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09cae750 | 1 | /* Common hooks for RISC-V. |
8d9254fc | 2 | Copyright (C) 2016-2020 Free Software Foundation, Inc. |
09cae750 PD |
3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC 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, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GCC 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 GCC; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
8e966210 KC |
20 | #include <sstream> |
21 | ||
22 | #define INCLUDE_STRING | |
09cae750 PD |
23 | #include "config.h" |
24 | #include "system.h" | |
25 | #include "coretypes.h" | |
26 | #include "tm.h" | |
27 | #include "common/common-target.h" | |
28 | #include "common/common-target-def.h" | |
29 | #include "opts.h" | |
30 | #include "flags.h" | |
31 | #include "diagnostic-core.h" | |
8e966210 | 32 | #include "config/riscv/riscv-protos.h" |
09cae750 | 33 | |
8e966210 | 34 | #define RISCV_DONT_CARE_VERSION -1 |
09cae750 | 35 | |
8e966210 KC |
36 | /* Subset info. */ |
37 | struct riscv_subset_t | |
09cae750 | 38 | { |
8e966210 | 39 | riscv_subset_t (); |
09cae750 | 40 | |
8e966210 KC |
41 | std::string name; |
42 | int major_version; | |
43 | int minor_version; | |
44 | struct riscv_subset_t *next; | |
45 | }; | |
46 | ||
47 | /* Subset list. */ | |
48 | class riscv_subset_list | |
49 | { | |
50 | private: | |
51 | /* Original arch string. */ | |
52 | const char *m_arch; | |
53 | ||
54 | /* Location of arch string, used for report error. */ | |
55 | location_t m_loc; | |
56 | ||
57 | /* Head of subset info list. */ | |
58 | riscv_subset_t *m_head; | |
59 | ||
60 | /* Tail of subset info list. */ | |
61 | riscv_subset_t *m_tail; | |
62 | ||
63 | /* X-len of m_arch. */ | |
64 | unsigned m_xlen; | |
65 | ||
66 | riscv_subset_list (const char *, location_t); | |
67 | ||
68 | const char *parsing_subset_version (const char *, unsigned *, unsigned *, | |
69 | unsigned, unsigned, bool); | |
70 | ||
71 | const char *parse_std_ext (const char *); | |
72 | ||
73 | const char *parse_sv_or_non_std_ext (const char *, const char *, | |
74 | const char *); | |
75 | ||
76 | public: | |
77 | ~riscv_subset_list (); | |
78 | ||
79 | void add (const char *, int, int); | |
80 | ||
81 | riscv_subset_t *lookup (const char *, | |
82 | int major_version = RISCV_DONT_CARE_VERSION, | |
83 | int minor_version = RISCV_DONT_CARE_VERSION) const; | |
84 | ||
85 | std::string to_string () const; | |
86 | ||
87 | unsigned xlen() const {return m_xlen;}; | |
88 | ||
89 | static riscv_subset_list *parse (const char *, location_t); | |
90 | ||
91 | }; | |
92 | ||
93 | static const char *riscv_supported_std_ext (void); | |
94 | ||
95 | static riscv_subset_list *current_subset_list = NULL; | |
96 | ||
97 | riscv_subset_t::riscv_subset_t () | |
98 | : name (), major_version (0), minor_version (0), next (NULL) | |
99 | { | |
100 | } | |
101 | ||
102 | riscv_subset_list::riscv_subset_list (const char *arch, location_t loc) | |
103 | : m_arch (arch), m_loc (loc), m_head (NULL), m_tail (NULL), m_xlen (0) | |
104 | { | |
105 | } | |
106 | ||
107 | riscv_subset_list::~riscv_subset_list () | |
108 | { | |
109 | if (!m_head) | |
110 | return; | |
111 | ||
112 | riscv_subset_t *item = this->m_head; | |
113 | while (item != NULL) | |
09cae750 | 114 | { |
8e966210 KC |
115 | riscv_subset_t *next = item->next; |
116 | delete item; | |
117 | item = next; | |
09cae750 | 118 | } |
8e966210 | 119 | } |
09cae750 | 120 | |
8e966210 | 121 | /* Add new subset to list. */ |
09cae750 | 122 | |
8e966210 KC |
123 | void |
124 | riscv_subset_list::add (const char *subset, int major_version, | |
125 | int minor_version) | |
126 | { | |
127 | riscv_subset_t *s = new riscv_subset_t (); | |
09baee1a | 128 | |
8e966210 KC |
129 | if (m_head == NULL) |
130 | m_head = s; | |
131 | ||
132 | s->name = subset; | |
133 | s->major_version = major_version; | |
134 | s->minor_version = minor_version; | |
135 | s->next = NULL; | |
136 | ||
137 | if (m_tail != NULL) | |
138 | m_tail->next = s; | |
139 | ||
140 | m_tail = s; | |
141 | } | |
142 | ||
143 | /* Convert subset info to string with explicit version info. */ | |
144 | ||
145 | std::string | |
146 | riscv_subset_list::to_string () const | |
147 | { | |
148 | std::ostringstream oss; | |
149 | oss << "rv" << m_xlen; | |
150 | ||
151 | bool first = true; | |
152 | riscv_subset_t *subset = m_head; | |
153 | ||
154 | while (subset != NULL) | |
09cae750 | 155 | { |
8e966210 KC |
156 | if (!first) |
157 | oss << '_'; | |
158 | first = false; | |
159 | ||
160 | oss << subset->name | |
161 | << subset->major_version | |
162 | << 'p' | |
163 | << subset->minor_version; | |
164 | subset = subset->next; | |
165 | } | |
166 | ||
167 | return oss.str (); | |
168 | } | |
169 | ||
170 | /* Find subset in list with version checking, return NULL if not found. | |
171 | major/minor version checking can be ignored if major_version/minor_version | |
172 | is RISCV_DONT_CARE_VERSION. */ | |
173 | ||
174 | riscv_subset_t * | |
175 | riscv_subset_list::lookup (const char *subset, int major_version, | |
176 | int minor_version) const | |
177 | { | |
178 | riscv_subset_t *s; | |
179 | ||
180 | for (s = m_head; s != NULL; s = s->next) | |
181 | if (strcasecmp (s->name.c_str (), subset) == 0) | |
182 | { | |
183 | if ((major_version != RISCV_DONT_CARE_VERSION) | |
184 | && (s->major_version != major_version)) | |
185 | return NULL; | |
186 | ||
187 | if ((minor_version != RISCV_DONT_CARE_VERSION) | |
188 | && (s->minor_version != minor_version)) | |
189 | return NULL; | |
190 | ||
191 | return s; | |
192 | } | |
193 | ||
194 | return s; | |
195 | } | |
196 | ||
197 | /* Return string which contains all supported standard extensions in | |
198 | canonical order. */ | |
09cae750 | 199 | |
8e966210 KC |
200 | static const char * |
201 | riscv_supported_std_ext (void) | |
202 | { | |
203 | return "mafdqlcbjtpvn"; | |
204 | } | |
205 | ||
206 | /* Parsing subset version. | |
09baee1a | 207 | |
8e966210 KC |
208 | Return Value: |
209 | Points to the end of version | |
09cae750 | 210 | |
8e966210 KC |
211 | Arguments: |
212 | `p`: Current parsing position. | |
213 | `major_version`: Parsing result of major version, using | |
214 | default_major_version if version is not present in arch string. | |
215 | `minor_version`: Parsing result of minor version, set to 0 if version is | |
216 | not present in arch string, but set to `default_minor_version` if | |
217 | `major_version` using default_major_version. | |
218 | `default_major_version`: Default major version. | |
219 | `default_minor_version`: Default minor version. | |
220 | `std_ext_p`: True if parsing std extension. */ | |
09cae750 | 221 | |
8e966210 KC |
222 | const char * |
223 | riscv_subset_list::parsing_subset_version (const char *p, | |
224 | unsigned *major_version, | |
225 | unsigned *minor_version, | |
226 | unsigned default_major_version, | |
227 | unsigned default_minor_version, | |
228 | bool std_ext_p) | |
229 | { | |
230 | bool major_p = true; | |
231 | unsigned version = 0; | |
232 | unsigned major = 0; | |
233 | unsigned minor = 0; | |
234 | char np; | |
235 | ||
236 | for (; *p; ++p) | |
237 | { | |
238 | if (*p == 'p') | |
09cae750 | 239 | { |
8e966210 | 240 | np = *(p + 1); |
09cae750 | 241 | |
8e966210 | 242 | if (!ISDIGIT (np)) |
09cae750 | 243 | { |
8e966210 KC |
244 | /* Might be beginning of `p` extension. */ |
245 | if (std_ext_p) | |
246 | { | |
247 | *major_version = version; | |
248 | *minor_version = 0; | |
249 | return p; | |
250 | } | |
251 | else | |
252 | { | |
904f3daa ML |
253 | error_at (m_loc, "%<-march=%s%>: Expect number " |
254 | "after %<%dp%>.", m_arch, version); | |
8e966210 KC |
255 | return NULL; |
256 | } | |
09cae750 | 257 | } |
8e966210 KC |
258 | |
259 | major = version; | |
260 | major_p = false; | |
261 | version = 0; | |
09cae750 | 262 | } |
8e966210 KC |
263 | else if (ISDIGIT (*p)) |
264 | version = (version * 10) + (*p - '0'); | |
265 | else | |
266 | break; | |
09cae750 | 267 | } |
8e966210 KC |
268 | |
269 | if (major_p) | |
270 | major = version; | |
271 | else | |
272 | minor = version; | |
273 | ||
274 | if (major == 0 && minor == 0) | |
275 | { | |
276 | /* We didn't find any version string, use default version. */ | |
277 | *major_version = default_major_version; | |
278 | *minor_version = default_minor_version; | |
279 | } | |
280 | else | |
281 | { | |
282 | *major_version = major; | |
283 | *minor_version = minor; | |
284 | } | |
285 | return p; | |
286 | } | |
287 | ||
288 | /* Parsing function for standard extensions. | |
289 | ||
290 | Return Value: | |
291 | Points to the end of extensions. | |
292 | ||
293 | Arguments: | |
294 | `p`: Current parsing position. */ | |
295 | ||
296 | const char * | |
297 | riscv_subset_list::parse_std_ext (const char *p) | |
298 | { | |
299 | const char *all_std_exts = riscv_supported_std_ext (); | |
300 | const char *std_exts = all_std_exts; | |
301 | ||
302 | unsigned major_version = 0; | |
303 | unsigned minor_version = 0; | |
304 | char std_ext = '\0'; | |
305 | ||
306 | /* First letter must start with i, e or g. */ | |
307 | switch (*p) | |
09baee1a | 308 | { |
8e966210 KC |
309 | case 'i': |
310 | p++; | |
311 | p = parsing_subset_version (p, &major_version, &minor_version, | |
312 | /* default_major_version= */ 2, | |
313 | /* default_minor_version= */ 0, | |
314 | /* std_ext_p= */ true); | |
315 | add ("i", major_version, minor_version); | |
316 | break; | |
317 | ||
318 | case 'e': | |
09baee1a | 319 | p++; |
8e966210 KC |
320 | p = parsing_subset_version (p, &major_version, &minor_version, |
321 | /* default_major_version= */ 1, | |
322 | /* default_minor_version= */ 9, | |
323 | /* std_ext_p= */ true); | |
09baee1a | 324 | |
8e966210 | 325 | add ("e", major_version, minor_version); |
09baee1a | 326 | |
8e966210 | 327 | if (m_xlen > 32) |
09baee1a | 328 | { |
a3f9f006 ML |
329 | error_at (m_loc, "%<-march=%s%>: rv%de is not a valid base ISA", |
330 | m_arch, m_xlen); | |
8e966210 | 331 | return NULL; |
09baee1a | 332 | } |
8e966210 | 333 | break; |
09baee1a | 334 | |
8e966210 KC |
335 | case 'g': |
336 | p++; | |
337 | p = parsing_subset_version (p, &major_version, &minor_version, | |
338 | /* default_major_version= */ 2, | |
339 | /* default_minor_version= */ 0, | |
340 | /* std_ext_p= */ true); | |
341 | add ("i", major_version, minor_version); | |
09baee1a | 342 | |
8e966210 KC |
343 | for (; *std_exts != 'q'; std_exts++) |
344 | { | |
345 | const char subset[] = {*std_exts, '\0'}; | |
346 | add (subset, major_version, minor_version); | |
347 | } | |
348 | break; | |
09baee1a | 349 | |
8e966210 | 350 | default: |
904f3daa ML |
351 | error_at (m_loc, "%<-march=%s%>: first ISA subset must be %<e%>, " |
352 | "%<i%> or %<g%>", m_arch); | |
8e966210 | 353 | return NULL; |
09baee1a | 354 | } |
8e966210 KC |
355 | |
356 | while (*p) | |
09cae750 | 357 | { |
8e966210 KC |
358 | char subset[2] = {0, 0}; |
359 | ||
360 | if (*p == 'x' || *p == 's') | |
361 | break; | |
362 | ||
363 | if (*p == '_') | |
364 | { | |
365 | p++; | |
366 | continue; | |
367 | } | |
368 | ||
369 | std_ext = *p; | |
370 | ||
371 | /* Checking canonical order. */ | |
372 | while (*std_exts && std_ext != *std_exts) | |
373 | std_exts++; | |
374 | ||
375 | if (std_ext != *std_exts) | |
376 | { | |
377 | if (strchr (all_std_exts, std_ext) == NULL) | |
904f3daa | 378 | error_at (m_loc, "%<-march=%s%>: unsupported ISA subset %<%c%>", |
8e966210 KC |
379 | m_arch, *p); |
380 | else | |
381 | error_at (m_loc, | |
a3f9f006 | 382 | "%<-march=%s%>: ISA string is not in canonical order. " |
904f3daa | 383 | "%<%c%>", m_arch, *p); |
8e966210 KC |
384 | return NULL; |
385 | } | |
386 | ||
387 | std_exts++; | |
388 | ||
389 | p++; | |
390 | p = parsing_subset_version (p, &major_version, &minor_version, | |
391 | /* default_major_version= */ 2, | |
392 | /* default_minor_version= */ 0, | |
393 | /* std_ext_p= */ true); | |
394 | ||
395 | subset[0] = std_ext; | |
396 | ||
397 | add (subset, major_version, minor_version); | |
09cae750 | 398 | } |
8e966210 KC |
399 | return p; |
400 | } | |
09cae750 | 401 | |
8e966210 | 402 | /* Parsing function for non-standard and supervisor extensions. |
09cae750 | 403 | |
8e966210 KC |
404 | Return Value: |
405 | Points to the end of extensions. | |
406 | ||
407 | Arguments: | |
408 | `p`: Current parsing position. | |
409 | `ext_type`: What kind of extensions, 'x', 's' or 'sx'. | |
410 | `ext_type_str`: Full name for kind of extension. */ | |
411 | ||
412 | const char * | |
413 | riscv_subset_list::parse_sv_or_non_std_ext (const char *p, | |
414 | const char *ext_type, | |
415 | const char *ext_type_str) | |
416 | { | |
417 | unsigned major_version = 0; | |
418 | unsigned minor_version = 0; | |
419 | size_t ext_type_len = strlen (ext_type); | |
420 | ||
421 | while (*p) | |
09cae750 | 422 | { |
8e966210 KC |
423 | if (*p == '_') |
424 | { | |
425 | p++; | |
426 | continue; | |
427 | } | |
428 | ||
429 | if (strncmp (p, ext_type, ext_type_len) != 0) | |
430 | break; | |
431 | ||
432 | /* It's non-standard supervisor extension if it prefix with sx. */ | |
433 | if ((ext_type[0] == 's') && (ext_type_len == 1) | |
434 | && (*(p + 1) == 'x')) | |
435 | break; | |
436 | ||
437 | char *subset = xstrdup (p); | |
438 | char *q = subset; | |
439 | const char *end_of_version; | |
440 | ||
441 | while (*++q != '\0' && *q != '_' && !ISDIGIT (*q)) | |
442 | ; | |
443 | ||
444 | end_of_version | |
445 | = parsing_subset_version (q, &major_version, &minor_version, | |
446 | /* default_major_version= */ 2, | |
447 | /* default_minor_version= */ 0, | |
448 | /* std_ext_p= */ FALSE); | |
449 | ||
450 | *q = '\0'; | |
451 | ||
452 | add (subset, major_version, minor_version); | |
453 | free (subset); | |
454 | p += end_of_version - subset; | |
455 | ||
456 | if (*p != '\0' && *p != '_') | |
457 | { | |
a3f9f006 | 458 | error_at (m_loc, "%<-march=%s%>: %s must separate with _", |
8e966210 KC |
459 | m_arch, ext_type_str); |
460 | return NULL; | |
461 | } | |
09cae750 | 462 | } |
8e966210 KC |
463 | |
464 | return p; | |
465 | } | |
466 | ||
467 | /* Parsing arch string to subset list, return NULL if parsing failed. */ | |
468 | ||
469 | riscv_subset_list * | |
470 | riscv_subset_list::parse (const char *arch, location_t loc) | |
471 | { | |
472 | riscv_subset_list *subset_list = new riscv_subset_list (arch, loc); | |
473 | const char *p = arch; | |
474 | if (strncmp (p, "rv32", 4) == 0) | |
475 | { | |
476 | subset_list->m_xlen = 32; | |
477 | p += 4; | |
478 | } | |
479 | else if (strncmp (p, "rv64", 4) == 0) | |
480 | { | |
481 | subset_list->m_xlen = 64; | |
482 | p += 4; | |
483 | } | |
484 | else | |
485 | { | |
a3f9f006 | 486 | error_at (loc, "%<-march=%s%>: ISA string must begin with rv32 or rv64", |
8e966210 KC |
487 | arch); |
488 | goto fail; | |
489 | } | |
490 | ||
491 | /* Parsing standard extension. */ | |
492 | p = subset_list->parse_std_ext (p); | |
493 | ||
494 | if (p == NULL) | |
495 | goto fail; | |
496 | ||
497 | /* Parsing non-standard extension. */ | |
498 | p = subset_list->parse_sv_or_non_std_ext (p, "x", "non-standard extension"); | |
499 | ||
500 | if (p == NULL) | |
501 | goto fail; | |
502 | ||
503 | /* Parsing supervisor extension. */ | |
504 | p = subset_list->parse_sv_or_non_std_ext (p, "s", "supervisor extension"); | |
505 | ||
506 | if (p == NULL) | |
507 | goto fail; | |
508 | ||
509 | /* Parsing non-standard supervisor extension. */ | |
510 | p = subset_list->parse_sv_or_non_std_ext | |
511 | (p, "sx", "non-standard supervisor extension"); | |
512 | ||
513 | if (p == NULL) | |
514 | goto fail; | |
515 | ||
285cf766 MB |
516 | if (*p != '\0') |
517 | { | |
518 | error_at (loc, "%<-march=%s%>: unexpected ISA string at end: %qs", | |
519 | arch, p); | |
520 | goto fail; | |
521 | } | |
522 | ||
8e966210 KC |
523 | return subset_list; |
524 | ||
525 | fail: | |
526 | delete subset_list; | |
527 | return NULL; | |
528 | } | |
529 | ||
530 | /* Return the current arch string. */ | |
531 | ||
532 | std::string | |
533 | riscv_arch_str () | |
534 | { | |
535 | gcc_assert (current_subset_list); | |
536 | return current_subset_list->to_string (); | |
537 | } | |
538 | ||
539 | /* Parse a RISC-V ISA string into an option mask. Must clear or set all arch | |
540 | dependent mask bits, in case more than one -march string is passed. */ | |
541 | ||
542 | static void | |
543 | riscv_parse_arch_string (const char *isa, int *flags, location_t loc) | |
544 | { | |
545 | riscv_subset_list *subset_list; | |
546 | subset_list = riscv_subset_list::parse (isa, loc); | |
547 | if (!subset_list) | |
548 | return; | |
549 | ||
550 | if (subset_list->xlen () == 32) | |
551 | *flags &= ~MASK_64BIT; | |
552 | else if (subset_list->xlen () == 64) | |
553 | *flags |= MASK_64BIT; | |
554 | ||
555 | *flags &= ~MASK_RVE; | |
556 | if (subset_list->lookup ("e")) | |
557 | *flags |= MASK_RVE; | |
558 | ||
559 | *flags &= ~MASK_MUL; | |
560 | if (subset_list->lookup ("m")) | |
561 | *flags |= MASK_MUL; | |
562 | ||
563 | *flags &= ~MASK_ATOMIC; | |
564 | if (subset_list->lookup ("a")) | |
565 | *flags |= MASK_ATOMIC; | |
566 | ||
567 | *flags &= ~(MASK_HARD_FLOAT | MASK_DOUBLE_FLOAT); | |
568 | if (subset_list->lookup ("f")) | |
569 | *flags |= MASK_HARD_FLOAT; | |
570 | ||
571 | if (subset_list->lookup ("d")) | |
572 | *flags |= MASK_DOUBLE_FLOAT; | |
573 | ||
76d4accf JW |
574 | *flags &= ~MASK_RVC; |
575 | if (subset_list->lookup ("c")) | |
576 | *flags |= MASK_RVC; | |
577 | ||
8e966210 KC |
578 | if (current_subset_list) |
579 | delete current_subset_list; | |
580 | ||
581 | current_subset_list = subset_list; | |
09cae750 PD |
582 | } |
583 | ||
584 | /* Implement TARGET_HANDLE_OPTION. */ | |
585 | ||
586 | static bool | |
587 | riscv_handle_option (struct gcc_options *opts, | |
588 | struct gcc_options *opts_set ATTRIBUTE_UNUSED, | |
589 | const struct cl_decoded_option *decoded, | |
590 | location_t loc) | |
591 | { | |
592 | switch (decoded->opt_index) | |
593 | { | |
594 | case OPT_march_: | |
595 | riscv_parse_arch_string (decoded->arg, &opts->x_target_flags, loc); | |
596 | return true; | |
597 | ||
598 | default: | |
599 | return true; | |
600 | } | |
601 | } | |
602 | ||
603 | /* Implement TARGET_OPTION_OPTIMIZATION_TABLE. */ | |
604 | static const struct default_options riscv_option_optimization_table[] = | |
605 | { | |
606 | { OPT_LEVELS_1_PLUS, OPT_fsection_anchors, NULL, 1 }, | |
09cae750 PD |
607 | { OPT_LEVELS_2_PLUS, OPT_free, NULL, 1 }, |
608 | { OPT_LEVELS_NONE, 0, NULL, 0 } | |
609 | }; | |
610 | ||
611 | #undef TARGET_OPTION_OPTIMIZATION_TABLE | |
612 | #define TARGET_OPTION_OPTIMIZATION_TABLE riscv_option_optimization_table | |
613 | ||
614 | #undef TARGET_HANDLE_OPTION | |
615 | #define TARGET_HANDLE_OPTION riscv_handle_option | |
616 | ||
617 | struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER; |