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.
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
46 PARAMS ((CGEN_CPU_DESC
, const CGEN_INSN
*, const char **, CGEN_FIELDS
*));
48 /* -- assembler routines inserted here */
51 /* Handle register lists for LDMx and STMx. */
53 static int parse_register_number
54 PARAMS ((const char **));
55 static const char * parse_register_list
56 PARAMS ((CGEN_CPU_DESC
, const char **, int, unsigned long *, int, int));
57 static const char * parse_low_register_list_ld
58 PARAMS ((CGEN_CPU_DESC
, const char **, int, unsigned long *));
59 static const char * parse_hi_register_list_ld
60 PARAMS ((CGEN_CPU_DESC
, const char **, int, unsigned long *));
61 static const char * parse_low_register_list_st
62 PARAMS ((CGEN_CPU_DESC
, const char **, int, unsigned long *));
63 static const char * parse_hi_register_list_st
64 PARAMS ((CGEN_CPU_DESC
, const char **, int, unsigned long *));
67 parse_register_number (strp
)
71 if (**strp
< '0' || **strp
> '9')
72 return -1; /* error. */
76 if (**strp
>= '0' && **strp
<= '9')
78 regno
= regno
* 10 + (**strp
- '0');
86 parse_register_list (cd
, strp
, opindex
, valuep
, high_low
, load_store
)
87 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED
;
89 int opindex ATTRIBUTE_UNUSED
;
90 unsigned long *valuep
;
91 int high_low
; /* 0 == high, 1 == low */
92 int load_store
; /* 0 == load, 1 == store */
97 while (**strp
&& **strp
!= ')')
99 if (**strp
!= 'R' && **strp
!= 'r')
103 regno
= parse_register_number (strp
);
105 return "Register number is not valid";
106 if (regno
> 7 && !high_low
)
107 return "Register must be between r0 and r7";
108 if (regno
< 8 && high_low
)
109 return "Register must be between r8 and r15";
114 if (load_store
) /* Mask is reversed for store. */
115 *valuep
|= 0x80 >> regno
;
117 *valuep
|= 1 << regno
;
121 if (*(*strp
+ 1) == ')')
127 if (!*strp
|| **strp
!= ')')
128 return "Register list is not valid";
134 parse_low_register_list_ld (cd
, strp
, opindex
, valuep
)
138 unsigned long *valuep
;
140 return parse_register_list (cd
, strp
, opindex
, valuep
, 0/*low*/, 0/*load*/);
144 parse_hi_register_list_ld (cd
, strp
, opindex
, valuep
)
148 unsigned long *valuep
;
150 return parse_register_list (cd
, strp
, opindex
, valuep
, 1/*high*/, 0/*load*/);
154 parse_low_register_list_st (cd
, strp
, opindex
, valuep
)
158 unsigned long *valuep
;
160 return parse_register_list (cd
, strp
, opindex
, valuep
, 0/*low*/, 1/*store*/);
164 parse_hi_register_list_st (cd
, strp
, opindex
, valuep
)
168 unsigned long *valuep
;
170 return parse_register_list (cd
, strp
, opindex
, valuep
, 1/*high*/, 1/*store*/);
175 const char * fr30_cgen_parse_operand
176 PARAMS ((CGEN_CPU_DESC
, int, const char **, CGEN_FIELDS
*));
178 /* Main entry point for operand parsing.
180 This function is basically just a big switch statement. Earlier versions
181 used tables to look up the function to use, but
182 - if the table contains both assembler and disassembler functions then
183 the disassembler contains much of the assembler and vice-versa,
184 - there's a lot of inlining possibilities as things grow,
185 - using a switch statement avoids the function call overhead.
187 This function could be moved into `parse_insn_normal', but keeping it
188 separate makes clear the interface between `parse_insn_normal' and each of
193 fr30_cgen_parse_operand (cd
, opindex
, strp
, fields
)
197 CGEN_FIELDS
* fields
;
199 const char * errmsg
= NULL
;
200 /* Used by scalar operands that still need to be parsed. */
201 long junk ATTRIBUTE_UNUSED
;
205 case FR30_OPERAND_CRI
:
206 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_cr_names
, & fields
->f_CRi
);
208 case FR30_OPERAND_CRJ
:
209 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_cr_names
, & fields
->f_CRj
);
211 case FR30_OPERAND_R13
:
212 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_h_r13
, & junk
);
214 case FR30_OPERAND_R14
:
215 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_h_r14
, & junk
);
217 case FR30_OPERAND_R15
:
218 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_h_r15
, & junk
);
220 case FR30_OPERAND_RI
:
221 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_gr_names
, & fields
->f_Ri
);
223 case FR30_OPERAND_RIC
:
224 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_gr_names
, & fields
->f_Ric
);
226 case FR30_OPERAND_RJ
:
227 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_gr_names
, & fields
->f_Rj
);
229 case FR30_OPERAND_RJC
:
230 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_gr_names
, & fields
->f_Rjc
);
232 case FR30_OPERAND_RS1
:
233 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_dr_names
, & fields
->f_Rs1
);
235 case FR30_OPERAND_RS2
:
236 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_dr_names
, & fields
->f_Rs2
);
238 case FR30_OPERAND_CC
:
239 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_CC
, &fields
->f_cc
);
241 case FR30_OPERAND_CCC
:
242 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_CCC
, &fields
->f_ccc
);
244 case FR30_OPERAND_DIR10
:
245 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_DIR10
, &fields
->f_dir10
);
247 case FR30_OPERAND_DIR8
:
248 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_DIR8
, &fields
->f_dir8
);
250 case FR30_OPERAND_DIR9
:
251 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_DIR9
, &fields
->f_dir9
);
253 case FR30_OPERAND_DISP10
:
254 errmsg
= cgen_parse_signed_integer (cd
, strp
, FR30_OPERAND_DISP10
, &fields
->f_disp10
);
256 case FR30_OPERAND_DISP8
:
257 errmsg
= cgen_parse_signed_integer (cd
, strp
, FR30_OPERAND_DISP8
, &fields
->f_disp8
);
259 case FR30_OPERAND_DISP9
:
260 errmsg
= cgen_parse_signed_integer (cd
, strp
, FR30_OPERAND_DISP9
, &fields
->f_disp9
);
262 case FR30_OPERAND_I20
:
263 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_I20
, &fields
->f_i20
);
265 case FR30_OPERAND_I32
:
266 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_I32
, &fields
->f_i32
);
268 case FR30_OPERAND_I8
:
269 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_I8
, &fields
->f_i8
);
271 case FR30_OPERAND_LABEL12
:
274 errmsg
= cgen_parse_address (cd
, strp
, FR30_OPERAND_LABEL12
, 0, NULL
, & value
);
275 fields
->f_rel12
= value
;
278 case FR30_OPERAND_LABEL9
:
281 errmsg
= cgen_parse_address (cd
, strp
, FR30_OPERAND_LABEL9
, 0, NULL
, & value
);
282 fields
->f_rel9
= value
;
285 case FR30_OPERAND_M4
:
286 errmsg
= cgen_parse_signed_integer (cd
, strp
, FR30_OPERAND_M4
, &fields
->f_m4
);
288 case FR30_OPERAND_PS
:
289 errmsg
= cgen_parse_keyword (cd
, strp
, & fr30_cgen_opval_h_ps
, & junk
);
291 case FR30_OPERAND_REGLIST_HI_LD
:
292 errmsg
= parse_hi_register_list_ld (cd
, strp
, FR30_OPERAND_REGLIST_HI_LD
, &fields
->f_reglist_hi_ld
);
294 case FR30_OPERAND_REGLIST_HI_ST
:
295 errmsg
= parse_hi_register_list_st (cd
, strp
, FR30_OPERAND_REGLIST_HI_ST
, &fields
->f_reglist_hi_st
);
297 case FR30_OPERAND_REGLIST_LOW_LD
:
298 errmsg
= parse_low_register_list_ld (cd
, strp
, FR30_OPERAND_REGLIST_LOW_LD
, &fields
->f_reglist_low_ld
);
300 case FR30_OPERAND_REGLIST_LOW_ST
:
301 errmsg
= parse_low_register_list_st (cd
, strp
, FR30_OPERAND_REGLIST_LOW_ST
, &fields
->f_reglist_low_st
);
303 case FR30_OPERAND_S10
:
304 errmsg
= cgen_parse_signed_integer (cd
, strp
, FR30_OPERAND_S10
, &fields
->f_s10
);
306 case FR30_OPERAND_U10
:
307 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_U10
, &fields
->f_u10
);
309 case FR30_OPERAND_U4
:
310 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_U4
, &fields
->f_u4
);
312 case FR30_OPERAND_U4C
:
313 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_U4C
, &fields
->f_u4c
);
315 case FR30_OPERAND_U8
:
316 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_U8
, &fields
->f_u8
);
318 case FR30_OPERAND_UDISP6
:
319 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, FR30_OPERAND_UDISP6
, &fields
->f_udisp6
);
323 /* xgettext:c-format */
324 fprintf (stderr
, _("Unrecognized field %d while parsing.\n"), opindex
);
331 cgen_parse_fn
* const fr30_cgen_parse_handlers
[] =
337 fr30_cgen_init_asm (cd
)
340 fr30_cgen_init_opcode_table (cd
);
341 fr30_cgen_init_ibld_table (cd
);
342 cd
->parse_handlers
= & fr30_cgen_parse_handlers
[0];
343 cd
->parse_operand
= fr30_cgen_parse_operand
;
349 Regex construction routine.
351 This translates an opcode syntax string into a regex string,
352 by replacing any non-character syntax element (such as an
353 opcode) with the pattern '.*'
355 It then compiles the regex and stores it in the opcode, for
356 later use by fr30_cgen_assemble_insn
358 Returns NULL for success, an error message for failure. */
361 fr30_cgen_build_insn_regex (insn
)
364 CGEN_OPCODE
*opc
= (CGEN_OPCODE
*) CGEN_INSN_OPCODE (insn
);
365 const char *mnem
= CGEN_INSN_MNEMONIC (insn
);
367 char rxbuf
[CGEN_MAX_RX_ELEMENTS
];
369 const CGEN_SYNTAX_CHAR_TYPE
*syn
;
372 syn
= CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc
));
374 /* Mnemonics come first in the syntax string */
375 if (! CGEN_SYNTAX_MNEMONIC_P (* syn
)) return "missing mnemonic in syntax string";
378 /* copy the literal mnemonic out of the insn */
379 memset (rx
, 0, CGEN_MAX_RX_ELEMENTS
);
380 mnem_len
= strlen(mnem
);
381 memcpy (rx
, mnem
, mnem_len
);
384 /* copy any remaining literals from the syntax string into the rx */
385 for(; * syn
!= 0 && rx
< rxbuf
+ (CGEN_MAX_RX_ELEMENTS
- 9); ++syn
, ++rx
)
387 if (CGEN_SYNTAX_CHAR_P (* syn
))
389 char tmp
= CGEN_SYNTAX_CHAR (* syn
);
392 /* escape any regex metacharacters in the syntax */
393 case '.': case '[': case '\\':
394 case '*': case '^': case '$':
396 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
397 case '?': case '{': case '}':
398 case '(': case ')': case '*':
399 case '|': case '+': case ']':
405 /* insert syntax char into rx */
410 /* replace non-syntax fields with globs */
416 /* trailing whitespace ok */
423 /* but anchor it after that */
427 CGEN_INSN_RX (insn
) = xmalloc (sizeof (regex_t
));
428 reg_err
= regcomp ((regex_t
*) CGEN_INSN_RX (insn
), rxbuf
, REG_NOSUB
|REG_ICASE
);
435 regerror (reg_err
, (regex_t
*) CGEN_INSN_RX (insn
), msg
, 80);
436 regfree ((regex_t
*) CGEN_INSN_RX (insn
));
437 free (CGEN_INSN_RX (insn
));
438 (CGEN_INSN_RX (insn
)) = NULL
;
444 /* Default insn parser.
446 The syntax string is scanned and operands are parsed and stored in FIELDS.
447 Relocs are queued as we go via other callbacks.
449 ??? Note that this is currently an all-or-nothing parser. If we fail to
450 parse the instruction, we return 0 and the caller will start over from
451 the beginning. Backtracking will be necessary in parsing subexpressions,
452 but that can be handled there. Not handling backtracking here may get
453 expensive in the case of the m68k. Deal with later.
455 Returns NULL for success, an error message for failure.
459 parse_insn_normal (cd
, insn
, strp
, fields
)
461 const CGEN_INSN
*insn
;
465 /* ??? Runtime added insns not handled yet. */
466 const CGEN_SYNTAX
*syntax
= CGEN_INSN_SYNTAX (insn
);
467 const char *str
= *strp
;
470 const CGEN_SYNTAX_CHAR_TYPE
* syn
;
471 #ifdef CGEN_MNEMONIC_OPERANDS
476 /* For now we assume the mnemonic is first (there are no leading operands).
477 We can parse it without needing to set up operand parsing.
478 GAS's input scrubber will ensure mnemonics are lowercase, but we may
479 not be called from GAS. */
480 p
= CGEN_INSN_MNEMONIC (insn
);
481 while (*p
&& tolower (*p
) == tolower (*str
))
485 return _("unrecognized instruction");
487 #ifndef CGEN_MNEMONIC_OPERANDS
488 if (* str
&& !isspace (* str
))
489 return _("unrecognized instruction");
492 CGEN_INIT_PARSE (cd
);
493 cgen_init_parse_operand (cd
);
494 #ifdef CGEN_MNEMONIC_OPERANDS
498 /* We don't check for (*str != '\0') here because we want to parse
499 any trailing fake arguments in the syntax string. */
500 syn
= CGEN_SYNTAX_STRING (syntax
);
502 /* Mnemonics come first for now, ensure valid string. */
503 if (! CGEN_SYNTAX_MNEMONIC_P (* syn
))
510 /* Non operand chars must match exactly. */
511 if (CGEN_SYNTAX_CHAR_P (* syn
))
513 /* FIXME: While we allow for non-GAS callers above, we assume the
514 first char after the mnemonic part is a space. */
515 /* FIXME: We also take inappropriate advantage of the fact that
516 GAS's input scrubber will remove extraneous blanks. */
517 if (tolower (*str
) == tolower (CGEN_SYNTAX_CHAR (* syn
)))
519 #ifdef CGEN_MNEMONIC_OPERANDS
520 if (CGEN_SYNTAX_CHAR(* syn
) == ' ')
528 /* Syntax char didn't match. Can't be this insn. */
529 static char msg
[80];
530 /* xgettext:c-format */
531 sprintf (msg
, _("syntax error (expected char `%c', found `%c')"),
532 CGEN_SYNTAX_CHAR(*syn
), *str
);
537 /* Ran out of input. */
538 static char msg
[80];
539 /* xgettext:c-format */
540 sprintf (msg
, _("syntax error (expected char `%c', found end of instruction)"),
541 CGEN_SYNTAX_CHAR(*syn
));
547 /* We have an operand of some sort. */
548 errmsg
= fr30_cgen_parse_operand (cd
, CGEN_SYNTAX_FIELD (*syn
),
553 /* Done with this operand, continue with next one. */
557 /* If we're at the end of the syntax string, we're done. */
560 /* FIXME: For the moment we assume a valid `str' can only contain
561 blanks now. IE: We needn't try again with a longer version of
562 the insn and it is assumed that longer versions of insns appear
563 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
564 while (isspace (* str
))
568 return _("junk at end of line"); /* FIXME: would like to include `str' */
573 /* We couldn't parse it. */
574 return _("unrecognized instruction");
578 This routine is called for each instruction to be assembled.
579 STR points to the insn to be assembled.
580 We assume all necessary tables have been initialized.
581 The assembled instruction, less any fixups, is stored in BUF.
582 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
583 still needs to be converted to target byte order, otherwise BUF is an array
584 of bytes in target byte order.
585 The result is a pointer to the insn's entry in the opcode table,
586 or NULL if an error occured (an error message will have already been
589 Note that when processing (non-alias) macro-insns,
590 this function recurses.
592 ??? It's possible to make this cpu-independent.
593 One would have to deal with a few minor things.
594 At this point in time doing so would be more of a curiosity than useful
595 [for example this file isn't _that_ big], but keeping the possibility in
596 mind helps keep the design clean. */
599 fr30_cgen_assemble_insn (cd
, str
, fields
, buf
, errmsg
)
603 CGEN_INSN_BYTES_PTR buf
;
607 CGEN_INSN_LIST
*ilist
;
608 const char *parse_errmsg
= NULL
;
609 const char *insert_errmsg
= NULL
;
610 int recognized_mnemonic
= 0;
612 /* Skip leading white space. */
613 while (isspace (* str
))
616 /* The instructions are stored in hashed lists.
617 Get the first in the list. */
618 ilist
= CGEN_ASM_LOOKUP_INSN (cd
, str
);
620 /* Keep looking until we find a match. */
623 for ( ; ilist
!= NULL
; ilist
= CGEN_ASM_NEXT_INSN (ilist
))
625 const CGEN_INSN
*insn
= ilist
->insn
;
626 recognized_mnemonic
= 1;
628 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
629 /* not usually needed as unsupported opcodes shouldn't be in the hash lists */
630 /* Is this insn supported by the selected cpu? */
631 if (! fr30_cgen_insn_supported (cd
, insn
))
635 /* If the RELAX attribute is set, this is an insn that shouldn't be
636 chosen immediately. Instead, it is used during assembler/linker
637 relaxation if possible. */
638 if (CGEN_INSN_ATTR_VALUE (insn
, CGEN_INSN_RELAX
) != 0)
643 /* skip this insn if str doesn't look right lexically */
644 if (CGEN_INSN_RX (insn
) != NULL
&&
645 regexec ((regex_t
*) CGEN_INSN_RX (insn
), str
, 0, NULL
, 0) == REG_NOMATCH
)
648 /* Allow parse/insert handlers to obtain length of insn. */
649 CGEN_FIELDS_BITSIZE (fields
) = CGEN_INSN_BITSIZE (insn
);
651 parse_errmsg
= CGEN_PARSE_FN (cd
, insn
) (cd
, insn
, & str
, fields
);
652 if (parse_errmsg
!= NULL
)
655 /* ??? 0 is passed for `pc' */
656 insert_errmsg
= CGEN_INSERT_FN (cd
, insn
) (cd
, insn
, fields
, buf
,
658 if (insert_errmsg
!= NULL
)
661 /* It is up to the caller to actually output the insn and any
667 static char errbuf
[150];
668 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
669 const char *tmp_errmsg
;
671 /* If requesting verbose error messages, use insert_errmsg.
672 Failing that, use parse_errmsg */
673 tmp_errmsg
= (insert_errmsg
? insert_errmsg
:
674 parse_errmsg
? parse_errmsg
:
675 recognized_mnemonic
? _("unrecognized form of instruction") :
676 _("unrecognized instruction"));
678 if (strlen (start
) > 50)
679 /* xgettext:c-format */
680 sprintf (errbuf
, "%s `%.50s...'", tmp_errmsg
, start
);
682 /* xgettext:c-format */
683 sprintf (errbuf
, "%s `%.50s'", tmp_errmsg
, start
);
685 if (strlen (start
) > 50)
686 /* xgettext:c-format */
687 sprintf (errbuf
, _("bad instruction `%.50s...'"), start
);
689 /* xgettext:c-format */
690 sprintf (errbuf
, _("bad instruction `%.50s'"), start
);
698 #if 0 /* This calls back to GAS which we can't do without care. */
700 /* Record each member of OPVALS in the assembler's symbol table.
701 This lets GAS parse registers for us.
702 ??? Interesting idea but not currently used. */
704 /* Record each member of OPVALS in the assembler's symbol table.
705 FIXME: Not currently used. */
708 fr30_cgen_asm_hash_keywords (cd
, opvals
)
710 CGEN_KEYWORD
*opvals
;
712 CGEN_KEYWORD_SEARCH search
= cgen_keyword_search_init (opvals
, NULL
);
713 const CGEN_KEYWORD_ENTRY
* ke
;
715 while ((ke
= cgen_keyword_search_next (& search
)) != NULL
)
717 #if 0 /* Unnecessary, should be done in the search routine. */
718 if (! fr30_cgen_opval_supported (ke
))
721 cgen_asm_record_register (cd
, ke
->name
, ke
->value
);