OpenCores
URL https://opencores.org/ocsvn/or1k_old/or1k_old/trunk

Subversion Repositories or1k_old

[/] [or1k_old/] [trunk/] [insight/] [opcodes/] [cgen-asm.in] - Blame information for rev 1782

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 578 markom
/* Assembler interface for targets using CGEN. -*- C -*-
2
   CGEN: Cpu tools GENerator
3
 
4
THIS FILE IS MACHINE GENERATED WITH CGEN.
5
- the resultant file is machine generated, cgen-asm.in isn't
6
 
7
Copyright 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
8
 
9
This file is part of the GNU Binutils and GDB, the GNU debugger.
10
 
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)
14
any later version.
15
 
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.
20
 
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.  */
24
 
25
/* ??? Eventually more and more of this stuff can go to cpu-independent files.
26
   Keep that in mind.  */
27
 
28
#include "sysdep.h"
29
#include 
30
#include 
31
#include "ansidecl.h"
32
#include "bfd.h"
33
#include "symcat.h"
34
#include "@prefix@-desc.h"
35
#include "@prefix@-opc.h"
36
#include "opintl.h"
37
 
38
#undef min
39
#define min(a,b) ((a) < (b) ? (a) : (b))
40
#undef max
41
#define max(a,b) ((a) > (b) ? (a) : (b))
42
 
43
static const char * parse_insn_normal
44
     PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, const char **, CGEN_FIELDS *));
45
 
46
/* -- assembler routines inserted here */
47
 
48
/* Default insn parser.
49
 
50
   The syntax string is scanned and operands are parsed and stored in FIELDS.
51
   Relocs are queued as we go via other callbacks.
52
 
53
   ??? Note that this is currently an all-or-nothing parser.  If we fail to
54
   parse the instruction, we return 0 and the caller will start over from
55
   the beginning.  Backtracking will be necessary in parsing subexpressions,
56
   but that can be handled there.  Not handling backtracking here may get
57
   expensive in the case of the m68k.  Deal with later.
58
 
59
   Returns NULL for success, an error message for failure.
60
*/
61
 
62
static const char *
63
parse_insn_normal (cd, insn, strp, fields)
64
     CGEN_CPU_DESC cd;
65
     const CGEN_INSN *insn;
66
     const char **strp;
67
     CGEN_FIELDS *fields;
68
{
69
  /* ??? Runtime added insns not handled yet.  */
70
  const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
71
  const char *str = *strp;
72
  const char *errmsg;
73
  const char *p;
74
  const CGEN_SYNTAX_CHAR_TYPE * syn;
75
#ifdef CGEN_MNEMONIC_OPERANDS
76
  /* FIXME: wip */
77
  int past_opcode_p;
78
#endif
79
 
80
  /* For now we assume the mnemonic is first (there are no leading operands).
81
     We can parse it without needing to set up operand parsing.
82
     GAS's input scrubber will ensure mnemonics are lowercase, but we may
83
     not be called from GAS.  */
84
  p = CGEN_INSN_MNEMONIC (insn);
85
  while (*p && tolower (*p) == tolower (*str))
86
    ++p, ++str;
87
 
88
  if (* p)
89
    return _("unrecognized instruction");
90
 
91
#ifndef CGEN_MNEMONIC_OPERANDS
92
  if (* str && !isspace (* str))
93
    return _("unrecognized instruction");
94
#endif
95
 
96
  CGEN_INIT_PARSE (cd);
97
  cgen_init_parse_operand (cd);
98
#ifdef CGEN_MNEMONIC_OPERANDS
99
  past_opcode_p = 0;
100
#endif
101
 
102
  /* We don't check for (*str != '\0') here because we want to parse
103
     any trailing fake arguments in the syntax string.  */
104
  syn = CGEN_SYNTAX_STRING (syntax);
105
 
106
  /* Mnemonics come first for now, ensure valid string.  */
107
  if (! CGEN_SYNTAX_MNEMONIC_P (* syn))
108
    abort ();
109
 
110
  ++syn;
111
 
112
  while (* syn != 0)
113
    {
114
      /* Non operand chars must match exactly.  */
115
      if (CGEN_SYNTAX_CHAR_P (* syn))
116
        {
117
          /* FIXME: While we allow for non-GAS callers above, we assume the
118
             first char after the mnemonic part is a space.  */
119
          /* FIXME: We also take inappropriate advantage of the fact that
120
             GAS's input scrubber will remove extraneous blanks.  */
121
          if (tolower (*str) == tolower (CGEN_SYNTAX_CHAR (* syn)))
122
            {
123
#ifdef CGEN_MNEMONIC_OPERANDS
124
              if (CGEN_SYNTAX_CHAR(* syn) == ' ')
125
                past_opcode_p = 1;
126
#endif
127
              ++ syn;
128
              ++ str;
129
            }
130
          else if (*str)
131
            {
132
              /* Syntax char didn't match.  Can't be this insn.  */
133
              static char msg [80];
134
              /* xgettext:c-format */
135
              sprintf (msg, _("syntax error (expected char `%c', found `%c')"),
136
                       CGEN_SYNTAX_CHAR(*syn), *str);
137
              return msg;
138
            }
139
          else
140
            {
141
              /* Ran out of input.  */
142
              static char msg [80];
143
              /* xgettext:c-format */
144
              sprintf (msg, _("syntax error (expected char `%c', found end of instruction)"),
145
                       CGEN_SYNTAX_CHAR(*syn));
146
              return msg;
147
            }
148
          continue;
149
        }
150
 
151
      /* We have an operand of some sort.  */
152
      errmsg = @arch@_cgen_parse_operand (cd, CGEN_SYNTAX_FIELD (*syn),
153
                                          &str, fields);
154
      if (errmsg)
155
        return errmsg;
156
 
157
      /* Done with this operand, continue with next one.  */
158
      ++ syn;
159
    }
160
 
161
  /* If we're at the end of the syntax string, we're done.  */
162
  if (* syn == 0)
163
    {
164
      /* FIXME: For the moment we assume a valid `str' can only contain
165
         blanks now.  IE: We needn't try again with a longer version of
166
         the insn and it is assumed that longer versions of insns appear
167
         before shorter ones (eg: lsr r2,r3,1 vs lsr r2,r3).  */
168
      while (isspace (* str))
169
        ++ str;
170
 
171
      if (* str != '\0')
172
        return _("junk at end of line"); /* FIXME: would like to include `str' */
173
 
174
      return NULL;
175
    }
176
 
177
  /* We couldn't parse it.  */
178
  return _("unrecognized instruction");
179
}
180
 
181
/* Main entry point.
182
   This routine is called for each instruction to be assembled.
183
   STR points to the insn to be assembled.
184
   We assume all necessary tables have been initialized.
185
   The assembled instruction, less any fixups, is stored in BUF.
186
   Remember that if CGEN_INT_INSN_P then BUF is an int and thus the value
187
   still needs to be converted to target byte order, otherwise BUF is an array
188
   of bytes in target byte order.
189
   The result is a pointer to the insn's entry in the opcode table,
190
   or NULL if an error occured (an error message will have already been
191
   printed).
192
 
193
   Note that when processing (non-alias) macro-insns,
194
   this function recurses.
195
 
196
   ??? It's possible to make this cpu-independent.
197
   One would have to deal with a few minor things.
198
   At this point in time doing so would be more of a curiosity than useful
199
   [for example this file isn't _that_ big], but keeping the possibility in
200
   mind helps keep the design clean.  */
201
 
202
const CGEN_INSN *
203
@arch@_cgen_assemble_insn (cd, str, fields, buf, errmsg)
204
     CGEN_CPU_DESC cd;
205
     const char *str;
206
     CGEN_FIELDS *fields;
207
     CGEN_INSN_BYTES_PTR buf;
208
     char **errmsg;
209
{
210
  const char *start;
211
  CGEN_INSN_LIST *ilist;
212
  const char *parse_errmsg = NULL;
213
  const char *insert_errmsg = NULL;
214
 
215
  /* Skip leading white space.  */
216
  while (isspace (* str))
217
    ++ str;
218
 
219
  /* The instructions are stored in hashed lists.
220
     Get the first in the list.  */
221
  ilist = CGEN_ASM_LOOKUP_INSN (cd, str);
222
 
223
  /* Keep looking until we find a match.  */
224
 
225
  start = str;
226
  for ( ; ilist != NULL ; ilist = CGEN_ASM_NEXT_INSN (ilist))
227
    {
228
      const CGEN_INSN *insn = ilist->insn;
229
 
230
#ifdef CGEN_VALIDATE_INSN_SUPPORTED
231
      /* not usually needed as unsupported opcodes shouldn't be in the hash lists */
232
      /* Is this insn supported by the selected cpu?  */
233
      if (! @arch@_cgen_insn_supported (cd, insn))
234
        continue;
235
#endif
236
 
237
      /* If the RELAX attribute is set, this is an insn that shouldn't be
238
         chosen immediately.  Instead, it is used during assembler/linker
239
         relaxation if possible.  */
240
      if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX) != 0)
241
        continue;
242
 
243
      str = start;
244
 
245
      /* Allow parse/insert handlers to obtain length of insn.  */
246
      CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
247
 
248
      parse_errmsg = CGEN_PARSE_FN (cd, insn) (cd, insn, & str, fields);
249
      if (parse_errmsg != NULL)
250
        continue;
251
 
252
      /* ??? 0 is passed for `pc' */
253
      insert_errmsg = CGEN_INSERT_FN (cd, insn) (cd, insn, fields, buf,
254
                                                 (bfd_vma) 0);
255
      if (insert_errmsg != NULL)
256
        continue;
257
 
258
      /* It is up to the caller to actually output the insn and any
259
         queued relocs.  */
260
      return insn;
261
    }
262
 
263
  {
264
    static char errbuf[150];
265
#ifdef CGEN_VERBOSE_ASSEMBLER_ERRORS
266
    const char *tmp_errmsg;
267
 
268
    /* If requesting verbose error messages, use insert_errmsg.
269
       Failing that, use parse_errmsg */
270
    tmp_errmsg = (insert_errmsg ? insert_errmsg :
271
                  parse_errmsg ? parse_errmsg :
272
                  _("unrecognized instruction"));
273
 
274
    if (strlen (start) > 50)
275
      /* xgettext:c-format */
276
      sprintf (errbuf, "%s `%.50s...'", tmp_errmsg, start);
277
    else
278
      /* xgettext:c-format */
279
      sprintf (errbuf, "%s `%.50s'", tmp_errmsg, start);
280
#else
281
    if (strlen (start) > 50)
282
      /* xgettext:c-format */
283
      sprintf (errbuf, _("bad instruction `%.50s...'"), start);
284
    else
285
      /* xgettext:c-format */
286
      sprintf (errbuf, _("bad instruction `%.50s'"), start);
287
#endif
288
 
289
    *errmsg = errbuf;
290
    return NULL;
291
  }
292
}
293
 
294
#if 0 /* This calls back to GAS which we can't do without care.  */
295
 
296
/* Record each member of OPVALS in the assembler's symbol table.
297
   This lets GAS parse registers for us.
298
   ??? Interesting idea but not currently used.  */
299
 
300
/* Record each member of OPVALS in the assembler's symbol table.
301
   FIXME: Not currently used.  */
302
 
303
void
304
@arch@_cgen_asm_hash_keywords (cd, opvals)
305
     CGEN_CPU_DESC cd;
306
     CGEN_KEYWORD *opvals;
307
{
308
  CGEN_KEYWORD_SEARCH search = cgen_keyword_search_init (opvals, NULL);
309
  const CGEN_KEYWORD_ENTRY * ke;
310
 
311
  while ((ke = cgen_keyword_search_next (& search)) != NULL)
312
    {
313
#if 0 /* Unnecessary, should be done in the search routine.  */
314
      if (! @arch@_cgen_opval_supported (ke))
315
        continue;
316
#endif
317
      cgen_asm_record_register (cd, ke->name, ke->value);
318
    }
319
}
320
 
321
#endif /* 0 */

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.