1 /* tc-i386.c -- Assemble Intel syntax code for ix86/x86-64
2 Copyright (C) 2009-2015 Free Software Foundation, Inc.
4 This file is part of GAS, the GNU Assembler.
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)
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.
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
23 operatorT op_modifier
; /* Operand modifier. */
24 int is_mem
; /* 1 if operand is memory reference. */
25 int is_indirect
; /* 1 if operand is indirect reference. */
26 int has_offset
; /* 1 if operand has offset. */
27 unsigned int in_offset
; /* >=1 if processing operand of offset. */
28 unsigned int in_bracket
; /* >=1 if processing operand in brackets. */
29 unsigned int in_scale
; /* >=1 if processing multipication operand
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. */
39 /* offset X_add_symbol */
40 #define O_offset O_md32
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
47 /* byte ptr X_add_symbol */
48 #define O_byte_ptr O_md28
49 /* word ptr X_add_symbol */
50 #define O_word_ptr O_md27
51 /* dword ptr X_add_symbol */
52 #define O_dword_ptr O_md26
53 /* qword ptr X_add_symbol */
54 #define O_qword_ptr O_md25
55 /* oword ptr X_add_symbol */
56 #define O_oword_ptr O_md24
57 /* fword ptr X_add_symbol */
58 #define O_fword_ptr O_md23
59 /* tbyte ptr X_add_symbol */
60 #define O_tbyte_ptr O_md22
61 /* xmmword ptr X_add_symbol */
62 #define O_xmmword_ptr O_md21
63 /* ymmword ptr X_add_symbol */
64 #define O_ymmword_ptr O_md20
65 /* zmmword ptr X_add_symbol */
66 #define O_zmmword_ptr O_md19
72 unsigned int operands
;
74 const i386_operators
[] =
76 { "and", O_bit_and
, 2 },
82 { "mod", O_modulus
, 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 }
102 #define I386_TYPE(t, n) { #t, O_##t##_ptr, { n, n, n } }
108 I386_TYPE(tbyte
, 10),
109 I386_TYPE(oword
, 16),
110 I386_TYPE(xmmword
, 16),
111 I386_TYPE(ymmword
, 32),
112 I386_TYPE(zmmword
, 64),
114 { "near", O_near_ptr
, { 0xff04, 0xff02, 0xff08 } },
115 { "far", O_far_ptr
, { 0xff06, 0xff05, 0xff06 } },
116 { NULL
, O_illegal
, { 0, 0, 0 } }
119 operatorT
i386_operator (const char *name
, unsigned int operands
, char *pc
)
130 switch (*input_line_pointer
)
133 ++input_line_pointer
;
136 ++input_line_pointer
;
139 if (this_operand
>= 0 && i
.reloc
[this_operand
] == NO_RELOC
)
142 char *gotfree_input_line
= lex_got (&i
.reloc
[this_operand
],
144 &intel_state
.reloc_types
);
146 if (!gotfree_input_line
)
148 free (gotfree_input_line
);
149 *input_line_pointer
++ = '+';
150 memset (input_line_pointer
, '0', adjust
- 1);
151 input_line_pointer
[adjust
- 1] = ' ';
159 for (j
= 0; i386_operators
[j
].name
; ++j
)
160 if (strcasecmp (i386_operators
[j
].name
, name
) == 0)
162 if (i386_operators
[j
].operands
163 && i386_operators
[j
].operands
!= operands
)
165 return i386_operators
[j
].op
;
168 for (j
= 0; i386_types
[j
].name
; ++j
)
169 if (strcasecmp (i386_types
[j
].name
, name
) == 0)
171 if (i386_types
[j
].name
&& *pc
== ' ')
173 char *pname
= ++input_line_pointer
;
174 char c
= get_symbol_end ();
176 if (strcasecmp (pname
, "ptr") == 0)
180 if (intel_syntax
> 0 || operands
!= 1)
182 return i386_types
[j
].op
;
185 *input_line_pointer
= c
;
186 input_line_pointer
= pname
- 1;
192 static int i386_intel_parse_name (const char *name
, expressionS
*e
)
196 if (! strcmp (name
, "$"))
198 current_location (e
);
202 for (j
= 0; i386_types
[j
].name
; ++j
)
203 if (strcasecmp(i386_types
[j
].name
, name
) == 0)
205 e
->X_op
= O_constant
;
206 e
->X_add_number
= i386_types
[j
].sz
[flag_code
];
207 e
->X_add_symbol
= NULL
;
208 e
->X_op_symbol
= NULL
;
215 static INLINE
int i386_intel_check (const reg_entry
*rreg
,
216 const reg_entry
*base
,
217 const reg_entry
*iindex
)
219 if ((this_operand
>= 0
220 && rreg
!= i
.op
[this_operand
].regs
)
221 || base
!= intel_state
.base
222 || iindex
!= intel_state
.index
)
224 as_bad (_("invalid use of register"));
230 static INLINE
void i386_intel_fold (expressionS
*e
, symbolS
*sym
)
232 expressionS
*exp
= symbol_get_value_expression (sym
);
233 if (S_GET_SEGMENT (sym
) == absolute_section
)
235 offsetT val
= e
->X_add_number
;
238 e
->X_add_number
+= val
;
242 if (exp
->X_op
== O_symbol
243 && strcmp (S_GET_NAME (exp
->X_add_symbol
),
244 GLOBAL_OFFSET_TABLE_NAME
) == 0)
245 sym
= exp
->X_add_symbol
;
246 e
->X_add_symbol
= sym
;
247 e
->X_op_symbol
= NULL
;
253 i386_intel_simplify_register (expressionS
*e
)
257 if (this_operand
< 0 || intel_state
.in_offset
)
259 as_bad (_("invalid use of register"));
263 if (e
->X_op
== O_register
)
264 reg_num
= e
->X_add_number
;
266 reg_num
= e
->X_md
- 1;
268 if (!intel_state
.in_bracket
)
270 if (i
.op
[this_operand
].regs
)
272 as_bad (_("invalid use of register"));
275 if (i386_regtab
[reg_num
].reg_type
.bitfield
.sreg3
276 && i386_regtab
[reg_num
].reg_num
== RegFlat
)
278 as_bad (_("invalid use of pseudo-register"));
281 i
.op
[this_operand
].regs
= i386_regtab
+ reg_num
;
283 else if (!intel_state
.index
284 && (i386_regtab
[reg_num
].reg_type
.bitfield
.regxmm
285 || i386_regtab
[reg_num
].reg_type
.bitfield
.regymm
286 || i386_regtab
[reg_num
].reg_type
.bitfield
.regzmm
))
287 intel_state
.index
= i386_regtab
+ reg_num
;
288 else if (!intel_state
.base
&& !intel_state
.in_scale
)
289 intel_state
.base
= i386_regtab
+ reg_num
;
290 else if (!intel_state
.index
)
292 if (intel_state
.in_scale
293 || current_templates
->start
->base_opcode
== 0xf30f1b /* bndmk */
294 || (current_templates
->start
->base_opcode
& ~1) == 0x0f1a /* bnd{ld,st}x */
295 || i386_regtab
[reg_num
].reg_type
.bitfield
.baseindex
)
296 intel_state
.index
= i386_regtab
+ reg_num
;
299 /* Convert base to index and make ESP/RSP the base. */
300 intel_state
.index
= intel_state
.base
;
301 intel_state
.base
= i386_regtab
+ reg_num
;
306 /* esp is invalid as index */
307 intel_state
.index
= i386_regtab
+ REGNAM_EAX
+ ESP_REG_NUM
;
312 static int i386_intel_simplify (expressionS
*);
314 static INLINE
int i386_intel_simplify_symbol(symbolS
*sym
)
316 int ret
= i386_intel_simplify (symbol_get_value_expression (sym
));
320 S_SET_SEGMENT(sym
, absolute_section
);
326 static int i386_intel_simplify (expressionS
*e
)
328 const reg_entry
*the_reg
= (this_operand
>= 0
329 ? i
.op
[this_operand
].regs
: NULL
);
330 const reg_entry
*base
= intel_state
.base
;
331 const reg_entry
*state_index
= intel_state
.index
;
342 if (!i386_intel_simplify_symbol (e
->X_add_symbol
)
343 || !i386_intel_check(the_reg
, intel_state
.base
,
347 if (!intel_state
.in_offset
)
348 ++intel_state
.in_bracket
;
349 ret
= i386_intel_simplify_symbol (e
->X_op_symbol
);
350 if (!intel_state
.in_offset
)
351 --intel_state
.in_bracket
;
357 i386_intel_fold (e
, e
->X_op_symbol
);
361 intel_state
.has_offset
= 1;
362 ++intel_state
.in_offset
;
363 ret
= i386_intel_simplify_symbol (e
->X_add_symbol
);
364 --intel_state
.in_offset
;
365 if (!ret
|| !i386_intel_check(the_reg
, base
, state_index
))
367 i386_intel_fold (e
, e
->X_add_symbol
);
382 if (intel_state
.op_modifier
== O_absent
)
383 intel_state
.op_modifier
= e
->X_op
;
386 if (symbol_get_value_expression (e
->X_add_symbol
)->X_op
389 as_bad (_("invalid use of register"));
392 if (!i386_intel_simplify_symbol (e
->X_add_symbol
))
394 i386_intel_fold (e
, e
->X_add_symbol
);
398 if (symbol_get_value_expression (e
->X_op_symbol
)->X_op
401 as_bad (_("invalid use of register"));
404 if (!i386_intel_simplify_symbol (e
->X_op_symbol
)
405 || !i386_intel_check(the_reg
, intel_state
.base
,
408 if (!intel_state
.in_offset
)
409 intel_state
.seg
= e
->X_add_symbol
;
410 i386_intel_fold (e
, e
->X_op_symbol
);
414 if (this_operand
>= 0 && intel_state
.in_bracket
)
416 expressionS
*scale
= NULL
;
417 int has_index
= (intel_state
.index
!= NULL
);
419 if (!intel_state
.in_scale
++)
420 intel_state
.scale_factor
= 1;
422 ret
= i386_intel_simplify_symbol (e
->X_add_symbol
);
423 if (ret
&& !has_index
&& intel_state
.index
)
424 scale
= symbol_get_value_expression (e
->X_op_symbol
);
427 ret
= i386_intel_simplify_symbol (e
->X_op_symbol
);
428 if (ret
&& !scale
&& !has_index
&& intel_state
.index
)
429 scale
= symbol_get_value_expression (e
->X_add_symbol
);
433 resolve_expression (scale
);
434 if (scale
->X_op
!= O_constant
435 || intel_state
.index
->reg_type
.bitfield
.reg16
)
436 scale
->X_add_number
= 0;
437 intel_state
.scale_factor
*= scale
->X_add_number
;
440 --intel_state
.in_scale
;
444 if (!intel_state
.in_scale
)
445 switch (intel_state
.scale_factor
)
448 i
.log2_scale_factor
= 0;
451 i
.log2_scale_factor
= 1;
454 i
.log2_scale_factor
= 2;
457 i
.log2_scale_factor
= 3;
460 /* esp is invalid as index */
461 intel_state
.index
= i386_regtab
+ REGNAM_EAX
+ ESP_REG_NUM
;
470 ret
= i386_intel_simplify_register (e
);
473 gas_assert (e
->X_add_number
< (unsigned short) -1);
474 e
->X_md
= (unsigned short) e
->X_add_number
+ 1;
475 e
->X_op
= O_constant
;
482 return i386_intel_simplify_register (e
);
488 && !i386_intel_simplify_symbol (e
->X_add_symbol
))
490 if (e
->X_op
== O_add
|| e
->X_op
== O_subtract
)
492 base
= intel_state
.base
;
493 state_index
= intel_state
.index
;
495 if (!i386_intel_check (the_reg
, base
, state_index
)
497 && !i386_intel_simplify_symbol (e
->X_op_symbol
))
498 || !i386_intel_check (the_reg
,
500 ? base
: intel_state
.base
),
502 ? state_index
: intel_state
.index
)))
507 if (this_operand
>= 0
508 && e
->X_op
== O_symbol
509 && !intel_state
.in_offset
)
511 segT seg
= S_GET_SEGMENT (e
->X_add_symbol
);
513 if (seg
!= absolute_section
514 && seg
!= reg_section
515 && seg
!= expr_section
)
516 intel_state
.is_mem
|= 2 - !intel_state
.in_bracket
;
522 int i386_need_index_operator (void)
524 return intel_syntax
< 0;
528 i386_intel_operand (char *operand_string
, int got_a_float
)
530 char *saved_input_line_pointer
, *buf
;
532 expressionS exp
, *expP
;
536 /* Handle vector immediates. */
537 if (RC_SAE_immediate (operand_string
))
540 /* Initialize state structure. */
541 intel_state
.op_modifier
= O_absent
;
542 intel_state
.is_mem
= 0;
543 intel_state
.is_indirect
= 0;
544 intel_state
.has_offset
= 0;
545 intel_state
.base
= NULL
;
546 intel_state
.index
= NULL
;
547 intel_state
.seg
= NULL
;
548 operand_type_set (&intel_state
.reloc_types
, ~0);
549 gas_assert (!intel_state
.in_offset
);
550 gas_assert (!intel_state
.in_bracket
);
551 gas_assert (!intel_state
.in_scale
);
553 saved_input_line_pointer
= input_line_pointer
;
554 input_line_pointer
= buf
= xstrdup (operand_string
);
557 memset (&exp
, 0, sizeof(exp
));
558 exp_seg
= expression (&exp
);
559 ret
= i386_intel_simplify (&exp
);
564 /* Handle vector operations. */
565 if (*input_line_pointer
== '{')
567 char *end
= check_VecOperations (input_line_pointer
, NULL
);
569 input_line_pointer
= end
;
574 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
576 as_bad (_("junk `%s' after expression"), input_line_pointer
);
579 else if (exp
.X_op
== O_illegal
|| exp
.X_op
== O_absent
)
581 as_bad (_("invalid expression"));
584 else if (!intel_state
.has_offset
585 && input_line_pointer
> buf
586 && *(input_line_pointer
- 1) == ']')
588 intel_state
.is_mem
|= 1;
589 intel_state
.is_indirect
= 1;
592 input_line_pointer
= saved_input_line_pointer
;
595 gas_assert (!intel_state
.in_offset
);
596 gas_assert (!intel_state
.in_bracket
);
597 gas_assert (!intel_state
.in_scale
);
602 if (intel_state
.op_modifier
!= O_absent
603 && current_templates
->start
->base_opcode
!= 0x8d /* lea */)
605 i
.types
[this_operand
].bitfield
.unspecified
= 0;
607 switch (intel_state
.op_modifier
)
610 i
.types
[this_operand
].bitfield
.byte
= 1;
611 suffix
= BYTE_MNEM_SUFFIX
;
615 i
.types
[this_operand
].bitfield
.word
= 1;
616 if ((current_templates
->start
->name
[0] == 'l'
617 && current_templates
->start
->name
[2] == 's'
618 && current_templates
->start
->name
[3] == 0)
619 || current_templates
->start
->base_opcode
== 0x62 /* bound */)
620 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
621 else if (got_a_float
== 2) /* "fi..." */
622 suffix
= SHORT_MNEM_SUFFIX
;
624 suffix
= WORD_MNEM_SUFFIX
;
628 i
.types
[this_operand
].bitfield
.dword
= 1;
629 if ((current_templates
->start
->name
[0] == 'l'
630 && current_templates
->start
->name
[2] == 's'
631 && current_templates
->start
->name
[3] == 0)
632 || current_templates
->start
->base_opcode
== 0x62 /* bound */)
633 suffix
= WORD_MNEM_SUFFIX
;
634 else if (flag_code
== CODE_16BIT
635 && (current_templates
->start
->opcode_modifier
.jump
636 || current_templates
->start
->opcode_modifier
.jumpdword
))
637 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
638 else if (got_a_float
== 1) /* "f..." */
639 suffix
= SHORT_MNEM_SUFFIX
;
641 suffix
= LONG_MNEM_SUFFIX
;
645 i
.types
[this_operand
].bitfield
.fword
= 1;
646 if (current_templates
->start
->name
[0] == 'l'
647 && current_templates
->start
->name
[2] == 's'
648 && current_templates
->start
->name
[3] == 0)
649 suffix
= LONG_MNEM_SUFFIX
;
650 else if (!got_a_float
)
652 if (flag_code
== CODE_16BIT
)
653 add_prefix (DATA_PREFIX_OPCODE
);
654 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
657 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
661 i
.types
[this_operand
].bitfield
.qword
= 1;
662 if (current_templates
->start
->base_opcode
== 0x62 /* bound */
663 || got_a_float
== 1) /* "f..." */
664 suffix
= LONG_MNEM_SUFFIX
;
666 suffix
= QWORD_MNEM_SUFFIX
;
670 i
.types
[this_operand
].bitfield
.tbyte
= 1;
671 if (got_a_float
== 1)
672 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
674 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
679 i
.types
[this_operand
].bitfield
.xmmword
= 1;
680 suffix
= XMMWORD_MNEM_SUFFIX
;
684 i
.types
[this_operand
].bitfield
.ymmword
= 1;
685 suffix
= YMMWORD_MNEM_SUFFIX
;
689 i
.types
[this_operand
].bitfield
.zmmword
= 1;
690 suffix
= ZMMWORD_MNEM_SUFFIX
;
694 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
697 if (!current_templates
->start
->opcode_modifier
.jump
698 && !current_templates
->start
->opcode_modifier
.jumpdword
)
699 suffix
= got_a_float
/* so it will cause an error */
701 : LONG_DOUBLE_MNEM_SUFFIX
;
705 BAD_CASE (intel_state
.op_modifier
);
711 else if (i
.suffix
!= suffix
)
713 as_bad (_("conflicting operand size modifiers"));
718 /* Operands for jump/call need special consideration. */
719 if (current_templates
->start
->opcode_modifier
.jump
720 || current_templates
->start
->opcode_modifier
.jumpdword
721 || current_templates
->start
->opcode_modifier
.jumpintersegment
)
723 if (i
.op
[this_operand
].regs
726 || intel_state
.is_mem
> 1)
727 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
729 switch (intel_state
.op_modifier
)
733 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
735 intel_state
.is_mem
= 1;
739 if (!intel_state
.seg
)
741 intel_state
.is_mem
= 1;
742 if (intel_state
.op_modifier
== O_absent
)
744 if (intel_state
.is_indirect
== 1)
745 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
748 as_bad (_("cannot infer the segment part of the operand"));
751 else if (S_GET_SEGMENT (intel_state
.seg
) == reg_section
)
752 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
755 i386_operand_type types
;
757 if (i
.imm_operands
>= MAX_IMMEDIATE_OPERANDS
)
759 as_bad (_("at most %d immediate operands are allowed"),
760 MAX_IMMEDIATE_OPERANDS
);
763 expP
= &im_expressions
[i
.imm_operands
++];
764 memset (expP
, 0, sizeof(*expP
));
765 expP
->X_op
= O_symbol
;
766 expP
->X_add_symbol
= intel_state
.seg
;
767 i
.op
[this_operand
].imms
= expP
;
769 resolve_expression (expP
);
770 operand_type_set (&types
, ~0);
771 if (!i386_finalize_immediate (S_GET_SEGMENT (intel_state
.seg
),
772 expP
, types
, operand_string
))
774 if (i
.operands
< MAX_OPERANDS
)
776 this_operand
= i
.operands
++;
777 i
.types
[this_operand
].bitfield
.unspecified
= 1;
779 if (suffix
== LONG_DOUBLE_MNEM_SUFFIX
)
781 intel_state
.seg
= NULL
;
782 intel_state
.is_mem
= 0;
786 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
789 if (i
.types
[this_operand
].bitfield
.jumpabsolute
)
790 intel_state
.is_mem
|= 1;
792 else if (intel_state
.seg
)
793 intel_state
.is_mem
|= 1;
795 if (i
.op
[this_operand
].regs
)
797 i386_operand_type temp
;
799 /* Register operand. */
800 if (intel_state
.base
|| intel_state
.index
|| intel_state
.seg
)
802 as_bad (_("invalid operand"));
806 temp
= i
.op
[this_operand
].regs
->reg_type
;
807 temp
.bitfield
.baseindex
= 0;
808 i
.types
[this_operand
] = operand_type_or (i
.types
[this_operand
],
810 i
.types
[this_operand
].bitfield
.unspecified
= 0;
813 else if (intel_state
.base
816 || intel_state
.is_mem
)
818 /* Memory operand. */
819 if ((int) i
.mem_operands
820 >= 2 - !current_templates
->start
->opcode_modifier
.isstring
)
824 call 0x9090,0x90909090
825 lcall 0x9090,0x90909090
826 jmp 0x9090,0x90909090
827 ljmp 0x9090,0x90909090
830 if ((current_templates
->start
->opcode_modifier
.jumpintersegment
831 || current_templates
->start
->opcode_modifier
.jumpdword
832 || current_templates
->start
->opcode_modifier
.jump
)
834 && intel_state
.seg
== NULL
835 && i
.mem_operands
== 1
836 && i
.disp_operands
== 1
837 && intel_state
.op_modifier
== O_absent
)
839 /* Try to process the first operand as immediate, */
841 if (i386_finalize_immediate (exp_seg
, i
.op
[0].imms
,
842 intel_state
.reloc_types
,
846 expP
= &im_expressions
[0];
847 i
.op
[this_operand
].imms
= expP
;
850 /* Try to process the second operand as immediate, */
851 if (i386_finalize_immediate (exp_seg
, expP
,
852 intel_state
.reloc_types
,
858 i
.types
[0].bitfield
.mem
= 0;
859 i
.types
[0].bitfield
.disp16
= 0;
860 i
.types
[0].bitfield
.disp32
= 0;
861 i
.types
[0].bitfield
.disp32s
= 0;
867 as_bad (_("too many memory references for `%s'"),
868 current_templates
->start
->name
);
872 expP
= &disp_expressions
[i
.disp_operands
];
873 memcpy (expP
, &exp
, sizeof(exp
));
874 resolve_expression (expP
);
876 if (expP
->X_op
!= O_constant
877 || expP
->X_add_number
878 || (!intel_state
.base
879 && !intel_state
.index
))
881 i
.op
[this_operand
].disps
= expP
;
884 if (flag_code
== CODE_64BIT
)
886 i
.types
[this_operand
].bitfield
.disp32
= 1;
887 if (!i
.prefix
[ADDR_PREFIX
])
889 i
.types
[this_operand
].bitfield
.disp64
= 1;
890 i
.types
[this_operand
].bitfield
.disp32s
= 1;
893 else if (!i
.prefix
[ADDR_PREFIX
] ^ (flag_code
== CODE_16BIT
))
894 i
.types
[this_operand
].bitfield
.disp32
= 1;
896 i
.types
[this_operand
].bitfield
.disp16
= 1;
898 #if defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT)
900 * exp_seg is used only for verification in
901 * i386_finalize_displacement, and we can end up seeing reg_section
902 * here - but we know we removed all registers from the expression
903 * (or error-ed on any remaining ones) in i386_intel_simplify. I
904 * consider the check in i386_finalize_displacement bogus anyway, in
905 * particular because it doesn't allow for expr_section, so I'd
906 * rather see that check (and the similar one in
907 * i386_finalize_immediate) use SEG_NORMAL(), but not being an a.out
908 * expert I can't really say whether that would have other bad side
911 if (OUTPUT_FLAVOR
== bfd_target_aout_flavour
912 && exp_seg
== reg_section
)
913 exp_seg
= expP
->X_op
!= O_constant
? undefined_section
917 if (!i386_finalize_displacement (exp_seg
, expP
,
918 intel_state
.reloc_types
,
923 if (intel_state
.base
|| intel_state
.index
)
924 i
.types
[this_operand
].bitfield
.baseindex
= 1;
930 expP
= symbol_get_value_expression (intel_state
.seg
);
931 if (expP
->X_op
!= O_full_ptr
)
933 intel_state
.seg
= expP
->X_add_symbol
;
935 if (expP
->X_op
!= O_register
)
937 as_bad (_("segment register name expected"));
940 if (!i386_regtab
[expP
->X_add_number
].reg_type
.bitfield
.sreg2
941 && !i386_regtab
[expP
->X_add_number
].reg_type
.bitfield
.sreg3
)
943 as_bad (_("invalid use of register"));
946 switch (i386_regtab
[expP
->X_add_number
].reg_num
)
948 case 0: i
.seg
[i
.mem_operands
] = &es
; break;
949 case 1: i
.seg
[i
.mem_operands
] = &cs
; break;
950 case 2: i
.seg
[i
.mem_operands
] = &ss
; break;
951 case 3: i
.seg
[i
.mem_operands
] = &ds
; break;
952 case 4: i
.seg
[i
.mem_operands
] = &fs
; break;
953 case 5: i
.seg
[i
.mem_operands
] = &gs
; break;
954 case RegFlat
: i
.seg
[i
.mem_operands
] = NULL
; break;
958 /* Swap base and index in 16-bit memory operands like
959 [si+bx]. Since i386_index_check is also used in AT&T
960 mode we have to do that here. */
963 && intel_state
.base
->reg_type
.bitfield
.reg16
964 && intel_state
.index
->reg_type
.bitfield
.reg16
965 && intel_state
.base
->reg_num
>= 6
966 && intel_state
.index
->reg_num
< 6)
968 i
.base_reg
= intel_state
.index
;
969 i
.index_reg
= intel_state
.base
;
973 i
.base_reg
= intel_state
.base
;
974 i
.index_reg
= intel_state
.index
;
977 if (!i386_index_check (operand_string
))
980 i
.types
[this_operand
].bitfield
.mem
= 1;
986 if (i
.imm_operands
>= MAX_IMMEDIATE_OPERANDS
)
988 as_bad (_("at most %d immediate operands are allowed"),
989 MAX_IMMEDIATE_OPERANDS
);
993 expP
= &im_expressions
[i
.imm_operands
++];
994 i
.op
[this_operand
].imms
= expP
;
997 return i386_finalize_immediate (exp_seg
, expP
, intel_state
.reloc_types
,