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1 | /* tc-tilepro.c -- Assemble for a TILEPro chip. |
2 | Copyright 2011 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
19 | MA 02110-1301, USA. */ | |
20 | ||
21 | #include "as.h" | |
22 | #include "struc-symbol.h" | |
23 | #include "subsegs.h" | |
24 | ||
25 | #include "elf/tilepro.h" | |
26 | #include "opcode/tilepro.h" | |
27 | ||
28 | #include "dwarf2dbg.h" | |
29 | #include "dw2gencfi.h" | |
30 | ||
31 | #include "safe-ctype.h" | |
32 | ||
33 | ||
34 | /* Special registers. */ | |
35 | #define TREG_IDN0 57 | |
36 | #define TREG_IDN1 58 | |
37 | #define TREG_UDN0 59 | |
38 | #define TREG_UDN1 60 | |
39 | #define TREG_UDN2 61 | |
40 | #define TREG_UDN3 62 | |
41 | #define TREG_ZERO 63 | |
42 | ||
43 | ||
44 | /* Generic assembler global variables which must be defined by all | |
45 | targets. */ | |
46 | ||
47 | /* Characters which always start a comment. */ | |
48 | const char comment_chars[] = "#"; | |
49 | ||
50 | /* Characters which start a comment at the beginning of a line. */ | |
51 | const char line_comment_chars[] = "#"; | |
52 | ||
53 | /* Characters which may be used to separate multiple commands on a | |
54 | single line. */ | |
55 | const char line_separator_chars[] = ";"; | |
56 | ||
57 | /* Characters which are used to indicate an exponent in a floating | |
58 | point number. */ | |
59 | const char EXP_CHARS[] = "eE"; | |
60 | ||
61 | /* Characters which mean that a number is a floating point constant, | |
62 | as in 0d1.0. */ | |
63 | const char FLT_CHARS[] = "rRsSfFdDxXpP"; | |
64 | ||
65 | const char *md_shortopts = "VQ:"; | |
66 | ||
67 | struct option md_longopts[] = | |
68 | { | |
69 | {NULL, no_argument, NULL, 0} | |
70 | }; | |
71 | ||
72 | size_t md_longopts_size = sizeof (md_longopts); | |
73 | ||
74 | int | |
75 | md_parse_option (int c, char *arg ATTRIBUTE_UNUSED) | |
76 | { | |
77 | switch (c) | |
78 | { | |
79 | /* -Qy, -Qn: SVR4 arguments controlling whether a .comment section | |
80 | should be emitted or not. FIXME: Not implemented. */ | |
81 | case 'Q': | |
82 | break; | |
83 | ||
84 | /* -V: SVR4 argument to print version ID. */ | |
85 | case 'V': | |
86 | print_version_id (); | |
87 | break; | |
88 | ||
89 | default: | |
90 | return 0; | |
91 | } | |
92 | ||
93 | return 1; | |
94 | } | |
95 | ||
96 | void | |
97 | md_show_usage (FILE *stream) | |
98 | { | |
99 | fprintf (stream, _("\ | |
100 | -Q ignored\n\ | |
101 | -V print assembler version number\n")); | |
102 | } | |
103 | ||
104 | /* Extra expression types. */ | |
105 | ||
106 | #define O_lo16 O_md1 | |
107 | #define O_hi16 O_md2 | |
108 | #define O_ha16 O_md3 | |
109 | #define O_got O_md4 | |
110 | #define O_got_lo16 O_md5 | |
111 | #define O_got_hi16 O_md6 | |
112 | #define O_got_ha16 O_md7 | |
113 | #define O_plt O_md8 | |
114 | #define O_tls_gd O_md9 | |
115 | #define O_tls_gd_lo16 O_md10 | |
116 | #define O_tls_gd_hi16 O_md11 | |
117 | #define O_tls_gd_ha16 O_md12 | |
118 | #define O_tls_ie O_md13 | |
119 | #define O_tls_ie_lo16 O_md14 | |
120 | #define O_tls_ie_hi16 O_md15 | |
121 | #define O_tls_ie_ha16 O_md16 | |
122 | ||
123 | static struct hash_control *special_operator_hash; | |
124 | ||
125 | /* Hash tables for instruction mnemonic lookup. */ | |
126 | static struct hash_control *op_hash; | |
127 | ||
128 | /* Hash table for spr lookup. */ | |
129 | static struct hash_control *spr_hash; | |
130 | ||
131 | /* True temporarily while parsing an SPR expression. This changes the | |
132 | * namespace to include SPR names. */ | |
133 | static int parsing_spr; | |
134 | ||
135 | /* Are we currently inside `{ ... }'? */ | |
136 | static int inside_bundle; | |
137 | ||
138 | struct tilepro_instruction | |
139 | { | |
140 | const struct tilepro_opcode *opcode; | |
141 | tilepro_pipeline pipe; | |
142 | expressionS operand_values[TILEPRO_MAX_OPERANDS]; | |
143 | }; | |
144 | ||
145 | /* This keeps track of the current bundle being built up. */ | |
146 | static struct tilepro_instruction | |
147 | current_bundle[TILEPRO_MAX_INSTRUCTIONS_PER_BUNDLE]; | |
148 | ||
149 | /* Index in current_bundle for the next instruction to parse. */ | |
150 | static int current_bundle_index; | |
151 | ||
152 | /* Allow 'r63' in addition to 'zero', etc. Normally we disallow this as | |
153 | 'zero' is not a real register, so using it accidentally would be a | |
154 | nasty bug. For other registers, such as 'sp', code using multiple names | |
155 | for the same physical register is excessively confusing. | |
156 | ||
157 | The '.require_canonical_reg_names' pseudo-op turns this error on, | |
158 | and the '.no_require_canonical_reg_names' pseudo-op turns this off. | |
159 | By default the error is on. */ | |
160 | static int require_canonical_reg_names; | |
161 | ||
162 | /* Allow bundles that do undefined or suspicious things like write | |
163 | two different values to the same register at the same time. | |
164 | ||
165 | The '.no_allow_suspicious_bundles' pseudo-op turns this error on, | |
166 | and the '.allow_suspicious_bundles' pseudo-op turns this off. */ | |
167 | static int allow_suspicious_bundles; | |
168 | ||
169 | ||
170 | /* A hash table of main processor registers, mapping each register name | |
171 | to its index. | |
172 | ||
173 | Furthermore, if the register number is greater than the number | |
174 | of registers for that processor, the user used an illegal alias | |
175 | for that register (e.g. r63 instead of zero), so we should generate | |
176 | a warning. The attempted register number can be found by clearing | |
177 | NONCANONICAL_REG_NAME_FLAG. */ | |
178 | static struct hash_control *main_reg_hash; | |
179 | ||
180 | ||
181 | /* We cannot unambiguously store a 0 in a hash table and look it up, | |
182 | so we OR in this flag to every canonical register. */ | |
183 | #define CANONICAL_REG_NAME_FLAG 0x1000 | |
184 | ||
185 | /* By default we disallow register aliases like r63, but we record | |
186 | them in the hash table in case the .no_require_canonical_reg_names | |
187 | directive is used. Noncanonical names have this value added to them. */ | |
188 | #define NONCANONICAL_REG_NAME_FLAG 0x2000 | |
189 | ||
190 | /* Discards flags for register hash table entries and returns the | |
191 | reg number. */ | |
192 | #define EXTRACT_REGNO(p) ((p) & 63) | |
193 | ||
194 | /* This function is called once, at assembler startup time. It should | |
195 | set up all the tables, etc., that the MD part of the assembler will | |
196 | need. */ | |
197 | void | |
198 | md_begin (void) | |
199 | { | |
200 | const struct tilepro_opcode *op; | |
201 | int i; | |
202 | ||
203 | /* Guarantee text section is aligned. */ | |
204 | bfd_set_section_alignment (stdoutput, text_section, | |
205 | TILEPRO_LOG2_BUNDLE_ALIGNMENT_IN_BYTES); | |
206 | ||
207 | require_canonical_reg_names = 1; | |
208 | allow_suspicious_bundles = 0; | |
209 | current_bundle_index = 0; | |
210 | inside_bundle = 0; | |
211 | ||
212 | /* Initialize special operator hash table. */ | |
213 | special_operator_hash = hash_new (); | |
214 | #define INSERT_SPECIAL_OP(name) \ | |
215 | hash_insert (special_operator_hash, #name, (void *)O_##name) | |
216 | ||
217 | INSERT_SPECIAL_OP(lo16); | |
218 | INSERT_SPECIAL_OP(hi16); | |
219 | INSERT_SPECIAL_OP(ha16); | |
220 | INSERT_SPECIAL_OP(got); | |
221 | INSERT_SPECIAL_OP(got_lo16); | |
222 | INSERT_SPECIAL_OP(got_hi16); | |
223 | INSERT_SPECIAL_OP(got_ha16); | |
224 | INSERT_SPECIAL_OP(plt); | |
225 | INSERT_SPECIAL_OP(tls_gd); | |
226 | INSERT_SPECIAL_OP(tls_gd_lo16); | |
227 | INSERT_SPECIAL_OP(tls_gd_hi16); | |
228 | INSERT_SPECIAL_OP(tls_gd_ha16); | |
229 | INSERT_SPECIAL_OP(tls_ie); | |
230 | INSERT_SPECIAL_OP(tls_ie_lo16); | |
231 | INSERT_SPECIAL_OP(tls_ie_hi16); | |
232 | INSERT_SPECIAL_OP(tls_ie_ha16); | |
233 | #undef INSERT_SPECIAL_OP | |
234 | ||
235 | /* Initialize op_hash hash table. */ | |
236 | op_hash = hash_new (); | |
237 | for (op = &tilepro_opcodes[0]; op->name != NULL; op++) | |
238 | { | |
239 | const char *hash_err = hash_insert (op_hash, op->name, (void *)op); | |
240 | if (hash_err != NULL) | |
241 | { | |
242 | as_fatal (_("Internal Error: Can't hash %s: %s"), | |
243 | op->name, hash_err); | |
244 | } | |
245 | } | |
246 | ||
247 | /* Initialize the spr hash table. */ | |
248 | parsing_spr = 0; | |
249 | spr_hash = hash_new (); | |
250 | for (i = 0; i < tilepro_num_sprs; i++) | |
251 | hash_insert (spr_hash, tilepro_sprs[i].name, | |
252 | (void *) &tilepro_sprs[i]); | |
253 | ||
254 | /* Set up the main_reg_hash table. We use this instead of | |
255 | * creating a symbol in the register section to avoid ambiguities | |
256 | * with labels that have the same names as registers. */ | |
257 | main_reg_hash = hash_new (); | |
258 | for (i = 0; i < TILEPRO_NUM_REGISTERS; i++) | |
259 | { | |
260 | char buf[64]; | |
261 | ||
262 | hash_insert (main_reg_hash, tilepro_register_names[i], | |
263 | (void *) (long)(i | CANONICAL_REG_NAME_FLAG)); | |
264 | ||
265 | /* See if we should insert a noncanonical alias, like r63. */ | |
266 | sprintf (buf, "r%d", i); | |
267 | if (strcmp (buf, tilepro_register_names[i]) != 0) | |
268 | hash_insert (main_reg_hash, xstrdup (buf), | |
269 | (void *) (long)(i | NONCANONICAL_REG_NAME_FLAG)); | |
270 | } | |
271 | ||
272 | /* Insert obsolete backwards-compatibility register names. */ | |
273 | hash_insert (main_reg_hash, "io0", | |
274 | (void *) (long) (TREG_IDN0 | CANONICAL_REG_NAME_FLAG)); | |
275 | hash_insert (main_reg_hash, "io1", | |
276 | (void *) (long) (TREG_IDN1 | CANONICAL_REG_NAME_FLAG)); | |
277 | hash_insert (main_reg_hash, "us0", | |
278 | (void *) (long) (TREG_UDN0 | CANONICAL_REG_NAME_FLAG)); | |
279 | hash_insert (main_reg_hash, "us1", | |
280 | (void *) (long) (TREG_UDN1 | CANONICAL_REG_NAME_FLAG)); | |
281 | hash_insert (main_reg_hash, "us2", | |
282 | (void *) (long) (TREG_UDN2 | CANONICAL_REG_NAME_FLAG)); | |
283 | hash_insert (main_reg_hash, "us3", | |
284 | (void *) (long) (TREG_UDN3 | CANONICAL_REG_NAME_FLAG)); | |
285 | ||
286 | } | |
287 | ||
288 | ||
289 | #define BUNDLE_TEMPLATE_MASK(p0, p1, p2) \ | |
290 | ((p0) | ((p1) << 8) | ((p2) << 16)) | |
291 | #define BUNDLE_TEMPLATE(p0, p1, p2) \ | |
292 | { { (p0), (p1), (p2) }, \ | |
293 | BUNDLE_TEMPLATE_MASK(1 << (p0), 1 << (p1), (1 << (p2))) \ | |
294 | } | |
295 | ||
296 | #define NO_PIPELINE TILEPRO_NUM_PIPELINE_ENCODINGS | |
297 | ||
298 | struct bundle_template | |
299 | { | |
300 | tilepro_pipeline pipe[TILEPRO_MAX_INSTRUCTIONS_PER_BUNDLE]; | |
301 | unsigned int pipe_mask; | |
302 | }; | |
303 | ||
304 | static const struct bundle_template bundle_templates[] = | |
305 | { | |
306 | /* In Y format we must always have something in Y2, since it has | |
307 | * no fnop, so this conveys that Y2 must always be used. */ | |
308 | BUNDLE_TEMPLATE(TILEPRO_PIPELINE_Y0, TILEPRO_PIPELINE_Y2, NO_PIPELINE), | |
309 | BUNDLE_TEMPLATE(TILEPRO_PIPELINE_Y1, TILEPRO_PIPELINE_Y2, NO_PIPELINE), | |
310 | BUNDLE_TEMPLATE(TILEPRO_PIPELINE_Y2, TILEPRO_PIPELINE_Y0, NO_PIPELINE), | |
311 | BUNDLE_TEMPLATE(TILEPRO_PIPELINE_Y2, TILEPRO_PIPELINE_Y1, NO_PIPELINE), | |
312 | ||
313 | /* Y format has three instructions. */ | |
314 | BUNDLE_TEMPLATE(TILEPRO_PIPELINE_Y0, TILEPRO_PIPELINE_Y1, TILEPRO_PIPELINE_Y2), | |
315 | BUNDLE_TEMPLATE(TILEPRO_PIPELINE_Y0, TILEPRO_PIPELINE_Y2, TILEPRO_PIPELINE_Y1), | |
316 | BUNDLE_TEMPLATE(TILEPRO_PIPELINE_Y1, TILEPRO_PIPELINE_Y0, TILEPRO_PIPELINE_Y2), | |
317 | BUNDLE_TEMPLATE(TILEPRO_PIPELINE_Y1, TILEPRO_PIPELINE_Y2, TILEPRO_PIPELINE_Y0), | |
318 | BUNDLE_TEMPLATE(TILEPRO_PIPELINE_Y2, TILEPRO_PIPELINE_Y0, TILEPRO_PIPELINE_Y1), | |
319 | BUNDLE_TEMPLATE(TILEPRO_PIPELINE_Y2, TILEPRO_PIPELINE_Y1, TILEPRO_PIPELINE_Y0), | |
320 | ||
321 | /* X format has only two instructions. */ | |
322 | BUNDLE_TEMPLATE(TILEPRO_PIPELINE_X0, TILEPRO_PIPELINE_X1, NO_PIPELINE), | |
323 | BUNDLE_TEMPLATE(TILEPRO_PIPELINE_X1, TILEPRO_PIPELINE_X0, NO_PIPELINE) | |
324 | }; | |
325 | ||
326 | ||
327 | static void | |
328 | prepend_nop_to_bundle (tilepro_mnemonic mnemonic) | |
329 | { | |
330 | memmove (¤t_bundle[1], ¤t_bundle[0], | |
331 | current_bundle_index * sizeof current_bundle[0]); | |
332 | current_bundle[0].opcode = &tilepro_opcodes[mnemonic]; | |
333 | ++current_bundle_index; | |
334 | } | |
335 | ||
336 | ||
337 | static tilepro_bundle_bits | |
338 | insert_operand (tilepro_bundle_bits bits, | |
339 | const struct tilepro_operand *operand, | |
340 | int operand_value, | |
341 | char *file, | |
342 | unsigned lineno) | |
343 | { | |
344 | /* Range-check the immediate. */ | |
345 | int num_bits = operand->num_bits; | |
346 | ||
347 | operand_value >>= operand->rightshift; | |
348 | ||
349 | if (bfd_check_overflow (operand->is_signed | |
350 | ? complain_overflow_signed | |
351 | : complain_overflow_unsigned, | |
352 | num_bits, | |
353 | 0, | |
354 | bfd_arch_bits_per_address (stdoutput), | |
355 | operand_value) | |
356 | != bfd_reloc_ok) | |
357 | { | |
358 | offsetT min, max; | |
359 | if (operand->is_signed) | |
360 | { | |
361 | min = -(1 << (num_bits - 1)); | |
362 | max = (1 << (num_bits - 1)) - 1; | |
363 | } | |
364 | else | |
365 | { | |
366 | min = 0; | |
367 | max = (1 << num_bits) - 1; | |
368 | } | |
369 | as_bad_value_out_of_range (_("operand"), operand_value, min, max, | |
370 | file, lineno); | |
371 | } | |
372 | ||
373 | /* Write out the bits for the immediate. */ | |
374 | return bits | operand->insert (operand_value); | |
375 | } | |
376 | ||
377 | ||
378 | static int | |
379 | apply_special_operator (operatorT op, int num) | |
380 | { | |
381 | switch (op) | |
382 | { | |
383 | case O_lo16: | |
384 | case O_got: | |
385 | case O_got_lo16: | |
386 | case O_tls_gd: | |
387 | case O_tls_gd_lo16: | |
388 | case O_tls_ie: | |
389 | case O_tls_ie_lo16: | |
390 | return (signed short)num; | |
391 | ||
392 | case O_hi16: | |
393 | case O_got_hi16: | |
394 | case O_tls_gd_hi16: | |
395 | case O_tls_ie_hi16: | |
396 | return (signed short)(num >> 16); | |
397 | ||
398 | case O_ha16: | |
399 | case O_got_ha16: | |
400 | case O_tls_gd_ha16: | |
401 | case O_tls_ie_ha16: | |
402 | return (signed short)((num + 0x8000) >> 16); | |
403 | ||
404 | default: | |
405 | abort (); | |
406 | } | |
407 | } | |
408 | ||
409 | ||
410 | static tilepro_bundle_bits | |
411 | emit_tilepro_instruction (tilepro_bundle_bits bits, | |
412 | int num_operands, | |
413 | const unsigned char *operands, | |
414 | expressionS *operand_values, | |
415 | char *bundle_start) | |
416 | { | |
417 | int i; | |
418 | ||
419 | for (i = 0; i < num_operands; i++) | |
420 | { | |
421 | const struct tilepro_operand *operand = | |
422 | &tilepro_operands[operands[i]]; | |
423 | expressionS *operand_exp = &operand_values[i]; | |
424 | int is_pc_relative = operand->is_pc_relative; | |
425 | ||
426 | if (operand_exp->X_op == O_register | |
427 | || (operand_exp->X_op == O_constant && !is_pc_relative)) | |
428 | { | |
429 | /* We know what the bits are right now, so insert them. */ | |
430 | bits = insert_operand (bits, operand, operand_exp->X_add_number, | |
431 | NULL, 0); | |
432 | } | |
433 | else | |
434 | { | |
435 | bfd_reloc_code_real_type reloc = operand->default_reloc; | |
436 | expressionS subexp; | |
437 | int die = 0, use_subexp = 0, require_symbol = 0; | |
438 | fixS *fixP; | |
439 | ||
440 | /* Take an expression like hi16(x) and turn it into x with | |
441 | a different reloc type. */ | |
442 | switch (operand_exp->X_op) | |
443 | { | |
444 | #define HANDLE_OP16(suffix) \ | |
445 | switch (reloc) \ | |
446 | { \ | |
447 | case BFD_RELOC_TILEPRO_IMM16_X0: \ | |
448 | reloc = BFD_RELOC_TILEPRO_IMM16_X0_##suffix; \ | |
449 | break; \ | |
450 | case BFD_RELOC_TILEPRO_IMM16_X1: \ | |
451 | reloc = BFD_RELOC_TILEPRO_IMM16_X1_##suffix; \ | |
452 | break; \ | |
453 | default: \ | |
454 | die = 1; \ | |
455 | break; \ | |
456 | } \ | |
457 | use_subexp = 1 | |
458 | ||
459 | case O_lo16: | |
460 | HANDLE_OP16 (LO); | |
461 | break; | |
462 | ||
463 | case O_hi16: | |
464 | HANDLE_OP16 (HI); | |
465 | break; | |
466 | ||
467 | case O_ha16: | |
468 | HANDLE_OP16 (HA); | |
469 | break; | |
470 | ||
471 | case O_got: | |
472 | HANDLE_OP16 (GOT); | |
473 | require_symbol = 1; | |
474 | break; | |
475 | ||
476 | case O_got_lo16: | |
477 | HANDLE_OP16 (GOT_LO); | |
478 | require_symbol = 1; | |
479 | break; | |
480 | ||
481 | case O_got_hi16: | |
482 | HANDLE_OP16 (GOT_HI); | |
483 | require_symbol = 1; | |
484 | break; | |
485 | ||
486 | case O_got_ha16: | |
487 | HANDLE_OP16 (GOT_HA); | |
488 | require_symbol = 1; | |
489 | break; | |
490 | ||
491 | case O_tls_gd: | |
492 | HANDLE_OP16 (TLS_GD); | |
493 | require_symbol = 1; | |
494 | break; | |
495 | ||
496 | case O_tls_gd_lo16: | |
497 | HANDLE_OP16 (TLS_GD_LO); | |
498 | require_symbol = 1; | |
499 | break; | |
500 | ||
501 | case O_tls_gd_hi16: | |
502 | HANDLE_OP16 (TLS_GD_HI); | |
503 | require_symbol = 1; | |
504 | break; | |
505 | ||
506 | case O_tls_gd_ha16: | |
507 | HANDLE_OP16 (TLS_GD_HA); | |
508 | require_symbol = 1; | |
509 | break; | |
510 | ||
511 | case O_tls_ie: | |
512 | HANDLE_OP16 (TLS_IE); | |
513 | require_symbol = 1; | |
514 | break; | |
515 | ||
516 | case O_tls_ie_lo16: | |
517 | HANDLE_OP16 (TLS_IE_LO); | |
518 | require_symbol = 1; | |
519 | break; | |
520 | ||
521 | case O_tls_ie_hi16: | |
522 | HANDLE_OP16 (TLS_IE_HI); | |
523 | require_symbol = 1; | |
524 | break; | |
525 | ||
526 | case O_tls_ie_ha16: | |
527 | HANDLE_OP16 (TLS_IE_HA); | |
528 | require_symbol = 1; | |
529 | break; | |
530 | ||
531 | #undef HANDLE_OP16 | |
532 | ||
533 | case O_plt: | |
534 | switch (reloc) | |
535 | { | |
536 | case BFD_RELOC_TILEPRO_JOFFLONG_X1: | |
537 | reloc = BFD_RELOC_TILEPRO_JOFFLONG_X1_PLT; | |
538 | break; | |
539 | default: | |
540 | die = 1; | |
541 | break; | |
542 | } | |
543 | use_subexp = 1; | |
544 | require_symbol = 1; | |
545 | break; | |
546 | ||
547 | default: | |
548 | /* Do nothing. */ | |
549 | break; | |
550 | } | |
551 | ||
552 | if (die) | |
553 | { | |
554 | as_bad (_("Invalid operator for operand.")); | |
555 | } | |
556 | else if (use_subexp) | |
557 | { | |
558 | /* Now that we've changed the reloc, change ha16(x) into x, | |
559 | etc. */ | |
560 | ||
561 | if (operand_exp->X_add_symbol->sy_value.X_md) | |
562 | { | |
563 | if (require_symbol) | |
564 | { | |
565 | as_bad (_("Operator may only be applied to symbols.")); | |
566 | } | |
567 | ||
568 | /* HACK: We used X_md to mark this symbol as a fake wrapper | |
569 | around a real expression. To unwrap it, we just grab its | |
570 | value here. */ | |
571 | operand_exp = &operand_exp->X_add_symbol->sy_value; | |
572 | } | |
573 | else | |
574 | { | |
575 | /* The value of this expression is an actual symbol, so | |
576 | turn that into an expression. */ | |
577 | memset (&subexp, 0, sizeof subexp); | |
578 | subexp.X_op = O_symbol; | |
579 | subexp.X_add_symbol = operand_exp->X_add_symbol; | |
580 | operand_exp = &subexp; | |
581 | } | |
582 | } | |
583 | ||
584 | /* Create a fixup to handle this later. */ | |
585 | fixP = fix_new_exp (frag_now, | |
586 | bundle_start - frag_now->fr_literal, | |
587 | (operand->num_bits + 7) >> 3, | |
588 | operand_exp, | |
589 | is_pc_relative, | |
590 | reloc); | |
591 | fixP->tc_fix_data = operand; | |
592 | ||
593 | /* Don't do overflow checking if we are applying a function like | |
594 | ha16. */ | |
595 | fixP->fx_no_overflow |= use_subexp; | |
596 | } | |
597 | } | |
598 | return bits; | |
599 | } | |
600 | ||
601 | ||
602 | /* Detects and complains if two instructions in current_bundle write | |
603 | to the same register, either implicitly or explicitly, or if a | |
604 | read-only register is written. */ | |
605 | static void | |
606 | check_illegal_reg_writes (void) | |
607 | { | |
608 | BFD_HOST_U_64_BIT all_regs_written = 0; | |
609 | int j; | |
610 | ||
611 | for (j = 0; j < current_bundle_index; j++) | |
612 | { | |
613 | const struct tilepro_instruction *instr = ¤t_bundle[j]; | |
614 | int k; | |
615 | BFD_HOST_U_64_BIT regs = | |
616 | ((BFD_HOST_U_64_BIT)1) << instr->opcode->implicitly_written_register; | |
617 | BFD_HOST_U_64_BIT conflict; | |
618 | ||
619 | for (k = 0; k < instr->opcode->num_operands; k++) | |
620 | { | |
621 | const struct tilepro_operand *operand = | |
622 | &tilepro_operands[instr->opcode->operands[instr->pipe][k]]; | |
623 | ||
624 | if (operand->is_dest_reg) | |
625 | { | |
626 | int regno = instr->operand_values[k].X_add_number; | |
627 | BFD_HOST_U_64_BIT mask = ((BFD_HOST_U_64_BIT)1) << regno; | |
628 | ||
629 | if ((mask & ( (((BFD_HOST_U_64_BIT)1) << TREG_IDN1) | |
630 | | (((BFD_HOST_U_64_BIT)1) << TREG_UDN1) | |
631 | | (((BFD_HOST_U_64_BIT)1) << TREG_UDN2) | |
632 | | (((BFD_HOST_U_64_BIT)1) << TREG_UDN3))) != 0 | |
633 | && !allow_suspicious_bundles) | |
634 | { | |
635 | as_bad (_("Writes to register '%s' are not allowed."), | |
636 | tilepro_register_names[regno]); | |
637 | } | |
638 | ||
639 | regs |= mask; | |
640 | } | |
641 | } | |
642 | ||
643 | /* Writing to the zero register doesn't count. */ | |
644 | regs &= ~(((BFD_HOST_U_64_BIT)1) << TREG_ZERO); | |
645 | ||
646 | conflict = all_regs_written & regs; | |
647 | if (conflict != 0 && !allow_suspicious_bundles) | |
648 | { | |
649 | /* Find which register caused the conflict. */ | |
650 | const char *conflicting_reg_name = "???"; | |
651 | int i; | |
652 | ||
653 | for (i = 0; i < TILEPRO_NUM_REGISTERS; i++) | |
654 | { | |
655 | if (((conflict >> i) & 1) != 0) | |
656 | { | |
657 | conflicting_reg_name = tilepro_register_names[i]; | |
658 | break; | |
659 | } | |
660 | } | |
661 | ||
662 | as_bad (_("Two instructions in the same bundle both write " | |
663 | "to register %s, which is not allowed."), | |
664 | conflicting_reg_name); | |
665 | } | |
666 | ||
667 | all_regs_written |= regs; | |
668 | } | |
669 | } | |
670 | ||
671 | ||
672 | static void | |
673 | tilepro_flush_bundle (void) | |
674 | { | |
675 | unsigned i; | |
676 | int j, addr_mod; | |
677 | unsigned compatible_pipes; | |
678 | const struct bundle_template *match; | |
679 | char *f; | |
680 | ||
681 | inside_bundle = 0; | |
682 | ||
683 | switch (current_bundle_index) | |
684 | { | |
685 | case 0: | |
686 | /* No instructions. */ | |
687 | return; | |
688 | case 1: | |
689 | if (current_bundle[0].opcode->can_bundle) | |
690 | { | |
691 | /* Simplify later logic by adding an explicit fnop. */ | |
692 | prepend_nop_to_bundle (TILEPRO_OPC_FNOP); | |
693 | } | |
694 | else | |
695 | { | |
696 | /* This instruction cannot be bundled with anything else. | |
697 | Prepend an explicit 'nop', rather than an 'fnop', because | |
698 | fnops can be replaced by later binary-processing tools | |
699 | while nops cannot. */ | |
700 | prepend_nop_to_bundle (TILEPRO_OPC_NOP); | |
701 | } | |
702 | break; | |
703 | default: | |
704 | if (!allow_suspicious_bundles) | |
705 | { | |
706 | /* Make sure all instructions can be bundled with other | |
707 | instructions. */ | |
708 | const struct tilepro_opcode *cannot_bundle = NULL; | |
709 | bfd_boolean seen_non_nop = FALSE; | |
710 | ||
711 | for (j = 0; j < current_bundle_index; j++) | |
712 | { | |
713 | const struct tilepro_opcode *op = current_bundle[j].opcode; | |
714 | ||
715 | if (!op->can_bundle && cannot_bundle == NULL) | |
716 | cannot_bundle = op; | |
717 | else if (op->mnemonic != TILEPRO_OPC_NOP | |
718 | && op->mnemonic != TILEPRO_OPC_INFO | |
719 | && op->mnemonic != TILEPRO_OPC_INFOL) | |
720 | seen_non_nop = TRUE; | |
721 | } | |
722 | ||
723 | if (cannot_bundle != NULL && seen_non_nop) | |
724 | { | |
725 | current_bundle_index = 0; | |
726 | as_bad (_("'%s' may not be bundled with other instructions."), | |
727 | cannot_bundle->name); | |
728 | return; | |
729 | } | |
730 | } | |
731 | break; | |
732 | } | |
733 | ||
734 | compatible_pipes = | |
735 | BUNDLE_TEMPLATE_MASK(current_bundle[0].opcode->pipes, | |
736 | current_bundle[1].opcode->pipes, | |
737 | (current_bundle_index == 3 | |
738 | ? current_bundle[2].opcode->pipes | |
739 | : (1 << NO_PIPELINE))); | |
740 | ||
741 | /* Find a template that works, if any. */ | |
742 | match = NULL; | |
743 | for (i = 0; i < sizeof bundle_templates / sizeof bundle_templates[0]; i++) | |
744 | { | |
745 | const struct bundle_template *b = &bundle_templates[i]; | |
746 | if ((b->pipe_mask & compatible_pipes) == b->pipe_mask) | |
747 | { | |
748 | match = b; | |
749 | break; | |
750 | } | |
751 | } | |
752 | ||
753 | if (match == NULL) | |
754 | { | |
755 | current_bundle_index = 0; | |
756 | as_bad (_("Invalid combination of instructions for bundle.")); | |
757 | return; | |
758 | } | |
759 | ||
760 | /* If the section seems to have no alignment set yet, go ahead and | |
761 | make it large enough to hold code. */ | |
762 | if (bfd_get_section_alignment (stdoutput, now_seg) == 0) | |
763 | bfd_set_section_alignment (stdoutput, now_seg, | |
764 | TILEPRO_LOG2_BUNDLE_ALIGNMENT_IN_BYTES); | |
765 | ||
766 | for (j = 0; j < current_bundle_index; j++) | |
767 | current_bundle[j].pipe = match->pipe[j]; | |
768 | ||
769 | if (current_bundle_index == 2 && !tilepro_is_x_pipeline(match->pipe[0])) | |
770 | { | |
771 | /* We are in Y mode with only two instructions, so add an FNOP. */ | |
772 | prepend_nop_to_bundle (TILEPRO_OPC_FNOP); | |
773 | ||
774 | /* Figure out what pipe the fnop must be in via arithmetic. | |
775 | * p0 + p1 + p2 must sum to the sum of TILEPRO_PIPELINE_Y[012]. */ | |
776 | current_bundle[0].pipe = | |
777 | (tilepro_pipeline)((TILEPRO_PIPELINE_Y0 | |
778 | + TILEPRO_PIPELINE_Y1 | |
779 | + TILEPRO_PIPELINE_Y2) - | |
780 | (current_bundle[1].pipe + current_bundle[2].pipe)); | |
781 | } | |
782 | ||
783 | check_illegal_reg_writes (); | |
784 | ||
785 | f = frag_more (TILEPRO_BUNDLE_SIZE_IN_BYTES); | |
786 | ||
787 | /* Check to see if this bundle is at an offset that is a multiple of 8-bytes | |
788 | from the start of the frag. */ | |
789 | addr_mod = frag_now_fix () & (TILEPRO_BUNDLE_ALIGNMENT_IN_BYTES - 1); | |
790 | if (frag_now->has_code && frag_now->insn_addr != addr_mod) | |
791 | as_bad (_("instruction address is not a multiple of 8")); | |
792 | frag_now->insn_addr = addr_mod; | |
793 | frag_now->has_code = 1; | |
794 | ||
795 | tilepro_bundle_bits bits = 0; | |
796 | for (j = 0; j < current_bundle_index; j++) | |
797 | { | |
798 | struct tilepro_instruction *instr = ¤t_bundle[j]; | |
799 | tilepro_pipeline pipeline = instr->pipe; | |
800 | const struct tilepro_opcode *opcode = instr->opcode; | |
801 | ||
802 | bits |= emit_tilepro_instruction (opcode->fixed_bit_values[pipeline], | |
803 | opcode->num_operands, | |
804 | &opcode->operands[pipeline][0], | |
805 | instr->operand_values, | |
806 | f); | |
807 | } | |
808 | ||
809 | number_to_chars_littleendian (f, (unsigned int)bits, 4); | |
810 | number_to_chars_littleendian (f + 4, (unsigned int)(bits >> 32), 4); | |
811 | current_bundle_index = 0; | |
812 | ||
813 | /* Emit DWARF2 debugging information. */ | |
814 | dwarf2_emit_insn (TILEPRO_BUNDLE_SIZE_IN_BYTES); | |
815 | } | |
816 | ||
817 | ||
818 | /* Extend the expression parser to handle hi16(label), etc. | |
819 | as well as SPR names when in the context of parsing an SPR. */ | |
820 | int | |
821 | tilepro_parse_name (char *name, expressionS *e, char *nextcharP) | |
822 | { | |
823 | operatorT op = O_illegal; | |
824 | ||
825 | if (parsing_spr) | |
826 | { | |
827 | void *val = hash_find (spr_hash, name); | |
828 | if (val == NULL) | |
829 | return 0; | |
830 | ||
831 | memset (e, 0, sizeof *e); | |
832 | e->X_op = O_constant; | |
833 | e->X_add_number = ((const struct tilepro_spr *)val)->number; | |
834 | return 1; | |
835 | } | |
836 | ||
837 | if (*nextcharP != '(') | |
838 | { | |
839 | /* hi16, etc. not followed by a paren is just a label with that | |
840 | name. */ | |
841 | return 0; | |
842 | } | |
843 | else | |
844 | { | |
845 | /* Look up the operator in our table. */ | |
846 | void *val = hash_find (special_operator_hash, name); | |
847 | if (val == 0) | |
848 | return 0; | |
849 | op = (operatorT)(long)val; | |
850 | } | |
851 | ||
852 | /* Restore old '(' and skip it. */ | |
853 | *input_line_pointer = '('; | |
854 | ++input_line_pointer; | |
855 | ||
856 | expression (e); | |
857 | ||
858 | if (*input_line_pointer != ')') | |
859 | { | |
860 | as_bad (_("Missing ')'")); | |
861 | *nextcharP = *input_line_pointer; | |
862 | return 0; | |
863 | } | |
864 | /* Skip ')'. */ | |
865 | ++input_line_pointer; | |
866 | ||
867 | if (e->X_op == O_register || e->X_op == O_absent) | |
868 | { | |
869 | as_bad (_("Invalid expression.")); | |
870 | e->X_op = O_constant; | |
871 | e->X_add_number = 0; | |
872 | } | |
873 | else | |
874 | { | |
875 | /* Wrap subexpression with a unary operator. */ | |
876 | symbolS *sym = make_expr_symbol (e); | |
877 | ||
878 | if (sym != e->X_add_symbol) | |
879 | { | |
880 | /* HACK: mark this symbol as a temporary wrapper around a proper | |
881 | expression, so we can unwrap it later once we have communicated | |
882 | the relocation type. */ | |
883 | sym->sy_value.X_md = 1; | |
884 | } | |
885 | ||
886 | memset (e, 0, sizeof *e); | |
887 | e->X_op = op; | |
888 | e->X_add_symbol = sym; | |
889 | e->X_add_number = 0; | |
890 | } | |
891 | ||
892 | *nextcharP = *input_line_pointer; | |
893 | return 1; | |
894 | } | |
895 | ||
896 | ||
897 | /* Parses an expression which must be a register name. */ | |
898 | ||
899 | static void | |
900 | parse_reg_expression (expressionS* expression) | |
901 | { | |
902 | /* Zero everything to make sure we don't miss any flags. */ | |
903 | memset (expression, 0, sizeof *expression); | |
904 | ||
905 | char* regname = input_line_pointer; | |
906 | char terminating_char = get_symbol_end (); | |
907 | ||
908 | void* pval = hash_find (main_reg_hash, regname); | |
909 | ||
910 | if (pval == NULL) | |
911 | as_bad (_("Expected register, got '%s'."), regname); | |
912 | ||
913 | int regno_and_flags = (int)(size_t)pval; | |
914 | int regno = EXTRACT_REGNO(regno_and_flags); | |
915 | ||
916 | if ((regno_and_flags & NONCANONICAL_REG_NAME_FLAG) | |
917 | && require_canonical_reg_names) | |
918 | as_warn (_("Found use of non-canonical register name %s; " | |
919 | "use %s instead."), | |
920 | regname, tilepro_register_names[regno]); | |
921 | ||
922 | /* Restore the old character following the register name. */ | |
923 | *input_line_pointer = terminating_char; | |
924 | ||
925 | /* Fill in the expression fields to indicate it's a register. */ | |
926 | expression->X_op = O_register; | |
927 | expression->X_add_number = regno; | |
928 | } | |
929 | ||
930 | ||
931 | /* Parses and type-checks comma-separated operands in input_line_pointer. */ | |
932 | static void | |
933 | parse_operands (const char *opcode_name, | |
934 | const unsigned char *operands, | |
935 | int num_operands, | |
936 | expressionS *operand_values) | |
937 | { | |
938 | int i; | |
939 | ||
940 | memset (operand_values, 0, num_operands * sizeof operand_values[0]); | |
941 | ||
942 | SKIP_WHITESPACE (); | |
943 | for (i = 0; i < num_operands; i++) | |
944 | { | |
945 | tilepro_operand_type type = tilepro_operands[operands[i]].type; | |
946 | ||
947 | SKIP_WHITESPACE (); | |
948 | ||
949 | if (type == TILEPRO_OP_TYPE_REGISTER) | |
950 | { | |
951 | parse_reg_expression (&operand_values[i]); | |
952 | } | |
953 | else if (*input_line_pointer == '}') | |
954 | { | |
955 | operand_values[i].X_op = O_absent; | |
956 | } | |
957 | else if (type == TILEPRO_OP_TYPE_SPR) | |
958 | { | |
959 | /* Modify the expression parser to add SPRs to the namespace. */ | |
960 | parsing_spr = 1; | |
961 | expression (&operand_values[i]); | |
962 | parsing_spr = 0; | |
963 | } | |
964 | else | |
965 | { | |
966 | expression (&operand_values[i]); | |
967 | } | |
968 | ||
969 | SKIP_WHITESPACE (); | |
970 | ||
971 | if (i + 1 < num_operands) | |
972 | { | |
973 | int separator = (unsigned char)*input_line_pointer++; | |
974 | ||
975 | if (is_end_of_line[separator] || (separator == '}')) | |
976 | { | |
977 | as_bad (_("Too few operands to '%s'."), opcode_name); | |
978 | return; | |
979 | } | |
980 | else if (separator != ',') | |
981 | { | |
982 | as_bad (_("Unexpected character '%c' after operand %d to %s."), | |
983 | (char)separator, i + 1, opcode_name); | |
984 | return; | |
985 | } | |
986 | } | |
987 | ||
988 | /* Arbitrarily use the first valid pipe to get the operand type, | |
989 | since they are all the same. */ | |
990 | switch (tilepro_operands[operands[i]].type) | |
991 | { | |
992 | case TILEPRO_OP_TYPE_REGISTER: | |
993 | /* Handled in parse_reg_expression already. */ | |
994 | break; | |
995 | case TILEPRO_OP_TYPE_SPR: | |
996 | /* Fall through */ | |
997 | case TILEPRO_OP_TYPE_IMMEDIATE: | |
998 | /* Fall through */ | |
999 | case TILEPRO_OP_TYPE_ADDRESS: | |
1000 | if ( operand_values[i].X_op == O_register | |
1001 | || operand_values[i].X_op == O_illegal | |
1002 | || operand_values[i].X_op == O_absent) | |
1003 | as_bad (_("Expected immediate expression")); | |
1004 | break; | |
1005 | default: | |
1006 | abort (); | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | if (!is_end_of_line[(unsigned char)*input_line_pointer]) | |
1011 | { | |
1012 | switch (*input_line_pointer) | |
1013 | { | |
1014 | case '}': | |
1015 | if (!inside_bundle) | |
1016 | as_bad (_("Found '}' when not bundling.")); | |
1017 | ++input_line_pointer; | |
1018 | inside_bundle = 0; | |
1019 | demand_empty_rest_of_line (); | |
1020 | break; | |
1021 | ||
1022 | case ',': | |
1023 | as_bad (_("Too many operands")); | |
1024 | break; | |
1025 | ||
1026 | default: | |
1027 | /* Use default error for unrecognized garbage. */ | |
1028 | demand_empty_rest_of_line (); | |
1029 | break; | |
1030 | } | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | ||
1035 | /* This is the guts of the machine-dependent assembler. STR points to a | |
1036 | machine dependent instruction. This function is supposed to emit | |
1037 | the frags/bytes it assembles to. */ | |
1038 | void | |
1039 | md_assemble (char *str) | |
1040 | { | |
1041 | char old_char; | |
1042 | size_t opname_len; | |
1043 | char *old_input_line_pointer; | |
1044 | const struct tilepro_opcode *op; | |
1045 | int first_pipe; | |
1046 | ||
1047 | /* Split off the opcode and look it up. */ | |
1048 | opname_len = strcspn (str, " {}"); | |
1049 | old_char = str[opname_len]; | |
1050 | str[opname_len] = '\0'; | |
1051 | ||
1052 | op = hash_find(op_hash, str); | |
1053 | str[opname_len] = old_char; | |
1054 | if (op == NULL) | |
1055 | { | |
1056 | as_bad (_("Unknown opcode `%.*s'."), (int)opname_len, str); | |
1057 | return; | |
1058 | } | |
1059 | ||
1060 | /* Prepare to parse the operands. */ | |
1061 | old_input_line_pointer = input_line_pointer; | |
1062 | input_line_pointer = str + opname_len; | |
1063 | SKIP_WHITESPACE (); | |
1064 | ||
1065 | if (current_bundle_index == TILEPRO_MAX_INSTRUCTIONS_PER_BUNDLE) | |
1066 | { | |
1067 | as_bad (_("Too many instructions for bundle.")); | |
1068 | tilepro_flush_bundle (); | |
1069 | } | |
1070 | ||
1071 | /* Make sure we have room for the upcoming bundle before we | |
1072 | create any fixups. Otherwise if we have to switch to a new | |
1073 | frag the fixup dot_value fields will be wrong. */ | |
1074 | frag_grow (TILEPRO_BUNDLE_SIZE_IN_BYTES); | |
1075 | ||
1076 | /* Find a valid pipe for this opcode. */ | |
1077 | for (first_pipe = 0; (op->pipes & (1 << first_pipe)) == 0; first_pipe++) | |
1078 | ; | |
1079 | ||
1080 | /* Call the function that assembles this instruction. */ | |
1081 | current_bundle[current_bundle_index].opcode = op; | |
1082 | parse_operands (op->name, | |
1083 | &op->operands[first_pipe][0], | |
1084 | op->num_operands, | |
1085 | current_bundle[current_bundle_index].operand_values); | |
1086 | ++current_bundle_index; | |
1087 | ||
1088 | /* Restore the saved value of input_line_pointer. */ | |
1089 | input_line_pointer = old_input_line_pointer; | |
1090 | ||
1091 | /* If we weren't inside curly braces, go ahead and emit | |
1092 | this lone instruction as a bundle right now. */ | |
1093 | if (!inside_bundle) | |
1094 | tilepro_flush_bundle (); | |
1095 | } | |
1096 | ||
1097 | static void | |
1098 | s_require_canonical_reg_names (int require) | |
1099 | { | |
1100 | demand_empty_rest_of_line (); | |
1101 | require_canonical_reg_names = require; | |
1102 | } | |
1103 | ||
1104 | static void | |
1105 | s_allow_suspicious_bundles (int allow) | |
1106 | { | |
1107 | demand_empty_rest_of_line (); | |
1108 | allow_suspicious_bundles = allow; | |
1109 | } | |
1110 | ||
1111 | const pseudo_typeS md_pseudo_table[] = | |
1112 | { | |
1113 | {"align", s_align_bytes, 0}, /* Defaulting is invalid (0). */ | |
1114 | {"word", cons, 4}, | |
1115 | {"require_canonical_reg_names", s_require_canonical_reg_names, 1 }, | |
1116 | {"no_require_canonical_reg_names", s_require_canonical_reg_names, 0 }, | |
1117 | {"allow_suspicious_bundles", s_allow_suspicious_bundles, 1 }, | |
1118 | {"no_allow_suspicious_bundles", s_allow_suspicious_bundles, 0 }, | |
1119 | { NULL, 0, 0 } | |
1120 | }; | |
1121 | ||
1122 | /* Equal to MAX_PRECISION in atof-ieee.c */ | |
1123 | #define MAX_LITTLENUMS 6 | |
1124 | ||
1125 | /* Turn the string pointed to by litP into a floating point constant | |
1126 | of type TYPE, and emit the appropriate bytes. The number of | |
1127 | LITTLENUMS emitted is stored in *SIZEP. An error message is | |
1128 | returned, or NULL on OK. */ | |
1129 | ||
1130 | char * | |
1131 | md_atof (int type, char *litP, int *sizeP) | |
1132 | { | |
1133 | int prec; | |
1134 | LITTLENUM_TYPE words[MAX_LITTLENUMS]; | |
1135 | LITTLENUM_TYPE *wordP; | |
1136 | char *t; | |
1137 | ||
1138 | switch (type) | |
1139 | { | |
1140 | case 'f': | |
1141 | case 'F': | |
1142 | prec = 2; | |
1143 | break; | |
1144 | ||
1145 | case 'd': | |
1146 | case 'D': | |
1147 | prec = 4; | |
1148 | break; | |
1149 | ||
1150 | default: | |
1151 | *sizeP = 0; | |
1152 | return _("Bad call to md_atof ()"); | |
1153 | } | |
1154 | t = atof_ieee (input_line_pointer, type, words); | |
1155 | if (t) | |
1156 | input_line_pointer = t; | |
1157 | ||
1158 | *sizeP = prec * sizeof (LITTLENUM_TYPE); | |
1159 | /* This loops outputs the LITTLENUMs in REVERSE order; in accord with | |
1160 | the bigendian 386. */ | |
1161 | for (wordP = words + prec - 1; prec--;) | |
1162 | { | |
1163 | md_number_to_chars (litP, (valueT) (*wordP--), sizeof (LITTLENUM_TYPE)); | |
1164 | litP += sizeof (LITTLENUM_TYPE); | |
1165 | } | |
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | ||
1170 | /* We have no need to default values of symbols. */ | |
1171 | ||
1172 | symbolS * | |
1173 | md_undefined_symbol (char *name ATTRIBUTE_UNUSED) | |
1174 | { | |
1175 | return NULL; | |
1176 | } | |
1177 | ||
1178 | ||
1179 | void | |
1180 | tilepro_cons_fix_new (fragS *frag, | |
1181 | int where, | |
1182 | int nbytes, | |
1183 | expressionS *exp) | |
1184 | { | |
1185 | expressionS subexp; | |
1186 | bfd_reloc_code_real_type reloc = BFD_RELOC_NONE; | |
1187 | int no_overflow = 0; | |
1188 | fixS *fixP; | |
1189 | ||
1190 | /* See if it's one of our special functions. */ | |
1191 | switch (exp->X_op) | |
1192 | { | |
1193 | case O_lo16: | |
1194 | reloc = BFD_RELOC_LO16; | |
1195 | no_overflow = 1; | |
1196 | break; | |
1197 | case O_hi16: | |
1198 | reloc = BFD_RELOC_HI16; | |
1199 | no_overflow = 1; | |
1200 | break; | |
1201 | case O_ha16: | |
1202 | reloc = BFD_RELOC_HI16_S; | |
1203 | no_overflow = 1; | |
1204 | break; | |
1205 | ||
1206 | default: | |
1207 | /* Do nothing. */ | |
1208 | break; | |
1209 | } | |
1210 | ||
1211 | if (reloc != BFD_RELOC_NONE) | |
1212 | { | |
1213 | if (nbytes != 2) | |
1214 | { | |
1215 | as_bad (_("This operator only produces two byte values.")); | |
1216 | nbytes = 2; | |
1217 | } | |
1218 | ||
1219 | memset (&subexp, 0, sizeof subexp); | |
1220 | subexp.X_op = O_symbol; | |
1221 | subexp.X_add_symbol = exp->X_add_symbol; | |
1222 | exp = &subexp; | |
1223 | } | |
1224 | else | |
1225 | { | |
1226 | switch (nbytes) | |
1227 | { | |
1228 | case 1: | |
1229 | reloc = BFD_RELOC_8; | |
1230 | break; | |
1231 | case 2: | |
1232 | reloc = BFD_RELOC_16; | |
1233 | break; | |
1234 | case 4: | |
1235 | reloc = BFD_RELOC_32; | |
1236 | break; | |
1237 | case 8: | |
1238 | reloc = BFD_RELOC_64; | |
1239 | break; | |
1240 | default: | |
1241 | as_bad (_("unsupported BFD relocation size %d"), nbytes); | |
1242 | reloc = BFD_RELOC_32; | |
1243 | break; | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | fixP = fix_new_exp (frag, where, nbytes, exp, 0, reloc); | |
1248 | fixP->tc_fix_data = NULL; | |
1249 | fixP->fx_no_overflow |= no_overflow; | |
1250 | } | |
1251 | ||
1252 | ||
1253 | void | |
1254 | md_apply_fix (fixS *fixP, valueT * valP, segT seg ATTRIBUTE_UNUSED) | |
1255 | { | |
1256 | const struct tilepro_operand *operand; | |
1257 | valueT value = *valP; | |
1258 | char *p; | |
1259 | ||
1260 | /* Leave these for the linker. */ | |
1261 | if (fixP->fx_r_type == BFD_RELOC_VTABLE_INHERIT | |
1262 | || fixP->fx_r_type == BFD_RELOC_VTABLE_ENTRY) | |
1263 | return; | |
1264 | ||
1265 | if (fixP->fx_subsy != (symbolS *) NULL) | |
1266 | { | |
1267 | /* We can't actually support subtracting a symbol. */ | |
1268 | as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex")); | |
1269 | } | |
1270 | ||
1271 | /* Correct relocation types for pc-relativeness. */ | |
1272 | switch (fixP->fx_r_type) | |
1273 | { | |
1274 | #define FIX_PCREL(rtype) \ | |
1275 | case rtype: \ | |
1276 | if (fixP->fx_pcrel) \ | |
1277 | fixP->fx_r_type = rtype##_PCREL; \ | |
1278 | break; \ | |
1279 | \ | |
1280 | case rtype##_PCREL: \ | |
1281 | if (!fixP->fx_pcrel) \ | |
1282 | fixP->fx_r_type = rtype; \ | |
1283 | break | |
1284 | ||
1285 | FIX_PCREL (BFD_RELOC_8); | |
1286 | FIX_PCREL (BFD_RELOC_16); | |
1287 | FIX_PCREL (BFD_RELOC_32); | |
1288 | FIX_PCREL (BFD_RELOC_TILEPRO_IMM16_X0); | |
1289 | FIX_PCREL (BFD_RELOC_TILEPRO_IMM16_X1); | |
1290 | FIX_PCREL (BFD_RELOC_TILEPRO_IMM16_X0_LO); | |
1291 | FIX_PCREL (BFD_RELOC_TILEPRO_IMM16_X1_LO); | |
1292 | FIX_PCREL (BFD_RELOC_TILEPRO_IMM16_X0_HI); | |
1293 | FIX_PCREL (BFD_RELOC_TILEPRO_IMM16_X1_HI); | |
1294 | FIX_PCREL (BFD_RELOC_TILEPRO_IMM16_X0_HA); | |
1295 | FIX_PCREL (BFD_RELOC_TILEPRO_IMM16_X1_HA); | |
1296 | ||
1297 | #undef FIX_PCREL | |
1298 | ||
1299 | default: | |
1300 | /* Do nothing */ | |
1301 | break; | |
1302 | } | |
1303 | ||
1304 | if (fixP->fx_addsy != NULL) | |
1305 | { | |
1306 | #ifdef OBJ_ELF | |
1307 | switch (fixP->fx_r_type) | |
1308 | { | |
1309 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_GD: | |
1310 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_GD: | |
1311 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_IE: | |
1312 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_IE: | |
1313 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_GD_LO: | |
1314 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_GD_LO: | |
1315 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_IE_LO: | |
1316 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_IE_LO: | |
1317 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_GD_HI: | |
1318 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_GD_HI: | |
1319 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_IE_HI: | |
1320 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_IE_HI: | |
1321 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_GD_HA: | |
1322 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_GD_HA: | |
1323 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_IE_HA: | |
1324 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_IE_HA: | |
1325 | case BFD_RELOC_TILEPRO_TLS_DTPMOD32: | |
1326 | case BFD_RELOC_TILEPRO_TLS_DTPOFF32: | |
1327 | case BFD_RELOC_TILEPRO_TLS_TPOFF32: | |
1328 | S_SET_THREAD_LOCAL (fixP->fx_addsy); | |
1329 | break; | |
1330 | ||
1331 | default: | |
1332 | /* Do nothing */ | |
1333 | break; | |
1334 | } | |
1335 | #endif | |
1336 | return; | |
1337 | } | |
1338 | ||
1339 | /* Apply lo16, hi16, ha16, etc. munging. */ | |
1340 | switch (fixP->fx_r_type) | |
1341 | { | |
1342 | case BFD_RELOC_TILEPRO_IMM16_X0_GOT: | |
1343 | case BFD_RELOC_TILEPRO_IMM16_X1_GOT: | |
1344 | *valP = value = apply_special_operator (O_got, value); | |
1345 | break; | |
1346 | ||
1347 | case BFD_RELOC_TILEPRO_IMM16_X0_GOT_LO: | |
1348 | case BFD_RELOC_TILEPRO_IMM16_X1_GOT_LO: | |
1349 | *valP = value = apply_special_operator (O_got_lo16, value); | |
1350 | break; | |
1351 | ||
1352 | case BFD_RELOC_TILEPRO_IMM16_X0_GOT_HI: | |
1353 | case BFD_RELOC_TILEPRO_IMM16_X1_GOT_HI: | |
1354 | *valP = value = apply_special_operator (O_got_hi16, value); | |
1355 | break; | |
1356 | ||
1357 | case BFD_RELOC_TILEPRO_IMM16_X0_GOT_HA: | |
1358 | case BFD_RELOC_TILEPRO_IMM16_X1_GOT_HA: | |
1359 | *valP = value = apply_special_operator (O_got_ha16, value); | |
1360 | break; | |
1361 | ||
1362 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_GD: | |
1363 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_GD: | |
1364 | *valP = value = apply_special_operator (O_tls_gd, value); | |
1365 | break; | |
1366 | ||
1367 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_IE: | |
1368 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_IE: | |
1369 | *valP = value = apply_special_operator (O_tls_ie, value); | |
1370 | break; | |
1371 | ||
1372 | case BFD_RELOC_LO16: | |
1373 | case BFD_RELOC_TILEPRO_IMM16_X0_LO: | |
1374 | case BFD_RELOC_TILEPRO_IMM16_X1_LO: | |
1375 | case BFD_RELOC_TILEPRO_IMM16_X0_LO_PCREL: | |
1376 | case BFD_RELOC_TILEPRO_IMM16_X1_LO_PCREL: | |
1377 | *valP = value = apply_special_operator (O_lo16, value); | |
1378 | break; | |
1379 | ||
1380 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_GD_LO: | |
1381 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_GD_LO: | |
1382 | *valP = value = apply_special_operator (O_tls_gd_lo16, value); | |
1383 | break; | |
1384 | ||
1385 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_IE_LO: | |
1386 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_IE_LO: | |
1387 | *valP = value = apply_special_operator (O_tls_ie_lo16, value); | |
1388 | break; | |
1389 | ||
1390 | case BFD_RELOC_HI16: | |
1391 | case BFD_RELOC_TILEPRO_IMM16_X0_HI: | |
1392 | case BFD_RELOC_TILEPRO_IMM16_X1_HI: | |
1393 | case BFD_RELOC_TILEPRO_IMM16_X0_HI_PCREL: | |
1394 | case BFD_RELOC_TILEPRO_IMM16_X1_HI_PCREL: | |
1395 | *valP = value = apply_special_operator (O_hi16, value); | |
1396 | break; | |
1397 | ||
1398 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_GD_HI: | |
1399 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_GD_HI: | |
1400 | *valP = value = apply_special_operator (O_tls_gd_hi16, value); | |
1401 | break; | |
1402 | ||
1403 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_IE_HI: | |
1404 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_IE_HI: | |
1405 | *valP = value = apply_special_operator (O_tls_ie_hi16, value); | |
1406 | break; | |
1407 | ||
1408 | case BFD_RELOC_HI16_S: | |
1409 | case BFD_RELOC_TILEPRO_IMM16_X0_HA: | |
1410 | case BFD_RELOC_TILEPRO_IMM16_X1_HA: | |
1411 | case BFD_RELOC_TILEPRO_IMM16_X0_HA_PCREL: | |
1412 | case BFD_RELOC_TILEPRO_IMM16_X1_HA_PCREL: | |
1413 | *valP = value = apply_special_operator (O_ha16, value); | |
1414 | break; | |
1415 | ||
1416 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_GD_HA: | |
1417 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_GD_HA: | |
1418 | *valP = value = apply_special_operator (O_tls_gd_ha16, value); | |
1419 | break; | |
1420 | ||
1421 | case BFD_RELOC_TILEPRO_IMM16_X0_TLS_IE_HA: | |
1422 | case BFD_RELOC_TILEPRO_IMM16_X1_TLS_IE_HA: | |
1423 | *valP = value = apply_special_operator (O_tls_ie_ha16, value); | |
1424 | break; | |
1425 | ||
1426 | default: | |
1427 | /* Do nothing */ | |
1428 | break; | |
1429 | } | |
1430 | ||
1431 | p = fixP->fx_frag->fr_literal + fixP->fx_where; | |
1432 | ||
1433 | operand = fixP->tc_fix_data; | |
1434 | if (operand != NULL) | |
1435 | { | |
1436 | /* It's an instruction operand. */ | |
1437 | tilepro_bundle_bits bits = | |
1438 | insert_operand (0, operand, value, fixP->fx_file, fixP->fx_line); | |
1439 | ||
1440 | /* Note that we might either be writing out bits for a bundle or a | |
1441 | static network instruction, which are different sizes, so it's | |
1442 | important to stop touching memory once we run out of bits. ORing in | |
1443 | values is OK since we know the existing bits for this operand are | |
1444 | zero. */ | |
1445 | for (; bits != 0; bits >>= 8) | |
1446 | *p++ |= (char)bits; | |
1447 | } | |
1448 | else | |
1449 | { | |
1450 | /* Some other kind of relocation. */ | |
1451 | switch (fixP->fx_r_type) | |
1452 | { | |
1453 | case BFD_RELOC_8: | |
1454 | case BFD_RELOC_8_PCREL: | |
1455 | md_number_to_chars (p, value, 1); | |
1456 | break; | |
1457 | ||
1458 | case BFD_RELOC_16: | |
1459 | case BFD_RELOC_16_PCREL: | |
1460 | md_number_to_chars (p, value, 2); | |
1461 | break; | |
1462 | ||
1463 | case BFD_RELOC_32: | |
1464 | case BFD_RELOC_32_PCREL: | |
1465 | md_number_to_chars (p, value, 4); | |
1466 | break; | |
1467 | ||
1468 | default: | |
1469 | /* Leave it for the linker. */ | |
1470 | return; | |
1471 | } | |
1472 | } | |
1473 | ||
1474 | fixP->fx_done = 1; | |
1475 | } | |
1476 | ||
1477 | ||
1478 | /* Generate the BFD reloc to be stuck in the object file from the | |
1479 | fixup used internally in the assembler. */ | |
1480 | ||
1481 | arelent * | |
1482 | tc_gen_reloc (asection *sec ATTRIBUTE_UNUSED, fixS *fixp) | |
1483 | { | |
1484 | arelent *reloc; | |
1485 | ||
1486 | reloc = (arelent *) xmalloc (sizeof (arelent)); | |
1487 | reloc->sym_ptr_ptr = (asymbol **) xmalloc (sizeof (asymbol *)); | |
1488 | *reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy); | |
1489 | reloc->address = fixp->fx_frag->fr_address + fixp->fx_where; | |
1490 | ||
1491 | /* Make sure none of our internal relocations make it this far. | |
1492 | They'd better have been fully resolved by this point. */ | |
1493 | gas_assert ((int) fixp->fx_r_type > 0); | |
1494 | ||
1495 | reloc->howto = bfd_reloc_type_lookup (stdoutput, fixp->fx_r_type); | |
1496 | if (reloc->howto == NULL) | |
1497 | { | |
1498 | as_bad_where (fixp->fx_file, fixp->fx_line, | |
1499 | _("cannot represent `%s' relocation in object file"), | |
1500 | bfd_get_reloc_code_name (fixp->fx_r_type)); | |
1501 | return NULL; | |
1502 | } | |
1503 | ||
1504 | if (!fixp->fx_pcrel != !reloc->howto->pc_relative) | |
1505 | { | |
1506 | as_fatal (_("internal error? cannot generate `%s' relocation (%d, %d)"), | |
1507 | bfd_get_reloc_code_name (fixp->fx_r_type), | |
1508 | fixp->fx_pcrel, reloc->howto->pc_relative); | |
1509 | } | |
1510 | gas_assert (!fixp->fx_pcrel == !reloc->howto->pc_relative); | |
1511 | ||
1512 | reloc->addend = fixp->fx_offset; | |
1513 | ||
1514 | return reloc; | |
1515 | } | |
1516 | ||
1517 | ||
1518 | /* The location from which a PC relative jump should be calculated, | |
1519 | given a PC relative reloc. */ | |
1520 | ||
1521 | long | |
1522 | md_pcrel_from (fixS *fixP) | |
1523 | { | |
1524 | return fixP->fx_frag->fr_address + fixP->fx_where; | |
1525 | } | |
1526 | ||
1527 | ||
1528 | /* Return 1 if it's OK to adjust a reloc by replacing the symbol with | |
1529 | a section symbol plus some offset. */ | |
1530 | int | |
1531 | tilepro_fix_adjustable (fixS *fix) | |
1532 | { | |
1533 | /* Prevent all adjustments to global symbols */ | |
1534 | if (S_IS_EXTERNAL (fix->fx_addsy) || S_IS_WEAK (fix->fx_addsy)) | |
1535 | return 0; | |
1536 | ||
1537 | return 1; | |
1538 | } | |
1539 | ||
1540 | ||
1541 | int | |
1542 | tilepro_unrecognized_line (int ch) | |
1543 | { | |
1544 | switch (ch) | |
1545 | { | |
1546 | case '{': | |
1547 | if (inside_bundle) | |
1548 | { | |
1549 | as_bad (_("Found '{' when already bundling.")); | |
1550 | } | |
1551 | else | |
1552 | { | |
1553 | inside_bundle = 1; | |
1554 | current_bundle_index = 0; | |
1555 | } | |
1556 | return 1; | |
1557 | ||
1558 | case '}': | |
1559 | if (!inside_bundle) | |
1560 | { | |
1561 | as_bad (_("Found '}' when not bundling.")); | |
1562 | } | |
1563 | else | |
1564 | { | |
1565 | tilepro_flush_bundle (); | |
1566 | } | |
1567 | ||
1568 | /* Allow '{' to follow on the same line. We also allow ";;", but that | |
1569 | happens automatically because ';' is an end of line marker. */ | |
1570 | SKIP_WHITESPACE (); | |
1571 | if (input_line_pointer[0] == '{') | |
1572 | { | |
1573 | input_line_pointer++; | |
1574 | return tilepro_unrecognized_line ('{'); | |
1575 | } | |
1576 | ||
1577 | demand_empty_rest_of_line (); | |
1578 | return 1; | |
1579 | ||
1580 | default: | |
1581 | break; | |
1582 | } | |
1583 | ||
1584 | /* Not a valid line. */ | |
1585 | return 0; | |
1586 | } | |
1587 | ||
1588 | ||
1589 | /* This is called from HANDLE_ALIGN in write.c. Fill in the contents | |
1590 | of an rs_align_code fragment. */ | |
1591 | ||
1592 | void | |
1593 | tilepro_handle_align (fragS *fragp) | |
1594 | { | |
1595 | int bytes, fix; | |
1596 | char *p; | |
1597 | ||
1598 | if (fragp->fr_type != rs_align_code) | |
1599 | return; | |
1600 | ||
1601 | bytes = fragp->fr_next->fr_address - fragp->fr_address - fragp->fr_fix; | |
1602 | p = fragp->fr_literal + fragp->fr_fix; | |
1603 | fix = 0; | |
1604 | ||
1605 | /* Determine the bits for NOP. */ | |
1606 | const struct tilepro_opcode *nop_opcode = | |
1607 | &tilepro_opcodes[TILEPRO_OPC_NOP]; | |
1608 | tilepro_bundle_bits nop = | |
1609 | ( nop_opcode->fixed_bit_values[TILEPRO_PIPELINE_X0] | |
1610 | | nop_opcode->fixed_bit_values[TILEPRO_PIPELINE_X1]); | |
1611 | ||
1612 | if ((bytes & (TILEPRO_BUNDLE_SIZE_IN_BYTES - 1)) != 0) | |
1613 | { | |
1614 | fix = bytes & (TILEPRO_BUNDLE_SIZE_IN_BYTES - 1); | |
1615 | memset (p, 0, fix); | |
1616 | p += fix; | |
1617 | bytes -= fix; | |
1618 | } | |
1619 | ||
1620 | number_to_chars_littleendian (p, (unsigned int)nop, 4); | |
1621 | number_to_chars_littleendian (p + 4, (unsigned int)(nop >> 32), 4); | |
1622 | fragp->fr_fix += fix; | |
1623 | fragp->fr_var = TILEPRO_BUNDLE_SIZE_IN_BYTES; | |
1624 | } | |
1625 | ||
1626 | /* Standard calling conventions leave the CFA at SP on entry. */ | |
1627 | void | |
1628 | tilepro_cfi_frame_initial_instructions (void) | |
1629 | { | |
1630 | cfi_add_CFA_def_cfa_register (54); | |
1631 | } | |
1632 | ||
1633 | int | |
1634 | tc_tilepro_regname_to_dw2regnum (char *regname) | |
1635 | { | |
1636 | int i; | |
1637 | ||
1638 | for (i = 0; i < TILEPRO_NUM_REGISTERS; i++) | |
1639 | { | |
1640 | if (!strcmp (regname, tilepro_register_names[i])) | |
1641 | return i; | |
1642 | } | |
1643 | ||
1644 | return -1; | |
1645 | } |