1 /* tc-i386.c -- Assemble Intel syntax code for ix86/x86-64
3 Free Software Foundation, Inc.
5 This file is part of GAS, the GNU Assembler.
7 GAS 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)
12 GAS is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GAS; see the file COPYING. If not, write to the Free
19 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
24 operatorT op_modifier
; /* Operand modifier. */
25 int is_mem
; /* 1 if operand is memory reference. */
26 int is_indirect
; /* 1 if operand is indirect reference. */
27 int has_offset
; /* 1 if operand has offset. */
28 unsigned int in_offset
; /* >=1 if processing operand of offset. */
29 unsigned int in_bracket
; /* >=1 if processing operand in brackets. */
30 unsigned int in_scale
; /* >=1 if processing multipication operand
32 i386_operand_type reloc_types
; /* Value obtained from lex_got(). */
33 const reg_entry
*base
; /* Base register (if any). */
34 const reg_entry
*index
; /* Index register (if any). */
35 offsetT scale_factor
; /* Accumulated scale factor. */
40 /* offset X_add_symbol */
41 #define O_offset O_md32
42 /* offset X_add_symbol */
43 #define O_short O_md31
44 /* near ptr X_add_symbol */
45 #define O_near_ptr O_md30
46 /* far ptr X_add_symbol */
47 #define O_far_ptr O_md29
48 /* byte ptr X_add_symbol */
49 #define O_byte_ptr O_md28
50 /* word ptr X_add_symbol */
51 #define O_word_ptr O_md27
52 /* dword ptr X_add_symbol */
53 #define O_dword_ptr O_md26
54 /* qword ptr X_add_symbol */
55 #define O_qword_ptr O_md25
56 /* oword ptr X_add_symbol */
57 #define O_oword_ptr O_md24
58 /* fword ptr X_add_symbol */
59 #define O_fword_ptr O_md23
60 /* tbyte ptr X_add_symbol */
61 #define O_tbyte_ptr O_md22
62 /* xmmword ptr X_add_symbol */
63 #define O_xmmword_ptr O_md21
64 /* ymmword ptr X_add_symbol */
65 #define O_ymmword_ptr O_md20
71 unsigned int operands
;
73 const i386_operators
[] =
75 { "and", O_bit_and
, 2 },
81 { "mod", O_modulus
, 2 },
83 { "not", O_bit_not
, 1 },
84 { "offset", O_offset
, 1 },
85 { "or", O_bit_inclusive_or
, 2 },
86 { "shl", O_left_shift
, 2 },
87 { "short", O_short
, 1 },
88 { "shr", O_right_shift
, 2 },
89 { "xor", O_bit_exclusive_or
, 2 },
90 { NULL
, O_illegal
, 0 }
101 #define I386_TYPE(t, n) { #t, O_##t##_ptr, { n, n, n } }
107 I386_TYPE(tbyte
, 10),
108 I386_TYPE(oword
, 16),
109 I386_TYPE(xmmword
, 16),
110 I386_TYPE(ymmword
, 32),
112 { "near", O_near_ptr
, { 0xff04, 0xff02, 0xff08 } },
113 { "far", O_far_ptr
, { 0xff06, 0xff05, 0xff06 } },
114 { NULL
, O_illegal
, { 0, 0, 0 } }
117 operatorT
i386_operator (const char *name
, unsigned int operands
, char *pc
)
128 switch (*input_line_pointer
)
131 ++input_line_pointer
;
134 ++input_line_pointer
;
137 if (this_operand
>= 0 && i
.reloc
[this_operand
] == NO_RELOC
)
140 char *gotfree_input_line
= lex_got (&i
.reloc
[this_operand
],
142 &intel_state
.reloc_types
);
144 if (!gotfree_input_line
)
146 free (gotfree_input_line
);
147 *input_line_pointer
++ = '+';
148 memset (input_line_pointer
, '0', adjust
- 1);
149 input_line_pointer
[adjust
- 1] = ' ';
157 for (j
= 0; i386_operators
[j
].name
; ++j
)
158 if (strcasecmp (i386_operators
[j
].name
, name
) == 0)
160 if (i386_operators
[j
].operands
161 && i386_operators
[j
].operands
!= operands
)
163 return i386_operators
[j
].op
;
166 for (j
= 0; i386_types
[j
].name
; ++j
)
167 if (strcasecmp (i386_types
[j
].name
, name
) == 0)
169 if (i386_types
[j
].name
&& *pc
== ' ')
171 char *pname
= ++input_line_pointer
;
172 char c
= get_symbol_end ();
174 if (strcasecmp (pname
, "ptr") == 0)
178 if (intel_syntax
> 0 || operands
!= 1)
180 return i386_types
[j
].op
;
183 *input_line_pointer
= c
;
184 input_line_pointer
= pname
- 1;
190 static int i386_intel_parse_name (const char *name
, expressionS
*e
)
194 for (j
= 0; i386_types
[j
].name
; ++j
)
195 if (strcasecmp(i386_types
[j
].name
, name
) == 0)
197 e
->X_op
= O_constant
;
198 e
->X_add_number
= i386_types
[j
].sz
[flag_code
];
199 e
->X_add_symbol
= NULL
;
200 e
->X_op_symbol
= NULL
;
207 static INLINE
int i386_intel_check (const reg_entry
*rreg
,
208 const reg_entry
*base
,
209 const reg_entry
*iindex
)
211 if ((this_operand
>= 0 && rreg
!= i
.op
[this_operand
].regs
)
212 || base
!= intel_state
.base
|| iindex
!= intel_state
.index
)
214 as_bad (_("invalid use of register"));
220 static INLINE
void i386_intel_fold (expressionS
*e
, symbolS
*sym
)
222 if (S_GET_SEGMENT (sym
) == absolute_section
)
224 offsetT val
= e
->X_add_number
;
226 *e
= *symbol_get_value_expression (sym
);
227 e
->X_add_number
+= val
;
231 e
->X_add_symbol
= sym
;
232 e
->X_op_symbol
= NULL
;
238 i386_intel_simplify_register (expressionS
*e
)
242 if (this_operand
< 0 || intel_state
.in_offset
)
244 as_bad (_("invalid use of register"));
248 if (e
->X_op
== O_register
)
249 reg_num
= e
->X_add_number
;
251 reg_num
= e
->X_md
- 1;
253 if (!intel_state
.in_bracket
)
255 if (i
.op
[this_operand
].regs
)
257 as_bad (_("invalid use of register"));
260 if (i386_regtab
[reg_num
].reg_type
.bitfield
.sreg3
261 && i386_regtab
[reg_num
].reg_num
== RegFlat
)
263 as_bad (_("invalid use of pseudo-register"));
266 i
.op
[this_operand
].regs
= i386_regtab
+ reg_num
;
268 else if (!intel_state
.base
&& !intel_state
.in_scale
)
269 intel_state
.base
= i386_regtab
+ reg_num
;
270 else if (!intel_state
.index
)
271 intel_state
.index
= i386_regtab
+ reg_num
;
274 /* esp is invalid as index */
275 intel_state
.index
= i386_regtab
+ REGNAM_EAX
+ 4;
280 static int i386_intel_simplify (expressionS
*);
282 static INLINE
int i386_intel_simplify_symbol(symbolS
*sym
)
284 int ret
= i386_intel_simplify (symbol_get_value_expression (sym
));
288 S_SET_SEGMENT(sym
, absolute_section
);
294 static int i386_intel_simplify (expressionS
*e
)
296 const reg_entry
*the_reg
= this_operand
>= 0 ? i
.op
[this_operand
].regs
: NULL
;
297 const reg_entry
*base
= intel_state
.base
;
298 const reg_entry
*state_index
= intel_state
.index
;
309 if (!i386_intel_simplify_symbol (e
->X_add_symbol
)
310 || !i386_intel_check(the_reg
, intel_state
.base
, intel_state
.index
))
313 if (!intel_state
.in_offset
)
314 ++intel_state
.in_bracket
;
315 ret
= i386_intel_simplify_symbol (e
->X_op_symbol
);
316 if (!intel_state
.in_offset
)
317 --intel_state
.in_bracket
;
323 i386_intel_fold (e
, e
->X_op_symbol
);
327 intel_state
.has_offset
= 1;
328 ++intel_state
.in_offset
;
329 ret
= i386_intel_simplify_symbol (e
->X_add_symbol
);
330 --intel_state
.in_offset
;
331 if (!ret
|| !i386_intel_check(the_reg
, base
, state_index
))
333 i386_intel_fold (e
, e
->X_add_symbol
);
347 if (intel_state
.op_modifier
== O_absent
)
348 intel_state
.op_modifier
= e
->X_op
;
351 if (symbol_get_value_expression (e
->X_add_symbol
)->X_op
== O_register
)
353 as_bad (_("invalid use of register"));
356 if (!i386_intel_simplify_symbol (e
->X_add_symbol
))
358 i386_intel_fold (e
, e
->X_add_symbol
);
362 if (symbol_get_value_expression (e
->X_op_symbol
)->X_op
== O_register
)
364 as_bad (_("invalid use of register"));
367 if (!i386_intel_simplify_symbol (e
->X_op_symbol
)
368 || !i386_intel_check(the_reg
, intel_state
.base
, intel_state
.index
))
370 if (!intel_state
.in_offset
)
371 intel_state
.seg
= e
->X_add_symbol
;
372 i386_intel_fold (e
, e
->X_op_symbol
);
376 if (this_operand
>= 0 && intel_state
.in_bracket
)
378 expressionS
*scale
= NULL
;
380 if (intel_state
.index
)
383 if (!intel_state
.in_scale
++)
384 intel_state
.scale_factor
= 1;
386 ret
= i386_intel_simplify_symbol (e
->X_add_symbol
);
387 if (ret
&& !scale
&& intel_state
.index
)
388 scale
= symbol_get_value_expression (e
->X_op_symbol
);
391 ret
= i386_intel_simplify_symbol (e
->X_op_symbol
);
392 if (ret
&& !scale
&& intel_state
.index
)
393 scale
= symbol_get_value_expression (e
->X_add_symbol
);
395 if (ret
&& scale
&& (scale
+ 1))
397 resolve_expression (scale
);
398 if (scale
->X_op
!= O_constant
399 || intel_state
.index
->reg_type
.bitfield
.reg16
)
400 scale
->X_add_number
= 0;
401 intel_state
.scale_factor
*= scale
->X_add_number
;
404 --intel_state
.in_scale
;
408 if (!intel_state
.in_scale
)
409 switch (intel_state
.scale_factor
)
412 i
.log2_scale_factor
= 0;
415 i
.log2_scale_factor
= 1;
418 i
.log2_scale_factor
= 2;
421 i
.log2_scale_factor
= 3;
424 /* esp is invalid as index */
425 intel_state
.index
= i386_regtab
+ REGNAM_EAX
+ 4;
433 ret
= i386_intel_simplify_register (e
);
436 gas_assert (e
->X_add_number
< (unsigned short) -1);
437 e
->X_md
= (unsigned short) e
->X_add_number
+ 1;
438 e
->X_op
= O_constant
;
445 return i386_intel_simplify_register (e
);
449 if (e
->X_add_symbol
&& !i386_intel_simplify_symbol (e
->X_add_symbol
))
451 if (e
->X_op
== O_add
|| e
->X_op
== O_subtract
)
453 base
= intel_state
.base
;
454 state_index
= intel_state
.index
;
456 if (!i386_intel_check (the_reg
, base
, state_index
)
457 || (e
->X_op_symbol
&& !i386_intel_simplify_symbol (e
->X_op_symbol
))
458 || !i386_intel_check (the_reg
,
459 e
->X_op
!= O_add
? base
: intel_state
.base
,
460 e
->X_op
!= O_add
? state_index
: intel_state
.index
))
465 if (this_operand
>= 0 && e
->X_op
== O_symbol
&& !intel_state
.in_offset
)
467 segT seg
= S_GET_SEGMENT (e
->X_add_symbol
);
469 if (seg
!= absolute_section
470 && seg
!= reg_section
471 && seg
!= expr_section
)
472 intel_state
.is_mem
|= 2 - !intel_state
.in_bracket
;
478 int i386_need_index_operator (void)
480 return intel_syntax
< 0;
484 i386_intel_operand (char *operand_string
, int got_a_float
)
486 char *saved_input_line_pointer
, *buf
;
488 expressionS exp
, *expP
;
492 /* Initialize state structure. */
493 intel_state
.op_modifier
= O_absent
;
494 intel_state
.is_mem
= 0;
495 intel_state
.is_indirect
= 0;
496 intel_state
.has_offset
= 0;
497 intel_state
.base
= NULL
;
498 intel_state
.index
= NULL
;
499 intel_state
.seg
= NULL
;
500 operand_type_set (&intel_state
.reloc_types
, ~0);
501 gas_assert (!intel_state
.in_offset
);
502 gas_assert (!intel_state
.in_bracket
);
503 gas_assert (!intel_state
.in_scale
);
505 saved_input_line_pointer
= input_line_pointer
;
506 input_line_pointer
= buf
= xstrdup (operand_string
);
508 /* A '$' followed by an identifier char is an identifier. Otherwise,
509 it's operator '.' followed by an expression. */
510 if (*buf
== '$' && !is_identifier_char (buf
[1]))
514 memset (&exp
, 0, sizeof(exp
));
515 exp_seg
= expression (&exp
);
516 ret
= i386_intel_simplify (&exp
);
520 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
522 as_bad (_("junk `%s' after expression"), input_line_pointer
);
525 else if (exp
.X_op
== O_illegal
|| exp
.X_op
== O_absent
)
527 as_bad (_("invalid expression"));
530 else if (!intel_state
.has_offset
531 && input_line_pointer
> buf
532 && *(input_line_pointer
- 1) == ']')
534 intel_state
.is_mem
|= 1;
535 intel_state
.is_indirect
= 1;
538 input_line_pointer
= saved_input_line_pointer
;
541 gas_assert (!intel_state
.in_offset
);
542 gas_assert (!intel_state
.in_bracket
);
543 gas_assert (!intel_state
.in_scale
);
548 if (intel_state
.op_modifier
!= O_absent
549 && current_templates
->start
->base_opcode
!= 0x8d /* lea */)
551 i
.types
[this_operand
].bitfield
.unspecified
= 0;
553 switch (intel_state
.op_modifier
)
556 i
.types
[this_operand
].bitfield
.byte
= 1;
557 suffix
= BYTE_MNEM_SUFFIX
;
561 i
.types
[this_operand
].bitfield
.word
= 1;
562 if ((current_templates
->start
->name
[0] == 'l'
563 && current_templates
->start
->name
[2] == 's'
564 && current_templates
->start
->name
[3] == 0)
565 || current_templates
->start
->base_opcode
== 0x62 /* bound */)
566 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
567 else if (got_a_float
== 2) /* "fi..." */
568 suffix
= SHORT_MNEM_SUFFIX
;
570 suffix
= WORD_MNEM_SUFFIX
;
574 i
.types
[this_operand
].bitfield
.dword
= 1;
575 if ((current_templates
->start
->name
[0] == 'l'
576 && current_templates
->start
->name
[2] == 's'
577 && current_templates
->start
->name
[3] == 0)
578 || current_templates
->start
->base_opcode
== 0x62 /* bound */)
579 suffix
= WORD_MNEM_SUFFIX
;
580 else if (flag_code
== CODE_16BIT
581 && (current_templates
->start
->opcode_modifier
.jump
582 || current_templates
->start
->opcode_modifier
.jumpdword
))
583 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
584 else if (got_a_float
== 1) /* "f..." */
585 suffix
= SHORT_MNEM_SUFFIX
;
587 suffix
= LONG_MNEM_SUFFIX
;
591 i
.types
[this_operand
].bitfield
.fword
= 1;
592 if (current_templates
->start
->name
[0] == 'l'
593 && current_templates
->start
->name
[2] == 's'
594 && current_templates
->start
->name
[3] == 0)
595 suffix
= LONG_MNEM_SUFFIX
;
596 else if (!got_a_float
)
598 if (flag_code
== CODE_16BIT
)
599 add_prefix (DATA_PREFIX_OPCODE
);
600 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
603 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
607 i
.types
[this_operand
].bitfield
.qword
= 1;
608 if (current_templates
->start
->base_opcode
== 0x62 /* bound */
609 || got_a_float
== 1) /* "f..." */
610 suffix
= LONG_MNEM_SUFFIX
;
612 suffix
= QWORD_MNEM_SUFFIX
;
616 i
.types
[this_operand
].bitfield
.tbyte
= 1;
617 if (got_a_float
== 1)
618 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
620 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
625 i
.types
[this_operand
].bitfield
.xmmword
= 1;
626 suffix
= XMMWORD_MNEM_SUFFIX
;
630 i
.types
[this_operand
].bitfield
.ymmword
= 1;
631 suffix
= YMMWORD_MNEM_SUFFIX
;
635 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
638 if (!current_templates
->start
->opcode_modifier
.jump
639 && !current_templates
->start
->opcode_modifier
.jumpdword
)
640 suffix
= got_a_float
/* so it will cause an error */
642 : LONG_DOUBLE_MNEM_SUFFIX
;
646 BAD_CASE (intel_state
.op_modifier
);
652 else if (i
.suffix
!= suffix
)
654 as_bad (_("conflicting operand size modifiers"));
659 /* Operands for jump/call need special consideration. */
660 if (current_templates
->start
->opcode_modifier
.jump
661 || current_templates
->start
->opcode_modifier
.jumpdword
662 || current_templates
->start
->opcode_modifier
.jumpintersegment
)
664 if (i
.op
[this_operand
].regs
|| intel_state
.base
|| intel_state
.index
665 || intel_state
.is_mem
> 1)
666 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
668 switch (intel_state
.op_modifier
)
672 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
674 intel_state
.is_mem
= 1;
678 if (!intel_state
.seg
)
680 intel_state
.is_mem
= 1;
681 if (intel_state
.op_modifier
== O_absent
)
683 if (intel_state
.is_indirect
== 1)
684 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
687 as_bad (_("cannot infer the segment part of the operand"));
690 else if (S_GET_SEGMENT (intel_state
.seg
) == reg_section
)
691 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
694 i386_operand_type types
;
696 if (i
.imm_operands
>= MAX_IMMEDIATE_OPERANDS
)
698 as_bad (_("at most %d immediate operands are allowed"),
699 MAX_IMMEDIATE_OPERANDS
);
702 expP
= &im_expressions
[i
.imm_operands
++];
703 memset (expP
, 0, sizeof(*expP
));
704 expP
->X_op
= O_symbol
;
705 expP
->X_add_symbol
= intel_state
.seg
;
706 i
.op
[this_operand
].imms
= expP
;
708 resolve_expression (expP
);
709 operand_type_set (&types
, ~0);
710 if (!i386_finalize_immediate (S_GET_SEGMENT (intel_state
.seg
),
711 expP
, types
, operand_string
))
713 if (i
.operands
< MAX_OPERANDS
)
715 this_operand
= i
.operands
++;
716 i
.types
[this_operand
].bitfield
.unspecified
= 1;
718 if (suffix
== LONG_DOUBLE_MNEM_SUFFIX
)
720 intel_state
.seg
= NULL
;
721 intel_state
.is_mem
= 0;
725 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
728 if (i
.types
[this_operand
].bitfield
.jumpabsolute
)
729 intel_state
.is_mem
|= 1;
731 else if (intel_state
.seg
)
732 intel_state
.is_mem
|= 1;
734 if (i
.op
[this_operand
].regs
)
736 i386_operand_type temp
;
738 /* Register operand. */
739 if (intel_state
.base
|| intel_state
.index
|| intel_state
.seg
)
741 as_bad (_("invalid operand"));
745 temp
= i
.op
[this_operand
].regs
->reg_type
;
746 temp
.bitfield
.baseindex
= 0;
747 i
.types
[this_operand
] = operand_type_or (i
.types
[this_operand
], temp
);
748 i
.types
[this_operand
].bitfield
.unspecified
= 0;
751 else if (intel_state
.base
|| intel_state
.index
|| intel_state
.seg
752 || intel_state
.is_mem
)
754 /* Memory operand. */
756 >= 2 - !current_templates
->start
->opcode_modifier
.isstring
)
760 call 0x9090,0x90909090
761 lcall 0x9090,0x90909090
762 jmp 0x9090,0x90909090
763 ljmp 0x9090,0x90909090
766 if ((current_templates
->start
->opcode_modifier
.jumpintersegment
767 || current_templates
->start
->opcode_modifier
.jumpdword
768 || current_templates
->start
->opcode_modifier
.jump
)
770 && intel_state
.seg
== NULL
771 && i
.mem_operands
== 1
772 && i
.disp_operands
== 1
773 && intel_state
.op_modifier
== O_absent
)
775 /* Try to process the first operand as immediate, */
777 if (i386_finalize_immediate (exp_seg
, i
.op
[0].imms
,
778 intel_state
.reloc_types
,
782 expP
= &im_expressions
[0];
783 i
.op
[this_operand
].imms
= expP
;
786 /* Try to process the second operand as immediate, */
787 if (i386_finalize_immediate (exp_seg
, expP
,
788 intel_state
.reloc_types
,
794 i
.types
[0].bitfield
.mem
= 0;
795 i
.types
[0].bitfield
.disp16
= 0;
796 i
.types
[0].bitfield
.disp32
= 0;
797 i
.types
[0].bitfield
.disp32s
= 0;
803 as_bad (_("too many memory references for `%s'"),
804 current_templates
->start
->name
);
808 expP
= &disp_expressions
[i
.disp_operands
];
809 memcpy (expP
, &exp
, sizeof(exp
));
810 resolve_expression (expP
);
812 if (expP
->X_op
!= O_constant
|| expP
->X_add_number
813 || (!intel_state
.base
&& !intel_state
.index
))
815 i
.op
[this_operand
].disps
= expP
;
818 if (flag_code
== CODE_64BIT
)
820 i
.types
[this_operand
].bitfield
.disp32
= 1;
821 if (!i
.prefix
[ADDR_PREFIX
])
823 i
.types
[this_operand
].bitfield
.disp64
= 1;
824 i
.types
[this_operand
].bitfield
.disp32s
= 1;
827 else if (!i
.prefix
[ADDR_PREFIX
] ^ (flag_code
== CODE_16BIT
))
828 i
.types
[this_operand
].bitfield
.disp32
= 1;
830 i
.types
[this_operand
].bitfield
.disp16
= 1;
832 #if defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT)
834 * exp_seg is used only for verification in
835 * i386_finalize_displacement, and we can end up seeing reg_section
836 * here - but we know we removed all registers from the expression
837 * (or error-ed on any remaining ones) in i386_intel_simplify. I
838 * consider the check in i386_finalize_displacement bogus anyway, in
839 * particular because it doesn't allow for expr_section, so I'd
840 * rather see that check (and the similar one in
841 * i386_finalize_immediate) use SEG_NORMAL(), but not being an a.out
842 * expert I can't really say whether that would have other bad side
845 if (OUTPUT_FLAVOR
== bfd_target_aout_flavour
846 && exp_seg
== reg_section
)
847 exp_seg
= expP
->X_op
!= O_constant
? undefined_section
851 if (!i386_finalize_displacement (exp_seg
, expP
,
852 intel_state
.reloc_types
,
857 if (intel_state
.base
|| intel_state
.index
)
858 i
.types
[this_operand
].bitfield
.baseindex
= 1;
864 expP
= symbol_get_value_expression (intel_state
.seg
);
865 if (expP
->X_op
!= O_full_ptr
)
867 intel_state
.seg
= expP
->X_add_symbol
;
869 if (expP
->X_op
!= O_register
)
871 as_bad (_("segment register name expected"));
874 if (!i386_regtab
[expP
->X_add_number
].reg_type
.bitfield
.sreg2
875 && !i386_regtab
[expP
->X_add_number
].reg_type
.bitfield
.sreg3
)
877 as_bad (_("invalid use of register"));
880 switch (i386_regtab
[expP
->X_add_number
].reg_num
)
882 case 0: i
.seg
[i
.mem_operands
] = &es
; break;
883 case 1: i
.seg
[i
.mem_operands
] = &cs
; break;
884 case 2: i
.seg
[i
.mem_operands
] = &ss
; break;
885 case 3: i
.seg
[i
.mem_operands
] = &ds
; break;
886 case 4: i
.seg
[i
.mem_operands
] = &fs
; break;
887 case 5: i
.seg
[i
.mem_operands
] = &gs
; break;
888 case RegFlat
: i
.seg
[i
.mem_operands
] = NULL
; break;
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 that here. */
897 && intel_state
.base
->reg_type
.bitfield
.reg16
898 && intel_state
.index
->reg_type
.bitfield
.reg16
899 && intel_state
.base
->reg_num
>= 6
900 && intel_state
.index
->reg_num
< 6)
902 i
.base_reg
= intel_state
.index
;
903 i
.index_reg
= intel_state
.base
;
907 i
.base_reg
= intel_state
.base
;
908 i
.index_reg
= intel_state
.index
;
911 if (!i386_index_check (operand_string
))
914 i
.types
[this_operand
].bitfield
.mem
= 1;
920 if (i
.imm_operands
>= MAX_IMMEDIATE_OPERANDS
)
922 as_bad (_("at most %d immediate operands are allowed"),
923 MAX_IMMEDIATE_OPERANDS
);
927 expP
= &im_expressions
[i
.imm_operands
++];
928 i
.op
[this_operand
].imms
= expP
;
931 return i386_finalize_immediate (exp_seg
, expP
, intel_state
.reloc_types
,