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ee86248c | 1 | /* tc-i386.c -- Assemble Intel syntax code for ix86/x86-64 |
219d1afa | 2 | Copyright (C) 2009-2018 Free Software Foundation, Inc. |
ee86248c JB |
3 | |
4 | This file is part of GAS, the GNU Assembler. | |
5 | ||
6 | GAS is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GAS is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GAS; see the file COPYING. If not, write to the Free | |
18 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA | |
19 | 02110-1301, USA. */ | |
20 | ||
21 | static struct | |
22 | { | |
23 | operatorT op_modifier; /* Operand modifier. */ | |
24 | int is_mem; /* 1 if operand is memory reference. */ | |
25303607 | 25 | int is_indirect; /* 1 if operand is indirect reference. */ |
6cee4cda | 26 | int has_offset; /* 1 if operand has offset. */ |
ee86248c JB |
27 | unsigned int in_offset; /* >=1 if processing operand of offset. */ |
28 | unsigned int in_bracket; /* >=1 if processing operand in brackets. */ | |
33eaf5de | 29 | unsigned int in_scale; /* >=1 if processing multiplication operand |
ee86248c JB |
30 | * in brackets. */ |
31 | i386_operand_type reloc_types; /* Value obtained from lex_got(). */ | |
32 | const reg_entry *base; /* Base register (if any). */ | |
33 | const reg_entry *index; /* Index register (if any). */ | |
34 | offsetT scale_factor; /* Accumulated scale factor. */ | |
35 | symbolS *seg; | |
36 | } | |
37 | intel_state; | |
38 | ||
39 | /* offset X_add_symbol */ | |
40 | #define O_offset O_md32 | |
7ac3eb25 L |
41 | /* offset X_add_symbol */ |
42 | #define O_short O_md31 | |
43 | /* near ptr X_add_symbol */ | |
44 | #define O_near_ptr O_md30 | |
45 | /* far ptr X_add_symbol */ | |
46 | #define O_far_ptr O_md29 | |
ee86248c | 47 | /* byte ptr X_add_symbol */ |
7ac3eb25 | 48 | #define O_byte_ptr O_md28 |
ee86248c | 49 | /* word ptr X_add_symbol */ |
7ac3eb25 | 50 | #define O_word_ptr O_md27 |
ee86248c | 51 | /* dword ptr X_add_symbol */ |
7ac3eb25 | 52 | #define O_dword_ptr O_md26 |
ee86248c | 53 | /* qword ptr X_add_symbol */ |
7ac3eb25 | 54 | #define O_qword_ptr O_md25 |
ee86248c | 55 | /* oword ptr X_add_symbol */ |
7ac3eb25 | 56 | #define O_oword_ptr O_md24 |
ee86248c | 57 | /* fword ptr X_add_symbol */ |
7ac3eb25 | 58 | #define O_fword_ptr O_md23 |
ee86248c | 59 | /* tbyte ptr X_add_symbol */ |
7ac3eb25 | 60 | #define O_tbyte_ptr O_md22 |
ee86248c | 61 | /* xmmword ptr X_add_symbol */ |
7ac3eb25 | 62 | #define O_xmmword_ptr O_md21 |
ee86248c | 63 | /* ymmword ptr X_add_symbol */ |
7ac3eb25 | 64 | #define O_ymmword_ptr O_md20 |
43234a1e L |
65 | /* zmmword ptr X_add_symbol */ |
66 | #define O_zmmword_ptr O_md19 | |
ee86248c JB |
67 | |
68 | static struct | |
69 | { | |
70 | const char *name; | |
1e9cc1c2 | 71 | operatorT op; |
ee86248c JB |
72 | unsigned int operands; |
73 | } | |
74 | const i386_operators[] = | |
75 | { | |
76 | { "and", O_bit_and, 2 }, | |
77 | { "eq", O_eq, 2 }, | |
78 | { "ge", O_ge, 2 }, | |
79 | { "gt", O_gt, 2 }, | |
80 | { "le", O_le, 2 }, | |
81 | { "lt", O_lt, 2 }, | |
82 | { "mod", O_modulus, 2 }, | |
83 | { "ne", O_ne, 2 }, | |
84 | { "not", O_bit_not, 1 }, | |
85 | { "offset", O_offset, 1 }, | |
86 | { "or", O_bit_inclusive_or, 2 }, | |
87 | { "shl", O_left_shift, 2 }, | |
88 | { "short", O_short, 1 }, | |
89 | { "shr", O_right_shift, 2 }, | |
90 | { "xor", O_bit_exclusive_or, 2 }, | |
91 | { NULL, O_illegal, 0 } | |
92 | }; | |
93 | ||
94 | static struct | |
95 | { | |
96 | const char *name; | |
1e9cc1c2 | 97 | operatorT op; |
ee86248c JB |
98 | unsigned short sz[3]; |
99 | } | |
100 | const i386_types[] = | |
101 | { | |
102 | #define I386_TYPE(t, n) { #t, O_##t##_ptr, { n, n, n } } | |
103 | I386_TYPE(byte, 1), | |
104 | I386_TYPE(word, 2), | |
105 | I386_TYPE(dword, 4), | |
106 | I386_TYPE(fword, 6), | |
107 | I386_TYPE(qword, 8), | |
108 | I386_TYPE(tbyte, 10), | |
109 | I386_TYPE(oword, 16), | |
110 | I386_TYPE(xmmword, 16), | |
111 | I386_TYPE(ymmword, 32), | |
43234a1e | 112 | I386_TYPE(zmmword, 64), |
ee86248c JB |
113 | #undef I386_TYPE |
114 | { "near", O_near_ptr, { 0xff04, 0xff02, 0xff08 } }, | |
115 | { "far", O_far_ptr, { 0xff06, 0xff05, 0xff06 } }, | |
116 | { NULL, O_illegal, { 0, 0, 0 } } | |
117 | }; | |
118 | ||
119 | operatorT i386_operator (const char *name, unsigned int operands, char *pc) | |
120 | { | |
121 | unsigned int j; | |
122 | ||
123 | if (!intel_syntax) | |
124 | return O_absent; | |
125 | ||
126 | if (!name) | |
127 | { | |
128 | if (operands != 2) | |
129 | return O_illegal; | |
130 | switch (*input_line_pointer) | |
131 | { | |
132 | case ':': | |
133 | ++input_line_pointer; | |
134 | return O_full_ptr; | |
135 | case '[': | |
136 | ++input_line_pointer; | |
137 | return O_index; | |
138 | case '@': | |
139 | if (this_operand >= 0 && i.reloc[this_operand] == NO_RELOC) | |
140 | { | |
141 | int adjust = 0; | |
142 | char *gotfree_input_line = lex_got (&i.reloc[this_operand], | |
143 | &adjust, | |
d258b828 | 144 | &intel_state.reloc_types); |
ee86248c JB |
145 | |
146 | if (!gotfree_input_line) | |
147 | break; | |
148 | free (gotfree_input_line); | |
149 | *input_line_pointer++ = '+'; | |
150 | memset (input_line_pointer, '0', adjust - 1); | |
151 | input_line_pointer[adjust - 1] = ' '; | |
152 | return O_add; | |
153 | } | |
154 | break; | |
155 | } | |
156 | return O_illegal; | |
157 | } | |
158 | ||
159 | for (j = 0; i386_operators[j].name; ++j) | |
91d6fa6a | 160 | if (strcasecmp (i386_operators[j].name, name) == 0) |
ee86248c JB |
161 | { |
162 | if (i386_operators[j].operands | |
163 | && i386_operators[j].operands != operands) | |
164 | return O_illegal; | |
1e9cc1c2 | 165 | return i386_operators[j].op; |
ee86248c JB |
166 | } |
167 | ||
168 | for (j = 0; i386_types[j].name; ++j) | |
91d6fa6a | 169 | if (strcasecmp (i386_types[j].name, name) == 0) |
ee86248c | 170 | break; |
d02603dc | 171 | |
ee86248c JB |
172 | if (i386_types[j].name && *pc == ' ') |
173 | { | |
d02603dc NC |
174 | char *pname; |
175 | char c; | |
176 | ||
177 | ++input_line_pointer; | |
178 | c = get_symbol_name (&pname); | |
ee86248c | 179 | |
91d6fa6a | 180 | if (strcasecmp (pname, "ptr") == 0) |
ee86248c | 181 | { |
d02603dc | 182 | /* FIXME: What if c == '"' ? */ |
91d6fa6a | 183 | pname[-1] = *pc; |
ee86248c JB |
184 | *pc = c; |
185 | if (intel_syntax > 0 || operands != 1) | |
186 | return O_illegal; | |
1e9cc1c2 | 187 | return i386_types[j].op; |
ee86248c JB |
188 | } |
189 | ||
d02603dc | 190 | (void) restore_line_pointer (c); |
91d6fa6a | 191 | input_line_pointer = pname - 1; |
ee86248c JB |
192 | } |
193 | ||
194 | return O_absent; | |
195 | } | |
196 | ||
197 | static int i386_intel_parse_name (const char *name, expressionS *e) | |
198 | { | |
91d6fa6a | 199 | unsigned int j; |
ee86248c | 200 | |
b7adb16d JB |
201 | if (! strcmp (name, "$")) |
202 | { | |
203 | current_location (e); | |
204 | return 1; | |
205 | } | |
206 | ||
91d6fa6a NC |
207 | for (j = 0; i386_types[j].name; ++j) |
208 | if (strcasecmp(i386_types[j].name, name) == 0) | |
ee86248c JB |
209 | { |
210 | e->X_op = O_constant; | |
91d6fa6a | 211 | e->X_add_number = i386_types[j].sz[flag_code]; |
ee86248c JB |
212 | e->X_add_symbol = NULL; |
213 | e->X_op_symbol = NULL; | |
214 | return 1; | |
215 | } | |
216 | ||
217 | return 0; | |
218 | } | |
219 | ||
91d6fa6a | 220 | static INLINE int i386_intel_check (const reg_entry *rreg, |
ee86248c | 221 | const reg_entry *base, |
91d6fa6a | 222 | const reg_entry *iindex) |
ee86248c | 223 | { |
f09c1772 L |
224 | if ((this_operand >= 0 |
225 | && rreg != i.op[this_operand].regs) | |
226 | || base != intel_state.base | |
227 | || iindex != intel_state.index) | |
ee86248c JB |
228 | { |
229 | as_bad (_("invalid use of register")); | |
230 | return 0; | |
231 | } | |
232 | return 1; | |
233 | } | |
234 | ||
235 | static INLINE void i386_intel_fold (expressionS *e, symbolS *sym) | |
236 | { | |
27dee630 | 237 | expressionS *exp = symbol_get_value_expression (sym); |
ee86248c JB |
238 | if (S_GET_SEGMENT (sym) == absolute_section) |
239 | { | |
240 | offsetT val = e->X_add_number; | |
241 | ||
27dee630 | 242 | *e = *exp; |
ee86248c JB |
243 | e->X_add_number += val; |
244 | } | |
245 | else | |
246 | { | |
27dee630 L |
247 | if (exp->X_op == O_symbol |
248 | && strcmp (S_GET_NAME (exp->X_add_symbol), | |
249 | GLOBAL_OFFSET_TABLE_NAME) == 0) | |
250 | sym = exp->X_add_symbol; | |
ee86248c JB |
251 | e->X_add_symbol = sym; |
252 | e->X_op_symbol = NULL; | |
253 | e->X_op = O_symbol; | |
254 | } | |
255 | } | |
256 | ||
3c7b9c2c L |
257 | static int |
258 | i386_intel_simplify_register (expressionS *e) | |
259 | { | |
260 | int reg_num; | |
261 | ||
262 | if (this_operand < 0 || intel_state.in_offset) | |
263 | { | |
264 | as_bad (_("invalid use of register")); | |
265 | return 0; | |
266 | } | |
267 | ||
268 | if (e->X_op == O_register) | |
269 | reg_num = e->X_add_number; | |
270 | else | |
271 | reg_num = e->X_md - 1; | |
272 | ||
273 | if (!intel_state.in_bracket) | |
274 | { | |
275 | if (i.op[this_operand].regs) | |
276 | { | |
277 | as_bad (_("invalid use of register")); | |
278 | return 0; | |
279 | } | |
280 | if (i386_regtab[reg_num].reg_type.bitfield.sreg3 | |
281 | && i386_regtab[reg_num].reg_num == RegFlat) | |
282 | { | |
283 | as_bad (_("invalid use of pseudo-register")); | |
284 | return 0; | |
285 | } | |
286 | i.op[this_operand].regs = i386_regtab + reg_num; | |
287 | } | |
9e2934f7 | 288 | else if (!intel_state.index |
1b54b8d7 JB |
289 | && (i386_regtab[reg_num].reg_type.bitfield.xmmword |
290 | || i386_regtab[reg_num].reg_type.bitfield.ymmword | |
291 | || i386_regtab[reg_num].reg_type.bitfield.zmmword | |
1187cf29 JB |
292 | || i386_regtab[reg_num].reg_num == RegRiz |
293 | || i386_regtab[reg_num].reg_num == RegEiz)) | |
9e2934f7 | 294 | intel_state.index = i386_regtab + reg_num; |
3c7b9c2c L |
295 | else if (!intel_state.base && !intel_state.in_scale) |
296 | intel_state.base = i386_regtab + reg_num; | |
297 | else if (!intel_state.index) | |
9e2934f7 JB |
298 | { |
299 | if (intel_state.in_scale | |
47cd3fa7 JB |
300 | || current_templates->start->base_opcode == 0xf30f1b /* bndmk */ |
301 | || (current_templates->start->base_opcode & ~1) == 0x0f1a /* bnd{ld,st}x */ | |
9e2934f7 JB |
302 | || i386_regtab[reg_num].reg_type.bitfield.baseindex) |
303 | intel_state.index = i386_regtab + reg_num; | |
304 | else | |
305 | { | |
306 | /* Convert base to index and make ESP/RSP the base. */ | |
307 | intel_state.index = intel_state.base; | |
308 | intel_state.base = i386_regtab + reg_num; | |
309 | } | |
310 | } | |
3c7b9c2c L |
311 | else |
312 | { | |
313 | /* esp is invalid as index */ | |
8280f326 | 314 | intel_state.index = i386_regtab + REGNAM_EAX + ESP_REG_NUM; |
3c7b9c2c L |
315 | } |
316 | return 2; | |
317 | } | |
318 | ||
ee86248c JB |
319 | static int i386_intel_simplify (expressionS *); |
320 | ||
321 | static INLINE int i386_intel_simplify_symbol(symbolS *sym) | |
322 | { | |
323 | int ret = i386_intel_simplify (symbol_get_value_expression (sym)); | |
324 | ||
325 | if (ret == 2) | |
326 | { | |
327 | S_SET_SEGMENT(sym, absolute_section); | |
328 | ret = 1; | |
329 | } | |
330 | return ret; | |
331 | } | |
332 | ||
333 | static int i386_intel_simplify (expressionS *e) | |
334 | { | |
f09c1772 L |
335 | const reg_entry *the_reg = (this_operand >= 0 |
336 | ? i.op[this_operand].regs : NULL); | |
ee86248c | 337 | const reg_entry *base = intel_state.base; |
91d6fa6a | 338 | const reg_entry *state_index = intel_state.index; |
ee86248c JB |
339 | int ret; |
340 | ||
341 | if (!intel_syntax) | |
342 | return 1; | |
343 | ||
344 | switch (e->X_op) | |
345 | { | |
346 | case O_index: | |
347 | if (e->X_add_symbol) | |
348 | { | |
349 | if (!i386_intel_simplify_symbol (e->X_add_symbol) | |
f09c1772 L |
350 | || !i386_intel_check(the_reg, intel_state.base, |
351 | intel_state.index)) | |
5bb3703f | 352 | return 0; |
ee86248c JB |
353 | } |
354 | if (!intel_state.in_offset) | |
355 | ++intel_state.in_bracket; | |
356 | ret = i386_intel_simplify_symbol (e->X_op_symbol); | |
357 | if (!intel_state.in_offset) | |
358 | --intel_state.in_bracket; | |
359 | if (!ret) | |
360 | return 0; | |
361 | if (e->X_add_symbol) | |
362 | e->X_op = O_add; | |
363 | else | |
364 | i386_intel_fold (e, e->X_op_symbol); | |
365 | break; | |
366 | ||
367 | case O_offset: | |
6cee4cda | 368 | intel_state.has_offset = 1; |
ee86248c JB |
369 | ++intel_state.in_offset; |
370 | ret = i386_intel_simplify_symbol (e->X_add_symbol); | |
371 | --intel_state.in_offset; | |
91d6fa6a | 372 | if (!ret || !i386_intel_check(the_reg, base, state_index)) |
ee86248c JB |
373 | return 0; |
374 | i386_intel_fold (e, e->X_add_symbol); | |
375 | return ret; | |
376 | ||
377 | case O_byte_ptr: | |
378 | case O_word_ptr: | |
379 | case O_dword_ptr: | |
380 | case O_fword_ptr: | |
381 | case O_qword_ptr: | |
382 | case O_tbyte_ptr: | |
383 | case O_oword_ptr: | |
384 | case O_xmmword_ptr: | |
385 | case O_ymmword_ptr: | |
43234a1e | 386 | case O_zmmword_ptr: |
ee86248c JB |
387 | case O_near_ptr: |
388 | case O_far_ptr: | |
389 | if (intel_state.op_modifier == O_absent) | |
390 | intel_state.op_modifier = e->X_op; | |
391 | /* FALLTHROUGH */ | |
392 | case O_short: | |
f09c1772 L |
393 | if (symbol_get_value_expression (e->X_add_symbol)->X_op |
394 | == O_register) | |
ee86248c JB |
395 | { |
396 | as_bad (_("invalid use of register")); | |
397 | return 0; | |
398 | } | |
399 | if (!i386_intel_simplify_symbol (e->X_add_symbol)) | |
400 | return 0; | |
401 | i386_intel_fold (e, e->X_add_symbol); | |
402 | break; | |
403 | ||
404 | case O_full_ptr: | |
f09c1772 L |
405 | if (symbol_get_value_expression (e->X_op_symbol)->X_op |
406 | == O_register) | |
ee86248c JB |
407 | { |
408 | as_bad (_("invalid use of register")); | |
409 | return 0; | |
410 | } | |
411 | if (!i386_intel_simplify_symbol (e->X_op_symbol) | |
f09c1772 L |
412 | || !i386_intel_check(the_reg, intel_state.base, |
413 | intel_state.index)) | |
ee86248c JB |
414 | return 0; |
415 | if (!intel_state.in_offset) | |
fd4e0347 JB |
416 | { |
417 | if (!intel_state.seg) | |
418 | intel_state.seg = e->X_add_symbol; | |
419 | else | |
420 | { | |
421 | expressionS exp; | |
422 | ||
423 | exp.X_op = O_full_ptr; | |
424 | exp.X_add_symbol = e->X_add_symbol; | |
425 | exp.X_op_symbol = intel_state.seg; | |
426 | intel_state.seg = make_expr_symbol (&exp); | |
427 | } | |
428 | } | |
ee86248c JB |
429 | i386_intel_fold (e, e->X_op_symbol); |
430 | break; | |
431 | ||
ee86248c JB |
432 | case O_multiply: |
433 | if (this_operand >= 0 && intel_state.in_bracket) | |
434 | { | |
435 | expressionS *scale = NULL; | |
c2a5914e | 436 | int has_index = (intel_state.index != NULL); |
ee86248c JB |
437 | |
438 | if (!intel_state.in_scale++) | |
439 | intel_state.scale_factor = 1; | |
440 | ||
441 | ret = i386_intel_simplify_symbol (e->X_add_symbol); | |
c2a5914e | 442 | if (ret && !has_index && intel_state.index) |
ee86248c JB |
443 | scale = symbol_get_value_expression (e->X_op_symbol); |
444 | ||
445 | if (ret) | |
446 | ret = i386_intel_simplify_symbol (e->X_op_symbol); | |
c2a5914e | 447 | if (ret && !scale && !has_index && intel_state.index) |
ee86248c JB |
448 | scale = symbol_get_value_expression (e->X_add_symbol); |
449 | ||
c2a5914e | 450 | if (ret && scale) |
ee86248c JB |
451 | { |
452 | resolve_expression (scale); | |
453 | if (scale->X_op != O_constant | |
dc821c5f | 454 | || intel_state.index->reg_type.bitfield.word) |
ee86248c JB |
455 | scale->X_add_number = 0; |
456 | intel_state.scale_factor *= scale->X_add_number; | |
457 | } | |
458 | ||
459 | --intel_state.in_scale; | |
460 | if (!ret) | |
461 | return 0; | |
462 | ||
463 | if (!intel_state.in_scale) | |
464 | switch (intel_state.scale_factor) | |
465 | { | |
466 | case 1: | |
467 | i.log2_scale_factor = 0; | |
468 | break; | |
469 | case 2: | |
470 | i.log2_scale_factor = 1; | |
471 | break; | |
472 | case 4: | |
473 | i.log2_scale_factor = 2; | |
474 | break; | |
475 | case 8: | |
476 | i.log2_scale_factor = 3; | |
477 | break; | |
478 | default: | |
479 | /* esp is invalid as index */ | |
8280f326 | 480 | intel_state.index = i386_regtab + REGNAM_EAX + ESP_REG_NUM; |
ee86248c JB |
481 | break; |
482 | } | |
483 | ||
484 | break; | |
485 | } | |
92b4f90c | 486 | goto fallthrough; |
3c7b9c2c L |
487 | |
488 | case O_register: | |
489 | ret = i386_intel_simplify_register (e); | |
490 | if (ret == 2) | |
491 | { | |
492 | gas_assert (e->X_add_number < (unsigned short) -1); | |
493 | e->X_md = (unsigned short) e->X_add_number + 1; | |
494 | e->X_op = O_constant; | |
495 | e->X_add_number = 0; | |
496 | } | |
497 | return ret; | |
498 | ||
499 | case O_constant: | |
500 | if (e->X_md) | |
501 | return i386_intel_simplify_register (e); | |
502 | ||
ee86248c JB |
503 | /* FALLTHROUGH */ |
504 | default: | |
92b4f90c | 505 | fallthrough: |
f09c1772 L |
506 | if (e->X_add_symbol |
507 | && !i386_intel_simplify_symbol (e->X_add_symbol)) | |
ee86248c JB |
508 | return 0; |
509 | if (e->X_op == O_add || e->X_op == O_subtract) | |
510 | { | |
511 | base = intel_state.base; | |
91d6fa6a | 512 | state_index = intel_state.index; |
ee86248c | 513 | } |
91d6fa6a | 514 | if (!i386_intel_check (the_reg, base, state_index) |
f09c1772 L |
515 | || (e->X_op_symbol |
516 | && !i386_intel_simplify_symbol (e->X_op_symbol)) | |
91d6fa6a | 517 | || !i386_intel_check (the_reg, |
f09c1772 L |
518 | (e->X_op != O_add |
519 | ? base : intel_state.base), | |
520 | (e->X_op != O_add | |
521 | ? state_index : intel_state.index))) | |
ee86248c JB |
522 | return 0; |
523 | break; | |
524 | } | |
525 | ||
f09c1772 L |
526 | if (this_operand >= 0 |
527 | && e->X_op == O_symbol | |
528 | && !intel_state.in_offset) | |
ee86248c JB |
529 | { |
530 | segT seg = S_GET_SEGMENT (e->X_add_symbol); | |
531 | ||
532 | if (seg != absolute_section | |
533 | && seg != reg_section | |
534 | && seg != expr_section) | |
535 | intel_state.is_mem |= 2 - !intel_state.in_bracket; | |
536 | } | |
537 | ||
538 | return 1; | |
539 | } | |
540 | ||
541 | int i386_need_index_operator (void) | |
542 | { | |
543 | return intel_syntax < 0; | |
544 | } | |
545 | ||
546 | static int | |
547 | i386_intel_operand (char *operand_string, int got_a_float) | |
548 | { | |
549 | char *saved_input_line_pointer, *buf; | |
550 | segT exp_seg; | |
551 | expressionS exp, *expP; | |
552 | char suffix = 0; | |
553 | int ret; | |
554 | ||
43234a1e L |
555 | /* Handle vector immediates. */ |
556 | if (RC_SAE_immediate (operand_string)) | |
557 | return 1; | |
558 | ||
ee86248c JB |
559 | /* Initialize state structure. */ |
560 | intel_state.op_modifier = O_absent; | |
561 | intel_state.is_mem = 0; | |
25303607 | 562 | intel_state.is_indirect = 0; |
1acf546e | 563 | intel_state.has_offset = 0; |
ee86248c JB |
564 | intel_state.base = NULL; |
565 | intel_state.index = NULL; | |
566 | intel_state.seg = NULL; | |
567 | operand_type_set (&intel_state.reloc_types, ~0); | |
9c2799c2 NC |
568 | gas_assert (!intel_state.in_offset); |
569 | gas_assert (!intel_state.in_bracket); | |
570 | gas_assert (!intel_state.in_scale); | |
ee86248c JB |
571 | |
572 | saved_input_line_pointer = input_line_pointer; | |
573 | input_line_pointer = buf = xstrdup (operand_string); | |
574 | ||
575 | intel_syntax = -1; | |
576 | memset (&exp, 0, sizeof(exp)); | |
577 | exp_seg = expression (&exp); | |
578 | ret = i386_intel_simplify (&exp); | |
579 | intel_syntax = 1; | |
580 | ||
581 | SKIP_WHITESPACE (); | |
43234a1e L |
582 | |
583 | /* Handle vector operations. */ | |
584 | if (*input_line_pointer == '{') | |
585 | { | |
586 | char *end = check_VecOperations (input_line_pointer, NULL); | |
587 | if (end) | |
588 | input_line_pointer = end; | |
589 | else | |
590 | ret = 0; | |
591 | } | |
592 | ||
ee86248c JB |
593 | if (!is_end_of_line[(unsigned char) *input_line_pointer]) |
594 | { | |
38bf5113 JB |
595 | if (ret) |
596 | as_bad (_("junk `%s' after expression"), input_line_pointer); | |
ee86248c JB |
597 | ret = 0; |
598 | } | |
599 | else if (exp.X_op == O_illegal || exp.X_op == O_absent) | |
600 | { | |
38bf5113 JB |
601 | if (ret) |
602 | as_bad (_("invalid expression")); | |
ee86248c JB |
603 | ret = 0; |
604 | } | |
6cee4cda L |
605 | else if (!intel_state.has_offset |
606 | && input_line_pointer > buf | |
607 | && *(input_line_pointer - 1) == ']') | |
25303607 L |
608 | { |
609 | intel_state.is_mem |= 1; | |
610 | intel_state.is_indirect = 1; | |
611 | } | |
ee86248c JB |
612 | |
613 | input_line_pointer = saved_input_line_pointer; | |
614 | free (buf); | |
615 | ||
9c2799c2 NC |
616 | gas_assert (!intel_state.in_offset); |
617 | gas_assert (!intel_state.in_bracket); | |
618 | gas_assert (!intel_state.in_scale); | |
ee86248c JB |
619 | |
620 | if (!ret) | |
621 | return 0; | |
622 | ||
623 | if (intel_state.op_modifier != O_absent | |
624 | && current_templates->start->base_opcode != 0x8d /* lea */) | |
625 | { | |
626 | i.types[this_operand].bitfield.unspecified = 0; | |
627 | ||
628 | switch (intel_state.op_modifier) | |
629 | { | |
630 | case O_byte_ptr: | |
631 | i.types[this_operand].bitfield.byte = 1; | |
632 | suffix = BYTE_MNEM_SUFFIX; | |
633 | break; | |
634 | ||
635 | case O_word_ptr: | |
636 | i.types[this_operand].bitfield.word = 1; | |
637 | if ((current_templates->start->name[0] == 'l' | |
638 | && current_templates->start->name[2] == 's' | |
639 | && current_templates->start->name[3] == 0) | |
640 | || current_templates->start->base_opcode == 0x62 /* bound */) | |
641 | suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */ | |
642 | else if (got_a_float == 2) /* "fi..." */ | |
643 | suffix = SHORT_MNEM_SUFFIX; | |
644 | else | |
645 | suffix = WORD_MNEM_SUFFIX; | |
646 | break; | |
647 | ||
648 | case O_dword_ptr: | |
649 | i.types[this_operand].bitfield.dword = 1; | |
650 | if ((current_templates->start->name[0] == 'l' | |
651 | && current_templates->start->name[2] == 's' | |
652 | && current_templates->start->name[3] == 0) | |
653 | || current_templates->start->base_opcode == 0x62 /* bound */) | |
654 | suffix = WORD_MNEM_SUFFIX; | |
655 | else if (flag_code == CODE_16BIT | |
656 | && (current_templates->start->opcode_modifier.jump | |
657 | || current_templates->start->opcode_modifier.jumpdword)) | |
658 | suffix = LONG_DOUBLE_MNEM_SUFFIX; | |
659 | else if (got_a_float == 1) /* "f..." */ | |
660 | suffix = SHORT_MNEM_SUFFIX; | |
661 | else | |
662 | suffix = LONG_MNEM_SUFFIX; | |
663 | break; | |
664 | ||
665 | case O_fword_ptr: | |
666 | i.types[this_operand].bitfield.fword = 1; | |
667 | if (current_templates->start->name[0] == 'l' | |
668 | && current_templates->start->name[2] == 's' | |
669 | && current_templates->start->name[3] == 0) | |
670 | suffix = LONG_MNEM_SUFFIX; | |
671 | else if (!got_a_float) | |
672 | { | |
673 | if (flag_code == CODE_16BIT) | |
674 | add_prefix (DATA_PREFIX_OPCODE); | |
675 | suffix = LONG_DOUBLE_MNEM_SUFFIX; | |
676 | } | |
677 | else | |
678 | suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */ | |
679 | break; | |
680 | ||
681 | case O_qword_ptr: | |
682 | i.types[this_operand].bitfield.qword = 1; | |
683 | if (current_templates->start->base_opcode == 0x62 /* bound */ | |
684 | || got_a_float == 1) /* "f..." */ | |
685 | suffix = LONG_MNEM_SUFFIX; | |
686 | else | |
687 | suffix = QWORD_MNEM_SUFFIX; | |
688 | break; | |
689 | ||
690 | case O_tbyte_ptr: | |
691 | i.types[this_operand].bitfield.tbyte = 1; | |
692 | if (got_a_float == 1) | |
693 | suffix = LONG_DOUBLE_MNEM_SUFFIX; | |
694 | else | |
695 | suffix = BYTE_MNEM_SUFFIX; /* so it will cause an error */ | |
696 | break; | |
697 | ||
698 | case O_oword_ptr: | |
699 | case O_xmmword_ptr: | |
700 | i.types[this_operand].bitfield.xmmword = 1; | |
ee86248c JB |
701 | break; |
702 | ||
703 | case O_ymmword_ptr: | |
704 | i.types[this_operand].bitfield.ymmword = 1; | |
ee86248c JB |
705 | break; |
706 | ||
43234a1e L |
707 | case O_zmmword_ptr: |
708 | i.types[this_operand].bitfield.zmmword = 1; | |
43234a1e L |
709 | break; |
710 | ||
ee86248c JB |
711 | case O_far_ptr: |
712 | suffix = LONG_DOUBLE_MNEM_SUFFIX; | |
713 | /* FALLTHROUGH */ | |
714 | case O_near_ptr: | |
715 | if (!current_templates->start->opcode_modifier.jump | |
716 | && !current_templates->start->opcode_modifier.jumpdword) | |
717 | suffix = got_a_float /* so it will cause an error */ | |
718 | ? BYTE_MNEM_SUFFIX | |
719 | : LONG_DOUBLE_MNEM_SUFFIX; | |
720 | break; | |
721 | ||
722 | default: | |
723 | BAD_CASE (intel_state.op_modifier); | |
724 | break; | |
725 | } | |
726 | ||
727 | if (!i.suffix) | |
728 | i.suffix = suffix; | |
729 | else if (i.suffix != suffix) | |
730 | { | |
731 | as_bad (_("conflicting operand size modifiers")); | |
732 | return 0; | |
733 | } | |
734 | } | |
735 | ||
736 | /* Operands for jump/call need special consideration. */ | |
737 | if (current_templates->start->opcode_modifier.jump | |
738 | || current_templates->start->opcode_modifier.jumpdword | |
739 | || current_templates->start->opcode_modifier.jumpintersegment) | |
740 | { | |
f09c1772 L |
741 | if (i.op[this_operand].regs |
742 | || intel_state.base | |
743 | || intel_state.index | |
ee86248c JB |
744 | || intel_state.is_mem > 1) |
745 | i.types[this_operand].bitfield.jumpabsolute = 1; | |
746 | else | |
747 | switch (intel_state.op_modifier) | |
748 | { | |
749 | case O_near_ptr: | |
750 | if (intel_state.seg) | |
751 | i.types[this_operand].bitfield.jumpabsolute = 1; | |
752 | else | |
753 | intel_state.is_mem = 1; | |
754 | break; | |
755 | case O_far_ptr: | |
756 | case O_absent: | |
757 | if (!intel_state.seg) | |
758 | { | |
759 | intel_state.is_mem = 1; | |
760 | if (intel_state.op_modifier == O_absent) | |
25303607 L |
761 | { |
762 | if (intel_state.is_indirect == 1) | |
763 | i.types[this_operand].bitfield.jumpabsolute = 1; | |
764 | break; | |
765 | } | |
ee86248c JB |
766 | as_bad (_("cannot infer the segment part of the operand")); |
767 | return 0; | |
768 | } | |
769 | else if (S_GET_SEGMENT (intel_state.seg) == reg_section) | |
770 | i.types[this_operand].bitfield.jumpabsolute = 1; | |
771 | else | |
772 | { | |
773 | i386_operand_type types; | |
774 | ||
775 | if (i.imm_operands >= MAX_IMMEDIATE_OPERANDS) | |
776 | { | |
777 | as_bad (_("at most %d immediate operands are allowed"), | |
778 | MAX_IMMEDIATE_OPERANDS); | |
779 | return 0; | |
780 | } | |
781 | expP = &im_expressions[i.imm_operands++]; | |
782 | memset (expP, 0, sizeof(*expP)); | |
783 | expP->X_op = O_symbol; | |
784 | expP->X_add_symbol = intel_state.seg; | |
785 | i.op[this_operand].imms = expP; | |
786 | ||
787 | resolve_expression (expP); | |
788 | operand_type_set (&types, ~0); | |
789 | if (!i386_finalize_immediate (S_GET_SEGMENT (intel_state.seg), | |
790 | expP, types, operand_string)) | |
791 | return 0; | |
792 | if (i.operands < MAX_OPERANDS) | |
793 | { | |
794 | this_operand = i.operands++; | |
795 | i.types[this_operand].bitfield.unspecified = 1; | |
796 | } | |
797 | if (suffix == LONG_DOUBLE_MNEM_SUFFIX) | |
798 | i.suffix = 0; | |
799 | intel_state.seg = NULL; | |
800 | intel_state.is_mem = 0; | |
801 | } | |
802 | break; | |
803 | default: | |
804 | i.types[this_operand].bitfield.jumpabsolute = 1; | |
805 | break; | |
806 | } | |
807 | if (i.types[this_operand].bitfield.jumpabsolute) | |
808 | intel_state.is_mem |= 1; | |
809 | } | |
810 | else if (intel_state.seg) | |
811 | intel_state.is_mem |= 1; | |
812 | ||
813 | if (i.op[this_operand].regs) | |
814 | { | |
815 | i386_operand_type temp; | |
816 | ||
817 | /* Register operand. */ | |
818 | if (intel_state.base || intel_state.index || intel_state.seg) | |
819 | { | |
820 | as_bad (_("invalid operand")); | |
821 | return 0; | |
822 | } | |
823 | ||
824 | temp = i.op[this_operand].regs->reg_type; | |
825 | temp.bitfield.baseindex = 0; | |
f09c1772 L |
826 | i.types[this_operand] = operand_type_or (i.types[this_operand], |
827 | temp); | |
ee86248c JB |
828 | i.types[this_operand].bitfield.unspecified = 0; |
829 | ++i.reg_operands; | |
830 | } | |
f09c1772 L |
831 | else if (intel_state.base |
832 | || intel_state.index | |
833 | || intel_state.seg | |
ee86248c JB |
834 | || intel_state.is_mem) |
835 | { | |
836 | /* Memory operand. */ | |
8325cc63 JB |
837 | if (i.mem_operands == 1 && !maybe_adjust_templates ()) |
838 | return 0; | |
faf786e6 | 839 | if ((int) i.mem_operands |
ee86248c JB |
840 | >= 2 - !current_templates->start->opcode_modifier.isstring) |
841 | { | |
313c53d1 L |
842 | /* Handle |
843 | ||
844 | call 0x9090,0x90909090 | |
845 | lcall 0x9090,0x90909090 | |
846 | jmp 0x9090,0x90909090 | |
847 | ljmp 0x9090,0x90909090 | |
848 | */ | |
849 | ||
850 | if ((current_templates->start->opcode_modifier.jumpintersegment | |
851 | || current_templates->start->opcode_modifier.jumpdword | |
852 | || current_templates->start->opcode_modifier.jump) | |
853 | && this_operand == 1 | |
854 | && intel_state.seg == NULL | |
855 | && i.mem_operands == 1 | |
856 | && i.disp_operands == 1 | |
857 | && intel_state.op_modifier == O_absent) | |
858 | { | |
859 | /* Try to process the first operand as immediate, */ | |
860 | this_operand = 0; | |
861 | if (i386_finalize_immediate (exp_seg, i.op[0].imms, | |
862 | intel_state.reloc_types, | |
863 | NULL)) | |
864 | { | |
865 | this_operand = 1; | |
866 | expP = &im_expressions[0]; | |
867 | i.op[this_operand].imms = expP; | |
868 | *expP = exp; | |
869 | ||
870 | /* Try to process the second operand as immediate, */ | |
871 | if (i386_finalize_immediate (exp_seg, expP, | |
872 | intel_state.reloc_types, | |
873 | NULL)) | |
874 | { | |
875 | i.mem_operands = 0; | |
876 | i.disp_operands = 0; | |
877 | i.imm_operands = 2; | |
878 | i.types[0].bitfield.mem = 0; | |
879 | i.types[0].bitfield.disp16 = 0; | |
880 | i.types[0].bitfield.disp32 = 0; | |
881 | i.types[0].bitfield.disp32s = 0; | |
882 | return 1; | |
883 | } | |
884 | } | |
885 | } | |
886 | ||
ee86248c JB |
887 | as_bad (_("too many memory references for `%s'"), |
888 | current_templates->start->name); | |
889 | return 0; | |
890 | } | |
891 | ||
2abc2bec JB |
892 | /* Swap base and index in 16-bit memory operands like |
893 | [si+bx]. Since i386_index_check is also used in AT&T | |
894 | mode we have to do this here. */ | |
895 | if (intel_state.base | |
896 | && intel_state.index | |
dc821c5f JB |
897 | && intel_state.base->reg_type.bitfield.word |
898 | && intel_state.index->reg_type.bitfield.word | |
2abc2bec JB |
899 | && intel_state.base->reg_num >= 6 |
900 | && intel_state.index->reg_num < 6) | |
901 | { | |
902 | i.base_reg = intel_state.index; | |
903 | i.index_reg = intel_state.base; | |
904 | } | |
905 | else | |
906 | { | |
907 | i.base_reg = intel_state.base; | |
908 | i.index_reg = intel_state.index; | |
909 | } | |
910 | ||
911 | if (i.base_reg || i.index_reg) | |
912 | i.types[this_operand].bitfield.baseindex = 1; | |
913 | ||
ee86248c JB |
914 | expP = &disp_expressions[i.disp_operands]; |
915 | memcpy (expP, &exp, sizeof(exp)); | |
916 | resolve_expression (expP); | |
917 | ||
f09c1772 L |
918 | if (expP->X_op != O_constant |
919 | || expP->X_add_number | |
2abc2bec | 920 | || !i.types[this_operand].bitfield.baseindex) |
ee86248c JB |
921 | { |
922 | i.op[this_operand].disps = expP; | |
923 | i.disp_operands++; | |
924 | ||
2abc2bec JB |
925 | i386_addressing_mode (); |
926 | ||
ee86248c JB |
927 | if (flag_code == CODE_64BIT) |
928 | { | |
929 | i.types[this_operand].bitfield.disp32 = 1; | |
930 | if (!i.prefix[ADDR_PREFIX]) | |
931 | { | |
932 | i.types[this_operand].bitfield.disp64 = 1; | |
933 | i.types[this_operand].bitfield.disp32s = 1; | |
934 | } | |
935 | } | |
936 | else if (!i.prefix[ADDR_PREFIX] ^ (flag_code == CODE_16BIT)) | |
937 | i.types[this_operand].bitfield.disp32 = 1; | |
938 | else | |
939 | i.types[this_operand].bitfield.disp16 = 1; | |
940 | ||
941 | #if defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT) | |
942 | /* | |
943 | * exp_seg is used only for verification in | |
944 | * i386_finalize_displacement, and we can end up seeing reg_section | |
945 | * here - but we know we removed all registers from the expression | |
946 | * (or error-ed on any remaining ones) in i386_intel_simplify. I | |
947 | * consider the check in i386_finalize_displacement bogus anyway, in | |
948 | * particular because it doesn't allow for expr_section, so I'd | |
949 | * rather see that check (and the similar one in | |
950 | * i386_finalize_immediate) use SEG_NORMAL(), but not being an a.out | |
951 | * expert I can't really say whether that would have other bad side | |
952 | * effects. | |
953 | */ | |
954 | if (OUTPUT_FLAVOR == bfd_target_aout_flavour | |
955 | && exp_seg == reg_section) | |
956 | exp_seg = expP->X_op != O_constant ? undefined_section | |
957 | : absolute_section; | |
958 | #endif | |
959 | ||
960 | if (!i386_finalize_displacement (exp_seg, expP, | |
961 | intel_state.reloc_types, | |
962 | operand_string)) | |
963 | return 0; | |
964 | } | |
965 | ||
ee86248c JB |
966 | if (intel_state.seg) |
967 | { | |
fd4e0347 | 968 | for (ret = check_none; ; ret = operand_check) |
e21440ba JB |
969 | { |
970 | expP = symbol_get_value_expression (intel_state.seg); | |
fd4e0347 JB |
971 | if (expP->X_op != O_full_ptr |
972 | || symbol_get_value_expression (expP->X_op_symbol)->X_op | |
973 | != O_register) | |
e21440ba JB |
974 | break; |
975 | intel_state.seg = expP->X_add_symbol; | |
976 | } | |
0398aac5 | 977 | if (expP->X_op != O_register) |
ee86248c JB |
978 | { |
979 | as_bad (_("segment register name expected")); | |
980 | return 0; | |
981 | } | |
982 | if (!i386_regtab[expP->X_add_number].reg_type.bitfield.sreg2 | |
983 | && !i386_regtab[expP->X_add_number].reg_type.bitfield.sreg3) | |
984 | { | |
985 | as_bad (_("invalid use of register")); | |
986 | return 0; | |
987 | } | |
fd4e0347 JB |
988 | switch (ret) |
989 | { | |
990 | case check_error: | |
991 | as_bad (_("redundant segment overrides")); | |
992 | return 0; | |
993 | case check_warning: | |
994 | as_warn (_("redundant segment overrides")); | |
995 | break; | |
996 | } | |
ee86248c JB |
997 | switch (i386_regtab[expP->X_add_number].reg_num) |
998 | { | |
999 | case 0: i.seg[i.mem_operands] = &es; break; | |
1000 | case 1: i.seg[i.mem_operands] = &cs; break; | |
1001 | case 2: i.seg[i.mem_operands] = &ss; break; | |
1002 | case 3: i.seg[i.mem_operands] = &ds; break; | |
1003 | case 4: i.seg[i.mem_operands] = &fs; break; | |
1004 | case 5: i.seg[i.mem_operands] = &gs; break; | |
1005 | case RegFlat: i.seg[i.mem_operands] = NULL; break; | |
1006 | } | |
1007 | } | |
1008 | ||
ee86248c JB |
1009 | if (!i386_index_check (operand_string)) |
1010 | return 0; | |
1011 | ||
1012 | i.types[this_operand].bitfield.mem = 1; | |
8325cc63 JB |
1013 | if (i.mem_operands == 0) |
1014 | i.memop1_string = xstrdup (operand_string); | |
ee86248c JB |
1015 | ++i.mem_operands; |
1016 | } | |
1017 | else | |
1018 | { | |
1019 | /* Immediate. */ | |
1020 | if (i.imm_operands >= MAX_IMMEDIATE_OPERANDS) | |
1021 | { | |
1022 | as_bad (_("at most %d immediate operands are allowed"), | |
1023 | MAX_IMMEDIATE_OPERANDS); | |
1024 | return 0; | |
1025 | } | |
1026 | ||
1027 | expP = &im_expressions[i.imm_operands++]; | |
1028 | i.op[this_operand].imms = expP; | |
1029 | *expP = exp; | |
1030 | ||
1031 | return i386_finalize_immediate (exp_seg, expP, intel_state.reloc_types, | |
1032 | operand_string); | |
1033 | } | |
1034 | ||
1035 | return 1; | |
1036 | } |