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a06ea964 | 1 | /* aarch64-dis.c -- AArch64 disassembler. |
d87bef3a | 2 | Copyright (C) 2009-2023 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 | ||
b5464a68 RS |
171 | /* Extract the value of all fields in SELF->fields from instruction CODE. |
172 | The least significant bit comes from the final field. */ | |
173 | ||
174 | static aarch64_insn | |
175 | extract_all_fields (const aarch64_operand *self, aarch64_insn code) | |
176 | { | |
177 | aarch64_insn value; | |
178 | unsigned int i; | |
179 | enum aarch64_field_kind kind; | |
180 | ||
181 | value = 0; | |
182 | for (i = 0; i < ARRAY_SIZE (self->fields) && self->fields[i] != FLD_NIL; ++i) | |
183 | { | |
184 | kind = self->fields[i]; | |
185 | value <<= fields[kind].width; | |
186 | value |= extract_field (kind, code, 0); | |
187 | } | |
188 | return value; | |
189 | } | |
190 | ||
a06ea964 | 191 | /* Sign-extend bit I of VALUE. */ |
f81e7e2d | 192 | static inline uint64_t |
a06ea964 NC |
193 | sign_extend (aarch64_insn value, unsigned i) |
194 | { | |
f81e7e2d | 195 | uint64_t ret, sign; |
a06ea964 NC |
196 | |
197 | assert (i < 32); | |
f81e7e2d AM |
198 | ret = value; |
199 | sign = (uint64_t) 1 << i; | |
200 | return ((ret & (sign + sign - 1)) ^ sign) - sign; | |
a06ea964 NC |
201 | } |
202 | ||
203 | /* N.B. the following inline helpfer functions create a dependency on the | |
204 | order of operand qualifier enumerators. */ | |
205 | ||
206 | /* Given VALUE, return qualifier for a general purpose register. */ | |
207 | static inline enum aarch64_opnd_qualifier | |
208 | get_greg_qualifier_from_value (aarch64_insn value) | |
209 | { | |
210 | enum aarch64_opnd_qualifier qualifier = AARCH64_OPND_QLF_W + value; | |
211 | assert (value <= 0x1 | |
212 | && aarch64_get_qualifier_standard_value (qualifier) == value); | |
213 | return qualifier; | |
214 | } | |
215 | ||
3067d3b9 MW |
216 | /* Given VALUE, return qualifier for a vector register. This does not support |
217 | decoding instructions that accept the 2H vector type. */ | |
218 | ||
a06ea964 NC |
219 | static inline enum aarch64_opnd_qualifier |
220 | get_vreg_qualifier_from_value (aarch64_insn value) | |
221 | { | |
222 | enum aarch64_opnd_qualifier qualifier = AARCH64_OPND_QLF_V_8B + value; | |
223 | ||
3067d3b9 MW |
224 | /* Instructions using vector type 2H should not call this function. Skip over |
225 | the 2H qualifier. */ | |
226 | if (qualifier >= AARCH64_OPND_QLF_V_2H) | |
227 | qualifier += 1; | |
228 | ||
a06ea964 NC |
229 | assert (value <= 0x8 |
230 | && aarch64_get_qualifier_standard_value (qualifier) == value); | |
231 | return qualifier; | |
232 | } | |
233 | ||
234 | /* Given VALUE, return qualifier for an FP or AdvSIMD scalar register. */ | |
235 | static inline enum aarch64_opnd_qualifier | |
236 | get_sreg_qualifier_from_value (aarch64_insn value) | |
237 | { | |
238 | enum aarch64_opnd_qualifier qualifier = AARCH64_OPND_QLF_S_B + value; | |
239 | ||
240 | assert (value <= 0x4 | |
241 | && aarch64_get_qualifier_standard_value (qualifier) == value); | |
242 | return qualifier; | |
243 | } | |
244 | ||
245 | /* Given the instruction in *INST which is probably half way through the | |
246 | decoding and our caller wants to know the expected qualifier for operand | |
247 | I. Return such a qualifier if we can establish it; otherwise return | |
248 | AARCH64_OPND_QLF_NIL. */ | |
249 | ||
250 | static aarch64_opnd_qualifier_t | |
251 | get_expected_qualifier (const aarch64_inst *inst, int i) | |
252 | { | |
253 | aarch64_opnd_qualifier_seq_t qualifiers; | |
254 | /* Should not be called if the qualifier is known. */ | |
255 | assert (inst->operands[i].qualifier == AARCH64_OPND_QLF_NIL); | |
256 | if (aarch64_find_best_match (inst, inst->opcode->qualifiers_list, | |
257 | i, qualifiers)) | |
258 | return qualifiers[i]; | |
259 | else | |
260 | return AARCH64_OPND_QLF_NIL; | |
261 | } | |
262 | ||
263 | /* Operand extractors. */ | |
264 | ||
78933a4a | 265 | bool |
c2e5c986 SD |
266 | aarch64_ext_none (const aarch64_operand *self ATTRIBUTE_UNUSED, |
267 | aarch64_opnd_info *info ATTRIBUTE_UNUSED, | |
268 | const aarch64_insn code ATTRIBUTE_UNUSED, | |
269 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
270 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
271 | { | |
78933a4a | 272 | return true; |
c2e5c986 SD |
273 | } |
274 | ||
78933a4a | 275 | bool |
a06ea964 NC |
276 | aarch64_ext_regno (const aarch64_operand *self, aarch64_opnd_info *info, |
277 | const aarch64_insn code, | |
561a72d4 TC |
278 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
279 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
280 | { |
281 | info->reg.regno = extract_field (self->fields[0], code, 0); | |
78933a4a | 282 | return true; |
a06ea964 NC |
283 | } |
284 | ||
78933a4a | 285 | bool |
ee804238 JW |
286 | aarch64_ext_regno_pair (const aarch64_operand *self ATTRIBUTE_UNUSED, aarch64_opnd_info *info, |
287 | const aarch64_insn code ATTRIBUTE_UNUSED, | |
561a72d4 TC |
288 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
289 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
ee804238 JW |
290 | { |
291 | assert (info->idx == 1 | |
292 | || info->idx ==3); | |
293 | info->reg.regno = inst->operands[info->idx - 1].reg.regno + 1; | |
78933a4a | 294 | return true; |
ee804238 JW |
295 | } |
296 | ||
a06ea964 | 297 | /* e.g. IC <ic_op>{, <Xt>}. */ |
78933a4a | 298 | bool |
a06ea964 NC |
299 | aarch64_ext_regrt_sysins (const aarch64_operand *self, aarch64_opnd_info *info, |
300 | const aarch64_insn code, | |
561a72d4 TC |
301 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
302 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
303 | { |
304 | info->reg.regno = extract_field (self->fields[0], code, 0); | |
305 | assert (info->idx == 1 | |
306 | && (aarch64_get_operand_class (inst->operands[0].type) | |
307 | == AARCH64_OPND_CLASS_SYSTEM)); | |
308 | /* This will make the constraint checking happy and more importantly will | |
309 | help the disassembler determine whether this operand is optional or | |
310 | not. */ | |
ea2deeec | 311 | info->present = aarch64_sys_ins_reg_has_xt (inst->operands[0].sysins_op); |
a06ea964 | 312 | |
78933a4a | 313 | return true; |
a06ea964 NC |
314 | } |
315 | ||
316 | /* e.g. SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]. */ | |
78933a4a | 317 | bool |
a06ea964 NC |
318 | aarch64_ext_reglane (const aarch64_operand *self, aarch64_opnd_info *info, |
319 | const aarch64_insn code, | |
561a72d4 TC |
320 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
321 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
322 | { |
323 | /* regno */ | |
324 | info->reglane.regno = extract_field (self->fields[0], code, | |
325 | inst->opcode->mask); | |
326 | ||
327 | /* Index and/or type. */ | |
328 | if (inst->opcode->iclass == asisdone | |
329 | || inst->opcode->iclass == asimdins) | |
330 | { | |
331 | if (info->type == AARCH64_OPND_En | |
332 | && inst->opcode->operands[0] == AARCH64_OPND_Ed) | |
333 | { | |
334 | unsigned shift; | |
335 | /* index2 for e.g. INS <Vd>.<Ts>[<index1>], <Vn>.<Ts>[<index2>]. */ | |
336 | assert (info->idx == 1); /* Vn */ | |
337 | aarch64_insn value = extract_field (FLD_imm4, code, 0); | |
338 | /* Depend on AARCH64_OPND_Ed to determine the qualifier. */ | |
339 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
340 | shift = get_logsz (aarch64_get_qualifier_esize (info->qualifier)); | |
341 | info->reglane.index = value >> shift; | |
342 | } | |
343 | else | |
344 | { | |
345 | /* index and type for e.g. DUP <V><d>, <Vn>.<T>[<index>]. | |
346 | imm5<3:0> <V> | |
347 | 0000 RESERVED | |
348 | xxx1 B | |
349 | xx10 H | |
350 | x100 S | |
351 | 1000 D */ | |
352 | int pos = -1; | |
353 | aarch64_insn value = extract_field (FLD_imm5, code, 0); | |
354 | while (++pos <= 3 && (value & 0x1) == 0) | |
355 | value >>= 1; | |
356 | if (pos > 3) | |
78933a4a | 357 | return false; |
a06ea964 NC |
358 | info->qualifier = get_sreg_qualifier_from_value (pos); |
359 | info->reglane.index = (unsigned) (value >> 1); | |
360 | } | |
361 | } | |
65a55fbb TC |
362 | else if (inst->opcode->iclass == dotproduct) |
363 | { | |
364 | /* Need information in other operand(s) to help decoding. */ | |
365 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
366 | switch (info->qualifier) | |
367 | { | |
00c2093f | 368 | case AARCH64_OPND_QLF_S_4B: |
df678013 | 369 | case AARCH64_OPND_QLF_S_2H: |
65a55fbb TC |
370 | /* L:H */ |
371 | info->reglane.index = extract_fields (code, 0, 2, FLD_H, FLD_L); | |
372 | info->reglane.regno &= 0x1f; | |
373 | break; | |
374 | default: | |
78933a4a | 375 | return false; |
65a55fbb TC |
376 | } |
377 | } | |
f42f1a1d TC |
378 | else if (inst->opcode->iclass == cryptosm3) |
379 | { | |
380 | /* index for e.g. SM3TT2A <Vd>.4S, <Vn>.4S, <Vm>S[<imm2>]. */ | |
381 | info->reglane.index = extract_field (FLD_SM3_imm2, code, 0); | |
382 | } | |
a06ea964 NC |
383 | else |
384 | { | |
385 | /* Index only for e.g. SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>] | |
386 | or SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]. */ | |
387 | ||
388 | /* Need information in other operand(s) to help decoding. */ | |
389 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
390 | switch (info->qualifier) | |
391 | { | |
392 | case AARCH64_OPND_QLF_S_H: | |
369c9167 TC |
393 | if (info->type == AARCH64_OPND_Em16) |
394 | { | |
395 | /* h:l:m */ | |
396 | info->reglane.index = extract_fields (code, 0, 3, FLD_H, FLD_L, | |
397 | FLD_M); | |
398 | info->reglane.regno &= 0xf; | |
399 | } | |
400 | else | |
401 | { | |
402 | /* h:l */ | |
403 | info->reglane.index = extract_fields (code, 0, 2, FLD_H, FLD_L); | |
404 | } | |
a06ea964 NC |
405 | break; |
406 | case AARCH64_OPND_QLF_S_S: | |
407 | /* h:l */ | |
408 | info->reglane.index = extract_fields (code, 0, 2, FLD_H, FLD_L); | |
409 | break; | |
410 | case AARCH64_OPND_QLF_S_D: | |
411 | /* H */ | |
412 | info->reglane.index = extract_field (FLD_H, code, 0); | |
413 | break; | |
414 | default: | |
78933a4a | 415 | return false; |
a06ea964 | 416 | } |
c2c4ff8d | 417 | |
369c9167 TC |
418 | if (inst->opcode->op == OP_FCMLA_ELEM |
419 | && info->qualifier != AARCH64_OPND_QLF_S_H) | |
c2c4ff8d SN |
420 | { |
421 | /* Complex operand takes two elements. */ | |
422 | if (info->reglane.index & 1) | |
78933a4a | 423 | return false; |
c2c4ff8d SN |
424 | info->reglane.index /= 2; |
425 | } | |
a06ea964 NC |
426 | } |
427 | ||
78933a4a | 428 | return true; |
a06ea964 NC |
429 | } |
430 | ||
78933a4a | 431 | bool |
a06ea964 NC |
432 | aarch64_ext_reglist (const aarch64_operand *self, aarch64_opnd_info *info, |
433 | const aarch64_insn code, | |
561a72d4 TC |
434 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
435 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
436 | { |
437 | /* R */ | |
438 | info->reglist.first_regno = extract_field (self->fields[0], code, 0); | |
439 | /* len */ | |
440 | info->reglist.num_regs = extract_field (FLD_len, code, 0) + 1; | |
78933a4a | 441 | return true; |
a06ea964 NC |
442 | } |
443 | ||
444 | /* Decode Rt and opcode fields of Vt in AdvSIMD load/store instructions. */ | |
78933a4a | 445 | bool |
a06ea964 NC |
446 | aarch64_ext_ldst_reglist (const aarch64_operand *self ATTRIBUTE_UNUSED, |
447 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
448 | const aarch64_inst *inst, |
449 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
450 | { |
451 | aarch64_insn value; | |
452 | /* Number of elements in each structure to be loaded/stored. */ | |
453 | unsigned expected_num = get_opcode_dependent_value (inst->opcode); | |
454 | ||
455 | struct | |
456 | { | |
457 | unsigned is_reserved; | |
458 | unsigned num_regs; | |
459 | unsigned num_elements; | |
460 | } data [] = | |
461 | { {0, 4, 4}, | |
462 | {1, 4, 4}, | |
463 | {0, 4, 1}, | |
464 | {0, 4, 2}, | |
465 | {0, 3, 3}, | |
466 | {1, 3, 3}, | |
467 | {0, 3, 1}, | |
468 | {0, 1, 1}, | |
469 | {0, 2, 2}, | |
470 | {1, 2, 2}, | |
471 | {0, 2, 1}, | |
472 | }; | |
473 | ||
474 | /* Rt */ | |
475 | info->reglist.first_regno = extract_field (FLD_Rt, code, 0); | |
476 | /* opcode */ | |
477 | value = extract_field (FLD_opcode, code, 0); | |
cd3ea7c6 NC |
478 | /* PR 21595: Check for a bogus value. */ |
479 | if (value >= ARRAY_SIZE (data)) | |
78933a4a | 480 | return false; |
a06ea964 | 481 | if (expected_num != data[value].num_elements || data[value].is_reserved) |
78933a4a | 482 | return false; |
a06ea964 NC |
483 | info->reglist.num_regs = data[value].num_regs; |
484 | ||
78933a4a | 485 | return true; |
a06ea964 NC |
486 | } |
487 | ||
488 | /* Decode Rt and S fields of Vt in AdvSIMD load single structure to all | |
489 | lanes instructions. */ | |
78933a4a | 490 | bool |
a06ea964 NC |
491 | aarch64_ext_ldst_reglist_r (const aarch64_operand *self ATTRIBUTE_UNUSED, |
492 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
493 | const aarch64_inst *inst, |
494 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
495 | { |
496 | aarch64_insn value; | |
497 | ||
498 | /* Rt */ | |
499 | info->reglist.first_regno = extract_field (FLD_Rt, code, 0); | |
500 | /* S */ | |
501 | value = extract_field (FLD_S, code, 0); | |
502 | ||
503 | /* Number of registers is equal to the number of elements in | |
504 | each structure to be loaded/stored. */ | |
505 | info->reglist.num_regs = get_opcode_dependent_value (inst->opcode); | |
506 | assert (info->reglist.num_regs >= 1 && info->reglist.num_regs <= 4); | |
507 | ||
508 | /* Except when it is LD1R. */ | |
509 | if (info->reglist.num_regs == 1 && value == (aarch64_insn) 1) | |
510 | info->reglist.num_regs = 2; | |
511 | ||
78933a4a | 512 | return true; |
a06ea964 NC |
513 | } |
514 | ||
515 | /* Decode Q, opcode<2:1>, S, size and Rt fields of Vt in AdvSIMD | |
516 | load/store single element instructions. */ | |
78933a4a | 517 | bool |
a06ea964 NC |
518 | aarch64_ext_ldst_elemlist (const aarch64_operand *self ATTRIBUTE_UNUSED, |
519 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
520 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
521 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
522 | { |
523 | aarch64_field field = {0, 0}; | |
524 | aarch64_insn QSsize; /* fields Q:S:size. */ | |
525 | aarch64_insn opcodeh2; /* opcode<2:1> */ | |
526 | ||
527 | /* Rt */ | |
528 | info->reglist.first_regno = extract_field (FLD_Rt, code, 0); | |
529 | ||
530 | /* Decode the index, opcode<2:1> and size. */ | |
531 | gen_sub_field (FLD_asisdlso_opcode, 1, 2, &field); | |
532 | opcodeh2 = extract_field_2 (&field, code, 0); | |
533 | QSsize = extract_fields (code, 0, 3, FLD_Q, FLD_S, FLD_vldst_size); | |
534 | switch (opcodeh2) | |
535 | { | |
536 | case 0x0: | |
537 | info->qualifier = AARCH64_OPND_QLF_S_B; | |
538 | /* Index encoded in "Q:S:size". */ | |
539 | info->reglist.index = QSsize; | |
540 | break; | |
541 | case 0x1: | |
76dfed02 YZ |
542 | if (QSsize & 0x1) |
543 | /* UND. */ | |
78933a4a | 544 | return false; |
a06ea964 NC |
545 | info->qualifier = AARCH64_OPND_QLF_S_H; |
546 | /* Index encoded in "Q:S:size<1>". */ | |
547 | info->reglist.index = QSsize >> 1; | |
548 | break; | |
549 | case 0x2: | |
76dfed02 YZ |
550 | if ((QSsize >> 1) & 0x1) |
551 | /* UND. */ | |
78933a4a | 552 | return false; |
a06ea964 NC |
553 | if ((QSsize & 0x1) == 0) |
554 | { | |
555 | info->qualifier = AARCH64_OPND_QLF_S_S; | |
556 | /* Index encoded in "Q:S". */ | |
557 | info->reglist.index = QSsize >> 2; | |
558 | } | |
559 | else | |
560 | { | |
a06ea964 NC |
561 | if (extract_field (FLD_S, code, 0)) |
562 | /* UND */ | |
78933a4a | 563 | return false; |
76dfed02 YZ |
564 | info->qualifier = AARCH64_OPND_QLF_S_D; |
565 | /* Index encoded in "Q". */ | |
566 | info->reglist.index = QSsize >> 3; | |
a06ea964 NC |
567 | } |
568 | break; | |
569 | default: | |
78933a4a | 570 | return false; |
a06ea964 NC |
571 | } |
572 | ||
573 | info->reglist.has_index = 1; | |
574 | info->reglist.num_regs = 0; | |
575 | /* Number of registers is equal to the number of elements in | |
576 | each structure to be loaded/stored. */ | |
577 | info->reglist.num_regs = get_opcode_dependent_value (inst->opcode); | |
578 | assert (info->reglist.num_regs >= 1 && info->reglist.num_regs <= 4); | |
579 | ||
78933a4a | 580 | return true; |
a06ea964 NC |
581 | } |
582 | ||
583 | /* Decode fields immh:immb and/or Q for e.g. | |
584 | SSHR <Vd>.<T>, <Vn>.<T>, #<shift> | |
585 | or SSHR <V><d>, <V><n>, #<shift>. */ | |
586 | ||
78933a4a | 587 | bool |
a06ea964 NC |
588 | aarch64_ext_advsimd_imm_shift (const aarch64_operand *self ATTRIBUTE_UNUSED, |
589 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
590 | const aarch64_inst *inst, |
591 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
592 | { |
593 | int pos; | |
594 | aarch64_insn Q, imm, immh; | |
595 | enum aarch64_insn_class iclass = inst->opcode->iclass; | |
596 | ||
597 | immh = extract_field (FLD_immh, code, 0); | |
598 | if (immh == 0) | |
78933a4a | 599 | return false; |
a06ea964 NC |
600 | imm = extract_fields (code, 0, 2, FLD_immh, FLD_immb); |
601 | pos = 4; | |
602 | /* Get highest set bit in immh. */ | |
603 | while (--pos >= 0 && (immh & 0x8) == 0) | |
604 | immh <<= 1; | |
605 | ||
606 | assert ((iclass == asimdshf || iclass == asisdshf) | |
607 | && (info->type == AARCH64_OPND_IMM_VLSR | |
608 | || info->type == AARCH64_OPND_IMM_VLSL)); | |
609 | ||
610 | if (iclass == asimdshf) | |
611 | { | |
612 | Q = extract_field (FLD_Q, code, 0); | |
613 | /* immh Q <T> | |
614 | 0000 x SEE AdvSIMD modified immediate | |
615 | 0001 0 8B | |
616 | 0001 1 16B | |
617 | 001x 0 4H | |
618 | 001x 1 8H | |
619 | 01xx 0 2S | |
620 | 01xx 1 4S | |
621 | 1xxx 0 RESERVED | |
622 | 1xxx 1 2D */ | |
623 | info->qualifier = | |
624 | get_vreg_qualifier_from_value ((pos << 1) | (int) Q); | |
625 | } | |
626 | else | |
627 | info->qualifier = get_sreg_qualifier_from_value (pos); | |
628 | ||
629 | if (info->type == AARCH64_OPND_IMM_VLSR) | |
630 | /* immh <shift> | |
631 | 0000 SEE AdvSIMD modified immediate | |
632 | 0001 (16-UInt(immh:immb)) | |
633 | 001x (32-UInt(immh:immb)) | |
634 | 01xx (64-UInt(immh:immb)) | |
635 | 1xxx (128-UInt(immh:immb)) */ | |
636 | info->imm.value = (16 << pos) - imm; | |
637 | else | |
638 | /* immh:immb | |
639 | immh <shift> | |
640 | 0000 SEE AdvSIMD modified immediate | |
641 | 0001 (UInt(immh:immb)-8) | |
642 | 001x (UInt(immh:immb)-16) | |
643 | 01xx (UInt(immh:immb)-32) | |
644 | 1xxx (UInt(immh:immb)-64) */ | |
645 | info->imm.value = imm - (8 << pos); | |
646 | ||
78933a4a | 647 | return true; |
a06ea964 NC |
648 | } |
649 | ||
650 | /* Decode shift immediate for e.g. sshr (imm). */ | |
78933a4a | 651 | bool |
a06ea964 NC |
652 | aarch64_ext_shll_imm (const aarch64_operand *self ATTRIBUTE_UNUSED, |
653 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
654 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
655 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
656 | { |
657 | int64_t imm; | |
658 | aarch64_insn val; | |
659 | val = extract_field (FLD_size, code, 0); | |
660 | switch (val) | |
661 | { | |
662 | case 0: imm = 8; break; | |
663 | case 1: imm = 16; break; | |
664 | case 2: imm = 32; break; | |
78933a4a | 665 | default: return false; |
a06ea964 NC |
666 | } |
667 | info->imm.value = imm; | |
78933a4a | 668 | return true; |
a06ea964 NC |
669 | } |
670 | ||
671 | /* Decode imm for e.g. BFM <Wd>, <Wn>, #<immr>, #<imms>. | |
672 | value in the field(s) will be extracted as unsigned immediate value. */ | |
78933a4a | 673 | bool |
a06ea964 NC |
674 | aarch64_ext_imm (const aarch64_operand *self, aarch64_opnd_info *info, |
675 | const aarch64_insn code, | |
3dd032c5 | 676 | const aarch64_inst *inst, |
561a72d4 | 677 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
a06ea964 | 678 | { |
f81e7e2d | 679 | uint64_t imm; |
a06ea964 | 680 | |
b5464a68 | 681 | imm = extract_all_fields (self, code); |
a06ea964 | 682 | |
a06ea964 NC |
683 | if (operand_need_sign_extension (self)) |
684 | imm = sign_extend (imm, get_operand_fields_width (self) - 1); | |
685 | ||
686 | if (operand_need_shift_by_two (self)) | |
687 | imm <<= 2; | |
193614f2 SD |
688 | else if (operand_need_shift_by_four (self)) |
689 | imm <<= 4; | |
a06ea964 NC |
690 | |
691 | if (info->type == AARCH64_OPND_ADDR_ADRP) | |
692 | imm <<= 12; | |
693 | ||
3dd032c5 PW |
694 | if (inst->operands[0].type == AARCH64_OPND_PSTATEFIELD |
695 | && inst->operands[0].sysreg.flags & F_IMM_IN_CRM) | |
696 | imm &= PSTATE_DECODE_CRM_IMM (inst->operands[0].sysreg.flags); | |
697 | ||
a06ea964 | 698 | info->imm.value = imm; |
78933a4a | 699 | return true; |
a06ea964 NC |
700 | } |
701 | ||
702 | /* Decode imm and its shifter for e.g. MOVZ <Wd>, #<imm16>{, LSL #<shift>}. */ | |
78933a4a | 703 | bool |
a06ea964 NC |
704 | aarch64_ext_imm_half (const aarch64_operand *self, aarch64_opnd_info *info, |
705 | const aarch64_insn code, | |
561a72d4 TC |
706 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
707 | aarch64_operand_error *errors) | |
a06ea964 | 708 | { |
561a72d4 | 709 | aarch64_ext_imm (self, info, code, inst, errors); |
a06ea964 NC |
710 | info->shifter.kind = AARCH64_MOD_LSL; |
711 | info->shifter.amount = extract_field (FLD_hw, code, 0) << 4; | |
78933a4a | 712 | return true; |
a06ea964 NC |
713 | } |
714 | ||
715 | /* Decode cmode and "a:b:c:d:e:f:g:h" for e.g. | |
716 | MOVI <Vd>.<T>, #<imm8> {, LSL #<amount>}. */ | |
78933a4a | 717 | bool |
a06ea964 NC |
718 | aarch64_ext_advsimd_imm_modified (const aarch64_operand *self ATTRIBUTE_UNUSED, |
719 | aarch64_opnd_info *info, | |
720 | const aarch64_insn code, | |
561a72d4 TC |
721 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
722 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
723 | { |
724 | uint64_t imm; | |
725 | enum aarch64_opnd_qualifier opnd0_qualifier = inst->operands[0].qualifier; | |
726 | aarch64_field field = {0, 0}; | |
727 | ||
728 | assert (info->idx == 1); | |
729 | ||
730 | if (info->type == AARCH64_OPND_SIMD_FPIMM) | |
731 | info->imm.is_fp = 1; | |
732 | ||
733 | /* a:b:c:d:e:f:g:h */ | |
734 | imm = extract_fields (code, 0, 2, FLD_abc, FLD_defgh); | |
735 | if (!info->imm.is_fp && aarch64_get_qualifier_esize (opnd0_qualifier) == 8) | |
736 | { | |
737 | /* Either MOVI <Dd>, #<imm> | |
738 | or MOVI <Vd>.2D, #<imm>. | |
739 | <imm> is a 64-bit immediate | |
740 | 'aaaaaaaabbbbbbbbccccccccddddddddeeeeeeeeffffffffgggggggghhhhhhhh', | |
741 | encoded in "a:b:c:d:e:f:g:h". */ | |
742 | int i; | |
743 | unsigned abcdefgh = imm; | |
744 | for (imm = 0ull, i = 0; i < 8; i++) | |
745 | if (((abcdefgh >> i) & 0x1) != 0) | |
746 | imm |= 0xffull << (8 * i); | |
747 | } | |
748 | info->imm.value = imm; | |
749 | ||
750 | /* cmode */ | |
751 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
752 | switch (info->qualifier) | |
753 | { | |
754 | case AARCH64_OPND_QLF_NIL: | |
755 | /* no shift */ | |
756 | info->shifter.kind = AARCH64_MOD_NONE; | |
757 | return 1; | |
758 | case AARCH64_OPND_QLF_LSL: | |
759 | /* shift zeros */ | |
760 | info->shifter.kind = AARCH64_MOD_LSL; | |
761 | switch (aarch64_get_qualifier_esize (opnd0_qualifier)) | |
762 | { | |
763 | case 4: gen_sub_field (FLD_cmode, 1, 2, &field); break; /* per word */ | |
764 | case 2: gen_sub_field (FLD_cmode, 1, 1, &field); break; /* per half */ | |
f5555712 | 765 | case 1: gen_sub_field (FLD_cmode, 1, 0, &field); break; /* per byte */ |
7060c28e | 766 | default: return false; |
a06ea964 NC |
767 | } |
768 | /* 00: 0; 01: 8; 10:16; 11:24. */ | |
769 | info->shifter.amount = extract_field_2 (&field, code, 0) << 3; | |
770 | break; | |
771 | case AARCH64_OPND_QLF_MSL: | |
772 | /* shift ones */ | |
773 | info->shifter.kind = AARCH64_MOD_MSL; | |
774 | gen_sub_field (FLD_cmode, 0, 1, &field); /* per word */ | |
775 | info->shifter.amount = extract_field_2 (&field, code, 0) ? 16 : 8; | |
776 | break; | |
777 | default: | |
78933a4a | 778 | return false; |
a06ea964 NC |
779 | } |
780 | ||
78933a4a | 781 | return true; |
a06ea964 NC |
782 | } |
783 | ||
aa2aa4c6 | 784 | /* Decode an 8-bit floating-point immediate. */ |
78933a4a | 785 | bool |
aa2aa4c6 RS |
786 | aarch64_ext_fpimm (const aarch64_operand *self, aarch64_opnd_info *info, |
787 | const aarch64_insn code, | |
561a72d4 TC |
788 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
789 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
aa2aa4c6 RS |
790 | { |
791 | info->imm.value = extract_all_fields (self, code); | |
792 | info->imm.is_fp = 1; | |
78933a4a | 793 | return true; |
aa2aa4c6 RS |
794 | } |
795 | ||
582e12bf | 796 | /* Decode a 1-bit rotate immediate (#90 or #270). */ |
78933a4a | 797 | bool |
582e12bf RS |
798 | aarch64_ext_imm_rotate1 (const aarch64_operand *self, aarch64_opnd_info *info, |
799 | const aarch64_insn code, | |
561a72d4 TC |
800 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
801 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
c2c4ff8d SN |
802 | { |
803 | uint64_t rot = extract_field (self->fields[0], code, 0); | |
582e12bf RS |
804 | assert (rot < 2U); |
805 | info->imm.value = rot * 180 + 90; | |
78933a4a | 806 | return true; |
582e12bf | 807 | } |
c2c4ff8d | 808 | |
582e12bf | 809 | /* Decode a 2-bit rotate immediate (#0, #90, #180 or #270). */ |
78933a4a | 810 | bool |
582e12bf RS |
811 | aarch64_ext_imm_rotate2 (const aarch64_operand *self, aarch64_opnd_info *info, |
812 | const aarch64_insn code, | |
561a72d4 TC |
813 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
814 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
582e12bf RS |
815 | { |
816 | uint64_t rot = extract_field (self->fields[0], code, 0); | |
817 | assert (rot < 4U); | |
c2c4ff8d | 818 | info->imm.value = rot * 90; |
78933a4a | 819 | return true; |
c2c4ff8d SN |
820 | } |
821 | ||
a06ea964 | 822 | /* Decode scale for e.g. SCVTF <Dd>, <Wn>, #<fbits>. */ |
78933a4a | 823 | bool |
a06ea964 NC |
824 | aarch64_ext_fbits (const aarch64_operand *self ATTRIBUTE_UNUSED, |
825 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
826 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
827 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
828 | { |
829 | info->imm.value = 64- extract_field (FLD_scale, code, 0); | |
78933a4a | 830 | return true; |
a06ea964 NC |
831 | } |
832 | ||
833 | /* Decode arithmetic immediate for e.g. | |
834 | SUBS <Wd>, <Wn|WSP>, #<imm> {, <shift>}. */ | |
78933a4a | 835 | bool |
a06ea964 NC |
836 | aarch64_ext_aimm (const aarch64_operand *self ATTRIBUTE_UNUSED, |
837 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
838 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
839 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
840 | { |
841 | aarch64_insn value; | |
842 | ||
843 | info->shifter.kind = AARCH64_MOD_LSL; | |
844 | /* shift */ | |
845 | value = extract_field (FLD_shift, code, 0); | |
846 | if (value >= 2) | |
78933a4a | 847 | return false; |
a06ea964 NC |
848 | info->shifter.amount = value ? 12 : 0; |
849 | /* imm12 (unsigned) */ | |
850 | info->imm.value = extract_field (FLD_imm12, code, 0); | |
851 | ||
78933a4a | 852 | return true; |
a06ea964 NC |
853 | } |
854 | ||
e950b345 RS |
855 | /* Return true if VALUE is a valid logical immediate encoding, storing the |
856 | decoded value in *RESULT if so. ESIZE is the number of bytes in the | |
857 | decoded immediate. */ | |
78933a4a | 858 | static bool |
e950b345 | 859 | decode_limm (uint32_t esize, aarch64_insn value, int64_t *result) |
a06ea964 NC |
860 | { |
861 | uint64_t imm, mask; | |
a06ea964 NC |
862 | uint32_t N, R, S; |
863 | unsigned simd_size; | |
a06ea964 NC |
864 | |
865 | /* value is N:immr:imms. */ | |
866 | S = value & 0x3f; | |
867 | R = (value >> 6) & 0x3f; | |
868 | N = (value >> 12) & 0x1; | |
869 | ||
a06ea964 NC |
870 | /* The immediate value is S+1 bits to 1, left rotated by SIMDsize - R |
871 | (in other words, right rotated by R), then replicated. */ | |
872 | if (N != 0) | |
873 | { | |
874 | simd_size = 64; | |
875 | mask = 0xffffffffffffffffull; | |
876 | } | |
877 | else | |
878 | { | |
879 | switch (S) | |
880 | { | |
881 | case 0x00 ... 0x1f: /* 0xxxxx */ simd_size = 32; break; | |
882 | case 0x20 ... 0x2f: /* 10xxxx */ simd_size = 16; S &= 0xf; break; | |
883 | case 0x30 ... 0x37: /* 110xxx */ simd_size = 8; S &= 0x7; break; | |
884 | case 0x38 ... 0x3b: /* 1110xx */ simd_size = 4; S &= 0x3; break; | |
885 | case 0x3c ... 0x3d: /* 11110x */ simd_size = 2; S &= 0x1; break; | |
78933a4a | 886 | default: return false; |
a06ea964 NC |
887 | } |
888 | mask = (1ull << simd_size) - 1; | |
889 | /* Top bits are IGNORED. */ | |
890 | R &= simd_size - 1; | |
891 | } | |
e950b345 RS |
892 | |
893 | if (simd_size > esize * 8) | |
78933a4a | 894 | return false; |
e950b345 | 895 | |
a06ea964 NC |
896 | /* NOTE: if S = simd_size - 1 we get 0xf..f which is rejected. */ |
897 | if (S == simd_size - 1) | |
78933a4a | 898 | return false; |
a06ea964 NC |
899 | /* S+1 consecutive bits to 1. */ |
900 | /* NOTE: S can't be 63 due to detection above. */ | |
901 | imm = (1ull << (S + 1)) - 1; | |
902 | /* Rotate to the left by simd_size - R. */ | |
903 | if (R != 0) | |
904 | imm = ((imm << (simd_size - R)) & mask) | (imm >> R); | |
905 | /* Replicate the value according to SIMD size. */ | |
906 | switch (simd_size) | |
907 | { | |
908 | case 2: imm = (imm << 2) | imm; | |
1a0670f3 | 909 | /* Fall through. */ |
a06ea964 | 910 | case 4: imm = (imm << 4) | imm; |
1a0670f3 | 911 | /* Fall through. */ |
a06ea964 | 912 | case 8: imm = (imm << 8) | imm; |
1a0670f3 | 913 | /* Fall through. */ |
a06ea964 | 914 | case 16: imm = (imm << 16) | imm; |
1a0670f3 | 915 | /* Fall through. */ |
a06ea964 | 916 | case 32: imm = (imm << 32) | imm; |
1a0670f3 | 917 | /* Fall through. */ |
a06ea964 | 918 | case 64: break; |
7060c28e | 919 | default: return 0; |
a06ea964 NC |
920 | } |
921 | ||
e950b345 RS |
922 | *result = imm & ~((uint64_t) -1 << (esize * 4) << (esize * 4)); |
923 | ||
78933a4a | 924 | return true; |
e950b345 RS |
925 | } |
926 | ||
927 | /* Decode a logical immediate for e.g. ORR <Wd|WSP>, <Wn>, #<imm>. */ | |
78933a4a | 928 | bool |
e950b345 RS |
929 | aarch64_ext_limm (const aarch64_operand *self, |
930 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
931 | const aarch64_inst *inst, |
932 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
e950b345 RS |
933 | { |
934 | uint32_t esize; | |
935 | aarch64_insn value; | |
936 | ||
937 | value = extract_fields (code, 0, 3, self->fields[0], self->fields[1], | |
938 | self->fields[2]); | |
939 | esize = aarch64_get_qualifier_esize (inst->operands[0].qualifier); | |
940 | return decode_limm (esize, value, &info->imm.value); | |
941 | } | |
a06ea964 | 942 | |
e950b345 | 943 | /* Decode a logical immediate for the BIC alias of AND (etc.). */ |
78933a4a | 944 | bool |
e950b345 RS |
945 | aarch64_ext_inv_limm (const aarch64_operand *self, |
946 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
947 | const aarch64_inst *inst, |
948 | aarch64_operand_error *errors) | |
e950b345 | 949 | { |
561a72d4 | 950 | if (!aarch64_ext_limm (self, info, code, inst, errors)) |
78933a4a | 951 | return false; |
e950b345 | 952 | info->imm.value = ~info->imm.value; |
78933a4a | 953 | return true; |
a06ea964 NC |
954 | } |
955 | ||
956 | /* Decode Ft for e.g. STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}] | |
957 | or LDP <Qt1>, <Qt2>, [<Xn|SP>], #<imm>. */ | |
78933a4a | 958 | bool |
a06ea964 NC |
959 | aarch64_ext_ft (const aarch64_operand *self ATTRIBUTE_UNUSED, |
960 | aarch64_opnd_info *info, | |
561a72d4 TC |
961 | const aarch64_insn code, const aarch64_inst *inst, |
962 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
963 | { |
964 | aarch64_insn value; | |
965 | ||
966 | /* Rt */ | |
967 | info->reg.regno = extract_field (FLD_Rt, code, 0); | |
968 | ||
969 | /* size */ | |
970 | value = extract_field (FLD_ldst_size, code, 0); | |
971 | if (inst->opcode->iclass == ldstpair_indexed | |
972 | || inst->opcode->iclass == ldstnapair_offs | |
973 | || inst->opcode->iclass == ldstpair_off | |
974 | || inst->opcode->iclass == loadlit) | |
975 | { | |
976 | enum aarch64_opnd_qualifier qualifier; | |
977 | switch (value) | |
978 | { | |
979 | case 0: qualifier = AARCH64_OPND_QLF_S_S; break; | |
980 | case 1: qualifier = AARCH64_OPND_QLF_S_D; break; | |
981 | case 2: qualifier = AARCH64_OPND_QLF_S_Q; break; | |
78933a4a | 982 | default: return false; |
a06ea964 NC |
983 | } |
984 | info->qualifier = qualifier; | |
985 | } | |
986 | else | |
987 | { | |
988 | /* opc1:size */ | |
989 | value = extract_fields (code, 0, 2, FLD_opc1, FLD_ldst_size); | |
990 | if (value > 0x4) | |
78933a4a | 991 | return false; |
a06ea964 NC |
992 | info->qualifier = get_sreg_qualifier_from_value (value); |
993 | } | |
994 | ||
78933a4a | 995 | return true; |
a06ea964 NC |
996 | } |
997 | ||
998 | /* Decode the address operand for e.g. STXRB <Ws>, <Wt>, [<Xn|SP>{,#0}]. */ | |
78933a4a | 999 | bool |
a06ea964 NC |
1000 | aarch64_ext_addr_simple (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1001 | aarch64_opnd_info *info, | |
1002 | aarch64_insn code, | |
561a72d4 TC |
1003 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1004 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1005 | { |
1006 | /* Rn */ | |
1007 | info->addr.base_regno = extract_field (FLD_Rn, code, 0); | |
78933a4a | 1008 | return true; |
a06ea964 NC |
1009 | } |
1010 | ||
f42f1a1d TC |
1011 | /* Decode the address operand for e.g. |
1012 | stlur <Xt>, [<Xn|SP>{, <amount>}]. */ | |
78933a4a | 1013 | bool |
f42f1a1d TC |
1014 | aarch64_ext_addr_offset (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1015 | aarch64_opnd_info *info, | |
561a72d4 TC |
1016 | aarch64_insn code, const aarch64_inst *inst, |
1017 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
f42f1a1d TC |
1018 | { |
1019 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
1020 | ||
1021 | /* Rn */ | |
1022 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
1023 | ||
1024 | /* simm9 */ | |
1025 | aarch64_insn imm = extract_fields (code, 0, 1, self->fields[1]); | |
1026 | info->addr.offset.imm = sign_extend (imm, 8); | |
1027 | if (extract_field (self->fields[2], code, 0) == 1) { | |
1028 | info->addr.writeback = 1; | |
1029 | info->addr.preind = 1; | |
1030 | } | |
78933a4a | 1031 | return true; |
f42f1a1d TC |
1032 | } |
1033 | ||
a06ea964 NC |
1034 | /* Decode the address operand for e.g. |
1035 | STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */ | |
78933a4a | 1036 | bool |
a06ea964 NC |
1037 | aarch64_ext_addr_regoff (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1038 | aarch64_opnd_info *info, | |
561a72d4 TC |
1039 | aarch64_insn code, const aarch64_inst *inst, |
1040 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1041 | { |
1042 | aarch64_insn S, value; | |
1043 | ||
1044 | /* Rn */ | |
1045 | info->addr.base_regno = extract_field (FLD_Rn, code, 0); | |
1046 | /* Rm */ | |
1047 | info->addr.offset.regno = extract_field (FLD_Rm, code, 0); | |
1048 | /* option */ | |
1049 | value = extract_field (FLD_option, code, 0); | |
1050 | info->shifter.kind = | |
78933a4a | 1051 | aarch64_get_operand_modifier_from_value (value, true /* extend_p */); |
a06ea964 NC |
1052 | /* Fix-up the shifter kind; although the table-driven approach is |
1053 | efficient, it is slightly inflexible, thus needing this fix-up. */ | |
1054 | if (info->shifter.kind == AARCH64_MOD_UXTX) | |
1055 | info->shifter.kind = AARCH64_MOD_LSL; | |
1056 | /* S */ | |
1057 | S = extract_field (FLD_S, code, 0); | |
1058 | if (S == 0) | |
1059 | { | |
1060 | info->shifter.amount = 0; | |
1061 | info->shifter.amount_present = 0; | |
1062 | } | |
1063 | else | |
1064 | { | |
1065 | int size; | |
1066 | /* Need information in other operand(s) to help achieve the decoding | |
1067 | from 'S' field. */ | |
1068 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
1069 | /* Get the size of the data element that is accessed, which may be | |
1070 | different from that of the source register size, e.g. in strb/ldrb. */ | |
1071 | size = aarch64_get_qualifier_esize (info->qualifier); | |
1072 | info->shifter.amount = get_logsz (size); | |
1073 | info->shifter.amount_present = 1; | |
1074 | } | |
1075 | ||
78933a4a | 1076 | return true; |
a06ea964 NC |
1077 | } |
1078 | ||
1079 | /* Decode the address operand for e.g. LDRSW <Xt>, [<Xn|SP>], #<simm>. */ | |
78933a4a | 1080 | bool |
a06ea964 | 1081 | aarch64_ext_addr_simm (const aarch64_operand *self, aarch64_opnd_info *info, |
561a72d4 TC |
1082 | aarch64_insn code, const aarch64_inst *inst, |
1083 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1084 | { |
1085 | aarch64_insn imm; | |
1086 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
1087 | ||
1088 | /* Rn */ | |
1089 | info->addr.base_regno = extract_field (FLD_Rn, code, 0); | |
1090 | /* simm (imm9 or imm7) */ | |
1091 | imm = extract_field (self->fields[0], code, 0); | |
1092 | info->addr.offset.imm = sign_extend (imm, fields[self->fields[0]].width - 1); | |
fb3265b3 SD |
1093 | if (self->fields[0] == FLD_imm7 |
1094 | || info->qualifier == AARCH64_OPND_QLF_imm_tag) | |
a06ea964 NC |
1095 | /* scaled immediate in ld/st pair instructions. */ |
1096 | info->addr.offset.imm *= aarch64_get_qualifier_esize (info->qualifier); | |
1097 | /* qualifier */ | |
1098 | if (inst->opcode->iclass == ldst_unscaled | |
1099 | || inst->opcode->iclass == ldstnapair_offs | |
1100 | || inst->opcode->iclass == ldstpair_off | |
1101 | || inst->opcode->iclass == ldst_unpriv) | |
1102 | info->addr.writeback = 0; | |
1103 | else | |
1104 | { | |
1105 | /* pre/post- index */ | |
1106 | info->addr.writeback = 1; | |
1107 | if (extract_field (self->fields[1], code, 0) == 1) | |
1108 | info->addr.preind = 1; | |
1109 | else | |
1110 | info->addr.postind = 1; | |
1111 | } | |
1112 | ||
78933a4a | 1113 | return true; |
a06ea964 NC |
1114 | } |
1115 | ||
1116 | /* Decode the address operand for e.g. LDRSW <Xt>, [<Xn|SP>{, #<simm>}]. */ | |
78933a4a | 1117 | bool |
a06ea964 NC |
1118 | aarch64_ext_addr_uimm12 (const aarch64_operand *self, aarch64_opnd_info *info, |
1119 | aarch64_insn code, | |
561a72d4 TC |
1120 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1121 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1122 | { |
1123 | int shift; | |
1124 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
1125 | shift = get_logsz (aarch64_get_qualifier_esize (info->qualifier)); | |
1126 | /* Rn */ | |
1127 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
1128 | /* uimm12 */ | |
1129 | info->addr.offset.imm = extract_field (self->fields[1], code, 0) << shift; | |
78933a4a | 1130 | return true; |
a06ea964 NC |
1131 | } |
1132 | ||
3f06e550 | 1133 | /* Decode the address operand for e.g. LDRAA <Xt>, [<Xn|SP>{, #<simm>}]. */ |
78933a4a | 1134 | bool |
3f06e550 SN |
1135 | aarch64_ext_addr_simm10 (const aarch64_operand *self, aarch64_opnd_info *info, |
1136 | aarch64_insn code, | |
561a72d4 TC |
1137 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1138 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
3f06e550 SN |
1139 | { |
1140 | aarch64_insn imm; | |
1141 | ||
1142 | info->qualifier = get_expected_qualifier (inst, info->idx); | |
1143 | /* Rn */ | |
1144 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
1145 | /* simm10 */ | |
1146 | imm = extract_fields (code, 0, 2, self->fields[1], self->fields[2]); | |
1147 | info->addr.offset.imm = sign_extend (imm, 9) << 3; | |
1148 | if (extract_field (self->fields[3], code, 0) == 1) { | |
1149 | info->addr.writeback = 1; | |
1150 | info->addr.preind = 1; | |
1151 | } | |
78933a4a | 1152 | return true; |
3f06e550 SN |
1153 | } |
1154 | ||
a06ea964 NC |
1155 | /* Decode the address operand for e.g. |
1156 | LD1 {<Vt>.<T>, <Vt2>.<T>, <Vt3>.<T>}, [<Xn|SP>], <Xm|#<amount>>. */ | |
78933a4a | 1157 | bool |
a06ea964 NC |
1158 | aarch64_ext_simd_addr_post (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1159 | aarch64_opnd_info *info, | |
561a72d4 TC |
1160 | aarch64_insn code, const aarch64_inst *inst, |
1161 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1162 | { |
1163 | /* The opcode dependent area stores the number of elements in | |
1164 | each structure to be loaded/stored. */ | |
1165 | int is_ld1r = get_opcode_dependent_value (inst->opcode) == 1; | |
1166 | ||
1167 | /* Rn */ | |
1168 | info->addr.base_regno = extract_field (FLD_Rn, code, 0); | |
1169 | /* Rm | #<amount> */ | |
1170 | info->addr.offset.regno = extract_field (FLD_Rm, code, 0); | |
1171 | if (info->addr.offset.regno == 31) | |
1172 | { | |
1173 | if (inst->opcode->operands[0] == AARCH64_OPND_LVt_AL) | |
1174 | /* Special handling of loading single structure to all lane. */ | |
1175 | info->addr.offset.imm = (is_ld1r ? 1 | |
1176 | : inst->operands[0].reglist.num_regs) | |
1177 | * aarch64_get_qualifier_esize (inst->operands[0].qualifier); | |
1178 | else | |
1179 | info->addr.offset.imm = inst->operands[0].reglist.num_regs | |
1180 | * aarch64_get_qualifier_esize (inst->operands[0].qualifier) | |
1181 | * aarch64_get_qualifier_nelem (inst->operands[0].qualifier); | |
1182 | } | |
1183 | else | |
1184 | info->addr.offset.is_reg = 1; | |
1185 | info->addr.writeback = 1; | |
1186 | ||
78933a4a | 1187 | return true; |
a06ea964 NC |
1188 | } |
1189 | ||
1190 | /* Decode the condition operand for e.g. CSEL <Xd>, <Xn>, <Xm>, <cond>. */ | |
78933a4a | 1191 | bool |
a06ea964 NC |
1192 | aarch64_ext_cond (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1193 | aarch64_opnd_info *info, | |
561a72d4 TC |
1194 | aarch64_insn code, const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1195 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1196 | { |
1197 | aarch64_insn value; | |
1198 | /* cond */ | |
1199 | value = extract_field (FLD_cond, code, 0); | |
1200 | info->cond = get_cond_from_value (value); | |
78933a4a | 1201 | return true; |
a06ea964 NC |
1202 | } |
1203 | ||
1204 | /* Decode the system register operand for e.g. MRS <Xt>, <systemreg>. */ | |
78933a4a | 1205 | bool |
a06ea964 NC |
1206 | aarch64_ext_sysreg (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1207 | aarch64_opnd_info *info, | |
1208 | aarch64_insn code, | |
561a72d4 TC |
1209 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1210 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1211 | { |
1212 | /* op0:op1:CRn:CRm:op2 */ | |
561a72d4 TC |
1213 | info->sysreg.value = extract_fields (code, 0, 5, FLD_op0, FLD_op1, FLD_CRn, |
1214 | FLD_CRm, FLD_op2); | |
f9830ec1 TC |
1215 | info->sysreg.flags = 0; |
1216 | ||
1217 | /* If a system instruction, check which restrictions should be on the register | |
1218 | value during decoding, these will be enforced then. */ | |
1219 | if (inst->opcode->iclass == ic_system) | |
1220 | { | |
1221 | /* Check to see if it's read-only, else check if it's write only. | |
1222 | if it's both or unspecified don't care. */ | |
1223 | if ((inst->opcode->flags & (F_SYS_READ | F_SYS_WRITE)) == F_SYS_READ) | |
1224 | info->sysreg.flags = F_REG_READ; | |
1225 | else if ((inst->opcode->flags & (F_SYS_READ | F_SYS_WRITE)) | |
1226 | == F_SYS_WRITE) | |
1227 | info->sysreg.flags = F_REG_WRITE; | |
1228 | } | |
1229 | ||
78933a4a | 1230 | return true; |
a06ea964 NC |
1231 | } |
1232 | ||
1233 | /* Decode the PSTATE field operand for e.g. MSR <pstatefield>, #<imm>. */ | |
78933a4a | 1234 | bool |
a06ea964 NC |
1235 | aarch64_ext_pstatefield (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1236 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1237 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1238 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1239 | { |
1240 | int i; | |
3dd032c5 | 1241 | aarch64_insn fld_crm = extract_field (FLD_CRm, code, 0); |
a06ea964 NC |
1242 | /* op1:op2 */ |
1243 | info->pstatefield = extract_fields (code, 0, 2, FLD_op1, FLD_op2); | |
1244 | for (i = 0; aarch64_pstatefields[i].name != NULL; ++i) | |
1245 | if (aarch64_pstatefields[i].value == (aarch64_insn)info->pstatefield) | |
3dd032c5 PW |
1246 | { |
1247 | /* PSTATEFIELD name can be encoded partially in CRm[3:1]. */ | |
1248 | uint32_t flags = aarch64_pstatefields[i].flags; | |
1249 | if ((flags & F_REG_IN_CRM) | |
1250 | && ((fld_crm & 0xe) != PSTATE_DECODE_CRM (flags))) | |
1251 | continue; | |
1252 | info->sysreg.flags = flags; | |
1253 | return true; | |
1254 | } | |
a06ea964 | 1255 | /* Reserved value in <pstatefield>. */ |
78933a4a | 1256 | return false; |
a06ea964 NC |
1257 | } |
1258 | ||
1259 | /* Decode the system instruction op operand for e.g. AT <at_op>, <Xt>. */ | |
78933a4a | 1260 | bool |
a06ea964 NC |
1261 | aarch64_ext_sysins_op (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1262 | aarch64_opnd_info *info, | |
1263 | aarch64_insn code, | |
561a72d4 TC |
1264 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1265 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1266 | { |
1267 | int i; | |
1268 | aarch64_insn value; | |
1269 | const aarch64_sys_ins_reg *sysins_ops; | |
1270 | /* op0:op1:CRn:CRm:op2 */ | |
1271 | value = extract_fields (code, 0, 5, | |
1272 | FLD_op0, FLD_op1, FLD_CRn, | |
1273 | FLD_CRm, FLD_op2); | |
1274 | ||
1275 | switch (info->type) | |
1276 | { | |
1277 | case AARCH64_OPND_SYSREG_AT: sysins_ops = aarch64_sys_regs_at; break; | |
1278 | case AARCH64_OPND_SYSREG_DC: sysins_ops = aarch64_sys_regs_dc; break; | |
1279 | case AARCH64_OPND_SYSREG_IC: sysins_ops = aarch64_sys_regs_ic; break; | |
1280 | case AARCH64_OPND_SYSREG_TLBI: sysins_ops = aarch64_sys_regs_tlbi; break; | |
2ac435d4 SD |
1281 | case AARCH64_OPND_SYSREG_SR: |
1282 | sysins_ops = aarch64_sys_regs_sr; | |
1283 | /* Let's remove op2 for rctx. Refer to comments in the definition of | |
1284 | aarch64_sys_regs_sr[]. */ | |
1285 | value = value & ~(0x7); | |
1286 | break; | |
7060c28e | 1287 | default: return false; |
a06ea964 NC |
1288 | } |
1289 | ||
875880c6 | 1290 | for (i = 0; sysins_ops[i].name != NULL; ++i) |
a06ea964 NC |
1291 | if (sysins_ops[i].value == value) |
1292 | { | |
1293 | info->sysins_op = sysins_ops + i; | |
1294 | DEBUG_TRACE ("%s found value: %x, has_xt: %d, i: %d.", | |
875880c6 | 1295 | info->sysins_op->name, |
a06ea964 | 1296 | (unsigned)info->sysins_op->value, |
ea2deeec | 1297 | aarch64_sys_ins_reg_has_xt (info->sysins_op), i); |
78933a4a | 1298 | return true; |
a06ea964 NC |
1299 | } |
1300 | ||
78933a4a | 1301 | return false; |
a06ea964 NC |
1302 | } |
1303 | ||
1304 | /* Decode the memory barrier option operand for e.g. DMB <option>|#<imm>. */ | |
1305 | ||
78933a4a | 1306 | bool |
a06ea964 NC |
1307 | aarch64_ext_barrier (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1308 | aarch64_opnd_info *info, | |
1309 | aarch64_insn code, | |
561a72d4 TC |
1310 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1311 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1312 | { |
1313 | /* CRm */ | |
1314 | info->barrier = aarch64_barrier_options + extract_field (FLD_CRm, code, 0); | |
78933a4a | 1315 | return true; |
a06ea964 NC |
1316 | } |
1317 | ||
fd195909 PW |
1318 | /* Decode the memory barrier option operand for DSB <option>nXS|#<imm>. */ |
1319 | ||
78933a4a | 1320 | bool |
fd195909 PW |
1321 | aarch64_ext_barrier_dsb_nxs (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1322 | aarch64_opnd_info *info, | |
1323 | aarch64_insn code, | |
1324 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
1325 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
1326 | { | |
1327 | /* For the DSB nXS barrier variant immediate is encoded in 2-bit field. */ | |
1328 | aarch64_insn field = extract_field (FLD_CRm_dsb_nxs, code, 0); | |
1329 | info->barrier = aarch64_barrier_dsb_nxs_options + field; | |
78933a4a | 1330 | return true; |
fd195909 PW |
1331 | } |
1332 | ||
a06ea964 NC |
1333 | /* Decode the prefetch operation option operand for e.g. |
1334 | PRFM <prfop>, [<Xn|SP>{, #<pimm>}]. */ | |
1335 | ||
78933a4a | 1336 | bool |
a06ea964 NC |
1337 | aarch64_ext_prfop (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1338 | aarch64_opnd_info *info, | |
561a72d4 TC |
1339 | aarch64_insn code, const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1340 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1341 | { |
1342 | /* prfop in Rt */ | |
1343 | info->prfop = aarch64_prfops + extract_field (FLD_Rt, code, 0); | |
78933a4a | 1344 | return true; |
a06ea964 NC |
1345 | } |
1346 | ||
9ed608f9 MW |
1347 | /* Decode the hint number for an alias taking an operand. Set info->hint_option |
1348 | to the matching name/value pair in aarch64_hint_options. */ | |
1349 | ||
78933a4a | 1350 | bool |
9ed608f9 MW |
1351 | aarch64_ext_hint (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1352 | aarch64_opnd_info *info, | |
1353 | aarch64_insn code, | |
561a72d4 TC |
1354 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1355 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
9ed608f9 MW |
1356 | { |
1357 | /* CRm:op2. */ | |
1358 | unsigned hint_number; | |
1359 | int i; | |
1360 | ||
1361 | hint_number = extract_fields (code, 0, 2, FLD_CRm, FLD_op2); | |
1362 | ||
1363 | for (i = 0; aarch64_hint_options[i].name != NULL; i++) | |
1364 | { | |
ff605452 | 1365 | if (hint_number == HINT_VAL (aarch64_hint_options[i].value)) |
9ed608f9 MW |
1366 | { |
1367 | info->hint_option = &(aarch64_hint_options[i]); | |
78933a4a | 1368 | return true; |
9ed608f9 MW |
1369 | } |
1370 | } | |
1371 | ||
78933a4a | 1372 | return false; |
9ed608f9 MW |
1373 | } |
1374 | ||
a06ea964 NC |
1375 | /* Decode the extended register operand for e.g. |
1376 | STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */ | |
78933a4a | 1377 | bool |
a06ea964 NC |
1378 | aarch64_ext_reg_extended (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1379 | aarch64_opnd_info *info, | |
1380 | aarch64_insn code, | |
561a72d4 TC |
1381 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1382 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1383 | { |
1384 | aarch64_insn value; | |
1385 | ||
1386 | /* Rm */ | |
1387 | info->reg.regno = extract_field (FLD_Rm, code, 0); | |
1388 | /* option */ | |
1389 | value = extract_field (FLD_option, code, 0); | |
1390 | info->shifter.kind = | |
78933a4a | 1391 | aarch64_get_operand_modifier_from_value (value, true /* extend_p */); |
a06ea964 NC |
1392 | /* imm3 */ |
1393 | info->shifter.amount = extract_field (FLD_imm3, code, 0); | |
1394 | ||
1395 | /* This makes the constraint checking happy. */ | |
1396 | info->shifter.operator_present = 1; | |
1397 | ||
1398 | /* Assume inst->operands[0].qualifier has been resolved. */ | |
1399 | assert (inst->operands[0].qualifier != AARCH64_OPND_QLF_NIL); | |
1400 | info->qualifier = AARCH64_OPND_QLF_W; | |
1401 | if (inst->operands[0].qualifier == AARCH64_OPND_QLF_X | |
1402 | && (info->shifter.kind == AARCH64_MOD_UXTX | |
1403 | || info->shifter.kind == AARCH64_MOD_SXTX)) | |
1404 | info->qualifier = AARCH64_OPND_QLF_X; | |
1405 | ||
78933a4a | 1406 | return true; |
a06ea964 NC |
1407 | } |
1408 | ||
1409 | /* Decode the shifted register operand for e.g. | |
1410 | SUBS <Xd>, <Xn>, <Xm> {, <shift> #<amount>}. */ | |
78933a4a | 1411 | bool |
a06ea964 NC |
1412 | aarch64_ext_reg_shifted (const aarch64_operand *self ATTRIBUTE_UNUSED, |
1413 | aarch64_opnd_info *info, | |
1414 | aarch64_insn code, | |
561a72d4 TC |
1415 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1416 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
1417 | { |
1418 | aarch64_insn value; | |
1419 | ||
1420 | /* Rm */ | |
1421 | info->reg.regno = extract_field (FLD_Rm, code, 0); | |
1422 | /* shift */ | |
1423 | value = extract_field (FLD_shift, code, 0); | |
1424 | info->shifter.kind = | |
78933a4a | 1425 | aarch64_get_operand_modifier_from_value (value, false /* extend_p */); |
a06ea964 NC |
1426 | if (info->shifter.kind == AARCH64_MOD_ROR |
1427 | && inst->opcode->iclass != log_shift) | |
1428 | /* ROR is not available for the shifted register operand in arithmetic | |
1429 | instructions. */ | |
78933a4a | 1430 | return false; |
a06ea964 NC |
1431 | /* imm6 */ |
1432 | info->shifter.amount = extract_field (FLD_imm6, code, 0); | |
1433 | ||
1434 | /* This makes the constraint checking happy. */ | |
1435 | info->shifter.operator_present = 1; | |
1436 | ||
78933a4a | 1437 | return true; |
a06ea964 | 1438 | } |
f11ad6bc | 1439 | |
98907a70 RS |
1440 | /* Decode an SVE address [<base>, #<offset>*<factor>, MUL VL], |
1441 | where <offset> is given by the OFFSET parameter and where <factor> is | |
1442 | 1 plus SELF's operand-dependent value. fields[0] specifies the field | |
1443 | that holds <base>. */ | |
78933a4a | 1444 | static bool |
98907a70 RS |
1445 | aarch64_ext_sve_addr_reg_mul_vl (const aarch64_operand *self, |
1446 | aarch64_opnd_info *info, aarch64_insn code, | |
1447 | int64_t offset) | |
1448 | { | |
1449 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
1450 | info->addr.offset.imm = offset * (1 + get_operand_specific_data (self)); | |
78933a4a AM |
1451 | info->addr.offset.is_reg = false; |
1452 | info->addr.writeback = false; | |
1453 | info->addr.preind = true; | |
98907a70 RS |
1454 | if (offset != 0) |
1455 | info->shifter.kind = AARCH64_MOD_MUL_VL; | |
1456 | info->shifter.amount = 1; | |
1457 | info->shifter.operator_present = (info->addr.offset.imm != 0); | |
78933a4a AM |
1458 | info->shifter.amount_present = false; |
1459 | return true; | |
98907a70 RS |
1460 | } |
1461 | ||
1462 | /* Decode an SVE address [<base>, #<simm4>*<factor>, MUL VL], | |
1463 | where <simm4> is a 4-bit signed value and where <factor> is 1 plus | |
1464 | SELF's operand-dependent value. fields[0] specifies the field that | |
1465 | holds <base>. <simm4> is encoded in the SVE_imm4 field. */ | |
78933a4a | 1466 | bool |
98907a70 RS |
1467 | aarch64_ext_sve_addr_ri_s4xvl (const aarch64_operand *self, |
1468 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1469 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1470 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
98907a70 RS |
1471 | { |
1472 | int offset; | |
1473 | ||
1474 | offset = extract_field (FLD_SVE_imm4, code, 0); | |
1475 | offset = ((offset + 8) & 15) - 8; | |
1476 | return aarch64_ext_sve_addr_reg_mul_vl (self, info, code, offset); | |
1477 | } | |
1478 | ||
1479 | /* Decode an SVE address [<base>, #<simm6>*<factor>, MUL VL], | |
1480 | where <simm6> is a 6-bit signed value and where <factor> is 1 plus | |
1481 | SELF's operand-dependent value. fields[0] specifies the field that | |
1482 | holds <base>. <simm6> is encoded in the SVE_imm6 field. */ | |
78933a4a | 1483 | bool |
98907a70 RS |
1484 | aarch64_ext_sve_addr_ri_s6xvl (const aarch64_operand *self, |
1485 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1486 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1487 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
98907a70 RS |
1488 | { |
1489 | int offset; | |
1490 | ||
1491 | offset = extract_field (FLD_SVE_imm6, code, 0); | |
1492 | offset = (((offset + 32) & 63) - 32); | |
1493 | return aarch64_ext_sve_addr_reg_mul_vl (self, info, code, offset); | |
1494 | } | |
1495 | ||
1496 | /* Decode an SVE address [<base>, #<simm9>*<factor>, MUL VL], | |
1497 | where <simm9> is a 9-bit signed value and where <factor> is 1 plus | |
1498 | SELF's operand-dependent value. fields[0] specifies the field that | |
1499 | holds <base>. <simm9> is encoded in the concatenation of the SVE_imm6 | |
1500 | and imm3 fields, with imm3 being the less-significant part. */ | |
78933a4a | 1501 | bool |
98907a70 RS |
1502 | aarch64_ext_sve_addr_ri_s9xvl (const aarch64_operand *self, |
1503 | aarch64_opnd_info *info, | |
1504 | aarch64_insn code, | |
561a72d4 TC |
1505 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1506 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
98907a70 RS |
1507 | { |
1508 | int offset; | |
1509 | ||
1510 | offset = extract_fields (code, 0, 2, FLD_SVE_imm6, FLD_imm3); | |
1511 | offset = (((offset + 256) & 511) - 256); | |
1512 | return aarch64_ext_sve_addr_reg_mul_vl (self, info, code, offset); | |
1513 | } | |
1514 | ||
4df068de RS |
1515 | /* Decode an SVE address [<base>, #<offset> << <shift>], where <offset> |
1516 | is given by the OFFSET parameter and where <shift> is SELF's operand- | |
1517 | dependent value. fields[0] specifies the base register field <base>. */ | |
78933a4a | 1518 | static bool |
4df068de RS |
1519 | aarch64_ext_sve_addr_reg_imm (const aarch64_operand *self, |
1520 | aarch64_opnd_info *info, aarch64_insn code, | |
1521 | int64_t offset) | |
1522 | { | |
1523 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
1524 | info->addr.offset.imm = offset * (1 << get_operand_specific_data (self)); | |
78933a4a AM |
1525 | info->addr.offset.is_reg = false; |
1526 | info->addr.writeback = false; | |
1527 | info->addr.preind = true; | |
1528 | info->shifter.operator_present = false; | |
1529 | info->shifter.amount_present = false; | |
1530 | return true; | |
4df068de RS |
1531 | } |
1532 | ||
582e12bf RS |
1533 | /* Decode an SVE address [X<n>, #<SVE_imm4> << <shift>], where <SVE_imm4> |
1534 | is a 4-bit signed number and where <shift> is SELF's operand-dependent | |
1535 | value. fields[0] specifies the base register field. */ | |
78933a4a | 1536 | bool |
582e12bf RS |
1537 | aarch64_ext_sve_addr_ri_s4 (const aarch64_operand *self, |
1538 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1539 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1540 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
582e12bf RS |
1541 | { |
1542 | int offset = sign_extend (extract_field (FLD_SVE_imm4, code, 0), 3); | |
1543 | return aarch64_ext_sve_addr_reg_imm (self, info, code, offset); | |
1544 | } | |
1545 | ||
4df068de RS |
1546 | /* Decode an SVE address [X<n>, #<SVE_imm6> << <shift>], where <SVE_imm6> |
1547 | is a 6-bit unsigned number and where <shift> is SELF's operand-dependent | |
1548 | value. fields[0] specifies the base register field. */ | |
78933a4a | 1549 | bool |
4df068de RS |
1550 | aarch64_ext_sve_addr_ri_u6 (const aarch64_operand *self, |
1551 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1552 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1553 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
4df068de RS |
1554 | { |
1555 | int offset = extract_field (FLD_SVE_imm6, code, 0); | |
1556 | return aarch64_ext_sve_addr_reg_imm (self, info, code, offset); | |
1557 | } | |
1558 | ||
1559 | /* Decode an SVE address [X<n>, X<m>{, LSL #<shift>}], where <shift> | |
1560 | is SELF's operand-dependent value. fields[0] specifies the base | |
1561 | register field and fields[1] specifies the offset register field. */ | |
78933a4a | 1562 | bool |
4df068de RS |
1563 | aarch64_ext_sve_addr_rr_lsl (const aarch64_operand *self, |
1564 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1565 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1566 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
4df068de | 1567 | { |
eaf02703 | 1568 | int index_regno; |
4df068de | 1569 | |
eaf02703 MR |
1570 | index_regno = extract_field (self->fields[1], code, 0); |
1571 | if (index_regno == 31 && (self->flags & OPD_F_NO_ZR) != 0) | |
78933a4a | 1572 | return false; |
4df068de RS |
1573 | |
1574 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
eaf02703 | 1575 | info->addr.offset.regno = index_regno; |
78933a4a AM |
1576 | info->addr.offset.is_reg = true; |
1577 | info->addr.writeback = false; | |
1578 | info->addr.preind = true; | |
4df068de RS |
1579 | info->shifter.kind = AARCH64_MOD_LSL; |
1580 | info->shifter.amount = get_operand_specific_data (self); | |
1581 | info->shifter.operator_present = (info->shifter.amount != 0); | |
1582 | info->shifter.amount_present = (info->shifter.amount != 0); | |
78933a4a | 1583 | return true; |
4df068de RS |
1584 | } |
1585 | ||
1586 | /* Decode an SVE address [X<n>, Z<m>.<T>, (S|U)XTW {#<shift>}], where | |
1587 | <shift> is SELF's operand-dependent value. fields[0] specifies the | |
1588 | base register field, fields[1] specifies the offset register field and | |
1589 | fields[2] is a single-bit field that selects SXTW over UXTW. */ | |
78933a4a | 1590 | bool |
4df068de RS |
1591 | aarch64_ext_sve_addr_rz_xtw (const aarch64_operand *self, |
1592 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1593 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1594 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
4df068de RS |
1595 | { |
1596 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
1597 | info->addr.offset.regno = extract_field (self->fields[1], code, 0); | |
78933a4a AM |
1598 | info->addr.offset.is_reg = true; |
1599 | info->addr.writeback = false; | |
1600 | info->addr.preind = true; | |
4df068de RS |
1601 | if (extract_field (self->fields[2], code, 0)) |
1602 | info->shifter.kind = AARCH64_MOD_SXTW; | |
1603 | else | |
1604 | info->shifter.kind = AARCH64_MOD_UXTW; | |
1605 | info->shifter.amount = get_operand_specific_data (self); | |
78933a4a | 1606 | info->shifter.operator_present = true; |
4df068de | 1607 | info->shifter.amount_present = (info->shifter.amount != 0); |
78933a4a | 1608 | return true; |
4df068de RS |
1609 | } |
1610 | ||
1611 | /* Decode an SVE address [Z<n>.<T>, #<imm5> << <shift>], where <imm5> is a | |
1612 | 5-bit unsigned number and where <shift> is SELF's operand-dependent value. | |
1613 | fields[0] specifies the base register field. */ | |
78933a4a | 1614 | bool |
4df068de RS |
1615 | aarch64_ext_sve_addr_zi_u5 (const aarch64_operand *self, |
1616 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1617 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1618 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
4df068de RS |
1619 | { |
1620 | int offset = extract_field (FLD_imm5, code, 0); | |
1621 | return aarch64_ext_sve_addr_reg_imm (self, info, code, offset); | |
1622 | } | |
1623 | ||
1624 | /* Decode an SVE address [Z<n>.<T>, Z<m>.<T>{, <modifier> {#<msz>}}], | |
1625 | where <modifier> is given by KIND and where <msz> is a 2-bit unsigned | |
1626 | number. fields[0] specifies the base register field and fields[1] | |
1627 | specifies the offset register field. */ | |
78933a4a | 1628 | static bool |
4df068de RS |
1629 | aarch64_ext_sve_addr_zz (const aarch64_operand *self, aarch64_opnd_info *info, |
1630 | aarch64_insn code, enum aarch64_modifier_kind kind) | |
1631 | { | |
1632 | info->addr.base_regno = extract_field (self->fields[0], code, 0); | |
1633 | info->addr.offset.regno = extract_field (self->fields[1], code, 0); | |
78933a4a AM |
1634 | info->addr.offset.is_reg = true; |
1635 | info->addr.writeback = false; | |
1636 | info->addr.preind = true; | |
4df068de RS |
1637 | info->shifter.kind = kind; |
1638 | info->shifter.amount = extract_field (FLD_SVE_msz, code, 0); | |
1639 | info->shifter.operator_present = (kind != AARCH64_MOD_LSL | |
1640 | || info->shifter.amount != 0); | |
1641 | info->shifter.amount_present = (info->shifter.amount != 0); | |
78933a4a | 1642 | return true; |
4df068de RS |
1643 | } |
1644 | ||
1645 | /* Decode an SVE address [Z<n>.<T>, Z<m>.<T>{, LSL #<msz>}], where | |
1646 | <msz> is a 2-bit unsigned number. fields[0] specifies the base register | |
1647 | field and fields[1] specifies the offset register field. */ | |
78933a4a | 1648 | bool |
4df068de RS |
1649 | aarch64_ext_sve_addr_zz_lsl (const aarch64_operand *self, |
1650 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1651 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1652 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
4df068de RS |
1653 | { |
1654 | return aarch64_ext_sve_addr_zz (self, info, code, AARCH64_MOD_LSL); | |
1655 | } | |
1656 | ||
1657 | /* Decode an SVE address [Z<n>.<T>, Z<m>.<T>, SXTW {#<msz>}], where | |
1658 | <msz> is a 2-bit unsigned number. fields[0] specifies the base register | |
1659 | field and fields[1] specifies the offset register field. */ | |
78933a4a | 1660 | bool |
4df068de RS |
1661 | aarch64_ext_sve_addr_zz_sxtw (const aarch64_operand *self, |
1662 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1663 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1664 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
4df068de RS |
1665 | { |
1666 | return aarch64_ext_sve_addr_zz (self, info, code, AARCH64_MOD_SXTW); | |
1667 | } | |
1668 | ||
1669 | /* Decode an SVE address [Z<n>.<T>, Z<m>.<T>, UXTW {#<msz>}], where | |
1670 | <msz> is a 2-bit unsigned number. fields[0] specifies the base register | |
1671 | field and fields[1] specifies the offset register field. */ | |
78933a4a | 1672 | bool |
4df068de RS |
1673 | aarch64_ext_sve_addr_zz_uxtw (const aarch64_operand *self, |
1674 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1675 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1676 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
4df068de RS |
1677 | { |
1678 | return aarch64_ext_sve_addr_zz (self, info, code, AARCH64_MOD_UXTW); | |
1679 | } | |
1680 | ||
e950b345 RS |
1681 | /* Finish decoding an SVE arithmetic immediate, given that INFO already |
1682 | has the raw field value and that the low 8 bits decode to VALUE. */ | |
78933a4a | 1683 | static bool |
e950b345 RS |
1684 | decode_sve_aimm (aarch64_opnd_info *info, int64_t value) |
1685 | { | |
1686 | info->shifter.kind = AARCH64_MOD_LSL; | |
1687 | info->shifter.amount = 0; | |
1688 | if (info->imm.value & 0x100) | |
1689 | { | |
1690 | if (value == 0) | |
1691 | /* Decode 0x100 as #0, LSL #8. */ | |
1692 | info->shifter.amount = 8; | |
1693 | else | |
1694 | value *= 256; | |
1695 | } | |
1696 | info->shifter.operator_present = (info->shifter.amount != 0); | |
1697 | info->shifter.amount_present = (info->shifter.amount != 0); | |
1698 | info->imm.value = value; | |
78933a4a | 1699 | return true; |
e950b345 RS |
1700 | } |
1701 | ||
1702 | /* Decode an SVE ADD/SUB immediate. */ | |
78933a4a | 1703 | bool |
e950b345 RS |
1704 | aarch64_ext_sve_aimm (const aarch64_operand *self, |
1705 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
1706 | const aarch64_inst *inst, |
1707 | aarch64_operand_error *errors) | |
e950b345 | 1708 | { |
561a72d4 | 1709 | return (aarch64_ext_imm (self, info, code, inst, errors) |
e950b345 RS |
1710 | && decode_sve_aimm (info, (uint8_t) info->imm.value)); |
1711 | } | |
1712 | ||
1713 | /* Decode an SVE CPY/DUP immediate. */ | |
78933a4a | 1714 | bool |
e950b345 RS |
1715 | aarch64_ext_sve_asimm (const aarch64_operand *self, |
1716 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
1717 | const aarch64_inst *inst, |
1718 | aarch64_operand_error *errors) | |
e950b345 | 1719 | { |
561a72d4 | 1720 | return (aarch64_ext_imm (self, info, code, inst, errors) |
e950b345 RS |
1721 | && decode_sve_aimm (info, (int8_t) info->imm.value)); |
1722 | } | |
1723 | ||
165d4950 RS |
1724 | /* Decode a single-bit immediate that selects between #0.5 and #1.0. |
1725 | The fields array specifies which field to use. */ | |
78933a4a | 1726 | bool |
165d4950 RS |
1727 | aarch64_ext_sve_float_half_one (const aarch64_operand *self, |
1728 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1729 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1730 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
165d4950 RS |
1731 | { |
1732 | if (extract_field (self->fields[0], code, 0)) | |
1733 | info->imm.value = 0x3f800000; | |
1734 | else | |
1735 | info->imm.value = 0x3f000000; | |
78933a4a AM |
1736 | info->imm.is_fp = true; |
1737 | return true; | |
165d4950 RS |
1738 | } |
1739 | ||
1740 | /* Decode a single-bit immediate that selects between #0.5 and #2.0. | |
1741 | The fields array specifies which field to use. */ | |
78933a4a | 1742 | bool |
165d4950 RS |
1743 | aarch64_ext_sve_float_half_two (const aarch64_operand *self, |
1744 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1745 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1746 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
165d4950 RS |
1747 | { |
1748 | if (extract_field (self->fields[0], code, 0)) | |
1749 | info->imm.value = 0x40000000; | |
1750 | else | |
1751 | info->imm.value = 0x3f000000; | |
78933a4a AM |
1752 | info->imm.is_fp = true; |
1753 | return true; | |
165d4950 RS |
1754 | } |
1755 | ||
1756 | /* Decode a single-bit immediate that selects between #0.0 and #1.0. | |
1757 | The fields array specifies which field to use. */ | |
78933a4a | 1758 | bool |
165d4950 RS |
1759 | aarch64_ext_sve_float_zero_one (const aarch64_operand *self, |
1760 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1761 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1762 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
165d4950 RS |
1763 | { |
1764 | if (extract_field (self->fields[0], code, 0)) | |
1765 | info->imm.value = 0x3f800000; | |
1766 | else | |
1767 | info->imm.value = 0x0; | |
78933a4a AM |
1768 | info->imm.is_fp = true; |
1769 | return true; | |
165d4950 RS |
1770 | } |
1771 | ||
7bb5f07c PW |
1772 | /* Decode ZA tile vector, vector indicator, vector selector, qualifier and |
1773 | immediate on numerous SME instruction fields such as MOVA. */ | |
1774 | bool | |
1775 | aarch64_ext_sme_za_hv_tiles (const aarch64_operand *self, | |
1776 | aarch64_opnd_info *info, aarch64_insn code, | |
1777 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
1778 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
1779 | { | |
1780 | int fld_size = extract_field (self->fields[0], code, 0); | |
1781 | int fld_q = extract_field (self->fields[1], code, 0); | |
1782 | int fld_v = extract_field (self->fields[2], code, 0); | |
1783 | int fld_rv = extract_field (self->fields[3], code, 0); | |
1784 | int fld_zan_imm = extract_field (self->fields[4], code, 0); | |
1785 | ||
1786 | /* Deduce qualifier encoded in size and Q fields. */ | |
1787 | if (fld_size == 0) | |
7bb5f07c | 1788 | { |
575c497a RS |
1789 | info->indexed_za.regno = 0; |
1790 | info->indexed_za.index.imm = fld_zan_imm; | |
a5791d58 RS |
1791 | } |
1792 | else if (fld_size == 1) | |
1793 | { | |
575c497a RS |
1794 | info->indexed_za.regno = fld_zan_imm >> 3; |
1795 | info->indexed_za.index.imm = fld_zan_imm & 0x07; | |
a5791d58 RS |
1796 | } |
1797 | else if (fld_size == 2) | |
1798 | { | |
575c497a RS |
1799 | info->indexed_za.regno = fld_zan_imm >> 2; |
1800 | info->indexed_za.index.imm = fld_zan_imm & 0x03; | |
a5791d58 RS |
1801 | } |
1802 | else if (fld_size == 3 && fld_q == 0) | |
1803 | { | |
575c497a RS |
1804 | info->indexed_za.regno = fld_zan_imm >> 1; |
1805 | info->indexed_za.index.imm = fld_zan_imm & 0x01; | |
a5791d58 RS |
1806 | } |
1807 | else if (fld_size == 3 && fld_q == 1) | |
1808 | { | |
575c497a RS |
1809 | info->indexed_za.regno = fld_zan_imm; |
1810 | info->indexed_za.index.imm = 0; | |
7bb5f07c | 1811 | } |
a5791d58 RS |
1812 | else |
1813 | return false; | |
1814 | ||
575c497a RS |
1815 | info->indexed_za.index.regno = fld_rv + 12; |
1816 | info->indexed_za.v = fld_v; | |
7bb5f07c PW |
1817 | |
1818 | return true; | |
1819 | } | |
1820 | ||
01a4d082 PW |
1821 | /* Decode in SME instruction ZERO list of up to eight 64-bit element tile names |
1822 | separated by commas, encoded in the "imm8" field. | |
1823 | ||
1824 | For programmer convenience an assembler must also accept the names of | |
1825 | 32-bit, 16-bit and 8-bit element tiles which are converted into the | |
1826 | corresponding set of 64-bit element tiles. | |
1827 | */ | |
1828 | bool | |
1829 | aarch64_ext_sme_za_list (const aarch64_operand *self, | |
1830 | aarch64_opnd_info *info, aarch64_insn code, | |
1831 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
1832 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
1833 | { | |
1834 | int mask = extract_field (self->fields[0], code, 0); | |
1835 | info->imm.value = mask; | |
1836 | return true; | |
1837 | } | |
1838 | ||
1839 | /* Decode ZA array vector select register (Rv field), optional vector and | |
1840 | memory offset (imm4 field). | |
1841 | */ | |
1842 | bool | |
1843 | aarch64_ext_sme_za_array (const aarch64_operand *self, | |
1844 | aarch64_opnd_info *info, aarch64_insn code, | |
1845 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
1846 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
1847 | { | |
1848 | int regno = extract_field (self->fields[0], code, 0) + 12; | |
1849 | int imm = extract_field (self->fields[1], code, 0); | |
575c497a RS |
1850 | info->indexed_za.index.regno = regno; |
1851 | info->indexed_za.index.imm = imm; | |
01a4d082 PW |
1852 | return true; |
1853 | } | |
1854 | ||
1855 | bool | |
1856 | aarch64_ext_sme_addr_ri_u4xvl (const aarch64_operand *self, | |
1857 | aarch64_opnd_info *info, aarch64_insn code, | |
1858 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
1859 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
1860 | { | |
1861 | int regno = extract_field (self->fields[0], code, 0); | |
1862 | int imm = extract_field (self->fields[1], code, 0); | |
1863 | info->addr.base_regno = regno; | |
1864 | info->addr.offset.imm = imm; | |
1865 | /* MUL VL operator is always present for this operand. */ | |
1866 | info->shifter.kind = AARCH64_MOD_MUL_VL; | |
1867 | info->shifter.operator_present = (imm != 0); | |
1868 | return true; | |
1869 | } | |
1870 | ||
3dd032c5 PW |
1871 | /* Decode {SM|ZA} filed for SMSTART and SMSTOP instructions. */ |
1872 | bool | |
1873 | aarch64_ext_sme_sm_za (const aarch64_operand *self, | |
1874 | aarch64_opnd_info *info, aarch64_insn code, | |
1875 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
1876 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
1877 | { | |
1878 | info->pstatefield = 0x1b; | |
1879 | aarch64_insn fld_crm = extract_field (self->fields[0], code, 0); | |
1880 | fld_crm >>= 1; /* CRm[3:1]. */ | |
1881 | ||
1882 | if (fld_crm == 0x1) | |
1883 | info->reg.regno = 's'; | |
1884 | else if (fld_crm == 0x2) | |
1885 | info->reg.regno = 'z'; | |
1886 | else | |
7060c28e | 1887 | return false; |
3dd032c5 PW |
1888 | |
1889 | return true; | |
1890 | } | |
1891 | ||
d3de0860 PW |
1892 | bool |
1893 | aarch64_ext_sme_pred_reg_with_index (const aarch64_operand *self, | |
1894 | aarch64_opnd_info *info, aarch64_insn code, | |
1895 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
1896 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
1897 | { | |
1898 | aarch64_insn fld_rm = extract_field (self->fields[0], code, 0); | |
1899 | aarch64_insn fld_pn = extract_field (self->fields[1], code, 0); | |
1900 | aarch64_insn fld_i1 = extract_field (self->fields[2], code, 0); | |
1901 | aarch64_insn fld_tszh = extract_field (self->fields[3], code, 0); | |
1902 | aarch64_insn fld_tszl = extract_field (self->fields[4], code, 0); | |
1903 | int imm; | |
1904 | ||
575c497a RS |
1905 | info->indexed_za.regno = fld_pn; |
1906 | info->indexed_za.index.regno = fld_rm + 12; | |
d3de0860 | 1907 | |
a5791d58 RS |
1908 | if (fld_tszl & 0x1) |
1909 | imm = (fld_i1 << 3) | (fld_tszh << 2) | (fld_tszl >> 1); | |
1910 | else if (fld_tszl & 0x2) | |
1911 | imm = (fld_i1 << 2) | (fld_tszh << 1) | (fld_tszl >> 2); | |
1912 | else if (fld_tszl & 0x4) | |
1913 | imm = (fld_i1 << 1) | fld_tszh; | |
1914 | else if (fld_tszh) | |
1915 | imm = fld_i1; | |
d3de0860 PW |
1916 | else |
1917 | return false; | |
1918 | ||
575c497a | 1919 | info->indexed_za.index.imm = imm; |
d3de0860 PW |
1920 | return true; |
1921 | } | |
1922 | ||
f11ad6bc RS |
1923 | /* Decode Zn[MM], where MM has a 7-bit triangular encoding. The fields |
1924 | array specifies which field to use for Zn. MM is encoded in the | |
1925 | concatenation of imm5 and SVE_tszh, with imm5 being the less | |
1926 | significant part. */ | |
78933a4a | 1927 | bool |
f11ad6bc RS |
1928 | aarch64_ext_sve_index (const aarch64_operand *self, |
1929 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1930 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1931 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
f11ad6bc RS |
1932 | { |
1933 | int val; | |
1934 | ||
1935 | info->reglane.regno = extract_field (self->fields[0], code, 0); | |
1936 | val = extract_fields (code, 0, 2, FLD_SVE_tszh, FLD_imm5); | |
582e12bf | 1937 | if ((val & 31) == 0) |
f11ad6bc RS |
1938 | return 0; |
1939 | while ((val & 1) == 0) | |
1940 | val /= 2; | |
1941 | info->reglane.index = val / 2; | |
78933a4a | 1942 | return true; |
f11ad6bc RS |
1943 | } |
1944 | ||
e950b345 | 1945 | /* Decode a logical immediate for the MOV alias of SVE DUPM. */ |
78933a4a | 1946 | bool |
e950b345 RS |
1947 | aarch64_ext_sve_limm_mov (const aarch64_operand *self, |
1948 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 TC |
1949 | const aarch64_inst *inst, |
1950 | aarch64_operand_error *errors) | |
e950b345 RS |
1951 | { |
1952 | int esize = aarch64_get_qualifier_esize (inst->operands[0].qualifier); | |
561a72d4 | 1953 | return (aarch64_ext_limm (self, info, code, inst, errors) |
e950b345 RS |
1954 | && aarch64_sve_dupm_mov_immediate_p (info->imm.value, esize)); |
1955 | } | |
1956 | ||
582e12bf RS |
1957 | /* Decode Zn[MM], where Zn occupies the least-significant part of the field |
1958 | and where MM occupies the most-significant part. The operand-dependent | |
1959 | value specifies the number of bits in Zn. */ | |
78933a4a | 1960 | bool |
582e12bf RS |
1961 | aarch64_ext_sve_quad_index (const aarch64_operand *self, |
1962 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1963 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1964 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
582e12bf RS |
1965 | { |
1966 | unsigned int reg_bits = get_operand_specific_data (self); | |
1967 | unsigned int val = extract_all_fields (self, code); | |
1968 | info->reglane.regno = val & ((1 << reg_bits) - 1); | |
1969 | info->reglane.index = val >> reg_bits; | |
78933a4a | 1970 | return true; |
582e12bf RS |
1971 | } |
1972 | ||
f11ad6bc RS |
1973 | /* Decode {Zn.<T> - Zm.<T>}. The fields array specifies which field |
1974 | to use for Zn. The opcode-dependent value specifies the number | |
1975 | of registers in the list. */ | |
78933a4a | 1976 | bool |
f11ad6bc RS |
1977 | aarch64_ext_sve_reglist (const aarch64_operand *self, |
1978 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 TC |
1979 | const aarch64_inst *inst ATTRIBUTE_UNUSED, |
1980 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
f11ad6bc RS |
1981 | { |
1982 | info->reglist.first_regno = extract_field (self->fields[0], code, 0); | |
1983 | info->reglist.num_regs = get_opcode_dependent_value (inst->opcode); | |
78933a4a | 1984 | return true; |
f11ad6bc | 1985 | } |
2442d846 RS |
1986 | |
1987 | /* Decode <pattern>{, MUL #<amount>}. The fields array specifies which | |
1988 | fields to use for <pattern>. <amount> - 1 is encoded in the SVE_imm4 | |
1989 | field. */ | |
78933a4a | 1990 | bool |
2442d846 RS |
1991 | aarch64_ext_sve_scale (const aarch64_operand *self, |
1992 | aarch64_opnd_info *info, aarch64_insn code, | |
561a72d4 | 1993 | const aarch64_inst *inst, aarch64_operand_error *errors) |
2442d846 RS |
1994 | { |
1995 | int val; | |
1996 | ||
561a72d4 | 1997 | if (!aarch64_ext_imm (self, info, code, inst, errors)) |
78933a4a | 1998 | return false; |
2442d846 RS |
1999 | val = extract_field (FLD_SVE_imm4, code, 0); |
2000 | info->shifter.kind = AARCH64_MOD_MUL; | |
2001 | info->shifter.amount = val + 1; | |
2002 | info->shifter.operator_present = (val != 0); | |
2003 | info->shifter.amount_present = (val != 0); | |
78933a4a | 2004 | return true; |
2442d846 | 2005 | } |
e950b345 RS |
2006 | |
2007 | /* Return the top set bit in VALUE, which is expected to be relatively | |
2008 | small. */ | |
2009 | static uint64_t | |
2010 | get_top_bit (uint64_t value) | |
2011 | { | |
2012 | while ((value & -value) != value) | |
2013 | value -= value & -value; | |
2014 | return value; | |
2015 | } | |
2016 | ||
2017 | /* Decode an SVE shift-left immediate. */ | |
78933a4a | 2018 | bool |
e950b345 RS |
2019 | aarch64_ext_sve_shlimm (const aarch64_operand *self, |
2020 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 | 2021 | const aarch64_inst *inst, aarch64_operand_error *errors) |
e950b345 | 2022 | { |
561a72d4 | 2023 | if (!aarch64_ext_imm (self, info, code, inst, errors) |
e950b345 | 2024 | || info->imm.value == 0) |
78933a4a | 2025 | return false; |
e950b345 RS |
2026 | |
2027 | info->imm.value -= get_top_bit (info->imm.value); | |
78933a4a | 2028 | return true; |
e950b345 RS |
2029 | } |
2030 | ||
2031 | /* Decode an SVE shift-right immediate. */ | |
78933a4a | 2032 | bool |
e950b345 RS |
2033 | aarch64_ext_sve_shrimm (const aarch64_operand *self, |
2034 | aarch64_opnd_info *info, const aarch64_insn code, | |
561a72d4 | 2035 | const aarch64_inst *inst, aarch64_operand_error *errors) |
e950b345 | 2036 | { |
561a72d4 | 2037 | if (!aarch64_ext_imm (self, info, code, inst, errors) |
e950b345 | 2038 | || info->imm.value == 0) |
78933a4a | 2039 | return false; |
e950b345 RS |
2040 | |
2041 | info->imm.value = get_top_bit (info->imm.value) * 2 - info->imm.value; | |
78933a4a | 2042 | return true; |
e950b345 | 2043 | } |
6327658e RS |
2044 | |
2045 | /* Decode X0-X30. Register 31 is unallocated. */ | |
2046 | bool | |
2047 | aarch64_ext_x0_to_x30 (const aarch64_operand *self, aarch64_opnd_info *info, | |
2048 | const aarch64_insn code, | |
2049 | const aarch64_inst *inst ATTRIBUTE_UNUSED, | |
2050 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
2051 | { | |
2052 | info->reg.regno = extract_field (self->fields[0], code, 0); | |
2053 | return info->reg.regno <= 30; | |
2054 | } | |
a06ea964 NC |
2055 | \f |
2056 | /* Bitfields that are commonly used to encode certain operands' information | |
2057 | may be partially used as part of the base opcode in some instructions. | |
2058 | For example, the bit 1 of the field 'size' in | |
2059 | FCVTXN <Vb><d>, <Va><n> | |
2060 | is actually part of the base opcode, while only size<0> is available | |
2061 | for encoding the register type. Another example is the AdvSIMD | |
2062 | instruction ORR (register), in which the field 'size' is also used for | |
2063 | the base opcode, leaving only the field 'Q' available to encode the | |
2064 | vector register arrangement specifier '8B' or '16B'. | |
2065 | ||
2066 | This function tries to deduce the qualifier from the value of partially | |
2067 | constrained field(s). Given the VALUE of such a field or fields, the | |
2068 | qualifiers CANDIDATES and the MASK (indicating which bits are valid for | |
2069 | operand encoding), the function returns the matching qualifier or | |
2070 | AARCH64_OPND_QLF_NIL if nothing matches. | |
2071 | ||
2072 | N.B. CANDIDATES is a group of possible qualifiers that are valid for | |
2073 | one operand; it has a maximum of AARCH64_MAX_QLF_SEQ_NUM qualifiers and | |
2074 | may end with AARCH64_OPND_QLF_NIL. */ | |
2075 | ||
2076 | static enum aarch64_opnd_qualifier | |
2077 | get_qualifier_from_partial_encoding (aarch64_insn value, | |
2078 | const enum aarch64_opnd_qualifier* \ | |
2079 | candidates, | |
2080 | aarch64_insn mask) | |
2081 | { | |
2082 | int i; | |
2083 | DEBUG_TRACE ("enter with value: %d, mask: %d", (int)value, (int)mask); | |
2084 | for (i = 0; i < AARCH64_MAX_QLF_SEQ_NUM; ++i) | |
2085 | { | |
2086 | aarch64_insn standard_value; | |
2087 | if (candidates[i] == AARCH64_OPND_QLF_NIL) | |
2088 | break; | |
2089 | standard_value = aarch64_get_qualifier_standard_value (candidates[i]); | |
2090 | if ((standard_value & mask) == (value & mask)) | |
2091 | return candidates[i]; | |
2092 | } | |
2093 | return AARCH64_OPND_QLF_NIL; | |
2094 | } | |
2095 | ||
2096 | /* Given a list of qualifier sequences, return all possible valid qualifiers | |
2097 | for operand IDX in QUALIFIERS. | |
2098 | Assume QUALIFIERS is an array whose length is large enough. */ | |
2099 | ||
2100 | static void | |
2101 | get_operand_possible_qualifiers (int idx, | |
2102 | const aarch64_opnd_qualifier_seq_t *list, | |
2103 | enum aarch64_opnd_qualifier *qualifiers) | |
2104 | { | |
2105 | int i; | |
2106 | for (i = 0; i < AARCH64_MAX_QLF_SEQ_NUM; ++i) | |
2107 | if ((qualifiers[i] = list[i][idx]) == AARCH64_OPND_QLF_NIL) | |
2108 | break; | |
2109 | } | |
2110 | ||
2111 | /* Decode the size Q field for e.g. SHADD. | |
2112 | We tag one operand with the qualifer according to the code; | |
2113 | whether the qualifier is valid for this opcode or not, it is the | |
2114 | duty of the semantic checking. */ | |
2115 | ||
2116 | static int | |
2117 | decode_sizeq (aarch64_inst *inst) | |
2118 | { | |
2119 | int idx; | |
2120 | enum aarch64_opnd_qualifier qualifier; | |
2121 | aarch64_insn code; | |
2122 | aarch64_insn value, mask; | |
2123 | enum aarch64_field_kind fld_sz; | |
2124 | enum aarch64_opnd_qualifier candidates[AARCH64_MAX_QLF_SEQ_NUM]; | |
2125 | ||
2126 | if (inst->opcode->iclass == asisdlse | |
2127 | || inst->opcode->iclass == asisdlsep | |
2128 | || inst->opcode->iclass == asisdlso | |
2129 | || inst->opcode->iclass == asisdlsop) | |
2130 | fld_sz = FLD_vldst_size; | |
2131 | else | |
2132 | fld_sz = FLD_size; | |
2133 | ||
2134 | code = inst->value; | |
2135 | value = extract_fields (code, inst->opcode->mask, 2, fld_sz, FLD_Q); | |
2136 | /* Obtain the info that which bits of fields Q and size are actually | |
2137 | available for operand encoding. Opcodes like FMAXNM and FMLA have | |
2138 | size[1] unavailable. */ | |
2139 | mask = extract_fields (~inst->opcode->mask, 0, 2, fld_sz, FLD_Q); | |
2140 | ||
2141 | /* The index of the operand we are going to tag a qualifier and the qualifer | |
2142 | itself are reasoned from the value of the size and Q fields and the | |
2143 | possible valid qualifier lists. */ | |
2144 | idx = aarch64_select_operand_for_sizeq_field_coding (inst->opcode); | |
2145 | DEBUG_TRACE ("key idx: %d", idx); | |
2146 | ||
2147 | /* For most related instruciton, size:Q are fully available for operand | |
2148 | encoding. */ | |
2149 | if (mask == 0x7) | |
2150 | { | |
2151 | inst->operands[idx].qualifier = get_vreg_qualifier_from_value (value); | |
2152 | return 1; | |
2153 | } | |
2154 | ||
2155 | get_operand_possible_qualifiers (idx, inst->opcode->qualifiers_list, | |
2156 | candidates); | |
2157 | #ifdef DEBUG_AARCH64 | |
2158 | if (debug_dump) | |
2159 | { | |
2160 | int i; | |
2161 | for (i = 0; candidates[i] != AARCH64_OPND_QLF_NIL | |
2162 | && i < AARCH64_MAX_QLF_SEQ_NUM; ++i) | |
2163 | DEBUG_TRACE ("qualifier %d: %s", i, | |
2164 | aarch64_get_qualifier_name(candidates[i])); | |
2165 | DEBUG_TRACE ("%d, %d", (int)value, (int)mask); | |
2166 | } | |
2167 | #endif /* DEBUG_AARCH64 */ | |
2168 | ||
2169 | qualifier = get_qualifier_from_partial_encoding (value, candidates, mask); | |
2170 | ||
2171 | if (qualifier == AARCH64_OPND_QLF_NIL) | |
2172 | return 0; | |
2173 | ||
2174 | inst->operands[idx].qualifier = qualifier; | |
2175 | return 1; | |
2176 | } | |
2177 | ||
2178 | /* Decode size[0]:Q, i.e. bit 22 and bit 30, for | |
2179 | e.g. FCVTN<Q> <Vd>.<Tb>, <Vn>.<Ta>. */ | |
2180 | ||
2181 | static int | |
2182 | decode_asimd_fcvt (aarch64_inst *inst) | |
2183 | { | |
2184 | aarch64_field field = {0, 0}; | |
2185 | aarch64_insn value; | |
2186 | enum aarch64_opnd_qualifier qualifier; | |
2187 | ||
2188 | gen_sub_field (FLD_size, 0, 1, &field); | |
2189 | value = extract_field_2 (&field, inst->value, 0); | |
2190 | qualifier = value == 0 ? AARCH64_OPND_QLF_V_4S | |
2191 | : AARCH64_OPND_QLF_V_2D; | |
2192 | switch (inst->opcode->op) | |
2193 | { | |
2194 | case OP_FCVTN: | |
2195 | case OP_FCVTN2: | |
2196 | /* FCVTN<Q> <Vd>.<Tb>, <Vn>.<Ta>. */ | |
2197 | inst->operands[1].qualifier = qualifier; | |
2198 | break; | |
2199 | case OP_FCVTL: | |
2200 | case OP_FCVTL2: | |
2201 | /* FCVTL<Q> <Vd>.<Ta>, <Vn>.<Tb>. */ | |
2202 | inst->operands[0].qualifier = qualifier; | |
2203 | break; | |
2204 | default: | |
a06ea964 NC |
2205 | return 0; |
2206 | } | |
2207 | ||
2208 | return 1; | |
2209 | } | |
2210 | ||
2211 | /* Decode size[0], i.e. bit 22, for | |
2212 | e.g. FCVTXN <Vb><d>, <Va><n>. */ | |
2213 | ||
2214 | static int | |
2215 | decode_asisd_fcvtxn (aarch64_inst *inst) | |
2216 | { | |
2217 | aarch64_field field = {0, 0}; | |
2218 | gen_sub_field (FLD_size, 0, 1, &field); | |
2219 | if (!extract_field_2 (&field, inst->value, 0)) | |
2220 | return 0; | |
2221 | inst->operands[0].qualifier = AARCH64_OPND_QLF_S_S; | |
2222 | return 1; | |
2223 | } | |
2224 | ||
2225 | /* Decode the 'opc' field for e.g. FCVT <Dd>, <Sn>. */ | |
2226 | static int | |
2227 | decode_fcvt (aarch64_inst *inst) | |
2228 | { | |
2229 | enum aarch64_opnd_qualifier qualifier; | |
2230 | aarch64_insn value; | |
2231 | const aarch64_field field = {15, 2}; | |
2232 | ||
2233 | /* opc dstsize */ | |
2234 | value = extract_field_2 (&field, inst->value, 0); | |
2235 | switch (value) | |
2236 | { | |
2237 | case 0: qualifier = AARCH64_OPND_QLF_S_S; break; | |
2238 | case 1: qualifier = AARCH64_OPND_QLF_S_D; break; | |
2239 | case 3: qualifier = AARCH64_OPND_QLF_S_H; break; | |
2240 | default: return 0; | |
2241 | } | |
2242 | inst->operands[0].qualifier = qualifier; | |
2243 | ||
2244 | return 1; | |
2245 | } | |
2246 | ||
2247 | /* Do miscellaneous decodings that are not common enough to be driven by | |
2248 | flags. */ | |
2249 | ||
2250 | static int | |
2251 | do_misc_decoding (aarch64_inst *inst) | |
2252 | { | |
c0890d26 | 2253 | unsigned int value; |
a06ea964 NC |
2254 | switch (inst->opcode->op) |
2255 | { | |
2256 | case OP_FCVT: | |
2257 | return decode_fcvt (inst); | |
c0890d26 | 2258 | |
a06ea964 NC |
2259 | case OP_FCVTN: |
2260 | case OP_FCVTN2: | |
2261 | case OP_FCVTL: | |
2262 | case OP_FCVTL2: | |
2263 | return decode_asimd_fcvt (inst); | |
c0890d26 | 2264 | |
a06ea964 NC |
2265 | case OP_FCVTXN_S: |
2266 | return decode_asisd_fcvtxn (inst); | |
c0890d26 RS |
2267 | |
2268 | case OP_MOV_P_P: | |
2269 | case OP_MOVS_P_P: | |
2270 | value = extract_field (FLD_SVE_Pn, inst->value, 0); | |
2271 | return (value == extract_field (FLD_SVE_Pm, inst->value, 0) | |
2272 | && value == extract_field (FLD_SVE_Pg4_10, inst->value, 0)); | |
2273 | ||
2274 | case OP_MOV_Z_P_Z: | |
2275 | return (extract_field (FLD_SVE_Zd, inst->value, 0) | |
2276 | == extract_field (FLD_SVE_Zm_16, inst->value, 0)); | |
2277 | ||
2278 | case OP_MOV_Z_V: | |
2279 | /* Index must be zero. */ | |
2280 | value = extract_fields (inst->value, 0, 2, FLD_SVE_tszh, FLD_imm5); | |
582e12bf | 2281 | return value > 0 && value <= 16 && value == (value & -value); |
c0890d26 RS |
2282 | |
2283 | case OP_MOV_Z_Z: | |
2284 | return (extract_field (FLD_SVE_Zn, inst->value, 0) | |
2285 | == extract_field (FLD_SVE_Zm_16, inst->value, 0)); | |
2286 | ||
2287 | case OP_MOV_Z_Zi: | |
2288 | /* Index must be nonzero. */ | |
2289 | value = extract_fields (inst->value, 0, 2, FLD_SVE_tszh, FLD_imm5); | |
582e12bf | 2290 | return value > 0 && value != (value & -value); |
c0890d26 RS |
2291 | |
2292 | case OP_MOVM_P_P_P: | |
2293 | return (extract_field (FLD_SVE_Pd, inst->value, 0) | |
2294 | == extract_field (FLD_SVE_Pm, inst->value, 0)); | |
2295 | ||
2296 | case OP_MOVZS_P_P_P: | |
2297 | case OP_MOVZ_P_P_P: | |
2298 | return (extract_field (FLD_SVE_Pn, inst->value, 0) | |
2299 | == extract_field (FLD_SVE_Pm, inst->value, 0)); | |
2300 | ||
2301 | case OP_NOTS_P_P_P_Z: | |
2302 | case OP_NOT_P_P_P_Z: | |
2303 | return (extract_field (FLD_SVE_Pm, inst->value, 0) | |
2304 | == extract_field (FLD_SVE_Pg4_10, inst->value, 0)); | |
2305 | ||
a06ea964 NC |
2306 | default: |
2307 | return 0; | |
2308 | } | |
2309 | } | |
2310 | ||
2311 | /* Opcodes that have fields shared by multiple operands are usually flagged | |
2312 | with flags. In this function, we detect such flags, decode the related | |
2313 | field(s) and store the information in one of the related operands. The | |
2314 | 'one' operand is not any operand but one of the operands that can | |
2315 | accommadate all the information that has been decoded. */ | |
2316 | ||
2317 | static int | |
2318 | do_special_decoding (aarch64_inst *inst) | |
2319 | { | |
2320 | int idx; | |
2321 | aarch64_insn value; | |
2322 | /* Condition for truly conditional executed instructions, e.g. b.cond. */ | |
2323 | if (inst->opcode->flags & F_COND) | |
2324 | { | |
2325 | value = extract_field (FLD_cond2, inst->value, 0); | |
2326 | inst->cond = get_cond_from_value (value); | |
2327 | } | |
2328 | /* 'sf' field. */ | |
2329 | if (inst->opcode->flags & F_SF) | |
2330 | { | |
2331 | idx = select_operand_for_sf_field_coding (inst->opcode); | |
2332 | value = extract_field (FLD_sf, inst->value, 0); | |
2333 | inst->operands[idx].qualifier = get_greg_qualifier_from_value (value); | |
2334 | if ((inst->opcode->flags & F_N) | |
2335 | && extract_field (FLD_N, inst->value, 0) != value) | |
2336 | return 0; | |
2337 | } | |
ee804238 JW |
2338 | /* 'sf' field. */ |
2339 | if (inst->opcode->flags & F_LSE_SZ) | |
2340 | { | |
2341 | idx = select_operand_for_sf_field_coding (inst->opcode); | |
2342 | value = extract_field (FLD_lse_sz, inst->value, 0); | |
2343 | inst->operands[idx].qualifier = get_greg_qualifier_from_value (value); | |
2344 | } | |
a06ea964 NC |
2345 | /* size:Q fields. */ |
2346 | if (inst->opcode->flags & F_SIZEQ) | |
2347 | return decode_sizeq (inst); | |
2348 | ||
2349 | if (inst->opcode->flags & F_FPTYPE) | |
2350 | { | |
2351 | idx = select_operand_for_fptype_field_coding (inst->opcode); | |
2352 | value = extract_field (FLD_type, inst->value, 0); | |
2353 | switch (value) | |
2354 | { | |
2355 | case 0: inst->operands[idx].qualifier = AARCH64_OPND_QLF_S_S; break; | |
2356 | case 1: inst->operands[idx].qualifier = AARCH64_OPND_QLF_S_D; break; | |
2357 | case 3: inst->operands[idx].qualifier = AARCH64_OPND_QLF_S_H; break; | |
2358 | default: return 0; | |
2359 | } | |
2360 | } | |
2361 | ||
2362 | if (inst->opcode->flags & F_SSIZE) | |
2363 | { | |
2364 | /* N.B. some opcodes like FCMGT <V><d>, <V><n>, #0 have the size[1] as part | |
2365 | of the base opcode. */ | |
2366 | aarch64_insn mask; | |
2367 | enum aarch64_opnd_qualifier candidates[AARCH64_MAX_QLF_SEQ_NUM]; | |
2368 | idx = select_operand_for_scalar_size_field_coding (inst->opcode); | |
2369 | value = extract_field (FLD_size, inst->value, inst->opcode->mask); | |
2370 | mask = extract_field (FLD_size, ~inst->opcode->mask, 0); | |
2371 | /* For most related instruciton, the 'size' field is fully available for | |
2372 | operand encoding. */ | |
2373 | if (mask == 0x3) | |
2374 | inst->operands[idx].qualifier = get_sreg_qualifier_from_value (value); | |
2375 | else | |
2376 | { | |
2377 | get_operand_possible_qualifiers (idx, inst->opcode->qualifiers_list, | |
2378 | candidates); | |
2379 | inst->operands[idx].qualifier | |
2380 | = get_qualifier_from_partial_encoding (value, candidates, mask); | |
2381 | } | |
2382 | } | |
2383 | ||
2384 | if (inst->opcode->flags & F_T) | |
2385 | { | |
2386 | /* Num of consecutive '0's on the right side of imm5<3:0>. */ | |
2387 | int num = 0; | |
2388 | unsigned val, Q; | |
2389 | assert (aarch64_get_operand_class (inst->opcode->operands[0]) | |
2390 | == AARCH64_OPND_CLASS_SIMD_REG); | |
2391 | /* imm5<3:0> q <t> | |
2392 | 0000 x reserved | |
2393 | xxx1 0 8b | |
2394 | xxx1 1 16b | |
2395 | xx10 0 4h | |
2396 | xx10 1 8h | |
2397 | x100 0 2s | |
2398 | x100 1 4s | |
2399 | 1000 0 reserved | |
2400 | 1000 1 2d */ | |
2401 | val = extract_field (FLD_imm5, inst->value, 0); | |
2402 | while ((val & 0x1) == 0 && ++num <= 3) | |
2403 | val >>= 1; | |
2404 | if (num > 3) | |
2405 | return 0; | |
2406 | Q = (unsigned) extract_field (FLD_Q, inst->value, inst->opcode->mask); | |
2407 | inst->operands[0].qualifier = | |
2408 | get_vreg_qualifier_from_value ((num << 1) | Q); | |
2409 | } | |
2410 | ||
2411 | if (inst->opcode->flags & F_GPRSIZE_IN_Q) | |
2412 | { | |
2413 | /* Use Rt to encode in the case of e.g. | |
2414 | STXP <Ws>, <Xt1>, <Xt2>, [<Xn|SP>{,#0}]. */ | |
2415 | idx = aarch64_operand_index (inst->opcode->operands, AARCH64_OPND_Rt); | |
2416 | if (idx == -1) | |
2417 | { | |
2418 | /* Otherwise use the result operand, which has to be a integer | |
2419 | register. */ | |
2420 | assert (aarch64_get_operand_class (inst->opcode->operands[0]) | |
2421 | == AARCH64_OPND_CLASS_INT_REG); | |
2422 | idx = 0; | |
2423 | } | |
2424 | assert (idx == 0 || idx == 1); | |
2425 | value = extract_field (FLD_Q, inst->value, 0); | |
2426 | inst->operands[idx].qualifier = get_greg_qualifier_from_value (value); | |
2427 | } | |
2428 | ||
2429 | if (inst->opcode->flags & F_LDS_SIZE) | |
2430 | { | |
2431 | aarch64_field field = {0, 0}; | |
2432 | assert (aarch64_get_operand_class (inst->opcode->operands[0]) | |
2433 | == AARCH64_OPND_CLASS_INT_REG); | |
2434 | gen_sub_field (FLD_opc, 0, 1, &field); | |
2435 | value = extract_field_2 (&field, inst->value, 0); | |
2436 | inst->operands[0].qualifier | |
2437 | = value ? AARCH64_OPND_QLF_W : AARCH64_OPND_QLF_X; | |
2438 | } | |
2439 | ||
2440 | /* Miscellaneous decoding; done as the last step. */ | |
2441 | if (inst->opcode->flags & F_MISC) | |
2442 | return do_misc_decoding (inst); | |
2443 | ||
2444 | return 1; | |
2445 | } | |
2446 | ||
2447 | /* Converters converting a real opcode instruction to its alias form. */ | |
2448 | ||
2449 | /* ROR <Wd>, <Ws>, #<shift> | |
2450 | is equivalent to: | |
2451 | EXTR <Wd>, <Ws>, <Ws>, #<shift>. */ | |
2452 | static int | |
2453 | convert_extr_to_ror (aarch64_inst *inst) | |
2454 | { | |
2455 | if (inst->operands[1].reg.regno == inst->operands[2].reg.regno) | |
2456 | { | |
2457 | copy_operand_info (inst, 2, 3); | |
2458 | inst->operands[3].type = AARCH64_OPND_NIL; | |
2459 | return 1; | |
2460 | } | |
2461 | return 0; | |
2462 | } | |
2463 | ||
e30181a5 YZ |
2464 | /* UXTL<Q> <Vd>.<Ta>, <Vn>.<Tb> |
2465 | is equivalent to: | |
2466 | USHLL<Q> <Vd>.<Ta>, <Vn>.<Tb>, #0. */ | |
2467 | static int | |
2468 | convert_shll_to_xtl (aarch64_inst *inst) | |
2469 | { | |
2470 | if (inst->operands[2].imm.value == 0) | |
2471 | { | |
2472 | inst->operands[2].type = AARCH64_OPND_NIL; | |
2473 | return 1; | |
2474 | } | |
2475 | return 0; | |
2476 | } | |
2477 | ||
a06ea964 NC |
2478 | /* Convert |
2479 | UBFM <Xd>, <Xn>, #<shift>, #63. | |
2480 | to | |
2481 | LSR <Xd>, <Xn>, #<shift>. */ | |
2482 | static int | |
2483 | convert_bfm_to_sr (aarch64_inst *inst) | |
2484 | { | |
2485 | int64_t imms, val; | |
2486 | ||
2487 | imms = inst->operands[3].imm.value; | |
2488 | val = inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31 ? 31 : 63; | |
2489 | if (imms == val) | |
2490 | { | |
2491 | inst->operands[3].type = AARCH64_OPND_NIL; | |
2492 | return 1; | |
2493 | } | |
2494 | ||
2495 | return 0; | |
2496 | } | |
2497 | ||
2498 | /* Convert MOV to ORR. */ | |
2499 | static int | |
2500 | convert_orr_to_mov (aarch64_inst *inst) | |
2501 | { | |
2502 | /* MOV <Vd>.<T>, <Vn>.<T> | |
2503 | is equivalent to: | |
2504 | ORR <Vd>.<T>, <Vn>.<T>, <Vn>.<T>. */ | |
2505 | if (inst->operands[1].reg.regno == inst->operands[2].reg.regno) | |
2506 | { | |
2507 | inst->operands[2].type = AARCH64_OPND_NIL; | |
2508 | return 1; | |
2509 | } | |
2510 | return 0; | |
2511 | } | |
2512 | ||
2513 | /* When <imms> >= <immr>, the instruction written: | |
2514 | SBFX <Xd>, <Xn>, #<lsb>, #<width> | |
2515 | is equivalent to: | |
2516 | SBFM <Xd>, <Xn>, #<lsb>, #(<lsb>+<width>-1). */ | |
2517 | ||
2518 | static int | |
2519 | convert_bfm_to_bfx (aarch64_inst *inst) | |
2520 | { | |
2521 | int64_t immr, imms; | |
2522 | ||
2523 | immr = inst->operands[2].imm.value; | |
2524 | imms = inst->operands[3].imm.value; | |
2525 | if (imms >= immr) | |
2526 | { | |
2527 | int64_t lsb = immr; | |
2528 | inst->operands[2].imm.value = lsb; | |
2529 | inst->operands[3].imm.value = imms + 1 - lsb; | |
2530 | /* The two opcodes have different qualifiers for | |
2531 | the immediate operands; reset to help the checking. */ | |
2532 | reset_operand_qualifier (inst, 2); | |
2533 | reset_operand_qualifier (inst, 3); | |
2534 | return 1; | |
2535 | } | |
2536 | ||
2537 | return 0; | |
2538 | } | |
2539 | ||
2540 | /* When <imms> < <immr>, the instruction written: | |
2541 | SBFIZ <Xd>, <Xn>, #<lsb>, #<width> | |
2542 | is equivalent to: | |
2543 | SBFM <Xd>, <Xn>, #((64-<lsb>)&0x3f), #(<width>-1). */ | |
2544 | ||
2545 | static int | |
2546 | convert_bfm_to_bfi (aarch64_inst *inst) | |
2547 | { | |
2548 | int64_t immr, imms, val; | |
2549 | ||
2550 | immr = inst->operands[2].imm.value; | |
2551 | imms = inst->operands[3].imm.value; | |
2552 | val = inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31 ? 32 : 64; | |
2553 | if (imms < immr) | |
2554 | { | |
2555 | inst->operands[2].imm.value = (val - immr) & (val - 1); | |
2556 | inst->operands[3].imm.value = imms + 1; | |
2557 | /* The two opcodes have different qualifiers for | |
2558 | the immediate operands; reset to help the checking. */ | |
2559 | reset_operand_qualifier (inst, 2); | |
2560 | reset_operand_qualifier (inst, 3); | |
2561 | return 1; | |
2562 | } | |
2563 | ||
2564 | return 0; | |
2565 | } | |
2566 | ||
d685192a MW |
2567 | /* The instruction written: |
2568 | BFC <Xd>, #<lsb>, #<width> | |
2569 | is equivalent to: | |
2570 | BFM <Xd>, XZR, #((64-<lsb>)&0x3f), #(<width>-1). */ | |
2571 | ||
2572 | static int | |
2573 | convert_bfm_to_bfc (aarch64_inst *inst) | |
2574 | { | |
2575 | int64_t immr, imms, val; | |
2576 | ||
2577 | /* Should have been assured by the base opcode value. */ | |
2578 | assert (inst->operands[1].reg.regno == 0x1f); | |
2579 | ||
2580 | immr = inst->operands[2].imm.value; | |
2581 | imms = inst->operands[3].imm.value; | |
2582 | val = inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31 ? 32 : 64; | |
2583 | if (imms < immr) | |
2584 | { | |
2585 | /* Drop XZR from the second operand. */ | |
2586 | copy_operand_info (inst, 1, 2); | |
2587 | copy_operand_info (inst, 2, 3); | |
2588 | inst->operands[3].type = AARCH64_OPND_NIL; | |
2589 | ||
2590 | /* Recalculate the immediates. */ | |
2591 | inst->operands[1].imm.value = (val - immr) & (val - 1); | |
2592 | inst->operands[2].imm.value = imms + 1; | |
2593 | ||
2594 | /* The two opcodes have different qualifiers for the operands; reset to | |
2595 | help the checking. */ | |
2596 | reset_operand_qualifier (inst, 1); | |
2597 | reset_operand_qualifier (inst, 2); | |
2598 | reset_operand_qualifier (inst, 3); | |
2599 | ||
2600 | return 1; | |
2601 | } | |
2602 | ||
2603 | return 0; | |
2604 | } | |
2605 | ||
a06ea964 NC |
2606 | /* The instruction written: |
2607 | LSL <Xd>, <Xn>, #<shift> | |
2608 | is equivalent to: | |
2609 | UBFM <Xd>, <Xn>, #((64-<shift>)&0x3f), #(63-<shift>). */ | |
2610 | ||
2611 | static int | |
2612 | convert_ubfm_to_lsl (aarch64_inst *inst) | |
2613 | { | |
2614 | int64_t immr = inst->operands[2].imm.value; | |
2615 | int64_t imms = inst->operands[3].imm.value; | |
2616 | int64_t val | |
2617 | = inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31 ? 31 : 63; | |
2618 | ||
2619 | if ((immr == 0 && imms == val) || immr == imms + 1) | |
2620 | { | |
2621 | inst->operands[3].type = AARCH64_OPND_NIL; | |
2622 | inst->operands[2].imm.value = val - imms; | |
2623 | return 1; | |
2624 | } | |
2625 | ||
2626 | return 0; | |
2627 | } | |
2628 | ||
2629 | /* CINC <Wd>, <Wn>, <cond> | |
2630 | is equivalent to: | |
68a64283 YZ |
2631 | CSINC <Wd>, <Wn>, <Wn>, invert(<cond>) |
2632 | where <cond> is not AL or NV. */ | |
a06ea964 NC |
2633 | |
2634 | static int | |
2635 | convert_from_csel (aarch64_inst *inst) | |
2636 | { | |
68a64283 YZ |
2637 | if (inst->operands[1].reg.regno == inst->operands[2].reg.regno |
2638 | && (inst->operands[3].cond->value & 0xe) != 0xe) | |
a06ea964 NC |
2639 | { |
2640 | copy_operand_info (inst, 2, 3); | |
2641 | inst->operands[2].cond = get_inverted_cond (inst->operands[3].cond); | |
2642 | inst->operands[3].type = AARCH64_OPND_NIL; | |
2643 | return 1; | |
2644 | } | |
2645 | return 0; | |
2646 | } | |
2647 | ||
2648 | /* CSET <Wd>, <cond> | |
2649 | is equivalent to: | |
68a64283 YZ |
2650 | CSINC <Wd>, WZR, WZR, invert(<cond>) |
2651 | where <cond> is not AL or NV. */ | |
a06ea964 NC |
2652 | |
2653 | static int | |
2654 | convert_csinc_to_cset (aarch64_inst *inst) | |
2655 | { | |
2656 | if (inst->operands[1].reg.regno == 0x1f | |
68a64283 YZ |
2657 | && inst->operands[2].reg.regno == 0x1f |
2658 | && (inst->operands[3].cond->value & 0xe) != 0xe) | |
a06ea964 NC |
2659 | { |
2660 | copy_operand_info (inst, 1, 3); | |
2661 | inst->operands[1].cond = get_inverted_cond (inst->operands[3].cond); | |
2662 | inst->operands[3].type = AARCH64_OPND_NIL; | |
2663 | inst->operands[2].type = AARCH64_OPND_NIL; | |
2664 | return 1; | |
2665 | } | |
2666 | return 0; | |
2667 | } | |
2668 | ||
2669 | /* MOV <Wd>, #<imm> | |
2670 | is equivalent to: | |
2671 | MOVZ <Wd>, #<imm16>, LSL #<shift>. | |
2672 | ||
2673 | A disassembler may output ORR, MOVZ and MOVN as a MOV mnemonic, except when | |
2674 | ORR has an immediate that could be generated by a MOVZ or MOVN instruction, | |
2675 | or where a MOVN has an immediate that could be encoded by MOVZ, or where | |
2676 | MOVZ/MOVN #0 have a shift amount other than LSL #0, in which case the | |
2677 | machine-instruction mnemonic must be used. */ | |
2678 | ||
2679 | static int | |
2680 | convert_movewide_to_mov (aarch64_inst *inst) | |
2681 | { | |
2682 | uint64_t value = inst->operands[1].imm.value; | |
2683 | /* MOVZ/MOVN #0 have a shift amount other than LSL #0. */ | |
2684 | if (value == 0 && inst->operands[1].shifter.amount != 0) | |
2685 | return 0; | |
2686 | inst->operands[1].type = AARCH64_OPND_IMM_MOV; | |
2687 | inst->operands[1].shifter.kind = AARCH64_MOD_NONE; | |
2688 | value <<= inst->operands[1].shifter.amount; | |
2689 | /* As an alias convertor, it has to be clear that the INST->OPCODE | |
2690 | is the opcode of the real instruction. */ | |
2691 | if (inst->opcode->op == OP_MOVN) | |
2692 | { | |
2693 | int is32 = inst->operands[0].qualifier == AARCH64_OPND_QLF_W; | |
2694 | value = ~value; | |
2695 | /* A MOVN has an immediate that could be encoded by MOVZ. */ | |
535b785f | 2696 | if (aarch64_wide_constant_p (value, is32, NULL)) |
a06ea964 NC |
2697 | return 0; |
2698 | } | |
2699 | inst->operands[1].imm.value = value; | |
2700 | inst->operands[1].shifter.amount = 0; | |
2701 | return 1; | |
2702 | } | |
2703 | ||
2704 | /* MOV <Wd>, #<imm> | |
2705 | is equivalent to: | |
2706 | ORR <Wd>, WZR, #<imm>. | |
2707 | ||
2708 | A disassembler may output ORR, MOVZ and MOVN as a MOV mnemonic, except when | |
2709 | ORR has an immediate that could be generated by a MOVZ or MOVN instruction, | |
2710 | or where a MOVN has an immediate that could be encoded by MOVZ, or where | |
2711 | MOVZ/MOVN #0 have a shift amount other than LSL #0, in which case the | |
2712 | machine-instruction mnemonic must be used. */ | |
2713 | ||
2714 | static int | |
2715 | convert_movebitmask_to_mov (aarch64_inst *inst) | |
2716 | { | |
2717 | int is32; | |
2718 | uint64_t value; | |
2719 | ||
2720 | /* Should have been assured by the base opcode value. */ | |
2721 | assert (inst->operands[1].reg.regno == 0x1f); | |
2722 | copy_operand_info (inst, 1, 2); | |
2723 | is32 = inst->operands[0].qualifier == AARCH64_OPND_QLF_W; | |
2724 | inst->operands[1].type = AARCH64_OPND_IMM_MOV; | |
2725 | value = inst->operands[1].imm.value; | |
2726 | /* ORR has an immediate that could be generated by a MOVZ or MOVN | |
2727 | instruction. */ | |
2728 | if (inst->operands[0].reg.regno != 0x1f | |
535b785f AM |
2729 | && (aarch64_wide_constant_p (value, is32, NULL) |
2730 | || aarch64_wide_constant_p (~value, is32, NULL))) | |
a06ea964 NC |
2731 | return 0; |
2732 | ||
2733 | inst->operands[2].type = AARCH64_OPND_NIL; | |
2734 | return 1; | |
2735 | } | |
2736 | ||
2737 | /* Some alias opcodes are disassembled by being converted from their real-form. | |
2738 | N.B. INST->OPCODE is the real opcode rather than the alias. */ | |
2739 | ||
2740 | static int | |
2741 | convert_to_alias (aarch64_inst *inst, const aarch64_opcode *alias) | |
2742 | { | |
2743 | switch (alias->op) | |
2744 | { | |
2745 | case OP_ASR_IMM: | |
2746 | case OP_LSR_IMM: | |
2747 | return convert_bfm_to_sr (inst); | |
2748 | case OP_LSL_IMM: | |
2749 | return convert_ubfm_to_lsl (inst); | |
2750 | case OP_CINC: | |
2751 | case OP_CINV: | |
2752 | case OP_CNEG: | |
2753 | return convert_from_csel (inst); | |
2754 | case OP_CSET: | |
2755 | case OP_CSETM: | |
2756 | return convert_csinc_to_cset (inst); | |
2757 | case OP_UBFX: | |
2758 | case OP_BFXIL: | |
2759 | case OP_SBFX: | |
2760 | return convert_bfm_to_bfx (inst); | |
2761 | case OP_SBFIZ: | |
2762 | case OP_BFI: | |
2763 | case OP_UBFIZ: | |
2764 | return convert_bfm_to_bfi (inst); | |
d685192a MW |
2765 | case OP_BFC: |
2766 | return convert_bfm_to_bfc (inst); | |
a06ea964 NC |
2767 | case OP_MOV_V: |
2768 | return convert_orr_to_mov (inst); | |
2769 | case OP_MOV_IMM_WIDE: | |
2770 | case OP_MOV_IMM_WIDEN: | |
2771 | return convert_movewide_to_mov (inst); | |
2772 | case OP_MOV_IMM_LOG: | |
2773 | return convert_movebitmask_to_mov (inst); | |
2774 | case OP_ROR_IMM: | |
2775 | return convert_extr_to_ror (inst); | |
e30181a5 YZ |
2776 | case OP_SXTL: |
2777 | case OP_SXTL2: | |
2778 | case OP_UXTL: | |
2779 | case OP_UXTL2: | |
2780 | return convert_shll_to_xtl (inst); | |
a06ea964 NC |
2781 | default: |
2782 | return 0; | |
2783 | } | |
2784 | } | |
2785 | ||
78933a4a | 2786 | static bool |
561a72d4 TC |
2787 | aarch64_opcode_decode (const aarch64_opcode *, const aarch64_insn, |
2788 | aarch64_inst *, int, aarch64_operand_error *errors); | |
a06ea964 NC |
2789 | |
2790 | /* Given the instruction information in *INST, check if the instruction has | |
2791 | any alias form that can be used to represent *INST. If the answer is yes, | |
2792 | update *INST to be in the form of the determined alias. */ | |
2793 | ||
2794 | /* In the opcode description table, the following flags are used in opcode | |
2795 | entries to help establish the relations between the real and alias opcodes: | |
2796 | ||
2797 | F_ALIAS: opcode is an alias | |
2798 | F_HAS_ALIAS: opcode has alias(es) | |
2799 | F_P1 | |
2800 | F_P2 | |
2801 | F_P3: Disassembly preference priority 1-3 (the larger the | |
2802 | higher). If nothing is specified, it is the priority | |
2803 | 0 by default, i.e. the lowest priority. | |
2804 | ||
2805 | Although the relation between the machine and the alias instructions are not | |
2806 | explicitly described, it can be easily determined from the base opcode | |
2807 | values, masks and the flags F_ALIAS and F_HAS_ALIAS in their opcode | |
2808 | description entries: | |
2809 | ||
2810 | The mask of an alias opcode must be equal to or a super-set (i.e. more | |
2811 | constrained) of that of the aliased opcode; so is the base opcode value. | |
2812 | ||
2813 | if (opcode_has_alias (real) && alias_opcode_p (opcode) | |
2814 | && (opcode->mask & real->mask) == real->mask | |
2815 | && (real->mask & opcode->opcode) == (real->mask & real->opcode)) | |
2816 | then OPCODE is an alias of, and only of, the REAL instruction | |
2817 | ||
2818 | The alias relationship is forced flat-structured to keep related algorithm | |
2819 | simple; an opcode entry cannot be flagged with both F_ALIAS and F_HAS_ALIAS. | |
2820 | ||
2821 | During the disassembling, the decoding decision tree (in | |
2822 | opcodes/aarch64-dis-2.c) always returns an machine instruction opcode entry; | |
2823 | if the decoding of such a machine instruction succeeds (and -Mno-aliases is | |
2824 | not specified), the disassembler will check whether there is any alias | |
2825 | instruction exists for this real instruction. If there is, the disassembler | |
2826 | will try to disassemble the 32-bit binary again using the alias's rule, or | |
2827 | try to convert the IR to the form of the alias. In the case of the multiple | |
2828 | aliases, the aliases are tried one by one from the highest priority | |
2829 | (currently the flag F_P3) to the lowest priority (no priority flag), and the | |
2830 | first succeeds first adopted. | |
2831 | ||
2832 | You may ask why there is a need for the conversion of IR from one form to | |
2833 | another in handling certain aliases. This is because on one hand it avoids | |
2834 | adding more operand code to handle unusual encoding/decoding; on other | |
2835 | hand, during the disassembling, the conversion is an effective approach to | |
2836 | check the condition of an alias (as an alias may be adopted only if certain | |
2837 | conditions are met). | |
2838 | ||
2839 | In order to speed up the alias opcode lookup, aarch64-gen has preprocessed | |
2840 | aarch64_opcode_table and generated aarch64_find_alias_opcode and | |
2841 | aarch64_find_next_alias_opcode (in opcodes/aarch64-dis-2.c) to help. */ | |
2842 | ||
2843 | static void | |
561a72d4 TC |
2844 | determine_disassembling_preference (struct aarch64_inst *inst, |
2845 | aarch64_operand_error *errors) | |
a06ea964 NC |
2846 | { |
2847 | const aarch64_opcode *opcode; | |
2848 | const aarch64_opcode *alias; | |
2849 | ||
2850 | opcode = inst->opcode; | |
2851 | ||
2852 | /* This opcode does not have an alias, so use itself. */ | |
535b785f | 2853 | if (!opcode_has_alias (opcode)) |
a06ea964 NC |
2854 | return; |
2855 | ||
2856 | alias = aarch64_find_alias_opcode (opcode); | |
2857 | assert (alias); | |
2858 | ||
2859 | #ifdef DEBUG_AARCH64 | |
2860 | if (debug_dump) | |
2861 | { | |
2862 | const aarch64_opcode *tmp = alias; | |
2863 | printf ("#### LIST orderd: "); | |
2864 | while (tmp) | |
2865 | { | |
2866 | printf ("%s, ", tmp->name); | |
2867 | tmp = aarch64_find_next_alias_opcode (tmp); | |
2868 | } | |
2869 | printf ("\n"); | |
2870 | } | |
2871 | #endif /* DEBUG_AARCH64 */ | |
2872 | ||
2873 | for (; alias; alias = aarch64_find_next_alias_opcode (alias)) | |
2874 | { | |
2875 | DEBUG_TRACE ("try %s", alias->name); | |
35822b38 | 2876 | assert (alias_opcode_p (alias) || opcode_has_alias (opcode)); |
a06ea964 NC |
2877 | |
2878 | /* An alias can be a pseudo opcode which will never be used in the | |
2879 | disassembly, e.g. BIC logical immediate is such a pseudo opcode | |
2880 | aliasing AND. */ | |
2881 | if (pseudo_opcode_p (alias)) | |
2882 | { | |
2883 | DEBUG_TRACE ("skip pseudo %s", alias->name); | |
2884 | continue; | |
2885 | } | |
2886 | ||
2887 | if ((inst->value & alias->mask) != alias->opcode) | |
2888 | { | |
2889 | DEBUG_TRACE ("skip %s as base opcode not match", alias->name); | |
2890 | continue; | |
2891 | } | |
95830c98 AC |
2892 | |
2893 | if (!AARCH64_CPU_HAS_FEATURE (arch_variant, *alias->avariant)) | |
2894 | { | |
2895 | DEBUG_TRACE ("skip %s: we're missing features", alias->name); | |
2896 | continue; | |
2897 | } | |
2898 | ||
a06ea964 NC |
2899 | /* No need to do any complicated transformation on operands, if the alias |
2900 | opcode does not have any operand. */ | |
2901 | if (aarch64_num_of_operands (alias) == 0 && alias->opcode == inst->value) | |
2902 | { | |
2903 | DEBUG_TRACE ("succeed with 0-operand opcode %s", alias->name); | |
2904 | aarch64_replace_opcode (inst, alias); | |
2905 | return; | |
2906 | } | |
2907 | if (alias->flags & F_CONV) | |
2908 | { | |
2909 | aarch64_inst copy; | |
2910 | memcpy (©, inst, sizeof (aarch64_inst)); | |
2911 | /* ALIAS is the preference as long as the instruction can be | |
2912 | successfully converted to the form of ALIAS. */ | |
2913 | if (convert_to_alias (©, alias) == 1) | |
2914 | { | |
2915 | aarch64_replace_opcode (©, alias); | |
7060c28e NC |
2916 | if (aarch64_match_operands_constraint (©, NULL) != 1) |
2917 | { | |
2918 | DEBUG_TRACE ("FAILED with alias %s ", alias->name); | |
2919 | } | |
2920 | else | |
2921 | { | |
2922 | DEBUG_TRACE ("succeed with %s via conversion", alias->name); | |
2923 | memcpy (inst, ©, sizeof (aarch64_inst)); | |
2924 | } | |
a06ea964 NC |
2925 | return; |
2926 | } | |
2927 | } | |
2928 | else | |
2929 | { | |
2930 | /* Directly decode the alias opcode. */ | |
2931 | aarch64_inst temp; | |
2932 | memset (&temp, '\0', sizeof (aarch64_inst)); | |
561a72d4 | 2933 | if (aarch64_opcode_decode (alias, inst->value, &temp, 1, errors) == 1) |
a06ea964 NC |
2934 | { |
2935 | DEBUG_TRACE ("succeed with %s via direct decoding", alias->name); | |
2936 | memcpy (inst, &temp, sizeof (aarch64_inst)); | |
2937 | return; | |
2938 | } | |
2939 | } | |
2940 | } | |
2941 | } | |
2942 | ||
116b6019 RS |
2943 | /* Some instructions (including all SVE ones) use the instruction class |
2944 | to describe how a qualifiers_list index is represented in the instruction | |
2945 | encoding. If INST is such an instruction, decode the appropriate fields | |
2946 | and fill in the operand qualifiers accordingly. Return true if no | |
2947 | problems are found. */ | |
2948 | ||
78933a4a | 2949 | static bool |
116b6019 RS |
2950 | aarch64_decode_variant_using_iclass (aarch64_inst *inst) |
2951 | { | |
2952 | int i, variant; | |
2953 | ||
2954 | variant = 0; | |
2955 | switch (inst->opcode->iclass) | |
2956 | { | |
a5791d58 RS |
2957 | case sme_mov: |
2958 | variant = extract_fields (inst->value, 0, 2, FLD_SME_Q, FLD_SME_size_10); | |
2959 | if (variant >= 4 && variant < 7) | |
2960 | return false; | |
2961 | if (variant == 7) | |
2962 | variant = 4; | |
2963 | break; | |
2964 | ||
2965 | case sme_psel: | |
2966 | i = extract_fields (inst->value, 0, 2, FLD_SME_tszh, FLD_SME_tszl); | |
2967 | if (i == 0) | |
2968 | return false; | |
2969 | while ((i & 1) == 0) | |
2970 | { | |
2971 | i >>= 1; | |
2972 | variant += 1; | |
2973 | } | |
2974 | break; | |
2975 | ||
116b6019 RS |
2976 | case sve_cpy: |
2977 | variant = extract_fields (inst->value, 0, 2, FLD_size, FLD_SVE_M_14); | |
2978 | break; | |
2979 | ||
2980 | case sve_index: | |
582e12bf RS |
2981 | i = extract_fields (inst->value, 0, 2, FLD_SVE_tszh, FLD_imm5); |
2982 | if ((i & 31) == 0) | |
78933a4a | 2983 | return false; |
116b6019 RS |
2984 | while ((i & 1) == 0) |
2985 | { | |
2986 | i >>= 1; | |
2987 | variant += 1; | |
2988 | } | |
2989 | break; | |
2990 | ||
2991 | case sve_limm: | |
2992 | /* Pick the smallest applicable element size. */ | |
2993 | if ((inst->value & 0x20600) == 0x600) | |
2994 | variant = 0; | |
2995 | else if ((inst->value & 0x20400) == 0x400) | |
2996 | variant = 1; | |
2997 | else if ((inst->value & 0x20000) == 0) | |
2998 | variant = 2; | |
2999 | else | |
3000 | variant = 3; | |
3001 | break; | |
3002 | ||
a5791d58 | 3003 | case sme_misc: |
116b6019 | 3004 | case sve_misc: |
a5791d58 | 3005 | /* These instructions have only a single variant. */ |
116b6019 RS |
3006 | break; |
3007 | ||
3008 | case sve_movprfx: | |
3009 | variant = extract_fields (inst->value, 0, 2, FLD_size, FLD_SVE_M_16); | |
3010 | break; | |
3011 | ||
3012 | case sve_pred_zm: | |
3013 | variant = extract_field (FLD_SVE_M_4, inst->value, 0); | |
3014 | break; | |
3015 | ||
3016 | case sve_shift_pred: | |
3017 | i = extract_fields (inst->value, 0, 2, FLD_SVE_tszh, FLD_SVE_tszl_8); | |
3018 | sve_shift: | |
3019 | if (i == 0) | |
78933a4a | 3020 | return false; |
116b6019 RS |
3021 | while (i != 1) |
3022 | { | |
3023 | i >>= 1; | |
3024 | variant += 1; | |
3025 | } | |
3026 | break; | |
3027 | ||
3028 | case sve_shift_unpred: | |
3029 | i = extract_fields (inst->value, 0, 2, FLD_SVE_tszh, FLD_SVE_tszl_19); | |
3030 | goto sve_shift; | |
3031 | ||
3032 | case sve_size_bhs: | |
3033 | variant = extract_field (FLD_size, inst->value, 0); | |
3034 | if (variant >= 3) | |
78933a4a | 3035 | return false; |
116b6019 RS |
3036 | break; |
3037 | ||
3038 | case sve_size_bhsd: | |
3039 | variant = extract_field (FLD_size, inst->value, 0); | |
3040 | break; | |
3041 | ||
3042 | case sve_size_hsd: | |
3043 | i = extract_field (FLD_size, inst->value, 0); | |
3044 | if (i < 1) | |
78933a4a | 3045 | return false; |
116b6019 RS |
3046 | variant = i - 1; |
3047 | break; | |
3048 | ||
3c705960 | 3049 | case sve_size_bh: |
116b6019 RS |
3050 | case sve_size_sd: |
3051 | variant = extract_field (FLD_SVE_sz, inst->value, 0); | |
3052 | break; | |
3053 | ||
0a57e14f MM |
3054 | case sve_size_sd2: |
3055 | variant = extract_field (FLD_SVE_sz2, inst->value, 0); | |
3056 | break; | |
3057 | ||
3bd82c86 MM |
3058 | case sve_size_hsd2: |
3059 | i = extract_field (FLD_SVE_size, inst->value, 0); | |
3060 | if (i < 1) | |
78933a4a | 3061 | return false; |
3bd82c86 MM |
3062 | variant = i - 1; |
3063 | break; | |
3064 | ||
41be57ca MM |
3065 | case sve_size_13: |
3066 | /* Ignore low bit of this field since that is set in the opcode for | |
3067 | instructions of this iclass. */ | |
3068 | i = (extract_field (FLD_size, inst->value, 0) & 2); | |
3069 | variant = (i >> 1); | |
cd50a87a MM |
3070 | break; |
3071 | ||
1be5f94f MM |
3072 | case sve_shift_tsz_bhsd: |
3073 | i = extract_fields (inst->value, 0, 2, FLD_SVE_tszh, FLD_SVE_tszl_19); | |
3074 | if (i == 0) | |
78933a4a | 3075 | return false; |
1be5f94f MM |
3076 | while (i != 1) |
3077 | { | |
3078 | i >>= 1; | |
3079 | variant += 1; | |
3080 | } | |
3081 | break; | |
3082 | ||
fd1dc4a0 MM |
3083 | case sve_size_tsz_bhs: |
3084 | i = extract_fields (inst->value, 0, 2, FLD_SVE_sz, FLD_SVE_tszl_19); | |
9d48687b | 3085 | if (i == 0) |
78933a4a | 3086 | return false; |
fd1dc4a0 MM |
3087 | while (i != 1) |
3088 | { | |
3089 | if (i & 1) | |
78933a4a | 3090 | return false; |
fd1dc4a0 MM |
3091 | i >>= 1; |
3092 | variant += 1; | |
3093 | } | |
3094 | break; | |
3095 | ||
3c17238b MM |
3096 | case sve_shift_tsz_hsd: |
3097 | i = extract_fields (inst->value, 0, 2, FLD_SVE_sz, FLD_SVE_tszl_19); | |
3098 | if (i == 0) | |
78933a4a | 3099 | return false; |
3c17238b MM |
3100 | while (i != 1) |
3101 | { | |
3102 | i >>= 1; | |
3103 | variant += 1; | |
3104 | } | |
3105 | break; | |
3106 | ||
116b6019 RS |
3107 | default: |
3108 | /* No mapping between instruction class and qualifiers. */ | |
78933a4a | 3109 | return true; |
116b6019 RS |
3110 | } |
3111 | ||
3112 | for (i = 0; i < AARCH64_MAX_OPND_NUM; ++i) | |
3113 | inst->operands[i].qualifier = inst->opcode->qualifiers_list[variant][i]; | |
78933a4a | 3114 | return true; |
116b6019 | 3115 | } |
a06ea964 NC |
3116 | /* Decode the CODE according to OPCODE; fill INST. Return 0 if the decoding |
3117 | fails, which meanes that CODE is not an instruction of OPCODE; otherwise | |
3118 | return 1. | |
3119 | ||
3120 | If OPCODE has alias(es) and NOALIASES_P is 0, an alias opcode may be | |
3121 | determined and used to disassemble CODE; this is done just before the | |
3122 | return. */ | |
3123 | ||
78933a4a | 3124 | static bool |
a06ea964 | 3125 | aarch64_opcode_decode (const aarch64_opcode *opcode, const aarch64_insn code, |
561a72d4 TC |
3126 | aarch64_inst *inst, int noaliases_p, |
3127 | aarch64_operand_error *errors) | |
a06ea964 NC |
3128 | { |
3129 | int i; | |
3130 | ||
3131 | DEBUG_TRACE ("enter with %s", opcode->name); | |
3132 | ||
3133 | assert (opcode && inst); | |
3134 | ||
b3ac5c6c TC |
3135 | /* Clear inst. */ |
3136 | memset (inst, '\0', sizeof (aarch64_inst)); | |
3137 | ||
a06ea964 NC |
3138 | /* Check the base opcode. */ |
3139 | if ((code & opcode->mask) != (opcode->opcode & opcode->mask)) | |
3140 | { | |
3141 | DEBUG_TRACE ("base opcode match FAIL"); | |
3142 | goto decode_fail; | |
3143 | } | |
3144 | ||
a06ea964 NC |
3145 | inst->opcode = opcode; |
3146 | inst->value = code; | |
3147 | ||
3148 | /* Assign operand codes and indexes. */ | |
3149 | for (i = 0; i < AARCH64_MAX_OPND_NUM; ++i) | |
3150 | { | |
3151 | if (opcode->operands[i] == AARCH64_OPND_NIL) | |
3152 | break; | |
3153 | inst->operands[i].type = opcode->operands[i]; | |
3154 | inst->operands[i].idx = i; | |
3155 | } | |
3156 | ||
3157 | /* Call the opcode decoder indicated by flags. */ | |
3158 | if (opcode_has_special_coder (opcode) && do_special_decoding (inst) == 0) | |
3159 | { | |
3160 | DEBUG_TRACE ("opcode flag-based decoder FAIL"); | |
3161 | goto decode_fail; | |
3162 | } | |
3163 | ||
116b6019 RS |
3164 | /* Possibly use the instruction class to determine the correct |
3165 | qualifier. */ | |
3166 | if (!aarch64_decode_variant_using_iclass (inst)) | |
3167 | { | |
3168 | DEBUG_TRACE ("iclass-based decoder FAIL"); | |
3169 | goto decode_fail; | |
3170 | } | |
3171 | ||
a06ea964 NC |
3172 | /* Call operand decoders. */ |
3173 | for (i = 0; i < AARCH64_MAX_OPND_NUM; ++i) | |
3174 | { | |
3175 | const aarch64_operand *opnd; | |
3176 | enum aarch64_opnd type; | |
4bd13cde | 3177 | |
a06ea964 NC |
3178 | type = opcode->operands[i]; |
3179 | if (type == AARCH64_OPND_NIL) | |
3180 | break; | |
3181 | opnd = &aarch64_operands[type]; | |
3182 | if (operand_has_extractor (opnd) | |
561a72d4 TC |
3183 | && (! aarch64_extract_operand (opnd, &inst->operands[i], code, inst, |
3184 | errors))) | |
a06ea964 NC |
3185 | { |
3186 | DEBUG_TRACE ("operand decoder FAIL at operand %d", i); | |
3187 | goto decode_fail; | |
3188 | } | |
3189 | } | |
3190 | ||
4bd13cde | 3191 | /* If the opcode has a verifier, then check it now. */ |
755b748f | 3192 | if (opcode->verifier |
78933a4a | 3193 | && opcode->verifier (inst, code, 0, false, errors, NULL) != ERR_OK) |
4bd13cde NC |
3194 | { |
3195 | DEBUG_TRACE ("operand verifier FAIL"); | |
3196 | goto decode_fail; | |
3197 | } | |
3198 | ||
a06ea964 NC |
3199 | /* Match the qualifiers. */ |
3200 | if (aarch64_match_operands_constraint (inst, NULL) == 1) | |
3201 | { | |
3202 | /* Arriving here, the CODE has been determined as a valid instruction | |
3203 | of OPCODE and *INST has been filled with information of this OPCODE | |
3204 | instruction. Before the return, check if the instruction has any | |
3205 | alias and should be disassembled in the form of its alias instead. | |
3206 | If the answer is yes, *INST will be updated. */ | |
3207 | if (!noaliases_p) | |
561a72d4 | 3208 | determine_disassembling_preference (inst, errors); |
a06ea964 | 3209 | DEBUG_TRACE ("SUCCESS"); |
78933a4a | 3210 | return true; |
a06ea964 NC |
3211 | } |
3212 | else | |
3213 | { | |
3214 | DEBUG_TRACE ("constraint matching FAIL"); | |
3215 | } | |
3216 | ||
dc1e8a47 | 3217 | decode_fail: |
78933a4a | 3218 | return false; |
a06ea964 NC |
3219 | } |
3220 | \f | |
3221 | /* This does some user-friendly fix-up to *INST. It is currently focus on | |
3222 | the adjustment of qualifiers to help the printed instruction | |
3223 | recognized/understood more easily. */ | |
3224 | ||
3225 | static void | |
3226 | user_friendly_fixup (aarch64_inst *inst) | |
3227 | { | |
3228 | switch (inst->opcode->iclass) | |
3229 | { | |
3230 | case testbranch: | |
3231 | /* TBNZ Xn|Wn, #uimm6, label | |
3232 | Test and Branch Not Zero: conditionally jumps to label if bit number | |
3233 | uimm6 in register Xn is not zero. The bit number implies the width of | |
3234 | the register, which may be written and should be disassembled as Wn if | |
3235 | uimm is less than 32. Limited to a branch offset range of +/- 32KiB. | |
3236 | */ | |
3237 | if (inst->operands[1].imm.value < 32) | |
3238 | inst->operands[0].qualifier = AARCH64_OPND_QLF_W; | |
3239 | break; | |
3240 | default: break; | |
3241 | } | |
3242 | } | |
3243 | ||
43cdf5ae YQ |
3244 | /* Decode INSN and fill in *INST the instruction information. An alias |
3245 | opcode may be filled in *INSN if NOALIASES_P is FALSE. Return zero on | |
3246 | success. */ | |
a06ea964 | 3247 | |
1d482394 | 3248 | enum err_type |
43cdf5ae | 3249 | aarch64_decode_insn (aarch64_insn insn, aarch64_inst *inst, |
78933a4a | 3250 | bool noaliases_p, |
561a72d4 | 3251 | aarch64_operand_error *errors) |
a06ea964 NC |
3252 | { |
3253 | const aarch64_opcode *opcode = aarch64_opcode_lookup (insn); | |
3254 | ||
3255 | #ifdef DEBUG_AARCH64 | |
3256 | if (debug_dump) | |
3257 | { | |
3258 | const aarch64_opcode *tmp = opcode; | |
3259 | printf ("\n"); | |
3260 | DEBUG_TRACE ("opcode lookup:"); | |
3261 | while (tmp != NULL) | |
3262 | { | |
3263 | aarch64_verbose (" %s", tmp->name); | |
3264 | tmp = aarch64_find_next_opcode (tmp); | |
3265 | } | |
3266 | } | |
3267 | #endif /* DEBUG_AARCH64 */ | |
3268 | ||
3269 | /* A list of opcodes may have been found, as aarch64_opcode_lookup cannot | |
3270 | distinguish some opcodes, e.g. SSHR and MOVI, which almost share the same | |
3271 | opcode field and value, apart from the difference that one of them has an | |
3272 | extra field as part of the opcode, but such a field is used for operand | |
3273 | encoding in other opcode(s) ('immh' in the case of the example). */ | |
3274 | while (opcode != NULL) | |
3275 | { | |
3276 | /* But only one opcode can be decoded successfully for, as the | |
3277 | decoding routine will check the constraint carefully. */ | |
561a72d4 | 3278 | if (aarch64_opcode_decode (opcode, insn, inst, noaliases_p, errors) == 1) |
a06ea964 NC |
3279 | return ERR_OK; |
3280 | opcode = aarch64_find_next_opcode (opcode); | |
3281 | } | |
3282 | ||
3283 | return ERR_UND; | |
3284 | } | |
3285 | ||
76a4c1e0 AB |
3286 | /* Return a short string to indicate a switch to STYLE. These strings |
3287 | will be embedded into the disassembled operand text (as produced by | |
3288 | aarch64_print_operand), and then spotted in the print_operands function | |
3289 | so that the disassembler output can be split by style. */ | |
3290 | ||
3291 | static const char * | |
3292 | get_style_text (enum disassembler_style style) | |
3293 | { | |
3294 | static bool init = false; | |
3295 | static char formats[16][4]; | |
3296 | unsigned num; | |
3297 | ||
3298 | /* First time through we build a string for every possible format. This | |
3299 | code relies on there being no more than 16 different styles (there's | |
3300 | an assert below for this). */ | |
3301 | if (!init) | |
3302 | { | |
3303 | int i; | |
3304 | ||
3305 | for (i = 0; i <= 0xf; ++i) | |
3306 | { | |
3307 | int res = snprintf (&formats[i][0], sizeof (formats[i]), "%c%x%c", | |
3308 | STYLE_MARKER_CHAR, i, STYLE_MARKER_CHAR); | |
3309 | assert (res == 3); | |
3310 | } | |
3311 | ||
3312 | init = true; | |
3313 | } | |
3314 | ||
3315 | /* Return the string that marks switching to STYLE. */ | |
3316 | num = (unsigned) style; | |
3317 | assert (style <= 0xf); | |
3318 | return formats[num]; | |
3319 | } | |
3320 | ||
3321 | /* Callback used by aarch64_print_operand to apply STYLE to the | |
3322 | disassembler output created from FMT and ARGS. The STYLER object holds | |
3323 | any required state. Must return a pointer to a string (created from FMT | |
3324 | and ARGS) that will continue to be valid until the complete disassembled | |
3325 | instruction has been printed. | |
3326 | ||
3327 | We return a string that includes two embedded style markers, the first, | |
3328 | places at the start of the string, indicates a switch to STYLE, and the | |
3329 | second, placed at the end of the string, indicates a switch back to the | |
3330 | default text style. | |
3331 | ||
3332 | Later, when we print the operand text we take care to collapse any | |
3333 | adjacent style markers, and to ignore any style markers that appear at | |
3334 | the very end of a complete operand string. */ | |
3335 | ||
3336 | static const char *aarch64_apply_style (struct aarch64_styler *styler, | |
3337 | enum disassembler_style style, | |
3338 | const char *fmt, | |
3339 | va_list args) | |
3340 | { | |
3341 | int res; | |
3342 | char *ptr, *tmp; | |
3343 | struct obstack *stack = (struct obstack *) styler->state; | |
3344 | va_list ap; | |
3345 | ||
3346 | /* These are the two strings for switching styles. */ | |
3347 | const char *style_on = get_style_text (style); | |
3348 | const char *style_off = get_style_text (dis_style_text); | |
3349 | ||
3350 | /* Calculate space needed once FMT and ARGS are expanded. */ | |
3351 | va_copy (ap, args); | |
3352 | res = vsnprintf (NULL, 0, fmt, ap); | |
3353 | va_end (ap); | |
3354 | assert (res >= 0); | |
3355 | ||
3356 | /* Allocate space on the obstack for the expanded FMT and ARGS, as well | |
3357 | as the two strings for switching styles, then write all of these | |
3358 | strings onto the obstack. */ | |
3359 | ptr = (char *) obstack_alloc (stack, res + strlen (style_on) | |
3360 | + strlen (style_off) + 1); | |
3361 | tmp = stpcpy (ptr, style_on); | |
3362 | res = vsnprintf (tmp, (res + 1), fmt, args); | |
3363 | assert (res >= 0); | |
3364 | tmp += res; | |
3365 | strcpy (tmp, style_off); | |
3366 | ||
3367 | return ptr; | |
3368 | } | |
3369 | ||
a06ea964 NC |
3370 | /* Print operands. */ |
3371 | ||
3372 | static void | |
3373 | print_operands (bfd_vma pc, const aarch64_opcode *opcode, | |
bde90be2 | 3374 | const aarch64_opnd_info *opnds, struct disassemble_info *info, |
78933a4a | 3375 | bool *has_notes) |
a06ea964 | 3376 | { |
7d02540a | 3377 | char *notes = NULL; |
bde90be2 | 3378 | int i, pcrel_p, num_printed; |
76a4c1e0 AB |
3379 | struct aarch64_styler styler; |
3380 | struct obstack content; | |
3381 | obstack_init (&content); | |
3382 | ||
3383 | styler.apply_style = aarch64_apply_style; | |
3384 | styler.state = (void *) &content; | |
3385 | ||
a06ea964 NC |
3386 | for (i = 0, num_printed = 0; i < AARCH64_MAX_OPND_NUM; ++i) |
3387 | { | |
0d2f91fe | 3388 | char str[128]; |
6837a663 AB |
3389 | char cmt[128]; |
3390 | ||
a06ea964 NC |
3391 | /* We regard the opcode operand info more, however we also look into |
3392 | the inst->operands to support the disassembling of the optional | |
3393 | operand. | |
3394 | The two operand code should be the same in all cases, apart from | |
3395 | when the operand can be optional. */ | |
3396 | if (opcode->operands[i] == AARCH64_OPND_NIL | |
3397 | || opnds[i].type == AARCH64_OPND_NIL) | |
3398 | break; | |
3399 | ||
3400 | /* Generate the operand string in STR. */ | |
0d2f91fe | 3401 | aarch64_print_operand (str, sizeof (str), pc, opcode, opnds, i, &pcrel_p, |
6837a663 | 3402 | &info->target, ¬es, cmt, sizeof (cmt), |
76a4c1e0 | 3403 | arch_variant, &styler); |
a06ea964 NC |
3404 | |
3405 | /* Print the delimiter (taking account of omitted operand(s)). */ | |
3406 | if (str[0] != '\0') | |
76a4c1e0 AB |
3407 | (*info->fprintf_styled_func) (info->stream, dis_style_text, "%s", |
3408 | num_printed++ == 0 ? "\t" : ", "); | |
a06ea964 NC |
3409 | |
3410 | /* Print the operand. */ | |
3411 | if (pcrel_p) | |
3412 | (*info->print_address_func) (info->target, info); | |
3413 | else | |
6837a663 | 3414 | { |
76a4c1e0 AB |
3415 | /* This operand came from aarch64_print_operand, and will include |
3416 | embedded strings indicating which style each character should | |
3417 | have. In the following code we split the text based on | |
3418 | CURR_STYLE, and call the styled print callback to print each | |
3419 | block of text in the appropriate style. */ | |
3420 | char *start, *curr; | |
3421 | enum disassembler_style curr_style = dis_style_text; | |
3422 | ||
3423 | start = curr = str; | |
3424 | do | |
3425 | { | |
3426 | if (*curr == '\0' | |
3427 | || (*curr == STYLE_MARKER_CHAR | |
3428 | && ISXDIGIT (*(curr + 1)) | |
3429 | && *(curr + 2) == STYLE_MARKER_CHAR)) | |
3430 | { | |
3431 | /* Output content between our START position and CURR. */ | |
3432 | int len = curr - start; | |
3433 | if (len > 0) | |
3434 | { | |
3435 | if ((*info->fprintf_styled_func) (info->stream, | |
3436 | curr_style, | |
3437 | "%.*s", | |
3438 | len, start) < 0) | |
3439 | break; | |
3440 | } | |
3441 | ||
3442 | if (*curr == '\0') | |
3443 | break; | |
3444 | ||
3445 | /* Skip over the initial STYLE_MARKER_CHAR. */ | |
3446 | ++curr; | |
3447 | ||
3448 | /* Update the CURR_STYLE. As there are less than 16 | |
3449 | styles, it is possible, that if the input is corrupted | |
3450 | in some way, that we might set CURR_STYLE to an | |
3451 | invalid value. Don't worry though, we check for this | |
3452 | situation. */ | |
3453 | if (*curr >= '0' && *curr <= '9') | |
3454 | curr_style = (enum disassembler_style) (*curr - '0'); | |
3455 | else if (*curr >= 'a' && *curr <= 'f') | |
3456 | curr_style = (enum disassembler_style) (*curr - 'a' + 10); | |
3457 | else | |
3458 | curr_style = dis_style_text; | |
3459 | ||
3460 | /* Check for an invalid style having been selected. This | |
3461 | should never happen, but it doesn't hurt to be a | |
3462 | little paranoid. */ | |
3463 | if (curr_style > dis_style_comment_start) | |
3464 | curr_style = dis_style_text; | |
3465 | ||
3466 | /* Skip the hex character, and the closing STYLE_MARKER_CHAR. */ | |
3467 | curr += 2; | |
3468 | ||
3469 | /* Reset the START to after the style marker. */ | |
3470 | start = curr; | |
3471 | } | |
3472 | else | |
3473 | ++curr; | |
3474 | } | |
3475 | while (true); | |
6837a663 | 3476 | } |
76a4c1e0 AB |
3477 | |
3478 | /* Print the comment. This works because only the last operand ever | |
3479 | adds a comment. If that ever changes then we'll need to be | |
3480 | smarter here. */ | |
3481 | if (cmt[0] != '\0') | |
3482 | (*info->fprintf_styled_func) (info->stream, dis_style_comment_start, | |
3483 | "\t// %s", cmt); | |
a06ea964 | 3484 | } |
7d02540a TC |
3485 | |
3486 | if (notes && !no_notes) | |
bde90be2 | 3487 | { |
78933a4a | 3488 | *has_notes = true; |
76a4c1e0 AB |
3489 | (*info->fprintf_styled_func) (info->stream, dis_style_comment_start, |
3490 | " // note: %s", notes); | |
bde90be2 | 3491 | } |
76a4c1e0 AB |
3492 | |
3493 | obstack_free (&content, NULL); | |
a06ea964 NC |
3494 | } |
3495 | ||
bb7eff52 RS |
3496 | /* Set NAME to a copy of INST's mnemonic with the "." suffix removed. */ |
3497 | ||
3498 | static void | |
3499 | remove_dot_suffix (char *name, const aarch64_inst *inst) | |
3500 | { | |
3501 | char *ptr; | |
3502 | size_t len; | |
3503 | ||
3504 | ptr = strchr (inst->opcode->name, '.'); | |
3505 | assert (ptr && inst->cond); | |
3506 | len = ptr - inst->opcode->name; | |
3507 | assert (len < 8); | |
3508 | strncpy (name, inst->opcode->name, len); | |
3509 | name[len] = '\0'; | |
3510 | } | |
3511 | ||
a06ea964 NC |
3512 | /* Print the instruction mnemonic name. */ |
3513 | ||
3514 | static void | |
3515 | print_mnemonic_name (const aarch64_inst *inst, struct disassemble_info *info) | |
3516 | { | |
3517 | if (inst->opcode->flags & F_COND) | |
3518 | { | |
3519 | /* For instructions that are truly conditionally executed, e.g. b.cond, | |
3520 | prepare the full mnemonic name with the corresponding condition | |
3521 | suffix. */ | |
bb7eff52 RS |
3522 | char name[8]; |
3523 | ||
3524 | remove_dot_suffix (name, inst); | |
76a4c1e0 AB |
3525 | (*info->fprintf_styled_func) (info->stream, dis_style_mnemonic, |
3526 | "%s.%s", name, inst->cond->names[0]); | |
a06ea964 NC |
3527 | } |
3528 | else | |
76a4c1e0 AB |
3529 | (*info->fprintf_styled_func) (info->stream, dis_style_mnemonic, |
3530 | "%s", inst->opcode->name); | |
a06ea964 NC |
3531 | } |
3532 | ||
bb7eff52 RS |
3533 | /* Decide whether we need to print a comment after the operands of |
3534 | instruction INST. */ | |
3535 | ||
3536 | static void | |
3537 | print_comment (const aarch64_inst *inst, struct disassemble_info *info) | |
3538 | { | |
3539 | if (inst->opcode->flags & F_COND) | |
3540 | { | |
3541 | char name[8]; | |
3542 | unsigned int i, num_conds; | |
3543 | ||
3544 | remove_dot_suffix (name, inst); | |
3545 | num_conds = ARRAY_SIZE (inst->cond->names); | |
3546 | for (i = 1; i < num_conds && inst->cond->names[i]; ++i) | |
76a4c1e0 AB |
3547 | (*info->fprintf_styled_func) (info->stream, dis_style_comment_start, |
3548 | "%s %s.%s", | |
3549 | i == 1 ? " //" : ",", | |
3550 | name, inst->cond->names[i]); | |
bb7eff52 RS |
3551 | } |
3552 | } | |
3553 | ||
bde90be2 TC |
3554 | /* Build notes from verifiers into a string for printing. */ |
3555 | ||
3556 | static void | |
3557 | print_verifier_notes (aarch64_operand_error *detail, | |
3558 | struct disassemble_info *info) | |
3559 | { | |
3560 | if (no_notes) | |
3561 | return; | |
3562 | ||
3563 | /* The output of the verifier cannot be a fatal error, otherwise the assembly | |
3564 | would not have succeeded. We can safely ignore these. */ | |
3565 | assert (detail->non_fatal); | |
bde90be2 | 3566 | |
76a4c1e0 AB |
3567 | (*info->fprintf_styled_func) (info->stream, dis_style_comment_start, |
3568 | " // note: "); | |
63eff947 RS |
3569 | switch (detail->kind) |
3570 | { | |
3571 | case AARCH64_OPDE_A_SHOULD_FOLLOW_B: | |
76a4c1e0 AB |
3572 | (*info->fprintf_styled_func) (info->stream, dis_style_text, |
3573 | _("this `%s' should have an immediately" | |
3574 | " preceding `%s'"), | |
3575 | detail->data[0].s, detail->data[1].s); | |
63eff947 RS |
3576 | break; |
3577 | ||
3578 | case AARCH64_OPDE_EXPECTED_A_AFTER_B: | |
76a4c1e0 AB |
3579 | (*info->fprintf_styled_func) (info->stream, dis_style_text, |
3580 | _("expected `%s' after previous `%s'"), | |
3581 | detail->data[0].s, detail->data[1].s); | |
63eff947 RS |
3582 | break; |
3583 | ||
3584 | default: | |
69ce6091 | 3585 | assert (detail->error); |
76a4c1e0 AB |
3586 | (*info->fprintf_styled_func) (info->stream, dis_style_text, |
3587 | "%s", detail->error); | |
63eff947 | 3588 | if (detail->index >= 0) |
76a4c1e0 AB |
3589 | (*info->fprintf_styled_func) (info->stream, dis_style_text, |
3590 | " at operand %d", detail->index + 1); | |
63eff947 RS |
3591 | break; |
3592 | } | |
bde90be2 TC |
3593 | } |
3594 | ||
a06ea964 NC |
3595 | /* Print the instruction according to *INST. */ |
3596 | ||
3597 | static void | |
3598 | print_aarch64_insn (bfd_vma pc, const aarch64_inst *inst, | |
bde90be2 TC |
3599 | const aarch64_insn code, |
3600 | struct disassemble_info *info, | |
3601 | aarch64_operand_error *mismatch_details) | |
a06ea964 | 3602 | { |
78933a4a | 3603 | bool has_notes = false; |
bde90be2 | 3604 | |
a06ea964 | 3605 | print_mnemonic_name (inst, info); |
bde90be2 | 3606 | print_operands (pc, inst->opcode, inst->operands, info, &has_notes); |
bb7eff52 | 3607 | print_comment (inst, info); |
bde90be2 TC |
3608 | |
3609 | /* We've already printed a note, not enough space to print more so exit. | |
3610 | Usually notes shouldn't overlap so it shouldn't happen that we have a note | |
3611 | from a register and instruction at the same time. */ | |
3612 | if (has_notes) | |
3613 | return; | |
3614 | ||
3615 | /* Always run constraint verifiers, this is needed because constraints need to | |
3616 | maintain a global state regardless of whether the instruction has the flag | |
3617 | set or not. */ | |
78933a4a | 3618 | enum err_type result = verify_constraints (inst, code, pc, false, |
bde90be2 TC |
3619 | mismatch_details, &insn_sequence); |
3620 | switch (result) | |
3621 | { | |
bde90be2 TC |
3622 | case ERR_VFI: |
3623 | print_verifier_notes (mismatch_details, info); | |
3624 | break; | |
7060c28e NC |
3625 | case ERR_UND: |
3626 | case ERR_UNP: | |
3627 | case ERR_NYI: | |
bde90be2 TC |
3628 | default: |
3629 | break; | |
3630 | } | |
a06ea964 NC |
3631 | } |
3632 | ||
3633 | /* Entry-point of the instruction disassembler and printer. */ | |
3634 | ||
3635 | static void | |
3636 | print_insn_aarch64_word (bfd_vma pc, | |
3637 | uint32_t word, | |
561a72d4 TC |
3638 | struct disassemble_info *info, |
3639 | aarch64_operand_error *errors) | |
a06ea964 | 3640 | { |
1d482394 | 3641 | static const char *err_msg[ERR_NR_ENTRIES+1] = |
a06ea964 | 3642 | { |
1d482394 TC |
3643 | [ERR_OK] = "_", |
3644 | [ERR_UND] = "undefined", | |
3645 | [ERR_UNP] = "unpredictable", | |
3646 | [ERR_NYI] = "NYI" | |
a06ea964 NC |
3647 | }; |
3648 | ||
1d482394 | 3649 | enum err_type ret; |
a06ea964 NC |
3650 | aarch64_inst inst; |
3651 | ||
3652 | info->insn_info_valid = 1; | |
3653 | info->branch_delay_insns = 0; | |
3654 | info->data_size = 0; | |
3655 | info->target = 0; | |
3656 | info->target2 = 0; | |
3657 | ||
3658 | if (info->flags & INSN_HAS_RELOC) | |
3659 | /* If the instruction has a reloc associated with it, then | |
3660 | the offset field in the instruction will actually be the | |
3661 | addend for the reloc. (If we are using REL type relocs). | |
3662 | In such cases, we can ignore the pc when computing | |
3663 | addresses, since the addend is not currently pc-relative. */ | |
3664 | pc = 0; | |
3665 | ||
561a72d4 | 3666 | ret = aarch64_decode_insn (word, &inst, no_aliases, errors); |
a06ea964 NC |
3667 | |
3668 | if (((word >> 21) & 0x3ff) == 1) | |
3669 | { | |
3670 | /* RESERVED for ALES. */ | |
3671 | assert (ret != ERR_OK); | |
3672 | ret = ERR_NYI; | |
3673 | } | |
3674 | ||
3675 | switch (ret) | |
3676 | { | |
3677 | case ERR_UND: | |
3678 | case ERR_UNP: | |
3679 | case ERR_NYI: | |
3680 | /* Handle undefined instructions. */ | |
3681 | info->insn_type = dis_noninsn; | |
76a4c1e0 AB |
3682 | (*info->fprintf_styled_func) (info->stream, |
3683 | dis_style_assembler_directive, | |
3684 | ".inst\t"); | |
3685 | (*info->fprintf_styled_func) (info->stream, dis_style_immediate, | |
3686 | "0x%08x", word); | |
3687 | (*info->fprintf_styled_func) (info->stream, dis_style_comment_start, | |
3688 | " ; %s", err_msg[ret]); | |
a06ea964 NC |
3689 | break; |
3690 | case ERR_OK: | |
3691 | user_friendly_fixup (&inst); | |
bde90be2 | 3692 | print_aarch64_insn (pc, &inst, word, info, errors); |
a06ea964 NC |
3693 | break; |
3694 | default: | |
3695 | abort (); | |
3696 | } | |
3697 | } | |
3698 | ||
3699 | /* Disallow mapping symbols ($x, $d etc) from | |
3700 | being displayed in symbol relative addresses. */ | |
3701 | ||
78933a4a | 3702 | bool |
a06ea964 NC |
3703 | aarch64_symbol_is_valid (asymbol * sym, |
3704 | struct disassemble_info * info ATTRIBUTE_UNUSED) | |
3705 | { | |
3706 | const char * name; | |
3707 | ||
3708 | if (sym == NULL) | |
78933a4a | 3709 | return false; |
a06ea964 NC |
3710 | |
3711 | name = bfd_asymbol_name (sym); | |
3712 | ||
3713 | return name | |
3714 | && (name[0] != '$' | |
3715 | || (name[1] != 'x' && name[1] != 'd') | |
3716 | || (name[2] != '\0' && name[2] != '.')); | |
3717 | } | |
3718 | ||
3719 | /* Print data bytes on INFO->STREAM. */ | |
3720 | ||
3721 | static void | |
3722 | print_insn_data (bfd_vma pc ATTRIBUTE_UNUSED, | |
3723 | uint32_t word, | |
561a72d4 TC |
3724 | struct disassemble_info *info, |
3725 | aarch64_operand_error *errors ATTRIBUTE_UNUSED) | |
a06ea964 NC |
3726 | { |
3727 | switch (info->bytes_per_chunk) | |
3728 | { | |
3729 | case 1: | |
76a4c1e0 AB |
3730 | info->fprintf_styled_func (info->stream, dis_style_assembler_directive, |
3731 | ".byte\t"); | |
3732 | info->fprintf_styled_func (info->stream, dis_style_immediate, | |
3733 | "0x%02x", word); | |
a06ea964 NC |
3734 | break; |
3735 | case 2: | |
76a4c1e0 AB |
3736 | info->fprintf_styled_func (info->stream, dis_style_assembler_directive, |
3737 | ".short\t"); | |
3738 | info->fprintf_styled_func (info->stream, dis_style_immediate, | |
3739 | "0x%04x", word); | |
a06ea964 NC |
3740 | break; |
3741 | case 4: | |
76a4c1e0 AB |
3742 | info->fprintf_styled_func (info->stream, dis_style_assembler_directive, |
3743 | ".word\t"); | |
3744 | info->fprintf_styled_func (info->stream, dis_style_immediate, | |
3745 | "0x%08x", word); | |
a06ea964 NC |
3746 | break; |
3747 | default: | |
3748 | abort (); | |
3749 | } | |
3750 | } | |
3751 | ||
3752 | /* Try to infer the code or data type from a symbol. | |
3753 | Returns nonzero if *MAP_TYPE was set. */ | |
3754 | ||
3755 | static int | |
3756 | get_sym_code_type (struct disassemble_info *info, int n, | |
3757 | enum map_type *map_type) | |
3758 | { | |
ccf61261 | 3759 | asymbol * as; |
a06ea964 NC |
3760 | elf_symbol_type *es; |
3761 | unsigned int type; | |
3762 | const char *name; | |
3763 | ||
4c5ae11b RL |
3764 | /* If the symbol is in a different section, ignore it. */ |
3765 | if (info->section != NULL && info->section != info->symtab[n]->section) | |
78933a4a | 3766 | return false; |
4c5ae11b | 3767 | |
ccf61261 | 3768 | if (n >= info->symtab_size) |
78933a4a | 3769 | return false; |
ccf61261 NC |
3770 | |
3771 | as = info->symtab[n]; | |
3772 | if (bfd_asymbol_flavour (as) != bfd_target_elf_flavour) | |
78933a4a | 3773 | return false; |
ccf61261 NC |
3774 | es = (elf_symbol_type *) as; |
3775 | ||
a06ea964 NC |
3776 | type = ELF_ST_TYPE (es->internal_elf_sym.st_info); |
3777 | ||
3778 | /* If the symbol has function type then use that. */ | |
3779 | if (type == STT_FUNC) | |
3780 | { | |
3781 | *map_type = MAP_INSN; | |
78933a4a | 3782 | return true; |
a06ea964 NC |
3783 | } |
3784 | ||
3785 | /* Check for mapping symbols. */ | |
3786 | name = bfd_asymbol_name(info->symtab[n]); | |
3787 | if (name[0] == '$' | |
3788 | && (name[1] == 'x' || name[1] == 'd') | |
3789 | && (name[2] == '\0' || name[2] == '.')) | |
3790 | { | |
3791 | *map_type = (name[1] == 'x' ? MAP_INSN : MAP_DATA); | |
78933a4a | 3792 | return true; |
a06ea964 NC |
3793 | } |
3794 | ||
78933a4a | 3795 | return false; |
a06ea964 NC |
3796 | } |
3797 | ||
95830c98 AC |
3798 | /* Set the feature bits in arch_variant in order to get the correct disassembly |
3799 | for the chosen architecture variant. | |
3800 | ||
3801 | Currently we only restrict disassembly for Armv8-R and otherwise enable all | |
3802 | non-R-profile features. */ | |
3803 | static void | |
3804 | select_aarch64_variant (unsigned mach) | |
3805 | { | |
3806 | switch (mach) | |
3807 | { | |
3808 | case bfd_mach_aarch64_8R: | |
3809 | arch_variant = AARCH64_ARCH_V8_R; | |
3810 | break; | |
3811 | default: | |
3812 | arch_variant = AARCH64_ANY & ~(AARCH64_FEATURE_V8_R); | |
3813 | } | |
3814 | } | |
3815 | ||
a06ea964 NC |
3816 | /* Entry-point of the AArch64 disassembler. */ |
3817 | ||
3818 | int | |
3819 | print_insn_aarch64 (bfd_vma pc, | |
3820 | struct disassemble_info *info) | |
3821 | { | |
3822 | bfd_byte buffer[INSNLEN]; | |
3823 | int status; | |
561a72d4 TC |
3824 | void (*printer) (bfd_vma, uint32_t, struct disassemble_info *, |
3825 | aarch64_operand_error *); | |
78933a4a | 3826 | bool found = false; |
a06ea964 NC |
3827 | unsigned int size = 4; |
3828 | unsigned long data; | |
561a72d4 | 3829 | aarch64_operand_error errors; |
78933a4a | 3830 | static bool set_features; |
a06ea964 NC |
3831 | |
3832 | if (info->disassembler_options) | |
3833 | { | |
3834 | set_default_aarch64_dis_options (info); | |
3835 | ||
3836 | parse_aarch64_dis_options (info->disassembler_options); | |
3837 | ||
3838 | /* To avoid repeated parsing of these options, we remove them here. */ | |
3839 | info->disassembler_options = NULL; | |
3840 | } | |
3841 | ||
95830c98 AC |
3842 | if (!set_features) |
3843 | { | |
3844 | select_aarch64_variant (info->mach); | |
78933a4a | 3845 | set_features = true; |
95830c98 AC |
3846 | } |
3847 | ||
a06ea964 NC |
3848 | /* Aarch64 instructions are always little-endian */ |
3849 | info->endian_code = BFD_ENDIAN_LITTLE; | |
3850 | ||
51457761 TC |
3851 | /* Default to DATA. A text section is required by the ABI to contain an |
3852 | INSN mapping symbol at the start. A data section has no such | |
3853 | requirement, hence if no mapping symbol is found the section must | |
3854 | contain only data. This however isn't very useful if the user has | |
3855 | fully stripped the binaries. If this is the case use the section | |
3856 | attributes to determine the default. If we have no section default to | |
3857 | INSN as well, as we may be disassembling some raw bytes on a baremetal | |
3858 | HEX file or similar. */ | |
3859 | enum map_type type = MAP_DATA; | |
3860 | if ((info->section && info->section->flags & SEC_CODE) || !info->section) | |
3861 | type = MAP_INSN; | |
3862 | ||
a06ea964 NC |
3863 | /* First check the full symtab for a mapping symbol, even if there |
3864 | are no usable non-mapping symbols for this address. */ | |
3865 | if (info->symtab_size != 0 | |
3866 | && bfd_asymbol_flavour (*info->symtab) == bfd_target_elf_flavour) | |
3867 | { | |
a06ea964 | 3868 | int last_sym = -1; |
51457761 | 3869 | bfd_vma addr, section_vma = 0; |
78933a4a | 3870 | bool can_use_search_opt_p; |
a06ea964 NC |
3871 | int n; |
3872 | ||
3873 | if (pc <= last_mapping_addr) | |
3874 | last_mapping_sym = -1; | |
3875 | ||
3876 | /* Start scanning at the start of the function, or wherever | |
3877 | we finished last time. */ | |
3878 | n = info->symtab_pos + 1; | |
51457761 | 3879 | |
53b2f36b TC |
3880 | /* If the last stop offset is different from the current one it means we |
3881 | are disassembling a different glob of bytes. As such the optimization | |
3882 | would not be safe and we should start over. */ | |
51457761 TC |
3883 | can_use_search_opt_p = last_mapping_sym >= 0 |
3884 | && info->stop_offset == last_stop_offset; | |
3885 | ||
3886 | if (n >= last_mapping_sym && can_use_search_opt_p) | |
a06ea964 NC |
3887 | n = last_mapping_sym; |
3888 | ||
51457761 TC |
3889 | /* Look down while we haven't passed the location being disassembled. |
3890 | The reason for this is that there's no defined order between a symbol | |
3891 | and an mapping symbol that may be at the same address. We may have to | |
3892 | look at least one position ahead. */ | |
a06ea964 NC |
3893 | for (; n < info->symtab_size; n++) |
3894 | { | |
3895 | addr = bfd_asymbol_value (info->symtab[n]); | |
3896 | if (addr > pc) | |
3897 | break; | |
4c5ae11b | 3898 | if (get_sym_code_type (info, n, &type)) |
a06ea964 NC |
3899 | { |
3900 | last_sym = n; | |
78933a4a | 3901 | found = true; |
a06ea964 NC |
3902 | } |
3903 | } | |
3904 | ||
3905 | if (!found) | |
3906 | { | |
3907 | n = info->symtab_pos; | |
51457761 | 3908 | if (n >= last_mapping_sym && can_use_search_opt_p) |
a06ea964 NC |
3909 | n = last_mapping_sym; |
3910 | ||
3911 | /* No mapping symbol found at this address. Look backwards | |
51457761 TC |
3912 | for a preceeding one, but don't go pass the section start |
3913 | otherwise a data section with no mapping symbol can pick up | |
3914 | a text mapping symbol of a preceeding section. The documentation | |
3915 | says section can be NULL, in which case we will seek up all the | |
3916 | way to the top. */ | |
3917 | if (info->section) | |
3918 | section_vma = info->section->vma; | |
3919 | ||
a06ea964 NC |
3920 | for (; n >= 0; n--) |
3921 | { | |
51457761 TC |
3922 | addr = bfd_asymbol_value (info->symtab[n]); |
3923 | if (addr < section_vma) | |
3924 | break; | |
3925 | ||
a06ea964 NC |
3926 | if (get_sym_code_type (info, n, &type)) |
3927 | { | |
3928 | last_sym = n; | |
78933a4a | 3929 | found = true; |
a06ea964 NC |
3930 | break; |
3931 | } | |
3932 | } | |
3933 | } | |
3934 | ||
3935 | last_mapping_sym = last_sym; | |
3936 | last_type = type; | |
53b2f36b | 3937 | last_stop_offset = info->stop_offset; |
a06ea964 NC |
3938 | |
3939 | /* Look a little bit ahead to see if we should print out | |
3940 | less than four bytes of data. If there's a symbol, | |
3941 | mapping or otherwise, after two bytes then don't | |
3942 | print more. */ | |
3943 | if (last_type == MAP_DATA) | |
3944 | { | |
3945 | size = 4 - (pc & 3); | |
3946 | for (n = last_sym + 1; n < info->symtab_size; n++) | |
3947 | { | |
3948 | addr = bfd_asymbol_value (info->symtab[n]); | |
3949 | if (addr > pc) | |
3950 | { | |
3951 | if (addr - pc < size) | |
3952 | size = addr - pc; | |
3953 | break; | |
3954 | } | |
3955 | } | |
3956 | /* If the next symbol is after three bytes, we need to | |
3957 | print only part of the data, so that we can use either | |
3958 | .byte or .short. */ | |
3959 | if (size == 3) | |
3960 | size = (pc & 1) ? 1 : 2; | |
3961 | } | |
3962 | } | |
51457761 TC |
3963 | else |
3964 | last_type = type; | |
a06ea964 | 3965 | |
60df3720 TC |
3966 | /* PR 10263: Disassemble data if requested to do so by the user. */ |
3967 | if (last_type == MAP_DATA && ((info->flags & DISASSEMBLE_DATA) == 0)) | |
a06ea964 NC |
3968 | { |
3969 | /* size was set above. */ | |
3970 | info->bytes_per_chunk = size; | |
3971 | info->display_endian = info->endian; | |
3972 | printer = print_insn_data; | |
3973 | } | |
3974 | else | |
3975 | { | |
3976 | info->bytes_per_chunk = size = INSNLEN; | |
3977 | info->display_endian = info->endian_code; | |
3978 | printer = print_insn_aarch64_word; | |
3979 | } | |
3980 | ||
3981 | status = (*info->read_memory_func) (pc, buffer, size, info); | |
3982 | if (status != 0) | |
3983 | { | |
3984 | (*info->memory_error_func) (status, pc, info); | |
3985 | return -1; | |
3986 | } | |
3987 | ||
3988 | data = bfd_get_bits (buffer, size * 8, | |
3989 | info->display_endian == BFD_ENDIAN_BIG); | |
3990 | ||
561a72d4 | 3991 | (*printer) (pc, data, info, &errors); |
a06ea964 NC |
3992 | |
3993 | return size; | |
3994 | } | |
3995 | \f | |
3996 | void | |
3997 | print_aarch64_disassembler_options (FILE *stream) | |
3998 | { | |
3999 | fprintf (stream, _("\n\ | |
4000 | The following AARCH64 specific disassembler options are supported for use\n\ | |
4001 | with the -M switch (multiple options should be separated by commas):\n")); | |
4002 | ||
4003 | fprintf (stream, _("\n\ | |
4004 | no-aliases Don't print instruction aliases.\n")); | |
4005 | ||
4006 | fprintf (stream, _("\n\ | |
4007 | aliases Do print instruction aliases.\n")); | |
4008 | ||
7d02540a TC |
4009 | fprintf (stream, _("\n\ |
4010 | no-notes Don't print instruction notes.\n")); | |
4011 | ||
4012 | fprintf (stream, _("\n\ | |
4013 | notes Do print instruction notes.\n")); | |
4014 | ||
a06ea964 NC |
4015 | #ifdef DEBUG_AARCH64 |
4016 | fprintf (stream, _("\n\ | |
4017 | debug_dump Temp switch for debug trace.\n")); | |
4018 | #endif /* DEBUG_AARCH64 */ | |
4019 | ||
4020 | fprintf (stream, _("\n")); | |
4021 | } |