aboutsummaryrefslogtreecommitdiff
path: root/opcodes/cgen-asm.c
blob: 7231e2d7aedfded367f70cfb8de7ffdae28a6296 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
/* CGEN generic assembler support code.

   Copyright 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.

   This file is part of the GNU Binutils and GDB, the GNU debugger.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License along
   with this program; if not, write to the Free Software Foundation, Inc.,
   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

#include "sysdep.h"
#include <stdio.h>
#include "ansidecl.h"
#include "libiberty.h"
#include "safe-ctype.h"
#include "bfd.h"
#include "symcat.h"
#include "opcode/cgen.h"
#include "opintl.h"

static CGEN_INSN_LIST *  hash_insn_array      (CGEN_CPU_DESC, const CGEN_INSN *, int, int, CGEN_INSN_LIST **, CGEN_INSN_LIST *);
static CGEN_INSN_LIST *  hash_insn_list       (CGEN_CPU_DESC, const CGEN_INSN_LIST *, CGEN_INSN_LIST **, CGEN_INSN_LIST *);
static void              build_asm_hash_table (CGEN_CPU_DESC);

/* Set the cgen_parse_operand_fn callback.  */

void
cgen_set_parse_operand_fn (CGEN_CPU_DESC cd, cgen_parse_operand_fn fn)
{
  cd->parse_operand_fn = fn;
}

/* Called whenever starting to parse an insn.  */

void
cgen_init_parse_operand (CGEN_CPU_DESC cd)
{
  /* This tells the callback to re-initialize.  */
  (void) (* cd->parse_operand_fn)
    (cd, CGEN_PARSE_OPERAND_INIT, NULL, 0, 0, NULL, NULL);
}

/* Subroutine of build_asm_hash_table to add INSNS to the hash table.

   COUNT is the number of elements in INSNS.
   ENTSIZE is sizeof (CGEN_IBASE) for the target.
   ??? No longer used but leave in for now.
   HTABLE points to the hash table.
   HENTBUF is a pointer to sufficiently large buffer of hash entries.
   The result is a pointer to the next entry to use.

   The table is scanned backwards as additions are made to the front of the
   list and we want earlier ones to be prefered.  */

static CGEN_INSN_LIST *
hash_insn_array (CGEN_CPU_DESC cd,
		 const CGEN_INSN *insns,
		 int count,
		 int entsize ATTRIBUTE_UNUSED,
		 CGEN_INSN_LIST **htable,
		 CGEN_INSN_LIST *hentbuf)
{
  int i;

  for (i = count - 1; i >= 0; --i, ++hentbuf)
    {
      unsigned int hash;
      const CGEN_INSN *insn = &insns[i];

      if (! (* cd->asm_hash_p) (insn))
	continue;
      hash = (* cd->asm_hash) (CGEN_INSN_MNEMONIC (insn));
      hentbuf->next = htable[hash];
      hentbuf->insn = insn;
      htable[hash] = hentbuf;
    }

  return hentbuf;
}

/* Subroutine of build_asm_hash_table to add INSNS to the hash table.
   This function is identical to hash_insn_array except the insns are
   in a list.  */

static CGEN_INSN_LIST *
hash_insn_list (CGEN_CPU_DESC cd,
		const CGEN_INSN_LIST *insns,
		CGEN_INSN_LIST **htable,
		CGEN_INSN_LIST *hentbuf)
{
  const CGEN_INSN_LIST *ilist;

  for (ilist = insns; ilist != NULL; ilist = ilist->next, ++ hentbuf)
    {
      unsigned int hash;

      if (! (* cd->asm_hash_p) (ilist->insn))
	continue;
      hash = (* cd->asm_hash) (CGEN_INSN_MNEMONIC (ilist->insn));
      hentbuf->next = htable[hash];
      hentbuf->insn = ilist->insn;
      htable[hash] = hentbuf;
    }

  return hentbuf;
}

/* Build the assembler instruction hash table.  */

static void
build_asm_hash_table (CGEN_CPU_DESC cd)
{
  int count = cgen_insn_count (cd) + cgen_macro_insn_count (cd);
  CGEN_INSN_TABLE *insn_table = &cd->insn_table;
  CGEN_INSN_TABLE *macro_insn_table = &cd->macro_insn_table;
  unsigned int hash_size = cd->asm_hash_size;
  CGEN_INSN_LIST *hash_entry_buf;
  CGEN_INSN_LIST **asm_hash_table;
  CGEN_INSN_LIST *asm_hash_table_entries;

  /* The space allocated for the hash table consists of two parts:
     the hash table and the hash lists.  */

  asm_hash_table = (CGEN_INSN_LIST **)
    xmalloc (hash_size * sizeof (CGEN_INSN_LIST *));
  memset (asm_hash_table, 0, hash_size * sizeof (CGEN_INSN_LIST *));
  asm_hash_table_entries = hash_entry_buf = (CGEN_INSN_LIST *)
    xmalloc (count * sizeof (CGEN_INSN_LIST));

  /* Add compiled in insns.
     Don't include the first one as it is a reserved entry.  */
  /* ??? It was the end of all hash chains, and also the special
     "invalid insn" marker.  May be able to do it differently now.  */

  hash_entry_buf = hash_insn_array (cd,
				    insn_table->init_entries + 1,
				    insn_table->num_init_entries - 1,
				    insn_table->entry_size,
				    asm_hash_table, hash_entry_buf);

  /* Add compiled in macro-insns.  */

  hash_entry_buf = hash_insn_array (cd, macro_insn_table->init_entries,
				    macro_insn_table->num_init_entries,
				    macro_insn_table->entry_size,
				    asm_hash_table, hash_entry_buf);

  /* Add runtime added insns.
     Later added insns will be prefered over earlier ones.  */

  hash_entry_buf = hash_insn_list (cd, insn_table->new_entries,
				   asm_hash_table, hash_entry_buf);

  /* Add runtime added macro-insns.  */

  hash_insn_list (cd, macro_insn_table->new_entries,
		  asm_hash_table, hash_entry_buf);

  cd->asm_hash_table = asm_hash_table;
  cd->asm_hash_table_entries = asm_hash_table_entries;
}

/* Return the first entry in the hash list for INSN.  */

CGEN_INSN_LIST *
cgen_asm_lookup_insn (CGEN_CPU_DESC cd, const char *insn)
{
  unsigned int hash;

  if (cd->asm_hash_table == NULL)
    build_asm_hash_table (cd);

  hash = (* cd->asm_hash) (insn);
  return cd->asm_hash_table[hash];
}

/* Keyword parser.
   The result is NULL upon success or an error message.
   If successful, *STRP is updated to point passed the keyword.

   ??? At present we have a static notion of how to pick out a keyword.
   Later we can allow a target to customize this if necessary [say by
   recording something in the keyword table].  */

const char *
cgen_parse_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
		    const char **strp,
		    CGEN_KEYWORD *keyword_table,
		    long *valuep)
{
  const CGEN_KEYWORD_ENTRY *ke;
  char buf[256];
  const char *p,*start;

  if (keyword_table->name_hash_table == NULL)
    (void) cgen_keyword_search_init (keyword_table, NULL);

  p = start = *strp;

  /* Allow any first character.  This is to make life easier for
     the fairly common case of suffixes, eg. 'ld.b.w', where the first
     character of the suffix ('.') is special.  */
  if (*p)
    ++p;
  
  /* Allow letters, digits, and any special characters.  */
  while (((p - start) < (int) sizeof (buf))
	 && *p
	 && (ISALNUM (*p)
	     || *p == '_'
	     || strchr (keyword_table->nonalpha_chars, *p)))
    ++p;

  if (p - start >= (int) sizeof (buf))
    {
      /* All non-empty CGEN keywords can fit into BUF.  The only thing
	 we can match here is the empty keyword.  */
      buf[0] = 0;
    }
  else
    {
      memcpy (buf, start, p - start);
      buf[p - start] = 0;
    }

  ke = cgen_keyword_lookup_name (keyword_table, buf);

  if (ke != NULL)
    {
      *valuep = ke->value;
      /* Don't advance pointer if we recognized the null keyword.  */
      if (ke->name[0] != 0)
	*strp = p;
      return NULL;
    }

  return "unrecognized keyword/register name";
}

/* Parse a small signed integer parser.
   ??? VALUEP is not a bfd_vma * on purpose, though this is confusing.
   Note that if the caller expects a bfd_vma result, it should call
   cgen_parse_address.  */

const char *
cgen_parse_signed_integer (CGEN_CPU_DESC cd,
			   const char **strp,
			   int opindex,
			   long *valuep)
{
  bfd_vma value;
  enum cgen_parse_operand_result result;
  const char *errmsg;

  errmsg = (* cd->parse_operand_fn)
    (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
     &result, &value);
  /* FIXME: Examine `result'.  */
  if (!errmsg)
    *valuep = value;
  return errmsg;
}

/* Parse a small unsigned integer parser.
   ??? VALUEP is not a bfd_vma * on purpose, though this is confusing.
   Note that if the caller expects a bfd_vma result, it should call
   cgen_parse_address.  */

const char *
cgen_parse_unsigned_integer (CGEN_CPU_DESC cd,
			     const char **strp,
			     int opindex,
			     unsigned long *valuep)
{
  bfd_vma value;
  enum cgen_parse_operand_result result;
  const char *errmsg;

  errmsg = (* cd->parse_operand_fn)
    (cd, CGEN_PARSE_OPERAND_INTEGER, strp, opindex, BFD_RELOC_NONE,
     &result, &value);
  /* FIXME: Examine `result'.  */
  if (!errmsg)
    *valuep = value;
  return errmsg;
}

/* Address parser.  */

const char *
cgen_parse_address (CGEN_CPU_DESC cd,
		    const char **strp,
		    int opindex,
		    int opinfo,
		    enum cgen_parse_operand_result *resultp,
		    bfd_vma *valuep)
{
  bfd_vma value;
  enum cgen_parse_operand_result result_type;
  const char *errmsg;

  errmsg = (* cd->parse_operand_fn)
    (cd, CGEN_PARSE_OPERAND_ADDRESS, strp, opindex, opinfo,
     &result_type, &value);
  /* FIXME: Examine `result'.  */
  if (!errmsg)
    {
      if (resultp != NULL)
	*resultp = result_type;
      *valuep = value;
    }
  return errmsg;
}

/* Signed integer validation routine.  */

const char *
cgen_validate_signed_integer (long value, long min, long max)
{
  if (value < min || value > max)
    {
      static char buf[100];

      /* xgettext:c-format */
      sprintf (buf, _("operand out of range (%ld not between %ld and %ld)"),
		      value, min, max);
      return buf;
    }

  return NULL;
}

/* Unsigned integer validation routine.
   Supplying `min' here may seem unnecessary, but we also want to handle
   cases where min != 0 (and max > LONG_MAX).  */

const char *
cgen_validate_unsigned_integer (unsigned long value,
				unsigned long min,
				unsigned long max)
{
  if (value < min || value > max)
    {
      static char buf[100];

      /* xgettext:c-format */
      sprintf (buf, _("operand out of range (%lu not between %lu and %lu)"),
	       value, min, max);
      return buf;
    }

  return NULL;
}