]>
Commit | Line | Data |
---|---|---|
a06ea964 | 1 | /* aarch64-dis.c -- AArch64 disassembler. |
fd67aa11 | 2 | Copyright (C) 2009-2024 Free Software Foundation, Inc. |
a06ea964 NC |
3 | Contributed by ARM Ltd. |
4 | ||
5 | This file is part of the GNU opcodes library. | |
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, or (at your option) | |
10 | 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; see the file COPYING3. If not, | |
19 | see <http://www.gnu.org/licenses/>. */ | |
20 | ||
21 | #include "sysdep.h" | |
3dfb1b6d | 22 | #include <stdint.h> |
6394c606 | 23 | #include "disassemble.h" |
a06ea964 NC |
24 | #include "libiberty.h" |
25 | #include "opintl.h" | |
26 | #include "aarch64-dis.h" | |
a06ea964 | 27 | #include "elf-bfd.h" |
76a4c1e0 AB |
28 | #include "safe-ctype.h" |
29 | #include "obstack.h" | |
30 | ||
31 | #define obstack_chunk_alloc xmalloc | |
32 | #define obstack_chunk_free free | |
a06ea964 | 33 | |
a06ea964 NC |
34 | #define INSNLEN 4 |
35 | ||
76a4c1e0 AB |
36 | /* This character is used to encode style information within the output |
37 | buffers. See get_style_text and print_operands for more details. */ | |
38 | #define STYLE_MARKER_CHAR '\002' | |
39 | ||
a06ea964 NC |
40 | /* Cached mapping symbol state. */ |
41 | enum map_type | |
42 | { | |
43 | MAP_INSN, | |
44 | MAP_DATA | |
45 | }; | |
46 | ||
95830c98 | 47 | static aarch64_feature_set arch_variant; /* See select_aarch64_variant. */ |
a06ea964 NC |
48 | static enum map_type last_type; |
49 | static int last_mapping_sym = -1; | |
53b2f36b | 50 | static bfd_vma last_stop_offset = 0; |
a06ea964 NC |
51 | static bfd_vma last_mapping_addr = 0; |
52 | ||
53 | /* Other options */ | |
54 | static int no_aliases = 0; /* If set disassemble as most general inst. */ | |
7d02540a TC |
55 | \fstatic int no_notes = 1; /* If set do not print disassemble notes in the |
56 | output as comments. */ | |
a06ea964 | 57 | |
7e84b55d | 58 | /* Currently active instruction sequence. */ |
bde90be2 | 59 | static aarch64_instr_sequence insn_sequence; |
7e84b55d | 60 | |
a06ea964 NC |
61 | static void |
62 | set_default_aarch64_dis_options (struct disassemble_info *info ATTRIBUTE_UNUSED) | |
63 | { | |
64 | } | |
65 | ||
66 | static void | |
67 | parse_aarch64_dis_option (const char *option, unsigned int len ATTRIBUTE_UNUSED) | |
68 | { | |
69 | /* Try to match options that are simple flags */ | |
08dedd66 | 70 | if (startswith (option, "no-aliases")) |
a06ea964 NC |
71 | { |
72 | no_aliases = 1; | |
73 | return; | |
74 | } | |
75 | ||
08dedd66 | 76 | if (startswith (option, "aliases")) |
a06ea964 NC |
77 | { |
78 | no_aliases = 0; | |
79 | return; | |
80 | } | |
81 | ||
08dedd66 | 82 | if (startswith (option, "no-notes")) |
7d02540a TC |
83 | { |
84 | no_notes = 1; | |
85 | return; | |
86 | } | |
87 | ||
08dedd66 | 88 | if (startswith (option, "notes")) |
7d02540a TC |
89 | { |
90 | no_notes = 0; | |
91 | return; | |
92 | } | |
93 | ||
a06ea964 | 94 | #ifdef DEBUG_AARCH64 |
08dedd66 | 95 | if (startswith (option, "debug_dump")) |
a06ea964 NC |
96 | { |
97 | debug_dump = 1; | |
98 | return; | |
99 | } | |
100 | #endif /* DEBUG_AARCH64 */ | |
101 | ||
102 | /* Invalid option. */ | |
a6743a54 | 103 | opcodes_error_handler (_("unrecognised disassembler option: %s"), option); |
a06ea964 NC |
104 | } |
105 | ||
106 | static void | |
107 | parse_aarch64_dis_options (const char *options) | |
108 | { | |
109 | const char *option_end; | |
110 | ||
111 | if (options == NULL) | |
112 | return; | |
113 | ||
114 | while (*options != '\0') | |
115 | { | |
116 | /* Skip empty options. */ | |
117 | if (*options == ',') | |
118 | { | |
119 | options++; | |
120 | continue; | |
121 | } | |
122 | ||
123 | /* We know that *options is neither NUL or a comma. */ | |
124 | option_end = options + 1; | |
125 | while (*option_end != ',' && *option_end != '\0') | |
126 | option_end++; | |
127 | ||
128 | parse_aarch64_dis_option (options, option_end - options); | |
129 | ||
130 | /* Go on to the next one. If option_end points to a comma, it | |
131 | will be skipped above. */ | |
132 | options = option_end; | |
133 | } | |
134 | } | |
135 | \f | |
136 | /* Functions doing the instruction disassembling. */ | |
137 | ||
138 | /* The unnamed arguments consist of the number of fields and information about | |
139 | these fields where the VALUE will be extracted from CODE and returned. | |
140 | MASK can be zero or the base mask of the opcode. | |
141 | ||
142 | N.B. the fields are required to be in such an order than the most signficant | |
143 | field for VALUE comes the first, e.g. the <index> in | |
144 | SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>] | |
9aff4b7a | 145 | is encoded in H:L:M in some cases, the fields H:L:M should be passed in |
a06ea964 NC |
146 | the order of H, L, M. */ |
147 | ||
c0890d26 | 148 | aarch64_insn |
a06ea964 NC |
149 | extract_fields (aarch64_insn code, aarch64_insn mask, ...) |
150 | { | |
151 | uint32_t num; | |
152 | const aarch64_field *field; | |
153 | enum aarch64_field_kind kind; | |
154 | va_list va; | |
155 | ||
156 | va_start (va, mask); | |
157 | num = va_arg (va, uint32_t); | |
158 | assert (num <= 5); | |
159 | aarch64_insn value = 0x0; | |
160 | while (num--) | |
161 | { | |
162 | kind = va_arg (va, enum aarch64_field_kind); | |
163 | field = &fields[kind]; | |
164 | value <<= field->width; | |
165 | value |= extract_field (kind, code, mask); | |
166 | } | |
109c1107 | 167 | va_end (va); |
a06ea964 NC |
168 | return value; |
169 | } | |
170 | ||
99e01a66 RS |
171 | /* Extract the value of all fields in SELF->fields after START from |
172 | instruction CODE. The least significant bit comes from the final field. */ | |
b5464a68 RS |
173 | |
174 | static aarch64_insn | |
99e01a66 RS |
175 | extract_all_fields_after (const aarch64_operand *self, unsigned int start, |
176 | aarch64_insn code) | |
b5464a68 RS |
177 | { |
178 | aarch64_insn value; | |
179 | unsigned int i; | |
180 | enum aarch64_field_kind kind; | |
181 | ||
182 | value = 0; | |
99e01a66 RS |
183 | for (i = start; |
184 | i < ARRAY_SIZE (self->fields) && self->fields[i] != FLD_NIL; ++i) | |
b5464a68 RS |
185 | { |
186 | kind = self->fields[i]; | |
187 | value <<= fields[kind].width; | |
188 | value |= extract_field (kind, code, 0); | |
189 | } | |
190 | return value; | |
191 | } | |
192 | ||
99e01a66 RS |
193 | /* Extract the value of all fields in SELF->fields from instruction CODE. |
194 | The least significant bit comes from the final field. */ | |
195 | ||
196 | static aarch64_insn | |
197 | extract_all_fields (const aarch64_operand *self, aarch64_insn code) | |
198 | { | |
199 | return extract_all_fields_after (self, 0, code); | |
200 | } | |
201 | ||
a06ea964 | 202 | /* Sign-extend bit I of VALUE. */ |
f81e7e2d | 203 | static inline uint64_t |
a06ea964 NC |
204 | sign_extend (aarch64_insn value, unsigned i) |
205 | { | |
f81e7e2d | 206 | uint64_t ret, sign; |
a06ea964 NC |
207 | |
208 | assert (i < 32); | |
f81e7e2d AM |
209 | ret = value; |
210 | sign = (uint64_t) 1 << i; | |
211 | return ((ret & (sign + sign - 1)) ^ sign) - sign; | |
a06ea964 NC |
212 | } |
213 | ||
214 | /* N.B. the following inline helpfer functions create a dependency on the | |
215 | order of operand qualifier enumerators. */ | |
216 | ||
217 | /* Given VALUE, return qualifier for a general purpose register. */ | |
218 | static inline enum aarch64_opnd_qualifier | |
219 | get_greg_qualifier_from_value (aarch64_insn value) | |
220 | { | |
221 | enum aarch64_opnd_qualifier qualifier = AARCH64_OPND_QLF_W + value; | |
222 | assert (value <= 0x1 | |
223 | && aarch64_get_qualifier_standard_value (qualifier) == value); | |
224 | return qualifier; | |
225 | } | |
226 | ||
3067d3b9 MW |
227 | /* Given VALUE, return qualifier for a vector register. This does not support |
228 | decoding instructions that accept the 2H vector type. */ | |
229 | ||
a06ea964 NC |
230 | static inline enum aarch64_opnd_qualifier |
231 | get_vreg_qualifier_from_value (aarch64_insn value) | |
232 | { | |
233 | enum aarch64_opnd_qualifier qualifier = AARCH64_OPND_QLF_V_8B + value; | |
234 | ||
3067d3b9 MW |
235 | /* Instructions using vector type 2H should not call this function. Skip over |
236 | the 2H qualifier. */ | |
237 | if (qualifier >= AARCH64_OPND_QLF_V_2H) | |
238 | qualifier += 1; | |
239 | ||
a06ea964 NC |
240 | assert (value <= 0x8 |
241 | && aarch64_get_qualifier_standard_value (qualifier) == value); | |
242 | return qualifier; | |
243 | } | |
244 | ||
245 | /* Given VALUE, return qualifier for an FP or AdvSIMD scalar register. */ | |
246 | static inline enum aarch64_opnd_qualifier | |
247 | get_sreg_qualifier_from_value (aarch64_insn value) | |
248 | { | |
249 | enum aarch64_opnd_qualifier qualifier = AARCH64_OPND_QLF_S_B + value; | |
250 | ||
251 | assert (value <= 0x4 | |
252 | && aarch64_get_qualifier_standard_value (qualifier) == value); | |
253 | return qualifier; | |
254 | } | |
255 | ||
256 | /* Given the instruction in *INST which is probably half way through the | |
257 | decoding and our caller wants to know the expected qualifier for operand | |
258 | I. Return such a qualifier if we can establish it; otherwise return | |
259 | AARCH64_OPND_QLF_NIL. */ | |
260 | ||
261 | static aarch64_opnd_qualifier_t | |
262 | get_expected_qualifier (const aarch64_inst *inst, int i) | |
263 | { | |
264 | aarch64_opnd_qualifier_seq_t qualifiers; | |
265 | /* Should not be called if the qualifier is known. */ | |
266 | assert (inst->operands[i].qualifier == AARCH64_OPND_QLF_NIL); | |
b5b4f665 | 267 | int invalid_count; |
a06ea964 | 268 | if (aarch64_find_best_match (inst, inst->opcode->qualifiers_list, |
b5b4f665 | 269 | i, qualifiers, &invalid_count)) |
a06ea964 NC |
270 | return qualifiers[i]; |
271 | else | |
272 | return AARCH64_OPND_QLF_NIL; | |
273 | } | |
274 | ||
275 | /* Operand extractors. */ | |
276 | ||
78933a4a | 277 | bool |
c2e5c986 SD |
278 | aarch64_ext_none (const aarch64_operand *self ATTRIBUTE_UNUSED, |
279 | aarch64_opnd_info *info ATTRIBUTE_UNUSED, | |
280 | const aarch64_insn code ATTRIBUTE_UNUSED, | |
281 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
282 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
283 | { | |
78933a4a | 284 | return true; |
c2e5c986 SD |
285 | } |
286 | ||
78933a4a | 287 | bool |
a06ea964 NC |
288 | aarch64_ext_regno (const aarch64_operand *self, aarch64_opnd_info *info, |
289 | const aarch64_insn code, | |
561a72d4 TC |
290 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
291 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 | 292 | { |
b408ebbf RS |
293 | info->reg.regno = (extract_field (self->fields[0], code, 0) |
294 | + get_operand_specific_data (self)); | |
78933a4a | 295 | return true; |
a06ea964 NC |
296 | } |
297 | ||
78933a4a | 298 | bool |
ee804238 JW |
299 | aarch64_ext_regno_pair (const aarch64_operand *self ATTRIBUTE_UNUSED, aarch64_opnd_info *info, |
300 | const aarch64_insn code ATTRIBUTE_UNUSED, | |
561a72d4 TC |
301 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
302 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
ee804238 JW |
303 | { |
304 | assert (info->idx == 1 | |
d30eb38d VDN |
305 | || info->idx == 3); |
306 | ||
307 | unsigned prev_regno = inst->operands[info->idx - 1].reg.regno; | |
308 | info->reg.regno = (prev_regno == 0x1f) ? 0x1f | |
309 | : prev_regno + 1; | |
78933a4a | 310 | return true; |
ee804238 JW |
311 | } |
312 | ||
a06ea964 | 313 | /* e.g. IC <ic_op>{, <Xt>}. */ |
78933a4a | 314 | bool |
a06ea964 NC |
315 | aarch64_ext_regrt_sysins (const aarch64_operand *self, aarch64_opnd_info *info, |
316 | const aarch64_insn code, | |
561a72d4 TC |
317 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
318 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
319 | { |
320 | info->reg.regno = extract_field (self->fields[0], code, 0); | |
321 | assert (info->idx == 1 | |
322 | && (aarch64_get_operand_class (inst->operands[0].type) | |
323 | == AARCH64_OPND_CLASS_SYSTEM)); | |
324 | /* This will make the constraint checking happy and more importantly will | |
325 | help the disassembler determine whether this operand is optional or | |
326 | not. */ | |
ea2deeec | 327 | info->present = aarch64_sys_ins_reg_has_xt (inst->operands[0].sysins_op); |
a06ea964 | 328 | |
78933a4a | 329 | return true; |
a06ea964 NC |
330 | } |
331 | ||
332 | /* e.g. SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]. */ | |
78933a4a | 333 | bool |
a06ea964 NC |
334 | aarch64_ext_reglane (const aarch64_operand *self, aarch64_opnd_info *info, |
335 | const aarch64_insn code, | |
561a72d4 TC |
336 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
337 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
338 | { |
339 | /* regno */ | |
340 | info->reglane.regno = extract_field (self->fields[0], code, | |
341 | inst->opcode->mask); | |
342 | ||
343 | /* Index and/or type. */ | |
344 | if (inst->opcode->iclass == asisdone | |
345 | || inst->opcode->iclass == asimdins) | |
346 | { | |
347 | if (info->type == AARCH64_OPND_En | |
348 | && inst->opcode->operands[0] == AARCH64_OPND_Ed) | |
349 | { | |
350 | unsigned shift; | |
351 | /* index2 for e.g. INS <Vd>.<Ts>[<index1>], <Vn>.<Ts>[<index2>]. */ | |
352 | assert (info->idx == 1); /* Vn */ | |
1d106042 | 353 | aarch64_insn value = extract_field (FLD_imm4_11, code, 0); |
a06ea964 NC |
354 | /* Depend on AARCH64_OPND_Ed to determine the qualifier. */ |
355 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
356 | shift = get_logsz (aarch64_get_qualifier_esize (info->qualifier)); | |
357 | info->reglane.index = value >> shift; | |
358 | } | |
359 | else | |
360 | { | |
361 | /* index and type for e.g. DUP <V><d>, <Vn>.<T>[<index>]. | |
362 | imm5<3:0> <V> | |
363 | 0000 RESERVED | |
364 | xxx1 B | |
365 | xx10 H | |
366 | x100 S | |
367 | 1000 D */ | |
368 | int pos = -1; | |
369 | aarch64_insn value = extract_field (FLD_imm5, code, 0); | |
370 | while (++pos <= 3 && (value & 0x1) == 0) | |
371 | value >>= 1; | |
372 | if (pos > 3) | |
78933a4a | 373 | return false; |
a06ea964 NC |
374 | info->qualifier = get_sreg_qualifier_from_value (pos); |
375 | info->reglane.index = (unsigned) (value >> 1); | |
376 | } | |
377 | } | |
65a55fbb TC |
378 | else if (inst->opcode->iclass == dotproduct) |
379 | { | |
380 | /* Need information in other operand(s) to help decoding. */ | |
381 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
382 | switch (info->qualifier) | |
383 | { | |
00c2093f | 384 | case AARCH64_OPND_QLF_S_4B: |
df678013 | 385 | case AARCH64_OPND_QLF_S_2H: |
65a55fbb TC |
386 | /* L:H */ |
387 | info->reglane.index = extract_fields (code, 0, 2, FLD_H, FLD_L); | |
388 | info->reglane.regno &= 0x1f; | |
389 | break; | |
390 | default: | |
78933a4a | 391 | return false; |
65a55fbb TC |
392 | } |
393 | } | |
f42f1a1d TC |
394 | else if (inst->opcode->iclass == cryptosm3) |
395 | { | |
396 | /* index for e.g. SM3TT2A <Vd>.4S, <Vn>.4S, <Vm>S[<imm2>]. */ | |
397 | info->reglane.index = extract_field (FLD_SM3_imm2, code, 0); | |
398 | } | |
a06ea964 NC |
399 | else |
400 | { | |
401 | /* Index only for e.g. SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>] | |
402 | or SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]. */ | |
403 | ||
404 | /* Need information in other operand(s) to help decoding. */ | |
405 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
406 | switch (info->qualifier) | |
407 | { | |
408 | case AARCH64_OPND_QLF_S_H: | |
369c9167 TC |
409 | if (info->type == AARCH64_OPND_Em16) |
410 | { | |
411 | /* h:l:m */ | |
412 | info->reglane.index = extract_fields (code, 0, 3, FLD_H, FLD_L, | |
413 | FLD_M); | |
414 | info->reglane.regno &= 0xf; | |
415 | } | |
416 | else | |
417 | { | |
418 | /* h:l */ | |
419 | info->reglane.index = extract_fields (code, 0, 2, FLD_H, FLD_L); | |
420 | } | |
a06ea964 NC |
421 | break; |
422 | case AARCH64_OPND_QLF_S_S: | |
423 | /* h:l */ | |
424 | info->reglane.index = extract_fields (code, 0, 2, FLD_H, FLD_L); | |
425 | break; | |
426 | case AARCH64_OPND_QLF_S_D: | |
427 | /* H */ | |
428 | info->reglane.index = extract_field (FLD_H, code, 0); | |
429 | break; | |
430 | default: | |
78933a4a | 431 | return false; |
a06ea964 | 432 | } |
c2c4ff8d | 433 | |
369c9167 TC |
434 | if (inst->opcode->op == OP_FCMLA_ELEM |
435 | && info->qualifier != AARCH64_OPND_QLF_S_H) | |
c2c4ff8d SN |
436 | { |
437 | /* Complex operand takes two elements. */ | |
438 | if (info->reglane.index & 1) | |
78933a4a | 439 | return false; |
c2c4ff8d SN |
440 | info->reglane.index /= 2; |
441 | } | |
a06ea964 NC |
442 | } |
443 | ||
78933a4a | 444 | return true; |
a06ea964 NC |
445 | } |
446 | ||
78933a4a | 447 | bool |
a06ea964 NC |
448 | aarch64_ext_reglist (const aarch64_operand *self, aarch64_opnd_info *info, |
449 | const aarch64_insn code, | |
561a72d4 TC |
450 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
451 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
452 | { |
453 | /* R */ | |
454 | info->reglist.first_regno = extract_field (self->fields[0], code, 0); | |
455 | /* len */ | |
456 | info->reglist.num_regs = extract_field (FLD_len, code, 0) + 1; | |
f5b57fea | 457 | info->reglist.stride = 1; |
78933a4a | 458 | return true; |
a06ea964 NC |
459 | } |
460 | ||
461 | /* Decode Rt and opcode fields of Vt in AdvSIMD load/store instructions. */ | |
78933a4a | 462 | bool |
a06ea964 NC |
463 | aarch64_ext_ldst_reglist (const aarch64_operand *self ATTRIBUTE_UNUSED, |
464 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
465 | const aarch64_inst *inst, |
466 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
467 | { |
468 | aarch64_insn value; | |
469 | /* Number of elements in each structure to be loaded/stored. */ | |
470 | unsigned expected_num = get_opcode_dependent_value (inst->opcode); | |
471 | ||
472 | struct | |
473 | { | |
474 | unsigned is_reserved; | |
475 | unsigned num_regs; | |
476 | unsigned num_elements; | |
477 | } data [] = | |
478 | { {0, 4, 4}, | |
479 | {1, 4, 4}, | |
480 | {0, 4, 1}, | |
481 | {0, 4, 2}, | |
482 | {0, 3, 3}, | |
483 | {1, 3, 3}, | |
484 | {0, 3, 1}, | |
485 | {0, 1, 1}, | |
486 | {0, 2, 2}, | |
487 | {1, 2, 2}, | |
488 | {0, 2, 1}, | |
489 | }; | |
490 | ||
491 | /* Rt */ | |
492 | info->reglist.first_regno = extract_field (FLD_Rt, code, 0); | |
493 | /* opcode */ | |
494 | value = extract_field (FLD_opcode, code, 0); | |
cd3ea7c6 NC |
495 | /* PR 21595: Check for a bogus value. */ |
496 | if (value >= ARRAY_SIZE (data)) | |
78933a4a | 497 | return false; |
a06ea964 | 498 | if (expected_num != data[value].num_elements || data[value].is_reserved) |
78933a4a | 499 | return false; |
a06ea964 | 500 | info->reglist.num_regs = data[value].num_regs; |
f5b57fea | 501 | info->reglist.stride = 1; |
a06ea964 | 502 | |
78933a4a | 503 | return true; |
a06ea964 NC |
504 | } |
505 | ||
506 | /* Decode Rt and S fields of Vt in AdvSIMD load single structure to all | |
507 | lanes instructions. */ | |
78933a4a | 508 | bool |
a06ea964 NC |
509 | aarch64_ext_ldst_reglist_r (const aarch64_operand *self ATTRIBUTE_UNUSED, |
510 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
511 | const aarch64_inst *inst, |
512 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
513 | { |
514 | aarch64_insn value; | |
515 | ||
516 | /* Rt */ | |
517 | info->reglist.first_regno = extract_field (FLD_Rt, code, 0); | |
518 | /* S */ | |
519 | value = extract_field (FLD_S, code, 0); | |
520 | ||
521 | /* Number of registers is equal to the number of elements in | |
522 | each structure to be loaded/stored. */ | |
523 | info->reglist.num_regs = get_opcode_dependent_value (inst->opcode); | |
524 | assert (info->reglist.num_regs >= 1 && info->reglist.num_regs <= 4); | |
525 | ||
526 | /* Except when it is LD1R. */ | |
527 | if (info->reglist.num_regs == 1 && value == (aarch64_insn) 1) | |
528 | info->reglist.num_regs = 2; | |
529 | ||
f5b57fea | 530 | info->reglist.stride = 1; |
78933a4a | 531 | return true; |
a06ea964 NC |
532 | } |
533 | ||
534 | /* Decode Q, opcode<2:1>, S, size and Rt fields of Vt in AdvSIMD | |
535 | load/store single element instructions. */ | |
78933a4a | 536 | bool |
a06ea964 NC |
537 | aarch64_ext_ldst_elemlist (const aarch64_operand *self ATTRIBUTE_UNUSED, |
538 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
539 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
540 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
541 | { |
542 | aarch64_field field = {0, 0}; | |
543 | aarch64_insn QSsize; /* fields Q:S:size. */ | |
544 | aarch64_insn opcodeh2; /* opcode<2:1> */ | |
545 | ||
546 | /* Rt */ | |
547 | info->reglist.first_regno = extract_field (FLD_Rt, code, 0); | |
548 | ||
549 | /* Decode the index, opcode<2:1> and size. */ | |
550 | gen_sub_field (FLD_asisdlso_opcode, 1, 2, &field); | |
551 | opcodeh2 = extract_field_2 (&field, code, 0); | |
552 | QSsize = extract_fields (code, 0, 3, FLD_Q, FLD_S, FLD_vldst_size); | |
553 | switch (opcodeh2) | |
554 | { | |
555 | case 0x0: | |
556 | info->qualifier = AARCH64_OPND_QLF_S_B; | |
557 | /* Index encoded in "Q:S:size". */ | |
558 | info->reglist.index = QSsize; | |
559 | break; | |
560 | case 0x1: | |
76dfed02 YZ |
561 | if (QSsize & 0x1) |
562 | /* UND. */ | |
78933a4a | 563 | return false; |
a06ea964 NC |
564 | info->qualifier = AARCH64_OPND_QLF_S_H; |
565 | /* Index encoded in "Q:S:size<1>". */ | |
566 | info->reglist.index = QSsize >> 1; | |
567 | break; | |
568 | case 0x2: | |
76dfed02 YZ |
569 | if ((QSsize >> 1) & 0x1) |
570 | /* UND. */ | |
78933a4a | 571 | return false; |
a06ea964 NC |
572 | if ((QSsize & 0x1) == 0) |
573 | { | |
574 | info->qualifier = AARCH64_OPND_QLF_S_S; | |
575 | /* Index encoded in "Q:S". */ | |
576 | info->reglist.index = QSsize >> 2; | |
577 | } | |
578 | else | |
579 | { | |
a06ea964 NC |
580 | if (extract_field (FLD_S, code, 0)) |
581 | /* UND */ | |
78933a4a | 582 | return false; |
76dfed02 YZ |
583 | info->qualifier = AARCH64_OPND_QLF_S_D; |
584 | /* Index encoded in "Q". */ | |
585 | info->reglist.index = QSsize >> 3; | |
a06ea964 NC |
586 | } |
587 | break; | |
588 | default: | |
78933a4a | 589 | return false; |
a06ea964 NC |
590 | } |
591 | ||
592 | info->reglist.has_index = 1; | |
593 | info->reglist.num_regs = 0; | |
f5b57fea | 594 | info->reglist.stride = 1; |
a06ea964 NC |
595 | /* Number of registers is equal to the number of elements in |
596 | each structure to be loaded/stored. */ | |
597 | info->reglist.num_regs = get_opcode_dependent_value (inst->opcode); | |
598 | assert (info->reglist.num_regs >= 1 && info->reglist.num_regs <= 4); | |
599 | ||
78933a4a | 600 | return true; |
a06ea964 NC |
601 | } |
602 | ||
603 | /* Decode fields immh:immb and/or Q for e.g. | |
604 | SSHR <Vd>.<T>, <Vn>.<T>, #<shift> | |
605 | or SSHR <V><d>, <V><n>, #<shift>. */ | |
606 | ||
78933a4a | 607 | bool |
a06ea964 NC |
608 | aarch64_ext_advsimd_imm_shift (const aarch64_operand *self ATTRIBUTE_UNUSED, |
609 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
610 | const aarch64_inst *inst, |
611 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
612 | { |
613 | int pos; | |
614 | aarch64_insn Q, imm, immh; | |
615 | enum aarch64_insn_class iclass = inst->opcode->iclass; | |
616 | ||
617 | immh = extract_field (FLD_immh, code, 0); | |
618 | if (immh == 0) | |
78933a4a | 619 | return false; |
a06ea964 NC |
620 | imm = extract_fields (code, 0, 2, FLD_immh, FLD_immb); |
621 | pos = 4; | |
622 | /* Get highest set bit in immh. */ | |
623 | while (--pos >= 0 && (immh & 0x8) == 0) | |
624 | immh <<= 1; | |
625 | ||
626 | assert ((iclass == asimdshf || iclass == asisdshf) | |
627 | && (info->type == AARCH64_OPND_IMM_VLSR | |
628 | || info->type == AARCH64_OPND_IMM_VLSL)); | |
629 | ||
630 | if (iclass == asimdshf) | |
631 | { | |
632 | Q = extract_field (FLD_Q, code, 0); | |
633 | /* immh Q <T> | |
634 | 0000 x SEE AdvSIMD modified immediate | |
635 | 0001 0 8B | |
636 | 0001 1 16B | |
637 | 001x 0 4H | |
638 | 001x 1 8H | |
639 | 01xx 0 2S | |
640 | 01xx 1 4S | |
641 | 1xxx 0 RESERVED | |
642 | 1xxx 1 2D */ | |
643 | info->qualifier = | |
644 | get_vreg_qualifier_from_value ((pos << 1) | (int) Q); | |
645 | } | |
646 | else | |
647 | info->qualifier = get_sreg_qualifier_from_value (pos); | |
648 | ||
649 | if (info->type == AARCH64_OPND_IMM_VLSR) | |
650 | /* immh <shift> | |
651 | 0000 SEE AdvSIMD modified immediate | |
652 | 0001 (16-UInt(immh:immb)) | |
653 | 001x (32-UInt(immh:immb)) | |
654 | 01xx (64-UInt(immh:immb)) | |
655 | 1xxx (128-UInt(immh:immb)) */ | |
656 | info->imm.value = (16 << pos) - imm; | |
657 | else | |
658 | /* immh:immb | |
659 | immh <shift> | |
660 | 0000 SEE AdvSIMD modified immediate | |
661 | 0001 (UInt(immh:immb)-8) | |
662 | 001x (UInt(immh:immb)-16) | |
663 | 01xx (UInt(immh:immb)-32) | |
664 | 1xxx (UInt(immh:immb)-64) */ | |
665 | info->imm.value = imm - (8 << pos); | |
666 | ||
78933a4a | 667 | return true; |
a06ea964 NC |
668 | } |
669 | ||
670 | /* Decode shift immediate for e.g. sshr (imm). */ | |
78933a4a | 671 | bool |
a06ea964 NC |
672 | aarch64_ext_shll_imm (const aarch64_operand *self ATTRIBUTE_UNUSED, |
673 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
674 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
675 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
676 | { |
677 | int64_t imm; | |
678 | aarch64_insn val; | |
679 | val = extract_field (FLD_size, code, 0); | |
680 | switch (val) | |
681 | { | |
682 | case 0: imm = 8; break; | |
683 | case 1: imm = 16; break; | |
684 | case 2: imm = 32; break; | |
78933a4a | 685 | default: return false; |
a06ea964 NC |
686 | } |
687 | info->imm.value = imm; | |
78933a4a | 688 | return true; |
a06ea964 NC |
689 | } |
690 | ||
691 | /* Decode imm for e.g. BFM <Wd>, <Wn>, #<immr>, #<imms>. | |
692 | value in the field(s) will be extracted as unsigned immediate value. */ | |
78933a4a | 693 | bool |
a06ea964 NC |
694 | aarch64_ext_imm (const aarch64_operand *self, aarch64_opnd_info *info, |
695 | const aarch64_insn code, | |
3dd032c5 | 696 | const aarch64_inst *inst, |
561a72d4 | 697 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
a06ea964 | 698 | { |
f81e7e2d | 699 | uint64_t imm; |
a06ea964 | 700 | |
b5464a68 | 701 | imm = extract_all_fields (self, code); |
a06ea964 | 702 | |
a06ea964 NC |
703 | if (operand_need_sign_extension (self)) |
704 | imm = sign_extend (imm, get_operand_fields_width (self) - 1); | |
705 | ||
706 | if (operand_need_shift_by_two (self)) | |
707 | imm <<= 2; | |
cbd11b88 RS |
708 | else if (operand_need_shift_by_three (self)) |
709 | imm <<= 3; | |
193614f2 SD |
710 | else if (operand_need_shift_by_four (self)) |
711 | imm <<= 4; | |
a06ea964 NC |
712 | |
713 | if (info->type == AARCH64_OPND_ADDR_ADRP) | |
714 | imm <<= 12; | |
715 | ||
3dd032c5 PW |
716 | if (inst->operands[0].type == AARCH64_OPND_PSTATEFIELD |
717 | && inst->operands[0].sysreg.flags & F_IMM_IN_CRM) | |
718 | imm &= PSTATE_DECODE_CRM_IMM (inst->operands[0].sysreg.flags); | |
719 | ||
a06ea964 | 720 | info->imm.value = imm; |
78933a4a | 721 | return true; |
a06ea964 NC |
722 | } |
723 | ||
724 | /* Decode imm and its shifter for e.g. MOVZ <Wd>, #<imm16>{, LSL #<shift>}. */ | |
78933a4a | 725 | bool |
a06ea964 NC |
726 | aarch64_ext_imm_half (const aarch64_operand *self, aarch64_opnd_info *info, |
727 | const aarch64_insn code, | |
561a72d4 TC |
728 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
729 | aarch64_operand_error *errors) | |
a06ea964 | 730 | { |
561a72d4 | 731 | aarch64_ext_imm (self, info, code, inst, errors); |
a06ea964 NC |
732 | info->shifter.kind = AARCH64_MOD_LSL; |
733 | info->shifter.amount = extract_field (FLD_hw, code, 0) << 4; | |
78933a4a | 734 | return true; |
a06ea964 NC |
735 | } |
736 | ||
737 | /* Decode cmode and "a:b:c:d:e:f:g:h" for e.g. | |
738 | MOVI <Vd>.<T>, #<imm8> {, LSL #<amount>}. */ | |
78933a4a | 739 | bool |
a06ea964 NC |
740 | aarch64_ext_advsimd_imm_modified (const aarch64_operand *self ATTRIBUTE_UNUSED, |
741 | aarch64_opnd_info *info, | |
742 | const aarch64_insn code, | |
561a72d4 TC |
743 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
744 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
745 | { |
746 | uint64_t imm; | |
747 | enum aarch64_opnd_qualifier opnd0_qualifier = inst->operands[0].qualifier; | |
748 | aarch64_field field = {0, 0}; | |
749 | ||
750 | assert (info->idx == 1); | |
751 | ||
752 | if (info->type == AARCH64_OPND_SIMD_FPIMM) | |
753 | info->imm.is_fp = 1; | |
754 | ||
755 | /* a:b:c:d:e:f:g:h */ | |
756 | imm = extract_fields (code, 0, 2, FLD_abc, FLD_defgh); | |
757 | if (!info->imm.is_fp && aarch64_get_qualifier_esize (opnd0_qualifier) == 8) | |
758 | { | |
759 | /* Either MOVI <Dd>, #<imm> | |
760 | or MOVI <Vd>.2D, #<imm>. | |
761 | <imm> is a 64-bit immediate | |
762 | 'aaaaaaaabbbbbbbbccccccccddddddddeeeeeeeeffffffffgggggggghhhhhhhh', | |
763 | encoded in "a:b:c:d:e:f:g:h". */ | |
764 | int i; | |
765 | unsigned abcdefgh = imm; | |
766 | for (imm = 0ull, i = 0; i < 8; i++) | |
767 | if (((abcdefgh >> i) & 0x1) != 0) | |
768 | imm |= 0xffull << (8 * i); | |
769 | } | |
770 | info->imm.value = imm; | |
771 | ||
772 | /* cmode */ | |
773 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
774 | switch (info->qualifier) | |
775 | { | |
776 | case AARCH64_OPND_QLF_NIL: | |
777 | /* no shift */ | |
778 | info->shifter.kind = AARCH64_MOD_NONE; | |
779 | return 1; | |
780 | case AARCH64_OPND_QLF_LSL: | |
781 | /* shift zeros */ | |
782 | info->shifter.kind = AARCH64_MOD_LSL; | |
783 | switch (aarch64_get_qualifier_esize (opnd0_qualifier)) | |
784 | { | |
785 | case 4: gen_sub_field (FLD_cmode, 1, 2, &field); break; /* per word */ | |
786 | case 2: gen_sub_field (FLD_cmode, 1, 1, &field); break; /* per half */ | |
f5555712 | 787 | case 1: gen_sub_field (FLD_cmode, 1, 0, &field); break; /* per byte */ |
7060c28e | 788 | default: return false; |
a06ea964 NC |
789 | } |
790 | /* 00: 0; 01: 8; 10:16; 11:24. */ | |
791 | info->shifter.amount = extract_field_2 (&field, code, 0) << 3; | |
792 | break; | |
793 | case AARCH64_OPND_QLF_MSL: | |
794 | /* shift ones */ | |
795 | info->shifter.kind = AARCH64_MOD_MSL; | |
796 | gen_sub_field (FLD_cmode, 0, 1, &field); /* per word */ | |
797 | info->shifter.amount = extract_field_2 (&field, code, 0) ? 16 : 8; | |
798 | break; | |
799 | default: | |
78933a4a | 800 | return false; |
a06ea964 NC |
801 | } |
802 | ||
78933a4a | 803 | return true; |
a06ea964 NC |
804 | } |
805 | ||
aa2aa4c6 | 806 | /* Decode an 8-bit floating-point immediate. */ |
78933a4a | 807 | bool |
aa2aa4c6 RS |
808 | aarch64_ext_fpimm (const aarch64_operand *self, aarch64_opnd_info *info, |
809 | const aarch64_insn code, | |
561a72d4 TC |
810 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
811 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
aa2aa4c6 RS |
812 | { |
813 | info->imm.value = extract_all_fields (self, code); | |
814 | info->imm.is_fp = 1; | |
78933a4a | 815 | return true; |
aa2aa4c6 RS |
816 | } |
817 | ||
582e12bf | 818 | /* Decode a 1-bit rotate immediate (#90 or #270). */ |
78933a4a | 819 | bool |
582e12bf RS |
820 | aarch64_ext_imm_rotate1 (const aarch64_operand *self, aarch64_opnd_info *info, |
821 | const aarch64_insn code, | |
561a72d4 TC |
822 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
823 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
c2c4ff8d SN |
824 | { |
825 | uint64_t rot = extract_field (self->fields[0], code, 0); | |
582e12bf RS |
826 | assert (rot < 2U); |
827 | info->imm.value = rot * 180 + 90; | |
78933a4a | 828 | return true; |
582e12bf | 829 | } |
c2c4ff8d | 830 | |
582e12bf | 831 | /* Decode a 2-bit rotate immediate (#0, #90, #180 or #270). */ |
78933a4a | 832 | bool |
582e12bf RS |
833 | aarch64_ext_imm_rotate2 (const aarch64_operand *self, aarch64_opnd_info *info, |
834 | const aarch64_insn code, | |
561a72d4 TC |
835 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
836 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
582e12bf RS |
837 | { |
838 | uint64_t rot = extract_field (self->fields[0], code, 0); | |
839 | assert (rot < 4U); | |
c2c4ff8d | 840 | info->imm.value = rot * 90; |
78933a4a | 841 | return true; |
c2c4ff8d SN |
842 | } |
843 | ||
a06ea964 | 844 | /* Decode scale for e.g. SCVTF <Dd>, <Wn>, #<fbits>. */ |
78933a4a | 845 | bool |
a06ea964 NC |
846 | aarch64_ext_fbits (const aarch64_operand *self ATTRIBUTE_UNUSED, |
847 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
848 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
849 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
850 | { |
851 | info->imm.value = 64- extract_field (FLD_scale, code, 0); | |
78933a4a | 852 | return true; |
a06ea964 NC |
853 | } |
854 | ||
855 | /* Decode arithmetic immediate for e.g. | |
856 | SUBS <Wd>, <Wn|WSP>, #<imm> {, <shift>}. */ | |
78933a4a | 857 | bool |
a06ea964 NC |
858 | aarch64_ext_aimm (const aarch64_operand *self ATTRIBUTE_UNUSED, |
859 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
860 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
861 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
862 | { |
863 | aarch64_insn value; | |
864 | ||
865 | info->shifter.kind = AARCH64_MOD_LSL; | |
866 | /* shift */ | |
867 | value = extract_field (FLD_shift, code, 0); | |
868 | if (value >= 2) | |
78933a4a | 869 | return false; |
a06ea964 NC |
870 | info->shifter.amount = value ? 12 : 0; |
871 | /* imm12 (unsigned) */ | |
872 | info->imm.value = extract_field (FLD_imm12, code, 0); | |
873 | ||
78933a4a | 874 | return true; |
a06ea964 NC |
875 | } |
876 | ||
e950b345 RS |
877 | /* Return true if VALUE is a valid logical immediate encoding, storing the |
878 | decoded value in *RESULT if so. ESIZE is the number of bytes in the | |
879 | decoded immediate. */ | |
78933a4a | 880 | static bool |
e950b345 | 881 | decode_limm (uint32_t esize, aarch64_insn value, int64_t *result) |
a06ea964 NC |
882 | { |
883 | uint64_t imm, mask; | |
a06ea964 NC |
884 | uint32_t N, R, S; |
885 | unsigned simd_size; | |
a06ea964 NC |
886 | |
887 | /* value is N:immr:imms. */ | |
888 | S = value & 0x3f; | |
889 | R = (value >> 6) & 0x3f; | |
890 | N = (value >> 12) & 0x1; | |
891 | ||
a06ea964 NC |
892 | /* The immediate value is S+1 bits to 1, left rotated by SIMDsize - R |
893 | (in other words, right rotated by R), then replicated. */ | |
894 | if (N != 0) | |
895 | { | |
896 | simd_size = 64; | |
897 | mask = 0xffffffffffffffffull; | |
898 | } | |
899 | else | |
900 | { | |
901 | switch (S) | |
902 | { | |
903 | case 0x00 ... 0x1f: /* 0xxxxx */ simd_size = 32; break; | |
904 | case 0x20 ... 0x2f: /* 10xxxx */ simd_size = 16; S &= 0xf; break; | |
905 | case 0x30 ... 0x37: /* 110xxx */ simd_size = 8; S &= 0x7; break; | |
906 | case 0x38 ... 0x3b: /* 1110xx */ simd_size = 4; S &= 0x3; break; | |
907 | case 0x3c ... 0x3d: /* 11110x */ simd_size = 2; S &= 0x1; break; | |
78933a4a | 908 | default: return false; |
a06ea964 NC |
909 | } |
910 | mask = (1ull << simd_size) - 1; | |
911 | /* Top bits are IGNORED. */ | |
912 | R &= simd_size - 1; | |
913 | } | |
e950b345 RS |
914 | |
915 | if (simd_size > esize * 8) | |
78933a4a | 916 | return false; |
e950b345 | 917 | |
a06ea964 NC |
918 | /* NOTE: if S = simd_size - 1 we get 0xf..f which is rejected. */ |
919 | if (S == simd_size - 1) | |
78933a4a | 920 | return false; |
a06ea964 NC |
921 | /* S+1 consecutive bits to 1. */ |
922 | /* NOTE: S can't be 63 due to detection above. */ | |
923 | imm = (1ull << (S + 1)) - 1; | |
924 | /* Rotate to the left by simd_size - R. */ | |
925 | if (R != 0) | |
926 | imm = ((imm << (simd_size - R)) & mask) | (imm >> R); | |
927 | /* Replicate the value according to SIMD size. */ | |
928 | switch (simd_size) | |
929 | { | |
930 | case 2: imm = (imm << 2) | imm; | |
1a0670f3 | 931 | /* Fall through. */ |
a06ea964 | 932 | case 4: imm = (imm << 4) | imm; |
1a0670f3 | 933 | /* Fall through. */ |
a06ea964 | 934 | case 8: imm = (imm << 8) | imm; |
1a0670f3 | 935 | /* Fall through. */ |
a06ea964 | 936 | case 16: imm = (imm << 16) | imm; |
1a0670f3 | 937 | /* Fall through. */ |
a06ea964 | 938 | case 32: imm = (imm << 32) | imm; |
1a0670f3 | 939 | /* Fall through. */ |
a06ea964 | 940 | case 64: break; |
7060c28e | 941 | default: return 0; |
a06ea964 NC |
942 | } |
943 | ||
e950b345 RS |
944 | *result = imm & ~((uint64_t) -1 << (esize * 4) << (esize * 4)); |
945 | ||
78933a4a | 946 | return true; |
e950b345 RS |
947 | } |
948 | ||
949 | /* Decode a logical immediate for e.g. ORR <Wd|WSP>, <Wn>, #<imm>. */ | |
78933a4a | 950 | bool |
e950b345 RS |
951 | aarch64_ext_limm (const aarch64_operand *self, |
952 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
953 | const aarch64_inst *inst, |
954 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
e950b345 RS |
955 | { |
956 | uint32_t esize; | |
957 | aarch64_insn value; | |
958 | ||
959 | value = extract_fields (code, 0, 3, self->fields[0], self->fields[1], | |
960 | self->fields[2]); | |
961 | esize = aarch64_get_qualifier_esize (inst->operands[0].qualifier); | |
962 | return decode_limm (esize, value, &info->imm.value); | |
963 | } | |
a06ea964 | 964 | |
e950b345 | 965 | /* Decode a logical immediate for the BIC alias of AND (etc.). */ |
78933a4a | 966 | bool |
e950b345 RS |
967 | aarch64_ext_inv_limm (const aarch64_operand *self, |
968 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
969 | const aarch64_inst *inst, |
970 | aarch64_operand_error *errors) | |
e950b345 | 971 | { |
561a72d4 | 972 | if (!aarch64_ext_limm (self, info, code, inst, errors)) |
78933a4a | 973 | return false; |
e950b345 | 974 | info->imm.value = ~info->imm.value; |
78933a4a | 975 | return true; |
a06ea964 NC |
976 | } |
977 | ||
978 | /* Decode Ft for e.g. STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}] | |
979 | or LDP <Qt1>, <Qt2>, [<Xn|SP>], #<imm>. */ | |
78933a4a | 980 | bool |
a06ea964 NC |
981 | aarch64_ext_ft (const aarch64_operand *self ATTRIBUTE_UNUSED, |
982 | aarch64_opnd_info *info, | |
561a72d4 TC |
983 | const aarch64_insn code, const aarch64_inst *inst, |
984 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
985 | { |
986 | aarch64_insn value; | |
987 | ||
988 | /* Rt */ | |
989 | info->reg.regno = extract_field (FLD_Rt, code, 0); | |
990 | ||
991 | /* size */ | |
992 | value = extract_field (FLD_ldst_size, code, 0); | |
993 | if (inst->opcode->iclass == ldstpair_indexed | |
994 | || inst->opcode->iclass == ldstnapair_offs | |
995 | || inst->opcode->iclass == ldstpair_off | |
996 | || inst->opcode->iclass == loadlit) | |
997 | { | |
998 | enum aarch64_opnd_qualifier qualifier; | |
999 | switch (value) | |
1000 | { | |
1001 | case 0: qualifier = AARCH64_OPND_QLF_S_S; break; | |
1002 | case 1: qualifier = AARCH64_OPND_QLF_S_D; break; | |
1003 | case 2: qualifier = AARCH64_OPND_QLF_S_Q; break; | |
78933a4a | 1004 | default: return false; |
a06ea964 NC |
1005 | } |
1006 | info->qualifier = qualifier; | |
1007 | } | |
1008 | else | |
1009 | { | |
1010 | /* opc1:size */ | |
1011 | value = extract_fields (code, 0, 2, FLD_opc1, FLD_ldst_size); | |
1012 | if (value > 0x4) | |
78933a4a | 1013 | return false; |
a06ea964 NC |
1014 | info->qualifier = get_sreg_qualifier_from_value (value); |
1015 | } | |
1016 | ||
78933a4a | 1017 | return true; |
a06ea964 NC |
1018 | } |
1019 | ||
1020 | /* Decode the address operand for e.g. STXRB <Ws>, <Wt>, [<Xn|SP>{,#0}]. */ | |
78933a4a | 1021 | bool |
a06ea964 NC |
1022 | aarch64_ext_addr_simple (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1023 | aarch64_opnd_info *info, | |
1024 | aarch64_insn code, | |
561a72d4 TC |
1025 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1026 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1027 | { |
1028 | /* Rn */ | |
1029 | info->addr.base_regno = extract_field (FLD_Rn, code, 0); | |
78933a4a | 1030 | return true; |
a06ea964 NC |
1031 | } |
1032 | ||
f42f1a1d TC |
1033 | /* Decode the address operand for e.g. |
1034 | stlur <Xt>, [<Xn|SP>{, <amount>}]. */ | |
78933a4a | 1035 | bool |
f42f1a1d TC |
1036 | aarch64_ext_addr_offset (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1037 | aarch64_opnd_info *info, | |
561a72d4 TC |
1038 | aarch64_insn code, const aarch64_inst *inst, |
1039 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
f42f1a1d TC |
1040 | { |
1041 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
1042 | ||
1043 | /* Rn */ | |
1044 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
1045 | ||
1046 | /* simm9 */ | |
1047 | aarch64_insn imm = extract_fields (code, 0, 1, self->fields[1]); | |
1048 | info->addr.offset.imm = sign_extend (imm, 8); | |
1049 | if (extract_field (self->fields[2], code, 0) == 1) { | |
1050 | info->addr.writeback = 1; | |
1051 | info->addr.preind = 1; | |
1052 | } | |
78933a4a | 1053 | return true; |
f42f1a1d TC |
1054 | } |
1055 | ||
a06ea964 NC |
1056 | /* Decode the address operand for e.g. |
1057 | STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */ | |
78933a4a | 1058 | bool |
a06ea964 NC |
1059 | aarch64_ext_addr_regoff (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1060 | aarch64_opnd_info *info, | |
561a72d4 TC |
1061 | aarch64_insn code, const aarch64_inst *inst, |
1062 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1063 | { |
1064 | aarch64_insn S, value; | |
1065 | ||
1066 | /* Rn */ | |
1067 | info->addr.base_regno = extract_field (FLD_Rn, code, 0); | |
1068 | /* Rm */ | |
1069 | info->addr.offset.regno = extract_field (FLD_Rm, code, 0); | |
1070 | /* option */ | |
1071 | value = extract_field (FLD_option, code, 0); | |
1072 | info->shifter.kind = | |
78933a4a | 1073 | aarch64_get_operand_modifier_from_value (value, true /* extend_p */); |
a06ea964 NC |
1074 | /* Fix-up the shifter kind; although the table-driven approach is |
1075 | efficient, it is slightly inflexible, thus needing this fix-up. */ | |
1076 | if (info->shifter.kind == AARCH64_MOD_UXTX) | |
1077 | info->shifter.kind = AARCH64_MOD_LSL; | |
1078 | /* S */ | |
1079 | S = extract_field (FLD_S, code, 0); | |
1080 | if (S == 0) | |
1081 | { | |
1082 | info->shifter.amount = 0; | |
1083 | info->shifter.amount_present = 0; | |
1084 | } | |
1085 | else | |
1086 | { | |
1087 | int size; | |
1088 | /* Need information in other operand(s) to help achieve the decoding | |
1089 | from 'S' field. */ | |
1090 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
1091 | /* Get the size of the data element that is accessed, which may be | |
1092 | different from that of the source register size, e.g. in strb/ldrb. */ | |
1093 | size = aarch64_get_qualifier_esize (info->qualifier); | |
1094 | info->shifter.amount = get_logsz (size); | |
1095 | info->shifter.amount_present = 1; | |
1096 | } | |
1097 | ||
78933a4a | 1098 | return true; |
a06ea964 NC |
1099 | } |
1100 | ||
1101 | /* Decode the address operand for e.g. LDRSW <Xt>, [<Xn|SP>], #<simm>. */ | |
78933a4a | 1102 | bool |
a06ea964 | 1103 | aarch64_ext_addr_simm (const aarch64_operand *self, aarch64_opnd_info *info, |
561a72d4 TC |
1104 | aarch64_insn code, const aarch64_inst *inst, |
1105 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1106 | { |
1107 | aarch64_insn imm; | |
1108 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
1109 | ||
1110 | /* Rn */ | |
1111 | info->addr.base_regno = extract_field (FLD_Rn, code, 0); | |
1112 | /* simm (imm9 or imm7) */ | |
1113 | imm = extract_field (self->fields[0], code, 0); | |
1114 | info->addr.offset.imm = sign_extend (imm, fields[self->fields[0]].width - 1); | |
fb3265b3 SD |
1115 | if (self->fields[0] == FLD_imm7 |
1116 | || info->qualifier == AARCH64_OPND_QLF_imm_tag) | |
a06ea964 NC |
1117 | /* scaled immediate in ld/st pair instructions. */ |
1118 | info->addr.offset.imm *= aarch64_get_qualifier_esize (info->qualifier); | |
1119 | /* qualifier */ | |
1120 | if (inst->opcode->iclass == ldst_unscaled | |
1121 | || inst->opcode->iclass == ldstnapair_offs | |
1122 | || inst->opcode->iclass == ldstpair_off | |
1123 | || inst->opcode->iclass == ldst_unpriv) | |
1124 | info->addr.writeback = 0; | |
1125 | else | |
1126 | { | |
1127 | /* pre/post- index */ | |
1128 | info->addr.writeback = 1; | |
1129 | if (extract_field (self->fields[1], code, 0) == 1) | |
1130 | info->addr.preind = 1; | |
1131 | else | |
1132 | info->addr.postind = 1; | |
1133 | } | |
1134 | ||
78933a4a | 1135 | return true; |
a06ea964 NC |
1136 | } |
1137 | ||
1138 | /* Decode the address operand for e.g. LDRSW <Xt>, [<Xn|SP>{, #<simm>}]. */ | |
78933a4a | 1139 | bool |
a06ea964 NC |
1140 | aarch64_ext_addr_uimm12 (const aarch64_operand *self, aarch64_opnd_info *info, |
1141 | aarch64_insn code, | |
561a72d4 TC |
1142 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1143 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1144 | { |
1145 | int shift; | |
1146 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
1147 | shift = get_logsz (aarch64_get_qualifier_esize (info->qualifier)); | |
1148 | /* Rn */ | |
1149 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
1150 | /* uimm12 */ | |
1151 | info->addr.offset.imm = extract_field (self->fields[1], code, 0) << shift; | |
78933a4a | 1152 | return true; |
a06ea964 NC |
1153 | } |
1154 | ||
3f06e550 | 1155 | /* Decode the address operand for e.g. LDRAA <Xt>, [<Xn|SP>{, #<simm>}]. */ |
78933a4a | 1156 | bool |
3f06e550 SN |
1157 | aarch64_ext_addr_simm10 (const aarch64_operand *self, aarch64_opnd_info *info, |
1158 | aarch64_insn code, | |
561a72d4 TC |
1159 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1160 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
3f06e550 SN |
1161 | { |
1162 | aarch64_insn imm; | |
1163 | ||
1164 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
1165 | /* Rn */ | |
1166 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
1167 | /* simm10 */ | |
1168 | imm = extract_fields (code, 0, 2, self->fields[1], self->fields[2]); | |
1169 | info->addr.offset.imm = sign_extend (imm, 9) << 3; | |
1170 | if (extract_field (self->fields[3], code, 0) == 1) { | |
1171 | info->addr.writeback = 1; | |
1172 | info->addr.preind = 1; | |
1173 | } | |
78933a4a | 1174 | return true; |
3f06e550 SN |
1175 | } |
1176 | ||
a06ea964 NC |
1177 | /* Decode the address operand for e.g. |
1178 | LD1 {<Vt>.<T>, <Vt2>.<T>, <Vt3>.<T>}, [<Xn|SP>], <Xm|#<amount>>. */ | |
78933a4a | 1179 | bool |
a06ea964 NC |
1180 | aarch64_ext_simd_addr_post (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1181 | aarch64_opnd_info *info, | |
561a72d4 TC |
1182 | aarch64_insn code, const aarch64_inst *inst, |
1183 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1184 | { |
1185 | /* The opcode dependent area stores the number of elements in | |
1186 | each structure to be loaded/stored. */ | |
1187 | int is_ld1r = get_opcode_dependent_value (inst->opcode) == 1; | |
1188 | ||
1189 | /* Rn */ | |
1190 | info->addr.base_regno = extract_field (FLD_Rn, code, 0); | |
1191 | /* Rm | #<amount> */ | |
1192 | info->addr.offset.regno = extract_field (FLD_Rm, code, 0); | |
1193 | if (info->addr.offset.regno == 31) | |
1194 | { | |
1195 | if (inst->opcode->operands[0] == AARCH64_OPND_LVt_AL) | |
1196 | /* Special handling of loading single structure to all lane. */ | |
1197 | info->addr.offset.imm = (is_ld1r ? 1 | |
1198 | : inst->operands[0].reglist.num_regs) | |
1199 | * aarch64_get_qualifier_esize (inst->operands[0].qualifier); | |
1200 | else | |
1201 | info->addr.offset.imm = inst->operands[0].reglist.num_regs | |
1202 | * aarch64_get_qualifier_esize (inst->operands[0].qualifier) | |
1203 | * aarch64_get_qualifier_nelem (inst->operands[0].qualifier); | |
1204 | } | |
1205 | else | |
1206 | info->addr.offset.is_reg = 1; | |
1207 | info->addr.writeback = 1; | |
1208 | ||
78933a4a | 1209 | return true; |
a06ea964 NC |
1210 | } |
1211 | ||
1212 | /* Decode the condition operand for e.g. CSEL <Xd>, <Xn>, <Xm>, <cond>. */ | |
78933a4a | 1213 | bool |
a06ea964 NC |
1214 | aarch64_ext_cond (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1215 | aarch64_opnd_info *info, | |
561a72d4 TC |
1216 | aarch64_insn code, const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1217 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1218 | { |
1219 | aarch64_insn value; | |
1220 | /* cond */ | |
1221 | value = extract_field (FLD_cond, code, 0); | |
1222 | info->cond = get_cond_from_value (value); | |
78933a4a | 1223 | return true; |
a06ea964 NC |
1224 | } |
1225 | ||
1226 | /* Decode the system register operand for e.g. MRS <Xt>, <systemreg>. */ | |
78933a4a | 1227 | bool |
a06ea964 NC |
1228 | aarch64_ext_sysreg (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1229 | aarch64_opnd_info *info, | |
1230 | aarch64_insn code, | |
561a72d4 TC |
1231 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1232 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1233 | { |
1234 | /* op0:op1:CRn:CRm:op2 */ | |
561a72d4 TC |
1235 | info->sysreg.value = extract_fields (code, 0, 5, FLD_op0, FLD_op1, FLD_CRn, |
1236 | FLD_CRm, FLD_op2); | |
f9830ec1 TC |
1237 | info->sysreg.flags = 0; |
1238 | ||
1239 | /* If a system instruction, check which restrictions should be on the register | |
1240 | value during decoding, these will be enforced then. */ | |
1241 | if (inst->opcode->iclass == ic_system) | |
1242 | { | |
1243 | /* Check to see if it's read-only, else check if it's write only. | |
1244 | if it's both or unspecified don't care. */ | |
1245 | if ((inst->opcode->flags & (F_SYS_READ | F_SYS_WRITE)) == F_SYS_READ) | |
1246 | info->sysreg.flags = F_REG_READ; | |
1247 | else if ((inst->opcode->flags & (F_SYS_READ | F_SYS_WRITE)) | |
1248 | == F_SYS_WRITE) | |
1249 | info->sysreg.flags = F_REG_WRITE; | |
1250 | } | |
1251 | ||
78933a4a | 1252 | return true; |
a06ea964 NC |
1253 | } |
1254 | ||
1255 | /* Decode the PSTATE field operand for e.g. MSR <pstatefield>, #<imm>. */ | |
78933a4a | 1256 | bool |
a06ea964 NC |
1257 | aarch64_ext_pstatefield (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1258 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1259 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1260 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1261 | { |
1262 | int i; | |
3dd032c5 | 1263 | aarch64_insn fld_crm = extract_field (FLD_CRm, code, 0); |
a06ea964 NC |
1264 | /* op1:op2 */ |
1265 | info->pstatefield = extract_fields (code, 0, 2, FLD_op1, FLD_op2); | |
1266 | for (i = 0; aarch64_pstatefields[i].name != NULL; ++i) | |
1267 | if (aarch64_pstatefields[i].value == (aarch64_insn)info->pstatefield) | |
3dd032c5 PW |
1268 | { |
1269 | /* PSTATEFIELD name can be encoded partially in CRm[3:1]. */ | |
1270 | uint32_t flags = aarch64_pstatefields[i].flags; | |
1271 | if ((flags & F_REG_IN_CRM) | |
1272 | && ((fld_crm & 0xe) != PSTATE_DECODE_CRM (flags))) | |
1273 | continue; | |
1274 | info->sysreg.flags = flags; | |
1275 | return true; | |
1276 | } | |
a06ea964 | 1277 | /* Reserved value in <pstatefield>. */ |
78933a4a | 1278 | return false; |
a06ea964 NC |
1279 | } |
1280 | ||
1281 | /* Decode the system instruction op operand for e.g. AT <at_op>, <Xt>. */ | |
78933a4a | 1282 | bool |
a06ea964 NC |
1283 | aarch64_ext_sysins_op (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1284 | aarch64_opnd_info *info, | |
1285 | aarch64_insn code, | |
561a72d4 TC |
1286 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1287 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1288 | { |
1289 | int i; | |
1290 | aarch64_insn value; | |
1291 | const aarch64_sys_ins_reg *sysins_ops; | |
1292 | /* op0:op1:CRn:CRm:op2 */ | |
1293 | value = extract_fields (code, 0, 5, | |
1294 | FLD_op0, FLD_op1, FLD_CRn, | |
1295 | FLD_CRm, FLD_op2); | |
1296 | ||
1297 | switch (info->type) | |
1298 | { | |
1299 | case AARCH64_OPND_SYSREG_AT: sysins_ops = aarch64_sys_regs_at; break; | |
1300 | case AARCH64_OPND_SYSREG_DC: sysins_ops = aarch64_sys_regs_dc; break; | |
1301 | case AARCH64_OPND_SYSREG_IC: sysins_ops = aarch64_sys_regs_ic; break; | |
1302 | case AARCH64_OPND_SYSREG_TLBI: sysins_ops = aarch64_sys_regs_tlbi; break; | |
2ac435d4 SD |
1303 | case AARCH64_OPND_SYSREG_SR: |
1304 | sysins_ops = aarch64_sys_regs_sr; | |
1305 | /* Let's remove op2 for rctx. Refer to comments in the definition of | |
1306 | aarch64_sys_regs_sr[]. */ | |
1307 | value = value & ~(0x7); | |
1308 | break; | |
7060c28e | 1309 | default: return false; |
a06ea964 NC |
1310 | } |
1311 | ||
875880c6 | 1312 | for (i = 0; sysins_ops[i].name != NULL; ++i) |
a06ea964 NC |
1313 | if (sysins_ops[i].value == value) |
1314 | { | |
1315 | info->sysins_op = sysins_ops + i; | |
1316 | DEBUG_TRACE ("%s found value: %x, has_xt: %d, i: %d.", | |
875880c6 | 1317 | info->sysins_op->name, |
a06ea964 | 1318 | (unsigned)info->sysins_op->value, |
ea2deeec | 1319 | aarch64_sys_ins_reg_has_xt (info->sysins_op), i); |
78933a4a | 1320 | return true; |
a06ea964 NC |
1321 | } |
1322 | ||
78933a4a | 1323 | return false; |
a06ea964 NC |
1324 | } |
1325 | ||
1326 | /* Decode the memory barrier option operand for e.g. DMB <option>|#<imm>. */ | |
1327 | ||
78933a4a | 1328 | bool |
a06ea964 NC |
1329 | aarch64_ext_barrier (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1330 | aarch64_opnd_info *info, | |
1331 | aarch64_insn code, | |
561a72d4 TC |
1332 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1333 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1334 | { |
1335 | /* CRm */ | |
1336 | info->barrier = aarch64_barrier_options + extract_field (FLD_CRm, code, 0); | |
78933a4a | 1337 | return true; |
a06ea964 NC |
1338 | } |
1339 | ||
fd195909 PW |
1340 | /* Decode the memory barrier option operand for DSB <option>nXS|#<imm>. */ |
1341 | ||
78933a4a | 1342 | bool |
fd195909 PW |
1343 | aarch64_ext_barrier_dsb_nxs (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1344 | aarch64_opnd_info *info, | |
1345 | aarch64_insn code, | |
1346 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
1347 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
1348 | { | |
1349 | /* For the DSB nXS barrier variant immediate is encoded in 2-bit field. */ | |
1350 | aarch64_insn field = extract_field (FLD_CRm_dsb_nxs, code, 0); | |
1351 | info->barrier = aarch64_barrier_dsb_nxs_options + field; | |
78933a4a | 1352 | return true; |
fd195909 PW |
1353 | } |
1354 | ||
a06ea964 NC |
1355 | /* Decode the prefetch operation option operand for e.g. |
1356 | PRFM <prfop>, [<Xn|SP>{, #<pimm>}]. */ | |
1357 | ||
78933a4a | 1358 | bool |
a06ea964 NC |
1359 | aarch64_ext_prfop (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1360 | aarch64_opnd_info *info, | |
561a72d4 TC |
1361 | aarch64_insn code, const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1362 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1363 | { |
1364 | /* prfop in Rt */ | |
1365 | info->prfop = aarch64_prfops + extract_field (FLD_Rt, code, 0); | |
78933a4a | 1366 | return true; |
a06ea964 NC |
1367 | } |
1368 | ||
9ed608f9 MW |
1369 | /* Decode the hint number for an alias taking an operand. Set info->hint_option |
1370 | to the matching name/value pair in aarch64_hint_options. */ | |
1371 | ||
78933a4a | 1372 | bool |
9ed608f9 MW |
1373 | aarch64_ext_hint (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1374 | aarch64_opnd_info *info, | |
1375 | aarch64_insn code, | |
561a72d4 TC |
1376 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1377 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
9ed608f9 MW |
1378 | { |
1379 | /* CRm:op2. */ | |
1380 | unsigned hint_number; | |
1381 | int i; | |
1382 | ||
1383 | hint_number = extract_fields (code, 0, 2, FLD_CRm, FLD_op2); | |
1384 | ||
1385 | for (i = 0; aarch64_hint_options[i].name != NULL; i++) | |
1386 | { | |
ff605452 | 1387 | if (hint_number == HINT_VAL (aarch64_hint_options[i].value)) |
9ed608f9 MW |
1388 | { |
1389 | info->hint_option = &(aarch64_hint_options[i]); | |
78933a4a | 1390 | return true; |
9ed608f9 MW |
1391 | } |
1392 | } | |
1393 | ||
78933a4a | 1394 | return false; |
9ed608f9 MW |
1395 | } |
1396 | ||
a06ea964 NC |
1397 | /* Decode the extended register operand for e.g. |
1398 | STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */ | |
78933a4a | 1399 | bool |
a06ea964 NC |
1400 | aarch64_ext_reg_extended (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1401 | aarch64_opnd_info *info, | |
1402 | aarch64_insn code, | |
561a72d4 TC |
1403 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1404 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1405 | { |
1406 | aarch64_insn value; | |
1407 | ||
1408 | /* Rm */ | |
1409 | info->reg.regno = extract_field (FLD_Rm, code, 0); | |
1410 | /* option */ | |
1411 | value = extract_field (FLD_option, code, 0); | |
1412 | info->shifter.kind = | |
78933a4a | 1413 | aarch64_get_operand_modifier_from_value (value, true /* extend_p */); |
a06ea964 | 1414 | /* imm3 */ |
abd542a2 | 1415 | info->shifter.amount = extract_field (FLD_imm3_10, code, 0); |
a06ea964 NC |
1416 | |
1417 | /* This makes the constraint checking happy. */ | |
1418 | info->shifter.operator_present = 1; | |
1419 | ||
1420 | /* Assume inst->operands[0].qualifier has been resolved. */ | |
1421 | assert (inst->operands[0].qualifier != AARCH64_OPND_QLF_NIL); | |
1422 | info->qualifier = AARCH64_OPND_QLF_W; | |
1423 | if (inst->operands[0].qualifier == AARCH64_OPND_QLF_X | |
1424 | && (info->shifter.kind == AARCH64_MOD_UXTX | |
1425 | || info->shifter.kind == AARCH64_MOD_SXTX)) | |
1426 | info->qualifier = AARCH64_OPND_QLF_X; | |
1427 | ||
78933a4a | 1428 | return true; |
a06ea964 NC |
1429 | } |
1430 | ||
1431 | /* Decode the shifted register operand for e.g. | |
1432 | SUBS <Xd>, <Xn>, <Xm> {, <shift> #<amount>}. */ | |
78933a4a | 1433 | bool |
a06ea964 NC |
1434 | aarch64_ext_reg_shifted (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1435 | aarch64_opnd_info *info, | |
1436 | aarch64_insn code, | |
561a72d4 TC |
1437 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1438 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1439 | { |
1440 | aarch64_insn value; | |
1441 | ||
1442 | /* Rm */ | |
1443 | info->reg.regno = extract_field (FLD_Rm, code, 0); | |
1444 | /* shift */ | |
1445 | value = extract_field (FLD_shift, code, 0); | |
1446 | info->shifter.kind = | |
78933a4a | 1447 | aarch64_get_operand_modifier_from_value (value, false /* extend_p */); |
a06ea964 NC |
1448 | if (info->shifter.kind == AARCH64_MOD_ROR |
1449 | && inst->opcode->iclass != log_shift) | |
1450 | /* ROR is not available for the shifted register operand in arithmetic | |
1451 | instructions. */ | |
78933a4a | 1452 | return false; |
a06ea964 | 1453 | /* imm6 */ |
1d106042 | 1454 | info->shifter.amount = extract_field (FLD_imm6_10, code, 0); |
a06ea964 NC |
1455 | |
1456 | /* This makes the constraint checking happy. */ | |
1457 | info->shifter.operator_present = 1; | |
1458 | ||
78933a4a | 1459 | return true; |
a06ea964 | 1460 | } |
f11ad6bc | 1461 | |
98907a70 RS |
1462 | /* Decode an SVE address [<base>, #<offset>*<factor>, MUL VL], |
1463 | where <offset> is given by the OFFSET parameter and where <factor> is | |
1464 | 1 plus SELF's operand-dependent value. fields[0] specifies the field | |
1465 | that holds <base>. */ | |
78933a4a | 1466 | static bool |
98907a70 RS |
1467 | aarch64_ext_sve_addr_reg_mul_vl (const aarch64_operand *self, |
1468 | aarch64_opnd_info *info, aarch64_insn code, | |
1469 | int64_t offset) | |
1470 | { | |
1471 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
1472 | info->addr.offset.imm = offset * (1 + get_operand_specific_data (self)); | |
78933a4a AM |
1473 | info->addr.offset.is_reg = false; |
1474 | info->addr.writeback = false; | |
1475 | info->addr.preind = true; | |
98907a70 RS |
1476 | if (offset != 0) |
1477 | info->shifter.kind = AARCH64_MOD_MUL_VL; | |
1478 | info->shifter.amount = 1; | |
1479 | info->shifter.operator_present = (info->addr.offset.imm != 0); | |
78933a4a AM |
1480 | info->shifter.amount_present = false; |
1481 | return true; | |
98907a70 RS |
1482 | } |
1483 | ||
1484 | /* Decode an SVE address [<base>, #<simm4>*<factor>, MUL VL], | |
1485 | where <simm4> is a 4-bit signed value and where <factor> is 1 plus | |
1486 | SELF's operand-dependent value. fields[0] specifies the field that | |
1487 | holds <base>. <simm4> is encoded in the SVE_imm4 field. */ | |
78933a4a | 1488 | bool |
98907a70 RS |
1489 | aarch64_ext_sve_addr_ri_s4xvl (const aarch64_operand *self, |
1490 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1491 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1492 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
98907a70 RS |
1493 | { |
1494 | int offset; | |
1495 | ||
1496 | offset = extract_field (FLD_SVE_imm4, code, 0); | |
1497 | offset = ((offset + 8) & 15) - 8; | |
1498 | return aarch64_ext_sve_addr_reg_mul_vl (self, info, code, offset); | |
1499 | } | |
1500 | ||
1501 | /* Decode an SVE address [<base>, #<simm6>*<factor>, MUL VL], | |
1502 | where <simm6> is a 6-bit signed value and where <factor> is 1 plus | |
1503 | SELF's operand-dependent value. fields[0] specifies the field that | |
1504 | holds <base>. <simm6> is encoded in the SVE_imm6 field. */ | |
78933a4a | 1505 | bool |
98907a70 RS |
1506 | aarch64_ext_sve_addr_ri_s6xvl (const aarch64_operand *self, |
1507 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1508 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1509 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
98907a70 RS |
1510 | { |
1511 | int offset; | |
1512 | ||
1513 | offset = extract_field (FLD_SVE_imm6, code, 0); | |
1514 | offset = (((offset + 32) & 63) - 32); | |
1515 | return aarch64_ext_sve_addr_reg_mul_vl (self, info, code, offset); | |
1516 | } | |
1517 | ||
1518 | /* Decode an SVE address [<base>, #<simm9>*<factor>, MUL VL], | |
1519 | where <simm9> is a 9-bit signed value and where <factor> is 1 plus | |
1520 | SELF's operand-dependent value. fields[0] specifies the field that | |
1521 | holds <base>. <simm9> is encoded in the concatenation of the SVE_imm6 | |
1522 | and imm3 fields, with imm3 being the less-significant part. */ | |
78933a4a | 1523 | bool |
98907a70 RS |
1524 | aarch64_ext_sve_addr_ri_s9xvl (const aarch64_operand *self, |
1525 | aarch64_opnd_info *info, | |
1526 | aarch64_insn code, | |
561a72d4 TC |
1527 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1528 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
98907a70 RS |
1529 | { |
1530 | int offset; | |
1531 | ||
abd542a2 | 1532 | offset = extract_fields (code, 0, 2, FLD_SVE_imm6, FLD_imm3_10); |
98907a70 RS |
1533 | offset = (((offset + 256) & 511) - 256); |
1534 | return aarch64_ext_sve_addr_reg_mul_vl (self, info, code, offset); | |
1535 | } | |
1536 | ||
4df068de RS |
1537 | /* Decode an SVE address [<base>, #<offset> << <shift>], where <offset> |
1538 | is given by the OFFSET parameter and where <shift> is SELF's operand- | |
1539 | dependent value. fields[0] specifies the base register field <base>. */ | |
78933a4a | 1540 | static bool |
4df068de RS |
1541 | aarch64_ext_sve_addr_reg_imm (const aarch64_operand *self, |
1542 | aarch64_opnd_info *info, aarch64_insn code, | |
1543 | int64_t offset) | |
1544 | { | |
1545 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
1546 | info->addr.offset.imm = offset * (1 << get_operand_specific_data (self)); | |
78933a4a AM |
1547 | info->addr.offset.is_reg = false; |
1548 | info->addr.writeback = false; | |
1549 | info->addr.preind = true; | |
1550 | info->shifter.operator_present = false; | |
1551 | info->shifter.amount_present = false; | |
1552 | return true; | |
4df068de RS |
1553 | } |
1554 | ||
582e12bf RS |
1555 | /* Decode an SVE address [X<n>, #<SVE_imm4> << <shift>], where <SVE_imm4> |
1556 | is a 4-bit signed number and where <shift> is SELF's operand-dependent | |
1557 | value. fields[0] specifies the base register field. */ | |
78933a4a | 1558 | bool |
582e12bf RS |
1559 | aarch64_ext_sve_addr_ri_s4 (const aarch64_operand *self, |
1560 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1561 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1562 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
582e12bf RS |
1563 | { |
1564 | int offset = sign_extend (extract_field (FLD_SVE_imm4, code, 0), 3); | |
1565 | return aarch64_ext_sve_addr_reg_imm (self, info, code, offset); | |
1566 | } | |
1567 | ||
4df068de RS |
1568 | /* Decode an SVE address [X<n>, #<SVE_imm6> << <shift>], where <SVE_imm6> |
1569 | is a 6-bit unsigned number and where <shift> is SELF's operand-dependent | |
1570 | value. fields[0] specifies the base register field. */ | |
78933a4a | 1571 | bool |
4df068de RS |
1572 | aarch64_ext_sve_addr_ri_u6 (const aarch64_operand *self, |
1573 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1574 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1575 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
4df068de RS |
1576 | { |
1577 | int offset = extract_field (FLD_SVE_imm6, code, 0); | |
1578 | return aarch64_ext_sve_addr_reg_imm (self, info, code, offset); | |
1579 | } | |
1580 | ||
1581 | /* Decode an SVE address [X<n>, X<m>{, LSL #<shift>}], where <shift> | |
1582 | is SELF's operand-dependent value. fields[0] specifies the base | |
1583 | register field and fields[1] specifies the offset register field. */ | |
78933a4a | 1584 | bool |
4df068de RS |
1585 | aarch64_ext_sve_addr_rr_lsl (const aarch64_operand *self, |
1586 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1587 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1588 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
4df068de | 1589 | { |
eaf02703 | 1590 | int index_regno; |
4df068de | 1591 | |
eaf02703 MR |
1592 | index_regno = extract_field (self->fields[1], code, 0); |
1593 | if (index_regno == 31 && (self->flags & OPD_F_NO_ZR) != 0) | |
78933a4a | 1594 | return false; |
4df068de RS |
1595 | |
1596 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
eaf02703 | 1597 | info->addr.offset.regno = index_regno; |
78933a4a AM |
1598 | info->addr.offset.is_reg = true; |
1599 | info->addr.writeback = false; | |
1600 | info->addr.preind = true; | |
4df068de RS |
1601 | info->shifter.kind = AARCH64_MOD_LSL; |
1602 | info->shifter.amount = get_operand_specific_data (self); | |
1603 | info->shifter.operator_present = (info->shifter.amount != 0); | |
1604 | info->shifter.amount_present = (info->shifter.amount != 0); | |
78933a4a | 1605 | return true; |
4df068de RS |
1606 | } |
1607 | ||
1608 | /* Decode an SVE address [X<n>, Z<m>.<T>, (S|U)XTW {#<shift>}], where | |
1609 | <shift> is SELF's operand-dependent value. fields[0] specifies the | |
1610 | base register field, fields[1] specifies the offset register field and | |
1611 | fields[2] is a single-bit field that selects SXTW over UXTW. */ | |
78933a4a | 1612 | bool |
4df068de RS |
1613 | aarch64_ext_sve_addr_rz_xtw (const aarch64_operand *self, |
1614 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1615 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1616 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
4df068de RS |
1617 | { |
1618 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
1619 | info->addr.offset.regno = extract_field (self->fields[1], code, 0); | |
78933a4a AM |
1620 | info->addr.offset.is_reg = true; |
1621 | info->addr.writeback = false; | |
1622 | info->addr.preind = true; | |
4df068de RS |
1623 | if (extract_field (self->fields[2], code, 0)) |
1624 | info->shifter.kind = AARCH64_MOD_SXTW; | |
1625 | else | |
1626 | info->shifter.kind = AARCH64_MOD_UXTW; | |
1627 | info->shifter.amount = get_operand_specific_data (self); | |
78933a4a | 1628 | info->shifter.operator_present = true; |
4df068de | 1629 | info->shifter.amount_present = (info->shifter.amount != 0); |
78933a4a | 1630 | return true; |
4df068de RS |
1631 | } |
1632 | ||
1633 | /* Decode an SVE address [Z<n>.<T>, #<imm5> << <shift>], where <imm5> is a | |
1634 | 5-bit unsigned number and where <shift> is SELF's operand-dependent value. | |
1635 | fields[0] specifies the base register field. */ | |
78933a4a | 1636 | bool |
4df068de RS |
1637 | aarch64_ext_sve_addr_zi_u5 (const aarch64_operand *self, |
1638 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1639 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1640 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
4df068de RS |
1641 | { |
1642 | int offset = extract_field (FLD_imm5, code, 0); | |
1643 | return aarch64_ext_sve_addr_reg_imm (self, info, code, offset); | |
1644 | } | |
1645 | ||
1646 | /* Decode an SVE address [Z<n>.<T>, Z<m>.<T>{, <modifier> {#<msz>}}], | |
1647 | where <modifier> is given by KIND and where <msz> is a 2-bit unsigned | |
1648 | number. fields[0] specifies the base register field and fields[1] | |
1649 | specifies the offset register field. */ | |
78933a4a | 1650 | static bool |
4df068de RS |
1651 | aarch64_ext_sve_addr_zz (const aarch64_operand *self, aarch64_opnd_info *info, |
1652 | aarch64_insn code, enum aarch64_modifier_kind kind) | |
1653 | { | |
1654 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
1655 | info->addr.offset.regno = extract_field (self->fields[1], code, 0); | |
78933a4a AM |
1656 | info->addr.offset.is_reg = true; |
1657 | info->addr.writeback = false; | |
1658 | info->addr.preind = true; | |
4df068de RS |
1659 | info->shifter.kind = kind; |
1660 | info->shifter.amount = extract_field (FLD_SVE_msz, code, 0); | |
1661 | info->shifter.operator_present = (kind != AARCH64_MOD_LSL | |
1662 | || info->shifter.amount != 0); | |
1663 | info->shifter.amount_present = (info->shifter.amount != 0); | |
78933a4a | 1664 | return true; |
4df068de RS |
1665 | } |
1666 | ||
1667 | /* Decode an SVE address [Z<n>.<T>, Z<m>.<T>{, LSL #<msz>}], where | |
1668 | <msz> is a 2-bit unsigned number. fields[0] specifies the base register | |
1669 | field and fields[1] specifies the offset register field. */ | |
78933a4a | 1670 | bool |
4df068de RS |
1671 | aarch64_ext_sve_addr_zz_lsl (const aarch64_operand *self, |
1672 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1673 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1674 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
4df068de RS |
1675 | { |
1676 | return aarch64_ext_sve_addr_zz (self, info, code, AARCH64_MOD_LSL); | |
1677 | } | |
1678 | ||
1679 | /* Decode an SVE address [Z<n>.<T>, Z<m>.<T>, SXTW {#<msz>}], where | |
1680 | <msz> is a 2-bit unsigned number. fields[0] specifies the base register | |
1681 | field and fields[1] specifies the offset register field. */ | |
78933a4a | 1682 | bool |
4df068de RS |
1683 | aarch64_ext_sve_addr_zz_sxtw (const aarch64_operand *self, |
1684 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1685 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1686 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
4df068de RS |
1687 | { |
1688 | return aarch64_ext_sve_addr_zz (self, info, code, AARCH64_MOD_SXTW); | |
1689 | } | |
1690 | ||
1691 | /* Decode an SVE address [Z<n>.<T>, Z<m>.<T>, UXTW {#<msz>}], where | |
1692 | <msz> is a 2-bit unsigned number. fields[0] specifies the base register | |
1693 | field and fields[1] specifies the offset register field. */ | |
78933a4a | 1694 | bool |
4df068de RS |
1695 | aarch64_ext_sve_addr_zz_uxtw (const aarch64_operand *self, |
1696 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1697 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1698 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
4df068de RS |
1699 | { |
1700 | return aarch64_ext_sve_addr_zz (self, info, code, AARCH64_MOD_UXTW); | |
1701 | } | |
1702 | ||
e950b345 RS |
1703 | /* Finish decoding an SVE arithmetic immediate, given that INFO already |
1704 | has the raw field value and that the low 8 bits decode to VALUE. */ | |
78933a4a | 1705 | static bool |
e950b345 RS |
1706 | decode_sve_aimm (aarch64_opnd_info *info, int64_t value) |
1707 | { | |
1708 | info->shifter.kind = AARCH64_MOD_LSL; | |
1709 | info->shifter.amount = 0; | |
1710 | if (info->imm.value & 0x100) | |
1711 | { | |
1712 | if (value == 0) | |
1713 | /* Decode 0x100 as #0, LSL #8. */ | |
1714 | info->shifter.amount = 8; | |
1715 | else | |
1716 | value *= 256; | |
1717 | } | |
1718 | info->shifter.operator_present = (info->shifter.amount != 0); | |
1719 | info->shifter.amount_present = (info->shifter.amount != 0); | |
1720 | info->imm.value = value; | |
78933a4a | 1721 | return true; |
e950b345 RS |
1722 | } |
1723 | ||
1724 | /* Decode an SVE ADD/SUB immediate. */ | |
78933a4a | 1725 | bool |
e950b345 RS |
1726 | aarch64_ext_sve_aimm (const aarch64_operand *self, |
1727 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
1728 | const aarch64_inst *inst, |
1729 | aarch64_operand_error *errors) | |
e950b345 | 1730 | { |
561a72d4 | 1731 | return (aarch64_ext_imm (self, info, code, inst, errors) |
e950b345 RS |
1732 | && decode_sve_aimm (info, (uint8_t) info->imm.value)); |
1733 | } | |
1734 | ||
d8773a8a RS |
1735 | bool |
1736 | aarch64_ext_sve_aligned_reglist (const aarch64_operand *self, | |
1737 | aarch64_opnd_info *info, aarch64_insn code, | |
1738 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
1739 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
1740 | { | |
1741 | unsigned int num_regs = get_operand_specific_data (self); | |
1742 | unsigned int val = extract_field (self->fields[0], code, 0); | |
1743 | info->reglist.first_regno = val * num_regs; | |
1744 | info->reglist.num_regs = num_regs; | |
1745 | info->reglist.stride = 1; | |
1746 | return true; | |
1747 | } | |
1748 | ||
e950b345 | 1749 | /* Decode an SVE CPY/DUP immediate. */ |
78933a4a | 1750 | bool |
e950b345 RS |
1751 | aarch64_ext_sve_asimm (const aarch64_operand *self, |
1752 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
1753 | const aarch64_inst *inst, |
1754 | aarch64_operand_error *errors) | |
e950b345 | 1755 | { |
561a72d4 | 1756 | return (aarch64_ext_imm (self, info, code, inst, errors) |
e950b345 RS |
1757 | && decode_sve_aimm (info, (int8_t) info->imm.value)); |
1758 | } | |
1759 | ||
165d4950 RS |
1760 | /* Decode a single-bit immediate that selects between #0.5 and #1.0. |
1761 | The fields array specifies which field to use. */ | |
78933a4a | 1762 | bool |
165d4950 RS |
1763 | aarch64_ext_sve_float_half_one (const aarch64_operand *self, |
1764 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1765 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1766 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
165d4950 RS |
1767 | { |
1768 | if (extract_field (self->fields[0], code, 0)) | |
1769 | info->imm.value = 0x3f800000; | |
1770 | else | |
1771 | info->imm.value = 0x3f000000; | |
78933a4a AM |
1772 | info->imm.is_fp = true; |
1773 | return true; | |
165d4950 RS |
1774 | } |
1775 | ||
1776 | /* Decode a single-bit immediate that selects between #0.5 and #2.0. | |
1777 | The fields array specifies which field to use. */ | |
78933a4a | 1778 | bool |
165d4950 RS |
1779 | aarch64_ext_sve_float_half_two (const aarch64_operand *self, |
1780 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1781 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1782 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
165d4950 RS |
1783 | { |
1784 | if (extract_field (self->fields[0], code, 0)) | |
1785 | info->imm.value = 0x40000000; | |
1786 | else | |
1787 | info->imm.value = 0x3f000000; | |
78933a4a AM |
1788 | info->imm.is_fp = true; |
1789 | return true; | |
165d4950 RS |
1790 | } |
1791 | ||
1792 | /* Decode a single-bit immediate that selects between #0.0 and #1.0. | |
1793 | The fields array specifies which field to use. */ | |
78933a4a | 1794 | bool |
165d4950 RS |
1795 | aarch64_ext_sve_float_zero_one (const aarch64_operand *self, |
1796 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1797 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1798 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
165d4950 RS |
1799 | { |
1800 | if (extract_field (self->fields[0], code, 0)) | |
1801 | info->imm.value = 0x3f800000; | |
1802 | else | |
1803 | info->imm.value = 0x0; | |
78933a4a AM |
1804 | info->imm.is_fp = true; |
1805 | return true; | |
165d4950 RS |
1806 | } |
1807 | ||
7bb5f07c PW |
1808 | /* Decode ZA tile vector, vector indicator, vector selector, qualifier and |
1809 | immediate on numerous SME instruction fields such as MOVA. */ | |
1810 | bool | |
1811 | aarch64_ext_sme_za_hv_tiles (const aarch64_operand *self, | |
1812 | aarch64_opnd_info *info, aarch64_insn code, | |
1813 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
1814 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
1815 | { | |
1816 | int fld_size = extract_field (self->fields[0], code, 0); | |
1817 | int fld_q = extract_field (self->fields[1], code, 0); | |
1818 | int fld_v = extract_field (self->fields[2], code, 0); | |
1819 | int fld_rv = extract_field (self->fields[3], code, 0); | |
1820 | int fld_zan_imm = extract_field (self->fields[4], code, 0); | |
1821 | ||
1822 | /* Deduce qualifier encoded in size and Q fields. */ | |
1823 | if (fld_size == 0) | |
7bb5f07c | 1824 | { |
575c497a RS |
1825 | info->indexed_za.regno = 0; |
1826 | info->indexed_za.index.imm = fld_zan_imm; | |
a5791d58 RS |
1827 | } |
1828 | else if (fld_size == 1) | |
1829 | { | |
575c497a RS |
1830 | info->indexed_za.regno = fld_zan_imm >> 3; |
1831 | info->indexed_za.index.imm = fld_zan_imm & 0x07; | |
a5791d58 RS |
1832 | } |
1833 | else if (fld_size == 2) | |
1834 | { | |
575c497a RS |
1835 | info->indexed_za.regno = fld_zan_imm >> 2; |
1836 | info->indexed_za.index.imm = fld_zan_imm & 0x03; | |
a5791d58 RS |
1837 | } |
1838 | else if (fld_size == 3 && fld_q == 0) | |
1839 | { | |
575c497a RS |
1840 | info->indexed_za.regno = fld_zan_imm >> 1; |
1841 | info->indexed_za.index.imm = fld_zan_imm & 0x01; | |
a5791d58 RS |
1842 | } |
1843 | else if (fld_size == 3 && fld_q == 1) | |
1844 | { | |
575c497a RS |
1845 | info->indexed_za.regno = fld_zan_imm; |
1846 | info->indexed_za.index.imm = 0; | |
7bb5f07c | 1847 | } |
a5791d58 RS |
1848 | else |
1849 | return false; | |
1850 | ||
575c497a RS |
1851 | info->indexed_za.index.regno = fld_rv + 12; |
1852 | info->indexed_za.v = fld_v; | |
7bb5f07c PW |
1853 | |
1854 | return true; | |
1855 | } | |
1856 | ||
d8773a8a RS |
1857 | bool |
1858 | aarch64_ext_sme_za_hv_tiles_range (const aarch64_operand *self, | |
1859 | aarch64_opnd_info *info, aarch64_insn code, | |
1860 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
1861 | aarch64_operand_error *errors | |
1862 | ATTRIBUTE_UNUSED) | |
1863 | { | |
1864 | int ebytes = aarch64_get_qualifier_esize (info->qualifier); | |
1865 | int range_size = get_opcode_dependent_value (inst->opcode); | |
1866 | int fld_v = extract_field (self->fields[0], code, 0); | |
1867 | int fld_rv = extract_field (self->fields[1], code, 0); | |
1868 | int fld_zan_imm = extract_field (self->fields[2], code, 0); | |
1869 | int max_value = 16 / range_size / ebytes; | |
1870 | ||
1871 | if (max_value == 0) | |
1872 | max_value = 1; | |
1873 | ||
1874 | int regno = fld_zan_imm / max_value; | |
1875 | if (regno >= ebytes) | |
1876 | return false; | |
1877 | ||
1878 | info->indexed_za.regno = regno; | |
1879 | info->indexed_za.index.imm = (fld_zan_imm % max_value) * range_size; | |
1880 | info->indexed_za.index.countm1 = range_size - 1; | |
1881 | info->indexed_za.index.regno = fld_rv + 12; | |
1882 | info->indexed_za.v = fld_v; | |
1883 | ||
1884 | return true; | |
1885 | } | |
1886 | ||
01a4d082 PW |
1887 | /* Decode in SME instruction ZERO list of up to eight 64-bit element tile names |
1888 | separated by commas, encoded in the "imm8" field. | |
1889 | ||
1890 | For programmer convenience an assembler must also accept the names of | |
1891 | 32-bit, 16-bit and 8-bit element tiles which are converted into the | |
1892 | corresponding set of 64-bit element tiles. | |
1893 | */ | |
1894 | bool | |
1895 | aarch64_ext_sme_za_list (const aarch64_operand *self, | |
1896 | aarch64_opnd_info *info, aarch64_insn code, | |
1897 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
1898 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
1899 | { | |
1900 | int mask = extract_field (self->fields[0], code, 0); | |
1901 | info->imm.value = mask; | |
1902 | return true; | |
1903 | } | |
1904 | ||
1905 | /* Decode ZA array vector select register (Rv field), optional vector and | |
1d106042 | 1906 | memory offset (imm4_11 field). |
01a4d082 PW |
1907 | */ |
1908 | bool | |
1909 | aarch64_ext_sme_za_array (const aarch64_operand *self, | |
1910 | aarch64_opnd_info *info, aarch64_insn code, | |
ed429b33 | 1911 | const aarch64_inst *inst, |
01a4d082 PW |
1912 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
1913 | { | |
d8773a8a RS |
1914 | int regno = extract_field (self->fields[0], code, 0); |
1915 | if (info->type == AARCH64_OPND_SME_ZA_array_off4) | |
1916 | regno += 12; | |
1917 | else | |
1918 | regno += 8; | |
01a4d082 | 1919 | int imm = extract_field (self->fields[1], code, 0); |
ed429b33 RS |
1920 | int num_offsets = get_operand_specific_data (self); |
1921 | if (num_offsets == 0) | |
1922 | num_offsets = 1; | |
575c497a | 1923 | info->indexed_za.index.regno = regno; |
ed429b33 RS |
1924 | info->indexed_za.index.imm = imm * num_offsets; |
1925 | info->indexed_za.index.countm1 = num_offsets - 1; | |
d8773a8a | 1926 | info->indexed_za.group_size = get_opcode_dependent_value (inst->opcode); |
01a4d082 PW |
1927 | return true; |
1928 | } | |
1929 | ||
1930 | bool | |
1931 | aarch64_ext_sme_addr_ri_u4xvl (const aarch64_operand *self, | |
1932 | aarch64_opnd_info *info, aarch64_insn code, | |
1933 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
1934 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
1935 | { | |
1936 | int regno = extract_field (self->fields[0], code, 0); | |
1937 | int imm = extract_field (self->fields[1], code, 0); | |
1938 | info->addr.base_regno = regno; | |
1939 | info->addr.offset.imm = imm; | |
1940 | /* MUL VL operator is always present for this operand. */ | |
1941 | info->shifter.kind = AARCH64_MOD_MUL_VL; | |
1942 | info->shifter.operator_present = (imm != 0); | |
1943 | return true; | |
1944 | } | |
1945 | ||
3dd032c5 PW |
1946 | /* Decode {SM|ZA} filed for SMSTART and SMSTOP instructions. */ |
1947 | bool | |
1948 | aarch64_ext_sme_sm_za (const aarch64_operand *self, | |
1949 | aarch64_opnd_info *info, aarch64_insn code, | |
1950 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
1951 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
1952 | { | |
1953 | info->pstatefield = 0x1b; | |
1954 | aarch64_insn fld_crm = extract_field (self->fields[0], code, 0); | |
1955 | fld_crm >>= 1; /* CRm[3:1]. */ | |
1956 | ||
1957 | if (fld_crm == 0x1) | |
1958 | info->reg.regno = 's'; | |
1959 | else if (fld_crm == 0x2) | |
1960 | info->reg.regno = 'z'; | |
1961 | else | |
7060c28e | 1962 | return false; |
3dd032c5 PW |
1963 | |
1964 | return true; | |
1965 | } | |
1966 | ||
d3de0860 PW |
1967 | bool |
1968 | aarch64_ext_sme_pred_reg_with_index (const aarch64_operand *self, | |
1969 | aarch64_opnd_info *info, aarch64_insn code, | |
1970 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
1971 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
1972 | { | |
1973 | aarch64_insn fld_rm = extract_field (self->fields[0], code, 0); | |
1974 | aarch64_insn fld_pn = extract_field (self->fields[1], code, 0); | |
1975 | aarch64_insn fld_i1 = extract_field (self->fields[2], code, 0); | |
1976 | aarch64_insn fld_tszh = extract_field (self->fields[3], code, 0); | |
1977 | aarch64_insn fld_tszl = extract_field (self->fields[4], code, 0); | |
1978 | int imm; | |
1979 | ||
575c497a RS |
1980 | info->indexed_za.regno = fld_pn; |
1981 | info->indexed_za.index.regno = fld_rm + 12; | |
d3de0860 | 1982 | |
a5791d58 RS |
1983 | if (fld_tszl & 0x1) |
1984 | imm = (fld_i1 << 3) | (fld_tszh << 2) | (fld_tszl >> 1); | |
1985 | else if (fld_tszl & 0x2) | |
1986 | imm = (fld_i1 << 2) | (fld_tszh << 1) | (fld_tszl >> 2); | |
1987 | else if (fld_tszl & 0x4) | |
1988 | imm = (fld_i1 << 1) | fld_tszh; | |
1989 | else if (fld_tszh) | |
1990 | imm = fld_i1; | |
d3de0860 PW |
1991 | else |
1992 | return false; | |
1993 | ||
575c497a | 1994 | info->indexed_za.index.imm = imm; |
d3de0860 PW |
1995 | return true; |
1996 | } | |
1997 | ||
f11ad6bc RS |
1998 | /* Decode Zn[MM], where MM has a 7-bit triangular encoding. The fields |
1999 | array specifies which field to use for Zn. MM is encoded in the | |
2000 | concatenation of imm5 and SVE_tszh, with imm5 being the less | |
2001 | significant part. */ | |
78933a4a | 2002 | bool |
f11ad6bc RS |
2003 | aarch64_ext_sve_index (const aarch64_operand *self, |
2004 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
2005 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
2006 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
f11ad6bc RS |
2007 | { |
2008 | int val; | |
2009 | ||
2010 | info->reglane.regno = extract_field (self->fields[0], code, 0); | |
2011 | val = extract_fields (code, 0, 2, FLD_SVE_tszh, FLD_imm5); | |
582e12bf | 2012 | if ((val & 31) == 0) |
f11ad6bc RS |
2013 | return 0; |
2014 | while ((val & 1) == 0) | |
2015 | val /= 2; | |
2016 | info->reglane.index = val / 2; | |
78933a4a | 2017 | return true; |
f11ad6bc RS |
2018 | } |
2019 | ||
e950b345 | 2020 | /* Decode a logical immediate for the MOV alias of SVE DUPM. */ |
78933a4a | 2021 | bool |
e950b345 RS |
2022 | aarch64_ext_sve_limm_mov (const aarch64_operand *self, |
2023 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
2024 | const aarch64_inst *inst, |
2025 | aarch64_operand_error *errors) | |
e950b345 RS |
2026 | { |
2027 | int esize = aarch64_get_qualifier_esize (inst->operands[0].qualifier); | |
561a72d4 | 2028 | return (aarch64_ext_limm (self, info, code, inst, errors) |
e950b345 RS |
2029 | && aarch64_sve_dupm_mov_immediate_p (info->imm.value, esize)); |
2030 | } | |
2031 | ||
582e12bf RS |
2032 | /* Decode Zn[MM], where Zn occupies the least-significant part of the field |
2033 | and where MM occupies the most-significant part. The operand-dependent | |
2034 | value specifies the number of bits in Zn. */ | |
78933a4a | 2035 | bool |
582e12bf RS |
2036 | aarch64_ext_sve_quad_index (const aarch64_operand *self, |
2037 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
2038 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
2039 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
582e12bf RS |
2040 | { |
2041 | unsigned int reg_bits = get_operand_specific_data (self); | |
2042 | unsigned int val = extract_all_fields (self, code); | |
2043 | info->reglane.regno = val & ((1 << reg_bits) - 1); | |
2044 | info->reglane.index = val >> reg_bits; | |
78933a4a | 2045 | return true; |
582e12bf RS |
2046 | } |
2047 | ||
f11ad6bc RS |
2048 | /* Decode {Zn.<T> - Zm.<T>}. The fields array specifies which field |
2049 | to use for Zn. The opcode-dependent value specifies the number | |
2050 | of registers in the list. */ | |
78933a4a | 2051 | bool |
f11ad6bc RS |
2052 | aarch64_ext_sve_reglist (const aarch64_operand *self, |
2053 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
2054 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
2055 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
f11ad6bc RS |
2056 | { |
2057 | info->reglist.first_regno = extract_field (self->fields[0], code, 0); | |
2058 | info->reglist.num_regs = get_opcode_dependent_value (inst->opcode); | |
f5b57fea | 2059 | info->reglist.stride = 1; |
78933a4a | 2060 | return true; |
f11ad6bc | 2061 | } |
2442d846 | 2062 | |
b408ebbf RS |
2063 | /* Decode a strided register list. The first field holds the top bit |
2064 | (0 or 16) and the second field holds the lower bits. The stride is | |
2065 | 16 divided by the list length. */ | |
2066 | bool | |
2067 | aarch64_ext_sve_strided_reglist (const aarch64_operand *self, | |
2068 | aarch64_opnd_info *info, aarch64_insn code, | |
2069 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
2070 | aarch64_operand_error *errors | |
2071 | ATTRIBUTE_UNUSED) | |
2072 | { | |
2073 | unsigned int upper = extract_field (self->fields[0], code, 0); | |
2074 | unsigned int lower = extract_field (self->fields[1], code, 0); | |
2075 | info->reglist.first_regno = upper * 16 + lower; | |
2076 | info->reglist.num_regs = get_operand_specific_data (self); | |
2077 | info->reglist.stride = 16 / info->reglist.num_regs; | |
2078 | return true; | |
2079 | } | |
2080 | ||
2442d846 RS |
2081 | /* Decode <pattern>{, MUL #<amount>}. The fields array specifies which |
2082 | fields to use for <pattern>. <amount> - 1 is encoded in the SVE_imm4 | |
2083 | field. */ | |
78933a4a | 2084 | bool |
2442d846 RS |
2085 | aarch64_ext_sve_scale (const aarch64_operand *self, |
2086 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 | 2087 | const aarch64_inst *inst, aarch64_operand_error *errors) |
2442d846 RS |
2088 | { |
2089 | int val; | |
2090 | ||
561a72d4 | 2091 | if (!aarch64_ext_imm (self, info, code, inst, errors)) |
78933a4a | 2092 | return false; |
2442d846 RS |
2093 | val = extract_field (FLD_SVE_imm4, code, 0); |
2094 | info->shifter.kind = AARCH64_MOD_MUL; | |
2095 | info->shifter.amount = val + 1; | |
2096 | info->shifter.operator_present = (val != 0); | |
2097 | info->shifter.amount_present = (val != 0); | |
78933a4a | 2098 | return true; |
2442d846 | 2099 | } |
e950b345 RS |
2100 | |
2101 | /* Return the top set bit in VALUE, which is expected to be relatively | |
2102 | small. */ | |
2103 | static uint64_t | |
2104 | get_top_bit (uint64_t value) | |
2105 | { | |
2106 | while ((value & -value) != value) | |
2107 | value -= value & -value; | |
2108 | return value; | |
2109 | } | |
2110 | ||
2111 | /* Decode an SVE shift-left immediate. */ | |
78933a4a | 2112 | bool |
e950b345 RS |
2113 | aarch64_ext_sve_shlimm (const aarch64_operand *self, |
2114 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 | 2115 | const aarch64_inst *inst, aarch64_operand_error *errors) |
e950b345 | 2116 | { |
561a72d4 | 2117 | if (!aarch64_ext_imm (self, info, code, inst, errors) |
e950b345 | 2118 | || info->imm.value == 0) |
78933a4a | 2119 | return false; |
e950b345 RS |
2120 | |
2121 | info->imm.value -= get_top_bit (info->imm.value); | |
78933a4a | 2122 | return true; |
e950b345 RS |
2123 | } |
2124 | ||
2125 | /* Decode an SVE shift-right immediate. */ | |
78933a4a | 2126 | bool |
e950b345 RS |
2127 | aarch64_ext_sve_shrimm (const aarch64_operand *self, |
2128 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 | 2129 | const aarch64_inst *inst, aarch64_operand_error *errors) |
e950b345 | 2130 | { |
561a72d4 | 2131 | if (!aarch64_ext_imm (self, info, code, inst, errors) |
e950b345 | 2132 | || info->imm.value == 0) |
78933a4a | 2133 | return false; |
e950b345 RS |
2134 | |
2135 | info->imm.value = get_top_bit (info->imm.value) * 2 - info->imm.value; | |
78933a4a | 2136 | return true; |
e950b345 | 2137 | } |
6327658e RS |
2138 | |
2139 | /* Decode X0-X30. Register 31 is unallocated. */ | |
2140 | bool | |
2141 | aarch64_ext_x0_to_x30 (const aarch64_operand *self, aarch64_opnd_info *info, | |
2142 | const aarch64_insn code, | |
2143 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
2144 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
2145 | { | |
2146 | info->reg.regno = extract_field (self->fields[0], code, 0); | |
2147 | return info->reg.regno <= 30; | |
2148 | } | |
99e01a66 RS |
2149 | |
2150 | /* Decode an indexed register, with the first field being the register | |
2151 | number and the remaining fields being the index. */ | |
2152 | bool | |
2153 | aarch64_ext_simple_index (const aarch64_operand *self, aarch64_opnd_info *info, | |
2154 | const aarch64_insn code, | |
2155 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
2156 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
2157 | { | |
2158 | int bias = get_operand_specific_data (self); | |
2159 | info->reglane.regno = extract_field (self->fields[0], code, 0) + bias; | |
2160 | info->reglane.index = extract_all_fields_after (self, 1, code); | |
2161 | return true; | |
2162 | } | |
6efa6601 RS |
2163 | |
2164 | /* Decode a plain shift-right immediate, when there is only a single | |
2165 | element size. */ | |
2166 | bool | |
2167 | aarch64_ext_plain_shrimm (const aarch64_operand *self, aarch64_opnd_info *info, | |
2168 | const aarch64_insn code, | |
2169 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
2170 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
2171 | { | |
2172 | unsigned int base = 1 << get_operand_field_width (self, 0); | |
2173 | info->imm.value = base - extract_field (self->fields[0], code, 0); | |
2174 | return true; | |
2175 | } | |
a06ea964 NC |
2176 | \f |
2177 | /* Bitfields that are commonly used to encode certain operands' information | |
2178 | may be partially used as part of the base opcode in some instructions. | |
2179 | For example, the bit 1 of the field 'size' in | |
2180 | FCVTXN <Vb><d>, <Va><n> | |
2181 | is actually part of the base opcode, while only size<0> is available | |
2182 | for encoding the register type. Another example is the AdvSIMD | |
2183 | instruction ORR (register), in which the field 'size' is also used for | |
2184 | the base opcode, leaving only the field 'Q' available to encode the | |
2185 | vector register arrangement specifier '8B' or '16B'. | |
2186 | ||
2187 | This function tries to deduce the qualifier from the value of partially | |
2188 | constrained field(s). Given the VALUE of such a field or fields, the | |
2189 | qualifiers CANDIDATES and the MASK (indicating which bits are valid for | |
2190 | operand encoding), the function returns the matching qualifier or | |
2191 | AARCH64_OPND_QLF_NIL if nothing matches. | |
2192 | ||
2193 | N.B. CANDIDATES is a group of possible qualifiers that are valid for | |
2194 | one operand; it has a maximum of AARCH64_MAX_QLF_SEQ_NUM qualifiers and | |
2195 | may end with AARCH64_OPND_QLF_NIL. */ | |
2196 | ||
2197 | static enum aarch64_opnd_qualifier | |
2198 | get_qualifier_from_partial_encoding (aarch64_insn value, | |
2199 | const enum aarch64_opnd_qualifier* \ | |
2200 | candidates, | |
2201 | aarch64_insn mask) | |
2202 | { | |
2203 | int i; | |
2204 | DEBUG_TRACE ("enter with value: %d, mask: %d", (int)value, (int)mask); | |
2205 | for (i = 0; i < AARCH64_MAX_QLF_SEQ_NUM; ++i) | |
2206 | { | |
2207 | aarch64_insn standard_value; | |
2208 | if (candidates[i] == AARCH64_OPND_QLF_NIL) | |
2209 | break; | |
2210 | standard_value = aarch64_get_qualifier_standard_value (candidates[i]); | |
2211 | if ((standard_value & mask) == (value & mask)) | |
2212 | return candidates[i]; | |
2213 | } | |
2214 | return AARCH64_OPND_QLF_NIL; | |
2215 | } | |
2216 | ||
2217 | /* Given a list of qualifier sequences, return all possible valid qualifiers | |
2218 | for operand IDX in QUALIFIERS. | |
2219 | Assume QUALIFIERS is an array whose length is large enough. */ | |
2220 | ||
2221 | static void | |
2222 | get_operand_possible_qualifiers (int idx, | |
2223 | const aarch64_opnd_qualifier_seq_t *list, | |
2224 | enum aarch64_opnd_qualifier *qualifiers) | |
2225 | { | |
2226 | int i; | |
2227 | for (i = 0; i < AARCH64_MAX_QLF_SEQ_NUM; ++i) | |
2228 | if ((qualifiers[i] = list[i][idx]) == AARCH64_OPND_QLF_NIL) | |
2229 | break; | |
2230 | } | |
2231 | ||
2232 | /* Decode the size Q field for e.g. SHADD. | |
2233 | We tag one operand with the qualifer according to the code; | |
2234 | whether the qualifier is valid for this opcode or not, it is the | |
2235 | duty of the semantic checking. */ | |
2236 | ||
2237 | static int | |
2238 | decode_sizeq (aarch64_inst *inst) | |
2239 | { | |
2240 | int idx; | |
2241 | enum aarch64_opnd_qualifier qualifier; | |
2242 | aarch64_insn code; | |
2243 | aarch64_insn value, mask; | |
2244 | enum aarch64_field_kind fld_sz; | |
2245 | enum aarch64_opnd_qualifier candidates[AARCH64_MAX_QLF_SEQ_NUM]; | |
2246 | ||
2247 | if (inst->opcode->iclass == asisdlse | |
2248 | || inst->opcode->iclass == asisdlsep | |
2249 | || inst->opcode->iclass == asisdlso | |
2250 | || inst->opcode->iclass == asisdlsop) | |
2251 | fld_sz = FLD_vldst_size; | |
2252 | else | |
2253 | fld_sz = FLD_size; | |
2254 | ||
2255 | code = inst->value; | |
2256 | value = extract_fields (code, inst->opcode->mask, 2, fld_sz, FLD_Q); | |
2257 | /* Obtain the info that which bits of fields Q and size are actually | |
2258 | available for operand encoding. Opcodes like FMAXNM and FMLA have | |
2259 | size[1] unavailable. */ | |
2260 | mask = extract_fields (~inst->opcode->mask, 0, 2, fld_sz, FLD_Q); | |
2261 | ||
2262 | /* The index of the operand we are going to tag a qualifier and the qualifer | |
2263 | itself are reasoned from the value of the size and Q fields and the | |
2264 | possible valid qualifier lists. */ | |
2265 | idx = aarch64_select_operand_for_sizeq_field_coding (inst->opcode); | |
2266 | DEBUG_TRACE ("key idx: %d", idx); | |
2267 | ||
2268 | /* For most related instruciton, size:Q are fully available for operand | |
2269 | encoding. */ | |
2270 | if (mask == 0x7) | |
2271 | { | |
2272 | inst->operands[idx].qualifier = get_vreg_qualifier_from_value (value); | |
2273 | return 1; | |
2274 | } | |
2275 | ||
2276 | get_operand_possible_qualifiers (idx, inst->opcode->qualifiers_list, | |
2277 | candidates); | |
2278 | #ifdef DEBUG_AARCH64 | |
2279 | if (debug_dump) | |
2280 | { | |
2281 | int i; | |
2282 | for (i = 0; candidates[i] != AARCH64_OPND_QLF_NIL | |
2283 | && i < AARCH64_MAX_QLF_SEQ_NUM; ++i) | |
2284 | DEBUG_TRACE ("qualifier %d: %s", i, | |
2285 | aarch64_get_qualifier_name(candidates[i])); | |
2286 | DEBUG_TRACE ("%d, %d", (int)value, (int)mask); | |
2287 | } | |
2288 | #endif /* DEBUG_AARCH64 */ | |
2289 | ||
2290 | qualifier = get_qualifier_from_partial_encoding (value, candidates, mask); | |
2291 | ||
2292 | if (qualifier == AARCH64_OPND_QLF_NIL) | |
2293 | return 0; | |
2294 | ||
2295 | inst->operands[idx].qualifier = qualifier; | |
2296 | return 1; | |
2297 | } | |
2298 | ||
2299 | /* Decode size[0]:Q, i.e. bit 22 and bit 30, for | |
2300 | e.g. FCVTN<Q> <Vd>.<Tb>, <Vn>.<Ta>. */ | |
2301 | ||
2302 | static int | |
2303 | decode_asimd_fcvt (aarch64_inst *inst) | |
2304 | { | |
2305 | aarch64_field field = {0, 0}; | |
2306 | aarch64_insn value; | |
2307 | enum aarch64_opnd_qualifier qualifier; | |
2308 | ||
2309 | gen_sub_field (FLD_size, 0, 1, &field); | |
2310 | value = extract_field_2 (&field, inst->value, 0); | |
2311 | qualifier = value == 0 ? AARCH64_OPND_QLF_V_4S | |
2312 | : AARCH64_OPND_QLF_V_2D; | |
2313 | switch (inst->opcode->op) | |
2314 | { | |
2315 | case OP_FCVTN: | |
2316 | case OP_FCVTN2: | |
2317 | /* FCVTN<Q> <Vd>.<Tb>, <Vn>.<Ta>. */ | |
2318 | inst->operands[1].qualifier = qualifier; | |
2319 | break; | |
2320 | case OP_FCVTL: | |
2321 | case OP_FCVTL2: | |
2322 | /* FCVTL<Q> <Vd>.<Ta>, <Vn>.<Tb>. */ | |
2323 | inst->operands[0].qualifier = qualifier; | |
2324 | break; | |
2325 | default: | |
a06ea964 NC |
2326 | return 0; |
2327 | } | |
2328 | ||
2329 | return 1; | |
2330 | } | |
2331 | ||
2332 | /* Decode size[0], i.e. bit 22, for | |
2333 | e.g. FCVTXN <Vb><d>, <Va><n>. */ | |
2334 | ||
2335 | static int | |
2336 | decode_asisd_fcvtxn (aarch64_inst *inst) | |
2337 | { | |
2338 | aarch64_field field = {0, 0}; | |
2339 | gen_sub_field (FLD_size, 0, 1, &field); | |
2340 | if (!extract_field_2 (&field, inst->value, 0)) | |
2341 | return 0; | |
2342 | inst->operands[0].qualifier = AARCH64_OPND_QLF_S_S; | |
2343 | return 1; | |
2344 | } | |
2345 | ||
2346 | /* Decode the 'opc' field for e.g. FCVT <Dd>, <Sn>. */ | |
2347 | static int | |
2348 | decode_fcvt (aarch64_inst *inst) | |
2349 | { | |
2350 | enum aarch64_opnd_qualifier qualifier; | |
2351 | aarch64_insn value; | |
2352 | const aarch64_field field = {15, 2}; | |
2353 | ||
2354 | /* opc dstsize */ | |
2355 | value = extract_field_2 (&field, inst->value, 0); | |
2356 | switch (value) | |
2357 | { | |
2358 | case 0: qualifier = AARCH64_OPND_QLF_S_S; break; | |
2359 | case 1: qualifier = AARCH64_OPND_QLF_S_D; break; | |
2360 | case 3: qualifier = AARCH64_OPND_QLF_S_H; break; | |
2361 | default: return 0; | |
2362 | } | |
2363 | inst->operands[0].qualifier = qualifier; | |
2364 | ||
2365 | return 1; | |
2366 | } | |
2367 | ||
2368 | /* Do miscellaneous decodings that are not common enough to be driven by | |
2369 | flags. */ | |
2370 | ||
2371 | static int | |
2372 | do_misc_decoding (aarch64_inst *inst) | |
2373 | { | |
c0890d26 | 2374 | unsigned int value; |
a06ea964 NC |
2375 | switch (inst->opcode->op) |
2376 | { | |
2377 | case OP_FCVT: | |
2378 | return decode_fcvt (inst); | |
c0890d26 | 2379 | |
a06ea964 NC |
2380 | case OP_FCVTN: |
2381 | case OP_FCVTN2: | |
2382 | case OP_FCVTL: | |
2383 | case OP_FCVTL2: | |
2384 | return decode_asimd_fcvt (inst); | |
c0890d26 | 2385 | |
a06ea964 NC |
2386 | case OP_FCVTXN_S: |
2387 | return decode_asisd_fcvtxn (inst); | |
c0890d26 RS |
2388 | |
2389 | case OP_MOV_P_P: | |
2390 | case OP_MOVS_P_P: | |
2391 | value = extract_field (FLD_SVE_Pn, inst->value, 0); | |
2392 | return (value == extract_field (FLD_SVE_Pm, inst->value, 0) | |
2393 | && value == extract_field (FLD_SVE_Pg4_10, inst->value, 0)); | |
2394 | ||
2395 | case OP_MOV_Z_P_Z: | |
2396 | return (extract_field (FLD_SVE_Zd, inst->value, 0) | |
2397 | == extract_field (FLD_SVE_Zm_16, inst->value, 0)); | |
2398 | ||
2399 | case OP_MOV_Z_V: | |
2400 | /* Index must be zero. */ | |
2401 | value = extract_fields (inst->value, 0, 2, FLD_SVE_tszh, FLD_imm5); | |
582e12bf | 2402 | return value > 0 && value <= 16 && value == (value & -value); |
c0890d26 RS |
2403 | |
2404 | case OP_MOV_Z_Z: | |
2405 | return (extract_field (FLD_SVE_Zn, inst->value, 0) | |
2406 | == extract_field (FLD_SVE_Zm_16, inst->value, 0)); | |
2407 | ||
2408 | case OP_MOV_Z_Zi: | |
2409 | /* Index must be nonzero. */ | |
2410 | value = extract_fields (inst->value, 0, 2, FLD_SVE_tszh, FLD_imm5); | |
582e12bf | 2411 | return value > 0 && value != (value & -value); |
c0890d26 RS |
2412 | |
2413 | case OP_MOVM_P_P_P: | |
2414 | return (extract_field (FLD_SVE_Pd, inst->value, 0) | |
2415 | == extract_field (FLD_SVE_Pm, inst->value, 0)); | |
2416 | ||
2417 | case OP_MOVZS_P_P_P: | |
2418 | case OP_MOVZ_P_P_P: | |
2419 | return (extract_field (FLD_SVE_Pn, inst->value, 0) | |
2420 | == extract_field (FLD_SVE_Pm, inst->value, 0)); | |
2421 | ||
2422 | case OP_NOTS_P_P_P_Z: | |
2423 | case OP_NOT_P_P_P_Z: | |
2424 | return (extract_field (FLD_SVE_Pm, inst->value, 0) | |
2425 | == extract_field (FLD_SVE_Pg4_10, inst->value, 0)); | |
2426 | ||
a06ea964 NC |
2427 | default: |
2428 | return 0; | |
2429 | } | |
2430 | } | |
2431 | ||
2432 | /* Opcodes that have fields shared by multiple operands are usually flagged | |
2433 | with flags. In this function, we detect such flags, decode the related | |
2434 | field(s) and store the information in one of the related operands. The | |
2435 | 'one' operand is not any operand but one of the operands that can | |
2436 | accommadate all the information that has been decoded. */ | |
2437 | ||
2438 | static int | |
2439 | do_special_decoding (aarch64_inst *inst) | |
2440 | { | |
2441 | int idx; | |
2442 | aarch64_insn value; | |
2443 | /* Condition for truly conditional executed instructions, e.g. b.cond. */ | |
2444 | if (inst->opcode->flags & F_COND) | |
2445 | { | |
2446 | value = extract_field (FLD_cond2, inst->value, 0); | |
2447 | inst->cond = get_cond_from_value (value); | |
2448 | } | |
2449 | /* 'sf' field. */ | |
2450 | if (inst->opcode->flags & F_SF) | |
2451 | { | |
2452 | idx = select_operand_for_sf_field_coding (inst->opcode); | |
2453 | value = extract_field (FLD_sf, inst->value, 0); | |
2454 | inst->operands[idx].qualifier = get_greg_qualifier_from_value (value); | |
2455 | if ((inst->opcode->flags & F_N) | |
2456 | && extract_field (FLD_N, inst->value, 0) != value) | |
2457 | return 0; | |
2458 | } | |
ee804238 JW |
2459 | /* 'sf' field. */ |
2460 | if (inst->opcode->flags & F_LSE_SZ) | |
2461 | { | |
2462 | idx = select_operand_for_sf_field_coding (inst->opcode); | |
2463 | value = extract_field (FLD_lse_sz, inst->value, 0); | |
2464 | inst->operands[idx].qualifier = get_greg_qualifier_from_value (value); | |
2465 | } | |
a06ea964 NC |
2466 | /* size:Q fields. */ |
2467 | if (inst->opcode->flags & F_SIZEQ) | |
2468 | return decode_sizeq (inst); | |
2469 | ||
2470 | if (inst->opcode->flags & F_FPTYPE) | |
2471 | { | |
2472 | idx = select_operand_for_fptype_field_coding (inst->opcode); | |
2473 | value = extract_field (FLD_type, inst->value, 0); | |
2474 | switch (value) | |
2475 | { | |
2476 | case 0: inst->operands[idx].qualifier = AARCH64_OPND_QLF_S_S; break; | |
2477 | case 1: inst->operands[idx].qualifier = AARCH64_OPND_QLF_S_D; break; | |
2478 | case 3: inst->operands[idx].qualifier = AARCH64_OPND_QLF_S_H; break; | |
2479 | default: return 0; | |
2480 | } | |
2481 | } | |
2482 | ||
2483 | if (inst->opcode->flags & F_SSIZE) | |
2484 | { | |
2485 | /* N.B. some opcodes like FCMGT <V><d>, <V><n>, #0 have the size[1] as part | |
2486 | of the base opcode. */ | |
2487 | aarch64_insn mask; | |
2488 | enum aarch64_opnd_qualifier candidates[AARCH64_MAX_QLF_SEQ_NUM]; | |
2489 | idx = select_operand_for_scalar_size_field_coding (inst->opcode); | |
2490 | value = extract_field (FLD_size, inst->value, inst->opcode->mask); | |
2491 | mask = extract_field (FLD_size, ~inst->opcode->mask, 0); | |
2492 | /* For most related instruciton, the 'size' field is fully available for | |
2493 | operand encoding. */ | |
2494 | if (mask == 0x3) | |
2495 | inst->operands[idx].qualifier = get_sreg_qualifier_from_value (value); | |
2496 | else | |
2497 | { | |
2498 | get_operand_possible_qualifiers (idx, inst->opcode->qualifiers_list, | |
2499 | candidates); | |
2500 | inst->operands[idx].qualifier | |
2501 | = get_qualifier_from_partial_encoding (value, candidates, mask); | |
2502 | } | |
2503 | } | |
2504 | ||
2505 | if (inst->opcode->flags & F_T) | |
2506 | { | |
2507 | /* Num of consecutive '0's on the right side of imm5<3:0>. */ | |
2508 | int num = 0; | |
2509 | unsigned val, Q; | |
2510 | assert (aarch64_get_operand_class (inst->opcode->operands[0]) | |
2511 | == AARCH64_OPND_CLASS_SIMD_REG); | |
2512 | /* imm5<3:0> q <t> | |
2513 | 0000 x reserved | |
2514 | xxx1 0 8b | |
2515 | xxx1 1 16b | |
2516 | xx10 0 4h | |
2517 | xx10 1 8h | |
2518 | x100 0 2s | |
2519 | x100 1 4s | |
2520 | 1000 0 reserved | |
2521 | 1000 1 2d */ | |
2522 | val = extract_field (FLD_imm5, inst->value, 0); | |
2523 | while ((val & 0x1) == 0 && ++num <= 3) | |
2524 | val >>= 1; | |
2525 | if (num > 3) | |
2526 | return 0; | |
2527 | Q = (unsigned) extract_field (FLD_Q, inst->value, inst->opcode->mask); | |
2528 | inst->operands[0].qualifier = | |
2529 | get_vreg_qualifier_from_value ((num << 1) | Q); | |
2530 | } | |
2531 | ||
2532 | if (inst->opcode->flags & F_GPRSIZE_IN_Q) | |
2533 | { | |
2534 | /* Use Rt to encode in the case of e.g. | |
2535 | STXP <Ws>, <Xt1>, <Xt2>, [<Xn|SP>{,#0}]. */ | |
2536 | idx = aarch64_operand_index (inst->opcode->operands, AARCH64_OPND_Rt); | |
2537 | if (idx == -1) | |
2538 | { | |
2539 | /* Otherwise use the result operand, which has to be a integer | |
2540 | register. */ | |
2541 | assert (aarch64_get_operand_class (inst->opcode->operands[0]) | |
2542 | == AARCH64_OPND_CLASS_INT_REG); | |
2543 | idx = 0; | |
2544 | } | |
2545 | assert (idx == 0 || idx == 1); | |
2546 | value = extract_field (FLD_Q, inst->value, 0); | |
2547 | inst->operands[idx].qualifier = get_greg_qualifier_from_value (value); | |
2548 | } | |
2549 | ||
2550 | if (inst->opcode->flags & F_LDS_SIZE) | |
2551 | { | |
2552 | aarch64_field field = {0, 0}; | |
2553 | assert (aarch64_get_operand_class (inst->opcode->operands[0]) | |
2554 | == AARCH64_OPND_CLASS_INT_REG); | |
2555 | gen_sub_field (FLD_opc, 0, 1, &field); | |
2556 | value = extract_field_2 (&field, inst->value, 0); | |
2557 | inst->operands[0].qualifier | |
2558 | = value ? AARCH64_OPND_QLF_W : AARCH64_OPND_QLF_X; | |
2559 | } | |
2560 | ||
2561 | /* Miscellaneous decoding; done as the last step. */ | |
2562 | if (inst->opcode->flags & F_MISC) | |
2563 | return do_misc_decoding (inst); | |
2564 | ||
2565 | return 1; | |
2566 | } | |
2567 | ||
2568 | /* Converters converting a real opcode instruction to its alias form. */ | |
2569 | ||
2570 | /* ROR <Wd>, <Ws>, #<shift> | |
2571 | is equivalent to: | |
2572 | EXTR <Wd>, <Ws>, <Ws>, #<shift>. */ | |
2573 | static int | |
2574 | convert_extr_to_ror (aarch64_inst *inst) | |
2575 | { | |
2576 | if (inst->operands[1].reg.regno == inst->operands[2].reg.regno) | |
2577 | { | |
2578 | copy_operand_info (inst, 2, 3); | |
2579 | inst->operands[3].type = AARCH64_OPND_NIL; | |
2580 | return 1; | |
2581 | } | |
2582 | return 0; | |
2583 | } | |
2584 | ||
e30181a5 YZ |
2585 | /* UXTL<Q> <Vd>.<Ta>, <Vn>.<Tb> |
2586 | is equivalent to: | |
2587 | USHLL<Q> <Vd>.<Ta>, <Vn>.<Tb>, #0. */ | |
2588 | static int | |
2589 | convert_shll_to_xtl (aarch64_inst *inst) | |
2590 | { | |
2591 | if (inst->operands[2].imm.value == 0) | |
2592 | { | |
2593 | inst->operands[2].type = AARCH64_OPND_NIL; | |
2594 | return 1; | |
2595 | } | |
2596 | return 0; | |
2597 | } | |
2598 | ||
a06ea964 NC |
2599 | /* Convert |
2600 | UBFM <Xd>, <Xn>, #<shift>, #63. | |
2601 | to | |
2602 | LSR <Xd>, <Xn>, #<shift>. */ | |
2603 | static int | |
2604 | convert_bfm_to_sr (aarch64_inst *inst) | |
2605 | { | |
2606 | int64_t imms, val; | |
2607 | ||
2608 | imms = inst->operands[3].imm.value; | |
2609 | val = inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31 ? 31 : 63; | |
2610 | if (imms == val) | |
2611 | { | |
2612 | inst->operands[3].type = AARCH64_OPND_NIL; | |
2613 | return 1; | |
2614 | } | |
2615 | ||
2616 | return 0; | |
2617 | } | |
2618 | ||
2619 | /* Convert MOV to ORR. */ | |
2620 | static int | |
2621 | convert_orr_to_mov (aarch64_inst *inst) | |
2622 | { | |
2623 | /* MOV <Vd>.<T>, <Vn>.<T> | |
2624 | is equivalent to: | |
2625 | ORR <Vd>.<T>, <Vn>.<T>, <Vn>.<T>. */ | |
2626 | if (inst->operands[1].reg.regno == inst->operands[2].reg.regno) | |
2627 | { | |
2628 | inst->operands[2].type = AARCH64_OPND_NIL; | |
2629 | return 1; | |
2630 | } | |
2631 | return 0; | |
2632 | } | |
2633 | ||
2634 | /* When <imms> >= <immr>, the instruction written: | |
2635 | SBFX <Xd>, <Xn>, #<lsb>, #<width> | |
2636 | is equivalent to: | |
2637 | SBFM <Xd>, <Xn>, #<lsb>, #(<lsb>+<width>-1). */ | |
2638 | ||
2639 | static int | |
2640 | convert_bfm_to_bfx (aarch64_inst *inst) | |
2641 | { | |
2642 | int64_t immr, imms; | |
2643 | ||
2644 | immr = inst->operands[2].imm.value; | |
2645 | imms = inst->operands[3].imm.value; | |
2646 | if (imms >= immr) | |
2647 | { | |
2648 | int64_t lsb = immr; | |
2649 | inst->operands[2].imm.value = lsb; | |
2650 | inst->operands[3].imm.value = imms + 1 - lsb; | |
2651 | /* The two opcodes have different qualifiers for | |
2652 | the immediate operands; reset to help the checking. */ | |
2653 | reset_operand_qualifier (inst, 2); | |
2654 | reset_operand_qualifier (inst, 3); | |
2655 | return 1; | |
2656 | } | |
2657 | ||
2658 | return 0; | |
2659 | } | |
2660 | ||
2661 | /* When <imms> < <immr>, the instruction written: | |
2662 | SBFIZ <Xd>, <Xn>, #<lsb>, #<width> | |
2663 | is equivalent to: | |
2664 | SBFM <Xd>, <Xn>, #((64-<lsb>)&0x3f), #(<width>-1). */ | |
2665 | ||
2666 | static int | |
2667 | convert_bfm_to_bfi (aarch64_inst *inst) | |
2668 | { | |
2669 | int64_t immr, imms, val; | |
2670 | ||
2671 | immr = inst->operands[2].imm.value; | |
2672 | imms = inst->operands[3].imm.value; | |
2673 | val = inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31 ? 32 : 64; | |
2674 | if (imms < immr) | |
2675 | { | |
2676 | inst->operands[2].imm.value = (val - immr) & (val - 1); | |
2677 | inst->operands[3].imm.value = imms + 1; | |
2678 | /* The two opcodes have different qualifiers for | |
2679 | the immediate operands; reset to help the checking. */ | |
2680 | reset_operand_qualifier (inst, 2); | |
2681 | reset_operand_qualifier (inst, 3); | |
2682 | return 1; | |
2683 | } | |
2684 | ||
2685 | return 0; | |
2686 | } | |
2687 | ||
d685192a MW |
2688 | /* The instruction written: |
2689 | BFC <Xd>, #<lsb>, #<width> | |
2690 | is equivalent to: | |
2691 | BFM <Xd>, XZR, #((64-<lsb>)&0x3f), #(<width>-1). */ | |
2692 | ||
2693 | static int | |
2694 | convert_bfm_to_bfc (aarch64_inst *inst) | |
2695 | { | |
2696 | int64_t immr, imms, val; | |
2697 | ||
2698 | /* Should have been assured by the base opcode value. */ | |
2699 | assert (inst->operands[1].reg.regno == 0x1f); | |
2700 | ||
2701 | immr = inst->operands[2].imm.value; | |
2702 | imms = inst->operands[3].imm.value; | |
2703 | val = inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31 ? 32 : 64; | |
2704 | if (imms < immr) | |
2705 | { | |
2706 | /* Drop XZR from the second operand. */ | |
2707 | copy_operand_info (inst, 1, 2); | |
2708 | copy_operand_info (inst, 2, 3); | |
2709 | inst->operands[3].type = AARCH64_OPND_NIL; | |
2710 | ||
2711 | /* Recalculate the immediates. */ | |
2712 | inst->operands[1].imm.value = (val - immr) & (val - 1); | |
2713 | inst->operands[2].imm.value = imms + 1; | |
2714 | ||
2715 | /* The two opcodes have different qualifiers for the operands; reset to | |
2716 | help the checking. */ | |
2717 | reset_operand_qualifier (inst, 1); | |
2718 | reset_operand_qualifier (inst, 2); | |
2719 | reset_operand_qualifier (inst, 3); | |
2720 | ||
2721 | return 1; | |
2722 | } | |
2723 | ||
2724 | return 0; | |
2725 | } | |
2726 | ||
a06ea964 NC |
2727 | /* The instruction written: |
2728 | LSL <Xd>, <Xn>, #<shift> | |
2729 | is equivalent to: | |
2730 | UBFM <Xd>, <Xn>, #((64-<shift>)&0x3f), #(63-<shift>). */ | |
2731 | ||
2732 | static int | |
2733 | convert_ubfm_to_lsl (aarch64_inst *inst) | |
2734 | { | |
2735 | int64_t immr = inst->operands[2].imm.value; | |
2736 | int64_t imms = inst->operands[3].imm.value; | |
2737 | int64_t val | |
2738 | = inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31 ? 31 : 63; | |
2739 | ||
2740 | if ((immr == 0 && imms == val) || immr == imms + 1) | |
2741 | { | |
2742 | inst->operands[3].type = AARCH64_OPND_NIL; | |
2743 | inst->operands[2].imm.value = val - imms; | |
2744 | return 1; | |
2745 | } | |
2746 | ||
2747 | return 0; | |
2748 | } | |
2749 | ||
2750 | /* CINC <Wd>, <Wn>, <cond> | |
2751 | is equivalent to: | |
68a64283 YZ |
2752 | CSINC <Wd>, <Wn>, <Wn>, invert(<cond>) |
2753 | where <cond> is not AL or NV. */ | |
a06ea964 NC |
2754 | |
2755 | static int | |
2756 | convert_from_csel (aarch64_inst *inst) | |
2757 | { | |
68a64283 YZ |
2758 | if (inst->operands[1].reg.regno == inst->operands[2].reg.regno |
2759 | && (inst->operands[3].cond->value & 0xe) != 0xe) | |
a06ea964 NC |
2760 | { |
2761 | copy_operand_info (inst, 2, 3); | |
2762 | inst->operands[2].cond = get_inverted_cond (inst->operands[3].cond); | |
2763 | inst->operands[3].type = AARCH64_OPND_NIL; | |
2764 | return 1; | |
2765 | } | |
2766 | return 0; | |
2767 | } | |
2768 | ||
2769 | /* CSET <Wd>, <cond> | |
2770 | is equivalent to: | |
68a64283 YZ |
2771 | CSINC <Wd>, WZR, WZR, invert(<cond>) |
2772 | where <cond> is not AL or NV. */ | |
a06ea964 NC |
2773 | |
2774 | static int | |
2775 | convert_csinc_to_cset (aarch64_inst *inst) | |
2776 | { | |
2777 | if (inst->operands[1].reg.regno == 0x1f | |
68a64283 YZ |
2778 | && inst->operands[2].reg.regno == 0x1f |
2779 | && (inst->operands[3].cond->value & 0xe) != 0xe) | |
a06ea964 NC |
2780 | { |
2781 | copy_operand_info (inst, 1, 3); | |
2782 | inst->operands[1].cond = get_inverted_cond (inst->operands[3].cond); | |
2783 | inst->operands[3].type = AARCH64_OPND_NIL; | |
2784 | inst->operands[2].type = AARCH64_OPND_NIL; | |
2785 | return 1; | |
2786 | } | |
2787 | return 0; | |
2788 | } | |
2789 | ||
2790 | /* MOV <Wd>, #<imm> | |
2791 | is equivalent to: | |
1d106042 | 2792 | MOVZ <Wd>, #<imm16_5>, LSL #<shift>. |
a06ea964 NC |
2793 | |
2794 | A disassembler may output ORR, MOVZ and MOVN as a MOV mnemonic, except when | |
2795 | ORR has an immediate that could be generated by a MOVZ or MOVN instruction, | |
2796 | or where a MOVN has an immediate that could be encoded by MOVZ, or where | |
2797 | MOVZ/MOVN #0 have a shift amount other than LSL #0, in which case the | |
2798 | machine-instruction mnemonic must be used. */ | |
2799 | ||
2800 | static int | |
2801 | convert_movewide_to_mov (aarch64_inst *inst) | |
2802 | { | |
2803 | uint64_t value = inst->operands[1].imm.value; | |
2804 | /* MOVZ/MOVN #0 have a shift amount other than LSL #0. */ | |
2805 | if (value == 0 && inst->operands[1].shifter.amount != 0) | |
2806 | return 0; | |
2807 | inst->operands[1].type = AARCH64_OPND_IMM_MOV; | |
2808 | inst->operands[1].shifter.kind = AARCH64_MOD_NONE; | |
2809 | value <<= inst->operands[1].shifter.amount; | |
2810 | /* As an alias convertor, it has to be clear that the INST->OPCODE | |
2811 | is the opcode of the real instruction. */ | |
2812 | if (inst->opcode->op == OP_MOVN) | |
2813 | { | |
2814 | int is32 = inst->operands[0].qualifier == AARCH64_OPND_QLF_W; | |
2815 | value = ~value; | |
2816 | /* A MOVN has an immediate that could be encoded by MOVZ. */ | |
535b785f | 2817 | if (aarch64_wide_constant_p (value, is32, NULL)) |
a06ea964 NC |
2818 | return 0; |
2819 | } | |
2820 | inst->operands[1].imm.value = value; | |
2821 | inst->operands[1].shifter.amount = 0; | |
2822 | return 1; | |
2823 | } | |
2824 | ||
2825 | /* MOV <Wd>, #<imm> | |
2826 | is equivalent to: | |
2827 | ORR <Wd>, WZR, #<imm>. | |
2828 | ||
2829 | A disassembler may output ORR, MOVZ and MOVN as a MOV mnemonic, except when | |
2830 | ORR has an immediate that could be generated by a MOVZ or MOVN instruction, | |
2831 | or where a MOVN has an immediate that could be encoded by MOVZ, or where | |
2832 | MOVZ/MOVN #0 have a shift amount other than LSL #0, in which case the | |
2833 | machine-instruction mnemonic must be used. */ | |
2834 | ||
2835 | static int | |
2836 | convert_movebitmask_to_mov (aarch64_inst *inst) | |
2837 | { | |
2838 | int is32; | |
2839 | uint64_t value; | |
2840 | ||
2841 | /* Should have been assured by the base opcode value. */ | |
2842 | assert (inst->operands[1].reg.regno == 0x1f); | |
2843 | copy_operand_info (inst, 1, 2); | |
2844 | is32 = inst->operands[0].qualifier == AARCH64_OPND_QLF_W; | |
2845 | inst->operands[1].type = AARCH64_OPND_IMM_MOV; | |
2846 | value = inst->operands[1].imm.value; | |
2847 | /* ORR has an immediate that could be generated by a MOVZ or MOVN | |
2848 | instruction. */ | |
2849 | if (inst->operands[0].reg.regno != 0x1f | |
535b785f AM |
2850 | && (aarch64_wide_constant_p (value, is32, NULL) |
2851 | || aarch64_wide_constant_p (~value, is32, NULL))) | |
a06ea964 NC |
2852 | return 0; |
2853 | ||
2854 | inst->operands[2].type = AARCH64_OPND_NIL; | |
2855 | return 1; | |
2856 | } | |
2857 | ||
2858 | /* Some alias opcodes are disassembled by being converted from their real-form. | |
2859 | N.B. INST->OPCODE is the real opcode rather than the alias. */ | |
2860 | ||
2861 | static int | |
2862 | convert_to_alias (aarch64_inst *inst, const aarch64_opcode *alias) | |
2863 | { | |
2864 | switch (alias->op) | |
2865 | { | |
2866 | case OP_ASR_IMM: | |
2867 | case OP_LSR_IMM: | |
2868 | return convert_bfm_to_sr (inst); | |
2869 | case OP_LSL_IMM: | |
2870 | return convert_ubfm_to_lsl (inst); | |
2871 | case OP_CINC: | |
2872 | case OP_CINV: | |
2873 | case OP_CNEG: | |
2874 | return convert_from_csel (inst); | |
2875 | case OP_CSET: | |
2876 | case OP_CSETM: | |
2877 | return convert_csinc_to_cset (inst); | |
2878 | case OP_UBFX: | |
2879 | case OP_BFXIL: | |
2880 | case OP_SBFX: | |
2881 | return convert_bfm_to_bfx (inst); | |
2882 | case OP_SBFIZ: | |
2883 | case OP_BFI: | |
2884 | case OP_UBFIZ: | |
2885 | return convert_bfm_to_bfi (inst); | |
d685192a MW |
2886 | case OP_BFC: |
2887 | return convert_bfm_to_bfc (inst); | |
a06ea964 NC |
2888 | case OP_MOV_V: |
2889 | return convert_orr_to_mov (inst); | |
2890 | case OP_MOV_IMM_WIDE: | |
2891 | case OP_MOV_IMM_WIDEN: | |
2892 | return convert_movewide_to_mov (inst); | |
2893 | case OP_MOV_IMM_LOG: | |
2894 | return convert_movebitmask_to_mov (inst); | |
2895 | case OP_ROR_IMM: | |
2896 | return convert_extr_to_ror (inst); | |
e30181a5 YZ |
2897 | case OP_SXTL: |
2898 | case OP_SXTL2: | |
2899 | case OP_UXTL: | |
2900 | case OP_UXTL2: | |
2901 | return convert_shll_to_xtl (inst); | |
a06ea964 NC |
2902 | default: |
2903 | return 0; | |
2904 | } | |
2905 | } | |
2906 | ||
78933a4a | 2907 | static bool |
561a72d4 TC |
2908 | aarch64_opcode_decode (const aarch64_opcode *, const aarch64_insn, |
2909 | aarch64_inst *, int, aarch64_operand_error *errors); | |
a06ea964 NC |
2910 | |
2911 | /* Given the instruction information in *INST, check if the instruction has | |
2912 | any alias form that can be used to represent *INST. If the answer is yes, | |
2913 | update *INST to be in the form of the determined alias. */ | |
2914 | ||
2915 | /* In the opcode description table, the following flags are used in opcode | |
2916 | entries to help establish the relations between the real and alias opcodes: | |
2917 | ||
2918 | F_ALIAS: opcode is an alias | |
2919 | F_HAS_ALIAS: opcode has alias(es) | |
2920 | F_P1 | |
2921 | F_P2 | |
2922 | F_P3: Disassembly preference priority 1-3 (the larger the | |
2923 | higher). If nothing is specified, it is the priority | |
2924 | 0 by default, i.e. the lowest priority. | |
2925 | ||
2926 | Although the relation between the machine and the alias instructions are not | |
2927 | explicitly described, it can be easily determined from the base opcode | |
2928 | values, masks and the flags F_ALIAS and F_HAS_ALIAS in their opcode | |
2929 | description entries: | |
2930 | ||
2931 | The mask of an alias opcode must be equal to or a super-set (i.e. more | |
2932 | constrained) of that of the aliased opcode; so is the base opcode value. | |
2933 | ||
2934 | if (opcode_has_alias (real) && alias_opcode_p (opcode) | |
2935 | && (opcode->mask & real->mask) == real->mask | |
2936 | && (real->mask & opcode->opcode) == (real->mask & real->opcode)) | |
2937 | then OPCODE is an alias of, and only of, the REAL instruction | |
2938 | ||
2939 | The alias relationship is forced flat-structured to keep related algorithm | |
2940 | simple; an opcode entry cannot be flagged with both F_ALIAS and F_HAS_ALIAS. | |
2941 | ||
2942 | During the disassembling, the decoding decision tree (in | |
2943 | opcodes/aarch64-dis-2.c) always returns an machine instruction opcode entry; | |
2944 | if the decoding of such a machine instruction succeeds (and -Mno-aliases is | |
2945 | not specified), the disassembler will check whether there is any alias | |
2946 | instruction exists for this real instruction. If there is, the disassembler | |
2947 | will try to disassemble the 32-bit binary again using the alias's rule, or | |
2948 | try to convert the IR to the form of the alias. In the case of the multiple | |
2949 | aliases, the aliases are tried one by one from the highest priority | |
2950 | (currently the flag F_P3) to the lowest priority (no priority flag), and the | |
2951 | first succeeds first adopted. | |
2952 | ||
2953 | You may ask why there is a need for the conversion of IR from one form to | |
2954 | another in handling certain aliases. This is because on one hand it avoids | |
2955 | adding more operand code to handle unusual encoding/decoding; on other | |
2956 | hand, during the disassembling, the conversion is an effective approach to | |
2957 | check the condition of an alias (as an alias may be adopted only if certain | |
2958 | conditions are met). | |
2959 | ||
2960 | In order to speed up the alias opcode lookup, aarch64-gen has preprocessed | |
2961 | aarch64_opcode_table and generated aarch64_find_alias_opcode and | |
2962 | aarch64_find_next_alias_opcode (in opcodes/aarch64-dis-2.c) to help. */ | |
2963 | ||
2964 | static void | |
561a72d4 TC |
2965 | determine_disassembling_preference (struct aarch64_inst *inst, |
2966 | aarch64_operand_error *errors) | |
a06ea964 NC |
2967 | { |
2968 | const aarch64_opcode *opcode; | |
2969 | const aarch64_opcode *alias; | |
2970 | ||
2971 | opcode = inst->opcode; | |
2972 | ||
2973 | /* This opcode does not have an alias, so use itself. */ | |
535b785f | 2974 | if (!opcode_has_alias (opcode)) |
a06ea964 NC |
2975 | return; |
2976 | ||
2977 | alias = aarch64_find_alias_opcode (opcode); | |
2978 | assert (alias); | |
2979 | ||
2980 | #ifdef DEBUG_AARCH64 | |
2981 | if (debug_dump) | |
2982 | { | |
2983 | const aarch64_opcode *tmp = alias; | |
2984 | printf ("#### LIST orderd: "); | |
2985 | while (tmp) | |
2986 | { | |
2987 | printf ("%s, ", tmp->name); | |
2988 | tmp = aarch64_find_next_alias_opcode (tmp); | |
2989 | } | |
2990 | printf ("\n"); | |
2991 | } | |
2992 | #endif /* DEBUG_AARCH64 */ | |
2993 | ||
2994 | for (; alias; alias = aarch64_find_next_alias_opcode (alias)) | |
2995 | { | |
2996 | DEBUG_TRACE ("try %s", alias->name); | |
35822b38 | 2997 | assert (alias_opcode_p (alias) || opcode_has_alias (opcode)); |
a06ea964 NC |
2998 | |
2999 | /* An alias can be a pseudo opcode which will never be used in the | |
3000 | disassembly, e.g. BIC logical immediate is such a pseudo opcode | |
3001 | aliasing AND. */ | |
3002 | if (pseudo_opcode_p (alias)) | |
3003 | { | |
3004 | DEBUG_TRACE ("skip pseudo %s", alias->name); | |
3005 | continue; | |
3006 | } | |
3007 | ||
3008 | if ((inst->value & alias->mask) != alias->opcode) | |
3009 | { | |
3010 | DEBUG_TRACE ("skip %s as base opcode not match", alias->name); | |
3011 | continue; | |
3012 | } | |
95830c98 | 3013 | |
4abb672a | 3014 | if (!AARCH64_CPU_HAS_ALL_FEATURES (arch_variant, *alias->avariant)) |
95830c98 AC |
3015 | { |
3016 | DEBUG_TRACE ("skip %s: we're missing features", alias->name); | |
3017 | continue; | |
3018 | } | |
3019 | ||
a06ea964 NC |
3020 | /* No need to do any complicated transformation on operands, if the alias |
3021 | opcode does not have any operand. */ | |
3022 | if (aarch64_num_of_operands (alias) == 0 && alias->opcode == inst->value) | |
3023 | { | |
3024 | DEBUG_TRACE ("succeed with 0-operand opcode %s", alias->name); | |
3025 | aarch64_replace_opcode (inst, alias); | |
3026 | return; | |
3027 | } | |
3028 | if (alias->flags & F_CONV) | |
3029 | { | |
3030 | aarch64_inst copy; | |
3031 | memcpy (©, inst, sizeof (aarch64_inst)); | |
3032 | /* ALIAS is the preference as long as the instruction can be | |
3033 | successfully converted to the form of ALIAS. */ | |
3034 | if (convert_to_alias (©, alias) == 1) | |
3035 | { | |
3036 | aarch64_replace_opcode (©, alias); | |
7060c28e NC |
3037 | if (aarch64_match_operands_constraint (©, NULL) != 1) |
3038 | { | |
3039 | DEBUG_TRACE ("FAILED with alias %s ", alias->name); | |
3040 | } | |
3041 | else | |
3042 | { | |
3043 | DEBUG_TRACE ("succeed with %s via conversion", alias->name); | |
3044 | memcpy (inst, ©, sizeof (aarch64_inst)); | |
3045 | } | |
a06ea964 NC |
3046 | return; |
3047 | } | |
3048 | } | |
3049 | else | |
3050 | { | |
3051 | /* Directly decode the alias opcode. */ | |
3052 | aarch64_inst temp; | |
3053 | memset (&temp, '\0', sizeof (aarch64_inst)); | |
561a72d4 | 3054 | if (aarch64_opcode_decode (alias, inst->value, &temp, 1, errors) == 1) |
a06ea964 NC |
3055 | { |
3056 | DEBUG_TRACE ("succeed with %s via direct decoding", alias->name); | |
3057 | memcpy (inst, &temp, sizeof (aarch64_inst)); | |
3058 | return; | |
3059 | } | |
3060 | } | |
3061 | } | |
3062 | } | |
3063 | ||
116b6019 RS |
3064 | /* Some instructions (including all SVE ones) use the instruction class |
3065 | to describe how a qualifiers_list index is represented in the instruction | |
3066 | encoding. If INST is such an instruction, decode the appropriate fields | |
3067 | and fill in the operand qualifiers accordingly. Return true if no | |
3068 | problems are found. */ | |
3069 | ||
78933a4a | 3070 | static bool |
116b6019 RS |
3071 | aarch64_decode_variant_using_iclass (aarch64_inst *inst) |
3072 | { | |
3073 | int i, variant; | |
3074 | ||
3075 | variant = 0; | |
3076 | switch (inst->opcode->iclass) | |
3077 | { | |
a5791d58 | 3078 | case sme_mov: |
1d106042 | 3079 | variant = extract_fields (inst->value, 0, 2, FLD_SME_Q, FLD_SME_size_22); |
a5791d58 RS |
3080 | if (variant >= 4 && variant < 7) |
3081 | return false; | |
3082 | if (variant == 7) | |
3083 | variant = 4; | |
3084 | break; | |
3085 | ||
3086 | case sme_psel: | |
3087 | i = extract_fields (inst->value, 0, 2, FLD_SME_tszh, FLD_SME_tszl); | |
3088 | if (i == 0) | |
3089 | return false; | |
3090 | while ((i & 1) == 0) | |
3091 | { | |
3092 | i >>= 1; | |
3093 | variant += 1; | |
3094 | } | |
3095 | break; | |
cbd11b88 | 3096 | |
6efa6601 RS |
3097 | case sme_shift: |
3098 | i = extract_field (FLD_SVE_tszh, inst->value, 0); | |
3099 | goto sve_shift; | |
3100 | ||
cbd11b88 RS |
3101 | case sme_size_12_bhs: |
3102 | variant = extract_field (FLD_SME_size_12, inst->value, 0); | |
3103 | if (variant >= 3) | |
3104 | return false; | |
3105 | break; | |
3106 | ||
3107 | case sme_size_12_hs: | |
3108 | variant = extract_field (FLD_SME_size_12, inst->value, 0); | |
3109 | if (variant != 1 && variant != 2) | |
3110 | return false; | |
3111 | variant -= 1; | |
3112 | break; | |
a5791d58 | 3113 | |
d8773a8a RS |
3114 | case sme_size_22: |
3115 | variant = extract_field (FLD_SME_size_22, inst->value, 0); | |
3116 | break; | |
3117 | ||
27f6a0bd RS |
3118 | case sme_size_22_hsd: |
3119 | variant = extract_field (FLD_SME_size_22, inst->value, 0); | |
3120 | if (variant < 1) | |
3121 | return false; | |
3122 | variant -= 1; | |
3123 | break; | |
3124 | ||
ce623e7a RS |
3125 | case sme_sz_23: |
3126 | variant = extract_field (FLD_SME_sz_23, inst->value, 0); | |
3127 | break; | |
3128 | ||
116b6019 RS |
3129 | case sve_cpy: |
3130 | variant = extract_fields (inst->value, 0, 2, FLD_size, FLD_SVE_M_14); | |
3131 | break; | |
3132 | ||
3133 | case sve_index: | |
582e12bf RS |
3134 | i = extract_fields (inst->value, 0, 2, FLD_SVE_tszh, FLD_imm5); |
3135 | if ((i & 31) == 0) | |
78933a4a | 3136 | return false; |
116b6019 RS |
3137 | while ((i & 1) == 0) |
3138 | { | |
3139 | i >>= 1; | |
3140 | variant += 1; | |
3141 | } | |
3142 | break; | |
3143 | ||
3144 | case sve_limm: | |
3145 | /* Pick the smallest applicable element size. */ | |
3146 | if ((inst->value & 0x20600) == 0x600) | |
3147 | variant = 0; | |
3148 | else if ((inst->value & 0x20400) == 0x400) | |
3149 | variant = 1; | |
3150 | else if ((inst->value & 0x20000) == 0) | |
3151 | variant = 2; | |
3152 | else | |
3153 | variant = 3; | |
3154 | break; | |
3155 | ||
d8773a8a RS |
3156 | case sme2_mov: |
3157 | /* .D is preferred over the other sizes in disassembly. */ | |
3158 | variant = 3; | |
3159 | break; | |
3160 | ||
a5791d58 | 3161 | case sme_misc: |
116b6019 | 3162 | case sve_misc: |
a5791d58 | 3163 | /* These instructions have only a single variant. */ |
116b6019 RS |
3164 | break; |
3165 | ||
3166 | case sve_movprfx: | |
3167 | variant = extract_fields (inst->value, 0, 2, FLD_size, FLD_SVE_M_16); | |
3168 | break; | |
3169 | ||
3170 | case sve_pred_zm: | |
3171 | variant = extract_field (FLD_SVE_M_4, inst->value, 0); | |
3172 | break; | |
3173 | ||
3174 | case sve_shift_pred: | |
3175 | i = extract_fields (inst->value, 0, 2, FLD_SVE_tszh, FLD_SVE_tszl_8); | |
3176 | sve_shift: | |
3177 | if (i == 0) | |
78933a4a | 3178 | return false; |
116b6019 RS |
3179 | while (i != 1) |
3180 | { | |
3181 | i >>= 1; | |
3182 | variant += 1; | |
3183 | } | |
3184 | break; | |
3185 | ||
3186 | case sve_shift_unpred: | |
3187 | i = extract_fields (inst->value, 0, 2, FLD_SVE_tszh, FLD_SVE_tszl_19); | |
3188 | goto sve_shift; | |
3189 | ||
3190 | case sve_size_bhs: | |
3191 | variant = extract_field (FLD_size, inst->value, 0); | |
3192 | if (variant >= 3) | |
78933a4a | 3193 | return false; |
116b6019 RS |
3194 | break; |
3195 | ||
3196 | case sve_size_bhsd: | |
3197 | variant = extract_field (FLD_size, inst->value, 0); | |
3198 | break; | |
3199 | ||
3200 | case sve_size_hsd: | |
3201 | i = extract_field (FLD_size, inst->value, 0); | |
3202 | if (i < 1) | |
78933a4a | 3203 | return false; |
116b6019 RS |
3204 | variant = i - 1; |
3205 | break; | |
3206 | ||
e87ff672 RS |
3207 | case sme_fp_sd: |
3208 | case sme_int_sd: | |
3c705960 | 3209 | case sve_size_bh: |
116b6019 RS |
3210 | case sve_size_sd: |
3211 | variant = extract_field (FLD_SVE_sz, inst->value, 0); | |
3212 | break; | |
3213 | ||
0a57e14f MM |
3214 | case sve_size_sd2: |
3215 | variant = extract_field (FLD_SVE_sz2, inst->value, 0); | |
3216 | break; | |
3217 | ||
3bd82c86 MM |
3218 | case sve_size_hsd2: |
3219 | i = extract_field (FLD_SVE_size, inst->value, 0); | |
3220 | if (i < 1) | |
78933a4a | 3221 | return false; |
3bd82c86 MM |
3222 | variant = i - 1; |
3223 | break; | |
3224 | ||
41be57ca MM |
3225 | case sve_size_13: |
3226 | /* Ignore low bit of this field since that is set in the opcode for | |
3227 | instructions of this iclass. */ | |
3228 | i = (extract_field (FLD_size, inst->value, 0) & 2); | |
3229 | variant = (i >> 1); | |
cd50a87a MM |
3230 | break; |
3231 | ||
1be5f94f MM |
3232 | case sve_shift_tsz_bhsd: |
3233 | i = extract_fields (inst->value, 0, 2, FLD_SVE_tszh, FLD_SVE_tszl_19); | |
3234 | if (i == 0) | |
78933a4a | 3235 | return false; |
1be5f94f MM |
3236 | while (i != 1) |
3237 | { | |
3238 | i >>= 1; | |
3239 | variant += 1; | |
3240 | } | |
3241 | break; | |
3242 | ||
fd1dc4a0 MM |
3243 | case sve_size_tsz_bhs: |
3244 | i = extract_fields (inst->value, 0, 2, FLD_SVE_sz, FLD_SVE_tszl_19); | |
9d48687b | 3245 | if (i == 0) |
78933a4a | 3246 | return false; |
fd1dc4a0 MM |
3247 | while (i != 1) |
3248 | { | |
3249 | if (i & 1) | |
78933a4a | 3250 | return false; |
fd1dc4a0 MM |
3251 | i >>= 1; |
3252 | variant += 1; | |
3253 | } | |
3254 | break; | |
3255 | ||
3c17238b MM |
3256 | case sve_shift_tsz_hsd: |
3257 | i = extract_fields (inst->value, 0, 2, FLD_SVE_sz, FLD_SVE_tszl_19); | |
3258 | if (i == 0) | |
78933a4a | 3259 | return false; |
3c17238b MM |
3260 | while (i != 1) |
3261 | { | |
3262 | i >>= 1; | |
3263 | variant += 1; | |
3264 | } | |
3265 | break; | |
3266 | ||
116b6019 RS |
3267 | default: |
3268 | /* No mapping between instruction class and qualifiers. */ | |
78933a4a | 3269 | return true; |
116b6019 RS |
3270 | } |
3271 | ||
3272 | for (i = 0; i < AARCH64_MAX_OPND_NUM; ++i) | |
3273 | inst->operands[i].qualifier = inst->opcode->qualifiers_list[variant][i]; | |
78933a4a | 3274 | return true; |
116b6019 | 3275 | } |
a06ea964 NC |
3276 | /* Decode the CODE according to OPCODE; fill INST. Return 0 if the decoding |
3277 | fails, which meanes that CODE is not an instruction of OPCODE; otherwise | |
3278 | return 1. | |
3279 | ||
3280 | If OPCODE has alias(es) and NOALIASES_P is 0, an alias opcode may be | |
3281 | determined and used to disassemble CODE; this is done just before the | |
3282 | return. */ | |
3283 | ||
78933a4a | 3284 | static bool |
a06ea964 | 3285 | aarch64_opcode_decode (const aarch64_opcode *opcode, const aarch64_insn code, |
561a72d4 TC |
3286 | aarch64_inst *inst, int noaliases_p, |
3287 | aarch64_operand_error *errors) | |
a06ea964 NC |
3288 | { |
3289 | int i; | |
3290 | ||
3291 | DEBUG_TRACE ("enter with %s", opcode->name); | |
3292 | ||
3293 | assert (opcode && inst); | |
3294 | ||
b3ac5c6c TC |
3295 | /* Clear inst. */ |
3296 | memset (inst, '\0', sizeof (aarch64_inst)); | |
3297 | ||
a06ea964 NC |
3298 | /* Check the base opcode. */ |
3299 | if ((code & opcode->mask) != (opcode->opcode & opcode->mask)) | |
3300 | { | |
3301 | DEBUG_TRACE ("base opcode match FAIL"); | |
3302 | goto decode_fail; | |
3303 | } | |
3304 | ||
a06ea964 NC |
3305 | inst->opcode = opcode; |
3306 | inst->value = code; | |
3307 | ||
3308 | /* Assign operand codes and indexes. */ | |
3309 | for (i = 0; i < AARCH64_MAX_OPND_NUM; ++i) | |
3310 | { | |
3311 | if (opcode->operands[i] == AARCH64_OPND_NIL) | |
3312 | break; | |
3313 | inst->operands[i].type = opcode->operands[i]; | |
3314 | inst->operands[i].idx = i; | |
3315 | } | |
3316 | ||
3317 | /* Call the opcode decoder indicated by flags. */ | |
3318 | if (opcode_has_special_coder (opcode) && do_special_decoding (inst) == 0) | |
3319 | { | |
3320 | DEBUG_TRACE ("opcode flag-based decoder FAIL"); | |
3321 | goto decode_fail; | |
3322 | } | |
3323 | ||
116b6019 RS |
3324 | /* Possibly use the instruction class to determine the correct |
3325 | qualifier. */ | |
3326 | if (!aarch64_decode_variant_using_iclass (inst)) | |
3327 | { | |
3328 | DEBUG_TRACE ("iclass-based decoder FAIL"); | |
3329 | goto decode_fail; | |
3330 | } | |
3331 | ||
a06ea964 NC |
3332 | /* Call operand decoders. */ |
3333 | for (i = 0; i < AARCH64_MAX_OPND_NUM; ++i) | |
3334 | { | |
3335 | const aarch64_operand *opnd; | |
3336 | enum aarch64_opnd type; | |
4bd13cde | 3337 | |
a06ea964 NC |
3338 | type = opcode->operands[i]; |
3339 | if (type == AARCH64_OPND_NIL) | |
3340 | break; | |
3341 | opnd = &aarch64_operands[type]; | |
3342 | if (operand_has_extractor (opnd) | |
561a72d4 TC |
3343 | && (! aarch64_extract_operand (opnd, &inst->operands[i], code, inst, |
3344 | errors))) | |
a06ea964 NC |
3345 | { |
3346 | DEBUG_TRACE ("operand decoder FAIL at operand %d", i); | |
3347 | goto decode_fail; | |
3348 | } | |
3349 | } | |
3350 | ||
4bd13cde | 3351 | /* If the opcode has a verifier, then check it now. */ |
755b748f | 3352 | if (opcode->verifier |
78933a4a | 3353 | && opcode->verifier (inst, code, 0, false, errors, NULL) != ERR_OK) |
4bd13cde NC |
3354 | { |
3355 | DEBUG_TRACE ("operand verifier FAIL"); | |
3356 | goto decode_fail; | |
3357 | } | |
3358 | ||
a06ea964 NC |
3359 | /* Match the qualifiers. */ |
3360 | if (aarch64_match_operands_constraint (inst, NULL) == 1) | |
3361 | { | |
3362 | /* Arriving here, the CODE has been determined as a valid instruction | |
3363 | of OPCODE and *INST has been filled with information of this OPCODE | |
3364 | instruction. Before the return, check if the instruction has any | |
3365 | alias and should be disassembled in the form of its alias instead. | |
3366 | If the answer is yes, *INST will be updated. */ | |
3367 | if (!noaliases_p) | |
561a72d4 | 3368 | determine_disassembling_preference (inst, errors); |
a06ea964 | 3369 | DEBUG_TRACE ("SUCCESS"); |
78933a4a | 3370 | return true; |
a06ea964 NC |
3371 | } |
3372 | else | |
3373 | { | |
3374 | DEBUG_TRACE ("constraint matching FAIL"); | |
3375 | } | |
3376 | ||
dc1e8a47 | 3377 | decode_fail: |
78933a4a | 3378 | return false; |
a06ea964 NC |
3379 | } |
3380 | \f | |
3381 | /* This does some user-friendly fix-up to *INST. It is currently focus on | |
3382 | the adjustment of qualifiers to help the printed instruction | |
3383 | recognized/understood more easily. */ | |
3384 | ||
3385 | static void | |
3386 | user_friendly_fixup (aarch64_inst *inst) | |
3387 | { | |
3388 | switch (inst->opcode->iclass) | |
3389 | { | |
3390 | case testbranch: | |
3391 | /* TBNZ Xn|Wn, #uimm6, label | |
3392 | Test and Branch Not Zero: conditionally jumps to label if bit number | |
3393 | uimm6 in register Xn is not zero. The bit number implies the width of | |
3394 | the register, which may be written and should be disassembled as Wn if | |
3395 | uimm is less than 32. Limited to a branch offset range of +/- 32KiB. | |
3396 | */ | |
3397 | if (inst->operands[1].imm.value < 32) | |
3398 | inst->operands[0].qualifier = AARCH64_OPND_QLF_W; | |
3399 | break; | |
3400 | default: break; | |
3401 | } | |
3402 | } | |
3403 | ||
43cdf5ae YQ |
3404 | /* Decode INSN and fill in *INST the instruction information. An alias |
3405 | opcode may be filled in *INSN if NOALIASES_P is FALSE. Return zero on | |
3406 | success. */ | |
a06ea964 | 3407 | |
1d482394 | 3408 | enum err_type |
43cdf5ae | 3409 | aarch64_decode_insn (aarch64_insn insn, aarch64_inst *inst, |
78933a4a | 3410 | bool noaliases_p, |
561a72d4 | 3411 | aarch64_operand_error *errors) |
a06ea964 NC |
3412 | { |
3413 | const aarch64_opcode *opcode = aarch64_opcode_lookup (insn); | |
3414 | ||
3415 | #ifdef DEBUG_AARCH64 | |
3416 | if (debug_dump) | |
3417 | { | |
3418 | const aarch64_opcode *tmp = opcode; | |
3419 | printf ("\n"); | |
3420 | DEBUG_TRACE ("opcode lookup:"); | |
3421 | while (tmp != NULL) | |
3422 | { | |
3423 | aarch64_verbose (" %s", tmp->name); | |
3424 | tmp = aarch64_find_next_opcode (tmp); | |
3425 | } | |
3426 | } | |
3427 | #endif /* DEBUG_AARCH64 */ | |
3428 | ||
3429 | /* A list of opcodes may have been found, as aarch64_opcode_lookup cannot | |
3430 | distinguish some opcodes, e.g. SSHR and MOVI, which almost share the same | |
3431 | opcode field and value, apart from the difference that one of them has an | |
3432 | extra field as part of the opcode, but such a field is used for operand | |
3433 | encoding in other opcode(s) ('immh' in the case of the example). */ | |
3434 | while (opcode != NULL) | |
3435 | { | |
3436 | /* But only one opcode can be decoded successfully for, as the | |
3437 | decoding routine will check the constraint carefully. */ | |
561a72d4 | 3438 | if (aarch64_opcode_decode (opcode, insn, inst, noaliases_p, errors) == 1) |
a06ea964 NC |
3439 | return ERR_OK; |
3440 | opcode = aarch64_find_next_opcode (opcode); | |
3441 | } | |
3442 | ||
3443 | return ERR_UND; | |
3444 | } | |
3445 | ||
76a4c1e0 AB |
3446 | /* Return a short string to indicate a switch to STYLE. These strings |
3447 | will be embedded into the disassembled operand text (as produced by | |
3448 | aarch64_print_operand), and then spotted in the print_operands function | |
3449 | so that the disassembler output can be split by style. */ | |
3450 | ||
3451 | static const char * | |
3452 | get_style_text (enum disassembler_style style) | |
3453 | { | |
3454 | static bool init = false; | |
3455 | static char formats[16][4]; | |
3456 | unsigned num; | |
3457 | ||
3458 | /* First time through we build a string for every possible format. This | |
3459 | code relies on there being no more than 16 different styles (there's | |
3460 | an assert below for this). */ | |
3461 | if (!init) | |
3462 | { | |
3463 | int i; | |
3464 | ||
3465 | for (i = 0; i <= 0xf; ++i) | |
3466 | { | |
3467 | int res = snprintf (&formats[i][0], sizeof (formats[i]), "%c%x%c", | |
3468 | STYLE_MARKER_CHAR, i, STYLE_MARKER_CHAR); | |
3469 | assert (res == 3); | |
3470 | } | |
3471 | ||
3472 | init = true; | |
3473 | } | |
3474 | ||
3475 | /* Return the string that marks switching to STYLE. */ | |
3476 | num = (unsigned) style; | |
3477 | assert (style <= 0xf); | |
3478 | return formats[num]; | |
3479 | } | |
3480 | ||
3481 | /* Callback used by aarch64_print_operand to apply STYLE to the | |
3482 | disassembler output created from FMT and ARGS. The STYLER object holds | |
3483 | any required state. Must return a pointer to a string (created from FMT | |
3484 | and ARGS) that will continue to be valid until the complete disassembled | |
3485 | instruction has been printed. | |
3486 | ||
3487 | We return a string that includes two embedded style markers, the first, | |
3488 | places at the start of the string, indicates a switch to STYLE, and the | |
3489 | second, placed at the end of the string, indicates a switch back to the | |
3490 | default text style. | |
3491 | ||
3492 | Later, when we print the operand text we take care to collapse any | |
3493 | adjacent style markers, and to ignore any style markers that appear at | |
3494 | the very end of a complete operand string. */ | |
3495 | ||
3496 | static const char *aarch64_apply_style (struct aarch64_styler *styler, | |
3497 | enum disassembler_style style, | |
3498 | const char *fmt, | |
3499 | va_list args) | |
3500 | { | |
3501 | int res; | |
3502 | char *ptr, *tmp; | |
3503 | struct obstack *stack = (struct obstack *) styler->state; | |
3504 | va_list ap; | |
3505 | ||
3506 | /* These are the two strings for switching styles. */ | |
3507 | const char *style_on = get_style_text (style); | |
3508 | const char *style_off = get_style_text (dis_style_text); | |
3509 | ||
3510 | /* Calculate space needed once FMT and ARGS are expanded. */ | |
3511 | va_copy (ap, args); | |
3512 | res = vsnprintf (NULL, 0, fmt, ap); | |
3513 | va_end (ap); | |
3514 | assert (res >= 0); | |
3515 | ||
3516 | /* Allocate space on the obstack for the expanded FMT and ARGS, as well | |
3517 | as the two strings for switching styles, then write all of these | |
3518 | strings onto the obstack. */ | |
3519 | ptr = (char *) obstack_alloc (stack, res + strlen (style_on) | |
3520 | + strlen (style_off) + 1); | |
3521 | tmp = stpcpy (ptr, style_on); | |
3522 | res = vsnprintf (tmp, (res + 1), fmt, args); | |
3523 | assert (res >= 0); | |
3524 | tmp += res; | |
3525 | strcpy (tmp, style_off); | |
3526 | ||
3527 | return ptr; | |
3528 | } | |
3529 | ||
a06ea964 NC |
3530 | /* Print operands. */ |
3531 | ||
3532 | static void | |
3533 | print_operands (bfd_vma pc, const aarch64_opcode *opcode, | |
bde90be2 | 3534 | const aarch64_opnd_info *opnds, struct disassemble_info *info, |
78933a4a | 3535 | bool *has_notes) |
a06ea964 | 3536 | { |
7d02540a | 3537 | char *notes = NULL; |
bde90be2 | 3538 | int i, pcrel_p, num_printed; |
76a4c1e0 AB |
3539 | struct aarch64_styler styler; |
3540 | struct obstack content; | |
3541 | obstack_init (&content); | |
3542 | ||
3543 | styler.apply_style = aarch64_apply_style; | |
3544 | styler.state = (void *) &content; | |
3545 | ||
a06ea964 NC |
3546 | for (i = 0, num_printed = 0; i < AARCH64_MAX_OPND_NUM; ++i) |
3547 | { | |
0d2f91fe | 3548 | char str[128]; |
6837a663 AB |
3549 | char cmt[128]; |
3550 | ||
a06ea964 NC |
3551 | /* We regard the opcode operand info more, however we also look into |
3552 | the inst->operands to support the disassembling of the optional | |
3553 | operand. | |
3554 | The two operand code should be the same in all cases, apart from | |
3555 | when the operand can be optional. */ | |
3556 | if (opcode->operands[i] == AARCH64_OPND_NIL | |
3557 | || opnds[i].type == AARCH64_OPND_NIL) | |
3558 | break; | |
3559 | ||
3560 | /* Generate the operand string in STR. */ | |
0d2f91fe | 3561 | aarch64_print_operand (str, sizeof (str), pc, opcode, opnds, i, &pcrel_p, |
6837a663 | 3562 | &info->target, ¬es, cmt, sizeof (cmt), |
76a4c1e0 | 3563 | arch_variant, &styler); |
a06ea964 NC |
3564 | |
3565 | /* Print the delimiter (taking account of omitted operand(s)). */ | |
3566 | if (str[0] != '\0') | |
76a4c1e0 AB |
3567 | (*info->fprintf_styled_func) (info->stream, dis_style_text, "%s", |
3568 | num_printed++ == 0 ? "\t" : ", "); | |
a06ea964 NC |
3569 | |
3570 | /* Print the operand. */ | |
3571 | if (pcrel_p) | |
3572 | (*info->print_address_func) (info->target, info); | |
3573 | else | |
6837a663 | 3574 | { |
76a4c1e0 AB |
3575 | /* This operand came from aarch64_print_operand, and will include |
3576 | embedded strings indicating which style each character should | |
3577 | have. In the following code we split the text based on | |
3578 | CURR_STYLE, and call the styled print callback to print each | |
3579 | block of text in the appropriate style. */ | |
3580 | char *start, *curr; | |
3581 | enum disassembler_style curr_style = dis_style_text; | |
3582 | ||
3583 | start = curr = str; | |
3584 | do | |
3585 | { | |
3586 | if (*curr == '\0' | |
3587 | || (*curr == STYLE_MARKER_CHAR | |
3588 | && ISXDIGIT (*(curr + 1)) | |
3589 | && *(curr + 2) == STYLE_MARKER_CHAR)) | |
3590 | { | |
3591 | /* Output content between our START position and CURR. */ | |
3592 | int len = curr - start; | |
3593 | if (len > 0) | |
3594 | { | |
3595 | if ((*info->fprintf_styled_func) (info->stream, | |
3596 | curr_style, | |
3597 | "%.*s", | |
3598 | len, start) < 0) | |
3599 | break; | |
3600 | } | |
3601 | ||
3602 | if (*curr == '\0') | |
3603 | break; | |
3604 | ||
3605 | /* Skip over the initial STYLE_MARKER_CHAR. */ | |
3606 | ++curr; | |
3607 | ||
3608 | /* Update the CURR_STYLE. As there are less than 16 | |
3609 | styles, it is possible, that if the input is corrupted | |
3610 | in some way, that we might set CURR_STYLE to an | |
3611 | invalid value. Don't worry though, we check for this | |
3612 | situation. */ | |
3613 | if (*curr >= '0' && *curr <= '9') | |
3614 | curr_style = (enum disassembler_style) (*curr - '0'); | |
3615 | else if (*curr >= 'a' && *curr <= 'f') | |
3616 | curr_style = (enum disassembler_style) (*curr - 'a' + 10); | |
3617 | else | |
3618 | curr_style = dis_style_text; | |
3619 | ||
3620 | /* Check for an invalid style having been selected. This | |
3621 | should never happen, but it doesn't hurt to be a | |
3622 | little paranoid. */ | |
3623 | if (curr_style > dis_style_comment_start) | |
3624 | curr_style = dis_style_text; | |
3625 | ||
3626 | /* Skip the hex character, and the closing STYLE_MARKER_CHAR. */ | |
3627 | curr += 2; | |
3628 | ||
3629 | /* Reset the START to after the style marker. */ | |
3630 | start = curr; | |
3631 | } | |
3632 | else | |
3633 | ++curr; | |
3634 | } | |
3635 | while (true); | |
6837a663 | 3636 | } |
76a4c1e0 AB |
3637 | |
3638 | /* Print the comment. This works because only the last operand ever | |
3639 | adds a comment. If that ever changes then we'll need to be | |
3640 | smarter here. */ | |
3641 | if (cmt[0] != '\0') | |
3642 | (*info->fprintf_styled_func) (info->stream, dis_style_comment_start, | |
3643 | "\t// %s", cmt); | |
a06ea964 | 3644 | } |
7d02540a TC |
3645 | |
3646 | if (notes && !no_notes) | |
bde90be2 | 3647 | { |
78933a4a | 3648 | *has_notes = true; |
76a4c1e0 AB |
3649 | (*info->fprintf_styled_func) (info->stream, dis_style_comment_start, |
3650 | " // note: %s", notes); | |
bde90be2 | 3651 | } |
76a4c1e0 AB |
3652 | |
3653 | obstack_free (&content, NULL); | |
a06ea964 NC |
3654 | } |
3655 | ||
bb7eff52 RS |
3656 | /* Set NAME to a copy of INST's mnemonic with the "." suffix removed. */ |
3657 | ||
3658 | static void | |
3659 | remove_dot_suffix (char *name, const aarch64_inst *inst) | |
3660 | { | |
3661 | char *ptr; | |
3662 | size_t len; | |
3663 | ||
3664 | ptr = strchr (inst->opcode->name, '.'); | |
3665 | assert (ptr && inst->cond); | |
3666 | len = ptr - inst->opcode->name; | |
3667 | assert (len < 8); | |
3668 | strncpy (name, inst->opcode->name, len); | |
3669 | name[len] = '\0'; | |
3670 | } | |
3671 | ||
a06ea964 NC |
3672 | /* Print the instruction mnemonic name. */ |
3673 | ||
3674 | static void | |
3675 | print_mnemonic_name (const aarch64_inst *inst, struct disassemble_info *info) | |
3676 | { | |
3677 | if (inst->opcode->flags & F_COND) | |
3678 | { | |
3679 | /* For instructions that are truly conditionally executed, e.g. b.cond, | |
3680 | prepare the full mnemonic name with the corresponding condition | |
3681 | suffix. */ | |
bb7eff52 RS |
3682 | char name[8]; |
3683 | ||
3684 | remove_dot_suffix (name, inst); | |
76a4c1e0 AB |
3685 | (*info->fprintf_styled_func) (info->stream, dis_style_mnemonic, |
3686 | "%s.%s", name, inst->cond->names[0]); | |
a06ea964 NC |
3687 | } |
3688 | else | |
76a4c1e0 AB |
3689 | (*info->fprintf_styled_func) (info->stream, dis_style_mnemonic, |
3690 | "%s", inst->opcode->name); | |
a06ea964 NC |
3691 | } |
3692 | ||
bb7eff52 RS |
3693 | /* Decide whether we need to print a comment after the operands of |
3694 | instruction INST. */ | |
3695 | ||
3696 | static void | |
3697 | print_comment (const aarch64_inst *inst, struct disassemble_info *info) | |
3698 | { | |
3699 | if (inst->opcode->flags & F_COND) | |
3700 | { | |
3701 | char name[8]; | |
3702 | unsigned int i, num_conds; | |
3703 | ||
3704 | remove_dot_suffix (name, inst); | |
3705 | num_conds = ARRAY_SIZE (inst->cond->names); | |
3706 | for (i = 1; i < num_conds && inst->cond->names[i]; ++i) | |
76a4c1e0 AB |
3707 | (*info->fprintf_styled_func) (info->stream, dis_style_comment_start, |
3708 | "%s %s.%s", | |
3709 | i == 1 ? " //" : ",", | |
3710 | name, inst->cond->names[i]); | |
bb7eff52 RS |
3711 | } |
3712 | } | |
3713 | ||
bde90be2 TC |
3714 | /* Build notes from verifiers into a string for printing. */ |
3715 | ||
3716 | static void | |
3717 | print_verifier_notes (aarch64_operand_error *detail, | |
3718 | struct disassemble_info *info) | |
3719 | { | |
3720 | if (no_notes) | |
3721 | return; | |
3722 | ||
3723 | /* The output of the verifier cannot be a fatal error, otherwise the assembly | |
3724 | would not have succeeded. We can safely ignore these. */ | |
3725 | assert (detail->non_fatal); | |
bde90be2 | 3726 | |
76a4c1e0 AB |
3727 | (*info->fprintf_styled_func) (info->stream, dis_style_comment_start, |
3728 | " // note: "); | |
63eff947 RS |
3729 | switch (detail->kind) |
3730 | { | |
3731 | case AARCH64_OPDE_A_SHOULD_FOLLOW_B: | |
76a4c1e0 AB |
3732 | (*info->fprintf_styled_func) (info->stream, dis_style_text, |
3733 | _("this `%s' should have an immediately" | |
3734 | " preceding `%s'"), | |
3735 | detail->data[0].s, detail->data[1].s); | |
63eff947 RS |
3736 | break; |
3737 | ||
3738 | case AARCH64_OPDE_EXPECTED_A_AFTER_B: | |
76a4c1e0 AB |
3739 | (*info->fprintf_styled_func) (info->stream, dis_style_text, |
3740 | _("expected `%s' after previous `%s'"), | |
3741 | detail->data[0].s, detail->data[1].s); | |
63eff947 RS |
3742 | break; |
3743 | ||
3744 | default: | |
69ce6091 | 3745 | assert (detail->error); |
76a4c1e0 AB |
3746 | (*info->fprintf_styled_func) (info->stream, dis_style_text, |
3747 | "%s", detail->error); | |
63eff947 | 3748 | if (detail->index >= 0) |
76a4c1e0 AB |
3749 | (*info->fprintf_styled_func) (info->stream, dis_style_text, |
3750 | " at operand %d", detail->index + 1); | |
63eff947 RS |
3751 | break; |
3752 | } | |
bde90be2 TC |
3753 | } |
3754 | ||
a06ea964 NC |
3755 | /* Print the instruction according to *INST. */ |
3756 | ||
3757 | static void | |
3758 | print_aarch64_insn (bfd_vma pc, const aarch64_inst *inst, | |
bde90be2 TC |
3759 | const aarch64_insn code, |
3760 | struct disassemble_info *info, | |
3761 | aarch64_operand_error *mismatch_details) | |
a06ea964 | 3762 | { |
78933a4a | 3763 | bool has_notes = false; |
bde90be2 | 3764 | |
a06ea964 | 3765 | print_mnemonic_name (inst, info); |
bde90be2 | 3766 | print_operands (pc, inst->opcode, inst->operands, info, &has_notes); |
bb7eff52 | 3767 | print_comment (inst, info); |
bde90be2 TC |
3768 | |
3769 | /* We've already printed a note, not enough space to print more so exit. | |
3770 | Usually notes shouldn't overlap so it shouldn't happen that we have a note | |
3771 | from a register and instruction at the same time. */ | |
3772 | if (has_notes) | |
3773 | return; | |
3774 | ||
3775 | /* Always run constraint verifiers, this is needed because constraints need to | |
3776 | maintain a global state regardless of whether the instruction has the flag | |
3777 | set or not. */ | |
78933a4a | 3778 | enum err_type result = verify_constraints (inst, code, pc, false, |
bde90be2 TC |
3779 | mismatch_details, &insn_sequence); |
3780 | switch (result) | |
3781 | { | |
bde90be2 TC |
3782 | case ERR_VFI: |
3783 | print_verifier_notes (mismatch_details, info); | |
3784 | break; | |
7060c28e NC |
3785 | case ERR_UND: |
3786 | case ERR_UNP: | |
3787 | case ERR_NYI: | |
bde90be2 TC |
3788 | default: |
3789 | break; | |
3790 | } | |
a06ea964 NC |
3791 | } |
3792 | ||
3793 | /* Entry-point of the instruction disassembler and printer. */ | |
3794 | ||
3795 | static void | |
3796 | print_insn_aarch64_word (bfd_vma pc, | |
3797 | uint32_t word, | |
561a72d4 TC |
3798 | struct disassemble_info *info, |
3799 | aarch64_operand_error *errors) | |
a06ea964 | 3800 | { |
1d482394 | 3801 | static const char *err_msg[ERR_NR_ENTRIES+1] = |
a06ea964 | 3802 | { |
1d482394 TC |
3803 | [ERR_OK] = "_", |
3804 | [ERR_UND] = "undefined", | |
3805 | [ERR_UNP] = "unpredictable", | |
3806 | [ERR_NYI] = "NYI" | |
a06ea964 NC |
3807 | }; |
3808 | ||
1d482394 | 3809 | enum err_type ret; |
a06ea964 NC |
3810 | aarch64_inst inst; |
3811 | ||
3812 | info->insn_info_valid = 1; | |
3813 | info->branch_delay_insns = 0; | |
3814 | info->data_size = 0; | |
3815 | info->target = 0; | |
3816 | info->target2 = 0; | |
3817 | ||
3818 | if (info->flags & INSN_HAS_RELOC) | |
3819 | /* If the instruction has a reloc associated with it, then | |
3820 | the offset field in the instruction will actually be the | |
3821 | addend for the reloc. (If we are using REL type relocs). | |
3822 | In such cases, we can ignore the pc when computing | |
3823 | addresses, since the addend is not currently pc-relative. */ | |
3824 | pc = 0; | |
3825 | ||
561a72d4 | 3826 | ret = aarch64_decode_insn (word, &inst, no_aliases, errors); |
a06ea964 NC |
3827 | |
3828 | if (((word >> 21) & 0x3ff) == 1) | |
3829 | { | |
3830 | /* RESERVED for ALES. */ | |
3831 | assert (ret != ERR_OK); | |
3832 | ret = ERR_NYI; | |
3833 | } | |
3834 | ||
3835 | switch (ret) | |
3836 | { | |
3837 | case ERR_UND: | |
3838 | case ERR_UNP: | |
3839 | case ERR_NYI: | |
3840 | /* Handle undefined instructions. */ | |
3841 | info->insn_type = dis_noninsn; | |
76a4c1e0 AB |
3842 | (*info->fprintf_styled_func) (info->stream, |
3843 | dis_style_assembler_directive, | |
3844 | ".inst\t"); | |
3845 | (*info->fprintf_styled_func) (info->stream, dis_style_immediate, | |
3846 | "0x%08x", word); | |
3847 | (*info->fprintf_styled_func) (info->stream, dis_style_comment_start, | |
3848 | " ; %s", err_msg[ret]); | |
a06ea964 NC |
3849 | break; |
3850 | case ERR_OK: | |
3851 | user_friendly_fixup (&inst); | |
92c713d7 VM |
3852 | if (inst.opcode->iclass == condbranch |
3853 | || inst.opcode->iclass == testbranch | |
3854 | || inst.opcode->iclass == compbranch) | |
3855 | info->insn_type = dis_condbranch; | |
3856 | else if (inst.opcode->iclass == branch_imm) | |
3857 | info->insn_type = dis_jsr; | |
bde90be2 | 3858 | print_aarch64_insn (pc, &inst, word, info, errors); |
a06ea964 NC |
3859 | break; |
3860 | default: | |
3861 | abort (); | |
3862 | } | |
3863 | } | |
3864 | ||
3865 | /* Disallow mapping symbols ($x, $d etc) from | |
3866 | being displayed in symbol relative addresses. */ | |
3867 | ||
78933a4a | 3868 | bool |
a06ea964 NC |
3869 | aarch64_symbol_is_valid (asymbol * sym, |
3870 | struct disassemble_info * info ATTRIBUTE_UNUSED) | |
3871 | { | |
3872 | const char * name; | |
3873 | ||
3874 | if (sym == NULL) | |
78933a4a | 3875 | return false; |
a06ea964 NC |
3876 | |
3877 | name = bfd_asymbol_name (sym); | |
3878 | ||
3879 | return name | |
3880 | && (name[0] != '$' | |
3881 | || (name[1] != 'x' && name[1] != 'd') | |
3882 | || (name[2] != '\0' && name[2] != '.')); | |
3883 | } | |
3884 | ||
3885 | /* Print data bytes on INFO->STREAM. */ | |
3886 | ||
3887 | static void | |
3888 | print_insn_data (bfd_vma pc ATTRIBUTE_UNUSED, | |
3889 | uint32_t word, | |
561a72d4 TC |
3890 | struct disassemble_info *info, |
3891 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
3892 | { |
3893 | switch (info->bytes_per_chunk) | |
3894 | { | |
3895 | case 1: | |
76a4c1e0 AB |
3896 | info->fprintf_styled_func (info->stream, dis_style_assembler_directive, |
3897 | ".byte\t"); | |
3898 | info->fprintf_styled_func (info->stream, dis_style_immediate, | |
3899 | "0x%02x", word); | |
a06ea964 NC |
3900 | break; |
3901 | case 2: | |
76a4c1e0 AB |
3902 | info->fprintf_styled_func (info->stream, dis_style_assembler_directive, |
3903 | ".short\t"); | |
3904 | info->fprintf_styled_func (info->stream, dis_style_immediate, | |
3905 | "0x%04x", word); | |
a06ea964 NC |
3906 | break; |
3907 | case 4: | |
76a4c1e0 AB |
3908 | info->fprintf_styled_func (info->stream, dis_style_assembler_directive, |
3909 | ".word\t"); | |
3910 | info->fprintf_styled_func (info->stream, dis_style_immediate, | |
3911 | "0x%08x", word); | |
a06ea964 NC |
3912 | break; |
3913 | default: | |
3914 | abort (); | |
3915 | } | |
3916 | } | |
3917 | ||
3918 | /* Try to infer the code or data type from a symbol. | |
3919 | Returns nonzero if *MAP_TYPE was set. */ | |
3920 | ||
3921 | static int | |
3922 | get_sym_code_type (struct disassemble_info *info, int n, | |
3923 | enum map_type *map_type) | |
3924 | { | |
ccf61261 | 3925 | asymbol * as; |
a06ea964 NC |
3926 | elf_symbol_type *es; |
3927 | unsigned int type; | |
3928 | const char *name; | |
3929 | ||
4c5ae11b RL |
3930 | /* If the symbol is in a different section, ignore it. */ |
3931 | if (info->section != NULL && info->section != info->symtab[n]->section) | |
78933a4a | 3932 | return false; |
4c5ae11b | 3933 | |
ccf61261 | 3934 | if (n >= info->symtab_size) |
78933a4a | 3935 | return false; |
ccf61261 NC |
3936 | |
3937 | as = info->symtab[n]; | |
3938 | if (bfd_asymbol_flavour (as) != bfd_target_elf_flavour) | |
78933a4a | 3939 | return false; |
ccf61261 NC |
3940 | es = (elf_symbol_type *) as; |
3941 | ||
a06ea964 NC |
3942 | type = ELF_ST_TYPE (es->internal_elf_sym.st_info); |
3943 | ||
3944 | /* If the symbol has function type then use that. */ | |
3945 | if (type == STT_FUNC) | |
3946 | { | |
3947 | *map_type = MAP_INSN; | |
78933a4a | 3948 | return true; |
a06ea964 NC |
3949 | } |
3950 | ||
3951 | /* Check for mapping symbols. */ | |
3952 | name = bfd_asymbol_name(info->symtab[n]); | |
3953 | if (name[0] == '$' | |
3954 | && (name[1] == 'x' || name[1] == 'd') | |
3955 | && (name[2] == '\0' || name[2] == '.')) | |
3956 | { | |
3957 | *map_type = (name[1] == 'x' ? MAP_INSN : MAP_DATA); | |
78933a4a | 3958 | return true; |
a06ea964 NC |
3959 | } |
3960 | ||
78933a4a | 3961 | return false; |
a06ea964 NC |
3962 | } |
3963 | ||
95830c98 AC |
3964 | /* Set the feature bits in arch_variant in order to get the correct disassembly |
3965 | for the chosen architecture variant. | |
3966 | ||
3967 | Currently we only restrict disassembly for Armv8-R and otherwise enable all | |
3968 | non-R-profile features. */ | |
3969 | static void | |
3970 | select_aarch64_variant (unsigned mach) | |
3971 | { | |
3972 | switch (mach) | |
3973 | { | |
3974 | case bfd_mach_aarch64_8R: | |
4abb672a | 3975 | AARCH64_SET_FEATURE (arch_variant, AARCH64_ARCH_V8R); |
95830c98 AC |
3976 | break; |
3977 | default: | |
4abb672a RS |
3978 | arch_variant = (aarch64_feature_set) AARCH64_ALL_FEATURES; |
3979 | AARCH64_CLEAR_FEATURE (arch_variant, arch_variant, V8R); | |
95830c98 AC |
3980 | } |
3981 | } | |
3982 | ||
a06ea964 NC |
3983 | /* Entry-point of the AArch64 disassembler. */ |
3984 | ||
3985 | int | |
3986 | print_insn_aarch64 (bfd_vma pc, | |
3987 | struct disassemble_info *info) | |
3988 | { | |
3989 | bfd_byte buffer[INSNLEN]; | |
3990 | int status; | |
561a72d4 TC |
3991 | void (*printer) (bfd_vma, uint32_t, struct disassemble_info *, |
3992 | aarch64_operand_error *); | |
78933a4a | 3993 | bool found = false; |
a06ea964 NC |
3994 | unsigned int size = 4; |
3995 | unsigned long data; | |
561a72d4 | 3996 | aarch64_operand_error errors; |
78933a4a | 3997 | static bool set_features; |
a06ea964 NC |
3998 | |
3999 | if (info->disassembler_options) | |
4000 | { | |
4001 | set_default_aarch64_dis_options (info); | |
4002 | ||
4003 | parse_aarch64_dis_options (info->disassembler_options); | |
4004 | ||
4005 | /* To avoid repeated parsing of these options, we remove them here. */ | |
4006 | info->disassembler_options = NULL; | |
4007 | } | |
4008 | ||
95830c98 AC |
4009 | if (!set_features) |
4010 | { | |
4011 | select_aarch64_variant (info->mach); | |
78933a4a | 4012 | set_features = true; |
95830c98 AC |
4013 | } |
4014 | ||
a06ea964 NC |
4015 | /* Aarch64 instructions are always little-endian */ |
4016 | info->endian_code = BFD_ENDIAN_LITTLE; | |
4017 | ||
51457761 TC |
4018 | /* Default to DATA. A text section is required by the ABI to contain an |
4019 | INSN mapping symbol at the start. A data section has no such | |
4020 | requirement, hence if no mapping symbol is found the section must | |
4021 | contain only data. This however isn't very useful if the user has | |
4022 | fully stripped the binaries. If this is the case use the section | |
4023 | attributes to determine the default. If we have no section default to | |
4024 | INSN as well, as we may be disassembling some raw bytes on a baremetal | |
4025 | HEX file or similar. */ | |
4026 | enum map_type type = MAP_DATA; | |
4027 | if ((info->section && info->section->flags & SEC_CODE) || !info->section) | |
4028 | type = MAP_INSN; | |
4029 | ||
a06ea964 NC |
4030 | /* First check the full symtab for a mapping symbol, even if there |
4031 | are no usable non-mapping symbols for this address. */ | |
4032 | if (info->symtab_size != 0 | |
4033 | && bfd_asymbol_flavour (*info->symtab) == bfd_target_elf_flavour) | |
4034 | { | |
a06ea964 | 4035 | int last_sym = -1; |
51457761 | 4036 | bfd_vma addr, section_vma = 0; |
78933a4a | 4037 | bool can_use_search_opt_p; |
a06ea964 NC |
4038 | int n; |
4039 | ||
4040 | if (pc <= last_mapping_addr) | |
4041 | last_mapping_sym = -1; | |
4042 | ||
4043 | /* Start scanning at the start of the function, or wherever | |
4044 | we finished last time. */ | |
4045 | n = info->symtab_pos + 1; | |
51457761 | 4046 | |
53b2f36b TC |
4047 | /* If the last stop offset is different from the current one it means we |
4048 | are disassembling a different glob of bytes. As such the optimization | |
4049 | would not be safe and we should start over. */ | |
51457761 TC |
4050 | can_use_search_opt_p = last_mapping_sym >= 0 |
4051 | && info->stop_offset == last_stop_offset; | |
4052 | ||
4053 | if (n >= last_mapping_sym && can_use_search_opt_p) | |
a06ea964 NC |
4054 | n = last_mapping_sym; |
4055 | ||
51457761 TC |
4056 | /* Look down while we haven't passed the location being disassembled. |
4057 | The reason for this is that there's no defined order between a symbol | |
4058 | and an mapping symbol that may be at the same address. We may have to | |
4059 | look at least one position ahead. */ | |
a06ea964 NC |
4060 | for (; n < info->symtab_size; n++) |
4061 | { | |
4062 | addr = bfd_asymbol_value (info->symtab[n]); | |
4063 | if (addr > pc) | |
4064 | break; | |
4c5ae11b | 4065 | if (get_sym_code_type (info, n, &type)) |
a06ea964 NC |
4066 | { |
4067 | last_sym = n; | |
78933a4a | 4068 | found = true; |
a06ea964 NC |
4069 | } |
4070 | } | |
4071 | ||
4072 | if (!found) | |
4073 | { | |
4074 | n = info->symtab_pos; | |
51457761 | 4075 | if (n >= last_mapping_sym && can_use_search_opt_p) |
a06ea964 NC |
4076 | n = last_mapping_sym; |
4077 | ||
4078 | /* No mapping symbol found at this address. Look backwards | |
51457761 TC |
4079 | for a preceeding one, but don't go pass the section start |
4080 | otherwise a data section with no mapping symbol can pick up | |
4081 | a text mapping symbol of a preceeding section. The documentation | |
4082 | says section can be NULL, in which case we will seek up all the | |
4083 | way to the top. */ | |
4084 | if (info->section) | |
4085 | section_vma = info->section->vma; | |
4086 | ||
a06ea964 NC |
4087 | for (; n >= 0; n--) |
4088 | { | |
51457761 TC |
4089 | addr = bfd_asymbol_value (info->symtab[n]); |
4090 | if (addr < section_vma) | |
4091 | break; | |
4092 | ||
a06ea964 NC |
4093 | if (get_sym_code_type (info, n, &type)) |
4094 | { | |
4095 | last_sym = n; | |
78933a4a | 4096 | found = true; |
a06ea964 NC |
4097 | break; |
4098 | } | |
4099 | } | |
4100 | } | |
4101 | ||
4102 | last_mapping_sym = last_sym; | |
4103 | last_type = type; | |
53b2f36b | 4104 | last_stop_offset = info->stop_offset; |
a06ea964 NC |
4105 | |
4106 | /* Look a little bit ahead to see if we should print out | |
4107 | less than four bytes of data. If there's a symbol, | |
4108 | mapping or otherwise, after two bytes then don't | |
4109 | print more. */ | |
4110 | if (last_type == MAP_DATA) | |
4111 | { | |
4112 | size = 4 - (pc & 3); | |
4113 | for (n = last_sym + 1; n < info->symtab_size; n++) | |
4114 | { | |
4115 | addr = bfd_asymbol_value (info->symtab[n]); | |
4116 | if (addr > pc) | |
4117 | { | |
4118 | if (addr - pc < size) | |
4119 | size = addr - pc; | |
4120 | break; | |
4121 | } | |
4122 | } | |
4123 | /* If the next symbol is after three bytes, we need to | |
4124 | print only part of the data, so that we can use either | |
4125 | .byte or .short. */ | |
4126 | if (size == 3) | |
4127 | size = (pc & 1) ? 1 : 2; | |
4128 | } | |
4129 | } | |
51457761 TC |
4130 | else |
4131 | last_type = type; | |
a06ea964 | 4132 | |
60df3720 TC |
4133 | /* PR 10263: Disassemble data if requested to do so by the user. */ |
4134 | if (last_type == MAP_DATA && ((info->flags & DISASSEMBLE_DATA) == 0)) | |
a06ea964 NC |
4135 | { |
4136 | /* size was set above. */ | |
4137 | info->bytes_per_chunk = size; | |
4138 | info->display_endian = info->endian; | |
4139 | printer = print_insn_data; | |
4140 | } | |
4141 | else | |
4142 | { | |
4143 | info->bytes_per_chunk = size = INSNLEN; | |
4144 | info->display_endian = info->endian_code; | |
4145 | printer = print_insn_aarch64_word; | |
4146 | } | |
4147 | ||
4148 | status = (*info->read_memory_func) (pc, buffer, size, info); | |
4149 | if (status != 0) | |
4150 | { | |
4151 | (*info->memory_error_func) (status, pc, info); | |
4152 | return -1; | |
4153 | } | |
4154 | ||
4155 | data = bfd_get_bits (buffer, size * 8, | |
4156 | info->display_endian == BFD_ENDIAN_BIG); | |
4157 | ||
561a72d4 | 4158 | (*printer) (pc, data, info, &errors); |
a06ea964 NC |
4159 | |
4160 | return size; | |
4161 | } | |
4162 | \f | |
4163 | void | |
4164 | print_aarch64_disassembler_options (FILE *stream) | |
4165 | { | |
4166 | fprintf (stream, _("\n\ | |
4167 | The following AARCH64 specific disassembler options are supported for use\n\ | |
4168 | with the -M switch (multiple options should be separated by commas):\n")); | |
4169 | ||
4170 | fprintf (stream, _("\n\ | |
4171 | no-aliases Don't print instruction aliases.\n")); | |
4172 | ||
4173 | fprintf (stream, _("\n\ | |
4174 | aliases Do print instruction aliases.\n")); | |
4175 | ||
7d02540a TC |
4176 | fprintf (stream, _("\n\ |
4177 | no-notes Don't print instruction notes.\n")); | |
4178 | ||
4179 | fprintf (stream, _("\n\ | |
4180 | notes Do print instruction notes.\n")); | |
4181 | ||
a06ea964 NC |
4182 | #ifdef DEBUG_AARCH64 |
4183 | fprintf (stream, _("\n\ | |
4184 | debug_dump Temp switch for debug trace.\n")); | |
4185 | #endif /* DEBUG_AARCH64 */ | |
4186 | ||
4187 | fprintf (stream, _("\n")); | |
4188 | } |