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 "xstormy16-desc.h"
34 #include "xstormy16-opc.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 (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *);
48 /* -- assembler routines inserted here. */
51 static const char * parse_mem8
52 PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *));
53 static const char * parse_small_immediate
54 PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *));
55 static const char * parse_immediate16
56 PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *));
58 /* The machine-independent code doesn't know how to disambiguate
62 where 'foo' is a label. This helps it out. */
65 parse_mem8 (cd, strp, opindex, valuep)
69 unsigned long *valuep;
73 const char *s = *strp;
75 if (s[1] == '-' && s[2] == '-')
76 return _("Bad register in preincrement");
78 while (ISALNUM (*++s))
80 if (s[0] == '+' && s[1] == '+' && (s[2] == ')' || s[2] == ','))
81 return _("Bad register in postincrement");
82 if (s[0] == ',' || s[0] == ')')
83 return _("Bad register name");
85 else if (cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names,
87 return _("Label conflicts with register name");
88 else if (strncasecmp (*strp, "rx,", 3) == 0
89 || strncasecmp (*strp, "rxl,", 3) == 0
90 || strncasecmp (*strp, "rxh,", 3) == 0)
91 return _("Label conflicts with `Rx'");
92 else if (**strp == '#')
93 return _("Bad immediate expression");
95 return cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
98 /* For the add and subtract instructions, there are two immediate forms,
99 one for small operands and one for large ones. We want to use
100 the small one when possible, but we do not want to generate relocs
101 of the small size. This is somewhat tricky. */
104 parse_small_immediate (cd, strp, opindex, valuep)
108 unsigned long *valuep;
111 enum cgen_parse_operand_result result;
115 return _("No relocation for small immediate");
117 errmsg = (* cd->parse_operand_fn)
118 (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
124 if (result != CGEN_PARSE_OPERAND_RESULT_NUMBER)
125 return _("Small operand was not an immediate number");
131 /* Literal scan be either a normal literal, a @hi() or @lo relocation. */
134 parse_immediate16 (cd, strp, opindex, valuep)
138 unsigned long *valuep;
141 enum cgen_parse_operand_result result;
142 bfd_reloc_code_real_type code = BFD_RELOC_NONE;
145 if (strncmp (*strp, "@hi(", 4) == 0)
148 code = BFD_RELOC_HI16;
151 if (strncmp (*strp, "@lo(", 4) == 0)
154 code = BFD_RELOC_LO16;
157 if (code == BFD_RELOC_NONE)
158 errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
161 errmsg = cgen_parse_address (cd, strp, opindex, code, &result, &value);
162 if ((errmsg == NULL) &&
163 (result != CGEN_PARSE_OPERAND_RESULT_QUEUED))
164 errmsg = _("Operand is not a symbol");
167 if ((code == BFD_RELOC_HI16 || code == BFD_RELOC_LO16)
172 errmsg = _("Syntax error: No trailing ')'");
180 const char * xstormy16_cgen_parse_operand
181 PARAMS ((CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *));
183 /* Main entry point for operand parsing.
185 This function is basically just a big switch statement. Earlier versions
186 used tables to look up the function to use, but
187 - if the table contains both assembler and disassembler functions then
188 the disassembler contains much of the assembler and vice-versa,
189 - there's a lot of inlining possibilities as things grow,
190 - using a switch statement avoids the function call overhead.
192 This function could be moved into `parse_insn_normal', but keeping it
193 separate makes clear the interface between `parse_insn_normal' and each of
197 xstormy16_cgen_parse_operand (cd, opindex, strp, fields)
201 CGEN_FIELDS * fields;
203 const char * errmsg = NULL;
204 /* Used by scalar operands that still need to be parsed. */
205 long junk ATTRIBUTE_UNUSED;
209 case XSTORMY16_OPERAND_RB :
210 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_Rb_names, & fields->f_Rb);
212 case XSTORMY16_OPERAND_RBJ :
213 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_Rb_names, & fields->f_Rbj);
215 case XSTORMY16_OPERAND_RD :
216 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rd);
218 case XSTORMY16_OPERAND_RDM :
219 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rdm);
221 case XSTORMY16_OPERAND_RM :
222 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rm);
224 case XSTORMY16_OPERAND_RS :
225 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rs);
227 case XSTORMY16_OPERAND_ABS24 :
228 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_ABS24, &fields->f_abs24);
230 case XSTORMY16_OPERAND_BCOND2 :
231 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_h_branchcond, & fields->f_op2);
233 case XSTORMY16_OPERAND_BCOND5 :
234 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_h_branchcond, & fields->f_op5);
236 case XSTORMY16_OPERAND_HMEM8 :
237 errmsg = parse_mem8 (cd, strp, XSTORMY16_OPERAND_HMEM8, &fields->f_hmem8);
239 case XSTORMY16_OPERAND_IMM12 :
240 errmsg = cgen_parse_signed_integer (cd, strp, XSTORMY16_OPERAND_IMM12, &fields->f_imm12);
242 case XSTORMY16_OPERAND_IMM16 :
243 errmsg = parse_immediate16 (cd, strp, XSTORMY16_OPERAND_IMM16, &fields->f_imm16);
245 case XSTORMY16_OPERAND_IMM2 :
246 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM2, &fields->f_imm2);
248 case XSTORMY16_OPERAND_IMM3 :
249 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM3, &fields->f_imm3);
251 case XSTORMY16_OPERAND_IMM3B :
252 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM3B, &fields->f_imm3b);
254 case XSTORMY16_OPERAND_IMM4 :
255 errmsg = parse_small_immediate (cd, strp, XSTORMY16_OPERAND_IMM4, &fields->f_imm4);
257 case XSTORMY16_OPERAND_IMM8 :
258 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM8, &fields->f_imm8);
260 case XSTORMY16_OPERAND_IMM8SMALL :
261 errmsg = parse_small_immediate (cd, strp, XSTORMY16_OPERAND_IMM8SMALL, &fields->f_imm8);
263 case XSTORMY16_OPERAND_LMEM8 :
264 errmsg = parse_mem8 (cd, strp, XSTORMY16_OPERAND_LMEM8, &fields->f_lmem8);
266 case XSTORMY16_OPERAND_REL12 :
267 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL12, &fields->f_rel12);
269 case XSTORMY16_OPERAND_REL12A :
270 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL12A, &fields->f_rel12a);
272 case XSTORMY16_OPERAND_REL8_2 :
273 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL8_2, &fields->f_rel8_2);
275 case XSTORMY16_OPERAND_REL8_4 :
276 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL8_4, &fields->f_rel8_4);
278 case XSTORMY16_OPERAND_WS2 :
279 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_h_wordsize, & fields->f_op2m);
283 /* xgettext:c-format */
284 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
291 cgen_parse_fn * const xstormy16_cgen_parse_handlers[] =
297 xstormy16_cgen_init_asm (cd)
300 xstormy16_cgen_init_opcode_table (cd);
301 xstormy16_cgen_init_ibld_table (cd);
302 cd->parse_handlers = & xstormy16_cgen_parse_handlers[0];
303 cd->parse_operand = xstormy16_cgen_parse_operand;
308 /* Regex construction routine.
310 This translates an opcode syntax string into a regex string,
311 by replacing any non-character syntax element (such as an
312 opcode) with the pattern '.*'
314 It then compiles the regex and stores it in the opcode, for
315 later use by xstormy16_cgen_assemble_insn
317 Returns NULL for success, an error message for failure. */
320 xstormy16_cgen_build_insn_regex (CGEN_INSN *insn)
322 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
323 const char *mnem = CGEN_INSN_MNEMONIC (insn);
324 char rxbuf[CGEN_MAX_RX_ELEMENTS];
326 const CGEN_SYNTAX_CHAR_TYPE *syn;
329 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
331 /* Mnemonics come first in the syntax string. */
332 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
333 return _("missing mnemonic in syntax string");
336 /* Generate a case sensitive regular expression that emulates case
337 insensitive matching in the "C" locale. We cannot generate a case
338 insensitive regular expression because in Turkish locales, 'i' and 'I'
339 are not equal modulo case conversion. */
341 /* Copy the literal mnemonic out of the insn. */
342 for (; *mnem; mnem++)
357 /* Copy any remaining literals from the syntax string into the rx. */
358 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
360 if (CGEN_SYNTAX_CHAR_P (* syn))
362 char c = CGEN_SYNTAX_CHAR (* syn);
366 /* Escape any regex metacharacters in the syntax. */
367 case '.': case '[': case '\\':
368 case '*': case '^': case '$':
370 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
371 case '?': case '{': case '}':
372 case '(': case ')': case '*':
373 case '|': case '+': case ']':
394 /* Replace non-syntax fields with globs. */
400 /* Trailing whitespace ok. */
407 /* But anchor it after that. */
411 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
412 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
420 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
421 regfree ((regex_t *) CGEN_INSN_RX (insn));
422 free (CGEN_INSN_RX (insn));
423 (CGEN_INSN_RX (insn)) = NULL;
429 /* Default insn parser.
431 The syntax string is scanned and operands are parsed and stored in FIELDS.
432 Relocs are queued as we go via other callbacks.
434 ??? Note that this is currently an all-or-nothing parser. If we fail to
435 parse the instruction, we return 0 and the caller will start over from
436 the beginning. Backtracking will be necessary in parsing subexpressions,
437 but that can be handled there. Not handling backtracking here may get
438 expensive in the case of the m68k. Deal with later.
440 Returns NULL for success, an error message for failure. */
443 parse_insn_normal (CGEN_CPU_DESC cd,
444 const CGEN_INSN *insn,
448 /* ??? Runtime added insns not handled yet. */
449 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
450 const char *str = *strp;
453 const CGEN_SYNTAX_CHAR_TYPE * syn;
454 #ifdef CGEN_MNEMONIC_OPERANDS
459 /* For now we assume the mnemonic is first (there are no leading operands).
460 We can parse it without needing to set up operand parsing.
461 GAS's input scrubber will ensure mnemonics are lowercase, but we may
462 not be called from GAS. */
463 p = CGEN_INSN_MNEMONIC (insn);
464 while (*p && TOLOWER (*p) == TOLOWER (*str))
468 return _("unrecognized instruction");
470 #ifndef CGEN_MNEMONIC_OPERANDS
471 if (* str && ! ISSPACE (* str))
472 return _("unrecognized instruction");
475 CGEN_INIT_PARSE (cd);
476 cgen_init_parse_operand (cd);
477 #ifdef CGEN_MNEMONIC_OPERANDS
481 /* We don't check for (*str != '\0') here because we want to parse
482 any trailing fake arguments in the syntax string. */
483 syn = CGEN_SYNTAX_STRING (syntax);
485 /* Mnemonics come first for now, ensure valid string. */
486 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
493 /* Non operand chars must match exactly. */
494 if (CGEN_SYNTAX_CHAR_P (* syn))
496 /* FIXME: While we allow for non-GAS callers above, we assume the
497 first char after the mnemonic part is a space. */
498 /* FIXME: We also take inappropriate advantage of the fact that
499 GAS's input scrubber will remove extraneous blanks. */
500 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
502 #ifdef CGEN_MNEMONIC_OPERANDS
503 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
511 /* Syntax char didn't match. Can't be this insn. */
512 static char msg [80];
514 /* xgettext:c-format */
515 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
516 CGEN_SYNTAX_CHAR(*syn), *str);
521 /* Ran out of input. */
522 static char msg [80];
524 /* xgettext:c-format */
525 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
526 CGEN_SYNTAX_CHAR(*syn));
532 /* We have an operand of some sort. */
533 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
538 /* Done with this operand, continue with next one. */
542 /* If we're at the end of the syntax string, we're done. */
545 /* FIXME: For the moment we assume a valid `str' can only contain
546 blanks now. IE: We needn't try again with a longer version of
547 the insn and it is assumed that longer versions of insns appear
548 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
549 while (ISSPACE (* str))
553 return _("junk at end of line"); /* FIXME: would like to include `str' */
558 /* We couldn't parse it. */
559 return _("unrecognized instruction");
563 This routine is called for each instruction to be assembled.
564 STR points to the insn to be assembled.
565 We assume all necessary tables have been initialized.
566 The assembled instruction, less any fixups, is stored in BUF.
567 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
568 still needs to be converted to target byte order, otherwise BUF is an array
569 of bytes in target byte order.
570 The result is a pointer to the insn's entry in the opcode table,
571 or NULL if an error occured (an error message will have already been
574 Note that when processing (non-alias) macro-insns,
575 this function recurses.
577 ??? It's possible to make this cpu-independent.
578 One would have to deal with a few minor things.
579 At this point in time doing so would be more of a curiosity than useful
580 [for example this file isn't _that_ big], but keeping the possibility in
581 mind helps keep the design clean. */
584 xstormy16_cgen_assemble_insn (CGEN_CPU_DESC cd,
587 CGEN_INSN_BYTES_PTR buf,
591 CGEN_INSN_LIST *ilist;
592 const char *parse_errmsg = NULL;
593 const char *insert_errmsg = NULL;
594 int recognized_mnemonic = 0;
596 /* Skip leading white space. */
597 while (ISSPACE (* str))
600 /* The instructions are stored in hashed lists.
601 Get the first in the list. */
602 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
604 /* Keep looking until we find a match. */
606 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
608 const CGEN_INSN *insn = ilist->insn;
609 recognized_mnemonic = 1;
611 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
612 /* Not usually needed as unsupported opcodes
613 shouldn't be in the hash lists. */
614 /* Is this insn supported by the selected cpu? */
615 if (! xstormy16_cgen_insn_supported (cd, insn))
618 /* If the RELAXED attribute is set, this is an insn that shouldn't be
619 chosen immediately. Instead, it is used during assembler/linker
620 relaxation if possible. */
621 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
626 /* Skip this insn if str doesn't look right lexically. */
627 if (CGEN_INSN_RX (insn) != NULL &&
628 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
631 /* Allow parse/insert handlers to obtain length of insn. */
632 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
634 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
635 if (parse_errmsg != NULL)
638 /* ??? 0 is passed for `pc'. */
639 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
641 if (insert_errmsg != NULL)
644 /* It is up to the caller to actually output the insn and any
650 static char errbuf[150];
651 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
652 const char *tmp_errmsg;
654 /* If requesting verbose error messages, use insert_errmsg.
655 Failing that, use parse_errmsg. */
656 tmp_errmsg = (insert_errmsg ? insert_errmsg :
657 parse_errmsg ? parse_errmsg :
658 recognized_mnemonic ?
659 _("unrecognized form of instruction") :
660 _("unrecognized instruction"));
662 if (strlen (start) > 50)
663 /* xgettext:c-format */
664 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
666 /* xgettext:c-format */
667 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
669 if (strlen (start) > 50)
670 /* xgettext:c-format */
671 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
673 /* xgettext:c-format */
674 sprintf (errbuf, _("bad instruction `%.50s'"), start);
682 #if 0 /* This calls back to GAS which we can't do without care. */
684 /* Record each member of OPVALS in the assembler's symbol table.
685 This lets GAS parse registers for us.
686 ??? Interesting idea but not currently used. */
688 /* Record each member of OPVALS in the assembler's symbol table.
689 FIXME: Not currently used. */
692 xstormy16_cgen_asm_hash_keywords (CGEN_CPU_DESC cd, CGEN_KEYWORD *opvals)
694 CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL);
695 const CGEN_KEYWORD_ENTRY * ke;
697 while ((ke = cgen_keyword_search_next (& search)) != NULL)
699 #if 0 /* Unnecessary, should be done in the search routine. */
700 if (! xstormy16_cgen_opval_supported (ke))
703 cgen_asm_record_register (cd, ke->name, ke->value);