1 /* Disassemble h8300 instructions.
2 Copyright (C) 1993, 1998, 2000 Free Software Foundation, Inc.
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.
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.
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. */
21 #define h8_opcodes h8ops
22 #include "opcode/h8300.h"
26 /* Run through the opcodes and sort them into order to make them easy
29 bfd_h8_disassemble_init ()
34 for (p = h8_opcodes; p->name; p++)
39 if ((int) p->data.nib[0] < 16)
40 n1 = (int) p->data.nib[0];
44 if ((int) p->data.nib[1] < 16)
45 n2 = (int) p->data.nib[1];
49 /* Just make sure there are an even number of nibbles in it, and
50 that the count is the same as the length. */
51 for (i = 0; p->data.nib[i] != E; i++)
62 bfd_h8_disassemble (addr, info, mode)
64 disassemble_info *info;
67 /* Find the first entry in the table for this opcode. */
68 static CONST char *regnames[] =
70 "r0h", "r1h", "r2h", "r3h", "r4h", "r5h", "r6h", "r7h",
71 "r0l", "r1l", "r2l", "r3l", "r4l", "r5l", "r6l", "r7l"
73 static CONST char *wregnames[] =
75 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
76 "e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7"
78 static CONST char *lregnames[] =
80 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7",
81 "er0", "er1", "er2", "er3", "er4", "er5", "er6", "er7"
89 static boolean init = 0;
90 struct h8_opcode *q = h8_opcodes;
91 char CONST **pregnames = mode != 0 ? lregnames : wregnames;
94 unsigned char data[20];
95 void *stream = info->stream;
96 fprintf_ftype fprintf = info->fprintf_func;
100 bfd_h8_disassemble_init ();
104 status = info->read_memory_func (addr, data, 2, info);
107 info->memory_error_func (status, addr, info);
111 for (l = 2; status == 0 && l < 10; l += 2)
112 status = info->read_memory_func (addr + l, data + l, 2, info);
114 /* Find the exact opcode/arg combo. */
118 unsigned int len = 0;
124 op_type looking_for = *nib;
125 int thisnib = data[len >> 1];
127 thisnib = (len & 1) ? (thisnib & 0xf) : ((thisnib >> 4) & 0xf);
129 if (looking_for < 16 && looking_for >= 0)
131 if (looking_for != thisnib)
136 if ((int) looking_for & (int) B31)
138 if (!(((int) thisnib & 0x8) != 0))
141 looking_for = (op_type) ((int) looking_for & ~(int) B31);
144 if ((int) looking_for & (int) B30)
146 if (!(((int) thisnib & 0x8) == 0))
149 looking_for = (op_type) ((int) looking_for & ~(int) B30);
152 if (looking_for & DBIT)
154 /* Exclude adds/subs by looking at bit 0 and 2, and
155 make sure the operand size, either w or l,
156 matches by looking at bit 1. */
157 if ((looking_for & 7) != (thisnib & 7))
160 abs = (thisnib & 0x8) ? 2 : 1;
162 else if (looking_for & (REG | IND | INC | DEC))
164 if (looking_for & SRC)
169 else if (looking_for & L_16)
171 abs = (data[len >> 1]) * 256 + data[(len + 2) >> 1];
174 else if (looking_for & ABSJMP)
176 abs = (data[1] << 16) | (data[2] << 8) | (data[3]);
178 else if (looking_for & MEMIND)
182 else if (looking_for & L_32)
186 abs = (data[i] << 24)
187 | (data[i + 1] << 16)
193 else if (looking_for & L_24)
197 abs = (data[i] << 16) | (data[i + 1] << 8) | (data[i + 2]);
200 else if (looking_for & IGNORE)
204 else if (looking_for & DISPREG)
208 else if (looking_for & KBIT)
225 else if (looking_for & L_8)
228 abs = data[len >> 1];
230 else if (looking_for & L_3)
234 else if (looking_for & L_2)
239 else if (looking_for & MACREG)
241 abs = (thisnib == 3);
243 else if (looking_for == E)
247 for (i = 0; i < q->length; i++)
248 fprintf (stream, "%02x ", data[i]);
251 fprintf (stream, " ");
253 fprintf (stream, "%s\t", q->name);
255 /* Gross. Disgusting. */
256 if (strcmp (q->name, "ldm.l") == 0)
260 count = (data[1] >> 4) & 0x3;
261 high = data[3] & 0x7;
263 fprintf (stream, "@sp+,er%d-er%d", high - count, high);
267 if (strcmp (q->name, "stm.l") == 0)
271 count = (data[1] >> 4) & 0x3;
274 fprintf (stream, "er%d-er%d,@-sp", low, low + count);
278 /* Fill in the args. */
280 op_type *args = q->args.nib;
288 fprintf (stream, ",");
292 fprintf (stream, "#0x%x", (unsigned) bit);
294 else if (x & (IMM | KBIT | DBIT))
296 /* Bletch. For shal #2,er0 and friends. */
297 if (*(args + 1) & SRC_IN_DST)
300 fprintf (stream, "#0x%x", (unsigned) abs);
304 int rn = (x & DST) ? rd : rs;
309 fprintf (stream, "%s", regnames[rn]);
312 fprintf (stream, "%s", wregnames[rn]);
316 fprintf (stream, "%s", lregnames[rn]);
322 fprintf (stream, "mac%c", abs ? 'l' : 'h');
326 fprintf (stream, "@%s+", pregnames[rs]);
330 fprintf (stream, "@-%s", pregnames[rd]);
334 int rn = (x & DST) ? rd : rs;
335 fprintf (stream, "@%s", pregnames[rn]);
337 else if (x & ABS8MEM)
339 fprintf (stream, "@0x%x:8", (unsigned) abs);
341 else if (x & (ABS | ABSJMP))
343 fprintf (stream, "@0x%x:%d", (unsigned) abs, plen);
347 fprintf (stream, "@@%d (%x)", abs, abs);
356 (short) abs > 0 ? "+" : "",
357 (short) abs, addr + (short) abs + 2);
363 (char) abs > 0 ? "+" : "",
364 (char) abs, addr + (char) abs + 2);
369 fprintf (stream, "@(0x%x:%d,%s)",
370 abs, plen, pregnames[rdisp]);
374 fprintf (stream, "ccr");
378 fprintf (stream, "exr");
381 /* xgettext:c-format */
382 fprintf (stream, _("Hmmmm %x"), x);
392 /* xgettext:c-format */
393 fprintf (stream, _("Don't understand %x \n"), looking_for);
404 /* Fell off the end. */
405 fprintf (stream, "%02x %02x .word\tH'%x,H'%x",
412 print_insn_h8300 (addr, info)
414 disassemble_info *info;
416 return bfd_h8_disassemble (addr, info, 0);
420 print_insn_h8300h (addr, info)
422 disassemble_info *info;
424 return bfd_h8_disassemble (addr, info, 1);
428 print_insn_h8300s (addr, info)
430 disassemble_info *info;
432 return bfd_h8_disassemble (addr, info, 2);