |
2153 | ||
2154 | while (/* Check that match is still not found. */ | |
2155 | match != 1 | |
2156 | /* Check we didn't get to end of table. */ | |
2157 | && instruction->mnemonic != NULL | |
2158 | /* Check that the actual mnemonic is still available. */ | |
2159 | && IS_INSN_MNEMONIC (mnemonic) | |
2160 | /* Check that the instruction type wasn't changed. */ | |
2161 | && IS_INSN_TYPE (ins_type)) | |
2162 | { | |
2163 | /* Check whether number of arguments is legal. */ | |
2164 | if (get_number_of_operands () != insn->nargs) | |
2165 | goto next_insn; | |
2166 | found_same_number_of_operands = 1; | |
2167 | ||
2168 | /* Initialize arrays with data of each operand in current template. */ | |
2169 | GET_CURRENT_TYPE; | |
2170 | GET_CURRENT_SIZE; | |
2171 | GET_CURRENT_FLAGS; | |
2172 | ||
2173 | /* Check for type compatibility. */ | |
2174 | for (i = 0; i < insn->nargs; i++) | |
2175 | { | |
2176 | if (cur_type[i] != insn->arg[i].type) | |
2177 | { | |
2178 | if (invalid_optype == -1) | |
2179 | invalid_optype = i + 1; | |
2180 | goto next_insn; | |
2181 | } | |
2182 | } | |
2183 | found_same_argument_types = 1; | |
2184 | ||
2185 | for (i = 0; i < insn->nargs; i++) | |
2186 | { | |
2187 | /* If 'bal' instruction size is '2' and reg operand is not 'ra' | |
2188 | then goto next instruction. */ | |
2189 | if (IS_INSN_MNEMONIC ("bal") && (i == 0) | |
2190 | && (instruction->size == 2) && (insn->arg[i].rp != 14)) | |
2191 | goto next_insn; | |
2192 | ||
2193 | /* If 'storb' instruction with 'sp' reg and 16-bit disp of | |
2194 | * reg-pair, leads to undifined trap, so this should use | |
2195 | * 20-bit disp of reg-pair. */ | |
2196 | if (IS_INSN_MNEMONIC ("storb") && (instruction->size == 2) | |
2197 | && (insn->arg[i].r == 15) && (insn->arg[i + 1].type == arg_crp)) | |
2198 | goto next_insn; | |
2199 | ||
2200 | /* Only check range - don't update the constant's value, since the | |
2201 | current instruction may not be the last we try to match. | |
2202 | The constant's value will be updated later, right before printing | |
2203 | it to the object file. */ | |
2204 | if ((insn->arg[i].X_op == O_constant) | |
2205 | && (op_error = check_range (&insn->arg[i].constant, cur_size[i], | |
2206 | cur_flags[i], 0))) | |
2207 | { | |
2208 | if (invalid_const == -1) | |
2209 | { | |
2210 | invalid_const = i + 1; | |
2211 | const_err = op_error; | |
2212 | } | |
2213 | goto next_insn; | |
2214 | } | |
2215 | /* For symbols, we make sure the relocation size (which was already | |
2216 | determined) is sufficient. */ | |
2217 | else if ((insn->arg[i].X_op == O_symbol) | |
2218 | && ((bfd_reloc_type_lookup (stdoutput, insn->rtype))->bitsize | |
2219 | > cur_size[i])) | |
2220 | goto next_insn; | |
2221 | } | |
2222 | found_const_within_range = 1; | |
2223 | ||
2224 | /* If we got till here -> Full match is found. */ | |
2225 | match = 1; | |
2226 | break; | |
2227 | ||
2228 | /* Try again with next instruction. */ | |
2229 | next_insn: | |
2230 | instruction++; | |
2231 | } | |
2232 | ||
2233 | if (!match) | |
2234 | { | |
2235 | /* We haven't found a match - instruction can't be assembled. */ | |
2236 | if (!found_same_number_of_operands) | |
2237 | as_bad (_("Incorrect number of operands")); | |
2238 | else if (!found_same_argument_types) | |
2239 | as_bad (_("Illegal type of operand (arg %d)"), invalid_optype); | |
2240 | else if (!found_const_within_range) | |
2241 | { | |
2242 | switch (const_err) | |
2243 | { | |
2244 | case OP_OUT_OF_RANGE: | |
2245 | as_bad (_("Operand out of range (arg %d)"), invalid_const); | |
2246 | break; | |
2247 | case OP_NOT_EVEN: | |
2248 | as_bad (_("Operand has odd displacement (arg %d)"), invalid_const); | |
2249 | break; | |
2250 | default: | |
2251 | as_bad (_("Illegal operand (arg %d)"), invalid_const); | |
2252 | break; | |
2253 | } | |
2254 | } | |
2255 | ||
2256 | return 0; | |
2257 | } | |
2258 | else | |
2259 | /* Full match - print the encoding to output file. */ | |
2260 | { | |
2261 | /* Make further checkings (such that couldn't be made earlier). | |
2262 | Warn the user if necessary. */ | |
2263 | warn_if_needed (insn); | |
2264 | ||
2265 | /* Check whether we need to adjust the instruction pointer. */ | |
2266 | if (adjust_if_needed (insn)) | |
2267 | /* If instruction pointer was adjusted, we need to update | |
2268 | the size of the current template operands. */ | |
2269 | GET_CURRENT_SIZE; | |
2270 | ||
2271 | for (i = 0; i < insn->nargs; i++) | |
2272 | { | |
2273 | int j = instruction->flags & REVERSE_MATCH ? | |
2274 | i == 0 ? 1 : | |
2275 | i == 1 ? 0 : i : | |
2276 | i; | |
2277 | ||
2278 | /* This time, update constant value before printing it. */ | |
2279 | if ((insn->arg[j].X_op == O_constant) | |
2280 | && (check_range (&insn->arg[j].constant, cur_size[j], | |
2281 | cur_flags[j], 1) != OP_LEGAL)) | |
2282 | as_fatal (_("Illegal operand (arg %d)"), j+1); | |
2283 | } | |
2284 | ||
2285 | /* First, copy the instruction's opcode. */ | |
2286 | output_opcode[0] = BIN (instruction->match, instruction->match_bits); | |
2287 | ||
2288 | for (i = 0; i < insn->nargs; i++) | |
2289 | { | |
2290 | /* For BAL (ra),disp17 instuction only. And also set the | |
2291 | DISP24a relocation type. */ | |
2292 | if (IS_INSN_MNEMONIC ("bal") && (instruction->size == 2) && i == 0) | |
2293 | { | |
2294 | insn->rtype = BFD_RELOC_CR16_DISP24a; | |
2295 | continue; | |
2296 | } | |
2297 | cur_arg_num = i; | |
2298 | print_operand (cur_size[i], instruction->operands[i].shift, | |
2299 | &insn->arg[i]); | |
2300 | } | |
2301 | } | |
2302 | ||
2303 | return 1; | |
2304 | } | |
2305 | ||
2306 | /* Print the instruction. | |
2307 | Handle also cases where the instruction is relaxable/relocatable. */ | |
2308 | ||
2309 | static void | |
2310 | print_insn (ins *insn) | |
2311 | { | |
2312 | unsigned int i, j, insn_size; | |
2313 | char *this_frag; | |
2314 | unsigned short words[4]; | |
2315 | int addr_mod; | |
2316 | ||
2317 | /* Arrange the insn encodings in a WORD size array. */ | |
2318 | for (i = 0, j = 0; i < 2; i++) | |
2319 | { | |
2320 | words[j++] = (output_opcode[i] >> 16) & 0xFFFF; | |
2321 | words[j++] = output_opcode[i] & 0xFFFF; | |
2322 | } | |
2323 | ||
2324 | insn_size = instruction->size; | |
2325 | this_frag = frag_more (insn_size * 2); | |
2326 | ||
2327 | /* Handle relocation. */ | |
2328 | if ((relocatable) && (insn->rtype != BFD_RELOC_NONE)) | |
2329 | { | |
2330 | reloc_howto_type *reloc_howto; | |
2331 | int size; | |
2332 | ||
2333 | reloc_howto = bfd_reloc_type_lookup (stdoutput, insn->rtype); | |
2334 | ||
2335 | if (!reloc_howto) | |
2336 | abort (); | |
2337 | ||
2338 | size = bfd_get_reloc_size (reloc_howto); | |
2339 | ||
2340 | if (size < 1 || size > 4) | |
2341 | abort (); | |
2342 | ||
2343 | fix_new_exp (frag_now, this_frag - frag_now->fr_literal, | |
2344 | size, &insn->exp, reloc_howto->pc_relative, | |
2345 | insn->rtype); | |
2346 | } | |
2347 | ||
2348 | /* Verify a 2-byte code alignment. */ | |
2349 | addr_mod = frag_now_fix () & 1; | |
2350 | if (frag_now->has_code && frag_now->insn_addr != addr_mod) | |
2351 | as_bad (_("instruction address is not a multiple of 2")); | |
2352 | frag_now->insn_addr = addr_mod; | |
2353 | frag_now->has_code = 1; | |
2354 | ||
2355 | /* Write the instruction encoding to frag. */ | |
2356 | for (i = 0; i < insn_size; i++) | |
2357 | { | |
2358 | md_number_to_chars (this_frag, (valueT) words[i], 2); | |
2359 | this_frag += 2; | |
2360 | } | |
2361 | } | |
2362 | ||
2363 | /* This is the guts of the machine-dependent assembler. OP points to a | |
2364 | machine dependent instruction. This function is supposed to emit | |
2365 | the frags/bytes it assembles to. */ | |
2366 | ||
2367 | void | |
2368 | md_assemble (char *op) | |
2369 | { | |
2370 | ins cr16_ins; | |
2371 | char *param, param1[32]; | |
2372 | char c; | |
2373 | ||
2374 | /* Reset global variables for a new instruction. */ | |
2375 | reset_vars (op); | |
2376 | ||
2377 | /* Strip the mnemonic. */ | |
2378 | for (param = op; *param != 0 && !ISSPACE (*param); param++) | |
2379 | ; | |
2380 | c = *param; | |
2381 | *param++ = '\0'; | |
2382 | ||
2383 | /* bCC instuctions and adjust the mnemonic by adding extra white spaces. */ | |
2384 | if (is_bcc_insn (op)) | |
2385 | { | |
2386 | strcpy (param1, get_b_cc (op)); | |
2387 | op = "b"; | |
2388 | strcat (param1,","); | |
2389 | strcat (param1, param); | |
2390 | param = (char *) ¶m1; | |
2391 | } | |
2392 | ||
2393 | /* Checking the cinv options and adjust the mnemonic by removing the | |
2394 | extra white spaces. */ | |
2395 | if (streq ("cinv", op)) | |
2396 | { | |
2397 | /* Validate the cinv options. */ | |
2398 | check_cinv_options (param); | |
2399 | strcat (op, param); | |
2400 | } | |
2401 | ||
2402 | /* MAPPING - SHIFT INSN, if imm4/imm16 positive values | |
2403 | lsh[b/w] imm4/imm6, reg ==> ashu[b/w] imm4/imm16, reg | |
2404 | as CR16 core doesn't support lsh[b/w] right shift operaions. */ | |
2405 | if ((streq ("lshb", op) || streq ("lshw", op) || streq ("lshd", op)) | |
2406 | && (param [0] == '$')) | |
2407 | { | |
2408 | strcpy (param1, param); | |
2409 | /* Find the instruction. */ | |
2410 | instruction = (const inst *) hash_find (cr16_inst_hash, op); | |
2411 | parse_operands (&cr16_ins, param1); | |
2412 | if (((&cr16_ins)->arg[0].type == arg_ic) | |
2413 | && ((&cr16_ins)->arg[0].constant >= 0)) | |
2414 | { | |
2415 | if (streq ("lshb", op)) | |
2416 | op = "ashub"; | |
2417 | else if (streq ("lshd", op)) | |
2418 | op = "ashud"; | |
2419 | else | |
2420 | op = "ashuw"; | |
2421 | } | |
2422 | } | |
2423 | ||
2424 | /* Find the instruction. */ | |
2425 | instruction = (const inst *) hash_find (cr16_inst_hash, op); | |
2426 | if (instruction == NULL) | |
2427 | { | |
2428 | as_bad (_("Unknown opcode: `%s'"), op); | |
2429 | return; | |
2430 | } | |
2431 | ||
2432 | /* Tie dwarf2 debug info to the address at the start of the insn. */ | |
2433 | dwarf2_emit_insn (0); | |
2434 | ||
2435 | /* Parse the instruction's operands. */ | |
2436 | parse_insn (&cr16_ins, param); | |
2437 | ||
2438 | /* Assemble the instruction - return upon failure. */ | |
2439 | if (assemble_insn (op, &cr16_ins) == 0) | |
2440 | return; | |
2441 | ||
2442 | /* Print the instruction. */ | |
2443 | print_insn (&cr16_ins); | |
2444 | } |