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.
33 #include "fr30-desc.h"
37 #include "libiberty.h"
38 #include "safe-ctype.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;
348 /* Regex construction routine.
350 This translates an opcode syntax string into a regex string,
351 by replacing any non-character syntax element (such as an
352 opcode) with the pattern '.*'
354 It then compiles the regex and stores it in the opcode, for
355 later use by fr30_cgen_assemble_insn
357 Returns NULL for success, an error message for failure. */
360 fr30_cgen_build_insn_regex (insn)
363 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
364 const char *mnem = CGEN_INSN_MNEMONIC (insn);
365 char rxbuf[CGEN_MAX_RX_ELEMENTS];
367 const CGEN_SYNTAX_CHAR_TYPE *syn;
370 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
372 /* Mnemonics come first in the syntax string. */
373 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
374 return _("missing mnemonic in syntax string");
377 /* Generate a case sensitive regular expression that emulates case
378 insensitive matching in the "C" locale. We cannot generate a case
379 insensitive regular expression because in Turkish locales, 'i' and 'I'
380 are not equal modulo case conversion. */
382 /* Copy the literal mnemonic out of the insn. */
383 for (; *mnem; mnem++)
398 /* Copy any remaining literals from the syntax string into the rx. */
399 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
401 if (CGEN_SYNTAX_CHAR_P (* syn))
403 char c = CGEN_SYNTAX_CHAR (* syn);
407 /* Escape any regex metacharacters in the syntax. */
408 case '.': case '[': case '\\':
409 case '*': case '^': case '$':
411 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
412 case '?': case '{': case '}':
413 case '(': case ')': case '*':
414 case '|': case '+': case ']':
435 /* Replace non-syntax fields with globs. */
441 /* Trailing whitespace ok. */
448 /* But anchor it after that. */
452 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
453 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
461 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
462 regfree ((regex_t *) CGEN_INSN_RX (insn));
463 free (CGEN_INSN_RX (insn));
464 (CGEN_INSN_RX (insn)) = NULL;
470 /* Default insn parser.
472 The syntax string is scanned and operands are parsed and stored in FIELDS.
473 Relocs are queued as we go via other callbacks.
475 ??? Note that this is currently an all-or-nothing parser. If we fail to
476 parse the instruction, we return 0 and the caller will start over from
477 the beginning. Backtracking will be necessary in parsing subexpressions,
478 but that can be handled there. Not handling backtracking here may get
479 expensive in the case of the m68k. Deal with later.
481 Returns NULL for success, an error message for failure. */
484 parse_insn_normal (cd, insn, strp, fields)
486 const CGEN_INSN *insn;
490 /* ??? Runtime added insns not handled yet. */
491 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
492 const char *str = *strp;
495 const CGEN_SYNTAX_CHAR_TYPE * syn;
496 #ifdef CGEN_MNEMONIC_OPERANDS
501 /* For now we assume the mnemonic is first (there are no leading operands).
502 We can parse it without needing to set up operand parsing.
503 GAS's input scrubber will ensure mnemonics are lowercase, but we may
504 not be called from GAS. */
505 p = CGEN_INSN_MNEMONIC (insn);
506 while (*p && TOLOWER (*p) == TOLOWER (*str))
510 return _("unrecognized instruction");
512 #ifndef CGEN_MNEMONIC_OPERANDS
513 if (* str && ! ISSPACE (* str))
514 return _("unrecognized instruction");
517 CGEN_INIT_PARSE (cd);
518 cgen_init_parse_operand (cd);
519 #ifdef CGEN_MNEMONIC_OPERANDS
523 /* We don't check for (*str != '\0') here because we want to parse
524 any trailing fake arguments in the syntax string. */
525 syn = CGEN_SYNTAX_STRING (syntax);
527 /* Mnemonics come first for now, ensure valid string. */
528 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
535 /* Non operand chars must match exactly. */
536 if (CGEN_SYNTAX_CHAR_P (* syn))
538 /* FIXME: While we allow for non-GAS callers above, we assume the
539 first char after the mnemonic part is a space. */
540 /* FIXME: We also take inappropriate advantage of the fact that
541 GAS's input scrubber will remove extraneous blanks. */
542 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
544 #ifdef CGEN_MNEMONIC_OPERANDS
545 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
553 /* Syntax char didn't match. Can't be this insn. */
554 static char msg [80];
556 /* xgettext:c-format */
557 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
558 CGEN_SYNTAX_CHAR(*syn), *str);
563 /* Ran out of input. */
564 static char msg [80];
566 /* xgettext:c-format */
567 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
568 CGEN_SYNTAX_CHAR(*syn));
574 /* We have an operand of some sort. */
575 errmsg = fr30_cgen_parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
580 /* Done with this operand, continue with next one. */
584 /* If we're at the end of the syntax string, we're done. */
587 /* FIXME: For the moment we assume a valid `str' can only contain
588 blanks now. IE: We needn't try again with a longer version of
589 the insn and it is assumed that longer versions of insns appear
590 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
591 while (ISSPACE (* str))
595 return _("junk at end of line"); /* FIXME: would like to include `str' */
600 /* We couldn't parse it. */
601 return _("unrecognized instruction");
605 This routine is called for each instruction to be assembled.
606 STR points to the insn to be assembled.
607 We assume all necessary tables have been initialized.
608 The assembled instruction, less any fixups, is stored in BUF.
609 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
610 still needs to be converted to target byte order, otherwise BUF is an array
611 of bytes in target byte order.
612 The result is a pointer to the insn's entry in the opcode table,
613 or NULL if an error occured (an error message will have already been
616 Note that when processing (non-alias) macro-insns,
617 this function recurses.
619 ??? It's possible to make this cpu-independent.
620 One would have to deal with a few minor things.
621 At this point in time doing so would be more of a curiosity than useful
622 [for example this file isn't _that_ big], but keeping the possibility in
623 mind helps keep the design clean. */
626 fr30_cgen_assemble_insn (cd, str, fields, buf, errmsg)
630 CGEN_INSN_BYTES_PTR buf;
634 CGEN_INSN_LIST *ilist;
635 const char *parse_errmsg = NULL;
636 const char *insert_errmsg = NULL;
637 int recognized_mnemonic = 0;
639 /* Skip leading white space. */
640 while (ISSPACE (* str))
643 /* The instructions are stored in hashed lists.
644 Get the first in the list. */
645 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
647 /* Keep looking until we find a match. */
649 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
651 const CGEN_INSN *insn = ilist->insn;
652 recognized_mnemonic = 1;
654 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
655 /* Not usually needed as unsupported opcodes
656 shouldn't be in the hash lists. */
657 /* Is this insn supported by the selected cpu? */
658 if (! fr30_cgen_insn_supported (cd, insn))
661 /* If the RELAX attribute is set, this is an insn that shouldn't be
662 chosen immediately. Instead, it is used during assembler/linker
663 relaxation if possible. */
664 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX) != 0)
669 /* Skip this insn if str doesn't look right lexically. */
670 if (CGEN_INSN_RX (insn) != NULL &&
671 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
674 /* Allow parse/insert handlers to obtain length of insn. */
675 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
677 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
678 if (parse_errmsg != NULL)
681 /* ??? 0 is passed for `pc'. */
682 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
684 if (insert_errmsg != NULL)
687 /* It is up to the caller to actually output the insn and any
693 static char errbuf[150];
694 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
695 const char *tmp_errmsg;
697 /* If requesting verbose error messages, use insert_errmsg.
698 Failing that, use parse_errmsg. */
699 tmp_errmsg = (insert_errmsg ? insert_errmsg :
700 parse_errmsg ? parse_errmsg :
701 recognized_mnemonic ?
702 _("unrecognized form of instruction") :
703 _("unrecognized instruction"));
705 if (strlen (start) > 50)
706 /* xgettext:c-format */
707 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
709 /* xgettext:c-format */
710 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
712 if (strlen (start) > 50)
713 /* xgettext:c-format */
714 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
716 /* xgettext:c-format */
717 sprintf (errbuf, _("bad instruction `%.50s'"), start);
725 #if 0 /* This calls back to GAS which we can't do without care. */
727 /* Record each member of OPVALS in the assembler's symbol table.
728 This lets GAS parse registers for us.
729 ??? Interesting idea but not currently used. */
731 /* Record each member of OPVALS in the assembler's symbol table.
732 FIXME: Not currently used. */
735 fr30_cgen_asm_hash_keywords (cd, opvals)
737 CGEN_KEYWORD *opvals;
739 CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL);
740 const CGEN_KEYWORD_ENTRY * ke;
742 while ((ke = cgen_keyword_search_next (& search)) != NULL)
744 #if 0 /* Unnecessary, should be done in the search routine. */
745 if (! fr30_cgen_opval_supported (ke))
748 cgen_asm_record_register (cd, ke->name, ke->value);