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

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-old/] [binutils-2.18.50/] [opcodes/] [openrisc-ibld.c] - Blame information for rev 816

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 38 julius
/* Instruction building/extraction support for openrisc. -*- C -*-
2
 
3
   THIS FILE IS MACHINE GENERATED WITH CGEN: Cpu tools GENerator.
4
   - the resultant file is machine generated, cgen-ibld.in isn't
5
 
6
   Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2005, 2006, 2007
7
   Free Software Foundation, Inc.
8
 
9
   This file is part of libopcodes.
10
 
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)
14
   any later version.
15
 
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.
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
   51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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 <stdio.h>
30
#include "ansidecl.h"
31
#include "dis-asm.h"
32
#include "bfd.h"
33
#include "symcat.h"
34
#include "openrisc-desc.h"
35
#include "openrisc-opc.h"
36
#include "opintl.h"
37
#include "safe-ctype.h"
38
 
39
#undef  min
40
#define min(a,b) ((a) < (b) ? (a) : (b))
41
#undef  max
42
#define max(a,b) ((a) > (b) ? (a) : (b))
43
 
44
/* Used by the ifield rtx function.  */
45
#define FLD(f) (fields->f)
46
 
47
static const char * insert_normal
48
  (CGEN_CPU_DESC, long, unsigned int, unsigned int, unsigned int,
49
   unsigned int, unsigned int, unsigned int, CGEN_INSN_BYTES_PTR);
50
static const char * insert_insn_normal
51
  (CGEN_CPU_DESC, const CGEN_INSN *,
52
   CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
53
static int extract_normal
54
  (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_INT,
55
   unsigned int, unsigned int, unsigned int, unsigned int,
56
   unsigned int, unsigned int, bfd_vma, long *);
57
static int extract_insn_normal
58
  (CGEN_CPU_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *,
59
   CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
60
#if CGEN_INT_INSN_P
61
static void put_insn_int_value
62
  (CGEN_CPU_DESC, CGEN_INSN_BYTES_PTR, int, int, CGEN_INSN_INT);
63
#endif
64
#if ! CGEN_INT_INSN_P
65
static CGEN_INLINE void insert_1
66
  (CGEN_CPU_DESC, unsigned long, int, int, int, unsigned char *);
67
static CGEN_INLINE int fill_cache
68
  (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *,  int, int, bfd_vma);
69
static CGEN_INLINE long extract_1
70
  (CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, int, unsigned char *, bfd_vma);
71
#endif
72
 
73
/* Operand insertion.  */
74
 
75
#if ! CGEN_INT_INSN_P
76
 
77
/* Subroutine of insert_normal.  */
78
 
79
static CGEN_INLINE void
80
insert_1 (CGEN_CPU_DESC cd,
81
          unsigned long value,
82
          int start,
83
          int length,
84
          int word_length,
85
          unsigned char *bufp)
86
{
87
  unsigned long x,mask;
88
  int shift;
89
 
90
  x = cgen_get_insn_value (cd, bufp, word_length);
91
 
92
  /* Written this way to avoid undefined behaviour.  */
93
  mask = (((1L << (length - 1)) - 1) << 1) | 1;
94
  if (CGEN_INSN_LSB0_P)
95
    shift = (start + 1) - length;
96
  else
97
    shift = (word_length - (start + length));
98
  x = (x & ~(mask << shift)) | ((value & mask) << shift);
99
 
100
  cgen_put_insn_value (cd, bufp, word_length, (bfd_vma) x);
101
}
102
 
103
#endif /* ! CGEN_INT_INSN_P */
104
 
105
/* Default insertion routine.
106
 
107
   ATTRS is a mask of the boolean attributes.
108
   WORD_OFFSET is the offset in bits from the start of the insn of the value.
109
   WORD_LENGTH is the length of the word in bits in which the value resides.
110
   START is the starting bit number in the word, architecture origin.
111
   LENGTH is the length of VALUE in bits.
112
   TOTAL_LENGTH is the total length of the insn in bits.
113
 
114
   The result is an error message or NULL if success.  */
115
 
116
/* ??? This duplicates functionality with bfd's howto table and
117
   bfd_install_relocation.  */
118
/* ??? This doesn't handle bfd_vma's.  Create another function when
119
   necessary.  */
120
 
121
static const char *
122
insert_normal (CGEN_CPU_DESC cd,
123
               long value,
124
               unsigned int attrs,
125
               unsigned int word_offset,
126
               unsigned int start,
127
               unsigned int length,
128
               unsigned int word_length,
129
               unsigned int total_length,
130
               CGEN_INSN_BYTES_PTR buffer)
131
{
132
  static char errbuf[100];
133
  /* Written this way to avoid undefined behaviour.  */
134
  unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1;
135
 
136
  /* If LENGTH is zero, this operand doesn't contribute to the value.  */
137
  if (length == 0)
138
    return NULL;
139
 
140
  if (word_length > 32)
141
    abort ();
142
 
143
  /* For architectures with insns smaller than the base-insn-bitsize,
144
     word_length may be too big.  */
145
  if (cd->min_insn_bitsize < cd->base_insn_bitsize)
146
    {
147
      if (word_offset == 0
148
          && word_length > total_length)
149
        word_length = total_length;
150
    }
151
 
152
  /* Ensure VALUE will fit.  */
153
  if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGN_OPT))
154
    {
155
      long minval = - (1L << (length - 1));
156
      unsigned long maxval = mask;
157
 
158
      if ((value > 0 && (unsigned long) value > maxval)
159
          || value < minval)
160
        {
161
          /* xgettext:c-format */
162
          sprintf (errbuf,
163
                   _("operand out of range (%ld not between %ld and %lu)"),
164
                   value, minval, maxval);
165
          return errbuf;
166
        }
167
    }
168
  else if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED))
169
    {
170
      unsigned long maxval = mask;
171
      unsigned long val = (unsigned long) value;
172
 
173
      /* For hosts with a word size > 32 check to see if value has been sign
174
         extended beyond 32 bits.  If so then ignore these higher sign bits
175
         as the user is attempting to store a 32-bit signed value into an
176
         unsigned 32-bit field which is allowed.  */
177
      if (sizeof (unsigned long) > 4 && ((value >> 32) == -1))
178
        val &= 0xFFFFFFFF;
179
 
180
      if (val > maxval)
181
        {
182
          /* xgettext:c-format */
183
          sprintf (errbuf,
184
                   _("operand out of range (0x%lx not between 0 and 0x%lx)"),
185
                   val, maxval);
186
          return errbuf;
187
        }
188
    }
189
  else
190
    {
191
      if (! cgen_signed_overflow_ok_p (cd))
192
        {
193
          long minval = - (1L << (length - 1));
194
          long maxval =   (1L << (length - 1)) - 1;
195
 
196
          if (value < minval || value > maxval)
197
            {
198
              sprintf
199
                /* xgettext:c-format */
200
                (errbuf, _("operand out of range (%ld not between %ld and %ld)"),
201
                 value, minval, maxval);
202
              return errbuf;
203
            }
204
        }
205
    }
206
 
207
#if CGEN_INT_INSN_P
208
 
209
  {
210
    int shift;
211
 
212
    if (CGEN_INSN_LSB0_P)
213
      shift = (word_offset + start + 1) - length;
214
    else
215
      shift = total_length - (word_offset + start + length);
216
    *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
217
  }
218
 
219
#else /* ! CGEN_INT_INSN_P */
220
 
221
  {
222
    unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
223
 
224
    insert_1 (cd, value, start, length, word_length, bufp);
225
  }
226
 
227
#endif /* ! CGEN_INT_INSN_P */
228
 
229
  return NULL;
230
}
231
 
232
/* Default insn builder (insert handler).
233
   The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
234
   that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
235
   recorded in host byte order, otherwise BUFFER is an array of bytes
236
   and the value is recorded in target byte order).
237
   The result is an error message or NULL if success.  */
238
 
239
static const char *
240
insert_insn_normal (CGEN_CPU_DESC cd,
241
                    const CGEN_INSN * insn,
242
                    CGEN_FIELDS * fields,
243
                    CGEN_INSN_BYTES_PTR buffer,
244
                    bfd_vma pc)
245
{
246
  const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
247
  unsigned long value;
248
  const CGEN_SYNTAX_CHAR_TYPE * syn;
249
 
250
  CGEN_INIT_INSERT (cd);
251
  value = CGEN_INSN_BASE_VALUE (insn);
252
 
253
  /* If we're recording insns as numbers (rather than a string of bytes),
254
     target byte order handling is deferred until later.  */
255
 
256
#if CGEN_INT_INSN_P
257
 
258
  put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
259
                      CGEN_FIELDS_BITSIZE (fields), value);
260
 
261
#else
262
 
263
  cgen_put_insn_value (cd, buffer, min ((unsigned) cd->base_insn_bitsize,
264
                                        (unsigned) CGEN_FIELDS_BITSIZE (fields)),
265
                       value);
266
 
267
#endif /* ! CGEN_INT_INSN_P */
268
 
269
  /* ??? It would be better to scan the format's fields.
270
     Still need to be able to insert a value based on the operand though;
271
     e.g. storing a branch displacement that got resolved later.
272
     Needs more thought first.  */
273
 
274
  for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
275
    {
276
      const char *errmsg;
277
 
278
      if (CGEN_SYNTAX_CHAR_P (* syn))
279
        continue;
280
 
281
      errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
282
                                       fields, buffer, pc);
283
      if (errmsg)
284
        return errmsg;
285
    }
286
 
287
  return NULL;
288
}
289
 
290
#if CGEN_INT_INSN_P
291
/* Cover function to store an insn value into an integral insn.  Must go here
292
   because it needs <prefix>-desc.h for CGEN_INT_INSN_P.  */
293
 
294
static void
295
put_insn_int_value (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
296
                    CGEN_INSN_BYTES_PTR buf,
297
                    int length,
298
                    int insn_length,
299
                    CGEN_INSN_INT value)
300
{
301
  /* For architectures with insns smaller than the base-insn-bitsize,
302
     length may be too big.  */
303
  if (length > insn_length)
304
    *buf = value;
305
  else
306
    {
307
      int shift = insn_length - length;
308
      /* Written this way to avoid undefined behaviour.  */
309
      CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1;
310
 
311
      *buf = (*buf & ~(mask << shift)) | ((value & mask) << shift);
312
    }
313
}
314
#endif
315
 
316
/* Operand extraction.  */
317
 
318
#if ! CGEN_INT_INSN_P
319
 
320
/* Subroutine of extract_normal.
321
   Ensure sufficient bytes are cached in EX_INFO.
322
   OFFSET is the offset in bytes from the start of the insn of the value.
323
   BYTES is the length of the needed value.
324
   Returns 1 for success, 0 for failure.  */
325
 
326
static CGEN_INLINE int
327
fill_cache (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
328
            CGEN_EXTRACT_INFO *ex_info,
329
            int offset,
330
            int bytes,
331
            bfd_vma pc)
332
{
333
  /* It's doubtful that the middle part has already been fetched so
334
     we don't optimize that case.  kiss.  */
335
  unsigned int mask;
336
  disassemble_info *info = (disassemble_info *) ex_info->dis_info;
337
 
338
  /* First do a quick check.  */
339
  mask = (1 << bytes) - 1;
340
  if (((ex_info->valid >> offset) & mask) == mask)
341
    return 1;
342
 
343
  /* Search for the first byte we need to read.  */
344
  for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1)
345
    if (! (mask & ex_info->valid))
346
      break;
347
 
348
  if (bytes)
349
    {
350
      int status;
351
 
352
      pc += offset;
353
      status = (*info->read_memory_func)
354
        (pc, ex_info->insn_bytes + offset, bytes, info);
355
 
356
      if (status != 0)
357
        {
358
          (*info->memory_error_func) (status, pc, info);
359
          return 0;
360
        }
361
 
362
      ex_info->valid |= ((1 << bytes) - 1) << offset;
363
    }
364
 
365
  return 1;
366
}
367
 
368
/* Subroutine of extract_normal.  */
369
 
370
static CGEN_INLINE long
371
extract_1 (CGEN_CPU_DESC cd,
372
           CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
373
           int start,
374
           int length,
375
           int word_length,
376
           unsigned char *bufp,
377
           bfd_vma pc ATTRIBUTE_UNUSED)
378
{
379
  unsigned long x;
380
  int shift;
381
 
382
  x = cgen_get_insn_value (cd, bufp, word_length);
383
 
384
  if (CGEN_INSN_LSB0_P)
385
    shift = (start + 1) - length;
386
  else
387
    shift = (word_length - (start + length));
388
  return x >> shift;
389
}
390
 
391
#endif /* ! CGEN_INT_INSN_P */
392
 
393
/* Default extraction routine.
394
 
395
   INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
396
   or sometimes less for cases like the m32r where the base insn size is 32
397
   but some insns are 16 bits.
398
   ATTRS is a mask of the boolean attributes.  We only need `SIGNED',
399
   but for generality we take a bitmask of all of them.
400
   WORD_OFFSET is the offset in bits from the start of the insn of the value.
401
   WORD_LENGTH is the length of the word in bits in which the value resides.
402
   START is the starting bit number in the word, architecture origin.
403
   LENGTH is the length of VALUE in bits.
404
   TOTAL_LENGTH is the total length of the insn in bits.
405
 
406
   Returns 1 for success, 0 for failure.  */
407
 
408
/* ??? The return code isn't properly used.  wip.  */
409
 
410
/* ??? This doesn't handle bfd_vma's.  Create another function when
411
   necessary.  */
412
 
413
static int
414
extract_normal (CGEN_CPU_DESC cd,
415
#if ! CGEN_INT_INSN_P
416
                CGEN_EXTRACT_INFO *ex_info,
417
#else
418
                CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
419
#endif
420
                CGEN_INSN_INT insn_value,
421
                unsigned int attrs,
422
                unsigned int word_offset,
423
                unsigned int start,
424
                unsigned int length,
425
                unsigned int word_length,
426
                unsigned int total_length,
427
#if ! CGEN_INT_INSN_P
428
                bfd_vma pc,
429
#else
430
                bfd_vma pc ATTRIBUTE_UNUSED,
431
#endif
432
                long *valuep)
433
{
434
  long value, mask;
435
 
436
  /* If LENGTH is zero, this operand doesn't contribute to the value
437
     so give it a standard value of zero.  */
438
  if (length == 0)
439
    {
440
      *valuep = 0;
441
      return 1;
442
    }
443
 
444
  if (word_length > 32)
445
    abort ();
446
 
447
  /* For architectures with insns smaller than the insn-base-bitsize,
448
     word_length may be too big.  */
449
  if (cd->min_insn_bitsize < cd->base_insn_bitsize)
450
    {
451
      if (word_offset + word_length > total_length)
452
        word_length = total_length - word_offset;
453
    }
454
 
455
  /* Does the value reside in INSN_VALUE, and at the right alignment?  */
456
 
457
  if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length))
458
    {
459
      if (CGEN_INSN_LSB0_P)
460
        value = insn_value >> ((word_offset + start + 1) - length);
461
      else
462
        value = insn_value >> (total_length - ( word_offset + start + length));
463
    }
464
 
465
#if ! CGEN_INT_INSN_P
466
 
467
  else
468
    {
469
      unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
470
 
471
      if (word_length > 32)
472
        abort ();
473
 
474
      if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
475
        return 0;
476
 
477
      value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
478
    }
479
 
480
#endif /* ! CGEN_INT_INSN_P */
481
 
482
  /* Written this way to avoid undefined behaviour.  */
483
  mask = (((1L << (length - 1)) - 1) << 1) | 1;
484
 
485
  value &= mask;
486
  /* sign extend? */
487
  if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
488
      && (value & (1L << (length - 1))))
489
    value |= ~mask;
490
 
491
  *valuep = value;
492
 
493
  return 1;
494
}
495
 
496
/* Default insn extractor.
497
 
498
   INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
499
   The extracted fields are stored in FIELDS.
500
   EX_INFO is used to handle reading variable length insns.
501
   Return the length of the insn in bits, or 0 if no match,
502
   or -1 if an error occurs fetching data (memory_error_func will have
503
   been called).  */
504
 
505
static int
506
extract_insn_normal (CGEN_CPU_DESC cd,
507
                     const CGEN_INSN *insn,
508
                     CGEN_EXTRACT_INFO *ex_info,
509
                     CGEN_INSN_INT insn_value,
510
                     CGEN_FIELDS *fields,
511
                     bfd_vma pc)
512
{
513
  const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
514
  const CGEN_SYNTAX_CHAR_TYPE *syn;
515
 
516
  CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
517
 
518
  CGEN_INIT_EXTRACT (cd);
519
 
520
  for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
521
    {
522
      int length;
523
 
524
      if (CGEN_SYNTAX_CHAR_P (*syn))
525
        continue;
526
 
527
      length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
528
                                        ex_info, insn_value, fields, pc);
529
      if (length <= 0)
530
        return length;
531
    }
532
 
533
  /* We recognized and successfully extracted this insn.  */
534
  return CGEN_INSN_BITSIZE (insn);
535
}
536
 
537
/* Machine generated code added here.  */
538
 
539
const char * openrisc_cgen_insert_operand
540
  (CGEN_CPU_DESC, int, CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
541
 
542
/* Main entry point for operand insertion.
543
 
544
   This function is basically just a big switch statement.  Earlier versions
545
   used tables to look up the function to use, but
546
   - if the table contains both assembler and disassembler functions then
547
     the disassembler contains much of the assembler and vice-versa,
548
   - there's a lot of inlining possibilities as things grow,
549
   - using a switch statement avoids the function call overhead.
550
 
551
   This function could be moved into `parse_insn_normal', but keeping it
552
   separate makes clear the interface between `parse_insn_normal' and each of
553
   the handlers.  It's also needed by GAS to insert operands that couldn't be
554
   resolved during parsing.  */
555
 
556
const char *
557
openrisc_cgen_insert_operand (CGEN_CPU_DESC cd,
558
                             int opindex,
559
                             CGEN_FIELDS * fields,
560
                             CGEN_INSN_BYTES_PTR buffer,
561
                             bfd_vma pc ATTRIBUTE_UNUSED)
562
{
563
  const char * errmsg = NULL;
564
  unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
565
 
566
  switch (opindex)
567
    {
568
    case OPENRISC_OPERAND_ABS_26 :
569
      {
570
        long value = fields->f_abs26;
571
        value = ((unsigned int) (pc) >> (2));
572
        errmsg = insert_normal (cd, value, 0|(1<<CGEN_IFLD_SIGNED)|(1<<CGEN_IFLD_ABS_ADDR), 0, 25, 26, 32, total_length, buffer);
573
      }
574
      break;
575
    case OPENRISC_OPERAND_DISP_26 :
576
      {
577
        long value = fields->f_disp26;
578
        value = ((int) (((value) - (pc))) >> (2));
579
        errmsg = insert_normal (cd, value, 0|(1<<CGEN_IFLD_SIGNED)|(1<<CGEN_IFLD_PCREL_ADDR), 0, 25, 26, 32, total_length, buffer);
580
      }
581
      break;
582
    case OPENRISC_OPERAND_HI16 :
583
      errmsg = insert_normal (cd, fields->f_simm16, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
584
      break;
585
    case OPENRISC_OPERAND_LO16 :
586
      errmsg = insert_normal (cd, fields->f_lo16, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
587
      break;
588
    case OPENRISC_OPERAND_OP_F_23 :
589
      errmsg = insert_normal (cd, fields->f_op4, 0, 0, 23, 3, 32, total_length, buffer);
590
      break;
591
    case OPENRISC_OPERAND_OP_F_3 :
592
      errmsg = insert_normal (cd, fields->f_op5, 0, 0, 25, 5, 32, total_length, buffer);
593
      break;
594
    case OPENRISC_OPERAND_RA :
595
      errmsg = insert_normal (cd, fields->f_r2, 0, 0, 20, 5, 32, total_length, buffer);
596
      break;
597
    case OPENRISC_OPERAND_RB :
598
      errmsg = insert_normal (cd, fields->f_r3, 0, 0, 15, 5, 32, total_length, buffer);
599
      break;
600
    case OPENRISC_OPERAND_RD :
601
      errmsg = insert_normal (cd, fields->f_r1, 0, 0, 25, 5, 32, total_length, buffer);
602
      break;
603
    case OPENRISC_OPERAND_SIMM_16 :
604
      errmsg = insert_normal (cd, fields->f_simm16, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, buffer);
605
      break;
606
    case OPENRISC_OPERAND_UI16NC :
607
      {
608
{
609
  FLD (f_i16_2) = ((((unsigned int) (FLD (f_i16nc)) >> (11))) & (31));
610
  FLD (f_i16_1) = ((FLD (f_i16nc)) & (2047));
611
}
612
        errmsg = insert_normal (cd, fields->f_i16_1, 0, 0, 10, 11, 32, total_length, buffer);
613
        if (errmsg)
614
          break;
615
        errmsg = insert_normal (cd, fields->f_i16_2, 0, 0, 25, 5, 32, total_length, buffer);
616
        if (errmsg)
617
          break;
618
      }
619
      break;
620
    case OPENRISC_OPERAND_UIMM_16 :
621
      errmsg = insert_normal (cd, fields->f_uimm16, 0, 0, 15, 16, 32, total_length, buffer);
622
      break;
623
    case OPENRISC_OPERAND_UIMM_5 :
624
      errmsg = insert_normal (cd, fields->f_uimm5, 0, 0, 4, 5, 32, total_length, buffer);
625
      break;
626
 
627
    default :
628
      /* xgettext:c-format */
629
      fprintf (stderr, _("Unrecognized field %d while building insn.\n"),
630
               opindex);
631
      abort ();
632
  }
633
 
634
  return errmsg;
635
}
636
 
637
int openrisc_cgen_extract_operand
638
  (CGEN_CPU_DESC, int, CGEN_EXTRACT_INFO *, CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
639
 
640
/* Main entry point for operand extraction.
641
   The result is <= 0 for error, >0 for success.
642
   ??? Actual values aren't well defined right now.
643
 
644
   This function is basically just a big switch statement.  Earlier versions
645
   used tables to look up the function to use, but
646
   - if the table contains both assembler and disassembler functions then
647
     the disassembler contains much of the assembler and vice-versa,
648
   - there's a lot of inlining possibilities as things grow,
649
   - using a switch statement avoids the function call overhead.
650
 
651
   This function could be moved into `print_insn_normal', but keeping it
652
   separate makes clear the interface between `print_insn_normal' and each of
653
   the handlers.  */
654
 
655
int
656
openrisc_cgen_extract_operand (CGEN_CPU_DESC cd,
657
                             int opindex,
658
                             CGEN_EXTRACT_INFO *ex_info,
659
                             CGEN_INSN_INT insn_value,
660
                             CGEN_FIELDS * fields,
661
                             bfd_vma pc)
662
{
663
  /* Assume success (for those operands that are nops).  */
664
  int length = 1;
665
  unsigned int total_length = CGEN_FIELDS_BITSIZE (fields);
666
 
667
  switch (opindex)
668
    {
669
    case OPENRISC_OPERAND_ABS_26 :
670
      {
671
        long value;
672
        length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED)|(1<<CGEN_IFLD_ABS_ADDR), 0, 25, 26, 32, total_length, pc, & value);
673
        value = ((value) << (2));
674
        fields->f_abs26 = value;
675
      }
676
      break;
677
    case OPENRISC_OPERAND_DISP_26 :
678
      {
679
        long value;
680
        length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED)|(1<<CGEN_IFLD_PCREL_ADDR), 0, 25, 26, 32, total_length, pc, & value);
681
        value = ((((value) << (2))) + (pc));
682
        fields->f_disp26 = value;
683
      }
684
      break;
685
    case OPENRISC_OPERAND_HI16 :
686
      length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_simm16);
687
      break;
688
    case OPENRISC_OPERAND_LO16 :
689
      length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_lo16);
690
      break;
691
    case OPENRISC_OPERAND_OP_F_23 :
692
      length = extract_normal (cd, ex_info, insn_value, 0, 0, 23, 3, 32, total_length, pc, & fields->f_op4);
693
      break;
694
    case OPENRISC_OPERAND_OP_F_3 :
695
      length = extract_normal (cd, ex_info, insn_value, 0, 0, 25, 5, 32, total_length, pc, & fields->f_op5);
696
      break;
697
    case OPENRISC_OPERAND_RA :
698
      length = extract_normal (cd, ex_info, insn_value, 0, 0, 20, 5, 32, total_length, pc, & fields->f_r2);
699
      break;
700
    case OPENRISC_OPERAND_RB :
701
      length = extract_normal (cd, ex_info, insn_value, 0, 0, 15, 5, 32, total_length, pc, & fields->f_r3);
702
      break;
703
    case OPENRISC_OPERAND_RD :
704
      length = extract_normal (cd, ex_info, insn_value, 0, 0, 25, 5, 32, total_length, pc, & fields->f_r1);
705
      break;
706
    case OPENRISC_OPERAND_SIMM_16 :
707
      length = extract_normal (cd, ex_info, insn_value, 0|(1<<CGEN_IFLD_SIGNED), 0, 15, 16, 32, total_length, pc, & fields->f_simm16);
708
      break;
709
    case OPENRISC_OPERAND_UI16NC :
710
      {
711
        length = extract_normal (cd, ex_info, insn_value, 0, 0, 10, 11, 32, total_length, pc, & fields->f_i16_1);
712
        if (length <= 0) break;
713
        length = extract_normal (cd, ex_info, insn_value, 0, 0, 25, 5, 32, total_length, pc, & fields->f_i16_2);
714
        if (length <= 0) break;
715
{
716
  FLD (f_i16nc) = openrisc_sign_extend_16bit (((((FLD (f_i16_2)) << (11))) | (FLD (f_i16_1))));
717
}
718
      }
719
      break;
720
    case OPENRISC_OPERAND_UIMM_16 :
721
      length = extract_normal (cd, ex_info, insn_value, 0, 0, 15, 16, 32, total_length, pc, & fields->f_uimm16);
722
      break;
723
    case OPENRISC_OPERAND_UIMM_5 :
724
      length = extract_normal (cd, ex_info, insn_value, 0, 0, 4, 5, 32, total_length, pc, & fields->f_uimm5);
725
      break;
726
 
727
    default :
728
      /* xgettext:c-format */
729
      fprintf (stderr, _("Unrecognized field %d while decoding insn.\n"),
730
               opindex);
731
      abort ();
732
    }
733
 
734
  return length;
735
}
736
 
737
cgen_insert_fn * const openrisc_cgen_insert_handlers[] =
738
{
739
  insert_insn_normal,
740
};
741
 
742
cgen_extract_fn * const openrisc_cgen_extract_handlers[] =
743
{
744
  extract_insn_normal,
745
};
746
 
747
int openrisc_cgen_get_int_operand     (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
748
bfd_vma openrisc_cgen_get_vma_operand (CGEN_CPU_DESC, int, const CGEN_FIELDS *);
749
 
750
/* Getting values from cgen_fields is handled by a collection of functions.
751
   They are distinguished by the type of the VALUE argument they return.
752
   TODO: floating point, inlining support, remove cases where result type
753
   not appropriate.  */
754
 
755
int
756
openrisc_cgen_get_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
757
                             int opindex,
758
                             const CGEN_FIELDS * fields)
759
{
760
  int value;
761
 
762
  switch (opindex)
763
    {
764
    case OPENRISC_OPERAND_ABS_26 :
765
      value = fields->f_abs26;
766
      break;
767
    case OPENRISC_OPERAND_DISP_26 :
768
      value = fields->f_disp26;
769
      break;
770
    case OPENRISC_OPERAND_HI16 :
771
      value = fields->f_simm16;
772
      break;
773
    case OPENRISC_OPERAND_LO16 :
774
      value = fields->f_lo16;
775
      break;
776
    case OPENRISC_OPERAND_OP_F_23 :
777
      value = fields->f_op4;
778
      break;
779
    case OPENRISC_OPERAND_OP_F_3 :
780
      value = fields->f_op5;
781
      break;
782
    case OPENRISC_OPERAND_RA :
783
      value = fields->f_r2;
784
      break;
785
    case OPENRISC_OPERAND_RB :
786
      value = fields->f_r3;
787
      break;
788
    case OPENRISC_OPERAND_RD :
789
      value = fields->f_r1;
790
      break;
791
    case OPENRISC_OPERAND_SIMM_16 :
792
      value = fields->f_simm16;
793
      break;
794
    case OPENRISC_OPERAND_UI16NC :
795
      value = fields->f_i16nc;
796
      break;
797
    case OPENRISC_OPERAND_UIMM_16 :
798
      value = fields->f_uimm16;
799
      break;
800
    case OPENRISC_OPERAND_UIMM_5 :
801
      value = fields->f_uimm5;
802
      break;
803
 
804
    default :
805
      /* xgettext:c-format */
806
      fprintf (stderr, _("Unrecognized field %d while getting int operand.\n"),
807
                       opindex);
808
      abort ();
809
  }
810
 
811
  return value;
812
}
813
 
814
bfd_vma
815
openrisc_cgen_get_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
816
                             int opindex,
817
                             const CGEN_FIELDS * fields)
818
{
819
  bfd_vma value;
820
 
821
  switch (opindex)
822
    {
823
    case OPENRISC_OPERAND_ABS_26 :
824
      value = fields->f_abs26;
825
      break;
826
    case OPENRISC_OPERAND_DISP_26 :
827
      value = fields->f_disp26;
828
      break;
829
    case OPENRISC_OPERAND_HI16 :
830
      value = fields->f_simm16;
831
      break;
832
    case OPENRISC_OPERAND_LO16 :
833
      value = fields->f_lo16;
834
      break;
835
    case OPENRISC_OPERAND_OP_F_23 :
836
      value = fields->f_op4;
837
      break;
838
    case OPENRISC_OPERAND_OP_F_3 :
839
      value = fields->f_op5;
840
      break;
841
    case OPENRISC_OPERAND_RA :
842
      value = fields->f_r2;
843
      break;
844
    case OPENRISC_OPERAND_RB :
845
      value = fields->f_r3;
846
      break;
847
    case OPENRISC_OPERAND_RD :
848
      value = fields->f_r1;
849
      break;
850
    case OPENRISC_OPERAND_SIMM_16 :
851
      value = fields->f_simm16;
852
      break;
853
    case OPENRISC_OPERAND_UI16NC :
854
      value = fields->f_i16nc;
855
      break;
856
    case OPENRISC_OPERAND_UIMM_16 :
857
      value = fields->f_uimm16;
858
      break;
859
    case OPENRISC_OPERAND_UIMM_5 :
860
      value = fields->f_uimm5;
861
      break;
862
 
863
    default :
864
      /* xgettext:c-format */
865
      fprintf (stderr, _("Unrecognized field %d while getting vma operand.\n"),
866
                       opindex);
867
      abort ();
868
  }
869
 
870
  return value;
871
}
872
 
873
void openrisc_cgen_set_int_operand  (CGEN_CPU_DESC, int, CGEN_FIELDS *, int);
874
void openrisc_cgen_set_vma_operand  (CGEN_CPU_DESC, int, CGEN_FIELDS *, bfd_vma);
875
 
876
/* Stuffing values in cgen_fields is handled by a collection of functions.
877
   They are distinguished by the type of the VALUE argument they accept.
878
   TODO: floating point, inlining support, remove cases where argument type
879
   not appropriate.  */
880
 
881
void
882
openrisc_cgen_set_int_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
883
                             int opindex,
884
                             CGEN_FIELDS * fields,
885
                             int value)
886
{
887
  switch (opindex)
888
    {
889
    case OPENRISC_OPERAND_ABS_26 :
890
      fields->f_abs26 = value;
891
      break;
892
    case OPENRISC_OPERAND_DISP_26 :
893
      fields->f_disp26 = value;
894
      break;
895
    case OPENRISC_OPERAND_HI16 :
896
      fields->f_simm16 = value;
897
      break;
898
    case OPENRISC_OPERAND_LO16 :
899
      fields->f_lo16 = value;
900
      break;
901
    case OPENRISC_OPERAND_OP_F_23 :
902
      fields->f_op4 = value;
903
      break;
904
    case OPENRISC_OPERAND_OP_F_3 :
905
      fields->f_op5 = value;
906
      break;
907
    case OPENRISC_OPERAND_RA :
908
      fields->f_r2 = value;
909
      break;
910
    case OPENRISC_OPERAND_RB :
911
      fields->f_r3 = value;
912
      break;
913
    case OPENRISC_OPERAND_RD :
914
      fields->f_r1 = value;
915
      break;
916
    case OPENRISC_OPERAND_SIMM_16 :
917
      fields->f_simm16 = value;
918
      break;
919
    case OPENRISC_OPERAND_UI16NC :
920
      fields->f_i16nc = value;
921
      break;
922
    case OPENRISC_OPERAND_UIMM_16 :
923
      fields->f_uimm16 = value;
924
      break;
925
    case OPENRISC_OPERAND_UIMM_5 :
926
      fields->f_uimm5 = value;
927
      break;
928
 
929
    default :
930
      /* xgettext:c-format */
931
      fprintf (stderr, _("Unrecognized field %d while setting int operand.\n"),
932
                       opindex);
933
      abort ();
934
  }
935
}
936
 
937
void
938
openrisc_cgen_set_vma_operand (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
939
                             int opindex,
940
                             CGEN_FIELDS * fields,
941
                             bfd_vma value)
942
{
943
  switch (opindex)
944
    {
945
    case OPENRISC_OPERAND_ABS_26 :
946
      fields->f_abs26 = value;
947
      break;
948
    case OPENRISC_OPERAND_DISP_26 :
949
      fields->f_disp26 = value;
950
      break;
951
    case OPENRISC_OPERAND_HI16 :
952
      fields->f_simm16 = value;
953
      break;
954
    case OPENRISC_OPERAND_LO16 :
955
      fields->f_lo16 = value;
956
      break;
957
    case OPENRISC_OPERAND_OP_F_23 :
958
      fields->f_op4 = value;
959
      break;
960
    case OPENRISC_OPERAND_OP_F_3 :
961
      fields->f_op5 = value;
962
      break;
963
    case OPENRISC_OPERAND_RA :
964
      fields->f_r2 = value;
965
      break;
966
    case OPENRISC_OPERAND_RB :
967
      fields->f_r3 = value;
968
      break;
969
    case OPENRISC_OPERAND_RD :
970
      fields->f_r1 = value;
971
      break;
972
    case OPENRISC_OPERAND_SIMM_16 :
973
      fields->f_simm16 = value;
974
      break;
975
    case OPENRISC_OPERAND_UI16NC :
976
      fields->f_i16nc = value;
977
      break;
978
    case OPENRISC_OPERAND_UIMM_16 :
979
      fields->f_uimm16 = value;
980
      break;
981
    case OPENRISC_OPERAND_UIMM_5 :
982
      fields->f_uimm5 = value;
983
      break;
984
 
985
    default :
986
      /* xgettext:c-format */
987
      fprintf (stderr, _("Unrecognized field %d while setting vma operand.\n"),
988
                       opindex);
989
      abort ();
990
  }
991
}
992
 
993
/* Function to call before using the instruction builder tables.  */
994
 
995
void
996
openrisc_cgen_init_ibld_table (CGEN_CPU_DESC cd)
997
{
998
  cd->insert_handlers = & openrisc_cgen_insert_handlers[0];
999
  cd->extract_handlers = & openrisc_cgen_extract_handlers[0];
1000
 
1001
  cd->insert_operand = openrisc_cgen_insert_operand;
1002
  cd->extract_operand = openrisc_cgen_extract_operand;
1003
 
1004
  cd->get_int_operand = openrisc_cgen_get_int_operand;
1005
  cd->set_int_operand = openrisc_cgen_set_int_operand;
1006
  cd->get_vma_operand = openrisc_cgen_get_vma_operand;
1007
  cd->set_vma_operand = openrisc_cgen_set_vma_operand;
1008
}

powered by: WebSVN 2.1.0

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