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 "m32r-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 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
225 m32r_cgen_parse_operand (cd, opindex, strp, fields)
229 CGEN_FIELDS * fields;
231 const char * errmsg = NULL;
232 /* Used by scalar operands that still need to be parsed. */
233 long junk ATTRIBUTE_UNUSED;
237 case M32R_OPERAND_ACC :
238 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_h_accums, & fields->f_acc);
240 case M32R_OPERAND_ACCD :
241 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_h_accums, & fields->f_accd);
243 case M32R_OPERAND_ACCS :
244 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_h_accums, & fields->f_accs);
246 case M32R_OPERAND_DCR :
247 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_cr_names, & fields->f_r1);
249 case M32R_OPERAND_DISP16 :
252 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_DISP16, 0, NULL, & value);
253 fields->f_disp16 = value;
256 case M32R_OPERAND_DISP24 :
259 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_DISP24, 0, NULL, & value);
260 fields->f_disp24 = value;
263 case M32R_OPERAND_DISP8 :
266 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_DISP8, 0, NULL, & value);
267 fields->f_disp8 = value;
270 case M32R_OPERAND_DR :
271 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r1);
273 case M32R_OPERAND_HASH :
274 errmsg = parse_hash (cd, strp, M32R_OPERAND_HASH, &junk);
276 case M32R_OPERAND_HI16 :
277 errmsg = parse_hi16 (cd, strp, M32R_OPERAND_HI16, &fields->f_hi16);
279 case M32R_OPERAND_IMM1 :
280 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_IMM1, &fields->f_imm1);
282 case M32R_OPERAND_SCR :
283 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_cr_names, & fields->f_r2);
285 case M32R_OPERAND_SIMM16 :
286 errmsg = cgen_parse_signed_integer (cd, strp, M32R_OPERAND_SIMM16, &fields->f_simm16);
288 case M32R_OPERAND_SIMM8 :
289 errmsg = cgen_parse_signed_integer (cd, strp, M32R_OPERAND_SIMM8, &fields->f_simm8);
291 case M32R_OPERAND_SLO16 :
292 errmsg = parse_slo16 (cd, strp, M32R_OPERAND_SLO16, &fields->f_simm16);
294 case M32R_OPERAND_SR :
295 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r2);
297 case M32R_OPERAND_SRC1 :
298 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r1);
300 case M32R_OPERAND_SRC2 :
301 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r2);
303 case M32R_OPERAND_UIMM16 :
304 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM16, &fields->f_uimm16);
306 case M32R_OPERAND_UIMM24 :
309 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_UIMM24, 0, NULL, & value);
310 fields->f_uimm24 = value;
313 case M32R_OPERAND_UIMM4 :
314 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM4, &fields->f_uimm4);
316 case M32R_OPERAND_UIMM5 :
317 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM5, &fields->f_uimm5);
319 case M32R_OPERAND_ULO16 :
320 errmsg = parse_ulo16 (cd, strp, M32R_OPERAND_ULO16, &fields->f_uimm16);
324 /* xgettext:c-format */
325 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
332 cgen_parse_fn * const m32r_cgen_parse_handlers[] =
338 m32r_cgen_init_asm (cd)
341 m32r_cgen_init_opcode_table (cd);
342 m32r_cgen_init_ibld_table (cd);
343 cd->parse_handlers = & m32r_cgen_parse_handlers[0];
344 cd->parse_operand = m32r_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 m32r_cgen_assemble_insn
358 Returns NULL for success, an error message for failure. */
361 m32r_cgen_build_insn_regex (insn)
364 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
365 const char *mnem = CGEN_INSN_MNEMONIC (insn);
366 char rxbuf[CGEN_MAX_RX_ELEMENTS];
368 const CGEN_SYNTAX_CHAR_TYPE *syn;
371 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
373 /* Mnemonics come first in the syntax string. */
374 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
375 return _("missing mnemonic in syntax string");
378 /* Generate a case sensitive regular expression that emulates case
379 insensitive matching in the "C" locale. We cannot generate a case
380 insensitive regular expression because in Turkish locales, 'i' and 'I'
381 are not equal modulo case conversion. */
383 /* Copy the literal mnemonic out of the insn. */
384 for (; *mnem; mnem++)
399 /* Copy any remaining literals from the syntax string into the rx. */
400 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
402 if (CGEN_SYNTAX_CHAR_P (* syn))
404 char c = CGEN_SYNTAX_CHAR (* syn);
408 /* Escape any regex metacharacters in the syntax. */
409 case '.': case '[': case '\\':
410 case '*': case '^': case '$':
412 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
413 case '?': case '{': case '}':
414 case '(': case ')': case '*':
415 case '|': case '+': case ']':
436 /* Replace non-syntax fields with globs. */
442 /* Trailing whitespace ok. */
449 /* But anchor it after that. */
453 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
454 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
462 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
463 regfree ((regex_t *) CGEN_INSN_RX (insn));
464 free (CGEN_INSN_RX (insn));
465 (CGEN_INSN_RX (insn)) = NULL;
471 /* Default insn parser.
473 The syntax string is scanned and operands are parsed and stored in FIELDS.
474 Relocs are queued as we go via other callbacks.
476 ??? Note that this is currently an all-or-nothing parser. If we fail to
477 parse the instruction, we return 0 and the caller will start over from
478 the beginning. Backtracking will be necessary in parsing subexpressions,
479 but that can be handled there. Not handling backtracking here may get
480 expensive in the case of the m68k. Deal with later.
482 Returns NULL for success, an error message for failure. */
485 parse_insn_normal (cd, insn, strp, fields)
487 const CGEN_INSN *insn;
491 /* ??? Runtime added insns not handled yet. */
492 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
493 const char *str = *strp;
496 const CGEN_SYNTAX_CHAR_TYPE * syn;
497 #ifdef CGEN_MNEMONIC_OPERANDS
502 /* For now we assume the mnemonic is first (there are no leading operands).
503 We can parse it without needing to set up operand parsing.
504 GAS's input scrubber will ensure mnemonics are lowercase, but we may
505 not be called from GAS. */
506 p = CGEN_INSN_MNEMONIC (insn);
507 while (*p && TOLOWER (*p) == TOLOWER (*str))
511 return _("unrecognized instruction");
513 #ifndef CGEN_MNEMONIC_OPERANDS
514 if (* str && ! ISSPACE (* str))
515 return _("unrecognized instruction");
518 CGEN_INIT_PARSE (cd);
519 cgen_init_parse_operand (cd);
520 #ifdef CGEN_MNEMONIC_OPERANDS
524 /* We don't check for (*str != '\0') here because we want to parse
525 any trailing fake arguments in the syntax string. */
526 syn = CGEN_SYNTAX_STRING (syntax);
528 /* Mnemonics come first for now, ensure valid string. */
529 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
536 /* Non operand chars must match exactly. */
537 if (CGEN_SYNTAX_CHAR_P (* syn))
539 /* FIXME: While we allow for non-GAS callers above, we assume the
540 first char after the mnemonic part is a space. */
541 /* FIXME: We also take inappropriate advantage of the fact that
542 GAS's input scrubber will remove extraneous blanks. */
543 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
545 #ifdef CGEN_MNEMONIC_OPERANDS
546 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
554 /* Syntax char didn't match. Can't be this insn. */
555 static char msg [80];
557 /* xgettext:c-format */
558 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
559 CGEN_SYNTAX_CHAR(*syn), *str);
564 /* Ran out of input. */
565 static char msg [80];
567 /* xgettext:c-format */
568 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
569 CGEN_SYNTAX_CHAR(*syn));
575 /* We have an operand of some sort. */
576 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
581 /* Done with this operand, continue with next one. */
585 /* If we're at the end of the syntax string, we're done. */
588 /* FIXME: For the moment we assume a valid `str' can only contain
589 blanks now. IE: We needn't try again with a longer version of
590 the insn and it is assumed that longer versions of insns appear
591 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
592 while (ISSPACE (* str))
596 return _("junk at end of line"); /* FIXME: would like to include `str' */
601 /* We couldn't parse it. */
602 return _("unrecognized instruction");
606 This routine is called for each instruction to be assembled.
607 STR points to the insn to be assembled.
608 We assume all necessary tables have been initialized.
609 The assembled instruction, less any fixups, is stored in BUF.
610 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
611 still needs to be converted to target byte order, otherwise BUF is an array
612 of bytes in target byte order.
613 The result is a pointer to the insn's entry in the opcode table,
614 or NULL if an error occured (an error message will have already been
617 Note that when processing (non-alias) macro-insns,
618 this function recurses.
620 ??? It's possible to make this cpu-independent.
621 One would have to deal with a few minor things.
622 At this point in time doing so would be more of a curiosity than useful
623 [for example this file isn't _that_ big], but keeping the possibility in
624 mind helps keep the design clean. */
627 m32r_cgen_assemble_insn (cd, str, fields, buf, errmsg)
631 CGEN_INSN_BYTES_PTR buf;
635 CGEN_INSN_LIST *ilist;
636 const char *parse_errmsg = NULL;
637 const char *insert_errmsg = NULL;
638 int recognized_mnemonic = 0;
640 /* Skip leading white space. */
641 while (ISSPACE (* str))
644 /* The instructions are stored in hashed lists.
645 Get the first in the list. */
646 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
648 /* Keep looking until we find a match. */
650 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
652 const CGEN_INSN *insn = ilist->insn;
653 recognized_mnemonic = 1;
655 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
656 /* Not usually needed as unsupported opcodes
657 shouldn't be in the hash lists. */
658 /* Is this insn supported by the selected cpu? */
659 if (! m32r_cgen_insn_supported (cd, insn))
662 /* If the RELAXED attribute is set, this is an insn that shouldn't be
663 chosen immediately. Instead, it is used during assembler/linker
664 relaxation if possible. */
665 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
670 /* Skip this insn if str doesn't look right lexically. */
671 if (CGEN_INSN_RX (insn) != NULL &&
672 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
675 /* Allow parse/insert handlers to obtain length of insn. */
676 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
678 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
679 if (parse_errmsg != NULL)
682 /* ??? 0 is passed for `pc'. */
683 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
685 if (insert_errmsg != NULL)
688 /* It is up to the caller to actually output the insn and any
694 static char errbuf[150];
695 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
696 const char *tmp_errmsg;
698 /* If requesting verbose error messages, use insert_errmsg.
699 Failing that, use parse_errmsg. */
700 tmp_errmsg = (insert_errmsg ? insert_errmsg :
701 parse_errmsg ? parse_errmsg :
702 recognized_mnemonic ?
703 _("unrecognized form of instruction") :
704 _("unrecognized instruction"));
706 if (strlen (start) > 50)
707 /* xgettext:c-format */
708 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
710 /* xgettext:c-format */
711 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
713 if (strlen (start) > 50)
714 /* xgettext:c-format */
715 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
717 /* xgettext:c-format */
718 sprintf (errbuf, _("bad instruction `%.50s'"), start);
726 #if 0 /* This calls back to GAS which we can't do without care. */
728 /* Record each member of OPVALS in the assembler's symbol table.
729 This lets GAS parse registers for us.
730 ??? Interesting idea but not currently used. */
732 /* Record each member of OPVALS in the assembler's symbol table.
733 FIXME: Not currently used. */
736 m32r_cgen_asm_hash_keywords (cd, opvals)
738 CGEN_KEYWORD *opvals;
740 CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL);
741 const CGEN_KEYWORD_ENTRY * ke;
743 while ((ke = cgen_keyword_search_next (& search)) != NULL)
745 #if 0 /* Unnecessary, should be done in the search routine. */
746 if (! m32r_cgen_opval_supported (ke))
749 cgen_asm_record_register (cd, ke->name, ke->value);