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
218 && rreg
!= i
.op
[this_operand
].regs
)
219 || base
!= intel_state
.base
220 || iindex
!= intel_state
.index
)
222 as_bad (_("invalid use of register"));
228 static INLINE
void i386_intel_fold (expressionS
*e
, symbolS
*sym
)
230 if (S_GET_SEGMENT (sym
) == absolute_section
)
232 offsetT val
= e
->X_add_number
;
234 *e
= *symbol_get_value_expression (sym
);
235 e
->X_add_number
+= val
;
239 e
->X_add_symbol
= sym
;
240 e
->X_op_symbol
= NULL
;
246 i386_intel_simplify_register (expressionS
*e
)
250 if (this_operand
< 0 || intel_state
.in_offset
)
252 as_bad (_("invalid use of register"));
256 if (e
->X_op
== O_register
)
257 reg_num
= e
->X_add_number
;
259 reg_num
= e
->X_md
- 1;
261 if (!intel_state
.in_bracket
)
263 if (i
.op
[this_operand
].regs
)
265 as_bad (_("invalid use of register"));
268 if (i386_regtab
[reg_num
].reg_type
.bitfield
.sreg3
269 && i386_regtab
[reg_num
].reg_num
== RegFlat
)
271 as_bad (_("invalid use of pseudo-register"));
274 i
.op
[this_operand
].regs
= i386_regtab
+ reg_num
;
276 else if (!intel_state
.base
&& !intel_state
.in_scale
)
277 intel_state
.base
= i386_regtab
+ reg_num
;
278 else if (!intel_state
.index
)
279 intel_state
.index
= i386_regtab
+ reg_num
;
282 /* esp is invalid as index */
283 intel_state
.index
= i386_regtab
+ REGNAM_EAX
+ 4;
288 static int i386_intel_simplify (expressionS
*);
290 static INLINE
int i386_intel_simplify_symbol(symbolS
*sym
)
292 int ret
= i386_intel_simplify (symbol_get_value_expression (sym
));
296 S_SET_SEGMENT(sym
, absolute_section
);
302 static int i386_intel_simplify (expressionS
*e
)
304 const reg_entry
*the_reg
= (this_operand
>= 0
305 ? i
.op
[this_operand
].regs
: NULL
);
306 const reg_entry
*base
= intel_state
.base
;
307 const reg_entry
*state_index
= intel_state
.index
;
318 if (!i386_intel_simplify_symbol (e
->X_add_symbol
)
319 || !i386_intel_check(the_reg
, intel_state
.base
,
323 if (!intel_state
.in_offset
)
324 ++intel_state
.in_bracket
;
325 ret
= i386_intel_simplify_symbol (e
->X_op_symbol
);
326 if (!intel_state
.in_offset
)
327 --intel_state
.in_bracket
;
333 i386_intel_fold (e
, e
->X_op_symbol
);
337 intel_state
.has_offset
= 1;
338 ++intel_state
.in_offset
;
339 ret
= i386_intel_simplify_symbol (e
->X_add_symbol
);
340 --intel_state
.in_offset
;
341 if (!ret
|| !i386_intel_check(the_reg
, base
, state_index
))
343 i386_intel_fold (e
, e
->X_add_symbol
);
357 if (intel_state
.op_modifier
== O_absent
)
358 intel_state
.op_modifier
= e
->X_op
;
361 if (symbol_get_value_expression (e
->X_add_symbol
)->X_op
364 as_bad (_("invalid use of register"));
367 if (!i386_intel_simplify_symbol (e
->X_add_symbol
))
369 i386_intel_fold (e
, e
->X_add_symbol
);
373 if (symbol_get_value_expression (e
->X_op_symbol
)->X_op
376 as_bad (_("invalid use of register"));
379 if (!i386_intel_simplify_symbol (e
->X_op_symbol
)
380 || !i386_intel_check(the_reg
, intel_state
.base
,
383 if (!intel_state
.in_offset
)
384 intel_state
.seg
= e
->X_add_symbol
;
385 i386_intel_fold (e
, e
->X_op_symbol
);
389 if (this_operand
>= 0 && intel_state
.in_bracket
)
391 expressionS
*scale
= NULL
;
393 if (intel_state
.index
)
396 if (!intel_state
.in_scale
++)
397 intel_state
.scale_factor
= 1;
399 ret
= i386_intel_simplify_symbol (e
->X_add_symbol
);
400 if (ret
&& !scale
&& intel_state
.index
)
401 scale
= symbol_get_value_expression (e
->X_op_symbol
);
404 ret
= i386_intel_simplify_symbol (e
->X_op_symbol
);
405 if (ret
&& !scale
&& intel_state
.index
)
406 scale
= symbol_get_value_expression (e
->X_add_symbol
);
408 if (ret
&& scale
&& (scale
+ 1))
410 resolve_expression (scale
);
411 if (scale
->X_op
!= O_constant
412 || intel_state
.index
->reg_type
.bitfield
.reg16
)
413 scale
->X_add_number
= 0;
414 intel_state
.scale_factor
*= scale
->X_add_number
;
417 --intel_state
.in_scale
;
421 if (!intel_state
.in_scale
)
422 switch (intel_state
.scale_factor
)
425 i
.log2_scale_factor
= 0;
428 i
.log2_scale_factor
= 1;
431 i
.log2_scale_factor
= 2;
434 i
.log2_scale_factor
= 3;
437 /* esp is invalid as index */
438 intel_state
.index
= i386_regtab
+ REGNAM_EAX
+ 4;
447 ret
= i386_intel_simplify_register (e
);
450 gas_assert (e
->X_add_number
< (unsigned short) -1);
451 e
->X_md
= (unsigned short) e
->X_add_number
+ 1;
452 e
->X_op
= O_constant
;
459 return i386_intel_simplify_register (e
);
465 && !i386_intel_simplify_symbol (e
->X_add_symbol
))
467 if (e
->X_op
== O_add
|| e
->X_op
== O_subtract
)
469 base
= intel_state
.base
;
470 state_index
= intel_state
.index
;
472 if (!i386_intel_check (the_reg
, base
, state_index
)
474 && !i386_intel_simplify_symbol (e
->X_op_symbol
))
475 || !i386_intel_check (the_reg
,
477 ? base
: intel_state
.base
),
479 ? state_index
: intel_state
.index
)))
484 if (this_operand
>= 0
485 && e
->X_op
== O_symbol
486 && !intel_state
.in_offset
)
488 segT seg
= S_GET_SEGMENT (e
->X_add_symbol
);
490 if (seg
!= absolute_section
491 && seg
!= reg_section
492 && seg
!= expr_section
)
493 intel_state
.is_mem
|= 2 - !intel_state
.in_bracket
;
499 int i386_need_index_operator (void)
501 return intel_syntax
< 0;
505 i386_intel_operand (char *operand_string
, int got_a_float
)
507 char *saved_input_line_pointer
, *buf
;
509 expressionS exp
, *expP
;
513 /* Initialize state structure. */
514 intel_state
.op_modifier
= O_absent
;
515 intel_state
.is_mem
= 0;
516 intel_state
.is_indirect
= 0;
517 intel_state
.has_offset
= 0;
518 intel_state
.base
= NULL
;
519 intel_state
.index
= NULL
;
520 intel_state
.seg
= NULL
;
521 operand_type_set (&intel_state
.reloc_types
, ~0);
522 gas_assert (!intel_state
.in_offset
);
523 gas_assert (!intel_state
.in_bracket
);
524 gas_assert (!intel_state
.in_scale
);
526 saved_input_line_pointer
= input_line_pointer
;
527 input_line_pointer
= buf
= xstrdup (operand_string
);
530 memset (&exp
, 0, sizeof(exp
));
531 exp_seg
= expression (&exp
);
532 ret
= i386_intel_simplify (&exp
);
536 if (!is_end_of_line
[(unsigned char) *input_line_pointer
])
538 as_bad (_("junk `%s' after expression"), input_line_pointer
);
541 else if (exp
.X_op
== O_illegal
|| exp
.X_op
== O_absent
)
543 as_bad (_("invalid expression"));
546 else if (!intel_state
.has_offset
547 && input_line_pointer
> buf
548 && *(input_line_pointer
- 1) == ']')
550 intel_state
.is_mem
|= 1;
551 intel_state
.is_indirect
= 1;
554 input_line_pointer
= saved_input_line_pointer
;
557 gas_assert (!intel_state
.in_offset
);
558 gas_assert (!intel_state
.in_bracket
);
559 gas_assert (!intel_state
.in_scale
);
564 if (intel_state
.op_modifier
!= O_absent
565 && current_templates
->start
->base_opcode
!= 0x8d /* lea */)
567 i
.types
[this_operand
].bitfield
.unspecified
= 0;
569 switch (intel_state
.op_modifier
)
572 i
.types
[this_operand
].bitfield
.byte
= 1;
573 suffix
= BYTE_MNEM_SUFFIX
;
577 i
.types
[this_operand
].bitfield
.word
= 1;
578 if ((current_templates
->start
->name
[0] == 'l'
579 && current_templates
->start
->name
[2] == 's'
580 && current_templates
->start
->name
[3] == 0)
581 || current_templates
->start
->base_opcode
== 0x62 /* bound */)
582 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
583 else if (got_a_float
== 2) /* "fi..." */
584 suffix
= SHORT_MNEM_SUFFIX
;
586 suffix
= WORD_MNEM_SUFFIX
;
590 i
.types
[this_operand
].bitfield
.dword
= 1;
591 if ((current_templates
->start
->name
[0] == 'l'
592 && current_templates
->start
->name
[2] == 's'
593 && current_templates
->start
->name
[3] == 0)
594 || current_templates
->start
->base_opcode
== 0x62 /* bound */)
595 suffix
= WORD_MNEM_SUFFIX
;
596 else if (flag_code
== CODE_16BIT
597 && (current_templates
->start
->opcode_modifier
.jump
598 || current_templates
->start
->opcode_modifier
.jumpdword
))
599 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
600 else if (got_a_float
== 1) /* "f..." */
601 suffix
= SHORT_MNEM_SUFFIX
;
603 suffix
= LONG_MNEM_SUFFIX
;
607 i
.types
[this_operand
].bitfield
.fword
= 1;
608 if (current_templates
->start
->name
[0] == 'l'
609 && current_templates
->start
->name
[2] == 's'
610 && current_templates
->start
->name
[3] == 0)
611 suffix
= LONG_MNEM_SUFFIX
;
612 else if (!got_a_float
)
614 if (flag_code
== CODE_16BIT
)
615 add_prefix (DATA_PREFIX_OPCODE
);
616 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
619 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
623 i
.types
[this_operand
].bitfield
.qword
= 1;
624 if (current_templates
->start
->base_opcode
== 0x62 /* bound */
625 || got_a_float
== 1) /* "f..." */
626 suffix
= LONG_MNEM_SUFFIX
;
628 suffix
= QWORD_MNEM_SUFFIX
;
632 i
.types
[this_operand
].bitfield
.tbyte
= 1;
633 if (got_a_float
== 1)
634 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
636 suffix
= BYTE_MNEM_SUFFIX
; /* so it will cause an error */
641 i
.types
[this_operand
].bitfield
.xmmword
= 1;
642 suffix
= XMMWORD_MNEM_SUFFIX
;
646 i
.types
[this_operand
].bitfield
.ymmword
= 1;
647 suffix
= YMMWORD_MNEM_SUFFIX
;
651 suffix
= LONG_DOUBLE_MNEM_SUFFIX
;
654 if (!current_templates
->start
->opcode_modifier
.jump
655 && !current_templates
->start
->opcode_modifier
.jumpdword
)
656 suffix
= got_a_float
/* so it will cause an error */
658 : LONG_DOUBLE_MNEM_SUFFIX
;
662 BAD_CASE (intel_state
.op_modifier
);
668 else if (i
.suffix
!= suffix
)
670 as_bad (_("conflicting operand size modifiers"));
675 /* Operands for jump/call need special consideration. */
676 if (current_templates
->start
->opcode_modifier
.jump
677 || current_templates
->start
->opcode_modifier
.jumpdword
678 || current_templates
->start
->opcode_modifier
.jumpintersegment
)
680 if (i
.op
[this_operand
].regs
683 || intel_state
.is_mem
> 1)
684 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
686 switch (intel_state
.op_modifier
)
690 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
692 intel_state
.is_mem
= 1;
696 if (!intel_state
.seg
)
698 intel_state
.is_mem
= 1;
699 if (intel_state
.op_modifier
== O_absent
)
701 if (intel_state
.is_indirect
== 1)
702 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
705 as_bad (_("cannot infer the segment part of the operand"));
708 else if (S_GET_SEGMENT (intel_state
.seg
) == reg_section
)
709 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
712 i386_operand_type types
;
714 if (i
.imm_operands
>= MAX_IMMEDIATE_OPERANDS
)
716 as_bad (_("at most %d immediate operands are allowed"),
717 MAX_IMMEDIATE_OPERANDS
);
720 expP
= &im_expressions
[i
.imm_operands
++];
721 memset (expP
, 0, sizeof(*expP
));
722 expP
->X_op
= O_symbol
;
723 expP
->X_add_symbol
= intel_state
.seg
;
724 i
.op
[this_operand
].imms
= expP
;
726 resolve_expression (expP
);
727 operand_type_set (&types
, ~0);
728 if (!i386_finalize_immediate (S_GET_SEGMENT (intel_state
.seg
),
729 expP
, types
, operand_string
))
731 if (i
.operands
< MAX_OPERANDS
)
733 this_operand
= i
.operands
++;
734 i
.types
[this_operand
].bitfield
.unspecified
= 1;
736 if (suffix
== LONG_DOUBLE_MNEM_SUFFIX
)
738 intel_state
.seg
= NULL
;
739 intel_state
.is_mem
= 0;
743 i
.types
[this_operand
].bitfield
.jumpabsolute
= 1;
746 if (i
.types
[this_operand
].bitfield
.jumpabsolute
)
747 intel_state
.is_mem
|= 1;
749 else if (intel_state
.seg
)
750 intel_state
.is_mem
|= 1;
752 if (i
.op
[this_operand
].regs
)
754 i386_operand_type temp
;
756 /* Register operand. */
757 if (intel_state
.base
|| intel_state
.index
|| intel_state
.seg
)
759 as_bad (_("invalid operand"));
763 temp
= i
.op
[this_operand
].regs
->reg_type
;
764 temp
.bitfield
.baseindex
= 0;
765 i
.types
[this_operand
] = operand_type_or (i
.types
[this_operand
],
767 i
.types
[this_operand
].bitfield
.unspecified
= 0;
770 else if (intel_state
.base
773 || intel_state
.is_mem
)
775 /* Memory operand. */
777 >= 2 - !current_templates
->start
->opcode_modifier
.isstring
)
781 call 0x9090,0x90909090
782 lcall 0x9090,0x90909090
783 jmp 0x9090,0x90909090
784 ljmp 0x9090,0x90909090
787 if ((current_templates
->start
->opcode_modifier
.jumpintersegment
788 || current_templates
->start
->opcode_modifier
.jumpdword
789 || current_templates
->start
->opcode_modifier
.jump
)
791 && intel_state
.seg
== NULL
792 && i
.mem_operands
== 1
793 && i
.disp_operands
== 1
794 && intel_state
.op_modifier
== O_absent
)
796 /* Try to process the first operand as immediate, */
798 if (i386_finalize_immediate (exp_seg
, i
.op
[0].imms
,
799 intel_state
.reloc_types
,
803 expP
= &im_expressions
[0];
804 i
.op
[this_operand
].imms
= expP
;
807 /* Try to process the second operand as immediate, */
808 if (i386_finalize_immediate (exp_seg
, expP
,
809 intel_state
.reloc_types
,
815 i
.types
[0].bitfield
.mem
= 0;
816 i
.types
[0].bitfield
.disp16
= 0;
817 i
.types
[0].bitfield
.disp32
= 0;
818 i
.types
[0].bitfield
.disp32s
= 0;
824 as_bad (_("too many memory references for `%s'"),
825 current_templates
->start
->name
);
829 expP
= &disp_expressions
[i
.disp_operands
];
830 memcpy (expP
, &exp
, sizeof(exp
));
831 resolve_expression (expP
);
833 if (expP
->X_op
!= O_constant
834 || expP
->X_add_number
835 || (!intel_state
.base
836 && !intel_state
.index
))
838 i
.op
[this_operand
].disps
= expP
;
841 if (flag_code
== CODE_64BIT
)
843 i
.types
[this_operand
].bitfield
.disp32
= 1;
844 if (!i
.prefix
[ADDR_PREFIX
])
846 i
.types
[this_operand
].bitfield
.disp64
= 1;
847 i
.types
[this_operand
].bitfield
.disp32s
= 1;
850 else if (!i
.prefix
[ADDR_PREFIX
] ^ (flag_code
== CODE_16BIT
))
851 i
.types
[this_operand
].bitfield
.disp32
= 1;
853 i
.types
[this_operand
].bitfield
.disp16
= 1;
855 #if defined (OBJ_AOUT) || defined (OBJ_MAYBE_AOUT)
857 * exp_seg is used only for verification in
858 * i386_finalize_displacement, and we can end up seeing reg_section
859 * here - but we know we removed all registers from the expression
860 * (or error-ed on any remaining ones) in i386_intel_simplify. I
861 * consider the check in i386_finalize_displacement bogus anyway, in
862 * particular because it doesn't allow for expr_section, so I'd
863 * rather see that check (and the similar one in
864 * i386_finalize_immediate) use SEG_NORMAL(), but not being an a.out
865 * expert I can't really say whether that would have other bad side
868 if (OUTPUT_FLAVOR
== bfd_target_aout_flavour
869 && exp_seg
== reg_section
)
870 exp_seg
= expP
->X_op
!= O_constant
? undefined_section
874 if (!i386_finalize_displacement (exp_seg
, expP
,
875 intel_state
.reloc_types
,
880 if (intel_state
.base
|| intel_state
.index
)
881 i
.types
[this_operand
].bitfield
.baseindex
= 1;
887 expP
= symbol_get_value_expression (intel_state
.seg
);
888 if (expP
->X_op
!= O_full_ptr
)
890 intel_state
.seg
= expP
->X_add_symbol
;
892 if (expP
->X_op
!= O_register
)
894 as_bad (_("segment register name expected"));
897 if (!i386_regtab
[expP
->X_add_number
].reg_type
.bitfield
.sreg2
898 && !i386_regtab
[expP
->X_add_number
].reg_type
.bitfield
.sreg3
)
900 as_bad (_("invalid use of register"));
903 switch (i386_regtab
[expP
->X_add_number
].reg_num
)
905 case 0: i
.seg
[i
.mem_operands
] = &es
; break;
906 case 1: i
.seg
[i
.mem_operands
] = &cs
; break;
907 case 2: i
.seg
[i
.mem_operands
] = &ss
; break;
908 case 3: i
.seg
[i
.mem_operands
] = &ds
; break;
909 case 4: i
.seg
[i
.mem_operands
] = &fs
; break;
910 case 5: i
.seg
[i
.mem_operands
] = &gs
; break;
911 case RegFlat
: i
.seg
[i
.mem_operands
] = NULL
; break;
915 /* Swap base and index in 16-bit memory operands like
916 [si+bx]. Since i386_index_check is also used in AT&T
917 mode we have to do that here. */
920 && intel_state
.base
->reg_type
.bitfield
.reg16
921 && intel_state
.index
->reg_type
.bitfield
.reg16
922 && intel_state
.base
->reg_num
>= 6
923 && intel_state
.index
->reg_num
< 6)
925 i
.base_reg
= intel_state
.index
;
926 i
.index_reg
= intel_state
.base
;
930 i
.base_reg
= intel_state
.base
;
931 i
.index_reg
= intel_state
.index
;
934 if (!i386_index_check (operand_string
))
937 i
.types
[this_operand
].bitfield
.mem
= 1;
943 if (i
.imm_operands
>= MAX_IMMEDIATE_OPERANDS
)
945 as_bad (_("at most %d immediate operands are allowed"),
946 MAX_IMMEDIATE_OPERANDS
);
950 expP
= &im_expressions
[i
.imm_operands
++];
951 i
.op
[this_operand
].imms
= expP
;
954 return i386_finalize_immediate (exp_seg
, expP
, intel_state
.reloc_types
,