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 (C) 1996-2016 Free Software Foundation, Inc.
9 This file is part of libopcodes.
11 This library 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 3, or (at your option)
16 It is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
18 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
19 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 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
26 /* ??? Eventually more and more of this stuff can go to cpu-independent files.
34 #include "fr30-desc.h"
38 #include "libiberty.h"
39 #include "safe-ctype.h"
42 #define min(a,b) ((a) < (b) ? (a) : (b))
44 #define max(a,b) ((a) > (b) ? (a) : (b))
46 static const char * parse_insn_normal
47 (CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *);
49 /* -- assembler routines inserted here. */
52 /* Handle register lists for LDMx and STMx. */
55 parse_register_number (const char **strp)
59 if (**strp < '0' || **strp > '9')
60 return -1; /* Error. */
64 if (**strp >= '0' && **strp <= '9')
66 regno = regno * 10 + (**strp - '0');
74 parse_register_list (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
76 int opindex ATTRIBUTE_UNUSED,
77 unsigned long *valuep,
78 int high_low, /* 0 == high, 1 == low. */
79 int load_store) /* 0 == load, 1 == store. */
82 while (**strp && **strp != ')')
86 if (**strp != 'R' && **strp != 'r')
90 regno = parse_register_number (strp);
92 return _("Register number is not valid");
93 if (regno > 7 && !high_low)
94 return _("Register must be between r0 and r7");
95 if (regno < 8 && high_low)
96 return _("Register must be between r8 and r15");
101 if (load_store) /* Mask is reversed for store. */
102 *valuep |= 0x80 >> regno;
104 *valuep |= 1 << regno;
108 if (*(*strp + 1) == ')')
114 if (!*strp || **strp != ')')
115 return _("Register list is not valid");
121 parse_low_register_list_ld (CGEN_CPU_DESC cd,
124 unsigned long *valuep)
126 return parse_register_list (cd, strp, opindex, valuep,
127 0 /* Low. */, 0 /* Load. */);
131 parse_hi_register_list_ld (CGEN_CPU_DESC cd,
134 unsigned long *valuep)
136 return parse_register_list (cd, strp, opindex, valuep,
137 1 /* High. */, 0 /* Load. */);
141 parse_low_register_list_st (CGEN_CPU_DESC cd,
144 unsigned long *valuep)
146 return parse_register_list (cd, strp, opindex, valuep,
147 0 /* Low. */, 1 /* Store. */);
151 parse_hi_register_list_st (CGEN_CPU_DESC cd,
154 unsigned long *valuep)
156 return parse_register_list (cd, strp, opindex, valuep,
157 1 /* High. */, 1 /* Store. */);
162 const char * fr30_cgen_parse_operand
163 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
165 /* Main entry point for operand parsing.
167 This function is basically just a big switch statement. Earlier versions
168 used tables to look up the function to use, but
169 - if the table contains both assembler and disassembler functions then
170 the disassembler contains much of the assembler and vice-versa,
171 - there's a lot of inlining possibilities as things grow,
172 - using a switch statement avoids the function call overhead.
174 This function could be moved into `parse_insn_normal', but keeping it
175 separate makes clear the interface between `parse_insn_normal' and each of
179 fr30_cgen_parse_operand (CGEN_CPU_DESC cd,
182 CGEN_FIELDS * fields)
184 const char * errmsg = NULL;
185 /* Used by scalar operands that still need to be parsed. */
186 long junk ATTRIBUTE_UNUSED;
190 case FR30_OPERAND_CRI :
191 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_cr_names, & fields->f_CRi);
193 case FR30_OPERAND_CRJ :
194 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_cr_names, & fields->f_CRj);
196 case FR30_OPERAND_R13 :
197 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r13, & junk);
199 case FR30_OPERAND_R14 :
200 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r14, & junk);
202 case FR30_OPERAND_R15 :
203 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_r15, & junk);
205 case FR30_OPERAND_RI :
206 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Ri);
208 case FR30_OPERAND_RIC :
209 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Ric);
211 case FR30_OPERAND_RJ :
212 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Rj);
214 case FR30_OPERAND_RJC :
215 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_gr_names, & fields->f_Rjc);
217 case FR30_OPERAND_RS1 :
218 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_dr_names, & fields->f_Rs1);
220 case FR30_OPERAND_RS2 :
221 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_dr_names, & fields->f_Rs2);
223 case FR30_OPERAND_CC :
224 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_CC, (unsigned long *) (& fields->f_cc));
226 case FR30_OPERAND_CCC :
227 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_CCC, (unsigned long *) (& fields->f_ccc));
229 case FR30_OPERAND_DIR10 :
230 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR10, (unsigned long *) (& fields->f_dir10));
232 case FR30_OPERAND_DIR8 :
233 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR8, (unsigned long *) (& fields->f_dir8));
235 case FR30_OPERAND_DIR9 :
236 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_DIR9, (unsigned long *) (& fields->f_dir9));
238 case FR30_OPERAND_DISP10 :
239 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP10, (long *) (& fields->f_disp10));
241 case FR30_OPERAND_DISP8 :
242 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP8, (long *) (& fields->f_disp8));
244 case FR30_OPERAND_DISP9 :
245 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_DISP9, (long *) (& fields->f_disp9));
247 case FR30_OPERAND_I20 :
248 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I20, (unsigned long *) (& fields->f_i20));
250 case FR30_OPERAND_I32 :
251 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I32, (unsigned long *) (& fields->f_i32));
253 case FR30_OPERAND_I8 :
254 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_I8, (unsigned long *) (& fields->f_i8));
256 case FR30_OPERAND_LABEL12 :
259 errmsg = cgen_parse_address (cd, strp, FR30_OPERAND_LABEL12, 0, NULL, & value);
260 fields->f_rel12 = value;
263 case FR30_OPERAND_LABEL9 :
266 errmsg = cgen_parse_address (cd, strp, FR30_OPERAND_LABEL9, 0, NULL, & value);
267 fields->f_rel9 = value;
270 case FR30_OPERAND_M4 :
271 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_M4, (long *) (& fields->f_m4));
273 case FR30_OPERAND_PS :
274 errmsg = cgen_parse_keyword (cd, strp, & fr30_cgen_opval_h_ps, & junk);
276 case FR30_OPERAND_REGLIST_HI_LD :
277 errmsg = parse_hi_register_list_ld (cd, strp, FR30_OPERAND_REGLIST_HI_LD, (unsigned long *) (& fields->f_reglist_hi_ld));
279 case FR30_OPERAND_REGLIST_HI_ST :
280 errmsg = parse_hi_register_list_st (cd, strp, FR30_OPERAND_REGLIST_HI_ST, (unsigned long *) (& fields->f_reglist_hi_st));
282 case FR30_OPERAND_REGLIST_LOW_LD :
283 errmsg = parse_low_register_list_ld (cd, strp, FR30_OPERAND_REGLIST_LOW_LD, (unsigned long *) (& fields->f_reglist_low_ld));
285 case FR30_OPERAND_REGLIST_LOW_ST :
286 errmsg = parse_low_register_list_st (cd, strp, FR30_OPERAND_REGLIST_LOW_ST, (unsigned long *) (& fields->f_reglist_low_st));
288 case FR30_OPERAND_S10 :
289 errmsg = cgen_parse_signed_integer (cd, strp, FR30_OPERAND_S10, (long *) (& fields->f_s10));
291 case FR30_OPERAND_U10 :
292 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U10, (unsigned long *) (& fields->f_u10));
294 case FR30_OPERAND_U4 :
295 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U4, (unsigned long *) (& fields->f_u4));
297 case FR30_OPERAND_U4C :
298 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U4C, (unsigned long *) (& fields->f_u4c));
300 case FR30_OPERAND_U8 :
301 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_U8, (unsigned long *) (& fields->f_u8));
303 case FR30_OPERAND_UDISP6 :
304 errmsg = cgen_parse_unsigned_integer (cd, strp, FR30_OPERAND_UDISP6, (unsigned long *) (& fields->f_udisp6));
308 /* xgettext:c-format */
309 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
316 cgen_parse_fn * const fr30_cgen_parse_handlers[] =
322 fr30_cgen_init_asm (CGEN_CPU_DESC cd)
324 fr30_cgen_init_opcode_table (cd);
325 fr30_cgen_init_ibld_table (cd);
326 cd->parse_handlers = & fr30_cgen_parse_handlers[0];
327 cd->parse_operand = fr30_cgen_parse_operand;
328 #ifdef CGEN_ASM_INIT_HOOK
335 /* Regex construction routine.
337 This translates an opcode syntax string into a regex string,
338 by replacing any non-character syntax element (such as an
339 opcode) with the pattern '.*'
341 It then compiles the regex and stores it in the opcode, for
342 later use by fr30_cgen_assemble_insn
344 Returns NULL for success, an error message for failure. */
347 fr30_cgen_build_insn_regex (CGEN_INSN *insn)
349 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
350 const char *mnem = CGEN_INSN_MNEMONIC (insn);
351 char rxbuf[CGEN_MAX_RX_ELEMENTS];
353 const CGEN_SYNTAX_CHAR_TYPE *syn;
356 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
358 /* Mnemonics come first in the syntax string. */
359 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
360 return _("missing mnemonic in syntax string");
363 /* Generate a case sensitive regular expression that emulates case
364 insensitive matching in the "C" locale. We cannot generate a case
365 insensitive regular expression because in Turkish locales, 'i' and 'I'
366 are not equal modulo case conversion. */
368 /* Copy the literal mnemonic out of the insn. */
369 for (; *mnem; mnem++)
384 /* Copy any remaining literals from the syntax string into the rx. */
385 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
387 if (CGEN_SYNTAX_CHAR_P (* syn))
389 char c = CGEN_SYNTAX_CHAR (* syn);
393 /* Escape any regex metacharacters in the syntax. */
394 case '.': case '[': case '\\':
395 case '*': case '^': case '$':
397 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
398 case '?': case '{': case '}':
399 case '(': case ')': case '*':
400 case '|': case '+': case ']':
421 /* Replace non-syntax fields with globs. */
427 /* Trailing whitespace ok. */
434 /* But anchor it after that. */
438 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
439 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
447 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
448 regfree ((regex_t *) CGEN_INSN_RX (insn));
449 free (CGEN_INSN_RX (insn));
450 (CGEN_INSN_RX (insn)) = NULL;
456 /* Default insn parser.
458 The syntax string is scanned and operands are parsed and stored in FIELDS.
459 Relocs are queued as we go via other callbacks.
461 ??? Note that this is currently an all-or-nothing parser. If we fail to
462 parse the instruction, we return 0 and the caller will start over from
463 the beginning. Backtracking will be necessary in parsing subexpressions,
464 but that can be handled there. Not handling backtracking here may get
465 expensive in the case of the m68k. Deal with later.
467 Returns NULL for success, an error message for failure. */
470 parse_insn_normal (CGEN_CPU_DESC cd,
471 const CGEN_INSN *insn,
475 /* ??? Runtime added insns not handled yet. */
476 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
477 const char *str = *strp;
480 const CGEN_SYNTAX_CHAR_TYPE * syn;
481 #ifdef CGEN_MNEMONIC_OPERANDS
486 /* For now we assume the mnemonic is first (there are no leading operands).
487 We can parse it without needing to set up operand parsing.
488 GAS's input scrubber will ensure mnemonics are lowercase, but we may
489 not be called from GAS. */
490 p = CGEN_INSN_MNEMONIC (insn);
491 while (*p && TOLOWER (*p) == TOLOWER (*str))
495 return _("unrecognized instruction");
497 #ifndef CGEN_MNEMONIC_OPERANDS
498 if (* str && ! ISSPACE (* str))
499 return _("unrecognized instruction");
502 CGEN_INIT_PARSE (cd);
503 cgen_init_parse_operand (cd);
504 #ifdef CGEN_MNEMONIC_OPERANDS
508 /* We don't check for (*str != '\0') here because we want to parse
509 any trailing fake arguments in the syntax string. */
510 syn = CGEN_SYNTAX_STRING (syntax);
512 /* Mnemonics come first for now, ensure valid string. */
513 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
520 /* Non operand chars must match exactly. */
521 if (CGEN_SYNTAX_CHAR_P (* syn))
523 /* FIXME: While we allow for non-GAS callers above, we assume the
524 first char after the mnemonic part is a space. */
525 /* FIXME: We also take inappropriate advantage of the fact that
526 GAS's input scrubber will remove extraneous blanks. */
527 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
529 #ifdef CGEN_MNEMONIC_OPERANDS
530 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
538 /* Syntax char didn't match. Can't be this insn. */
539 static char msg [80];
541 /* xgettext:c-format */
542 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
543 CGEN_SYNTAX_CHAR(*syn), *str);
548 /* Ran out of input. */
549 static char msg [80];
551 /* xgettext:c-format */
552 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
553 CGEN_SYNTAX_CHAR(*syn));
559 #ifdef CGEN_MNEMONIC_OPERANDS
560 (void) past_opcode_p;
562 /* We have an operand of some sort. */
563 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields);
567 /* Done with this operand, continue with next one. */
571 /* If we're at the end of the syntax string, we're done. */
574 /* FIXME: For the moment we assume a valid `str' can only contain
575 blanks now. IE: We needn't try again with a longer version of
576 the insn and it is assumed that longer versions of insns appear
577 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
578 while (ISSPACE (* str))
582 return _("junk at end of line"); /* FIXME: would like to include `str' */
587 /* We couldn't parse it. */
588 return _("unrecognized instruction");
592 This routine is called for each instruction to be assembled.
593 STR points to the insn to be assembled.
594 We assume all necessary tables have been initialized.
595 The assembled instruction, less any fixups, is stored in BUF.
596 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
597 still needs to be converted to target byte order, otherwise BUF is an array
598 of bytes in target byte order.
599 The result is a pointer to the insn's entry in the opcode table,
600 or NULL if an error occured (an error message will have already been
603 Note that when processing (non-alias) macro-insns,
604 this function recurses.
606 ??? It's possible to make this cpu-independent.
607 One would have to deal with a few minor things.
608 At this point in time doing so would be more of a curiosity than useful
609 [for example this file isn't _that_ big], but keeping the possibility in
610 mind helps keep the design clean. */
613 fr30_cgen_assemble_insn (CGEN_CPU_DESC cd,
616 CGEN_INSN_BYTES_PTR buf,
620 CGEN_INSN_LIST *ilist;
621 const char *parse_errmsg = NULL;
622 const char *insert_errmsg = NULL;
623 int recognized_mnemonic = 0;
625 /* Skip leading white space. */
626 while (ISSPACE (* str))
629 /* The instructions are stored in hashed lists.
630 Get the first in the list. */
631 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
633 /* Keep looking until we find a match. */
635 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
637 const CGEN_INSN *insn = ilist->insn;
638 recognized_mnemonic = 1;
640 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
641 /* Not usually needed as unsupported opcodes
642 shouldn't be in the hash lists. */
643 /* Is this insn supported by the selected cpu? */
644 if (! fr30_cgen_insn_supported (cd, insn))
647 /* If the RELAXED attribute is set, this is an insn that shouldn't be
648 chosen immediately. Instead, it is used during assembler/linker
649 relaxation if possible. */
650 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
655 /* Skip this insn if str doesn't look right lexically. */
656 if (CGEN_INSN_RX (insn) != NULL &&
657 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
660 /* Allow parse/insert handlers to obtain length of insn. */
661 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
663 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
664 if (parse_errmsg != NULL)
667 /* ??? 0 is passed for `pc'. */
668 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
670 if (insert_errmsg != NULL)
673 /* It is up to the caller to actually output the insn and any
679 static char errbuf[150];
680 const char *tmp_errmsg;
681 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
689 /* If requesting verbose error messages, use insert_errmsg.
690 Failing that, use parse_errmsg. */
691 tmp_errmsg = (insert_errmsg ? insert_errmsg :
692 parse_errmsg ? parse_errmsg :
693 recognized_mnemonic ?
694 _("unrecognized form of instruction") :
695 _("unrecognized instruction"));
697 if (strlen (start) > 50)
698 /* xgettext:c-format */
699 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
701 /* xgettext:c-format */
702 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
706 if (strlen (start) > 50)
707 /* xgettext:c-format */
708 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
710 /* xgettext:c-format */
711 sprintf (errbuf, _("bad instruction `%.50s'"), start);