1 /* Assembler interface for targets using CGEN. -*- C -*-
2 CGEN: Cpu tools GENerator
4 THIS FILE IS MACHINE GENERATED WITH CGEN.
5 - the resultant file is machine generated, cgen-asm.in isn't
7 Copyright 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
9 This file is part of the GNU Binutils and GDB, the GNU debugger.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2, or (at your option)
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program; if not, write to the Free Software Foundation, Inc.,
23 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
31 #include "safe-ctype.h"
34 #include "fr30-desc.h"
38 #include "libiberty.h"
41 #define min(a,b) ((a) < (b) ? (a) : (b))
43 #define max(a,b) ((a) > (b) ? (a) : (b))
45 static const char * parse_insn_normal
PARAMS ((CGEN_CPU_DESC
, const CGEN_INSN
*, const char **, CGEN_FIELDS
*));
46 static int parse_register_number
PARAMS ((const char **));
47 static const char * parse_register_list
PARAMS ((CGEN_CPU_DESC
, const char **, int, unsigned long *, int, int));
48 static const char * parse_low_register_list_ld
PARAMS ((CGEN_CPU_DESC
, const char **, int, unsigned long *));
49 static const char * parse_hi_register_list_ld
PARAMS ((CGEN_CPU_DESC
, const char **, int, unsigned long *));
50 static const char * parse_low_register_list_st
PARAMS ((CGEN_CPU_DESC
, const char **, int, unsigned long *));
51 static const char * parse_hi_register_list_st
PARAMS ((CGEN_CPU_DESC
, const char **, int, unsigned long *));
52 const char * fr30_cgen_parse_operand
PARAMS ((CGEN_CPU_DESC
, int, const char **, CGEN_FIELDS
*));
54 /* -- assembler routines inserted here */
57 /* Handle register lists for LDMx and STMx */
60 parse_register_number (strp
)
64 if (**strp
< '0' || **strp
> '9')
65 return -1; /* error */
69 if (**strp
>= '0' && **strp
<= '9')
71 regno
= regno
* 10 + (**strp
- '0');
79 parse_register_list (cd
, strp
, opindex
, valuep
, high_low
, load_store
)
80 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED
;
82 int opindex ATTRIBUTE_UNUSED
;
83 unsigned long *valuep
;
84 int high_low
; /* 0 == high, 1 == low */
85 int load_store
; /* 0 == load, 1 == store */
89 while (**strp
&& **strp
!= ')')
91 if (**strp
!= 'R' && **strp
!= 'r')
95 regno
= parse_register_number (strp
);
97 return "Register number is not valid";
98 if (regno
> 7 && !high_low
)
99 return "Register must be between r0 and r7";
100 if (regno
< 8 && high_low
)
101 return "Register must be between r8 and r15";
106 if (load_store
) /* mask is reversed for store */
107 *valuep
|= 0x80 >> regno
;
109 *valuep
|= 1 << regno
;
113 if (*(*strp
+ 1) == ')')
119 if (!*strp
|| **strp
!= ')')
120 return "Register list is not valid";
126 parse_low_register_list_ld (cd
, strp
, opindex
, valuep
)
130 unsigned long *valuep
;
132 return parse_register_list (cd
, strp
, opindex
, valuep
, 0/*low*/, 0/*load*/);
136 parse_hi_register_list_ld (cd
, strp
, opindex
, valuep
)
140 unsigned long *valuep
;
142 return parse_register_list (cd
, strp
, opindex
, valuep
, 1/*high*/, 0/*load*/);
146 parse_low_register_list_st (cd
, strp
, opindex
, valuep
)
150 unsigned long *valuep
;
152 return parse_register_list (cd
, strp
, opindex
, valuep
, 0/*low*/, 1/*store*/);
156 parse_hi_register_list_st (cd
, strp
, opindex
, valuep
)
160 unsigned long *valuep
;
162 return parse_register_list (cd
, strp
, opindex
, valuep
, 1/*high*/, 1/*store*/);
167 /* Main entry point for operand parsing.
169 This function is basically just a big switch statement. Earlier versions
170 used tables to look up the function to use, but
171 - if the table contains both assembler and disassembler functions then
172 the disassembler contains much of the assembler and vice-versa,
173 - there's a lot of inlining possibilities as things grow,
174 - using a switch statement avoids the function call overhead.
176 This function could be moved into `parse_insn_normal', but keeping it
177 separate makes clear the interface between `parse_insn_normal' and each of
181 fr30_cgen_parse_operand (cd
, opindex
, strp
, fields
)
185 CGEN_FIELDS
* fields
;
187 const char * errmsg
= NULL
;
188 /* Used by scalar operands that still need to be parsed. */
193 case FR30_OPERAND_CRI
:
194 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_cr_names
, & fields
->f_CRi
);
196 case FR30_OPERAND_CRJ
:
197 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_cr_names
, & fields
->f_CRj
);
199 case FR30_OPERAND_R13
:
200 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_h_r13
, & junk
);
202 case FR30_OPERAND_R14
:
203 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_h_r14
, & junk
);
205 case FR30_OPERAND_R15
:
206 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_h_r15
, & junk
);
208 case FR30_OPERAND_RI
:
209 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_gr_names
, & fields
->f_Ri
);
211 case FR30_OPERAND_RIC
:
212 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_gr_names
, & fields
->f_Ric
);
214 case FR30_OPERAND_RJ
:
215 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_gr_names
, & fields
->f_Rj
);
217 case FR30_OPERAND_RJC
:
218 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_gr_names
, & fields
->f_Rjc
);
220 case FR30_OPERAND_RS1
:
221 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_dr_names
, & fields
->f_Rs1
);
223 case FR30_OPERAND_RS2
:
224 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_dr_names
, & fields
->f_Rs2
);
226 case FR30_OPERAND_CC
:
227 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_CC
, &fields
->f_cc
);
229 case FR30_OPERAND_CCC
:
230 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_CCC
, &fields
->f_ccc
);
232 case FR30_OPERAND_DIR10
:
233 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_DIR10
, &fields
->f_dir10
);
235 case FR30_OPERAND_DIR8
:
236 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_DIR8
, &fields
->f_dir8
);
238 case FR30_OPERAND_DIR9
:
239 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_DIR9
, &fields
->f_dir9
);
241 case FR30_OPERAND_DISP10
:
242 errmsg
= cgen_parse_signed_integer (cd
, strp
, FR30_OPERAND_DISP10
, &fields
->f_disp10
);
244 case FR30_OPERAND_DISP8
:
245 errmsg
= cgen_parse_signed_integer (cd
, strp
, FR30_OPERAND_DISP8
, &fields
->f_disp8
);
247 case FR30_OPERAND_DISP9
:
248 errmsg
= cgen_parse_signed_integer (cd
, strp
, FR30_OPERAND_DISP9
, &fields
->f_disp9
);
250 case FR30_OPERAND_I20
:
251 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_I20
, &fields
->f_i20
);
253 case FR30_OPERAND_I32
:
254 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_I32
, &fields
->f_i32
);
256 case FR30_OPERAND_I8
:
257 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_I8
, &fields
->f_i8
);
259 case FR30_OPERAND_LABEL12
:
262 errmsg
= cgen_parse_address (cd
, strp
, FR30_OPERAND_LABEL12
, 0, NULL
, & value
);
263 fields
->f_rel12
= value
;
266 case FR30_OPERAND_LABEL9
:
269 errmsg
= cgen_parse_address (cd
, strp
, FR30_OPERAND_LABEL9
, 0, NULL
, & value
);
270 fields
->f_rel9
= value
;
273 case FR30_OPERAND_M4
:
274 errmsg
= cgen_parse_signed_integer (cd
, strp
, FR30_OPERAND_M4
, &fields
->f_m4
);
276 case FR30_OPERAND_PS
:
277 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_h_ps
, & junk
);
279 case FR30_OPERAND_REGLIST_HI_LD
:
280 errmsg
= parse_hi_register_list_ld (cd
, strp
, FR30_OPERAND_REGLIST_HI_LD
, &fields
->f_reglist_hi_ld
);
282 case FR30_OPERAND_REGLIST_HI_ST
:
283 errmsg
= parse_hi_register_list_st (cd
, strp
, FR30_OPERAND_REGLIST_HI_ST
, &fields
->f_reglist_hi_st
);
285 case FR30_OPERAND_REGLIST_LOW_LD
:
286 errmsg
= parse_low_register_list_ld (cd
, strp
, FR30_OPERAND_REGLIST_LOW_LD
, &fields
->f_reglist_low_ld
);
288 case FR30_OPERAND_REGLIST_LOW_ST
:
289 errmsg
= parse_low_register_list_st (cd
, strp
, FR30_OPERAND_REGLIST_LOW_ST
, &fields
->f_reglist_low_st
);
291 case FR30_OPERAND_S10
:
292 errmsg
= cgen_parse_signed_integer (cd
, strp
, FR30_OPERAND_S10
, &fields
->f_s10
);
294 case FR30_OPERAND_U10
:
295 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_U10
, &fields
->f_u10
);
297 case FR30_OPERAND_U4
:
298 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_U4
, &fields
->f_u4
);
300 case FR30_OPERAND_U4C
:
301 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_U4C
, &fields
->f_u4c
);
303 case FR30_OPERAND_U8
:
304 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_U8
, &fields
->f_u8
);
306 case FR30_OPERAND_UDISP6
:
307 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_UDISP6
, &fields
->f_udisp6
);
311 /* xgettext:c-format */
312 fprintf (stderr
, _("Unrecognized field %d while parsing.\n"), opindex
);
319 cgen_parse_fn
* const fr30_cgen_parse_handlers
[] =
325 fr30_cgen_init_asm (cd
)
328 fr30_cgen_init_opcode_table (cd
);
329 fr30_cgen_init_ibld_table (cd
);
330 cd
->parse_handlers
= & fr30_cgen_parse_handlers
[0];
331 cd
->parse_operand
= fr30_cgen_parse_operand
;
337 Regex construction routine.
339 This translates an opcode syntax string into a regex string,
340 by replacing any non-character syntax element (such as an
341 opcode) with the pattern '.*'
343 It then compiles the regex and stores it in the opcode, for
344 later use by fr30_cgen_assemble_insn
346 returns NULL for success, an error message for failure
350 fr30_cgen_build_insn_regex (insn
)
353 CGEN_OPCODE
*opc
= (CGEN_OPCODE
*) CGEN_INSN_OPCODE (insn
);
354 const char *mnem
= CGEN_INSN_MNEMONIC (insn
);
356 char rxbuf
[CGEN_MAX_RX_ELEMENTS
];
358 const CGEN_SYNTAX_CHAR_TYPE
*syn
;
361 syn
= CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc
));
363 /* Mnemonics come first in the syntax string */
364 if (! CGEN_SYNTAX_MNEMONIC_P (* syn
)) return "missing mnemonic in syntax string";
367 /* copy the literal mnemonic out of the insn */
368 memset (rx
, 0, CGEN_MAX_RX_ELEMENTS
);
369 mnem_len
= strlen(mnem
);
370 memcpy (rx
, mnem
, mnem_len
);
373 /* copy any remaining literals from the syntax string into the rx */
374 for(; * syn
!= 0 && rx
< rxbuf
+ (CGEN_MAX_RX_ELEMENTS
- 9); ++syn
, ++rx
)
376 if (CGEN_SYNTAX_CHAR_P (* syn
))
378 char tmp
= CGEN_SYNTAX_CHAR (* syn
);
381 /* escape any regex metacharacters in the syntax */
382 case '.': case '[': case '\\':
383 case '*': case '^': case '$':
385 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
386 case '?': case '{': case '}':
387 case '(': case ')': case '*':
388 case '|': case '+': case ']':
394 /* insert syntax char into rx */
399 /* replace non-syntax fields with globs */
405 /* trailing whitespace ok */
412 /* but anchor it after that */
416 CGEN_INSN_RX (insn
) = xmalloc (sizeof (regex_t
));
417 reg_err
= regcomp ((regex_t
*) CGEN_INSN_RX (insn
), rxbuf
, REG_NOSUB
|REG_ICASE
);
424 regerror (reg_err
, (regex_t
*) CGEN_INSN_RX (insn
), msg
, 80);
425 regfree ((regex_t
*) CGEN_INSN_RX (insn
));
426 free (CGEN_INSN_RX (insn
));
427 (CGEN_INSN_RX (insn
)) = NULL
;
433 /* Default insn parser.
435 The syntax string is scanned and operands are parsed and stored in FIELDS.
436 Relocs are queued as we go via other callbacks.
438 ??? Note that this is currently an all-or-nothing parser. If we fail to
439 parse the instruction, we return 0 and the caller will start over from
440 the beginning. Backtracking will be necessary in parsing subexpressions,
441 but that can be handled there. Not handling backtracking here may get
442 expensive in the case of the m68k. Deal with later.
444 Returns NULL for success, an error message for failure.
448 parse_insn_normal (cd
, insn
, strp
, fields
)
450 const CGEN_INSN
*insn
;
454 /* ??? Runtime added insns not handled yet. */
455 const CGEN_SYNTAX
*syntax
= CGEN_INSN_SYNTAX (insn
);
456 const char *str
= *strp
;
459 const CGEN_SYNTAX_CHAR_TYPE
* syn
;
460 #ifdef CGEN_MNEMONIC_OPERANDS
465 /* For now we assume the mnemonic is first (there are no leading operands).
466 We can parse it without needing to set up operand parsing.
467 GAS's input scrubber will ensure mnemonics are lowercase, but we may
468 not be called from GAS. */
469 p
= CGEN_INSN_MNEMONIC (insn
);
470 while (*p
&& TOLOWER (*p
) == TOLOWER (*str
))
474 return _("unrecognized instruction");
476 #ifndef CGEN_MNEMONIC_OPERANDS
477 if (* str
&& !ISSPACE (* str
))
478 return _("unrecognized instruction");
481 CGEN_INIT_PARSE (cd
);
482 cgen_init_parse_operand (cd
);
483 #ifdef CGEN_MNEMONIC_OPERANDS
487 /* We don't check for (*str != '\0') here because we want to parse
488 any trailing fake arguments in the syntax string. */
489 syn
= CGEN_SYNTAX_STRING (syntax
);
491 /* Mnemonics come first for now, ensure valid string. */
492 if (! CGEN_SYNTAX_MNEMONIC_P (* syn
))
499 /* Non operand chars must match exactly. */
500 if (CGEN_SYNTAX_CHAR_P (* syn
))
502 /* FIXME: While we allow for non-GAS callers above, we assume the
503 first char after the mnemonic part is a space. */
504 /* FIXME: We also take inappropriate advantage of the fact that
505 GAS's input scrubber will remove extraneous blanks. */
506 if (TOLOWER (*str
) == TOLOWER (CGEN_SYNTAX_CHAR (* syn
)))
508 #ifdef CGEN_MNEMONIC_OPERANDS
509 if (CGEN_SYNTAX_CHAR(* syn
) == ' ')
517 /* Syntax char didn't match. Can't be this insn. */
518 static char msg
[80];
519 /* xgettext:c-format */
520 sprintf (msg
, _("syntax error (expected char `%c', found `%c')"),
521 CGEN_SYNTAX_CHAR(*syn
), *str
);
526 /* Ran out of input. */
527 static char msg
[80];
528 /* xgettext:c-format */
529 sprintf (msg
, _("syntax error (expected char `%c', found end of instruction)"),
530 CGEN_SYNTAX_CHAR(*syn
));
536 /* We have an operand of some sort. */
537 errmsg
= fr30_cgen_parse_operand (cd
, CGEN_SYNTAX_FIELD (*syn
),
542 /* Done with this operand, continue with next one. */
546 /* If we're at the end of the syntax string, we're done. */
549 /* FIXME: For the moment we assume a valid `str' can only contain
550 blanks now. IE: We needn't try again with a longer version of
551 the insn and it is assumed that longer versions of insns appear
552 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
553 while (ISSPACE (* str
))
557 return _("junk at end of line"); /* FIXME: would like to include `str' */
562 /* We couldn't parse it. */
563 return _("unrecognized instruction");
567 This routine is called for each instruction to be assembled.
568 STR points to the insn to be assembled.
569 We assume all necessary tables have been initialized.
570 The assembled instruction, less any fixups, is stored in BUF.
571 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
572 still needs to be converted to target byte order, otherwise BUF is an array
573 of bytes in target byte order.
574 The result is a pointer to the insn's entry in the opcode table,
575 or NULL if an error occured (an error message will have already been
578 Note that when processing (non-alias) macro-insns,
579 this function recurses.
581 ??? It's possible to make this cpu-independent.
582 One would have to deal with a few minor things.
583 At this point in time doing so would be more of a curiosity than useful
584 [for example this file isn't _that_ big], but keeping the possibility in
585 mind helps keep the design clean. */
588 fr30_cgen_assemble_insn (cd
, str
, fields
, buf
, errmsg
)
592 CGEN_INSN_BYTES_PTR buf
;
596 CGEN_INSN_LIST
*ilist
;
597 const char *parse_errmsg
= NULL
;
598 const char *insert_errmsg
= NULL
;
599 int recognized_mnemonic
= 0;
601 /* Skip leading white space. */
602 while (ISSPACE (* str
))
605 /* The instructions are stored in hashed lists.
606 Get the first in the list. */
607 ilist
= CGEN_ASM_LOOKUP_INSN (cd
, str
);
609 /* Keep looking until we find a match. */
612 for ( ; ilist
!= NULL
; ilist
= CGEN_ASM_NEXT_INSN (ilist
))
614 const CGEN_INSN
*insn
= ilist
->insn
;
615 recognized_mnemonic
= 1;
617 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
618 /* not usually needed as unsupported opcodes shouldn't be in the hash lists */
619 /* Is this insn supported by the selected cpu? */
620 if (! fr30_cgen_insn_supported (cd
, insn
))
624 /* If the RELAX attribute is set, this is an insn that shouldn't be
625 chosen immediately. Instead, it is used during assembler/linker
626 relaxation if possible. */
627 if (CGEN_INSN_ATTR_VALUE (insn
, CGEN_INSN_RELAX
) != 0)
632 /* skip this insn if str doesn't look right lexically */
633 if (CGEN_INSN_RX (insn
) != NULL
&&
634 regexec ((regex_t
*) CGEN_INSN_RX (insn
), str
, 0, NULL
, 0) == REG_NOMATCH
)
637 /* Allow parse/insert handlers to obtain length of insn. */
638 CGEN_FIELDS_BITSIZE (fields
) = CGEN_INSN_BITSIZE (insn
);
640 parse_errmsg
= CGEN_PARSE_FN (cd
, insn
) (cd
, insn
, & str
, fields
);
641 if (parse_errmsg
!= NULL
)
644 /* ??? 0 is passed for `pc' */
645 insert_errmsg
= CGEN_INSERT_FN (cd
, insn
) (cd
, insn
, fields
, buf
,
647 if (insert_errmsg
!= NULL
)
650 /* It is up to the caller to actually output the insn and any
656 static char errbuf
[150];
657 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
658 const char *tmp_errmsg
;
660 /* If requesting verbose error messages, use insert_errmsg.
661 Failing that, use parse_errmsg */
662 tmp_errmsg
= (insert_errmsg
? insert_errmsg
:
663 parse_errmsg
? parse_errmsg
:
664 recognized_mnemonic
? _("unrecognized form of instruction") :
665 _("unrecognized instruction"));
667 if (strlen (start
) > 50)
668 /* xgettext:c-format */
669 sprintf (errbuf
, "%s `%.50s...'", tmp_errmsg
, start
);
671 /* xgettext:c-format */
672 sprintf (errbuf
, "%s `%.50s'", tmp_errmsg
, start
);
674 if (strlen (start
) > 50)
675 /* xgettext:c-format */
676 sprintf (errbuf
, _("bad instruction `%.50s...'"), start
);
678 /* xgettext:c-format */
679 sprintf (errbuf
, _("bad instruction `%.50s'"), start
);
687 #if 0 /* This calls back to GAS which we can't do without care. */
689 /* Record each member of OPVALS in the assembler's symbol table.
690 This lets GAS parse registers for us.
691 ??? Interesting idea but not currently used. */
693 /* Record each member of OPVALS in the assembler's symbol table.
694 FIXME: Not currently used. */
697 fr30_cgen_asm_hash_keywords (cd
, opvals
)
699 CGEN_KEYWORD
*opvals
;
701 CGEN_KEYWORD_SEARCH search
= cgen_keyword_search_init (opvals
, NULL
);
702 const CGEN_KEYWORD_ENTRY
* ke
;
704 while ((ke
= cgen_keyword_search_next (& search
)) != NULL
)
706 #if 0 /* Unnecessary, should be done in the search routine. */
707 if (! fr30_cgen_opval_supported (ke
))
710 cgen_asm_record_register (cd
, ke
->name
, ke
->value
);