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40b36596 JM |
1 | /* TI C6X disassembler. |
2 | Copyright 2010 | |
3 | Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of libopcodes. | |
6 | ||
7 | This library is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | It is distributed in the hope that it will be useful, but WITHOUT | |
13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
15 | License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, | |
20 | MA 02110-1301, USA. */ | |
21 | ||
22 | #include "sysdep.h" | |
23 | #include "dis-asm.h" | |
24 | #include "opcode/tic6x.h" | |
25 | #include "libiberty.h" | |
26 | ||
27 | /* Define the instruction format table. */ | |
28 | const tic6x_insn_format tic6x_insn_format_table[tic6x_insn_format_max] = | |
29 | { | |
30 | #define FMT(name, num_bits, cst_bits, mask, fields) \ | |
31 | { num_bits, cst_bits, mask, fields }, | |
32 | #include "opcode/tic6x-insn-formats.h" | |
33 | #undef FMT | |
34 | }; | |
35 | ||
36 | /* Define the control register table. */ | |
37 | const tic6x_ctrl tic6x_ctrl_table[tic6x_ctrl_max] = | |
38 | { | |
39 | #define CTRL(name, isa, rw, crlo, crhi_mask) \ | |
40 | { \ | |
41 | STRINGX(name), \ | |
42 | CONCAT2(TIC6X_INSN_,isa), \ | |
43 | CONCAT2(tic6x_rw_,rw), \ | |
44 | crlo, \ | |
45 | crhi_mask \ | |
46 | }, | |
47 | #include "opcode/tic6x-control-registers.h" | |
48 | #undef CTRL | |
49 | }; | |
50 | ||
51 | /* Define the opcode table. */ | |
52 | const tic6x_opcode tic6x_opcode_table[tic6x_opcode_max] = | |
53 | { | |
54 | #define INSN(name, func_unit, format, type, isa, flags, fixed, ops, var) \ | |
55 | { \ | |
56 | STRINGX(name), \ | |
57 | CONCAT2(tic6x_func_unit_,func_unit), \ | |
58 | CONCAT4(tic6x_insn_format_,func_unit,_,format), \ | |
59 | CONCAT2(tic6x_pipeline_,type), \ | |
60 | CONCAT2(TIC6X_INSN_,isa), \ | |
61 | flags, \ | |
62 | fixed, \ | |
63 | ops, \ | |
64 | var \ | |
65 | }, | |
66 | #define INSNE(name, e, func_unit, format, type, isa, flags, fixed, ops, var) \ | |
67 | { \ | |
68 | STRINGX(name), \ | |
69 | CONCAT2(tic6x_func_unit_,func_unit), \ | |
70 | CONCAT4(tic6x_insn_format_,func_unit,_,format), \ | |
71 | CONCAT2(tic6x_pipeline_,type), \ | |
72 | CONCAT2(TIC6X_INSN_,isa), \ | |
73 | flags, \ | |
74 | fixed, \ | |
75 | ops, \ | |
76 | var \ | |
77 | }, | |
78 | #include "opcode/tic6x-opcode-table.h" | |
79 | #undef INSN | |
80 | #undef INSNE | |
81 | }; | |
82 | ||
83 | /* If instruction format FMT has a field FIELD, return a pointer to | |
84 | the description of that field; otherwise return NULL. */ | |
85 | ||
86 | const tic6x_insn_field * | |
87 | tic6x_field_from_fmt (const tic6x_insn_format *fmt, tic6x_insn_field_id field) | |
88 | { | |
89 | unsigned int f; | |
90 | ||
91 | for (f = 0; f < fmt->num_fields; f++) | |
92 | if (fmt->fields[f].field_id == field) | |
93 | return &fmt->fields[f]; | |
94 | ||
95 | return NULL; | |
96 | } | |
97 | ||
98 | /* Extract the bits corresponding to FIELD from OPCODE. */ | |
99 | ||
100 | static unsigned int | |
101 | tic6x_field_bits (unsigned int opcode, const tic6x_insn_field *field) | |
102 | { | |
103 | return (opcode >> field->low_pos) & ((1u << field->width) - 1); | |
104 | } | |
105 | ||
106 | /* Extract a 32-bit value read from the instruction stream. */ | |
107 | ||
108 | static unsigned int | |
109 | tic6x_extract_32 (unsigned char *p, struct disassemble_info *info) | |
110 | { | |
111 | if (info->endian == BFD_ENDIAN_LITTLE) | |
112 | return (p[0]) | (p[1] << 8) | (p[2] << 16) | (p[3] << 24); | |
113 | else | |
114 | return (p[3]) | (p[2] << 8) | (p[1] << 16) | (p[0] << 24); | |
115 | } | |
116 | ||
117 | /* Extract a 16-bit value read from the instruction stream. */ | |
118 | ||
119 | static unsigned int | |
120 | tic6x_extract_16 (unsigned char *p, struct disassemble_info *info) | |
121 | { | |
122 | if (info->endian == BFD_ENDIAN_LITTLE) | |
123 | return (p[0]) | (p[1] << 8); | |
124 | else | |
125 | return (p[1]) | (p[0] << 8); | |
126 | } | |
127 | ||
128 | /* FP points to a fetch packet. Return whether it is header-based; if | |
129 | it is, fill in HEADER. */ | |
130 | ||
131 | static bfd_boolean | |
132 | tic6x_check_fetch_packet_header (unsigned char *fp, | |
133 | tic6x_fetch_packet_header *header, | |
134 | struct disassemble_info *info) | |
135 | { | |
136 | int i; | |
137 | ||
138 | header->header = tic6x_extract_32 (fp + 28, info); | |
139 | if ((header->header & 0xf0000000) != 0xe0000000) | |
140 | return FALSE; | |
141 | ||
142 | for (i = 0; i < 7; i++) | |
143 | header->word_compact[i] | |
144 | = (header->header & (1u << (21 + i))) ? TRUE : FALSE; | |
145 | ||
146 | header->prot = (header->header & (1u << 20)) ? TRUE : FALSE; | |
147 | header->rs = (header->header & (1u << 19)) ? TRUE : FALSE; | |
148 | header->dsz = (header->header >> 16) & 0x7; | |
149 | header->br = (header->header & (1u << 15)) ? TRUE : FALSE; | |
150 | header->sat = (header->header & (1u << 14)) ? TRUE : FALSE; | |
151 | ||
152 | for (i = 0; i < 14; i++) | |
153 | header->p_bits[i] | |
154 | = (header->header & (1u << i)) ? TRUE : FALSE; | |
155 | ||
156 | return TRUE; | |
157 | } | |
158 | ||
159 | /* Disassemble the instruction at ADDR and print it using | |
160 | INFO->FPRINTF_FUNC and INFO->STREAM, returning the number of bytes | |
161 | consumed. */ | |
162 | ||
163 | int | |
164 | print_insn_tic6x (bfd_vma addr, struct disassemble_info *info) | |
165 | { | |
166 | int status; | |
167 | bfd_vma fp_addr; | |
168 | bfd_vma fp_offset; | |
169 | unsigned char fp[32]; | |
170 | unsigned int opcode; | |
171 | tic6x_opcode_id opcode_id; | |
172 | bfd_boolean fetch_packet_header_based; | |
173 | tic6x_fetch_packet_header header; | |
174 | unsigned int num_bits; | |
175 | bfd_boolean bad_offset = FALSE; | |
176 | ||
177 | fp_offset = addr & 0x1f; | |
178 | fp_addr = addr - fp_offset; | |
179 | status = info->read_memory_func (fp_addr, fp, 32, info); | |
180 | if (status) | |
181 | { | |
182 | info->memory_error_func (status, addr, info); | |
183 | return -1; | |
184 | } | |
185 | ||
186 | fetch_packet_header_based | |
187 | = tic6x_check_fetch_packet_header (fp, &header, info); | |
188 | if (fetch_packet_header_based) | |
189 | { | |
190 | if (fp_offset & 0x1) | |
191 | bad_offset = TRUE; | |
192 | if ((fp_offset & 0x3) && (fp_offset >= 28 | |
193 | || !header.word_compact[fp_offset >> 2])) | |
194 | bad_offset = TRUE; | |
195 | if (fp_offset == 28) | |
196 | { | |
197 | info->bytes_per_chunk = 4; | |
198 | info->fprintf_func (info->stream, "<fetch packet header 0x%.8x>", | |
199 | header.header); | |
200 | return 4; | |
201 | } | |
202 | num_bits = (header.word_compact[fp_offset >> 2] ? 16 : 32); | |
203 | } | |
204 | else | |
205 | { | |
206 | num_bits = 32; | |
207 | if (fp_offset & 0x3) | |
208 | bad_offset = TRUE; | |
209 | } | |
210 | ||
211 | if (bad_offset) | |
212 | { | |
213 | info->bytes_per_chunk = 1; | |
214 | info->fprintf_func (info->stream, ".byte 0x%.2x", fp[fp_offset]); | |
215 | return 1; | |
216 | } | |
217 | ||
218 | if (num_bits == 16) | |
219 | { | |
220 | /* The least-significant part of a 32-bit word comes logically | |
221 | before the most-significant part. For big-endian, follow the | |
222 | TI assembler in showing instructions in logical order by | |
223 | pretending that the two halves of the word are in opposite | |
224 | locations to where they actually are. */ | |
225 | if (info->endian == BFD_ENDIAN_LITTLE) | |
226 | opcode = tic6x_extract_16 (fp + fp_offset, info); | |
227 | else | |
228 | opcode = tic6x_extract_16 (fp + (fp_offset ^ 2), info); | |
229 | } | |
230 | else | |
231 | opcode = tic6x_extract_32 (fp + fp_offset, info); | |
232 | ||
233 | for (opcode_id = 0; opcode_id < tic6x_opcode_max; opcode_id++) | |
234 | { | |
235 | const tic6x_opcode *const opc = &tic6x_opcode_table[opcode_id]; | |
236 | const tic6x_insn_format *const fmt | |
237 | = &tic6x_insn_format_table[opc->format]; | |
238 | const tic6x_insn_field *creg_field; | |
239 | bfd_boolean p_bit; | |
240 | const char *parallel; | |
241 | const char *cond = ""; | |
242 | const char *func_unit; | |
243 | char func_unit_buf[7]; | |
244 | unsigned int func_unit_side = 0; | |
245 | unsigned int func_unit_data_side = 0; | |
246 | unsigned int func_unit_cross = 0; | |
247 | /* The maximum length of the text of a non-PC-relative operand | |
248 | is 24 bytes (SPMASK masking all eight functional units, with | |
249 | separating commas and trailing NUL). */ | |
250 | char operands[TIC6X_MAX_OPERANDS][24] = { { 0 } }; | |
251 | bfd_vma operands_addresses[TIC6X_MAX_OPERANDS] = { 0 }; | |
252 | bfd_boolean operands_text[TIC6X_MAX_OPERANDS] = { FALSE }; | |
253 | bfd_boolean operands_pcrel[TIC6X_MAX_OPERANDS] = { FALSE }; | |
254 | unsigned int fix; | |
255 | unsigned int num_operands; | |
256 | unsigned int op_num; | |
257 | bfd_boolean fixed_ok; | |
258 | bfd_boolean operands_ok; | |
259 | ||
260 | if (opc->flags & TIC6X_FLAG_MACRO) | |
261 | continue; | |
262 | if (fmt->num_bits != num_bits) | |
263 | continue; | |
264 | if ((opcode & fmt->mask) != fmt->cst_bits) | |
265 | continue; | |
266 | ||
267 | /* If the format has a creg field, it is only a candidate for a | |
268 | match if the creg and z fields have values indicating a valid | |
269 | condition; reserved values indicate either an instruction | |
270 | format without a creg field, or an invalid instruction. */ | |
271 | creg_field = tic6x_field_from_fmt (fmt, tic6x_field_creg); | |
272 | if (creg_field) | |
273 | { | |
274 | const tic6x_insn_field *z_field; | |
275 | unsigned int creg_value, z_value; | |
276 | static const char *const conds[8][2] = | |
277 | { | |
278 | { "", NULL }, | |
279 | { "[b0] ", "[!b0] " }, | |
280 | { "[b1] ", "[!b1] " }, | |
281 | { "[b2] ", "[!b2] " }, | |
282 | { "[a1] ", "[!a1] " }, | |
283 | { "[a2] ", "[!a2] " }, | |
284 | { "[a0] ", "[!a0] " }, | |
285 | { NULL, NULL } | |
286 | }; | |
287 | ||
288 | /* A creg field is not meaningful without a z field, so if | |
289 | the z field is not present this is an error in the format | |
290 | table. */ | |
291 | z_field = tic6x_field_from_fmt (fmt, tic6x_field_z); | |
292 | if (!z_field) | |
293 | abort (); | |
294 | ||
295 | creg_value = tic6x_field_bits (opcode, creg_field); | |
296 | z_value = tic6x_field_bits (opcode, z_field); | |
297 | cond = conds[creg_value][z_value]; | |
298 | if (cond == NULL) | |
299 | continue; | |
300 | } | |
301 | ||
302 | /* All fixed fields must have matching values; all fields with | |
303 | restricted ranges must have values within those ranges. */ | |
304 | fixed_ok = TRUE; | |
305 | for (fix = 0; fix < opc->num_fixed_fields; fix++) | |
306 | { | |
307 | unsigned int field_bits; | |
308 | const tic6x_insn_field *const field | |
309 | = tic6x_field_from_fmt (fmt, opc->fixed_fields[fix].field_id); | |
310 | ||
311 | if (!field) | |
312 | abort (); | |
313 | field_bits = tic6x_field_bits (opcode, field); | |
314 | if (field_bits < opc->fixed_fields[fix].min_val | |
315 | || field_bits > opc->fixed_fields[fix].max_val) | |
316 | { | |
317 | fixed_ok = FALSE; | |
318 | break; | |
319 | } | |
320 | } | |
321 | if (!fixed_ok) | |
322 | continue; | |
323 | ||
324 | /* The instruction matches. */ | |
325 | ||
326 | /* The p-bit indicates whether this instruction is in parallel | |
327 | with the *next* instruction, whereas the parallel bars | |
328 | indicate the instruction is in parallel with the *previous* | |
329 | instruction. Thus, we must find the p-bit for the previous | |
330 | instruction. */ | |
331 | if (num_bits == 16 && (fp_offset & 0x2) == 2) | |
332 | { | |
333 | /* This is the logically second (most significant; second in | |
334 | fp_offset terms because fp_offset relates to logical not | |
335 | physical addresses) instruction of a compact pair; find | |
336 | the p-bit for the first (least significant). */ | |
337 | p_bit = header.p_bits[(fp_offset >> 2) << 1]; | |
338 | } | |
339 | else if (fp_offset >= 4) | |
340 | { | |
341 | /* Find the last instruction of the previous word in this | |
342 | fetch packet. For compact instructions, this is the most | |
343 | significant 16 bits. */ | |
344 | if (fetch_packet_header_based | |
345 | && header.word_compact[(fp_offset >> 2) - 1]) | |
346 | p_bit = header.p_bits[(fp_offset >> 1) - 1]; | |
347 | else | |
348 | { | |
349 | unsigned int prev_opcode | |
350 | = tic6x_extract_32 (fp + (fp_offset & 0x1c) - 4, info); | |
351 | p_bit = (prev_opcode & 0x1) ? TRUE : FALSE; | |
352 | } | |
353 | } | |
354 | else | |
355 | { | |
356 | /* Find the last instruction of the previous fetch | |
357 | packet. */ | |
358 | unsigned char fp_prev[32]; | |
359 | status = info->read_memory_func (fp_addr - 32, fp_prev, 32, info); | |
360 | if (status) | |
361 | /* No previous instruction to be parallel with. */ | |
362 | p_bit = FALSE; | |
363 | else | |
364 | { | |
365 | bfd_boolean prev_header_based; | |
366 | tic6x_fetch_packet_header prev_header; | |
367 | ||
368 | prev_header_based | |
369 | = tic6x_check_fetch_packet_header (fp_prev, &prev_header, info); | |
370 | if (prev_header_based && prev_header.word_compact[6]) | |
371 | p_bit = prev_header.p_bits[13]; | |
372 | else | |
373 | { | |
374 | unsigned int prev_opcode = tic6x_extract_32 (fp_prev + 28, | |
375 | info); | |
376 | p_bit = (prev_opcode & 0x1) ? TRUE : FALSE; | |
377 | } | |
378 | } | |
379 | } | |
380 | parallel = p_bit ? "|| " : ""; | |
381 | ||
382 | if (opc->func_unit == tic6x_func_unit_nfu) | |
383 | func_unit = ""; | |
384 | else | |
385 | { | |
386 | unsigned int fld_num; | |
387 | char func_unit_char; | |
388 | const char *data_str; | |
389 | bfd_boolean have_areg = FALSE; | |
390 | bfd_boolean have_cross = FALSE; | |
391 | ||
392 | func_unit_side = (opc->flags & TIC6X_FLAG_SIDE_B_ONLY) ? 2 : 0; | |
393 | func_unit_cross = 0; | |
394 | func_unit_data_side = (opc->flags & TIC6X_FLAG_SIDE_T2_ONLY) ? 2 : 0; | |
395 | ||
396 | for (fld_num = 0; fld_num < opc->num_variable_fields; fld_num++) | |
397 | { | |
398 | const tic6x_coding_field *const enc = &opc->variable_fields[fld_num]; | |
399 | const tic6x_insn_field *field; | |
400 | unsigned int fld_val; | |
401 | ||
402 | field = tic6x_field_from_fmt (fmt, enc->field_id); | |
403 | if (!field) | |
404 | abort (); | |
405 | fld_val = tic6x_field_bits (opcode, field); | |
406 | switch (enc->coding_method) | |
407 | { | |
408 | case tic6x_coding_fu: | |
409 | /* The side must be specified exactly once. */ | |
410 | if (func_unit_side) | |
411 | abort (); | |
412 | func_unit_side = (fld_val ? 2 : 1); | |
413 | break; | |
414 | ||
415 | case tic6x_coding_data_fu: | |
416 | /* The data side must be specified exactly once. */ | |
417 | if (func_unit_data_side) | |
418 | abort (); | |
419 | func_unit_data_side = (fld_val ? 2 : 1); | |
420 | break; | |
421 | ||
422 | case tic6x_coding_xpath: | |
423 | /* Cross path use must be specified exactly | |
424 | once. */ | |
425 | if (have_cross) | |
426 | abort (); | |
427 | have_cross = TRUE; | |
428 | func_unit_cross = fld_val; | |
429 | break; | |
430 | ||
431 | case tic6x_coding_areg: | |
432 | have_areg = TRUE; | |
433 | break; | |
434 | ||
435 | default: | |
436 | /* Don't relate to functional units. */ | |
437 | break; | |
438 | } | |
439 | } | |
440 | ||
441 | /* The side of the functional unit used must now have been | |
442 | determined either from the flags or from an instruction | |
443 | field. */ | |
444 | if (func_unit_side != 1 && func_unit_side != 2) | |
445 | abort (); | |
446 | ||
447 | /* Cross paths are not applicable when sides are specified | |
448 | for both address and data paths. */ | |
449 | if (func_unit_data_side && have_cross) | |
450 | abort (); | |
451 | ||
452 | /* Separate address and data paths are only applicable for | |
453 | the D unit. */ | |
454 | if (func_unit_data_side && opc->func_unit != tic6x_func_unit_d) | |
455 | abort (); | |
456 | ||
457 | /* If an address register is being used but in ADDA rather | |
458 | than a load or store, it uses a cross path for side-A | |
459 | instructions, and the cross path use is not specified by | |
460 | an instruction field. */ | |
461 | if (have_areg && !func_unit_data_side) | |
462 | { | |
463 | if (have_cross) | |
464 | abort (); | |
465 | func_unit_cross = (func_unit_side == 1 ? TRUE : FALSE); | |
466 | } | |
467 | ||
468 | switch (opc->func_unit) | |
469 | { | |
470 | case tic6x_func_unit_d: | |
471 | func_unit_char = 'D'; | |
472 | break; | |
473 | ||
474 | case tic6x_func_unit_l: | |
475 | func_unit_char = 'L'; | |
476 | break; | |
477 | ||
478 | case tic6x_func_unit_m: | |
479 | func_unit_char = 'M'; | |
480 | break; | |
481 | ||
482 | case tic6x_func_unit_s: | |
483 | func_unit_char = 'S'; | |
484 | break; | |
485 | ||
486 | default: | |
487 | abort (); | |
488 | } | |
489 | ||
490 | switch (func_unit_data_side) | |
491 | { | |
492 | case 0: | |
493 | data_str = ""; | |
494 | break; | |
495 | ||
496 | case 1: | |
497 | data_str = "T1"; | |
498 | break; | |
499 | ||
500 | case 2: | |
501 | data_str = "T2"; | |
502 | break; | |
503 | ||
504 | default: | |
505 | abort (); | |
506 | } | |
507 | ||
508 | snprintf (func_unit_buf, 7, " .%c%u%s%s", func_unit_char, | |
509 | func_unit_side, (func_unit_cross ? "X" : ""), data_str); | |
510 | func_unit = func_unit_buf; | |
511 | } | |
512 | ||
513 | /* For each operand there must be one or more fields set based | |
514 | on that operand, that can together be used to derive the | |
515 | operand value. */ | |
516 | operands_ok = TRUE; | |
517 | num_operands = opc->num_operands; | |
518 | for (op_num = 0; op_num < num_operands; op_num++) | |
519 | { | |
520 | unsigned int fld_num; | |
521 | unsigned int mem_base_reg = 0; | |
522 | bfd_boolean mem_base_reg_known = FALSE; | |
523 | bfd_boolean mem_base_reg_known_long = FALSE; | |
524 | unsigned int mem_offset = 0; | |
525 | bfd_boolean mem_offset_known = FALSE; | |
526 | bfd_boolean mem_offset_known_long = FALSE; | |
527 | unsigned int mem_mode = 0; | |
528 | bfd_boolean mem_mode_known = FALSE; | |
529 | unsigned int mem_scaled = 0; | |
530 | bfd_boolean mem_scaled_known = FALSE; | |
531 | unsigned int crlo = 0; | |
532 | bfd_boolean crlo_known = FALSE; | |
533 | unsigned int crhi = 0; | |
534 | bfd_boolean crhi_known = FALSE; | |
535 | bfd_boolean spmask_skip_operand = FALSE; | |
536 | unsigned int fcyc_bits = 0; | |
537 | bfd_boolean prev_sploop_found = FALSE; | |
538 | ||
539 | switch (opc->operand_info[op_num].form) | |
540 | { | |
541 | case tic6x_operand_retreg: | |
542 | /* Fully determined by the functional unit. */ | |
543 | operands_text[op_num] = TRUE; | |
544 | snprintf (operands[op_num], 24, "%c3", | |
545 | (func_unit_side == 2 ? 'b' : 'a')); | |
546 | continue; | |
547 | ||
548 | case tic6x_operand_irp: | |
549 | operands_text[op_num] = TRUE; | |
550 | snprintf (operands[op_num], 24, "irp"); | |
551 | continue; | |
552 | ||
553 | case tic6x_operand_nrp: | |
554 | operands_text[op_num] = TRUE; | |
555 | snprintf (operands[op_num], 24, "nrp"); | |
556 | continue; | |
557 | ||
558 | default: | |
559 | break; | |
560 | } | |
561 | ||
562 | for (fld_num = 0; fld_num < opc->num_variable_fields; fld_num++) | |
563 | { | |
564 | const tic6x_coding_field *const enc | |
565 | = &opc->variable_fields[fld_num]; | |
566 | const tic6x_insn_field *field; | |
567 | unsigned int fld_val; | |
568 | signed int signed_fld_val; | |
569 | ||
570 | if (enc->operand_num != op_num) | |
571 | continue; | |
572 | field = tic6x_field_from_fmt (fmt, enc->field_id); | |
573 | if (!field) | |
574 | abort (); | |
575 | fld_val = tic6x_field_bits (opcode, field); | |
576 | switch (enc->coding_method) | |
577 | { | |
578 | case tic6x_coding_ucst: | |
579 | case tic6x_coding_ulcst_dpr_byte: | |
580 | case tic6x_coding_ulcst_dpr_half: | |
581 | case tic6x_coding_ulcst_dpr_word: | |
582 | case tic6x_coding_lcst_low16: | |
583 | switch (opc->operand_info[op_num].form) | |
584 | { | |
585 | case tic6x_operand_asm_const: | |
586 | case tic6x_operand_link_const: | |
587 | operands_text[op_num] = TRUE; | |
588 | snprintf (operands[op_num], 24, "%u", fld_val); | |
589 | break; | |
590 | ||
591 | case tic6x_operand_mem_long: | |
592 | mem_offset = fld_val; | |
593 | mem_offset_known_long = TRUE; | |
594 | break; | |
595 | ||
596 | default: | |
597 | abort (); | |
598 | } | |
599 | break; | |
600 | ||
601 | case tic6x_coding_lcst_high16: | |
602 | operands_text[op_num] = TRUE; | |
603 | snprintf (operands[op_num], 24, "%u", fld_val << 16); | |
604 | break; | |
605 | ||
606 | case tic6x_coding_scst: | |
607 | operands_text[op_num] = TRUE; | |
608 | signed_fld_val = (signed int) fld_val; | |
609 | signed_fld_val ^= (1 << (field->width - 1)); | |
610 | signed_fld_val -= (1 << (field->width - 1)); | |
611 | snprintf (operands[op_num], 24, "%d", signed_fld_val); | |
612 | break; | |
613 | ||
614 | case tic6x_coding_ucst_minus_one: | |
615 | operands_text[op_num] = TRUE; | |
616 | snprintf (operands[op_num], 24, "%u", fld_val + 1); | |
617 | break; | |
618 | ||
619 | case tic6x_coding_pcrel: | |
620 | case tic6x_coding_pcrel_half: | |
621 | signed_fld_val = (signed int) fld_val; | |
622 | signed_fld_val ^= (1 << (field->width - 1)); | |
623 | signed_fld_val -= (1 << (field->width - 1)); | |
624 | if (fetch_packet_header_based | |
625 | && enc->coding_method == tic6x_coding_pcrel_half) | |
626 | signed_fld_val *= 2; | |
627 | else | |
628 | signed_fld_val *= 4; | |
629 | operands_pcrel[op_num] = TRUE; | |
630 | operands_addresses[op_num] = fp_addr + signed_fld_val; | |
631 | break; | |
632 | ||
633 | case tic6x_coding_reg_shift: | |
634 | fld_val <<= 1; | |
635 | /* Fall through. */ | |
636 | case tic6x_coding_reg: | |
637 | switch (opc->operand_info[op_num].form) | |
638 | { | |
639 | case tic6x_operand_reg: | |
640 | operands_text[op_num] = TRUE; | |
641 | snprintf (operands[op_num], 24, "%c%u", | |
642 | (func_unit_side == 2 ? 'b' : 'a'), fld_val); | |
643 | break; | |
644 | ||
645 | case tic6x_operand_xreg: | |
646 | operands_text[op_num] = TRUE; | |
647 | snprintf (operands[op_num], 24, "%c%u", | |
648 | (((func_unit_side == 2) ^ func_unit_cross) | |
649 | ? 'b' | |
650 | : 'a'), fld_val); | |
651 | break; | |
652 | ||
653 | case tic6x_operand_dreg: | |
654 | operands_text[op_num] = TRUE; | |
655 | snprintf (operands[op_num], 24, "%c%u", | |
656 | (func_unit_data_side == 2 ? 'b' : 'a'), | |
657 | fld_val); | |
658 | break; | |
659 | ||
660 | case tic6x_operand_regpair: | |
661 | operands_text[op_num] = TRUE; | |
662 | if (fld_val & 1) | |
663 | operands_ok = FALSE; | |
664 | snprintf (operands[op_num], 24, "%c%u:%c%u", | |
665 | (func_unit_side == 2 ? 'b' : 'a'), fld_val + 1, | |
666 | (func_unit_side == 2 ? 'b' : 'a'), fld_val); | |
667 | break; | |
668 | ||
669 | case tic6x_operand_xregpair: | |
670 | operands_text[op_num] = TRUE; | |
671 | if (fld_val & 1) | |
672 | operands_ok = FALSE; | |
673 | snprintf (operands[op_num], 24, "%c%u:%c%u", | |
674 | (((func_unit_side == 2) ^ func_unit_cross) | |
675 | ? 'b' | |
676 | : 'a'), fld_val + 1, | |
677 | (((func_unit_side == 2) ^ func_unit_cross) | |
678 | ? 'b' | |
679 | : 'a'), fld_val); | |
680 | break; | |
681 | ||
682 | case tic6x_operand_dregpair: | |
683 | operands_text[op_num] = TRUE; | |
684 | if (fld_val & 1) | |
685 | operands_ok = FALSE; | |
686 | snprintf (operands[op_num], 24, "%c%u:%c%u", | |
687 | (func_unit_data_side == 2 ? 'b' : 'a'), | |
688 | fld_val + 1, | |
689 | (func_unit_data_side == 2 ? 'b' : 'a'), | |
690 | fld_val); | |
691 | break; | |
692 | ||
693 | case tic6x_operand_mem_deref: | |
694 | operands_text[op_num] = TRUE; | |
695 | snprintf (operands[op_num], 24, "*%c%u", | |
696 | (func_unit_side == 2 ? 'b' : 'a'), fld_val); | |
697 | break; | |
698 | ||
699 | case tic6x_operand_mem_short: | |
700 | case tic6x_operand_mem_ndw: | |
701 | mem_base_reg = fld_val; | |
702 | mem_base_reg_known = TRUE; | |
703 | break; | |
704 | ||
705 | default: | |
706 | abort (); | |
707 | } | |
708 | break; | |
709 | ||
710 | case tic6x_coding_areg: | |
711 | switch (opc->operand_info[op_num].form) | |
712 | { | |
713 | case tic6x_operand_areg: | |
714 | operands_text[op_num] = TRUE; | |
715 | snprintf (operands[op_num], 24, "b%u", | |
716 | fld_val ? 15u : 14u); | |
717 | break; | |
718 | ||
719 | case tic6x_operand_mem_long: | |
720 | mem_base_reg = fld_val ? 15u : 14u; | |
721 | mem_base_reg_known_long = TRUE; | |
722 | break; | |
723 | ||
724 | default: | |
725 | abort (); | |
726 | } | |
727 | break; | |
728 | ||
729 | case tic6x_coding_mem_offset: | |
730 | case tic6x_coding_mem_offset_noscale: | |
731 | mem_offset = fld_val; | |
732 | mem_offset_known = TRUE; | |
733 | break; | |
734 | ||
735 | case tic6x_coding_mem_mode: | |
736 | mem_mode = fld_val; | |
737 | mem_mode_known = TRUE; | |
738 | break; | |
739 | ||
740 | case tic6x_coding_scaled: | |
741 | mem_scaled = fld_val; | |
742 | mem_scaled_known = TRUE; | |
743 | break; | |
744 | ||
745 | case tic6x_coding_crlo: | |
746 | crlo = fld_val; | |
747 | crlo_known = TRUE; | |
748 | break; | |
749 | ||
750 | case tic6x_coding_crhi: | |
751 | crhi = fld_val; | |
752 | crhi_known = TRUE; | |
753 | break; | |
754 | ||
755 | case tic6x_coding_fstg: | |
756 | case tic6x_coding_fcyc: | |
757 | if (!prev_sploop_found) | |
758 | { | |
759 | bfd_vma search_fp_addr = fp_addr; | |
760 | bfd_vma search_fp_offset = fp_offset; | |
761 | bfd_boolean search_fp_header_based | |
762 | = fetch_packet_header_based; | |
763 | tic6x_fetch_packet_header search_fp_header = header; | |
764 | unsigned char search_fp[32]; | |
765 | unsigned int search_num_bits; | |
766 | unsigned int search_opcode; | |
767 | unsigned int sploop_ii = 0; | |
768 | int i; | |
769 | ||
770 | memcpy (search_fp, fp, 32); | |
771 | ||
772 | /* To interpret these bits in an SPKERNEL | |
773 | instruction, we must find the previous | |
774 | SPLOOP-family instruction. It may come up to | |
775 | 48 execute packets earlier. */ | |
776 | for (i = 0; i < 48 * 8; i++) | |
777 | { | |
778 | /* Find the previous instruction. */ | |
779 | if (search_fp_offset & 2) | |
780 | search_fp_offset -= 2; | |
781 | else if (search_fp_offset >= 4) | |
782 | { | |
783 | if (search_fp_header_based | |
784 | && (search_fp_header.word_compact | |
785 | [(search_fp_offset >> 2) - 1])) | |
786 | search_fp_offset -= 2; | |
787 | else | |
788 | search_fp_offset -= 4; | |
789 | } | |
790 | else | |
791 | { | |
792 | search_fp_addr -= 32; | |
793 | status = info->read_memory_func (search_fp_addr, | |
794 | search_fp, | |
795 | 32, info); | |
796 | if (status) | |
797 | /* No previous SPLOOP instruction. */ | |
798 | break; | |
799 | search_fp_header_based | |
800 | = (tic6x_check_fetch_packet_header | |
801 | (search_fp, &search_fp_header, info)); | |
802 | if (search_fp_header_based) | |
803 | search_fp_offset | |
804 | = search_fp_header.word_compact[6] ? 26 : 24; | |
805 | else | |
806 | search_fp_offset = 28; | |
807 | } | |
808 | ||
809 | /* Extract the previous instruction. */ | |
810 | if (search_fp_header_based) | |
811 | search_num_bits | |
812 | = (search_fp_header.word_compact[search_fp_offset | |
813 | >> 2] | |
814 | ? 16 | |
815 | : 32); | |
816 | else | |
817 | search_num_bits = 32; | |
818 | if (search_num_bits == 16) | |
819 | { | |
820 | if (info->endian == BFD_ENDIAN_LITTLE) | |
821 | search_opcode | |
822 | = (tic6x_extract_16 | |
823 | (search_fp + search_fp_offset, info)); | |
824 | else | |
825 | search_opcode | |
826 | = (tic6x_extract_16 | |
827 | (search_fp + (search_fp_offset ^ 2), | |
828 | info)); | |
829 | } | |
830 | else | |
831 | search_opcode | |
832 | = tic6x_extract_32 (search_fp + search_fp_offset, | |
833 | info); | |
834 | ||
835 | /* Check whether it is an SPLOOP-family | |
836 | instruction. */ | |
837 | if (search_num_bits == 32 | |
838 | && ((search_opcode & 0x003ffffe) == 0x00038000 | |
839 | || (search_opcode & 0x003ffffe) == 0x0003a000 | |
840 | || ((search_opcode & 0x003ffffe) | |
841 | == 0x0003e000))) | |
842 | { | |
843 | prev_sploop_found = TRUE; | |
844 | sploop_ii = ((search_opcode >> 23) & 0x1f) + 1; | |
845 | } | |
846 | else if (search_num_bits == 16 | |
847 | && (search_opcode & 0x3c7e) == 0x0c66) | |
848 | { | |
849 | prev_sploop_found = TRUE; | |
850 | sploop_ii | |
851 | = (((search_opcode >> 7) & 0x7) | |
852 | | ((search_opcode >> 11) & 0x8)) + 1; | |
853 | } | |
854 | if (prev_sploop_found) | |
855 | { | |
856 | if (sploop_ii <= 0) | |
857 | abort (); | |
858 | else if (sploop_ii <= 1) | |
859 | fcyc_bits = 0; | |
860 | else if (sploop_ii <= 2) | |
861 | fcyc_bits = 1; | |
862 | else if (sploop_ii <= 4) | |
863 | fcyc_bits = 2; | |
864 | else if (sploop_ii <= 8) | |
865 | fcyc_bits = 3; | |
866 | else if (sploop_ii <= 14) | |
867 | fcyc_bits = 4; | |
868 | else | |
869 | prev_sploop_found = FALSE; | |
870 | } | |
871 | if (prev_sploop_found) | |
872 | break; | |
873 | } | |
874 | } | |
875 | if (!prev_sploop_found) | |
876 | { | |
877 | operands_ok = FALSE; | |
878 | operands_text[op_num] = TRUE; | |
879 | break; | |
880 | } | |
881 | if (fcyc_bits > field->width) | |
882 | abort (); | |
883 | if (enc->coding_method == tic6x_coding_fstg) | |
884 | { | |
885 | operands_text[op_num] = TRUE; | |
886 | snprintf (operands[op_num], 24, "%u", | |
887 | fld_val >> fcyc_bits); | |
888 | } | |
889 | else | |
890 | { | |
891 | operands_text[op_num] = TRUE; | |
892 | snprintf (operands[op_num], 24, "%u", | |
893 | fld_val & ((1 << fcyc_bits) - 1)); | |
894 | } | |
895 | break; | |
896 | ||
897 | case tic6x_coding_spmask: | |
898 | if (fld_val == 0) | |
899 | spmask_skip_operand = TRUE; | |
900 | else | |
901 | { | |
902 | char *p; | |
903 | unsigned int i; | |
904 | ||
905 | operands_text[op_num] = TRUE; | |
906 | p = operands[op_num]; | |
907 | for (i = 0; i < 8; i++) | |
908 | if (fld_val & (1 << i)) | |
909 | { | |
910 | *p++ = "LSDM"[i/2]; | |
911 | *p++ = '1' + (i & 1); | |
912 | *p++ = ','; | |
913 | } | |
914 | p[-1] = 0; | |
915 | } | |
916 | break; | |
917 | ||
918 | case tic6x_coding_fu: | |
919 | case tic6x_coding_data_fu: | |
920 | case tic6x_coding_xpath: | |
921 | /* Don't relate to operands, so operand number is | |
922 | meaningless. */ | |
923 | break; | |
924 | ||
925 | default: | |
926 | abort (); | |
927 | } | |
928 | ||
929 | if (mem_base_reg_known_long && mem_offset_known_long) | |
930 | { | |
931 | if (operands_text[op_num] || operands_pcrel[op_num]) | |
932 | abort (); | |
933 | operands_text[op_num] = TRUE; | |
934 | snprintf (operands[op_num], 24, "*+b%u(%u)", mem_base_reg, | |
935 | mem_offset * opc->operand_info[op_num].size); | |
936 | } | |
937 | ||
938 | if (mem_base_reg_known && mem_offset_known && mem_mode_known | |
939 | && (mem_scaled_known | |
940 | || (opc->operand_info[op_num].form | |
941 | != tic6x_operand_mem_ndw))) | |
942 | { | |
943 | char side; | |
944 | char base[4]; | |
945 | bfd_boolean offset_is_reg; | |
946 | bfd_boolean offset_scaled; | |
947 | char offset[4]; | |
948 | char offsetp[6]; | |
949 | ||
950 | if (operands_text[op_num] || operands_pcrel[op_num]) | |
951 | abort (); | |
952 | ||
953 | side = func_unit_side == 2 ? 'b' : 'a'; | |
954 | snprintf (base, 4, "%c%u", side, mem_base_reg); | |
955 | ||
956 | offset_is_reg = ((mem_mode & 4) ? TRUE : FALSE); | |
957 | if (offset_is_reg) | |
958 | { | |
959 | snprintf (offset, 4, "%c%u", side, mem_offset); | |
960 | if (opc->operand_info[op_num].form | |
961 | == tic6x_operand_mem_ndw) | |
962 | offset_scaled = mem_scaled ? TRUE : FALSE; | |
963 | else | |
964 | offset_scaled = TRUE; | |
965 | } | |
966 | else | |
967 | { | |
968 | if (opc->operand_info[op_num].form | |
969 | == tic6x_operand_mem_ndw) | |
970 | { | |
971 | offset_scaled = mem_scaled ? TRUE : FALSE; | |
972 | snprintf (offset, 4, "%u", mem_offset); | |
973 | } | |
974 | else | |
975 | { | |
976 | offset_scaled = FALSE; | |
977 | snprintf (offset, 4, "%u", | |
978 | (mem_offset | |
979 | * opc->operand_info[op_num].size)); | |
980 | } | |
981 | } | |
982 | ||
983 | if (offset_scaled) | |
984 | snprintf (offsetp, 6, "[%s]", offset); | |
985 | else | |
986 | snprintf (offsetp, 6, "(%s)", offset); | |
987 | ||
988 | operands_text[op_num] = TRUE; | |
989 | switch (mem_mode & ~4u) | |
990 | { | |
991 | case 0: | |
992 | snprintf (operands[op_num], 24, "*-%s%s", base, offsetp); | |
993 | break; | |
994 | ||
995 | case 1: | |
996 | snprintf (operands[op_num], 24, "*+%s%s", base, offsetp); | |
997 | break; | |
998 | ||
999 | case 2: | |
1000 | case 3: | |
1001 | operands_ok = FALSE; | |
1002 | break; | |
1003 | ||
1004 | case 8: | |
1005 | snprintf (operands[op_num], 24, "*--%s%s", base, | |
1006 | offsetp); | |
1007 | break; | |
1008 | ||
1009 | case 9: | |
1010 | snprintf (operands[op_num], 24, "*++%s%s", base, | |
1011 | offsetp); | |
1012 | break; | |
1013 | ||
1014 | case 10: | |
1015 | snprintf (operands[op_num], 24, "*%s--%s", base, | |
1016 | offsetp); | |
1017 | break; | |
1018 | ||
1019 | case 11: | |
1020 | snprintf (operands[op_num], 24, "*%s++%s", base, | |
1021 | offsetp); | |
1022 | break; | |
1023 | ||
1024 | default: | |
1025 | abort (); | |
1026 | } | |
1027 | } | |
1028 | ||
1029 | if (crlo_known && crhi_known) | |
1030 | { | |
1031 | tic6x_rw rw; | |
1032 | tic6x_ctrl_id crid; | |
1033 | ||
1034 | if (operands_text[op_num] || operands_pcrel[op_num]) | |
1035 | abort (); | |
1036 | ||
1037 | rw = opc->operand_info[op_num].rw; | |
1038 | if (rw != tic6x_rw_read | |
1039 | && rw != tic6x_rw_write) | |
1040 | abort (); | |
1041 | ||
1042 | for (crid = 0; crid < tic6x_ctrl_max; crid++) | |
1043 | { | |
1044 | if (crlo == tic6x_ctrl_table[crid].crlo | |
1045 | && (crhi & tic6x_ctrl_table[crid].crhi_mask) == 0 | |
1046 | && (rw == tic6x_rw_read | |
1047 | ? (tic6x_ctrl_table[crid].rw == tic6x_rw_read | |
1048 | || (tic6x_ctrl_table[crid].rw | |
1049 | == tic6x_rw_read_write)) | |
1050 | : (tic6x_ctrl_table[crid].rw == tic6x_rw_write | |
1051 | || (tic6x_ctrl_table[crid].rw | |
1052 | == tic6x_rw_read_write)))) | |
1053 | break; | |
1054 | } | |
1055 | if (crid == tic6x_ctrl_max) | |
1056 | { | |
1057 | operands_text[op_num] = TRUE; | |
1058 | operands_ok = FALSE; | |
1059 | } | |
1060 | else | |
1061 | { | |
1062 | operands_text[op_num] = TRUE; | |
1063 | snprintf (operands[op_num], 24, "%s", | |
1064 | tic6x_ctrl_table[crid].name); | |
1065 | } | |
1066 | } | |
1067 | ||
1068 | if (operands_text[op_num] || operands_pcrel[op_num] | |
1069 | || spmask_skip_operand) | |
1070 | break; | |
1071 | } | |
1072 | if (spmask_skip_operand) | |
1073 | { | |
1074 | /* SPMASK operands are only valid as the single operand | |
1075 | in the opcode table. */ | |
1076 | if (num_operands != 1) | |
1077 | abort (); | |
1078 | num_operands = 0; | |
1079 | break; | |
1080 | } | |
1081 | /* The operand must by now have been decoded. */ | |
1082 | if (!operands_text[op_num] && !operands_pcrel[op_num]) | |
1083 | abort (); | |
1084 | } | |
1085 | ||
1086 | if (!operands_ok) | |
1087 | continue; | |
1088 | ||
1089 | info->bytes_per_chunk = num_bits / 8; | |
1090 | info->fprintf_func (info->stream, "%s%s%s%s", parallel, cond, | |
1091 | opc->name, func_unit); | |
1092 | for (op_num = 0; op_num < num_operands; op_num++) | |
1093 | { | |
1094 | info->fprintf_func (info->stream, "%c", (op_num == 0 ? ' ' : ',')); | |
1095 | if (operands_pcrel[op_num]) | |
1096 | info->print_address_func (operands_addresses[op_num], info); | |
1097 | else | |
1098 | info->fprintf_func (info->stream, "%s", operands[op_num]); | |
1099 | } | |
1100 | if (fetch_packet_header_based && header.prot) | |
1101 | info->fprintf_func (info->stream, " || nop 5"); | |
1102 | ||
1103 | return num_bits / 8; | |
1104 | } | |
1105 | ||
1106 | info->bytes_per_chunk = num_bits / 8; | |
1107 | info->fprintf_func (info->stream, "<undefined instruction 0x%.*x>", | |
1108 | (int) num_bits / 4, opcode); | |
1109 | return num_bits / 8; | |
1110 | } |