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 if (! strcmp (name
, "$"))
196 current_location (e
);
200 for (j
= 0; i386_types
[j
].name
; ++j
)
201 if (strcasecmp(i386_types
[j
].name
, name
) == 0)
203 e
->X_op
= O_constant
;
204 e
->X_add_number
= i386_types
[j
].sz
[flag_code
];
205 e
->X_add_symbol
= NULL
;
206 e
->X_op_symbol
= NULL
;
213 static INLINE
int i386_intel_check (const reg_entry
*rreg
,
214 const reg_entry
*base
,
215 const reg_entry
*iindex
)
217 if ((this_operand
>= 0 && rreg
!= i
.op
[this_operand
].regs
)
218 || base
!= intel_state
.base
|| iindex
!= intel_state
.index
)
220 as_bad (_("invalid use of register"));
226 static INLINE
void i386_intel_fold (expressionS
*e
, symbolS
*sym
)
228 if (S_GET_SEGMENT (sym
) == absolute_section
)
230 offsetT val
= e
->X_add_number
;
232 *e
= *symbol_get_value_expression (sym
);
233 e
->X_add_number
+= val
;
237 e
->X_add_symbol
= sym
;
238 e
->X_op_symbol
= NULL
;
244 i386_intel_simplify_register (expressionS
*e
)
248 if (this_operand
< 0 || intel_state
.in_offset
)
250 as_bad (_("invalid use of register"));
254 if (e
->X_op
== O_register
)
255 reg_num
= e
->X_add_number
;
257 reg_num
= e
->X_md
- 1;
259 if (!intel_state
.in_bracket
)
261 if (i
.op
[this_operand
].regs
)
263 as_bad (_("invalid use of register"));
266 if (i386_regtab
[reg_num
].reg_type
.bitfield
.sreg3
267 && i386_regtab
[reg_num
].reg_num
== RegFlat
)
269 as_bad (_("invalid use of pseudo-register"));
272 i
.op
[this_operand
].regs
= i386_regtab
+ reg_num
;
274 else if (!intel_state
.base
&& !intel_state
.in_scale
)
275 intel_state
.base
= i386_regtab
+ reg_num
;
276 else if (!intel_state
.index
)
277 intel_state
.index
= i386_regtab
+ reg_num
;
280 /* esp is invalid as index */
281 intel_state
.index
= i386_regtab
+ REGNAM_EAX
+ 4;
286 static int i386_intel_simplify (expressionS
*);
288 static INLINE
int i386_intel_simplify_symbol(symbolS
*sym
)
290 int ret
= i386_intel_simplify (symbol_get_value_expression (sym
));
294 S_SET_SEGMENT(sym
, absolute_section
);
300 static int i386_intel_simplify (expressionS
*e
)
302 const reg_entry
*the_reg
= this_operand
>= 0 ? i
.op
[this_operand
].regs
: NULL
;
303 const reg_entry
*base
= intel_state
.base
;
304 const reg_entry
*state_index
= intel_state
.index
;
315 if (!i386_intel_simplify_symbol (e
->X_add_symbol
)
316 || !i386_intel_check(the_reg
, intel_state
.base
, intel_state
.index
))
319 if (!intel_state
.in_offset
)
320 ++intel_state
.in_bracket
;
321 ret
= i386_intel_simplify_symbol (e
->X_op_symbol
);
322 if (!intel_state
.in_offset
)
323 --intel_state
.in_bracket
;
329 i386_intel_fold (e
, e
->X_op_symbol
);
333 intel_state
.has_offset
= 1;
334 ++intel_state
.in_offset
;
335 ret
= i386_intel_simplify_symbol (e
->X_add_symbol
);
336 --intel_state
.in_offset
;
337 if (!ret
|| !i386_intel_check(the_reg
, base
, state_index
))
339 i386_intel_fold (e
, e
->X_add_symbol
);
353 if (intel_state
.op_modifier
== O_absent
)
354 intel_state
.op_modifier
= e
->X_op
;
357 if (symbol_get_value_expression (e
->X_add_symbol
)->X_op
== O_register
)
359 as_bad (_("invalid use of register"));
362 if (!i386_intel_simplify_symbol (e
->X_add_symbol
))
364 i386_intel_fold (e
, e
->X_add_symbol
);
368 if (symbol_get_value_expression (e
->X_op_symbol
)->X_op
== O_register
)
370 as_bad (_("invalid use of register"));
373 if (!i386_intel_simplify_symbol (e
->X_op_symbol
)
374 || !i386_intel_check(the_reg
, intel_state
.base
, intel_state
.index
))
376 if (!intel_state
.in_offset
)
377 intel_state
.seg
= e
->X_add_symbol
;
378 i386_intel_fold (e
, e
->X_op_symbol
);
382 if (this_operand
>= 0 && intel_state
.in_bracket
)
384 expressionS
*scale
= NULL
;
386 if (intel_state
.index
)
389 if (!intel_state
.in_scale
++)
390 intel_state
.scale_factor
= 1;
392 ret
= i386_intel_simplify_symbol (e
->X_add_symbol
);
393 if (ret
&& !scale
&& intel_state
.index
)
394 scale
= symbol_get_value_expression (e
->X_op_symbol
);
397 ret
= i386_intel_simplify_symbol (e
->X_op_symbol
);
398 if (ret
&& !scale
&& intel_state
.index
)
399 scale
= symbol_get_value_expression (e
->X_add_symbol
);
401 if (ret
&& scale
&& (scale
+ 1))
403 resolve_expression (scale
);
404 if (scale
->X_op
!= O_constant
405 || intel_state
.index
->reg_type
.bitfield
.reg16
)
406 scale
->X_add_number
= 0;
407 intel_state
.scale_factor
*= scale
->X_add_number
;
410 --intel_state
.in_scale
;
414 if (!intel_state
.in_scale
)
415 switch (intel_state
.scale_factor
)
418 i
.log2_scale_factor
= 0;
421 i
.log2_scale_factor
= 1;
424 i
.log2_scale_factor
= 2;
427 i
.log2_scale_factor
= 3;
430 /* esp is invalid as index */
431 intel_state
.index
= i386_regtab
+ REGNAM_EAX
+ 4;
439 ret
= i386_intel_simplify_register (e
);
442 gas_assert (e
->X_add_number
< (unsigned short) -1);
443 e
->X_md
= (unsigned short) e
->X_add_number
+ 1;
444 e
->X_op
= O_constant
;
451 return i386_intel_simplify_register (e
);
455 if (e
->X_add_symbol
&& !i386_intel_simplify_symbol (e
->X_add_symbol
))
457 if (e
->X_op
== O_add
|| e
->X_op
== O_subtract
)
459 base
= intel_state
.base
;
460 state_index
= intel_state
.index
;
462 if (!i386_intel_check (the_reg
, base
, state_index
)
463 || (e
->X_op_symbol
&& !i386_intel_simplify_symbol (e
->X_op_symbol
))
464 || !i386_intel_check (the_reg
,
465 e
->X_op
!= O_add
? base
: intel_state
.base
,
466 e
->X_op
!= O_add
? state_index
: intel_state
.index
))
471 if (this_operand
>= 0 && e
->X_op
== O_symbol
&& !intel_state
.in_offset
)
473 segT seg
= S_GET_SEGMENT (e
->X_add_symbol
);
475 if (seg
!= absolute_section
476 && seg
!= reg_section
477 && seg
!= expr_section
)
478 intel_state
.is_mem
|= 2 - !intel_state
.in_bracket
;
484 int i386_need_index_operator (void)
486 return intel_syntax
< 0;
490 i386_intel_operand (char *operand_string
, int got_a_float
)
492 char *saved_input_line_pointer
, *buf
;
494 expressionS exp
, *expP
;
498 /* Initialize state structure. */
499 intel_state
.op_modifier
= O_absent
;
500 intel_state
.is_mem
= 0;
501 intel_state
.is_indirect
= 0;
502 intel_state
.has_offset
= 0;
503 intel_state
.base
= NULL
;
504 intel_state
.index
= NULL
;
505 intel_state
.seg
= NULL
;
506 operand_type_set (&intel_state
.reloc_types
, ~0);
507 gas_assert (!intel_state
.in_offset
);
508 gas_assert (!intel_state
.in_bracket
);
509 gas_assert (!intel_state
.in_scale
);
511 saved_input_line_pointer
= input_line_pointer
;
512 input_line_pointer
= buf
= xstrdup (operand_string
);
515 memset (&exp
, 0, sizeof(exp
));
516 exp_seg
= expression (&exp
);
517 ret
= i386_intel_simplify (&exp
);
521 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
523 as_bad (_("junk `%s' after expression"), input_line_pointer
);
526 else if (exp
.X_op
== O_illegal
|| exp
.X_op
== O_absent
)
528 as_bad (_("invalid expression"));
531 else if (!intel_state
.has_offset
532 && input_line_pointer
> buf
533 && *(input_line_pointer
- 1) == ']')
535 intel_state
.is_mem
|= 1;
536 intel_state
.is_indirect
= 1;
539 input_line_pointer
= saved_input_line_pointer
;
542 gas_assert (!intel_state
.in_offset
);
543 gas_assert (!intel_state
.in_bracket
);
544 gas_assert (!intel_state
.in_scale
);
549 if (intel_state
.op_modifier
!= O_absent
550 && current_templates
->start
->base_opcode
!= 0x8d /* lea */)
552 i
.types
[this_operand
].bitfield
.unspecified
= 0;
554 switch (intel_state
.op_modifier
)
557 i
.types
[this_operand
].bitfield
.byte
= 1;
558 suffix
= BYTE_MNEM_SUFFIX
;
562 i
.types
[this_operand
].bitfield
.word
= 1;
563 if ((current_templates
->start
->name
[0] == 'l'
564 && current_templates
->start
->name
[2] == 's'
565 && current_templates
->start
->name
[3] == 0)
566 || current_templates
->start
->base_opcode
== 0x62 /* bound */)
567 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
568 else if (got_a_float
== 2) /* "fi..." */
569 suffix
= SHORT_MNEM_SUFFIX
;
571 suffix
= WORD_MNEM_SUFFIX
;
575 i
.types
[this_operand
].bitfield
.dword
= 1;
576 if ((current_templates
->start
->name
[0] == 'l'
577 && current_templates
->start
->name
[2] == 's'
578 && current_templates
->start
->name
[3] == 0)
579 || current_templates
->start
->base_opcode
== 0x62 /* bound */)
580 suffix
= WORD_MNEM_SUFFIX
;
581 else if (flag_code
== CODE_16BIT
582 && (current_templates
->start
->opcode_modifier
.jump
583 || current_templates
->start
->opcode_modifier
.jumpdword
))
584 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
585 else if (got_a_float
== 1) /* "f..." */
586 suffix
= SHORT_MNEM_SUFFIX
;
588 suffix
= LONG_MNEM_SUFFIX
;
592 i
.types
[this_operand
].bitfield
.fword
= 1;
593 if (current_templates
->start
->name
[0] == 'l'
594 && current_templates
->start
->name
[2] == 's'
595 && current_templates
->start
->name
[3] == 0)
596 suffix
= LONG_MNEM_SUFFIX
;
597 else if (!got_a_float
)
599 if (flag_code
== CODE_16BIT
)
600 add_prefix (DATA_PREFIX_OPCODE
);
601 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
604 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
608 i
.types
[this_operand
].bitfield
.qword
= 1;
609 if (current_templates
->start
->base_opcode
== 0x62 /* bound */
610 || got_a_float
== 1) /* "f..." */
611 suffix
= LONG_MNEM_SUFFIX
;
613 suffix
= QWORD_MNEM_SUFFIX
;
617 i
.types
[this_operand
].bitfield
.tbyte
= 1;
618 if (got_a_float
== 1)
619 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
621 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
626 i
.types
[this_operand
].bitfield
.xmmword
= 1;
627 suffix
= XMMWORD_MNEM_SUFFIX
;
631 i
.types
[this_operand
].bitfield
.ymmword
= 1;
632 suffix
= YMMWORD_MNEM_SUFFIX
;
636 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
639 if (!current_templates
->start
->opcode_modifier
.jump
640 && !current_templates
->start
->opcode_modifier
.jumpdword
)
641 suffix
= got_a_float
/* so it will cause an error */
643 : LONG_DOUBLE_MNEM_SUFFIX
;
647 BAD_CASE (intel_state
.op_modifier
);
653 else if (i
.suffix
!= suffix
)
655 as_bad (_("conflicting operand size modifiers"));
660 /* Operands for jump/call need special consideration. */
661 if (current_templates
->start
->opcode_modifier
.jump
662 || current_templates
->start
->opcode_modifier
.jumpdword
663 || current_templates
->start
->opcode_modifier
.jumpintersegment
)
665 if (i
.op
[this_operand
].regs
|| intel_state
.base
|| intel_state
.index
666 || intel_state
.is_mem
> 1)
667 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
669 switch (intel_state
.op_modifier
)
673 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
675 intel_state
.is_mem
= 1;
679 if (!intel_state
.seg
)
681 intel_state
.is_mem
= 1;
682 if (intel_state
.op_modifier
== O_absent
)
684 if (intel_state
.is_indirect
== 1)
685 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
688 as_bad (_("cannot infer the segment part of the operand"));
691 else if (S_GET_SEGMENT (intel_state
.seg
) == reg_section
)
692 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
695 i386_operand_type types
;
697 if (i
.imm_operands
>= MAX_IMMEDIATE_OPERANDS
)
699 as_bad (_("at most %d immediate operands are allowed"),
700 MAX_IMMEDIATE_OPERANDS
);
703 expP
= &im_expressions
[i
.imm_operands
++];
704 memset (expP
, 0, sizeof(*expP
));
705 expP
->X_op
= O_symbol
;
706 expP
->X_add_symbol
= intel_state
.seg
;
707 i
.op
[this_operand
].imms
= expP
;
709 resolve_expression (expP
);
710 operand_type_set (&types
, ~0);
711 if (!i386_finalize_immediate (S_GET_SEGMENT (intel_state
.seg
),
712 expP
, types
, operand_string
))
714 if (i
.operands
< MAX_OPERANDS
)
716 this_operand
= i
.operands
++;
717 i
.types
[this_operand
].bitfield
.unspecified
= 1;
719 if (suffix
== LONG_DOUBLE_MNEM_SUFFIX
)
721 intel_state
.seg
= NULL
;
722 intel_state
.is_mem
= 0;
726 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
729 if (i
.types
[this_operand
].bitfield
.jumpabsolute
)
730 intel_state
.is_mem
|= 1;
732 else if (intel_state
.seg
)
733 intel_state
.is_mem
|= 1;
735 if (i
.op
[this_operand
].regs
)
737 i386_operand_type temp
;
739 /* Register operand. */
740 if (intel_state
.base
|| intel_state
.index
|| intel_state
.seg
)
742 as_bad (_("invalid operand"));
746 temp
= i
.op
[this_operand
].regs
->reg_type
;
747 temp
.bitfield
.baseindex
= 0;
748 i
.types
[this_operand
] = operand_type_or (i
.types
[this_operand
], temp
);
749 i
.types
[this_operand
].bitfield
.unspecified
= 0;
752 else if (intel_state
.base
|| intel_state
.index
|| intel_state
.seg
753 || intel_state
.is_mem
)
755 /* Memory operand. */
757 >= 2 - !current_templates
->start
->opcode_modifier
.isstring
)
761 call 0x9090,0x90909090
762 lcall 0x9090,0x90909090
763 jmp 0x9090,0x90909090
764 ljmp 0x9090,0x90909090
767 if ((current_templates
->start
->opcode_modifier
.jumpintersegment
768 || current_templates
->start
->opcode_modifier
.jumpdword
769 || current_templates
->start
->opcode_modifier
.jump
)
771 && intel_state
.seg
== NULL
772 && i
.mem_operands
== 1
773 && i
.disp_operands
== 1
774 && intel_state
.op_modifier
== O_absent
)
776 /* Try to process the first operand as immediate, */
778 if (i386_finalize_immediate (exp_seg
, i
.op
[0].imms
,
779 intel_state
.reloc_types
,
783 expP
= &im_expressions
[0];
784 i
.op
[this_operand
].imms
= expP
;
787 /* Try to process the second operand as immediate, */
788 if (i386_finalize_immediate (exp_seg
, expP
,
789 intel_state
.reloc_types
,
795 i
.types
[0].bitfield
.mem
= 0;
796 i
.types
[0].bitfield
.disp16
= 0;
797 i
.types
[0].bitfield
.disp32
= 0;
798 i
.types
[0].bitfield
.disp32s
= 0;
804 as_bad (_("too many memory references for `%s'"),
805 current_templates
->start
->name
);
809 expP
= &disp_expressions
[i
.disp_operands
];
810 memcpy (expP
, &exp
, sizeof(exp
));
811 resolve_expression (expP
);
813 if (expP
->X_op
!= O_constant
|| expP
->X_add_number
814 || (!intel_state
.base
&& !intel_state
.index
))
816 i
.op
[this_operand
].disps
= expP
;
819 if (flag_code
== CODE_64BIT
)
821 i
.types
[this_operand
].bitfield
.disp32
= 1;
822 if (!i
.prefix
[ADDR_PREFIX
])
824 i
.types
[this_operand
].bitfield
.disp64
= 1;
825 i
.types
[this_operand
].bitfield
.disp32s
= 1;
828 else if (!i
.prefix
[ADDR_PREFIX
] ^ (flag_code
== CODE_16BIT
))
829 i
.types
[this_operand
].bitfield
.disp32
= 1;
831 i
.types
[this_operand
].bitfield
.disp16
= 1;
833 #if defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT)
835 * exp_seg is used only for verification in
836 * i386_finalize_displacement, and we can end up seeing reg_section
837 * here - but we know we removed all registers from the expression
838 * (or error-ed on any remaining ones) in i386_intel_simplify. I
839 * consider the check in i386_finalize_displacement bogus anyway, in
840 * particular because it doesn't allow for expr_section, so I'd
841 * rather see that check (and the similar one in
842 * i386_finalize_immediate) use SEG_NORMAL(), but not being an a.out
843 * expert I can't really say whether that would have other bad side
846 if (OUTPUT_FLAVOR
== bfd_target_aout_flavour
847 && exp_seg
== reg_section
)
848 exp_seg
= expP
->X_op
!= O_constant
? undefined_section
852 if (!i386_finalize_displacement (exp_seg
, expP
,
853 intel_state
.reloc_types
,
858 if (intel_state
.base
|| intel_state
.index
)
859 i
.types
[this_operand
].bitfield
.baseindex
= 1;
865 expP
= symbol_get_value_expression (intel_state
.seg
);
866 if (expP
->X_op
!= O_full_ptr
)
868 intel_state
.seg
= expP
->X_add_symbol
;
870 if (expP
->X_op
!= O_register
)
872 as_bad (_("segment register name expected"));
875 if (!i386_regtab
[expP
->X_add_number
].reg_type
.bitfield
.sreg2
876 && !i386_regtab
[expP
->X_add_number
].reg_type
.bitfield
.sreg3
)
878 as_bad (_("invalid use of register"));
881 switch (i386_regtab
[expP
->X_add_number
].reg_num
)
883 case 0: i
.seg
[i
.mem_operands
] = &es
; break;
884 case 1: i
.seg
[i
.mem_operands
] = &cs
; break;
885 case 2: i
.seg
[i
.mem_operands
] = &ss
; break;
886 case 3: i
.seg
[i
.mem_operands
] = &ds
; break;
887 case 4: i
.seg
[i
.mem_operands
] = &fs
; break;
888 case 5: i
.seg
[i
.mem_operands
] = &gs
; break;
889 case RegFlat
: i
.seg
[i
.mem_operands
] = NULL
; break;
893 /* Swap base and index in 16-bit memory operands like
894 [si+bx]. Since i386_index_check is also used in AT&T
895 mode we have to do that here. */
898 && intel_state
.base
->reg_type
.bitfield
.reg16
899 && intel_state
.index
->reg_type
.bitfield
.reg16
900 && intel_state
.base
->reg_num
>= 6
901 && intel_state
.index
->reg_num
< 6)
903 i
.base_reg
= intel_state
.index
;
904 i
.index_reg
= intel_state
.base
;
908 i
.base_reg
= intel_state
.base
;
909 i
.index_reg
= intel_state
.index
;
912 if (!i386_index_check (operand_string
))
915 i
.types
[this_operand
].bitfield
.mem
= 1;
921 if (i
.imm_operands
>= MAX_IMMEDIATE_OPERANDS
)
923 as_bad (_("at most %d immediate operands are allowed"),
924 MAX_IMMEDIATE_OPERANDS
);
928 expP
= &im_expressions
[i
.imm_operands
++];
929 i
.op
[this_operand
].imms
= expP
;
932 return i386_finalize_immediate (exp_seg
, expP
, intel_state
.reloc_types
,