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 "m32r-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 static const char * parse_hash
52 PARAMS ((CGEN_CPU_DESC
, const char **, int, unsigned long *));
53 static const char * parse_hi16
54 PARAMS ((CGEN_CPU_DESC
, const char **, int, unsigned long *));
55 static const char * parse_slo16
56 PARAMS ((CGEN_CPU_DESC
, const char **, int, long *));
57 static const char * parse_ulo16
58 PARAMS ((CGEN_CPU_DESC
, const char **, int, unsigned long *));
60 /* Handle '#' prefixes (i.e. skip over them). */
63 parse_hash (cd
, strp
, opindex
, valuep
)
64 CGEN_CPU_DESC cd ATTRIBUTE_UNUSED
;
66 int opindex ATTRIBUTE_UNUSED
;
67 unsigned long *valuep ATTRIBUTE_UNUSED
;
74 /* Handle shigh(), high(). */
77 parse_hi16 (cd
, strp
, opindex
, valuep
)
81 unsigned long *valuep
;
84 enum cgen_parse_operand_result result_type
;
90 if (strncasecmp (*strp
, "high(", 5) == 0)
93 errmsg
= cgen_parse_address (cd
, strp
, opindex
, BFD_RELOC_M32R_HI16_ULO
,
94 &result_type
, &value
);
99 && result_type
== CGEN_PARSE_OPERAND_RESULT_NUMBER
)
104 else if (strncasecmp (*strp
, "shigh(", 6) == 0)
107 errmsg
= cgen_parse_address (cd
, strp
, opindex
, BFD_RELOC_M32R_HI16_SLO
,
108 &result_type
, &value
);
110 return "missing `)'";
113 && result_type
== CGEN_PARSE_OPERAND_RESULT_NUMBER
)
114 value
= (value
>> 16) + (value
& 0x8000 ? 1 : 0);
119 return cgen_parse_unsigned_integer (cd
, strp
, opindex
, valuep
);
122 /* Handle low() in a signed context. Also handle sda().
123 The signedness of the value doesn't matter to low(), but this also
124 handles the case where low() isn't present. */
127 parse_slo16 (cd
, strp
, opindex
, valuep
)
134 enum cgen_parse_operand_result result_type
;
140 if (strncasecmp (*strp
, "low(", 4) == 0)
143 errmsg
= cgen_parse_address (cd
, strp
, opindex
, BFD_RELOC_M32R_LO16
,
144 &result_type
, &value
);
146 return "missing `)'";
149 && result_type
== CGEN_PARSE_OPERAND_RESULT_NUMBER
)
155 if (strncasecmp (*strp
, "sda(", 4) == 0)
158 errmsg
= cgen_parse_address (cd
, strp
, opindex
, BFD_RELOC_M32R_SDA16
,
161 return "missing `)'";
167 return cgen_parse_signed_integer (cd
, strp
, opindex
, valuep
);
170 /* Handle low() in an unsigned context.
171 The signedness of the value doesn't matter to low(), but this also
172 handles the case where low() isn't present. */
175 parse_ulo16 (cd
, strp
, opindex
, valuep
)
179 unsigned long *valuep
;
182 enum cgen_parse_operand_result result_type
;
188 if (strncasecmp (*strp
, "low(", 4) == 0)
191 errmsg
= cgen_parse_address (cd
, strp
, opindex
, BFD_RELOC_M32R_LO16
,
192 &result_type
, &value
);
194 return "missing `)'";
197 && result_type
== CGEN_PARSE_OPERAND_RESULT_NUMBER
)
203 return cgen_parse_unsigned_integer (cd
, strp
, opindex
, valuep
);
208 const char * m32r_cgen_parse_operand
209 PARAMS ((CGEN_CPU_DESC
, int, const char **, CGEN_FIELDS
*));
211 /* Main entry point for operand parsing.
213 This function is basically just a big switch statement. Earlier versions
214 used tables to look up the function to use, but
215 - if the table contains both assembler and disassembler functions then
216 the disassembler contains much of the assembler and vice-versa,
217 - there's a lot of inlining possibilities as things grow,
218 - using a switch statement avoids the function call overhead.
220 This function could be moved into `parse_insn_normal', but keeping it
221 separate makes clear the interface between `parse_insn_normal' and each of
226 m32r_cgen_parse_operand (cd
, opindex
, strp
, fields
)
230 CGEN_FIELDS
* fields
;
232 const char * errmsg
= NULL
;
233 /* Used by scalar operands that still need to be parsed. */
234 long junk ATTRIBUTE_UNUSED
;
238 case M32R_OPERAND_ACC
:
239 errmsg
= cgen_parse_keyword (cd
, strp
, & m32r_cgen_opval_h_accums
, & fields
->f_acc
);
241 case M32R_OPERAND_ACCD
:
242 errmsg
= cgen_parse_keyword (cd
, strp
, & m32r_cgen_opval_h_accums
, & fields
->f_accd
);
244 case M32R_OPERAND_ACCS
:
245 errmsg
= cgen_parse_keyword (cd
, strp
, & m32r_cgen_opval_h_accums
, & fields
->f_accs
);
247 case M32R_OPERAND_DCR
:
248 errmsg
= cgen_parse_keyword (cd
, strp
, & m32r_cgen_opval_cr_names
, & fields
->f_r1
);
250 case M32R_OPERAND_DISP16
:
253 errmsg
= cgen_parse_address (cd
, strp
, M32R_OPERAND_DISP16
, 0, NULL
, & value
);
254 fields
->f_disp16
= value
;
257 case M32R_OPERAND_DISP24
:
260 errmsg
= cgen_parse_address (cd
, strp
, M32R_OPERAND_DISP24
, 0, NULL
, & value
);
261 fields
->f_disp24
= value
;
264 case M32R_OPERAND_DISP8
:
267 errmsg
= cgen_parse_address (cd
, strp
, M32R_OPERAND_DISP8
, 0, NULL
, & value
);
268 fields
->f_disp8
= value
;
271 case M32R_OPERAND_DR
:
272 errmsg
= cgen_parse_keyword (cd
, strp
, & m32r_cgen_opval_gr_names
, & fields
->f_r1
);
274 case M32R_OPERAND_HASH
:
275 errmsg
= parse_hash (cd
, strp
, M32R_OPERAND_HASH
, &junk
);
277 case M32R_OPERAND_HI16
:
278 errmsg
= parse_hi16 (cd
, strp
, M32R_OPERAND_HI16
, &fields
->f_hi16
);
280 case M32R_OPERAND_IMM1
:
281 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, M32R_OPERAND_IMM1
, &fields
->f_imm1
);
283 case M32R_OPERAND_SCR
:
284 errmsg
= cgen_parse_keyword (cd
, strp
, & m32r_cgen_opval_cr_names
, & fields
->f_r2
);
286 case M32R_OPERAND_SIMM16
:
287 errmsg
= cgen_parse_signed_integer (cd
, strp
, M32R_OPERAND_SIMM16
, &fields
->f_simm16
);
289 case M32R_OPERAND_SIMM8
:
290 errmsg
= cgen_parse_signed_integer (cd
, strp
, M32R_OPERAND_SIMM8
, &fields
->f_simm8
);
292 case M32R_OPERAND_SLO16
:
293 errmsg
= parse_slo16 (cd
, strp
, M32R_OPERAND_SLO16
, &fields
->f_simm16
);
295 case M32R_OPERAND_SR
:
296 errmsg
= cgen_parse_keyword (cd
, strp
, & m32r_cgen_opval_gr_names
, & fields
->f_r2
);
298 case M32R_OPERAND_SRC1
:
299 errmsg
= cgen_parse_keyword (cd
, strp
, & m32r_cgen_opval_gr_names
, & fields
->f_r1
);
301 case M32R_OPERAND_SRC2
:
302 errmsg
= cgen_parse_keyword (cd
, strp
, & m32r_cgen_opval_gr_names
, & fields
->f_r2
);
304 case M32R_OPERAND_UIMM16
:
305 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, M32R_OPERAND_UIMM16
, &fields
->f_uimm16
);
307 case M32R_OPERAND_UIMM24
:
310 errmsg
= cgen_parse_address (cd
, strp
, M32R_OPERAND_UIMM24
, 0, NULL
, & value
);
311 fields
->f_uimm24
= value
;
314 case M32R_OPERAND_UIMM4
:
315 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, M32R_OPERAND_UIMM4
, &fields
->f_uimm4
);
317 case M32R_OPERAND_UIMM5
:
318 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, M32R_OPERAND_UIMM5
, &fields
->f_uimm5
);
320 case M32R_OPERAND_ULO16
:
321 errmsg
= parse_ulo16 (cd
, strp
, M32R_OPERAND_ULO16
, &fields
->f_uimm16
);
325 /* xgettext:c-format */
326 fprintf (stderr
, _("Unrecognized field %d while parsing.\n"), opindex
);
333 cgen_parse_fn
* const m32r_cgen_parse_handlers
[] =
339 m32r_cgen_init_asm (cd
)
342 m32r_cgen_init_opcode_table (cd
);
343 m32r_cgen_init_ibld_table (cd
);
344 cd
->parse_handlers
= & m32r_cgen_parse_handlers
[0];
345 cd
->parse_operand
= m32r_cgen_parse_operand
;
351 Regex construction routine.
353 This translates an opcode syntax string into a regex string,
354 by replacing any non-character syntax element (such as an
355 opcode) with the pattern '.*'
357 It then compiles the regex and stores it in the opcode, for
358 later use by m32r_cgen_assemble_insn
360 Returns NULL for success, an error message for failure. */
363 m32r_cgen_build_insn_regex (insn
)
366 CGEN_OPCODE
*opc
= (CGEN_OPCODE
*) CGEN_INSN_OPCODE (insn
);
367 const char *mnem
= CGEN_INSN_MNEMONIC (insn
);
369 char rxbuf
[CGEN_MAX_RX_ELEMENTS
];
371 const CGEN_SYNTAX_CHAR_TYPE
*syn
;
374 syn
= CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc
));
376 /* Mnemonics come first in the syntax string */
377 if (! CGEN_SYNTAX_MNEMONIC_P (* syn
)) return "missing mnemonic in syntax string";
380 /* copy the literal mnemonic out of the insn */
381 memset (rx
, 0, CGEN_MAX_RX_ELEMENTS
);
382 mnem_len
= strlen(mnem
);
383 memcpy (rx
, mnem
, mnem_len
);
386 /* copy any remaining literals from the syntax string into the rx */
387 for(; * syn
!= 0 && rx
< rxbuf
+ (CGEN_MAX_RX_ELEMENTS
- 9); ++syn
, ++rx
)
389 if (CGEN_SYNTAX_CHAR_P (* syn
))
391 char tmp
= CGEN_SYNTAX_CHAR (* syn
);
394 /* escape any regex metacharacters in the syntax */
395 case '.': case '[': case '\\':
396 case '*': case '^': case '$':
398 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
399 case '?': case '{': case '}':
400 case '(': case ')': case '*':
401 case '|': case '+': case ']':
407 /* insert syntax char into rx */
412 /* replace non-syntax fields with globs */
418 /* trailing whitespace ok */
425 /* but anchor it after that */
429 CGEN_INSN_RX (insn
) = xmalloc (sizeof (regex_t
));
430 reg_err
= regcomp ((regex_t
*) CGEN_INSN_RX (insn
), rxbuf
, REG_NOSUB
|REG_ICASE
);
437 regerror (reg_err
, (regex_t
*) CGEN_INSN_RX (insn
), msg
, 80);
438 regfree ((regex_t
*) CGEN_INSN_RX (insn
));
439 free (CGEN_INSN_RX (insn
));
440 (CGEN_INSN_RX (insn
)) = NULL
;
446 /* Default insn parser.
448 The syntax string is scanned and operands are parsed and stored in FIELDS.
449 Relocs are queued as we go via other callbacks.
451 ??? Note that this is currently an all-or-nothing parser. If we fail to
452 parse the instruction, we return 0 and the caller will start over from
453 the beginning. Backtracking will be necessary in parsing subexpressions,
454 but that can be handled there. Not handling backtracking here may get
455 expensive in the case of the m68k. Deal with later.
457 Returns NULL for success, an error message for failure.
461 parse_insn_normal (cd
, insn
, strp
, fields
)
463 const CGEN_INSN
*insn
;
467 /* ??? Runtime added insns not handled yet. */
468 const CGEN_SYNTAX
*syntax
= CGEN_INSN_SYNTAX (insn
);
469 const char *str
= *strp
;
472 const CGEN_SYNTAX_CHAR_TYPE
* syn
;
473 #ifdef CGEN_MNEMONIC_OPERANDS
478 /* For now we assume the mnemonic is first (there are no leading operands).
479 We can parse it without needing to set up operand parsing.
480 GAS's input scrubber will ensure mnemonics are lowercase, but we may
481 not be called from GAS. */
482 p
= CGEN_INSN_MNEMONIC (insn
);
483 while (*p
&& tolower (*p
) == tolower (*str
))
487 return _("unrecognized instruction");
489 #ifndef CGEN_MNEMONIC_OPERANDS
490 if (* str
&& !isspace (* str
))
491 return _("unrecognized instruction");
494 CGEN_INIT_PARSE (cd
);
495 cgen_init_parse_operand (cd
);
496 #ifdef CGEN_MNEMONIC_OPERANDS
500 /* We don't check for (*str != '\0') here because we want to parse
501 any trailing fake arguments in the syntax string. */
502 syn
= CGEN_SYNTAX_STRING (syntax
);
504 /* Mnemonics come first for now, ensure valid string. */
505 if (! CGEN_SYNTAX_MNEMONIC_P (* syn
))
512 /* Non operand chars must match exactly. */
513 if (CGEN_SYNTAX_CHAR_P (* syn
))
515 /* FIXME: While we allow for non-GAS callers above, we assume the
516 first char after the mnemonic part is a space. */
517 /* FIXME: We also take inappropriate advantage of the fact that
518 GAS's input scrubber will remove extraneous blanks. */
519 if (tolower (*str
) == tolower (CGEN_SYNTAX_CHAR (* syn
)))
521 #ifdef CGEN_MNEMONIC_OPERANDS
522 if (CGEN_SYNTAX_CHAR(* syn
) == ' ')
530 /* Syntax char didn't match. Can't be this insn. */
531 static char msg
[80];
532 /* xgettext:c-format */
533 sprintf (msg
, _("syntax error (expected char `%c', found `%c')"),
534 CGEN_SYNTAX_CHAR(*syn
), *str
);
539 /* Ran out of input. */
540 static char msg
[80];
541 /* xgettext:c-format */
542 sprintf (msg
, _("syntax error (expected char `%c', found end of instruction)"),
543 CGEN_SYNTAX_CHAR(*syn
));
549 /* We have an operand of some sort. */
550 errmsg
= m32r_cgen_parse_operand (cd
, CGEN_SYNTAX_FIELD (*syn
),
555 /* Done with this operand, continue with next one. */
559 /* If we're at the end of the syntax string, we're done. */
562 /* FIXME: For the moment we assume a valid `str' can only contain
563 blanks now. IE: We needn't try again with a longer version of
564 the insn and it is assumed that longer versions of insns appear
565 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
566 while (isspace (* str
))
570 return _("junk at end of line"); /* FIXME: would like to include `str' */
575 /* We couldn't parse it. */
576 return _("unrecognized instruction");
580 This routine is called for each instruction to be assembled.
581 STR points to the insn to be assembled.
582 We assume all necessary tables have been initialized.
583 The assembled instruction, less any fixups, is stored in BUF.
584 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
585 still needs to be converted to target byte order, otherwise BUF is an array
586 of bytes in target byte order.
587 The result is a pointer to the insn's entry in the opcode table,
588 or NULL if an error occured (an error message will have already been
591 Note that when processing (non-alias) macro-insns,
592 this function recurses.
594 ??? It's possible to make this cpu-independent.
595 One would have to deal with a few minor things.
596 At this point in time doing so would be more of a curiosity than useful
597 [for example this file isn't _that_ big], but keeping the possibility in
598 mind helps keep the design clean. */
601 m32r_cgen_assemble_insn (cd
, str
, fields
, buf
, errmsg
)
605 CGEN_INSN_BYTES_PTR buf
;
609 CGEN_INSN_LIST
*ilist
;
610 const char *parse_errmsg
= NULL
;
611 const char *insert_errmsg
= NULL
;
612 int recognized_mnemonic
= 0;
614 /* Skip leading white space. */
615 while (isspace (* str
))
618 /* The instructions are stored in hashed lists.
619 Get the first in the list. */
620 ilist
= CGEN_ASM_LOOKUP_INSN (cd
, str
);
622 /* Keep looking until we find a match. */
625 for ( ; ilist
!= NULL
; ilist
= CGEN_ASM_NEXT_INSN (ilist
))
627 const CGEN_INSN
*insn
= ilist
->insn
;
628 recognized_mnemonic
= 1;
630 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
631 /* not usually needed as unsupported opcodes shouldn't be in the hash lists */
632 /* Is this insn supported by the selected cpu? */
633 if (! m32r_cgen_insn_supported (cd
, insn
))
637 /* If the RELAX attribute is set, this is an insn that shouldn't be
638 chosen immediately. Instead, it is used during assembler/linker
639 relaxation if possible. */
640 if (CGEN_INSN_ATTR_VALUE (insn
, CGEN_INSN_RELAX
) != 0)
645 /* skip this insn if str doesn't look right lexically */
646 if (CGEN_INSN_RX (insn
) != NULL
&&
647 regexec ((regex_t
*) CGEN_INSN_RX (insn
), str
, 0, NULL
, 0) == REG_NOMATCH
)
650 /* Allow parse/insert handlers to obtain length of insn. */
651 CGEN_FIELDS_BITSIZE (fields
) = CGEN_INSN_BITSIZE (insn
);
653 parse_errmsg
= CGEN_PARSE_FN (cd
, insn
) (cd
, insn
, & str
, fields
);
654 if (parse_errmsg
!= NULL
)
657 /* ??? 0 is passed for `pc' */
658 insert_errmsg
= CGEN_INSERT_FN (cd
, insn
) (cd
, insn
, fields
, buf
,
660 if (insert_errmsg
!= NULL
)
663 /* It is up to the caller to actually output the insn and any
669 static char errbuf
[150];
670 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
671 const char *tmp_errmsg
;
673 /* If requesting verbose error messages, use insert_errmsg.
674 Failing that, use parse_errmsg */
675 tmp_errmsg
= (insert_errmsg
? insert_errmsg
:
676 parse_errmsg
? parse_errmsg
:
677 recognized_mnemonic
? _("unrecognized form of instruction") :
678 _("unrecognized instruction"));
680 if (strlen (start
) > 50)
681 /* xgettext:c-format */
682 sprintf (errbuf
, "%s `%.50s...'", tmp_errmsg
, start
);
684 /* xgettext:c-format */
685 sprintf (errbuf
, "%s `%.50s'", tmp_errmsg
, start
);
687 if (strlen (start
) > 50)
688 /* xgettext:c-format */
689 sprintf (errbuf
, _("bad instruction `%.50s...'"), start
);
691 /* xgettext:c-format */
692 sprintf (errbuf
, _("bad instruction `%.50s'"), start
);
700 #if 0 /* This calls back to GAS which we can't do without care. */
702 /* Record each member of OPVALS in the assembler's symbol table.
703 This lets GAS parse registers for us.
704 ??? Interesting idea but not currently used. */
706 /* Record each member of OPVALS in the assembler's symbol table.
707 FIXME: Not currently used. */
710 m32r_cgen_asm_hash_keywords (cd
, opvals
)
712 CGEN_KEYWORD
*opvals
;
714 CGEN_KEYWORD_SEARCH search
= cgen_keyword_search_init (opvals
, NULL
);
715 const CGEN_KEYWORD_ENTRY
* ke
;
717 while ((ke
= cgen_keyword_search_next (& search
)) != NULL
)
719 #if 0 /* Unnecessary, should be done in the search routine. */
720 if (! m32r_cgen_opval_supported (ke
))
723 cgen_asm_record_register (cd
, ke
->name
, ke
->value
);