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[/] [or1k/] [trunk/] [insight/] [opcodes/] [m10200-dis.c] - Blame information for rev 1772

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1 578 markom 
/* Disassemble MN10200 instructions.
2 
   Copyright 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
3 
 
4 
This program is free software; you can redistribute it and/or modify
5 
it under the terms of the GNU General Public License as published by
6 
the Free Software Foundation; either version 2 of the License, or
7 
(at your option) any later version.
8 
 
9 
This program is distributed in the hope that it will be useful,
10 
but WITHOUT ANY WARRANTY; without even the implied warranty of
11 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 
GNU General Public License for more details.
13 
 
14 
You should have received a copy of the GNU General Public License
15 
along with this program; if not, write to the Free Software
16 
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
17 
 
18 
 
19 
#include <stdio.h>
20 
 
21 
#include "sysdep.h"
22 
#include "opcode/mn10200.h"
23 
#include "dis-asm.h"
24 
#include "opintl.h"
25 
 
26 
static void disassemble PARAMS ((bfd_vma, struct disassemble_info *,
27 
                                 unsigned long insn, unsigned long,
28 
                                 unsigned int));
29 
 
30 
int
31 
print_insn_mn10200 (memaddr, info)
32 
     bfd_vma memaddr;
33 
     struct disassemble_info *info;
34 
{
35 
  int status;
36 
  bfd_byte buffer[4];
37 
  unsigned long insn;
38 
  unsigned long extension = 0;
39 
  unsigned int consume;
40 
 
41 
  /* First figure out how big the opcode is.  */
42 
  status = (*info->read_memory_func) (memaddr, buffer, 1, info);
43 
  if (status != 0)
44 
    {
45 
      (*info->memory_error_func) (status, memaddr, info);
46 
      return -1;
47 
    }
48 
 
49 
  insn = *(unsigned char *) buffer;
50 
 
51 
  /* These are one byte insns.  */
52 
  if ((insn & 0xf0) == 0x00
53 
      || (insn & 0xf0) == 0x10
54 
      || (insn & 0xf0) == 0x20
55 
      || (insn & 0xf0) == 0x30
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      || ((insn & 0xf0) == 0x80
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          && (insn & 0x0c) >> 2 != (insn & 0x03))
58 
      || (insn & 0xf0) == 0x90
59 
      || (insn & 0xf0) == 0xa0
60 
      || (insn & 0xf0) == 0xb0
61 
      || (insn & 0xff) == 0xeb
62 
      || (insn & 0xff) == 0xf6
63 
      || (insn & 0xff) == 0xfe
64 
      || (insn & 0xff) == 0xff)
65 
    {
66 
      extension = 0;
67 
      consume = 1;
68 
    }
69 
 
70 
  /* These are two byte insns.  */
71 
  else if ((insn & 0xf0) == 0x40
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           || (insn & 0xf0) == 0x50
73 
           || (insn & 0xf0) == 0x60
74 
           || (insn & 0xf0) == 0x70
75 
           || (insn & 0xf0) == 0x80
76 
           || (insn & 0xfc) == 0xd0
77 
           || (insn & 0xfc) == 0xd4
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           || (insn & 0xfc) == 0xd8
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           || (insn & 0xfc) == 0xe0
80 
           || (insn & 0xfc) == 0xe4
81 
           || (insn & 0xff) == 0xe8
82 
           || (insn & 0xff) == 0xe9
83 
           || (insn & 0xff) == 0xea
84 
           || (insn & 0xff) == 0xf0
85 
           || (insn & 0xff) == 0xf1
86 
           || (insn & 0xff) == 0xf2
87 
           || (insn & 0xff) == 0xf3)
88 
    {
89 
      status = (*info->read_memory_func) (memaddr, buffer, 2, info);
90 
      if (status != 0)
91 
        {
92 
          (*info->memory_error_func) (status, memaddr, info);
93 
           return -1;
94 
        }
95 
      insn = bfd_getb16 (buffer);
96 
      consume = 2;
97 
    }
98 
 
99 
  /* These are three byte insns with a 16bit operand in little
100 
     endian form.  */
101 
  else if ((insn & 0xf0) == 0xc0
102 
           || (insn & 0xfc) == 0xdc
103 
           || (insn & 0xfc) == 0xec
104 
           || (insn & 0xff) == 0xf8
105 
           || (insn & 0xff) == 0xf9
106 
           || (insn & 0xff) == 0xfa
107 
           || (insn & 0xff) == 0xfb
108 
           || (insn & 0xff) == 0xfc
109 
           || (insn & 0xff) == 0xfd)
110 
    {
111 
      status = (*info->read_memory_func) (memaddr + 1, buffer, 2, info);
112 
      if (status != 0)
113 
        {
114 
          (*info->memory_error_func) (status, memaddr, info);
115 
          return -1;
116 
        }
117 
      insn <<= 16;
118 
      insn |= bfd_getl16 (buffer);
119 
      extension = 0;
120 
      consume = 3;
121 
    }
122 
  /* These are three byte insns too, but we don't have to mess with
123 
     endianness stuff.  */
124 
  else if ((insn & 0xff) == 0xf5)
125 
    {
126 
      status = (*info->read_memory_func) (memaddr + 1, buffer, 2, info);
127 
      if (status != 0)
128 
        {
129 
          (*info->memory_error_func) (status, memaddr, info);
130 
          return -1;
131 
        }
132 
      insn <<= 16;
133 
      insn |= bfd_getb16 (buffer);
134 
      extension = 0;
135 
      consume = 3;
136 
    }
137 
 
138 
  /* These are four byte insns.  */
139 
  else if ((insn & 0xff) == 0xf7)
140 
    {
141 
      status = (*info->read_memory_func) (memaddr, buffer, 2, info);
142 
      if (status != 0)
143 
        {
144 
          (*info->memory_error_func) (status, memaddr, info);
145 
          return -1;
146 
        }
147 
      insn = bfd_getb16 (buffer);
148 
      insn <<= 16;
149 
      status = (*info->read_memory_func) (memaddr + 2, buffer, 2, info);
150 
      if (status != 0)
151 
        {
152 
          (*info->memory_error_func) (status, memaddr, info);
153 
          return -1;
154 
        }
155 
      insn |= bfd_getl16 (buffer);
156 
      extension = 0;
157 
      consume = 4;
158 
    }
159 
 
160 
  /* These are five byte insns.  */
161 
  else if ((insn & 0xff) == 0xf4)
162 
    {
163 
      status = (*info->read_memory_func) (memaddr, buffer, 2, info);
164 
      if (status != 0)
165 
        {
166 
          (*info->memory_error_func) (status, memaddr, info);
167 
          return -1;
168 
        }
169 
      insn = bfd_getb16 (buffer);
170 
      insn <<= 16;
171 
 
172 
      status = (*info->read_memory_func) (memaddr + 4, buffer, 1, info);
173 
      if (status != 0)
174 
        {
175 
          (*info->memory_error_func) (status, memaddr, info);
176 
          return -1;
177 
        }
178 
      insn |= (*(unsigned char *)buffer << 8) & 0xff00;
179 
 
180 
      status = (*info->read_memory_func) (memaddr + 3, buffer, 1, info);
181 
      if (status != 0)
182 
        {
183 
          (*info->memory_error_func) (status, memaddr, info);
184 
          return -1;
185 
        }
186 
      insn |= (*(unsigned char *)buffer) & 0xff;
187 
 
188 
      status = (*info->read_memory_func) (memaddr + 2, buffer, 1, info);
189 
      if (status != 0)
190 
        {
191 
          (*info->memory_error_func) (status, memaddr, info);
192 
          return -1;
193 
        }
194 
      extension = (*(unsigned char *)buffer) & 0xff;
195 
      consume = 5;
196 
    }
197 
  else
198 
    {
199 
      (*info->fprintf_func) (info->stream, _("unknown\t0x%02x"), insn);
200 
      return 1;
201 
    }
202 
 
203 
  disassemble (memaddr, info, insn, extension, consume);
204 
 
205 
  return consume;
206 
}
207 
 
208 
static void
209 
disassemble (memaddr, info, insn, extension, size)
210 
     bfd_vma memaddr;
211 
     struct disassemble_info *info;
212 
     unsigned long insn;
213 
     unsigned long extension;
214 
     unsigned int size;
215 
{
216 
  struct mn10200_opcode *op = (struct mn10200_opcode *)mn10200_opcodes;
217 
  const struct mn10200_operand *operand;
218 
  int match = 0;
219 
 
220 
  /* Find the opcode.  */
221 
  while (op->name)
222 
    {
223 
      int mysize, extra_shift;
224 
 
225 
      if (op->format == FMT_1)
226 
        mysize = 1;
227 
      else if (op->format == FMT_2
228 
               || op->format == FMT_4)
229 
        mysize = 2;
230 
      else if (op->format == FMT_3
231 
               || op->format == FMT_5)
232 
        mysize = 3;
233 
      else if (op->format == FMT_6)
234 
        mysize = 4;
235 
      else if (op->format == FMT_7)
236 
        mysize = 5;
237 
      else
238 
        abort ();
239 
 
240 
      if (op->format == FMT_2 || op->format == FMT_5)
241 
        extra_shift = 8;
242 
      else if (op->format == FMT_3
243 
               || op->format == FMT_6
244 
               || op->format == FMT_7)
245 
        extra_shift = 16;
246 
      else
247 
        extra_shift = 0;
248 
 
249 
      if ((op->mask & insn) == op->opcode
250 
          && size == (unsigned int) mysize)
251 
        {
252 
          const unsigned char *opindex_ptr;
253 
          unsigned int nocomma;
254 
          int paren = 0;
255 
 
256 
          match = 1;
257 
          (*info->fprintf_func) (info->stream, "%s\t", op->name);
258 
 
259 
          /* Now print the operands.  */
260 
          for (opindex_ptr = op->operands, nocomma = 1;
261 
               *opindex_ptr != 0;
262 
               opindex_ptr++)
263 
            {
264 
              unsigned long value;
265 
 
266 
              operand = &mn10200_operands[*opindex_ptr];
267 
 
268 
              if ((operand->flags & MN10200_OPERAND_EXTENDED) != 0)
269 
                {
270 
                  value = (insn & 0xffff) << 8;
271 
                  value |= extension;
272 
                }
273 
              else
274 
                {
275 
                  value = ((insn >> (operand->shift))
276 
                           & ((1L << operand->bits) - 1L));
277 
                }
278 
 
279 
              if ((operand->flags & MN10200_OPERAND_SIGNED) != 0)
280 
                value = ((long)(value << (32 - operand->bits))
281 
                          >> (32 - operand->bits));
282 
 
283 
              if (!nocomma
284 
                  && (!paren
285 
                      || ((operand->flags & MN10200_OPERAND_PAREN) == 0)))
286 
                (*info->fprintf_func) (info->stream, ",");
287 
 
288 
              nocomma = 0;
289 
 
290 
              if ((operand->flags & MN10200_OPERAND_DREG) != 0)
291 
                {
292 
                  value = ((insn >> (operand->shift + extra_shift))
293 
                           & ((1 << operand->bits) - 1));
294 
                  (*info->fprintf_func) (info->stream, "d%d", value);
295 
                }
296 
 
297 
              else if ((operand->flags & MN10200_OPERAND_AREG) != 0)
298 
                {
299 
                  value = ((insn >> (operand->shift + extra_shift))
300 
                           & ((1 << operand->bits) - 1));
301 
                  (*info->fprintf_func) (info->stream, "a%d", value);
302 
                }
303 
 
304 
              else if ((operand->flags & MN10200_OPERAND_PSW) != 0)
305 
                (*info->fprintf_func) (info->stream, "psw");
306 
 
307 
              else if ((operand->flags & MN10200_OPERAND_MDR) != 0)
308 
                (*info->fprintf_func) (info->stream, "mdr");
309 
 
310 
              else if ((operand->flags & MN10200_OPERAND_PAREN) != 0)
311 
                {
312 
                  if (paren)
313 
                    (*info->fprintf_func) (info->stream, ")");
314 
                  else
315 
                    {
316 
                      (*info->fprintf_func) (info->stream, "(");
317 
                      nocomma = 1;
318 
                    }
319 
                  paren = !paren;
320 
                }
321 
 
322 
              else if ((operand->flags & MN10200_OPERAND_PCREL) != 0)
323 
                (*info->print_address_func) ((value + memaddr + mysize) & 0xffffff, info);
324 
 
325 
              else if ((operand->flags & MN10200_OPERAND_MEMADDR) != 0)
326 
                (*info->print_address_func) (value, info);
327 
 
328 
              else
329 
                (*info->fprintf_func) (info->stream, "%ld", value);
330 
            }
331 
          /* All done. */
332 
          break;
333 
        }
334 
      op++;
335 
    }
336 
 
337 
  if (!match)
338 
    {
339 
        (*info->fprintf_func) (info->stream, _("unknown\t0x%04lx"), insn);
340 
    }
341 
}

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