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.
34 #include "openrisc-desc.h"
35 #include "openrisc-opc.h"
38 #include "libiberty.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 */
52 #define CGEN_VERBOSE_ASSEMBLER_ERRORS
54 static const char * parse_hi16
55 PARAMS ((CGEN_CPU_DESC
, const char **, int, unsigned long *));
56 static const char * parse_lo16
57 PARAMS ((CGEN_CPU_DESC
, const char **, int, unsigned long *));
60 openrisc_sign_extend_16bit (value
)
63 return (long) (short) value
;
69 parse_hi16 (cd
, strp
, opindex
, valuep
)
73 unsigned long *valuep
;
76 enum cgen_parse_operand_result result_type
;
82 if (strncasecmp (*strp
, "hi(", 3) == 0)
87 errmsg
= cgen_parse_signed_integer (cd
, strp
, opindex
, valuep
);
89 fprintf (stderr
, "parse_hi: %s\n", errmsg
);
92 errmsg
= cgen_parse_address (cd
, strp
, opindex
, BFD_RELOC_HI16
,
93 &result_type
, &value
);
98 && result_type
== CGEN_PARSE_OPERAND_RESULT_NUMBER
)
100 *valuep
= (long) (short) value
;
107 errmsg
= cgen_parse_signed_integer (cd
, strp
, opindex
, (long *) &value
);
109 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, opindex
, (unsigned long *) &value
);
111 *valuep
= (long) (short) (value
& 0xffff);
118 parse_lo16 (cd
, strp
, opindex
, valuep
)
122 unsigned long *valuep
;
125 enum cgen_parse_operand_result result_type
;
131 if (strncasecmp (*strp
, "lo(", 3) == 0)
136 errmsg
= cgen_parse_signed_integer (cd
, strp
, opindex
, valuep
);
138 fprintf (stderr
, "parse_lo: %s\n", errmsg
);
142 errmsg
= cgen_parse_address (cd
, strp
, opindex
, BFD_RELOC_LO16
,
143 &result_type
, &value
);
145 return "missing `)'";
148 && result_type
== CGEN_PARSE_OPERAND_RESULT_NUMBER
)
150 *valuep
= (long) (short) value
;
156 errmsg
= cgen_parse_signed_integer (cd
, strp
, opindex
, (long *) &value
);
158 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, opindex
, (unsigned long *) &value
);
159 *valuep
= (long) (short) (value
& 0xffff);
165 const char * openrisc_cgen_parse_operand
166 PARAMS ((CGEN_CPU_DESC
, int, const char **, CGEN_FIELDS
*));
168 /* Main entry point for operand parsing.
170 This function is basically just a big switch statement. Earlier versions
171 used tables to look up the function to use, but
172 - if the table contains both assembler and disassembler functions then
173 the disassembler contains much of the assembler and vice-versa,
174 - there's a lot of inlining possibilities as things grow,
175 - using a switch statement avoids the function call overhead.
177 This function could be moved into `parse_insn_normal', but keeping it
178 separate makes clear the interface between `parse_insn_normal' and each of
183 openrisc_cgen_parse_operand (cd
, opindex
, strp
, fields
)
187 CGEN_FIELDS
* fields
;
189 const char * errmsg
= NULL
;
190 /* Used by scalar operands that still need to be parsed. */
191 long junk ATTRIBUTE_UNUSED
;
195 case OPENRISC_OPERAND_ABS_26
:
198 errmsg
= cgen_parse_address (cd
, strp
, OPENRISC_OPERAND_ABS_26
, 0, NULL
, & value
);
199 fields
->f_abs26
= value
;
202 case OPENRISC_OPERAND_DISP_26
:
205 errmsg
= cgen_parse_address (cd
, strp
, OPENRISC_OPERAND_DISP_26
, 0, NULL
, & value
);
206 fields
->f_disp26
= value
;
209 case OPENRISC_OPERAND_HI16
:
210 errmsg
= parse_hi16 (cd
, strp
, OPENRISC_OPERAND_HI16
, &fields
->f_simm16
);
212 case OPENRISC_OPERAND_LO16
:
213 errmsg
= parse_lo16 (cd
, strp
, OPENRISC_OPERAND_LO16
, &fields
->f_lo16
);
215 case OPENRISC_OPERAND_OP_F_23
:
216 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, OPENRISC_OPERAND_OP_F_23
, &fields
->f_op4
);
218 case OPENRISC_OPERAND_OP_F_3
:
219 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, OPENRISC_OPERAND_OP_F_3
, &fields
->f_op5
);
221 case OPENRISC_OPERAND_RA
:
222 errmsg
= cgen_parse_keyword (cd
, strp
, & openrisc_cgen_opval_h_gr
, & fields
->f_r2
);
224 case OPENRISC_OPERAND_RB
:
225 errmsg
= cgen_parse_keyword (cd
, strp
, & openrisc_cgen_opval_h_gr
, & fields
->f_r3
);
227 case OPENRISC_OPERAND_RD
:
228 errmsg
= cgen_parse_keyword (cd
, strp
, & openrisc_cgen_opval_h_gr
, & fields
->f_r1
);
230 case OPENRISC_OPERAND_SIMM_16
:
231 errmsg
= cgen_parse_signed_integer (cd
, strp
, OPENRISC_OPERAND_SIMM_16
, &fields
->f_simm16
);
233 case OPENRISC_OPERAND_UI16NC
:
234 errmsg
= parse_lo16 (cd
, strp
, OPENRISC_OPERAND_UI16NC
, &fields
->f_i16nc
);
236 case OPENRISC_OPERAND_UIMM_16
:
237 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, OPENRISC_OPERAND_UIMM_16
, &fields
->f_uimm16
);
239 case OPENRISC_OPERAND_UIMM_5
:
240 errmsg
= cgen_parse_unsigned_integer (cd
, strp
, OPENRISC_OPERAND_UIMM_5
, &fields
->f_uimm5
);
244 /* xgettext:c-format */
245 fprintf (stderr
, _("Unrecognized field %d while parsing.\n"), opindex
);
252 cgen_parse_fn
* const openrisc_cgen_parse_handlers
[] =
258 openrisc_cgen_init_asm (cd
)
261 openrisc_cgen_init_opcode_table (cd
);
262 openrisc_cgen_init_ibld_table (cd
);
263 cd
->parse_handlers
= & openrisc_cgen_parse_handlers
[0];
264 cd
->parse_operand
= openrisc_cgen_parse_operand
;
270 Regex construction routine.
272 This translates an opcode syntax string into a regex string,
273 by replacing any non-character syntax element (such as an
274 opcode) with the pattern '.*'
276 It then compiles the regex and stores it in the opcode, for
277 later use by openrisc_cgen_assemble_insn
279 Returns NULL for success, an error message for failure. */
282 openrisc_cgen_build_insn_regex (insn
)
285 CGEN_OPCODE
*opc
= (CGEN_OPCODE
*) CGEN_INSN_OPCODE (insn
);
286 const char *mnem
= CGEN_INSN_MNEMONIC (insn
);
288 char rxbuf
[CGEN_MAX_RX_ELEMENTS
];
290 const CGEN_SYNTAX_CHAR_TYPE
*syn
;
293 syn
= CGEN_SYNTAX_STRING (CGEN_OPCODE_SYNTAX (opc
));
295 /* Mnemonics come first in the syntax string. */
296 if (! CGEN_SYNTAX_MNEMONIC_P (* syn
))
297 return _("missing mnemonic in syntax string");
300 /* Generate a case sensitive regular expression that emulates case
301 insensitive matching in the "C" locale. We cannot generate a case
302 insensitive regular expression because in Turkish locales, 'i' and 'I'
303 are not equal modulo case conversion. */
305 /* Copy the literal mnemonic out of the insn. */
306 for (; *mnem
; mnem
++)
321 /* Copy any remaining literals from the syntax string into the rx. */
322 for(; * syn
!= 0 && rx
<= rxbuf
+ (CGEN_MAX_RX_ELEMENTS
- 7 - 4); ++syn
)
324 if (CGEN_SYNTAX_CHAR_P (* syn
))
326 char c
= CGEN_SYNTAX_CHAR (* syn
);
330 /* Escape any regex metacharacters in the syntax. */
331 case '.': case '[': case '\\':
332 case '*': case '^': case '$':
334 #ifdef CGEN_ESCAPE_EXTENDED_REGEX
335 case '?': case '{': case '}':
336 case '(': case ')': case '*':
337 case '|': case '+': case ']':
356 /* Insert syntax char into rx. */
361 /* Replace non-syntax fields with globs. */
367 /* Trailing whitespace ok. */
374 /* But anchor it after that. */
378 CGEN_INSN_RX (insn
) = xmalloc (sizeof (regex_t
));
379 reg_err
= regcomp ((regex_t
*) CGEN_INSN_RX (insn
), rxbuf
, REG_NOSUB
);
387 regerror (reg_err
, (regex_t
*) CGEN_INSN_RX (insn
), msg
, 80);
388 regfree ((regex_t
*) CGEN_INSN_RX (insn
));
389 free (CGEN_INSN_RX (insn
));
390 (CGEN_INSN_RX (insn
)) = NULL
;
396 /* Default insn parser.
398 The syntax string is scanned and operands are parsed and stored in FIELDS.
399 Relocs are queued as we go via other callbacks.
401 ??? Note that this is currently an all-or-nothing parser. If we fail to
402 parse the instruction, we return 0 and the caller will start over from
403 the beginning. Backtracking will be necessary in parsing subexpressions,
404 but that can be handled there. Not handling backtracking here may get
405 expensive in the case of the m68k. Deal with later.
407 Returns NULL for success, an error message for failure. */
410 parse_insn_normal (cd
, insn
, strp
, fields
)
412 const CGEN_INSN
*insn
;
416 /* ??? Runtime added insns not handled yet. */
417 const CGEN_SYNTAX
*syntax
= CGEN_INSN_SYNTAX (insn
);
418 const char *str
= *strp
;
421 const CGEN_SYNTAX_CHAR_TYPE
* syn
;
422 #ifdef CGEN_MNEMONIC_OPERANDS
427 /* For now we assume the mnemonic is first (there are no leading operands).
428 We can parse it without needing to set up operand parsing.
429 GAS's input scrubber will ensure mnemonics are lowercase, but we may
430 not be called from GAS. */
431 p
= CGEN_INSN_MNEMONIC (insn
);
432 while (*p
&& tolower (*p
) == tolower (*str
))
436 return _("unrecognized instruction");
438 #ifndef CGEN_MNEMONIC_OPERANDS
439 if (* str
&& !isspace (* str
))
440 return _("unrecognized instruction");
443 CGEN_INIT_PARSE (cd
);
444 cgen_init_parse_operand (cd
);
445 #ifdef CGEN_MNEMONIC_OPERANDS
449 /* We don't check for (*str != '\0') here because we want to parse
450 any trailing fake arguments in the syntax string. */
451 syn
= CGEN_SYNTAX_STRING (syntax
);
453 /* Mnemonics come first for now, ensure valid string. */
454 if (! CGEN_SYNTAX_MNEMONIC_P (* syn
))
461 /* Non operand chars must match exactly. */
462 if (CGEN_SYNTAX_CHAR_P (* syn
))
464 /* FIXME: While we allow for non-GAS callers above, we assume the
465 first char after the mnemonic part is a space. */
466 /* FIXME: We also take inappropriate advantage of the fact that
467 GAS's input scrubber will remove extraneous blanks. */
468 if (tolower (*str
) == tolower (CGEN_SYNTAX_CHAR (* syn
)))
470 #ifdef CGEN_MNEMONIC_OPERANDS
471 if (CGEN_SYNTAX_CHAR(* syn
) == ' ')
479 /* Syntax char didn't match. Can't be this insn. */
480 static char msg
[80];
482 /* xgettext:c-format */
483 sprintf (msg
, _("syntax error (expected char `%c', found `%c')"),
484 CGEN_SYNTAX_CHAR(*syn
), *str
);
489 /* Ran out of input. */
490 static char msg
[80];
492 /* xgettext:c-format */
493 sprintf (msg
, _("syntax error (expected char `%c', found end of instruction)"),
494 CGEN_SYNTAX_CHAR(*syn
));
500 /* We have an operand of some sort. */
501 errmsg
= openrisc_cgen_parse_operand (cd
, CGEN_SYNTAX_FIELD (*syn
),
506 /* Done with this operand, continue with next one. */
510 /* If we're at the end of the syntax string, we're done. */
513 /* FIXME: For the moment we assume a valid `str' can only contain
514 blanks now. IE: We needn't try again with a longer version of
515 the insn and it is assumed that longer versions of insns appear
516 before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3). */
517 while (isspace (* str
))
521 return _("junk at end of line"); /* FIXME: would like to include `str' */
526 /* We couldn't parse it. */
527 return _("unrecognized instruction");
531 This routine is called for each instruction to be assembled.
532 STR points to the insn to be assembled.
533 We assume all necessary tables have been initialized.
534 The assembled instruction, less any fixups, is stored in BUF.
535 Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
536 still needs to be converted to target byte order, otherwise BUF is an array
537 of bytes in target byte order.
538 The result is a pointer to the insn's entry in the opcode table,
539 or NULL if an error occured (an error message will have already been
542 Note that when processing (non-alias) macro-insns,
543 this function recurses.
545 ??? It's possible to make this cpu-independent.
546 One would have to deal with a few minor things.
547 At this point in time doing so would be more of a curiosity than useful
548 [for example this file isn't _that_ big], but keeping the possibility in
549 mind helps keep the design clean. */
552 openrisc_cgen_assemble_insn (cd
, str
, fields
, buf
, errmsg
)
556 CGEN_INSN_BYTES_PTR buf
;
560 CGEN_INSN_LIST
*ilist
;
561 const char *parse_errmsg
= NULL
;
562 const char *insert_errmsg
= NULL
;
563 int recognized_mnemonic
= 0;
565 /* Skip leading white space. */
566 while (isspace (* str
))
569 /* The instructions are stored in hashed lists.
570 Get the first in the list. */
571 ilist
= CGEN_ASM_LOOKUP_INSN (cd
, str
);
573 /* Keep looking until we find a match. */
575 for ( ; ilist
!= NULL
; ilist
= CGEN_ASM_NEXT_INSN (ilist
))
577 const CGEN_INSN
*insn
= ilist
->insn
;
578 recognized_mnemonic
= 1;
580 #ifdef CGEN_VALIDATE_INSN_SUPPORTED
581 /* Not usually needed as unsupported opcodes
582 shouldn't be in the hash lists. */
583 /* Is this insn supported by the selected cpu? */
584 if (! openrisc_cgen_insn_supported (cd
, insn
))
587 /* If the RELAX attribute is set, this is an insn that shouldn't be
588 chosen immediately. Instead, it is used during assembler/linker
589 relaxation if possible. */
590 if (CGEN_INSN_ATTR_VALUE (insn
, CGEN_INSN_RELAX
) != 0)
595 /* Skip this insn if str doesn't look right lexically. */
596 if (CGEN_INSN_RX (insn
) != NULL
&&
597 regexec ((regex_t
*) CGEN_INSN_RX (insn
), str
, 0, NULL
, 0) == REG_NOMATCH
)
600 /* Allow parse/insert handlers to obtain length of insn. */
601 CGEN_FIELDS_BITSIZE (fields
) = CGEN_INSN_BITSIZE (insn
);
603 parse_errmsg
= CGEN_PARSE_FN (cd
, insn
) (cd
, insn
, & str
, fields
);
604 if (parse_errmsg
!= NULL
)
607 /* ??? 0 is passed for `pc'. */
608 insert_errmsg
= CGEN_INSERT_FN (cd
, insn
) (cd
, insn
, fields
, buf
,
610 if (insert_errmsg
!= NULL
)
613 /* It is up to the caller to actually output the insn and any
619 static char errbuf
[150];
620 #ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
621 const char *tmp_errmsg
;
623 /* If requesting verbose error messages, use insert_errmsg.
624 Failing that, use parse_errmsg. */
625 tmp_errmsg
= (insert_errmsg
? insert_errmsg
:
626 parse_errmsg
? parse_errmsg
:
627 recognized_mnemonic
?
628 _("unrecognized form of instruction") :
629 _("unrecognized instruction"));
631 if (strlen (start
) > 50)
632 /* xgettext:c-format */
633 sprintf (errbuf
, "%s `%.50s...'", tmp_errmsg
, start
);
635 /* xgettext:c-format */
636 sprintf (errbuf
, "%s `%.50s'", tmp_errmsg
, start
);
638 if (strlen (start
) > 50)
639 /* xgettext:c-format */
640 sprintf (errbuf
, _("bad instruction `%.50s...'"), start
);
642 /* xgettext:c-format */
643 sprintf (errbuf
, _("bad instruction `%.50s'"), start
);
651 #if 0 /* This calls back to GAS which we can't do without care. */
653 /* Record each member of OPVALS in the assembler's symbol table.
654 This lets GAS parse registers for us.
655 ??? Interesting idea but not currently used. */
657 /* Record each member of OPVALS in the assembler's symbol table.
658 FIXME: Not currently used. */
661 openrisc_cgen_asm_hash_keywords (cd
, opvals
)
663 CGEN_KEYWORD
*opvals
;
665 CGEN_KEYWORD_SEARCH search
= cgen_keyword_search_init (opvals
, NULL
);
666 const CGEN_KEYWORD_ENTRY
* ke
;
668 while ((ke
= cgen_keyword_search_next (& search
)) != NULL
)
670 #if 0 /* Unnecessary, should be done in the search routine. */
671 if (! openrisc_cgen_opval_supported (ke
))
674 cgen_asm_record_register (cd
, ke
->name
, ke
->value
);