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, 2005
8 Free Software Foundation, Inc.
10 This file is part of the GNU Binutils and GDB, the GNU debugger.
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2, or (at your option)
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software Foundation, Inc.,
24 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 "xstormy16-desc.h"
35 #include "xstormy16-opc.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. */
53 /* The machine-independent code doesn't know how to disambiguate
57 where 'foo' is a label. This helps it out. */
60 parse_mem8 (CGEN_CPU_DESC cd,
63 unsigned long *valuep)
67 const char *s = *strp;
69 if (s[1] == '-' && s[2] == '-')
70 return _("Bad register in preincrement");
72 while (ISALNUM (*++s))
74 if (s[0] == '+' && s[1] == '+' && (s[2] == ')' || s[2] == ','))
75 return _("Bad register in postincrement");
76 if (s[0] == ',' || s[0] == ')')
77 return _("Bad register name");
79 else if (cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names,
80 (long *) valuep) == NULL)
81 return _("Label conflicts with register name");
82 else if (strncasecmp (*strp, "rx,", 3) == 0
83 || strncasecmp (*strp, "rxl,", 3) == 0
84 || strncasecmp (*strp, "rxh,", 3) == 0)
85 return _("Label conflicts with `Rx'");
86 else if (**strp == '#')
87 return _("Bad immediate expression");
89 return cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
92 /* For the add and subtract instructions, there are two immediate forms,
93 one for small operands and one for large ones. We want to use
94 the small one when possible, but we do not want to generate relocs
95 of the small size. This is somewhat tricky. */
98 parse_small_immediate (CGEN_CPU_DESC cd,
101 unsigned long *valuep)
104 enum cgen_parse_operand_result result;
108 return _("No relocation for small immediate");
110 errmsg = (* cd->parse_operand_fn)
111 (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
117 if (result != CGEN_PARSE_OPERAND_RESULT_NUMBER)
118 return _("Small operand was not an immediate number");
124 /* Literal scan be either a normal literal, a @hi() or @lo relocation. */
127 parse_immediate16 (CGEN_CPU_DESC cd,
130 unsigned long *valuep)
133 enum cgen_parse_operand_result result;
134 bfd_reloc_code_real_type code = BFD_RELOC_NONE;
137 if (strncmp (*strp, "@hi(", 4) == 0)
140 code = BFD_RELOC_HI16;
143 if (strncmp (*strp, "@lo(", 4) == 0)
146 code = BFD_RELOC_LO16;
149 if (code == BFD_RELOC_NONE)
150 errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);
153 errmsg = cgen_parse_address (cd, strp, opindex, code, &result, &value);
154 if ((errmsg == NULL) &&
155 (result != CGEN_PARSE_OPERAND_RESULT_QUEUED))
156 errmsg = _("Operand is not a symbol");
159 if ((code == BFD_RELOC_HI16 || code == BFD_RELOC_LO16)
164 errmsg = _("Syntax error: No trailing ')'");
172 const char * xstormy16_cgen_parse_operand
173 (CGEN_CPU_DESC, int, const char **, CGEN_FIELDS *);
175 /* Main entry point for operand parsing.
177 This function is basically just a big switch statement. Earlier versions
178 used tables to look up the function to use, but
179 - if the table contains both assembler and disassembler functions then
180 the disassembler contains much of the assembler and vice-versa,
181 - there's a lot of inlining possibilities as things grow,
182 - using a switch statement avoids the function call overhead.
184 This function could be moved into `parse_insn_normal', but keeping it
185 separate makes clear the interface between `parse_insn_normal' and each of
189 xstormy16_cgen_parse_operand (CGEN_CPU_DESC cd,
192 CGEN_FIELDS * fields)
194 const char * errmsg = NULL;
195 /* Used by scalar operands that still need to be parsed. */
196 long junk ATTRIBUTE_UNUSED;
200 case XSTORMY16_OPERAND_RB :
201 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_Rb_names, & fields->f_Rb);
203 case XSTORMY16_OPERAND_RBJ :
204 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_Rb_names, & fields->f_Rbj);
206 case XSTORMY16_OPERAND_RD :
207 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rd);
209 case XSTORMY16_OPERAND_RDM :
210 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rdm);
212 case XSTORMY16_OPERAND_RM :
213 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rm);
215 case XSTORMY16_OPERAND_RS :
216 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_gr_names, & fields->f_Rs);
218 case XSTORMY16_OPERAND_ABS24 :
219 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_ABS24, (unsigned long *) (& fields->f_abs24));
221 case XSTORMY16_OPERAND_BCOND2 :
222 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_h_branchcond, & fields->f_op2);
224 case XSTORMY16_OPERAND_BCOND5 :
225 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_h_branchcond, & fields->f_op5);
227 case XSTORMY16_OPERAND_HMEM8 :
228 errmsg = parse_mem8 (cd, strp, XSTORMY16_OPERAND_HMEM8, (unsigned long *) (& fields->f_hmem8));
230 case XSTORMY16_OPERAND_IMM12 :
231 errmsg = cgen_parse_signed_integer (cd, strp, XSTORMY16_OPERAND_IMM12, (long *) (& fields->f_imm12));
233 case XSTORMY16_OPERAND_IMM16 :
234 errmsg = parse_immediate16 (cd, strp, XSTORMY16_OPERAND_IMM16, (unsigned long *) (& fields->f_imm16));
236 case XSTORMY16_OPERAND_IMM2 :
237 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM2, (unsigned long *) (& fields->f_imm2));
239 case XSTORMY16_OPERAND_IMM3 :
240 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM3, (unsigned long *) (& fields->f_imm3));
242 case XSTORMY16_OPERAND_IMM3B :
243 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM3B, (unsigned long *) (& fields->f_imm3b));
245 case XSTORMY16_OPERAND_IMM4 :
246 errmsg = parse_small_immediate (cd, strp, XSTORMY16_OPERAND_IMM4, (unsigned long *) (& fields->f_imm4));
248 case XSTORMY16_OPERAND_IMM8 :
249 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_IMM8, (unsigned long *) (& fields->f_imm8));
251 case XSTORMY16_OPERAND_IMM8SMALL :
252 errmsg = parse_small_immediate (cd, strp, XSTORMY16_OPERAND_IMM8SMALL, (unsigned long *) (& fields->f_imm8));
254 case XSTORMY16_OPERAND_LMEM8 :
255 errmsg = parse_mem8 (cd, strp, XSTORMY16_OPERAND_LMEM8, (unsigned long *) (& fields->f_lmem8));
257 case XSTORMY16_OPERAND_REL12 :
258 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL12, (unsigned long *) (& fields->f_rel12));
260 case XSTORMY16_OPERAND_REL12A :
261 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL12A, (unsigned long *) (& fields->f_rel12a));
263 case XSTORMY16_OPERAND_REL8_2 :
264 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL8_2, (unsigned long *) (& fields->f_rel8_2));
266 case XSTORMY16_OPERAND_REL8_4 :
267 errmsg = cgen_parse_unsigned_integer (cd, strp, XSTORMY16_OPERAND_REL8_4, (unsigned long *) (& fields->f_rel8_4));
269 case XSTORMY16_OPERAND_WS2 :
270 errmsg = cgen_parse_keyword (cd, strp, & xstormy16_cgen_opval_h_wordsize, & fields->f_op2m);
274 /* xgettext:c-format */
275 fprintf (stderr, _("Unrecognized field %d while parsing.\n"), opindex);
282 cgen_parse_fn * const xstormy16_cgen_parse_handlers[] =
288 xstormy16_cgen_init_asm (CGEN_CPU_DESC cd)
290 xstormy16_cgen_init_opcode_table (cd);
291 xstormy16_cgen_init_ibld_table (cd);
292 cd->parse_handlers = & xstormy16_cgen_parse_handlers[0];
293 cd->parse_operand = xstormy16_cgen_parse_operand;
294 #ifdef CGEN_ASM_INIT_HOOK
301 /* Regex construction routine.
303 This translates an opcode syntax string into a regex string,
304 by replacing any non-character syntax element (such as an
305 opcode) with the pattern '.*'
307 It then compiles the regex and stores it in the opcode, for
308 later use by xstormy16_cgen_assemble_insn
310 Returns NULL for success, an error message for failure. */
313 xstormy16_cgen_build_insn_regex (CGEN_INSN *insn)
315 CGEN_OPCODE *opc = (CGEN_OPCODE *) CGEN_INSN_OPCODE (insn);
316 const char *mnem = CGEN_INSN_MNEMONIC (insn);
317 char rxbuf[CGEN_MAX_RX_ELEMENTS];
319 const CGEN_SYNTAX_CHAR_TYPE *syn;
322 syn = CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc));
324 /* Mnemonics come first in the syntax string. */
325 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
326 return _("missing mnemonic in syntax string");
329 /* Generate a case sensitive regular expression that emulates case
330 insensitive matching in the "C" locale. We cannot generate a case
331 insensitive regular expression because in Turkish locales, 'i' and 'I'
332 are not equal modulo case conversion. */
334 /* Copy the literal mnemonic out of the insn. */
335 for (; *mnem; mnem++)
350 /* Copy any remaining literals from the syntax string into the rx. */
351 for(; * syn != 0 && rx <= rxbuf + (CGEN_MAX_RX_ELEMENTS - 7 - 4); ++syn)
353 if (CGEN_SYNTAX_CHAR_P (* syn))
355 char c = CGEN_SYNTAX_CHAR (* syn);
359 /* Escape any regex metacharacters in the syntax. */
360 case '.': case '[': case '\\':
361 case '*': case '^': case '$':
363 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
364 case '?': case '{': case '}':
365 case '(': case ')': case '*':
366 case '|': case '+': case ']':
387 /* Replace non-syntax fields with globs. */
393 /* Trailing whitespace ok. */
400 /* But anchor it after that. */
404 CGEN_INSN_RX (insn) = xmalloc (sizeof (regex_t));
405 reg_err = regcomp ((regex_t *) CGEN_INSN_RX (insn), rxbuf, REG_NOSUB);
413 regerror (reg_err, (regex_t *) CGEN_INSN_RX (insn), msg, 80);
414 regfree ((regex_t *) CGEN_INSN_RX (insn));
415 free (CGEN_INSN_RX (insn));
416 (CGEN_INSN_RX (insn)) = NULL;
422 /* Default insn parser.
424 The syntax string is scanned and operands are parsed and stored in FIELDS.
425 Relocs are queued as we go via other callbacks.
427 ??? Note that this is currently an all-or-nothing parser. If we fail to
428 parse the instruction, we return 0 and the caller will start over from
429 the beginning. Backtracking will be necessary in parsing subexpressions,
430 but that can be handled there. Not handling backtracking here may get
431 expensive in the case of the m68k. Deal with later.
433 Returns NULL for success, an error message for failure. */
436 parse_insn_normal (CGEN_CPU_DESC cd,
437 const CGEN_INSN *insn,
441 /* ??? Runtime added insns not handled yet. */
442 const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
443 const char *str = *strp;
446 const CGEN_SYNTAX_CHAR_TYPE * syn;
447 #ifdef CGEN_MNEMONIC_OPERANDS
452 /* For now we assume the mnemonic is first (there are no leading operands).
453 We can parse it without needing to set up operand parsing.
454 GAS's input scrubber will ensure mnemonics are lowercase, but we may
455 not be called from GAS. */
456 p = CGEN_INSN_MNEMONIC (insn);
457 while (*p && TOLOWER (*p) == TOLOWER (*str))
461 return _("unrecognized instruction");
463 #ifndef CGEN_MNEMONIC_OPERANDS
464 if (* str && ! ISSPACE (* str))
465 return _("unrecognized instruction");
468 CGEN_INIT_PARSE (cd);
469 cgen_init_parse_operand (cd);
470 #ifdef CGEN_MNEMONIC_OPERANDS
474 /* We don't check for (*str != '\0') here because we want to parse
475 any trailing fake arguments in the syntax string. */
476 syn = CGEN_SYNTAX_STRING (syntax);
478 /* Mnemonics come first for now, ensure valid string. */
479 if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
486 /* Non operand chars must match exactly. */
487 if (CGEN_SYNTAX_CHAR_P (* syn))
489 /* FIXME: While we allow for non-GAS callers above, we assume the
490 first char after the mnemonic part is a space. */
491 /* FIXME: We also take inappropriate advantage of the fact that
492 GAS's input scrubber will remove extraneous blanks. */
493 if (TOLOWER (*str) == TOLOWER (CGEN_SYNTAX_CHAR (* syn)))
495 #ifdef CGEN_MNEMONIC_OPERANDS
496 if (CGEN_SYNTAX_CHAR(* syn) == ' ')
504 /* Syntax char didn't match. Can't be this insn. */
505 static char msg [80];
507 /* xgettext:c-format */
508 sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
509 CGEN_SYNTAX_CHAR(*syn), *str);
514 /* Ran out of input. */
515 static char msg [80];
517 /* xgettext:c-format */
518 sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
519 CGEN_SYNTAX_CHAR(*syn));
525 /* We have an operand of some sort. */
526 errmsg = cd->parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
531 /* Done with this operand, continue with next one. */
535 /* If we're at the end of the syntax string, we're done. */
538 /* FIXME: For the moment we assume a valid `str' can only contain
539 blanks now. IE: We needn't try again with a longer version of
540 the insn and it is assumed that longer versions of insns appear
541 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
542 while (ISSPACE (* str))
546 return _("junk at end of line"); /* FIXME: would like to include `str' */
551 /* We couldn't parse it. */
552 return _("unrecognized instruction");
556 This routine is called for each instruction to be assembled.
557 STR points to the insn to be assembled.
558 We assume all necessary tables have been initialized.
559 The assembled instruction, less any fixups, is stored in BUF.
560 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
561 still needs to be converted to target byte order, otherwise BUF is an array
562 of bytes in target byte order.
563 The result is a pointer to the insn's entry in the opcode table,
564 or NULL if an error occured (an error message will have already been
567 Note that when processing (non-alias) macro-insns,
568 this function recurses.
570 ??? It's possible to make this cpu-independent.
571 One would have to deal with a few minor things.
572 At this point in time doing so would be more of a curiosity than useful
573 [for example this file isn't _that_ big], but keeping the possibility in
574 mind helps keep the design clean. */
577 xstormy16_cgen_assemble_insn (CGEN_CPU_DESC cd,
580 CGEN_INSN_BYTES_PTR buf,
584 CGEN_INSN_LIST *ilist;
585 const char *parse_errmsg = NULL;
586 const char *insert_errmsg = NULL;
587 int recognized_mnemonic = 0;
589 /* Skip leading white space. */
590 while (ISSPACE (* str))
593 /* The instructions are stored in hashed lists.
594 Get the first in the list. */
595 ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
597 /* Keep looking until we find a match. */
599 for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
601 const CGEN_INSN *insn = ilist->insn;
602 recognized_mnemonic = 1;
604 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
605 /* Not usually needed as unsupported opcodes
606 shouldn't be in the hash lists. */
607 /* Is this insn supported by the selected cpu? */
608 if (! xstormy16_cgen_insn_supported (cd, insn))
611 /* If the RELAXED attribute is set, this is an insn that shouldn't be
612 chosen immediately. Instead, it is used during assembler/linker
613 relaxation if possible. */
614 if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED) != 0)
619 /* Skip this insn if str doesn't look right lexically. */
620 if (CGEN_INSN_RX (insn) != NULL &&
621 regexec ((regex_t *) CGEN_INSN_RX (insn), str, 0, NULL, 0) == REG_NOMATCH)
624 /* Allow parse/insert handlers to obtain length of insn. */
625 CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
627 parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
628 if (parse_errmsg != NULL)
631 /* ??? 0 is passed for `pc'. */
632 insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
634 if (insert_errmsg != NULL)
637 /* It is up to the caller to actually output the insn and any
643 static char errbuf[150];
644 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
645 const char *tmp_errmsg;
647 /* If requesting verbose error messages, use insert_errmsg.
648 Failing that, use parse_errmsg. */
649 tmp_errmsg = (insert_errmsg ? insert_errmsg :
650 parse_errmsg ? parse_errmsg :
651 recognized_mnemonic ?
652 _("unrecognized form of instruction") :
653 _("unrecognized instruction"));
655 if (strlen (start) > 50)
656 /* xgettext:c-format */
657 sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
659 /* xgettext:c-format */
660 sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
662 if (strlen (start) > 50)
663 /* xgettext:c-format */
664 sprintf (errbuf, _("bad instruction `%.50s...'"), start);
666 /* xgettext:c-format */
667 sprintf (errbuf, _("bad instruction `%.50s'"), start);