aboutsummaryrefslogtreecommitdiff
path: root/cpu/ms1.opc
blob: e3b32db7b94b5beb5064831ae9a1c5ee12d63878 (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
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
/* Morpho Technologies mRISC opcode support, for GNU Binutils.  -*- C -*-
   Copyright 2001 Free Software Foundation, Inc.

   Contributed by Red Hat Inc; developed under contract from
   Morpho Technologies.

   This file is part of the GNU Binutils.

   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 of the License, 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.

*/

/*
   Each section is delimited with start and end markers.

   <arch>-opc.h additions use: "-- opc.h"
   <arch>-opc.c additions use: "-- opc.c"
   <arch>-asm.c additions use: "-- asm.c"
   <arch>-dis.c additions use: "-- dis.c"
   <arch>-ibd.h additions use: "-- ibd.h"
*/

/* -- opc.h */

/* Check applicability of instructions against machines.  */
#define CGEN_VALIDATE_INSN_SUPPORTED

/* Allows reason codes to be output when assembler errors occur.  */
#define CGEN_VERBOSE_ASSEMBLER_ERRORS

/* Override disassembly hashing - there are variable bits in the top
   byte of these instructions.  */
#define CGEN_DIS_HASH_SIZE 8
#define CGEN_DIS_HASH(buf, value) (((* (unsigned char *) (buf)) >> 5) % CGEN_DIS_HASH_SIZE)

#define CGEN_ASM_HASH_SIZE 127
#define CGEN_ASM_HASH(insn) ms1_asm_hash (insn)

extern unsigned int ms1_asm_hash (const char *);

extern int ms1_cgen_insn_supported (CGEN_CPU_DESC, const CGEN_INSN *);


/* -- opc.c */
#include "safe-ctype.h"

/* Special check to ensure that instruction exists for given machine.  */

int
ms1_cgen_insn_supported (CGEN_CPU_DESC cd,
			 const CGEN_INSN *insn)
{
  int machs = CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_MACH);

  /* No mach attribute?  Assume it's supported for all machs.  */
  if (machs == 0)
    return 1;
  
  return ((machs & cd->machs) != 0);
}

/* A better hash function for instruction mnemonics.  */

unsigned int
ms1_asm_hash (const char* insn)
{
  unsigned int hash;
  const char* m = insn;

  for (hash = 0; *m && ! ISSPACE (*m); m++)
    hash = (hash * 23) ^ (0x1F & TOLOWER (*m));

  /* printf ("%s %d\n", insn, (hash % CGEN_ASM_HASH_SIZE)); */

  return hash % CGEN_ASM_HASH_SIZE;
}


/* -- asm.c */
/* Range checking for signed numbers.  Returns 0 if acceptable
   and 1 if the value is out of bounds for a signed quantity.  */

static int 
signed_out_of_bounds (long val)
{
  if ((val < -32768) || (val > 32767))
    return 1;
  return 0;
}

static const char *
parse_loopsize (CGEN_CPU_DESC cd,
		const char **strp,
		int opindex,
		void *arg)
{
  signed long * valuep = (signed long *) arg;
  const char *errmsg;
  bfd_reloc_code_real_type code = BFD_RELOC_NONE;
  enum cgen_parse_operand_result result_type;
  bfd_vma value;

  /* Is it a control transfer instructions?  */ 
  if (opindex == (CGEN_OPERAND_TYPE) MS1_OPERAND_LOOPSIZE)
    {
      code = BFD_RELOC_MS1_PCINSN8;
      errmsg = cgen_parse_address (cd, strp, opindex, code,
                                   & result_type, & value);
      *valuep = value;
      return errmsg;
    }

  abort ();
}

static const char *
parse_imm16 (CGEN_CPU_DESC cd,
	     const char **strp,
	     int opindex,
	     void *arg)
{
  signed long * valuep = (signed long *) arg;
  const char *errmsg;
  enum cgen_parse_operand_result result_type;
  bfd_reloc_code_real_type code = BFD_RELOC_NONE;
  bfd_vma value;

  /* Is it a control transfer instructions?  */ 
  if (opindex == (CGEN_OPERAND_TYPE) MS1_OPERAND_IMM16O)
    {
      code = BFD_RELOC_16_PCREL;
      errmsg = cgen_parse_address (cd, strp, opindex, code,
                                   & result_type, & value);
      if (errmsg == NULL)
	{
	  if (signed_out_of_bounds (value))
	    errmsg = _("Operand out of range. Must be between -32768 and 32767.");
	}
      *valuep = value;
      return errmsg;
    }

  /* If it's not a control transfer instruction, then
     we have to check for %OP relocating operators.  */
  if (opindex == (CGEN_OPERAND_TYPE) MS1_OPERAND_IMM16L)
    ;
  else if (strncmp (*strp, "%hi16", 5) == 0)
    {
      *strp += 5;
      code = BFD_RELOC_HI16;
    }
  else if (strncmp (*strp, "%lo16", 5) == 0)
    {
      *strp += 5;
      code = BFD_RELOC_LO16;
    }

  /* If we found a %OP relocating operator, then parse it as an address.
     If not, we need to parse it as an integer, either signed or unsigned
     depending on which operand type we have.  */
  if (code != BFD_RELOC_NONE)
    {
       /* %OP relocating operator found.  */
       errmsg = cgen_parse_address (cd, strp, opindex, code,
                                   & result_type, & value);
       if (errmsg == NULL)
	 {
           switch (result_type)
	     {
	     case (CGEN_PARSE_OPERAND_RESULT_NUMBER):
	       if (code == BFD_RELOC_HI16)
		 value = (value >> 16) & 0xFFFF;
	       else if (code == BFD_RELOC_LO16)
		 value = value  & 0xFFFF;
	       else 
		 errmsg = _("Biiiig Trouble in parse_imm16!");
	       break;

	     case (CGEN_PARSE_OPERAND_RESULT_QUEUED):
	       /* No special processing for this case.  */
	       break;

	     default:
	       errmsg = _("%operator operand is not a symbol");
	       break;
             }
	 }
       *valuep = value;
    }
  else
    {
      /* Parse hex values like 0xffff as unsigned, and sign extend
	 them manually.  */
      int parse_signed = (opindex == (CGEN_OPERAND_TYPE)MS1_OPERAND_IMM16);

      if ((*strp)[0] == '0'
	  && ((*strp)[1] == 'x' || (*strp)[1] == 'X'))
	parse_signed = 0;

      /* No relocating operator.  Parse as an number.  */
      if (parse_signed)
	{
          /* Parse as as signed integer.  */
 
          errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);

          if (errmsg == NULL) 
	    {
#if 0
	      /* Manual range checking is needed for the signed case.  */
	      if (*valuep & 0x8000)
                value = 0xffff0000 | *valuep;
	      else 
                value = *valuep;

	      if (signed_out_of_bounds (value))
	        errmsg = _("Operand out of range. Must be between -32768 and 32767.");
	      /* Truncate to 16 bits. This is necessary
		 because cgen will have sign extended *valuep.  */
	      *valuep &= 0xFFFF; 
#endif
	    }
	}
      else  
	{
          /* MS1_OPERAND_IMM16Z.  Parse as an unsigned integer.  */
          errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, (unsigned long *) valuep);

	  if (opindex == (CGEN_OPERAND_TYPE) MS1_OPERAND_IMM16
	      && *valuep >= 0x8000
	      && *valuep <= 0xffff)
	    *valuep -= 0x10000;
	}
    }

  return errmsg;
}


static const char *
parse_dup (CGEN_CPU_DESC cd,
	   const char **strp,
	   int opindex,
	   unsigned long *valuep)
{
  const char *errmsg = NULL;

  if (strncmp (*strp, "dup", 3) == 0 || strncmp (*strp, "DUP", 3) == 0)
    {
      *strp += 3;
      *valuep = 1;
    }
  else if (strncmp (*strp, "xx", 2) == 0 || strncmp (*strp, "XX", 2) == 0)
    {
      *strp += 2;
      *valuep = 0;
    }
  else
    errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);

  return errmsg;
}


static const char *
parse_ball (CGEN_CPU_DESC cd,
	    const char **strp,
	    int opindex,
	    unsigned long *valuep)
{
  const char *errmsg = NULL;

  if (strncmp (*strp, "all", 3) == 0 || strncmp (*strp, "ALL", 3) == 0)
    {
      *strp += 3;
      *valuep = 1;
    }
  else if (strncmp (*strp, "one", 3) == 0 || strncmp (*strp, "ONE", 3) == 0)
    {
      *strp += 3;
      *valuep = 0;
    }
  else
    errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);

  return errmsg;
}

static const char *
parse_xmode (CGEN_CPU_DESC cd,
	     const char **strp,
	     int opindex,
	     unsigned long *valuep)
{
  const char *errmsg = NULL;

  if (strncmp (*strp, "pm", 2) == 0 || strncmp (*strp, "PM", 2) == 0)
    {
      *strp += 2;
      *valuep = 1;
    }
  else if (strncmp (*strp, "xm", 2) == 0 || strncmp (*strp, "XM", 2) == 0)
    {
      *strp += 2;
      *valuep = 0;
    }
  else
    errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);

  return errmsg;
}

static const char *
parse_rc (CGEN_CPU_DESC cd,
	  const char **strp,
	  int opindex,
	  unsigned long *valuep)
{
  const char *errmsg = NULL;

  if (strncmp (*strp, "r", 1) == 0 || strncmp (*strp, "R", 1) == 0)
    {
      *strp += 1;
      *valuep = 1;
    }
  else if (strncmp (*strp, "c", 1) == 0 || strncmp (*strp, "C", 1) == 0)
    {
      *strp += 1;
      *valuep = 0;
    }
  else
    errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);

  return errmsg;
}

static const char *
parse_cbrb (CGEN_CPU_DESC cd,
	    const char **strp,
	    int opindex,
	    unsigned long *valuep)
{
  const char *errmsg = NULL;

  if (strncmp (*strp, "rb", 2) == 0 || strncmp (*strp, "RB", 2) == 0)
    {
      *strp += 2;
      *valuep = 1;
    }
  else if (strncmp (*strp, "cb", 2) == 0 || strncmp (*strp, "CB", 2) == 0)
    {
      *strp += 2;
      *valuep = 0;
    }
  else
    errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);

  return errmsg;
}

static const char *
parse_rbbc (CGEN_CPU_DESC cd,
	    const char **strp,
	    int opindex,
	    unsigned long *valuep)
{
  const char *errmsg = NULL;

  if (strncmp (*strp, "rt", 2) == 0 || strncmp (*strp, "RT", 2) == 0)
    {
      *strp += 2;
      *valuep = 0;
    }
  else if (strncmp (*strp, "br1", 3) == 0 || strncmp (*strp, "BR1", 3) == 0)
    {
      *strp += 3;
      *valuep = 1;
    }
  else if (strncmp (*strp, "br2", 3) == 0 || strncmp (*strp, "BR2", 3) == 0)
    {
      *strp += 3;
      *valuep = 2;
    }
  else if (strncmp (*strp, "cs", 2) == 0 || strncmp (*strp, "CS", 2) == 0)
    {
      *strp += 2;
      *valuep = 3;
    }
  else
    errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);

  return errmsg;
}

static const char *
parse_type (CGEN_CPU_DESC cd,
	    const char **strp,
	    int opindex,
	    unsigned long *valuep)
{
  const char *errmsg = NULL;

  if (strncmp (*strp, "odd", 3) == 0 || strncmp (*strp, "ODD", 3) == 0)
    {
      *strp += 3;
      *valuep = 0;
    }
  else if (strncmp (*strp, "even", 4) == 0 || strncmp (*strp, "EVEN", 4) == 0)
    {
      *strp += 4;
      *valuep = 1;
    }
  else if (strncmp (*strp, "oe", 2) == 0 || strncmp (*strp, "OE", 2) == 0)
    {
      *strp += 2;
      *valuep = 2;
    }
  else
    errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, valuep);

 if ((errmsg == NULL) && (*valuep == 3))
    errmsg = _("invalid operand.  type may have values 0,1,2 only.");

  return errmsg;
}

/* -- dis.c */
static void print_dollarhex (CGEN_CPU_DESC, PTR, long, unsigned, bfd_vma, int);
static void print_pcrel (CGEN_CPU_DESC, PTR, long, unsigned, bfd_vma, int);

static void
print_dollarhex (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
		 void * dis_info,
		 long value,
		 unsigned int attrs ATTRIBUTE_UNUSED,
		 bfd_vma pc ATTRIBUTE_UNUSED,
		 int length ATTRIBUTE_UNUSED)
{
  disassemble_info *info = (disassemble_info *) dis_info;

  info->fprintf_func (info->stream, "$%lx", value);

  if (0)
    print_normal (cd, dis_info, value, attrs, pc, length);
}

static void
print_pcrel (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
	     void * dis_info,
	     long value,
	     unsigned int attrs ATTRIBUTE_UNUSED,
	     bfd_vma pc ATTRIBUTE_UNUSED,
	     int length ATTRIBUTE_UNUSED)
{
  print_address (cd, dis_info, value + pc, attrs, pc, length);
}

/* -- */