1 /* tc-fr30.c -- Assembler for the Fujitsu FR30.
2 Copyright 1998, 1999, 2000, 2001 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 2, 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
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
26 #include "opcodes/fr30-desc.h"
27 #include "opcodes/fr30-opc.h"
30 /* Structure to hold all of the different components describing
31 an individual instruction. */
34 const CGEN_INSN
* insn
;
35 const CGEN_INSN
* orig_insn
;
38 CGEN_INSN_INT buffer
[1];
39 #define INSN_VALUE(buf) (*(buf))
41 unsigned char buffer
[CGEN_MAX_INSN_SIZE
];
42 #define INSN_VALUE(buf) (buf)
47 fixS
* fixups
[GAS_CGEN_MAX_FIXUPS
];
48 int indices
[MAX_OPERAND_INSTANCES
];
52 const char comment_chars
[] = ";";
53 const char line_comment_chars
[] = "#";
54 const char line_separator_chars
[] = "|";
55 const char EXP_CHARS
[] = "eE";
56 const char FLT_CHARS
[] = "dD";
58 #define FR30_SHORTOPTS ""
59 const char * md_shortopts
= FR30_SHORTOPTS
;
61 struct option md_longopts
[] =
63 {NULL
, no_argument
, NULL
, 0}
65 size_t md_longopts_size
= sizeof (md_longopts
);
68 md_parse_option (c
, arg
)
81 md_show_usage (stream
)
84 fprintf (stream
, _(" FR30 specific command line options:\n"));
87 /* The target specific pseudo-ops which we support. */
88 const pseudo_typeS md_pseudo_table
[] =
102 /* Initialize the `cgen' interface. */
104 /* Set the machine number and endian. */
105 gas_cgen_cpu_desc
= fr30_cgen_cpu_open (CGEN_CPU_OPEN_MACHS
, 0,
106 CGEN_CPU_OPEN_ENDIAN
,
109 fr30_cgen_init_asm (gas_cgen_cpu_desc
);
111 /* This is a callback from cgen to gas to parse operands. */
112 cgen_set_parse_operand_fn (gas_cgen_cpu_desc
, gas_cgen_parse_operand
);
119 static int last_insn_had_delay_slot
= 0;
124 /* Initialize GAS's cgen interface for a new instruction. */
125 gas_cgen_init_parse ();
127 insn
.insn
= fr30_cgen_assemble_insn
128 (gas_cgen_cpu_desc
, str
, & insn
.fields
, insn
.buffer
, & errmsg
);
136 /* Doesn't really matter what we pass for RELAX_P here. */
137 gas_cgen_finish_insn (insn
.insn
, insn
.buffer
,
138 CGEN_FIELDS_BITSIZE (& insn
.fields
), 1, NULL
);
140 /* Warn about invalid insns in delay slots. */
141 if (last_insn_had_delay_slot
142 && CGEN_INSN_ATTR_VALUE (insn
.insn
, CGEN_INSN_NOT_IN_DELAY_SLOT
))
143 as_warn (_("Instruction %s not allowed in a delay slot."),
144 CGEN_INSN_NAME (insn
.insn
));
146 last_insn_had_delay_slot
147 = CGEN_INSN_ATTR_VALUE (insn
.insn
, CGEN_INSN_DELAY_SLOT
);
150 /* The syntax in the manual says constants begin with '#'.
151 We just ignore it. */
154 md_operand (expressionP
)
155 expressionS
* expressionP
;
157 if (* input_line_pointer
== '#')
159 input_line_pointer
++;
160 expression (expressionP
);
165 md_section_align (segment
, size
)
169 int align
= bfd_get_section_alignment (stdoutput
, segment
);
170 return ((size
+ (1 << align
) - 1) & (-1 << align
));
174 md_undefined_symbol (name
)
180 /* Interface to relax_segment. */
182 /* FIXME: Build table by hand, get it working, then machine generate. */
184 const relax_typeS md_relax_table
[] =
187 1) most positive reach of this state,
188 2) most negative reach of this state,
189 3) how many bytes this mode will add to the size of the current frag
190 4) which index into the table to try if we can't fit into this one. */
192 /* The first entry must be unused because an `rlx_more' value of zero ends
196 /* The displacement used by GAS is from the end of the 2 byte insn,
197 so we subtract 2 from the following. */
198 /* 16 bit insn, 8 bit disp -> 10 bit range.
199 This doesn't handle a branch in the right slot at the border:
200 the "& -4" isn't taken into account. It's not important enough to
201 complicate things over it, so we subtract an extra 2 (or + 2 in -ve
203 {511 - 2 - 2, -512 - 2 + 2, 0, 2 },
204 /* 32 bit insn, 24 bit disp -> 26 bit range. */
205 {0x2000000 - 1 - 2, -0x2000000 - 2, 2, 0 },
206 /* Same thing, but with leading nop for alignment. */
207 {0x2000000 - 1 - 2, -0x2000000 - 2, 4, 0 }
211 fr30_relax_frag (segment
, fragP
, stretch
)
216 /* Address of branch insn. */
217 long address
= fragP
->fr_address
+ fragP
->fr_fix
- 2;
220 /* Keep 32 bit insns aligned on 32 bit boundaries. */
221 if (fragP
->fr_subtype
== 2)
223 if ((address
& 3) != 0)
225 fragP
->fr_subtype
= 3;
229 else if (fragP
->fr_subtype
== 3)
231 if ((address
& 3) == 0)
233 fragP
->fr_subtype
= 2;
239 growth
= relax_frag (segment
, fragP
, stretch
);
241 /* Long jump on odd halfword boundary? */
242 if (fragP
->fr_subtype
== 2 && (address
& 3) != 0)
244 fragP
->fr_subtype
= 3;
252 /* Return an initial guess of the length by which a fragment must grow to
253 hold a branch to reach its destination.
254 Also updates fr_type/fr_subtype as necessary.
256 Called just before doing relaxation.
257 Any symbol that is now undefined will not become defined.
258 The guess for fr_var is ACTUALLY the growth beyond fr_fix.
259 Whatever we do to grow fr_fix or fr_var contributes to our returned value.
260 Although it may not be explicit in the frag, pretend fr_var starts with a
264 md_estimate_size_before_relax (fragP
, segment
)
268 /* The only thing we have to handle here are symbols outside of the
269 current segment. They may be undefined or in a different segment in
270 which case linker scripts may place them anywhere.
271 However, we can't finish the fragment here and emit the reloc as insn
272 alignment requirements may move the insn about. */
274 if (S_GET_SEGMENT (fragP
->fr_symbol
) != segment
)
276 int old_fr_fix
= fragP
->fr_fix
;
278 /* The symbol is undefined in this segment.
279 Change the relaxation subtype to the max allowable and leave
280 all further handling to md_convert_frag. */
281 fragP
->fr_subtype
= 2;
283 #if 0 /* Can't use this, but leave in for illustration. */
284 /* Change 16 bit insn to 32 bit insn. */
285 fragP
->fr_opcode
[0] |= 0x80;
287 /* Increase known (fixed) size of fragment. */
290 /* Create a relocation for it. */
291 fix_new (fragP
, old_fr_fix
, 4,
293 fragP
->fr_offset
, 1 /* pcrel */,
294 /* FIXME: Can't use a real BFD reloc here.
295 gas_cgen_md_apply_fix3 can't handle it. */
296 BFD_RELOC_FR30_26_PCREL
);
298 /* Mark this fragment as finished. */
300 return fragP
->fr_fix
- old_fr_fix
;
303 const CGEN_INSN
* insn
;
306 /* Update the recorded insn.
307 Fortunately we don't have to look very far.
308 FIXME: Change this to record in the instruction the next higher
309 relaxable insn to use. */
310 for (i
= 0, insn
= fragP
->fr_cgen
.insn
; i
< 4; i
++, insn
++)
312 if ((strcmp (CGEN_INSN_MNEMONIC (insn
),
313 CGEN_INSN_MNEMONIC (fragP
->fr_cgen
.insn
))
315 && CGEN_INSN_ATTR_VALUE (insn
, CGEN_INSN_RELAX
))
321 fragP
->fr_cgen
.insn
= insn
;
327 /* Return the size of the variable part of the frag. */
328 return md_relax_table
[fragP
->fr_subtype
].rlx_length
;
331 /* *fragP has been relaxed to its final size, and now needs to have
332 the bytes inside it modified to conform to the new size.
334 Called after relaxation is finished.
335 fragP->fr_type == rs_machine_dependent.
336 fragP->fr_subtype is the subtype of what the address relaxed to. */
339 md_convert_frag (abfd
, sec
, fragP
)
352 opcode
= fragP
->fr_opcode
;
354 /* Address opcode resides at in file space. */
355 opcode_address
= fragP
->fr_address
+ fragP
->fr_fix
- 2;
357 switch (fragP
->fr_subtype
)
361 displacement
= & opcode
[1];
366 displacement
= & opcode
[1];
369 opcode
[2] = opcode
[0] | 0x80;
370 md_number_to_chars (opcode
, PAR_NOP_INSN
, 2);
373 displacement
= & opcode
[3];
379 if (S_GET_SEGMENT (fragP
->fr_symbol
) != sec
)
381 /* symbol must be resolved by linker */
382 if (fragP
->fr_offset
& 3)
383 as_warn (_("Addend to unresolved symbol not on word boundary."));
384 addend
= fragP
->fr_offset
>> 2;
388 /* Address we want to reach in file space. */
389 target_address
= S_GET_VALUE (fragP
->fr_symbol
) + fragP
->fr_offset
;
390 target_address
+= symbol_get_frag (fragP
->fr_symbol
)->fr_address
;
391 addend
= (target_address
- (opcode_address
& -4)) >> 2;
394 /* Create a relocation for symbols that must be resolved by the linker.
395 Otherwise output the completed insn. */
397 if (S_GET_SEGMENT (fragP
->fr_symbol
) != sec
)
399 assert (fragP
->fr_subtype
!= 1);
400 assert (fragP
->fr_cgen
.insn
!= 0);
401 gas_cgen_record_fixup (fragP
,
402 /* Offset of branch insn in frag. */
403 fragP
->fr_fix
+ extension
- 4,
406 /* FIXME: quick hack */
408 CGEN_OPERAND_ENTRY (fragP
->fr_cgen
.opindex
),
410 CGEN_OPERAND_ENTRY (FR30_OPERAND_DISP24
),
412 fragP
->fr_cgen
.opinfo
,
413 fragP
->fr_symbol
, fragP
->fr_offset
);
416 #define SIZE_FROM_RELAX_STATE(n) ((n) == 1 ? 1 : 3)
418 md_number_to_chars (displacement
, (valueT
) addend
,
419 SIZE_FROM_RELAX_STATE (fragP
->fr_subtype
));
421 fragP
->fr_fix
+= extension
;
425 /* Functions concerning relocs. */
427 /* The location from which a PC relative jump should be calculated,
428 given a PC relative reloc. */
431 md_pcrel_from_section (fixP
, sec
)
435 if (fixP
->fx_addsy
!= (symbolS
*) NULL
436 && (! S_IS_DEFINED (fixP
->fx_addsy
)
437 || S_GET_SEGMENT (fixP
->fx_addsy
) != sec
))
439 /* The symbol is undefined (or is defined but not in this section).
440 Let the linker figure it out. */
444 return (fixP
->fx_frag
->fr_address
+ fixP
->fx_where
) & ~1;
447 /* Return the bfd reloc type for OPERAND of INSN at fixup FIXP.
448 Returns BFD_RELOC_NONE if no reloc type can be found.
449 *FIXP may be modified if desired. */
451 bfd_reloc_code_real_type
452 md_cgen_lookup_reloc (insn
, operand
, fixP
)
453 const CGEN_INSN
* insn
;
454 const CGEN_OPERAND
* operand
;
457 switch (operand
->type
)
459 case FR30_OPERAND_LABEL9
: fixP
->fx_pcrel
= 1; return BFD_RELOC_FR30_9_PCREL
;
460 case FR30_OPERAND_LABEL12
: fixP
->fx_pcrel
= 1; return BFD_RELOC_FR30_12_PCREL
;
461 case FR30_OPERAND_DISP10
: return BFD_RELOC_FR30_10_IN_8
;
462 case FR30_OPERAND_DISP9
: return BFD_RELOC_FR30_9_IN_8
;
463 case FR30_OPERAND_DISP8
: return BFD_RELOC_FR30_8_IN_8
;
464 case FR30_OPERAND_UDISP6
: return BFD_RELOC_FR30_6_IN_4
;
465 case FR30_OPERAND_I8
: return BFD_RELOC_8
;
466 case FR30_OPERAND_I32
: return BFD_RELOC_FR30_48
;
467 case FR30_OPERAND_I20
: return BFD_RELOC_FR30_20
;
468 default : /* avoid -Wall warning */
472 return BFD_RELOC_NONE
;
475 /* See whether we need to force a relocation into the output file.
476 This is used to force out switch and PC relative relocations when
480 fr30_force_relocation (fix
)
483 if ( fix
->fx_r_type
== BFD_RELOC_VTABLE_INHERIT
484 || fix
->fx_r_type
== BFD_RELOC_VTABLE_ENTRY
)
490 /* Write a value out to the object file, using the appropriate endianness. */
493 md_number_to_chars (buf
, val
, n
)
498 number_to_chars_bigendian (buf
, val
, n
);
501 /* Turn a string in input_line_pointer into a floating point constant of type
502 type, and store the appropriate bytes in *litP. The number of LITTLENUMS
503 emitted is stored in *sizeP . An error message is returned, or NULL on OK.
506 /* Equal to MAX_PRECISION in atof-ieee.c */
507 #define MAX_LITTLENUMS 6
510 md_atof (type
, litP
, sizeP
)
517 LITTLENUM_TYPE words
[MAX_LITTLENUMS
];
537 /* FIXME: Some targets allow other format chars for bigger sizes here. */
541 return _("Bad call to md_atof()");
544 t
= atof_ieee (input_line_pointer
, type
, words
);
546 input_line_pointer
= t
;
547 * sizeP
= prec
* sizeof (LITTLENUM_TYPE
);
549 for (i
= 0; i
< prec
; i
++)
551 md_number_to_chars (litP
, (valueT
) words
[i
],
552 sizeof (LITTLENUM_TYPE
));
553 litP
+= sizeof (LITTLENUM_TYPE
);
559 /* Worker function for fr30_is_colon_insn(). */
561 restore_colon (advance_i_l_p_by
)
562 int advance_i_l_p_by
;
566 /* Restore the colon, and advance input_line_pointer to
567 the end of the new symbol. */
568 * input_line_pointer
= ':';
569 input_line_pointer
+= advance_i_l_p_by
;
570 c
= * input_line_pointer
;
571 * input_line_pointer
= 0;
576 /* Determines if the symbol starting at START and ending in
577 a colon that was at the location pointed to by INPUT_LINE_POINTER
578 (but which has now been replaced bu a NUL) is in fact an
579 LDI:8, LDI:20, LDI:32, CALL:D. JMP:D, RET:D or Bcc:D instruction.
580 If it is, then it restores the colon, advances INPUT_LINE_POINTER
581 to the real end of the instruction/symbol, and returns the character
582 that really terminated the symbol. Otherwise it returns 0. */
584 fr30_is_colon_insn (start
)
587 char * i_l_p
= input_line_pointer
;
589 /* Check to see if the symbol parsed so far is 'ldi' */
590 if ( (start
[0] != 'l' && start
[0] != 'L')
591 || (start
[1] != 'd' && start
[1] != 'D')
592 || (start
[2] != 'i' && start
[2] != 'I')
595 /* Nope - check to see a 'd' follows the colon. */
596 if ( (i_l_p
[1] == 'd' || i_l_p
[1] == 'D')
597 && (i_l_p
[2] == ' ' || i_l_p
[2] == '\t' || i_l_p
[2] == '\n'))
599 /* Yup - it might be delay slot instruction. */
601 static char * delay_insns
[] =
603 "call", "jmp", "ret", "bra", "bno",
604 "beq", "bne", "bc", "bnc", "bn",
605 "bp", "bv", "bnv", "blt", "bge",
606 "ble", "bgt", "bls", "bhi"
609 for (i
= sizeof (delay_insns
) / sizeof (delay_insns
[0]); i
--;)
611 char * insn
= delay_insns
[i
];
612 int len
= strlen (insn
);
614 if (start
[len
] != 0)
618 if (tolower (start
[len
]) != insn
[len
])
622 return restore_colon (1);
626 /* Nope - it is a normal label. */
630 /* Check to see if the text following the colon is '8' */
631 if (i_l_p
[1] == '8' && (i_l_p
[2] == ' ' || i_l_p
[2] == '\t'))
632 return restore_colon (2);
634 /* Check to see if the text following the colon is '20' */
635 else if (i_l_p
[1] == '2' && i_l_p
[2] =='0' && (i_l_p
[3] == ' ' || i_l_p
[3] == '\t'))
636 return restore_colon (3);
638 /* Check to see if the text following the colon is '32' */
639 else if (i_l_p
[1] == '3' && i_l_p
[2] =='2' && (i_l_p
[3] == ' ' || i_l_p
[3] == '\t'))
640 return restore_colon (3);
646 fr30_fix_adjustable (fixP
)
649 if (fixP
->fx_addsy
== NULL
)
653 /* Prevent all adjustments to global symbols. */
654 if (S_IS_EXTERN (fixP
->fx_addsy
))
657 if (S_IS_WEAK (fixP
->fx_addsy
))
661 /* We need the symbol name for the VTABLE entries */
662 if ( fixP
->fx_r_type
== BFD_RELOC_VTABLE_INHERIT
663 || fixP
->fx_r_type
== BFD_RELOC_VTABLE_ENTRY
)