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1 /* Configurable Xtensa ISA support.
2 *
3 * Copyright (c) 2001-2011 Tensilica Inc.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
19 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
20 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
21 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
22 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #include "qemu/osdep.h"
26 #include "xtensa-isa.h"
27 #include "xtensa-isa-internal.h"
28
29 xtensa_isa_status xtisa_errno;
30 char xtisa_error_msg[1024];
31
32
33 xtensa_isa_status xtensa_isa_errno(xtensa_isa isa __attribute__ ((unused)))
34 {
35 return xtisa_errno;
36 }
37
38
39 char *xtensa_isa_error_msg(xtensa_isa isa __attribute__ ((unused)))
40 {
41 return xtisa_error_msg;
42 }
43
44
45 #define CHECK_ALLOC(MEM, ERRVAL) \
46 do { \
47 if ((MEM) == 0) { \
48 xtisa_errno = xtensa_isa_out_of_memory; \
49 strcpy(xtisa_error_msg, "out of memory"); \
50 return ERRVAL; \
51 } \
52 } while (0)
53
54 #define CHECK_ALLOC_FOR_INIT(MEM, ERRVAL, ERRNO_P, ERROR_MSG_P) \
55 do { \
56 if ((MEM) == 0) { \
57 xtisa_errno = xtensa_isa_out_of_memory; \
58 strcpy(xtisa_error_msg, "out of memory"); \
59 if (ERRNO_P) { \
60 *(ERRNO_P) = xtisa_errno; \
61 } \
62 if (ERROR_MSG_P) { \
63 *(ERROR_MSG_P) = xtisa_error_msg; \
64 } \
65 return ERRVAL; \
66 } \
67 } while (0)
68
69
70 /* Instruction buffers. */
71
72 int xtensa_insnbuf_size(xtensa_isa isa)
73 {
74 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
75 return intisa->insnbuf_size;
76 }
77
78
79 xtensa_insnbuf xtensa_insnbuf_alloc(xtensa_isa isa)
80 {
81 xtensa_insnbuf result = (xtensa_insnbuf)
82 malloc(xtensa_insnbuf_size(isa) * sizeof(xtensa_insnbuf_word));
83
84 CHECK_ALLOC(result, 0);
85 return result;
86 }
87
88
89 void xtensa_insnbuf_free(xtensa_isa isa __attribute__ ((unused)),
90 xtensa_insnbuf buf)
91 {
92 free(buf);
93 }
94
95
96 /*
97 * Given <byte_index>, the index of a byte in a xtensa_insnbuf, our
98 * internal representation of a xtensa instruction word, return the index of
99 * its word and the bit index of its low order byte in the xtensa_insnbuf.
100 */
101
102 static inline int byte_to_word_index(int byte_index)
103 {
104 return byte_index / sizeof(xtensa_insnbuf_word);
105 }
106
107
108 static inline int byte_to_bit_index(int byte_index)
109 {
110 return (byte_index & 0x3) * 8;
111 }
112
113
114 /*
115 * Copy an instruction in the 32-bit words pointed at by "insn" to
116 * characters pointed at by "cp". This is more complicated than you
117 * might think because we want 16-bit instructions in bytes 2 & 3 for
118 * big-endian configurations. This function allows us to specify
119 * which byte in "insn" to start with and which way to increment,
120 * allowing trivial implementation for both big- and little-endian
121 * configurations....and it seems to make pretty good code for
122 * both.
123 */
124
125 int xtensa_insnbuf_to_chars(xtensa_isa isa,
126 const xtensa_insnbuf insn,
127 unsigned char *cp,
128 int num_chars)
129 {
130 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
131 int insn_size = xtensa_isa_maxlength(isa);
132 int fence_post, start, increment, i, byte_count;
133 xtensa_format fmt;
134
135 if (num_chars == 0) {
136 num_chars = insn_size;
137 }
138
139 if (intisa->is_big_endian) {
140 start = insn_size - 1;
141 increment = -1;
142 } else {
143 start = 0;
144 increment = 1;
145 }
146
147 /*
148 * Find the instruction format. Do nothing if the buffer does not contain
149 * a valid instruction since we need to know how many bytes to copy.
150 */
151 fmt = xtensa_format_decode(isa, insn);
152 if (fmt == XTENSA_UNDEFINED) {
153 return XTENSA_UNDEFINED;
154 }
155
156 byte_count = xtensa_format_length(isa, fmt);
157 if (byte_count == XTENSA_UNDEFINED) {
158 return XTENSA_UNDEFINED;
159 }
160
161 if (byte_count > num_chars) {
162 xtisa_errno = xtensa_isa_buffer_overflow;
163 strcpy(xtisa_error_msg, "output buffer too small for instruction");
164 return XTENSA_UNDEFINED;
165 }
166
167 fence_post = start + (byte_count * increment);
168
169 for (i = start; i != fence_post; i += increment, ++cp) {
170 int word_inx = byte_to_word_index(i);
171 int bit_inx = byte_to_bit_index(i);
172
173 *cp = (insn[word_inx] >> bit_inx) & 0xff;
174 }
175
176 return byte_count;
177 }
178
179
180 /*
181 * Inward conversion from byte stream to xtensa_insnbuf. See
182 * xtensa_insnbuf_to_chars for a discussion of why this is complicated
183 * by endianness.
184 */
185
186 void xtensa_insnbuf_from_chars(xtensa_isa isa,
187 xtensa_insnbuf insn,
188 const unsigned char *cp,
189 int num_chars)
190 {
191 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
192 int max_size, insn_size, fence_post, start, increment, i;
193
194 max_size = xtensa_isa_maxlength(isa);
195
196 /* Decode the instruction length so we know how many bytes to read. */
197 insn_size = (intisa->length_decode_fn)(cp);
198 if (insn_size == XTENSA_UNDEFINED) {
199 /*
200 * This should never happen when the byte stream contains a
201 * valid instruction. Just read the maximum number of bytes....
202 */
203 insn_size = max_size;
204 }
205
206 if (num_chars == 0 || num_chars > insn_size) {
207 num_chars = insn_size;
208 }
209
210 if (intisa->is_big_endian) {
211 start = max_size - 1;
212 increment = -1;
213 } else {
214 start = 0;
215 increment = 1;
216 }
217
218 fence_post = start + (num_chars * increment);
219 memset(insn, 0, xtensa_insnbuf_size(isa) * sizeof(xtensa_insnbuf_word));
220
221 for (i = start; i != fence_post; i += increment, ++cp) {
222 int word_inx = byte_to_word_index(i);
223 int bit_inx = byte_to_bit_index(i);
224
225 insn[word_inx] |= (*cp & 0xff) << bit_inx;
226 }
227 }
228
229
230 /* ISA information. */
231
232 xtensa_isa xtensa_isa_init(void *xtensa_modules, xtensa_isa_status *errno_p,
233 char **error_msg_p)
234 {
235 xtensa_isa_internal *isa = xtensa_modules;
236 int n, is_user;
237
238 /* Set up the opcode name lookup table. */
239 isa->opname_lookup_table =
240 malloc(isa->num_opcodes * sizeof(xtensa_lookup_entry));
241 CHECK_ALLOC_FOR_INIT(isa->opname_lookup_table, NULL, errno_p, error_msg_p);
242 for (n = 0; n < isa->num_opcodes; n++) {
243 isa->opname_lookup_table[n].key = isa->opcodes[n].name;
244 isa->opname_lookup_table[n].u.opcode = n;
245 }
246 qsort(isa->opname_lookup_table, isa->num_opcodes,
247 sizeof(xtensa_lookup_entry), xtensa_isa_name_compare);
248
249 /* Set up the state name lookup table. */
250 isa->state_lookup_table =
251 malloc(isa->num_states * sizeof(xtensa_lookup_entry));
252 CHECK_ALLOC_FOR_INIT(isa->state_lookup_table, NULL, errno_p, error_msg_p);
253 for (n = 0; n < isa->num_states; n++) {
254 isa->state_lookup_table[n].key = isa->states[n].name;
255 isa->state_lookup_table[n].u.state = n;
256 }
257 qsort(isa->state_lookup_table, isa->num_states,
258 sizeof(xtensa_lookup_entry), xtensa_isa_name_compare);
259
260 /* Set up the sysreg name lookup table. */
261 isa->sysreg_lookup_table =
262 malloc(isa->num_sysregs * sizeof(xtensa_lookup_entry));
263 CHECK_ALLOC_FOR_INIT(isa->sysreg_lookup_table, NULL, errno_p, error_msg_p);
264 for (n = 0; n < isa->num_sysregs; n++) {
265 isa->sysreg_lookup_table[n].key = isa->sysregs[n].name;
266 isa->sysreg_lookup_table[n].u.sysreg = n;
267 }
268 qsort(isa->sysreg_lookup_table, isa->num_sysregs,
269 sizeof(xtensa_lookup_entry), xtensa_isa_name_compare);
270
271 /* Set up the user & system sysreg number tables. */
272 for (is_user = 0; is_user < 2; is_user++) {
273 isa->sysreg_table[is_user] =
274 malloc((isa->max_sysreg_num[is_user] + 1) * sizeof(xtensa_sysreg));
275 CHECK_ALLOC_FOR_INIT(isa->sysreg_table[is_user], NULL,
276 errno_p, error_msg_p);
277
278 for (n = 0; n <= isa->max_sysreg_num[is_user]; n++) {
279 isa->sysreg_table[is_user][n] = XTENSA_UNDEFINED;
280 }
281 }
282 for (n = 0; n < isa->num_sysregs; n++) {
283 xtensa_sysreg_internal *sreg = &isa->sysregs[n];
284 is_user = sreg->is_user;
285
286 if (sreg->number >= 0) {
287 isa->sysreg_table[is_user][sreg->number] = n;
288 }
289 }
290
291 /* Set up the interface lookup table. */
292 isa->interface_lookup_table =
293 malloc(isa->num_interfaces * sizeof(xtensa_lookup_entry));
294 CHECK_ALLOC_FOR_INIT(isa->interface_lookup_table, NULL, errno_p,
295 error_msg_p);
296 for (n = 0; n < isa->num_interfaces; n++) {
297 isa->interface_lookup_table[n].key = isa->interfaces[n].name;
298 isa->interface_lookup_table[n].u.intf = n;
299 }
300 qsort(isa->interface_lookup_table, isa->num_interfaces,
301 sizeof(xtensa_lookup_entry), xtensa_isa_name_compare);
302
303 /* Set up the funcUnit lookup table. */
304 isa->funcUnit_lookup_table =
305 malloc(isa->num_funcUnits * sizeof(xtensa_lookup_entry));
306 CHECK_ALLOC_FOR_INIT(isa->funcUnit_lookup_table, NULL, errno_p,
307 error_msg_p);
308 for (n = 0; n < isa->num_funcUnits; n++) {
309 isa->funcUnit_lookup_table[n].key = isa->funcUnits[n].name;
310 isa->funcUnit_lookup_table[n].u.fun = n;
311 }
312 qsort(isa->funcUnit_lookup_table, isa->num_funcUnits,
313 sizeof(xtensa_lookup_entry), xtensa_isa_name_compare);
314
315 isa->insnbuf_size = ((isa->insn_size + sizeof(xtensa_insnbuf_word) - 1) /
316 sizeof(xtensa_insnbuf_word));
317 isa->num_stages = XTENSA_UNDEFINED;
318
319 return (xtensa_isa)isa;
320 }
321
322
323 void xtensa_isa_free(xtensa_isa isa)
324 {
325 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
326 int n;
327
328 /*
329 * With this version of the code, the xtensa_isa structure is not
330 * dynamically allocated, so this function is not essential. Free
331 * the memory allocated by xtensa_isa_init and restore the xtensa_isa
332 * structure to its initial state.
333 */
334
335 if (intisa->opname_lookup_table) {
336 free(intisa->opname_lookup_table);
337 intisa->opname_lookup_table = 0;
338 }
339
340 if (intisa->state_lookup_table) {
341 free(intisa->state_lookup_table);
342 intisa->state_lookup_table = 0;
343 }
344
345 if (intisa->sysreg_lookup_table) {
346 free(intisa->sysreg_lookup_table);
347 intisa->sysreg_lookup_table = 0;
348 }
349 for (n = 0; n < 2; n++) {
350 if (intisa->sysreg_table[n]) {
351 free(intisa->sysreg_table[n]);
352 intisa->sysreg_table[n] = 0;
353 }
354 }
355
356 if (intisa->interface_lookup_table) {
357 free(intisa->interface_lookup_table);
358 intisa->interface_lookup_table = 0;
359 }
360
361 if (intisa->funcUnit_lookup_table) {
362 free(intisa->funcUnit_lookup_table);
363 intisa->funcUnit_lookup_table = 0;
364 }
365 }
366
367
368 int xtensa_isa_name_compare(const void *v1, const void *v2)
369 {
370 xtensa_lookup_entry *e1 = (xtensa_lookup_entry *)v1;
371 xtensa_lookup_entry *e2 = (xtensa_lookup_entry *)v2;
372
373 return g_ascii_strcasecmp(e1->key, e2->key);
374 }
375
376
377 int xtensa_isa_maxlength(xtensa_isa isa)
378 {
379 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
380 return intisa->insn_size;
381 }
382
383
384 int xtensa_isa_length_from_chars(xtensa_isa isa, const unsigned char *cp)
385 {
386 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
387 return (intisa->length_decode_fn)(cp);
388 }
389
390
391 int xtensa_isa_num_pipe_stages(xtensa_isa isa)
392 {
393 xtensa_opcode opcode;
394 xtensa_funcUnit_use *use;
395 int num_opcodes, num_uses;
396 int i, stage, max_stage;
397 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
398
399 /* Only compute the value once. */
400 if (intisa->num_stages != XTENSA_UNDEFINED) {
401 return intisa->num_stages;
402 }
403
404 max_stage = -1;
405
406 num_opcodes = xtensa_isa_num_opcodes(isa);
407 for (opcode = 0; opcode < num_opcodes; opcode++) {
408 num_uses = xtensa_opcode_num_funcUnit_uses(isa, opcode);
409 for (i = 0; i < num_uses; i++) {
410 use = xtensa_opcode_funcUnit_use(isa, opcode, i);
411 stage = use->stage;
412 if (stage > max_stage) {
413 max_stage = stage;
414 }
415 }
416 }
417
418 intisa->num_stages = max_stage + 1;
419 return intisa->num_states;
420 }
421
422
423 int xtensa_isa_num_formats(xtensa_isa isa)
424 {
425 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
426 return intisa->num_formats;
427 }
428
429
430 int xtensa_isa_num_opcodes(xtensa_isa isa)
431 {
432 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
433 return intisa->num_opcodes;
434 }
435
436
437 int xtensa_isa_num_regfiles(xtensa_isa isa)
438 {
439 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
440 return intisa->num_regfiles;
441 }
442
443
444 int xtensa_isa_num_states(xtensa_isa isa)
445 {
446 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
447 return intisa->num_states;
448 }
449
450
451 int xtensa_isa_num_sysregs(xtensa_isa isa)
452 {
453 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
454 return intisa->num_sysregs;
455 }
456
457
458 int xtensa_isa_num_interfaces(xtensa_isa isa)
459 {
460 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
461 return intisa->num_interfaces;
462 }
463
464
465 int xtensa_isa_num_funcUnits(xtensa_isa isa)
466 {
467 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
468 return intisa->num_funcUnits;
469 }
470
471
472 /* Instruction formats. */
473
474
475 #define CHECK_FORMAT(INTISA, FMT, ERRVAL) \
476 do { \
477 if ((FMT) < 0 || (FMT) >= (INTISA)->num_formats) { \
478 xtisa_errno = xtensa_isa_bad_format; \
479 strcpy(xtisa_error_msg, "invalid format specifier"); \
480 return ERRVAL; \
481 } \
482 } while (0)
483
484
485 #define CHECK_SLOT(INTISA, FMT, SLOT, ERRVAL) \
486 do { \
487 if ((SLOT) < 0 || (SLOT) >= (INTISA)->formats[FMT].num_slots) { \
488 xtisa_errno = xtensa_isa_bad_slot; \
489 strcpy(xtisa_error_msg, "invalid slot specifier"); \
490 return ERRVAL; \
491 } \
492 } while (0)
493
494
495 const char *xtensa_format_name(xtensa_isa isa, xtensa_format fmt)
496 {
497 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
498
499 CHECK_FORMAT(intisa, fmt, NULL);
500 return intisa->formats[fmt].name;
501 }
502
503
504 xtensa_format xtensa_format_lookup(xtensa_isa isa, const char *fmtname)
505 {
506 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
507 int fmt;
508
509 if (!fmtname || !*fmtname) {
510 xtisa_errno = xtensa_isa_bad_format;
511 strcpy(xtisa_error_msg, "invalid format name");
512 return XTENSA_UNDEFINED;
513 }
514
515 for (fmt = 0; fmt < intisa->num_formats; fmt++) {
516 if (g_ascii_strcasecmp(fmtname, intisa->formats[fmt].name) == 0) {
517 return fmt;
518 }
519 }
520
521 xtisa_errno = xtensa_isa_bad_format;
522 sprintf(xtisa_error_msg, "format \"%s\" not recognized", fmtname);
523 return XTENSA_UNDEFINED;
524 }
525
526
527 xtensa_format xtensa_format_decode(xtensa_isa isa, const xtensa_insnbuf insn)
528 {
529 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
530 xtensa_format fmt;
531
532 fmt = (intisa->format_decode_fn)(insn);
533 if (fmt != XTENSA_UNDEFINED) {
534 return fmt;
535 }
536
537 xtisa_errno = xtensa_isa_bad_format;
538 strcpy(xtisa_error_msg, "cannot decode instruction format");
539 return XTENSA_UNDEFINED;
540 }
541
542
543 int xtensa_format_encode(xtensa_isa isa, xtensa_format fmt,
544 xtensa_insnbuf insn)
545 {
546 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
547
548 CHECK_FORMAT(intisa, fmt, -1);
549 (*intisa->formats[fmt].encode_fn)(insn);
550 return 0;
551 }
552
553
554 int xtensa_format_length(xtensa_isa isa, xtensa_format fmt)
555 {
556 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
557
558 CHECK_FORMAT(intisa, fmt, XTENSA_UNDEFINED);
559 return intisa->formats[fmt].length;
560 }
561
562
563 int xtensa_format_num_slots(xtensa_isa isa, xtensa_format fmt)
564 {
565 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
566
567 CHECK_FORMAT(intisa, fmt, XTENSA_UNDEFINED);
568 return intisa->formats[fmt].num_slots;
569 }
570
571
572 xtensa_opcode xtensa_format_slot_nop_opcode(xtensa_isa isa, xtensa_format fmt,
573 int slot)
574 {
575 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
576 int slot_id;
577
578 CHECK_FORMAT(intisa, fmt, XTENSA_UNDEFINED);
579 CHECK_SLOT(intisa, fmt, slot, XTENSA_UNDEFINED);
580
581 slot_id = intisa->formats[fmt].slot_id[slot];
582 return xtensa_opcode_lookup(isa, intisa->slots[slot_id].nop_name);
583 }
584
585
586 int xtensa_format_get_slot(xtensa_isa isa, xtensa_format fmt, int slot,
587 const xtensa_insnbuf insn, xtensa_insnbuf slotbuf)
588 {
589 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
590 int slot_id;
591
592 CHECK_FORMAT(intisa, fmt, -1);
593 CHECK_SLOT(intisa, fmt, slot, -1);
594
595 slot_id = intisa->formats[fmt].slot_id[slot];
596 (*intisa->slots[slot_id].get_fn)(insn, slotbuf);
597 return 0;
598 }
599
600
601 int xtensa_format_set_slot(xtensa_isa isa, xtensa_format fmt, int slot,
602 xtensa_insnbuf insn, const xtensa_insnbuf slotbuf)
603 {
604 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
605 int slot_id;
606
607 CHECK_FORMAT(intisa, fmt, -1);
608 CHECK_SLOT(intisa, fmt, slot, -1);
609
610 slot_id = intisa->formats[fmt].slot_id[slot];
611 (*intisa->slots[slot_id].set_fn)(insn, slotbuf);
612 return 0;
613 }
614
615
616 /* Opcode information. */
617
618
619 #define CHECK_OPCODE(INTISA, OPC, ERRVAL) \
620 do { \
621 if ((OPC) < 0 || (OPC) >= (INTISA)->num_opcodes) { \
622 xtisa_errno = xtensa_isa_bad_opcode; \
623 strcpy(xtisa_error_msg, "invalid opcode specifier"); \
624 return ERRVAL; \
625 } \
626 } while (0)
627
628
629 xtensa_opcode xtensa_opcode_lookup(xtensa_isa isa, const char *opname)
630 {
631 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
632 xtensa_lookup_entry entry, *result = 0;
633
634 if (!opname || !*opname) {
635 xtisa_errno = xtensa_isa_bad_opcode;
636 strcpy(xtisa_error_msg, "invalid opcode name");
637 return XTENSA_UNDEFINED;
638 }
639
640 if (intisa->num_opcodes != 0) {
641 entry.key = opname;
642 result = bsearch(&entry, intisa->opname_lookup_table,
643 intisa->num_opcodes, sizeof(xtensa_lookup_entry),
644 xtensa_isa_name_compare);
645 }
646
647 if (!result) {
648 xtisa_errno = xtensa_isa_bad_opcode;
649 sprintf(xtisa_error_msg, "opcode \"%s\" not recognized", opname);
650 return XTENSA_UNDEFINED;
651 }
652
653 return result->u.opcode;
654 }
655
656
657 xtensa_opcode xtensa_opcode_decode(xtensa_isa isa, xtensa_format fmt, int slot,
658 const xtensa_insnbuf slotbuf)
659 {
660 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
661 int slot_id;
662 xtensa_opcode opc;
663
664 CHECK_FORMAT(intisa, fmt, XTENSA_UNDEFINED);
665 CHECK_SLOT(intisa, fmt, slot, XTENSA_UNDEFINED);
666
667 slot_id = intisa->formats[fmt].slot_id[slot];
668
669 opc = (intisa->slots[slot_id].opcode_decode_fn) (slotbuf);
670 if (opc != XTENSA_UNDEFINED) {
671 return opc;
672 }
673
674 xtisa_errno = xtensa_isa_bad_opcode;
675 strcpy(xtisa_error_msg, "cannot decode opcode");
676 return XTENSA_UNDEFINED;
677 }
678
679
680 int xtensa_opcode_encode(xtensa_isa isa, xtensa_format fmt, int slot,
681 xtensa_insnbuf slotbuf, xtensa_opcode opc)
682 {
683 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
684 int slot_id;
685 xtensa_opcode_encode_fn encode_fn;
686
687 CHECK_FORMAT(intisa, fmt, -1);
688 CHECK_SLOT(intisa, fmt, slot, -1);
689 CHECK_OPCODE(intisa, opc, -1);
690
691 slot_id = intisa->formats[fmt].slot_id[slot];
692 encode_fn = intisa->opcodes[opc].encode_fns[slot_id];
693 if (!encode_fn) {
694 xtisa_errno = xtensa_isa_wrong_slot;
695 sprintf(xtisa_error_msg,
696 "opcode \"%s\" is not allowed in slot %d of format \"%s\"",
697 intisa->opcodes[opc].name, slot, intisa->formats[fmt].name);
698 return -1;
699 }
700 (*encode_fn)(slotbuf);
701 return 0;
702 }
703
704
705 const char *xtensa_opcode_name(xtensa_isa isa, xtensa_opcode opc)
706 {
707 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
708
709 CHECK_OPCODE(intisa, opc, NULL);
710 return intisa->opcodes[opc].name;
711 }
712
713
714 int xtensa_opcode_is_branch(xtensa_isa isa, xtensa_opcode opc)
715 {
716 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
717
718 CHECK_OPCODE(intisa, opc, XTENSA_UNDEFINED);
719 if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_BRANCH) != 0) {
720 return 1;
721 }
722 return 0;
723 }
724
725
726 int xtensa_opcode_is_jump(xtensa_isa isa, xtensa_opcode opc)
727 {
728 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
729
730 CHECK_OPCODE(intisa, opc, XTENSA_UNDEFINED);
731 if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_JUMP) != 0) {
732 return 1;
733 }
734 return 0;
735 }
736
737
738 int xtensa_opcode_is_loop(xtensa_isa isa, xtensa_opcode opc)
739 {
740 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
741
742 CHECK_OPCODE(intisa, opc, XTENSA_UNDEFINED);
743 if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_LOOP) != 0) {
744 return 1;
745 }
746 return 0;
747 }
748
749
750 int xtensa_opcode_is_call(xtensa_isa isa, xtensa_opcode opc)
751 {
752 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
753
754 CHECK_OPCODE(intisa, opc, XTENSA_UNDEFINED);
755 if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_CALL) != 0) {
756 return 1;
757 }
758 return 0;
759 }
760
761
762 int xtensa_opcode_num_operands(xtensa_isa isa, xtensa_opcode opc)
763 {
764 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
765 int iclass_id;
766
767 CHECK_OPCODE(intisa, opc, XTENSA_UNDEFINED);
768 iclass_id = intisa->opcodes[opc].iclass_id;
769 return intisa->iclasses[iclass_id].num_operands;
770 }
771
772
773 int xtensa_opcode_num_stateOperands(xtensa_isa isa, xtensa_opcode opc)
774 {
775 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
776 int iclass_id;
777
778 CHECK_OPCODE(intisa, opc, XTENSA_UNDEFINED);
779 iclass_id = intisa->opcodes[opc].iclass_id;
780 return intisa->iclasses[iclass_id].num_stateOperands;
781 }
782
783
784 int xtensa_opcode_num_interfaceOperands(xtensa_isa isa, xtensa_opcode opc)
785 {
786 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
787 int iclass_id;
788
789 CHECK_OPCODE(intisa, opc, XTENSA_UNDEFINED);
790 iclass_id = intisa->opcodes[opc].iclass_id;
791 return intisa->iclasses[iclass_id].num_interfaceOperands;
792 }
793
794
795 int xtensa_opcode_num_funcUnit_uses(xtensa_isa isa, xtensa_opcode opc)
796 {
797 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
798
799 CHECK_OPCODE(intisa, opc, XTENSA_UNDEFINED);
800 return intisa->opcodes[opc].num_funcUnit_uses;
801 }
802
803
804 xtensa_funcUnit_use *xtensa_opcode_funcUnit_use(xtensa_isa isa,
805 xtensa_opcode opc, int u)
806 {
807 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
808
809 CHECK_OPCODE(intisa, opc, NULL);
810 if (u < 0 || u >= intisa->opcodes[opc].num_funcUnit_uses) {
811 xtisa_errno = xtensa_isa_bad_funcUnit;
812 sprintf(xtisa_error_msg, "invalid functional unit use number (%d); "
813 "opcode \"%s\" has %d", u, intisa->opcodes[opc].name,
814 intisa->opcodes[opc].num_funcUnit_uses);
815 return NULL;
816 }
817 return &intisa->opcodes[opc].funcUnit_uses[u];
818 }
819
820
821 /* Operand information. */
822
823
824 #define CHECK_OPERAND(INTISA, OPC, ICLASS, OPND, ERRVAL) \
825 do { \
826 if ((OPND) < 0 || (OPND) >= (ICLASS)->num_operands) { \
827 xtisa_errno = xtensa_isa_bad_operand; \
828 sprintf(xtisa_error_msg, "invalid operand number (%d); " \
829 "opcode \"%s\" has %d operands", (OPND), \
830 (INTISA)->opcodes[(OPC)].name, (ICLASS)->num_operands); \
831 return ERRVAL; \
832 } \
833 } while (0)
834
835
836 static xtensa_operand_internal *get_operand(xtensa_isa_internal *intisa,
837 xtensa_opcode opc, int opnd)
838 {
839 xtensa_iclass_internal *iclass;
840 int iclass_id, operand_id;
841
842 CHECK_OPCODE(intisa, opc, NULL);
843 iclass_id = intisa->opcodes[opc].iclass_id;
844 iclass = &intisa->iclasses[iclass_id];
845 CHECK_OPERAND(intisa, opc, iclass, opnd, NULL);
846 operand_id = iclass->operands[opnd].u.operand_id;
847 return &intisa->operands[operand_id];
848 }
849
850
851 const char *xtensa_operand_name(xtensa_isa isa, xtensa_opcode opc, int opnd)
852 {
853 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
854 xtensa_operand_internal *intop;
855
856 intop = get_operand(intisa, opc, opnd);
857 if (!intop) {
858 return NULL;
859 }
860 return intop->name;
861 }
862
863
864 int xtensa_operand_is_visible(xtensa_isa isa, xtensa_opcode opc, int opnd)
865 {
866 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
867 xtensa_iclass_internal *iclass;
868 int iclass_id, operand_id;
869 xtensa_operand_internal *intop;
870
871 CHECK_OPCODE(intisa, opc, XTENSA_UNDEFINED);
872 iclass_id = intisa->opcodes[opc].iclass_id;
873 iclass = &intisa->iclasses[iclass_id];
874 CHECK_OPERAND(intisa, opc, iclass, opnd, XTENSA_UNDEFINED);
875
876 /* Special case for "sout" operands. */
877 if (iclass->operands[opnd].inout == 's') {
878 return 0;
879 }
880
881 operand_id = iclass->operands[opnd].u.operand_id;
882 intop = &intisa->operands[operand_id];
883
884 if ((intop->flags & XTENSA_OPERAND_IS_INVISIBLE) == 0) {
885 return 1;
886 }
887 return 0;
888 }
889
890
891 char xtensa_operand_inout(xtensa_isa isa, xtensa_opcode opc, int opnd)
892 {
893 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
894 xtensa_iclass_internal *iclass;
895 int iclass_id;
896 char inout;
897
898 CHECK_OPCODE(intisa, opc, 0);
899 iclass_id = intisa->opcodes[opc].iclass_id;
900 iclass = &intisa->iclasses[iclass_id];
901 CHECK_OPERAND(intisa, opc, iclass, opnd, 0);
902 inout = iclass->operands[opnd].inout;
903
904 /* Special case for "sout" and "_sin" operands. */
905 if (inout == 's') {
906 return 'o';
907 }
908 if (inout == 't') {
909 return 'i';
910 }
911 return inout;
912 }
913
914
915 int xtensa_operand_get_field(xtensa_isa isa, xtensa_opcode opc, int opnd,
916 xtensa_format fmt, int slot,
917 const xtensa_insnbuf slotbuf, uint32_t *valp)
918 {
919 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
920 xtensa_operand_internal *intop;
921 int slot_id;
922 xtensa_get_field_fn get_fn;
923
924 intop = get_operand(intisa, opc, opnd);
925 if (!intop) {
926 return -1;
927 }
928
929 CHECK_FORMAT(intisa, fmt, -1);
930 CHECK_SLOT(intisa, fmt, slot, -1);
931
932 slot_id = intisa->formats[fmt].slot_id[slot];
933 if (intop->field_id == XTENSA_UNDEFINED) {
934 xtisa_errno = xtensa_isa_no_field;
935 strcpy(xtisa_error_msg, "implicit operand has no field");
936 return -1;
937 }
938 get_fn = intisa->slots[slot_id].get_field_fns[intop->field_id];
939 if (!get_fn) {
940 xtisa_errno = xtensa_isa_wrong_slot;
941 sprintf(xtisa_error_msg,
942 "operand \"%s\" does not exist in slot %d of format \"%s\"",
943 intop->name, slot, intisa->formats[fmt].name);
944 return -1;
945 }
946 *valp = (*get_fn)(slotbuf);
947 return 0;
948 }
949
950
951 int xtensa_operand_set_field(xtensa_isa isa, xtensa_opcode opc, int opnd,
952 xtensa_format fmt, int slot,
953 xtensa_insnbuf slotbuf, uint32_t val)
954 {
955 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
956 xtensa_operand_internal *intop;
957 int slot_id;
958 xtensa_set_field_fn set_fn;
959
960 intop = get_operand(intisa, opc, opnd);
961 if (!intop) {
962 return -1;
963 }
964
965 CHECK_FORMAT(intisa, fmt, -1);
966 CHECK_SLOT(intisa, fmt, slot, -1);
967
968 slot_id = intisa->formats[fmt].slot_id[slot];
969 if (intop->field_id == XTENSA_UNDEFINED) {
970 xtisa_errno = xtensa_isa_no_field;
971 strcpy(xtisa_error_msg, "implicit operand has no field");
972 return -1;
973 }
974 set_fn = intisa->slots[slot_id].set_field_fns[intop->field_id];
975 if (!set_fn) {
976 xtisa_errno = xtensa_isa_wrong_slot;
977 sprintf(xtisa_error_msg,
978 "operand \"%s\" does not exist in slot %d of format \"%s\"",
979 intop->name, slot, intisa->formats[fmt].name);
980 return -1;
981 }
982 (*set_fn)(slotbuf, val);
983 return 0;
984 }
985
986
987 int xtensa_operand_encode(xtensa_isa isa, xtensa_opcode opc, int opnd,
988 uint32_t *valp)
989 {
990 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
991 xtensa_operand_internal *intop;
992 uint32_t test_val, orig_val;
993
994 intop = get_operand(intisa, opc, opnd);
995 if (!intop) {
996 return -1;
997 }
998
999 if (!intop->encode) {
1000 /*
1001 * This is a default operand for a field. How can we tell if the
1002 * value fits in the field? Write the value into the field,
1003 * read it back, and then make sure we get the same value.
1004 */
1005 static xtensa_insnbuf tmpbuf;
1006 int slot_id;
1007
1008 if (!tmpbuf) {
1009 tmpbuf = xtensa_insnbuf_alloc(isa);
1010 CHECK_ALLOC(tmpbuf, -1);
1011 }
1012
1013 /*
1014 * A default operand is always associated with a field,
1015 * but check just to be sure....
1016 */
1017 if (intop->field_id == XTENSA_UNDEFINED) {
1018 xtisa_errno = xtensa_isa_internal_error;
1019 strcpy(xtisa_error_msg, "operand has no field");
1020 return -1;
1021 }
1022
1023 /* Find some slot that includes the field. */
1024 for (slot_id = 0; slot_id < intisa->num_slots; slot_id++) {
1025 xtensa_get_field_fn get_fn =
1026 intisa->slots[slot_id].get_field_fns[intop->field_id];
1027 xtensa_set_field_fn set_fn =
1028 intisa->slots[slot_id].set_field_fns[intop->field_id];
1029
1030 if (get_fn && set_fn) {
1031 (*set_fn)(tmpbuf, *valp);
1032 return (*get_fn)(tmpbuf) != *valp;
1033 }
1034 }
1035
1036 /* Couldn't find any slot containing the field.... */
1037 xtisa_errno = xtensa_isa_no_field;
1038 strcpy(xtisa_error_msg, "field does not exist in any slot");
1039 return -1;
1040 }
1041
1042 /*
1043 * Encode the value. In some cases, the encoding function may detect
1044 * errors, but most of the time the only way to determine if the value
1045 * was successfully encoded is to decode it and check if it matches
1046 * the original value.
1047 */
1048 orig_val = *valp;
1049 if ((*intop->encode)(valp) ||
1050 (test_val = *valp, (*intop->decode)(&test_val)) ||
1051 test_val != orig_val) {
1052 xtisa_errno = xtensa_isa_bad_value;
1053 sprintf(xtisa_error_msg, "cannot encode operand value 0x%08x", *valp);
1054 return -1;
1055 }
1056
1057 return 0;
1058 }
1059
1060
1061 int xtensa_operand_decode(xtensa_isa isa, xtensa_opcode opc, int opnd,
1062 uint32_t *valp)
1063 {
1064 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1065 xtensa_operand_internal *intop;
1066
1067 intop = get_operand(intisa, opc, opnd);
1068 if (!intop) {
1069 return -1;
1070 }
1071
1072 /* Use identity function for "default" operands. */
1073 if (!intop->decode) {
1074 return 0;
1075 }
1076
1077 if ((*intop->decode)(valp)) {
1078 xtisa_errno = xtensa_isa_bad_value;
1079 sprintf(xtisa_error_msg, "cannot decode operand value 0x%08x", *valp);
1080 return -1;
1081 }
1082 return 0;
1083 }
1084
1085
1086 int xtensa_operand_is_register(xtensa_isa isa, xtensa_opcode opc, int opnd)
1087 {
1088 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1089 xtensa_operand_internal *intop;
1090
1091 intop = get_operand(intisa, opc, opnd);
1092 if (!intop) {
1093 return XTENSA_UNDEFINED;
1094 }
1095
1096 if ((intop->flags & XTENSA_OPERAND_IS_REGISTER) != 0) {
1097 return 1;
1098 }
1099 return 0;
1100 }
1101
1102
1103 xtensa_regfile xtensa_operand_regfile(xtensa_isa isa, xtensa_opcode opc,
1104 int opnd)
1105 {
1106 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1107 xtensa_operand_internal *intop;
1108
1109 intop = get_operand(intisa, opc, opnd);
1110 if (!intop) {
1111 return XTENSA_UNDEFINED;
1112 }
1113
1114 return intop->regfile;
1115 }
1116
1117
1118 int xtensa_operand_num_regs(xtensa_isa isa, xtensa_opcode opc, int opnd)
1119 {
1120 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1121 xtensa_operand_internal *intop;
1122
1123 intop = get_operand(intisa, opc, opnd);
1124 if (!intop) {
1125 return XTENSA_UNDEFINED;
1126 }
1127
1128 return intop->num_regs;
1129 }
1130
1131
1132 int xtensa_operand_is_known_reg(xtensa_isa isa, xtensa_opcode opc, int opnd)
1133 {
1134 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1135 xtensa_operand_internal *intop;
1136
1137 intop = get_operand(intisa, opc, opnd);
1138 if (!intop) {
1139 return XTENSA_UNDEFINED;
1140 }
1141
1142 if ((intop->flags & XTENSA_OPERAND_IS_UNKNOWN) == 0) {
1143 return 1;
1144 }
1145 return 0;
1146 }
1147
1148
1149 int xtensa_operand_is_PCrelative(xtensa_isa isa, xtensa_opcode opc, int opnd)
1150 {
1151 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1152 xtensa_operand_internal *intop;
1153
1154 intop = get_operand(intisa, opc, opnd);
1155 if (!intop) {
1156 return XTENSA_UNDEFINED;
1157 }
1158
1159 if ((intop->flags & XTENSA_OPERAND_IS_PCRELATIVE) != 0) {
1160 return 1;
1161 }
1162 return 0;
1163 }
1164
1165
1166 int xtensa_operand_do_reloc(xtensa_isa isa, xtensa_opcode opc, int opnd,
1167 uint32_t *valp, uint32_t pc)
1168 {
1169 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1170 xtensa_operand_internal *intop;
1171
1172 intop = get_operand(intisa, opc, opnd);
1173 if (!intop) {
1174 return -1;
1175 }
1176
1177 if ((intop->flags & XTENSA_OPERAND_IS_PCRELATIVE) == 0) {
1178 return 0;
1179 }
1180
1181 if (!intop->do_reloc) {
1182 xtisa_errno = xtensa_isa_internal_error;
1183 strcpy(xtisa_error_msg, "operand missing do_reloc function");
1184 return -1;
1185 }
1186
1187 if ((*intop->do_reloc)(valp, pc)) {
1188 xtisa_errno = xtensa_isa_bad_value;
1189 sprintf(xtisa_error_msg,
1190 "do_reloc failed for value 0x%08x at PC 0x%08x", *valp, pc);
1191 return -1;
1192 }
1193
1194 return 0;
1195 }
1196
1197
1198 int xtensa_operand_undo_reloc(xtensa_isa isa, xtensa_opcode opc, int opnd,
1199 uint32_t *valp, uint32_t pc)
1200 {
1201 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1202 xtensa_operand_internal *intop;
1203
1204 intop = get_operand(intisa, opc, opnd);
1205 if (!intop) {
1206 return -1;
1207 }
1208
1209 if ((intop->flags & XTENSA_OPERAND_IS_PCRELATIVE) == 0) {
1210 return 0;
1211 }
1212
1213 if (!intop->undo_reloc) {
1214 xtisa_errno = xtensa_isa_internal_error;
1215 strcpy(xtisa_error_msg, "operand missing undo_reloc function");
1216 return -1;
1217 }
1218
1219 if ((*intop->undo_reloc)(valp, pc)) {
1220 xtisa_errno = xtensa_isa_bad_value;
1221 sprintf(xtisa_error_msg,
1222 "undo_reloc failed for value 0x%08x at PC 0x%08x", *valp, pc);
1223 return -1;
1224 }
1225
1226 return 0;
1227 }
1228
1229
1230 /* State Operands. */
1231
1232
1233 #define CHECK_STATE_OPERAND(INTISA, OPC, ICLASS, STOP, ERRVAL) \
1234 do { \
1235 if ((STOP) < 0 || (STOP) >= (ICLASS)->num_stateOperands) { \
1236 xtisa_errno = xtensa_isa_bad_operand; \
1237 sprintf(xtisa_error_msg, "invalid state operand number (%d); " \
1238 "opcode \"%s\" has %d state operands", (STOP), \
1239 (INTISA)->opcodes[(OPC)].name, \
1240 (ICLASS)->num_stateOperands); \
1241 return ERRVAL; \
1242 } \
1243 } while (0)
1244
1245
1246 xtensa_state xtensa_stateOperand_state(xtensa_isa isa, xtensa_opcode opc,
1247 int stOp)
1248 {
1249 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1250 xtensa_iclass_internal *iclass;
1251 int iclass_id;
1252
1253 CHECK_OPCODE(intisa, opc, XTENSA_UNDEFINED);
1254 iclass_id = intisa->opcodes[opc].iclass_id;
1255 iclass = &intisa->iclasses[iclass_id];
1256 CHECK_STATE_OPERAND(intisa, opc, iclass, stOp, XTENSA_UNDEFINED);
1257 return iclass->stateOperands[stOp].u.state;
1258 }
1259
1260
1261 char xtensa_stateOperand_inout(xtensa_isa isa, xtensa_opcode opc, int stOp)
1262 {
1263 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1264 xtensa_iclass_internal *iclass;
1265 int iclass_id;
1266
1267 CHECK_OPCODE(intisa, opc, 0);
1268 iclass_id = intisa->opcodes[opc].iclass_id;
1269 iclass = &intisa->iclasses[iclass_id];
1270 CHECK_STATE_OPERAND(intisa, opc, iclass, stOp, 0);
1271 return iclass->stateOperands[stOp].inout;
1272 }
1273
1274
1275 /* Interface Operands. */
1276
1277
1278 #define CHECK_INTERFACE_OPERAND(INTISA, OPC, ICLASS, IFOP, ERRVAL) \
1279 do { \
1280 if ((IFOP) < 0 || (IFOP) >= (ICLASS)->num_interfaceOperands) { \
1281 xtisa_errno = xtensa_isa_bad_operand; \
1282 sprintf(xtisa_error_msg, \
1283 "invalid interface operand number (%d); " \
1284 "opcode \"%s\" has %d interface operands", (IFOP), \
1285 (INTISA)->opcodes[(OPC)].name, \
1286 (ICLASS)->num_interfaceOperands); \
1287 return ERRVAL; \
1288 } \
1289 } while (0)
1290
1291
1292 xtensa_interface xtensa_interfaceOperand_interface(xtensa_isa isa,
1293 xtensa_opcode opc,
1294 int ifOp)
1295 {
1296 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1297 xtensa_iclass_internal *iclass;
1298 int iclass_id;
1299
1300 CHECK_OPCODE(intisa, opc, XTENSA_UNDEFINED);
1301 iclass_id = intisa->opcodes[opc].iclass_id;
1302 iclass = &intisa->iclasses[iclass_id];
1303 CHECK_INTERFACE_OPERAND(intisa, opc, iclass, ifOp, XTENSA_UNDEFINED);
1304 return iclass->interfaceOperands[ifOp];
1305 }
1306
1307
1308 /* Register Files. */
1309
1310
1311 #define CHECK_REGFILE(INTISA, RF, ERRVAL) \
1312 do { \
1313 if ((RF) < 0 || (RF) >= (INTISA)->num_regfiles) { \
1314 xtisa_errno = xtensa_isa_bad_regfile; \
1315 strcpy(xtisa_error_msg, "invalid regfile specifier"); \
1316 return ERRVAL; \
1317 } \
1318 } while (0)
1319
1320
1321 xtensa_regfile xtensa_regfile_lookup(xtensa_isa isa, const char *name)
1322 {
1323 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1324 int n;
1325
1326 if (!name || !*name) {
1327 xtisa_errno = xtensa_isa_bad_regfile;
1328 strcpy(xtisa_error_msg, "invalid regfile name");
1329 return XTENSA_UNDEFINED;
1330 }
1331
1332 /* The expected number of regfiles is small; use a linear search. */
1333 for (n = 0; n < intisa->num_regfiles; n++) {
1334 if (!strcmp(intisa->regfiles[n].name, name)) {
1335 return n;
1336 }
1337 }
1338
1339 xtisa_errno = xtensa_isa_bad_regfile;
1340 sprintf(xtisa_error_msg, "regfile \"%s\" not recognized", name);
1341 return XTENSA_UNDEFINED;
1342 }
1343
1344
1345 xtensa_regfile xtensa_regfile_lookup_shortname(xtensa_isa isa,
1346 const char *shortname)
1347 {
1348 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1349 int n;
1350
1351 if (!shortname || !*shortname) {
1352 xtisa_errno = xtensa_isa_bad_regfile;
1353 strcpy(xtisa_error_msg, "invalid regfile shortname");
1354 return XTENSA_UNDEFINED;
1355 }
1356
1357 /* The expected number of regfiles is small; use a linear search. */
1358 for (n = 0; n < intisa->num_regfiles; n++) {
1359 /*
1360 * Ignore regfile views since they always have the same shortnames
1361 * as their parents.
1362 */
1363 if (intisa->regfiles[n].parent != n) {
1364 continue;
1365 }
1366 if (!strcmp(intisa->regfiles[n].shortname, shortname)) {
1367 return n;
1368 }
1369 }
1370
1371 xtisa_errno = xtensa_isa_bad_regfile;
1372 sprintf(xtisa_error_msg, "regfile shortname \"%s\" not recognized",
1373 shortname);
1374 return XTENSA_UNDEFINED;
1375 }
1376
1377
1378 const char *xtensa_regfile_name(xtensa_isa isa, xtensa_regfile rf)
1379 {
1380 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1381
1382 CHECK_REGFILE(intisa, rf, NULL);
1383 return intisa->regfiles[rf].name;
1384 }
1385
1386
1387 const char *xtensa_regfile_shortname(xtensa_isa isa, xtensa_regfile rf)
1388 {
1389 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1390
1391 CHECK_REGFILE(intisa, rf, NULL);
1392 return intisa->regfiles[rf].shortname;
1393 }
1394
1395
1396 xtensa_regfile xtensa_regfile_view_parent(xtensa_isa isa, xtensa_regfile rf)
1397 {
1398 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1399
1400 CHECK_REGFILE(intisa, rf, XTENSA_UNDEFINED);
1401 return intisa->regfiles[rf].parent;
1402 }
1403
1404
1405 int xtensa_regfile_num_bits(xtensa_isa isa, xtensa_regfile rf)
1406 {
1407 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1408
1409 CHECK_REGFILE(intisa, rf, XTENSA_UNDEFINED);
1410 return intisa->regfiles[rf].num_bits;
1411 }
1412
1413
1414 int xtensa_regfile_num_entries(xtensa_isa isa, xtensa_regfile rf)
1415 {
1416 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1417
1418 CHECK_REGFILE(intisa, rf, XTENSA_UNDEFINED);
1419 return intisa->regfiles[rf].num_entries;
1420 }
1421
1422
1423 /* Processor States. */
1424
1425
1426 #define CHECK_STATE(INTISA, ST, ERRVAL) \
1427 do { \
1428 if ((ST) < 0 || (ST) >= (INTISA)->num_states) { \
1429 xtisa_errno = xtensa_isa_bad_state; \
1430 strcpy(xtisa_error_msg, "invalid state specifier"); \
1431 return ERRVAL; \
1432 } \
1433 } while (0)
1434
1435
1436 xtensa_state xtensa_state_lookup(xtensa_isa isa, const char *name)
1437 {
1438 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1439 xtensa_lookup_entry entry, *result = 0;
1440
1441 if (!name || !*name) {
1442 xtisa_errno = xtensa_isa_bad_state;
1443 strcpy(xtisa_error_msg, "invalid state name");
1444 return XTENSA_UNDEFINED;
1445 }
1446
1447 if (intisa->num_states != 0) {
1448 entry.key = name;
1449 result = bsearch(&entry, intisa->state_lookup_table,
1450 intisa->num_states, sizeof(xtensa_lookup_entry),
1451 xtensa_isa_name_compare);
1452 }
1453
1454 if (!result) {
1455 xtisa_errno = xtensa_isa_bad_state;
1456 sprintf(xtisa_error_msg, "state \"%s\" not recognized", name);
1457 return XTENSA_UNDEFINED;
1458 }
1459
1460 return result->u.state;
1461 }
1462
1463
1464 const char *xtensa_state_name(xtensa_isa isa, xtensa_state st)
1465 {
1466 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1467
1468 CHECK_STATE(intisa, st, NULL);
1469 return intisa->states[st].name;
1470 }
1471
1472
1473 int xtensa_state_num_bits(xtensa_isa isa, xtensa_state st)
1474 {
1475 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1476
1477 CHECK_STATE(intisa, st, XTENSA_UNDEFINED);
1478 return intisa->states[st].num_bits;
1479 }
1480
1481
1482 int xtensa_state_is_exported(xtensa_isa isa, xtensa_state st)
1483 {
1484 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1485
1486 CHECK_STATE(intisa, st, XTENSA_UNDEFINED);
1487 if ((intisa->states[st].flags & XTENSA_STATE_IS_EXPORTED) != 0) {
1488 return 1;
1489 }
1490 return 0;
1491 }
1492
1493
1494 int xtensa_state_is_shared_or(xtensa_isa isa, xtensa_state st)
1495 {
1496 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1497
1498 CHECK_STATE(intisa, st, XTENSA_UNDEFINED);
1499 if ((intisa->states[st].flags & XTENSA_STATE_IS_SHARED_OR) != 0) {
1500 return 1;
1501 }
1502 return 0;
1503 }
1504
1505
1506 /* Sysregs. */
1507
1508
1509 #define CHECK_SYSREG(INTISA, SYSREG, ERRVAL) \
1510 do { \
1511 if ((SYSREG) < 0 || (SYSREG) >= (INTISA)->num_sysregs) { \
1512 xtisa_errno = xtensa_isa_bad_sysreg; \
1513 strcpy(xtisa_error_msg, "invalid sysreg specifier"); \
1514 return ERRVAL; \
1515 } \
1516 } while (0)
1517
1518
1519 xtensa_sysreg xtensa_sysreg_lookup(xtensa_isa isa, int num, int is_user)
1520 {
1521 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1522
1523 if (is_user != 0) {
1524 is_user = 1;
1525 }
1526
1527 if (num < 0 || num > intisa->max_sysreg_num[is_user] ||
1528 intisa->sysreg_table[is_user][num] == XTENSA_UNDEFINED) {
1529 xtisa_errno = xtensa_isa_bad_sysreg;
1530 strcpy(xtisa_error_msg, "sysreg not recognized");
1531 return XTENSA_UNDEFINED;
1532 }
1533
1534 return intisa->sysreg_table[is_user][num];
1535 }
1536
1537
1538 xtensa_sysreg xtensa_sysreg_lookup_name(xtensa_isa isa, const char *name)
1539 {
1540 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1541 xtensa_lookup_entry entry, *result = 0;
1542
1543 if (!name || !*name) {
1544 xtisa_errno = xtensa_isa_bad_sysreg;
1545 strcpy(xtisa_error_msg, "invalid sysreg name");
1546 return XTENSA_UNDEFINED;
1547 }
1548
1549 if (intisa->num_sysregs != 0) {
1550 entry.key = name;
1551 result = bsearch(&entry, intisa->sysreg_lookup_table,
1552 intisa->num_sysregs, sizeof(xtensa_lookup_entry),
1553 xtensa_isa_name_compare);
1554 }
1555
1556 if (!result) {
1557 xtisa_errno = xtensa_isa_bad_sysreg;
1558 sprintf(xtisa_error_msg, "sysreg \"%s\" not recognized", name);
1559 return XTENSA_UNDEFINED;
1560 }
1561
1562 return result->u.sysreg;
1563 }
1564
1565
1566 const char *xtensa_sysreg_name(xtensa_isa isa, xtensa_sysreg sysreg)
1567 {
1568 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1569
1570 CHECK_SYSREG(intisa, sysreg, NULL);
1571 return intisa->sysregs[sysreg].name;
1572 }
1573
1574
1575 int xtensa_sysreg_number(xtensa_isa isa, xtensa_sysreg sysreg)
1576 {
1577 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1578
1579 CHECK_SYSREG(intisa, sysreg, XTENSA_UNDEFINED);
1580 return intisa->sysregs[sysreg].number;
1581 }
1582
1583
1584 int xtensa_sysreg_is_user(xtensa_isa isa, xtensa_sysreg sysreg)
1585 {
1586 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1587
1588 CHECK_SYSREG(intisa, sysreg, XTENSA_UNDEFINED);
1589 if (intisa->sysregs[sysreg].is_user) {
1590 return 1;
1591 }
1592 return 0;
1593 }
1594
1595
1596 /* Interfaces. */
1597
1598
1599 #define CHECK_INTERFACE(INTISA, INTF, ERRVAL) \
1600 do { \
1601 if ((INTF) < 0 || (INTF) >= (INTISA)->num_interfaces) { \
1602 xtisa_errno = xtensa_isa_bad_interface; \
1603 strcpy(xtisa_error_msg, "invalid interface specifier"); \
1604 return ERRVAL; \
1605 } \
1606 } while (0)
1607
1608
1609 xtensa_interface xtensa_interface_lookup(xtensa_isa isa, const char *ifname)
1610 {
1611 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1612 xtensa_lookup_entry entry, *result = 0;
1613
1614 if (!ifname || !*ifname) {
1615 xtisa_errno = xtensa_isa_bad_interface;
1616 strcpy(xtisa_error_msg, "invalid interface name");
1617 return XTENSA_UNDEFINED;
1618 }
1619
1620 if (intisa->num_interfaces != 0) {
1621 entry.key = ifname;
1622 result = bsearch(&entry, intisa->interface_lookup_table,
1623 intisa->num_interfaces, sizeof(xtensa_lookup_entry),
1624 xtensa_isa_name_compare);
1625 }
1626
1627 if (!result) {
1628 xtisa_errno = xtensa_isa_bad_interface;
1629 sprintf(xtisa_error_msg, "interface \"%s\" not recognized", ifname);
1630 return XTENSA_UNDEFINED;
1631 }
1632
1633 return result->u.intf;
1634 }
1635
1636
1637 const char *xtensa_interface_name(xtensa_isa isa, xtensa_interface intf)
1638 {
1639 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1640
1641 CHECK_INTERFACE(intisa, intf, NULL);
1642 return intisa->interfaces[intf].name;
1643 }
1644
1645
1646 int xtensa_interface_num_bits(xtensa_isa isa, xtensa_interface intf)
1647 {
1648 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1649
1650 CHECK_INTERFACE(intisa, intf, XTENSA_UNDEFINED);
1651 return intisa->interfaces[intf].num_bits;
1652 }
1653
1654
1655 char xtensa_interface_inout(xtensa_isa isa, xtensa_interface intf)
1656 {
1657 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1658
1659 CHECK_INTERFACE(intisa, intf, 0);
1660 return intisa->interfaces[intf].inout;
1661 }
1662
1663
1664 int xtensa_interface_has_side_effect(xtensa_isa isa, xtensa_interface intf)
1665 {
1666 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1667
1668 CHECK_INTERFACE(intisa, intf, XTENSA_UNDEFINED);
1669 if ((intisa->interfaces[intf].flags &
1670 XTENSA_INTERFACE_HAS_SIDE_EFFECT) != 0) {
1671 return 1;
1672 }
1673 return 0;
1674 }
1675
1676
1677 int xtensa_interface_class_id(xtensa_isa isa, xtensa_interface intf)
1678 {
1679 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1680
1681 CHECK_INTERFACE(intisa, intf, XTENSA_UNDEFINED);
1682 return intisa->interfaces[intf].class_id;
1683 }
1684
1685
1686 /* Functional Units. */
1687
1688
1689 #define CHECK_FUNCUNIT(INTISA, FUN, ERRVAL) \
1690 do { \
1691 if ((FUN) < 0 || (FUN) >= (INTISA)->num_funcUnits) { \
1692 xtisa_errno = xtensa_isa_bad_funcUnit; \
1693 strcpy(xtisa_error_msg, "invalid functional unit specifier"); \
1694 return ERRVAL; \
1695 } \
1696 } while (0)
1697
1698
1699 xtensa_funcUnit xtensa_funcUnit_lookup(xtensa_isa isa, const char *fname)
1700 {
1701 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1702 xtensa_lookup_entry entry, *result = 0;
1703
1704 if (!fname || !*fname) {
1705 xtisa_errno = xtensa_isa_bad_funcUnit;
1706 strcpy(xtisa_error_msg, "invalid functional unit name");
1707 return XTENSA_UNDEFINED;
1708 }
1709
1710 if (intisa->num_funcUnits != 0) {
1711 entry.key = fname;
1712 result = bsearch(&entry, intisa->funcUnit_lookup_table,
1713 intisa->num_funcUnits, sizeof(xtensa_lookup_entry),
1714 xtensa_isa_name_compare);
1715 }
1716
1717 if (!result) {
1718 xtisa_errno = xtensa_isa_bad_funcUnit;
1719 sprintf(xtisa_error_msg,
1720 "functional unit \"%s\" not recognized", fname);
1721 return XTENSA_UNDEFINED;
1722 }
1723
1724 return result->u.fun;
1725 }
1726
1727
1728 const char *xtensa_funcUnit_name(xtensa_isa isa, xtensa_funcUnit fun)
1729 {
1730 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1731
1732 CHECK_FUNCUNIT(intisa, fun, NULL);
1733 return intisa->funcUnits[fun].name;
1734 }
1735
1736
1737 int xtensa_funcUnit_num_copies(xtensa_isa isa, xtensa_funcUnit fun)
1738 {
1739 xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
1740
1741 CHECK_FUNCUNIT(intisa, fun, XTENSA_UNDEFINED);
1742 return intisa->funcUnits[fun].num_copies;
1743 }