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) 1996-2017 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 "m32r-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 static const char * MISSING_CLOSING_PARENTHESIS = N_("missing `)'");
54 /* Handle '#' prefixes (i.e. skip over them). */
57 parse_hash (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
59 int opindex ATTRIBUTE_UNUSED,
60 long *valuep ATTRIBUTE_UNUSED)
67 /* Handle shigh(), high(). */
70 parse_hi16 (CGEN_CPU_DESC cd,
73 unsigned long *valuep)
76 enum cgen_parse_operand_result result_type;
82 if (strncasecmp (*strp, "high(", 5) == 0)
85 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_HI16_ULO,
86 & result_type, & value);
88 return MISSING_CLOSING_PARENTHESIS;
91 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
99 else if (strncasecmp (*strp, "shigh(", 6) == 0)
102 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_HI16_SLO,
103 & result_type, & value);
105 return MISSING_CLOSING_PARENTHESIS;
108 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
118 return cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
121 /* Handle low() in a signed context. Also handle sda().
122 The signedness of the value doesn't matter to low(), but this also
123 handles the case where low() isn't present. */
126 parse_slo16 (CGEN_CPU_DESC cd,
132 enum cgen_parse_operand_result result_type;
138 if (strncasecmp (*strp, "low(", 4) == 0)
141 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_LO16,
142 & result_type, & value);
144 return MISSING_CLOSING_PARENTHESIS;
147 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
148 value = ((value & 0xffff) ^ 0x8000) - 0x8000;
153 if (strncasecmp (*strp, "sda(", 4) == 0)
156 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_SDA16,
159 return MISSING_CLOSING_PARENTHESIS;
165 return cgen_parse_signed_integer (cd, strp, opindex, valuep);
168 /* Handle low() in an unsigned context.
169 The signedness of the value doesn't matter to low(), but this also
170 handles the case where low() isn't present. */
173 parse_ulo16 (CGEN_CPU_DESC cd,
176 unsigned long *valuep)
179 enum cgen_parse_operand_result result_type;
185 if (strncasecmp (*strp, "low(", 4) == 0)
188 errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_M32R_LO16,
189 & result_type, & value);
191 return MISSING_CLOSING_PARENTHESIS;
194 && result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
200 return cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
205 const char * m32r_cgen_parse_operand
206 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
208 /* Main entry point for operand parsing.
210 This function is basically just a big switch statement. Earlier versions
211 used tables to look up the function to use, but
212 - if the table contains both assembler and disassembler functions then
213 the disassembler contains much of the assembler and vice-versa,
214 - there's a lot of inlining possibilities as things grow,
215 - using a switch statement avoids the function call overhead.
217 This function could be moved into `parse_insn_normal', but keeping it
218 separate makes clear the interface between `parse_insn_normal' and each of
222 m32r_cgen_parse_operand (CGEN_CPU_DESC cd,
225 CGEN_FIELDS * fields)
227 const char * errmsg = NULL;
228 /* Used by scalar operands that still need to be parsed. */
229 long junk ATTRIBUTE_UNUSED;
233 case M32R_OPERAND_ACC :
234 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_h_accums, & fields->f_acc);
236 case M32R_OPERAND_ACCD :
237 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_h_accums, & fields->f_accd);
239 case M32R_OPERAND_ACCS :
240 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_h_accums, & fields->f_accs);
242 case M32R_OPERAND_DCR :
243 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_cr_names, & fields->f_r1);
245 case M32R_OPERAND_DISP16 :
248 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_DISP16, 0, NULL, & value);
249 fields->f_disp16 = value;
252 case M32R_OPERAND_DISP24 :
255 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_DISP24, 0, NULL, & value);
256 fields->f_disp24 = value;
259 case M32R_OPERAND_DISP8 :
262 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_DISP8, 0, NULL, & value);
263 fields->f_disp8 = value;
266 case M32R_OPERAND_DR :
267 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r1);
269 case M32R_OPERAND_HASH :
270 errmsg = parse_hash (cd, strp, M32R_OPERAND_HASH, (long *) (& junk));
272 case M32R_OPERAND_HI16 :
273 errmsg = parse_hi16 (cd, strp, M32R_OPERAND_HI16, (unsigned long *) (& fields->f_hi16));
275 case M32R_OPERAND_IMM1 :
276 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_IMM1, (unsigned long *) (& fields->f_imm1));
278 case M32R_OPERAND_SCR :
279 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_cr_names, & fields->f_r2);
281 case M32R_OPERAND_SIMM16 :
282 errmsg = cgen_parse_signed_integer (cd, strp, M32R_OPERAND_SIMM16, (long *) (& fields->f_simm16));
284 case M32R_OPERAND_SIMM8 :
285 errmsg = cgen_parse_signed_integer (cd, strp, M32R_OPERAND_SIMM8, (long *) (& fields->f_simm8));
287 case M32R_OPERAND_SLO16 :
288 errmsg = parse_slo16 (cd, strp, M32R_OPERAND_SLO16, (long *) (& fields->f_simm16));
290 case M32R_OPERAND_SR :
291 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r2);
293 case M32R_OPERAND_SRC1 :
294 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r1);
296 case M32R_OPERAND_SRC2 :
297 errmsg = cgen_parse_keyword (cd, strp, & m32r_cgen_opval_gr_names, & fields->f_r2);
299 case M32R_OPERAND_UIMM16 :
300 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM16, (unsigned long *) (& fields->f_uimm16));
302 case M32R_OPERAND_UIMM24 :
305 errmsg = cgen_parse_address (cd, strp, M32R_OPERAND_UIMM24, 0, NULL, & value);
306 fields->f_uimm24 = value;
309 case M32R_OPERAND_UIMM3 :
310 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM3, (unsigned long *) (& fields->f_uimm3));
312 case M32R_OPERAND_UIMM4 :
313 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM4, (unsigned long *) (& fields->f_uimm4));
315 case M32R_OPERAND_UIMM5 :
316 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM5, (unsigned long *) (& fields->f_uimm5));
318 case M32R_OPERAND_UIMM8 :
319 errmsg = cgen_parse_unsigned_integer (cd, strp, M32R_OPERAND_UIMM8, (unsigned long *) (& fields->f_uimm8));
321 case M32R_OPERAND_ULO16 :
322 errmsg = parse_ulo16 (cd, strp, M32R_OPERAND_ULO16, (unsigned long *) (& fields->f_uimm16));
326 /* xgettext:c-format */
327 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
334 cgen_parse_fn * const m32r_cgen_parse_handlers[] =
340 m32r_cgen_init_asm (CGEN_CPU_DESC 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;
346 #ifdef CGEN_ASM_INIT_HOOK
353 /* Regex construction routine.
355 This translates an opcode syntax string into a regex string,
356 by replacing any non-character syntax element (such as an
357 opcode) with the pattern '.*'
359 It then compiles the regex and stores it in the opcode, for
360 later use by m32r_cgen_assemble_insn
362 Returns NULL for success, an error message for failure. */
365 m32r_cgen_build_insn_regex (CGEN_INSN *insn)
367 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
368 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))
378 return _("missing mnemonic in syntax string");
381 /* Generate a case sensitive regular expression that emulates case
382 insensitive matching in the "C" locale. We cannot generate a case
383 insensitive regular expression because in Turkish locales, 'i' and 'I'
384 are not equal modulo case conversion. */
386 /* Copy the literal mnemonic out of the insn. */
387 for (; *mnem; mnem++)
402 /* Copy any remaining literals from the syntax string into the rx. */
403 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
405 if (CGEN_SYNTAX_CHAR_P (* syn))
407 char c = CGEN_SYNTAX_CHAR (* syn);
411 /* Escape any regex metacharacters in the syntax. */
412 case '.': case '[': case '\\':
413 case '*': case '^': case '$':
415 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
416 case '?': case '{': case '}':
417 case '(': case ')': case '*':
418 case '|': case '+': case ']':
439 /* Replace non-syntax fields with globs. */
445 /* Trailing whitespace ok. */
452 /* But anchor it after that. */
456 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
457 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
465 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
466 regfree ((regex_t *) CGEN_INSN_RX (insn));
467 free (CGEN_INSN_RX (insn));
468 (CGEN_INSN_RX (insn)) = NULL;
474 /* Default insn parser.
476 The syntax string is scanned and operands are parsed and stored in FIELDS.
477 Relocs are queued as we go via other callbacks.
479 ??? Note that this is currently an all-or-nothing parser. If we fail to
480 parse the instruction, we return 0 and the caller will start over from
481 the beginning. Backtracking will be necessary in parsing subexpressions,
482 but that can be handled there. Not handling backtracking here may get
483 expensive in the case of the m68k. Deal with later.
485 Returns NULL for success, an error message for failure. */
488 parse_insn_normal (CGEN_CPU_DESC cd,
489 const CGEN_INSN *insn,
493 /* ??? Runtime added insns not handled yet. */
494 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
495 const char *str = *strp;
498 const CGEN_SYNTAX_CHAR_TYPE * syn;
499 #ifdef CGEN_MNEMONIC_OPERANDS
504 /* For now we assume the mnemonic is first (there are no leading operands).
505 We can parse it without needing to set up operand parsing.
506 GAS's input scrubber will ensure mnemonics are lowercase, but we may
507 not be called from GAS. */
508 p = CGEN_INSN_MNEMONIC (insn);
509 while (*p && TOLOWER (*p) == TOLOWER (*str))
513 return _("unrecognized instruction");
515 #ifndef CGEN_MNEMONIC_OPERANDS
516 if (* str && ! ISSPACE (* str))
517 return _("unrecognized instruction");
520 CGEN_INIT_PARSE (cd);
521 cgen_init_parse_operand (cd);
522 #ifdef CGEN_MNEMONIC_OPERANDS
526 /* We don't check for (*str != '\0') here because we want to parse
527 any trailing fake arguments in the syntax string. */
528 syn = CGEN_SYNTAX_STRING (syntax);
530 /* Mnemonics come first for now, ensure valid string. */
531 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
538 /* Non operand chars must match exactly. */
539 if (CGEN_SYNTAX_CHAR_P (* syn))
541 /* FIXME: While we allow for non-GAS callers above, we assume the
542 first char after the mnemonic part is a space. */
543 /* FIXME: We also take inappropriate advantage of the fact that
544 GAS's input scrubber will remove extraneous blanks. */
545 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
547 #ifdef CGEN_MNEMONIC_OPERANDS
548 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
556 /* Syntax char didn't match. Can't be this insn. */
557 static char msg [80];
559 /* xgettext:c-format */
560 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
561 CGEN_SYNTAX_CHAR(*syn), *str);
566 /* Ran out of input. */
567 static char msg [80];
569 /* xgettext:c-format */
570 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
571 CGEN_SYNTAX_CHAR(*syn));
577 #ifdef CGEN_MNEMONIC_OPERANDS
578 (void) past_opcode_p;
580 /* We have an operand of some sort. */
581 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn), &str, fields);
585 /* Done with this operand, continue with next one. */
589 /* If we're at the end of the syntax string, we're done. */
592 /* FIXME: For the moment we assume a valid `str' can only contain
593 blanks now. IE: We needn't try again with a longer version of
594 the insn and it is assumed that longer versions of insns appear
595 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
596 while (ISSPACE (* str))
600 return _("junk at end of line"); /* FIXME: would like to include `str' */
605 /* We couldn't parse it. */
606 return _("unrecognized instruction");
610 This routine is called for each instruction to be assembled.
611 STR points to the insn to be assembled.
612 We assume all necessary tables have been initialized.
613 The assembled instruction, less any fixups, is stored in BUF.
614 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
615 still needs to be converted to target byte order, otherwise BUF is an array
616 of bytes in target byte order.
617 The result is a pointer to the insn's entry in the opcode table,
618 or NULL if an error occured (an error message will have already been
621 Note that when processing (non-alias) macro-insns,
622 this function recurses.
624 ??? It's possible to make this cpu-independent.
625 One would have to deal with a few minor things.
626 At this point in time doing so would be more of a curiosity than useful
627 [for example this file isn't _that_ big], but keeping the possibility in
628 mind helps keep the design clean. */
631 m32r_cgen_assemble_insn (CGEN_CPU_DESC cd,
634 CGEN_INSN_BYTES_PTR buf,
638 CGEN_INSN_LIST *ilist;
639 const char *parse_errmsg = NULL;
640 const char *insert_errmsg = NULL;
641 int recognized_mnemonic = 0;
643 /* Skip leading white space. */
644 while (ISSPACE (* str))
647 /* The instructions are stored in hashed lists.
648 Get the first in the list. */
649 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
651 /* Keep looking until we find a match. */
653 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
655 const CGEN_INSN *insn = ilist->insn;
656 recognized_mnemonic = 1;
658 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
659 /* Not usually needed as unsupported opcodes
660 shouldn't be in the hash lists. */
661 /* Is this insn supported by the selected cpu? */
662 if (! m32r_cgen_insn_supported (cd, insn))
665 /* If the RELAXED attribute is set, this is an insn that shouldn't be
666 chosen immediately. Instead, it is used during assembler/linker
667 relaxation if possible. */
668 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
673 /* Skip this insn if str doesn't look right lexically. */
674 if (CGEN_INSN_RX (insn) != NULL &&
675 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
678 /* Allow parse/insert handlers to obtain length of insn. */
679 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
681 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
682 if (parse_errmsg != NULL)
685 /* ??? 0 is passed for `pc'. */
686 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
688 if (insert_errmsg != NULL)
691 /* It is up to the caller to actually output the insn and any
697 static char errbuf[150];
698 const char *tmp_errmsg;
699 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
707 /* If requesting verbose error messages, use insert_errmsg.
708 Failing that, use parse_errmsg. */
709 tmp_errmsg = (insert_errmsg ? insert_errmsg :
710 parse_errmsg ? parse_errmsg :
711 recognized_mnemonic ?
712 _("unrecognized form of instruction") :
713 _("unrecognized instruction"));
715 if (strlen (start) > 50)
716 /* xgettext:c-format */
717 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
719 /* xgettext:c-format */
720 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
724 if (strlen (start) > 50)
725 /* xgettext:c-format */
726 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
728 /* xgettext:c-format */
729 sprintf (errbuf, _("bad instruction `%.50s'"), start);