1 /* Disassemble h8500 instructions.
2 Copyright (C) 1993 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
20 #define DISASSEMBLER_TABLE
23 #include "h8500-opc.h"
26 /* Maximum length of an instruction. */
33 /* Points to first byte not fetched. */
34 bfd_byte *max_fetched;
35 bfd_byte the_buffer[MAXLEN];
40 /* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
41 to ADDR (exclusive) are valid. Returns 1 for success, longjmps
43 #define FETCH_DATA(info, addr) \
44 ((addr) <= ((struct private *)(info->private_data))->max_fetched \
45 ? 1 : fetch_data ((info), (addr)))
48 fetch_data (info, addr)
49 struct disassemble_info *info;
53 struct private *priv = (struct private *)info->private_data;
54 bfd_vma start = priv->insn_start + (priv->max_fetched - priv->the_buffer);
56 status = (*info->read_memory_func) (start,
58 addr - priv->max_fetched,
62 (*info->memory_error_func) (status, start, info);
63 longjmp (priv->bailout);
66 priv->max_fetched = addr;
70 static char *crname[] =
71 {"sr", "ccr", "*", "br", "ep", "dp", "*", "tp"};
74 print_insn_h8500 (addr, info)
76 disassemble_info *info;
78 h8500_opcode_info *opcode;
79 void *stream = info->stream;
80 fprintf_ftype func = info->fprintf_func;
83 bfd_byte *buffer = priv.the_buffer;
85 info->private_data = (PTR) &priv;
86 priv.max_fetched = priv.the_buffer;
87 priv.insn_start = addr;
88 if (setjmp (priv.bailout) != 0)
92 /* Run down the table to find the one which matches */
93 for (opcode = h8500_table; opcode->name; opcode++)
106 for (byte = 0; byte < opcode->length; byte++)
108 FETCH_DATA (info, buffer + byte + 1);
109 if ((buffer[byte] & opcode->bytes[byte].mask)
110 != (opcode->bytes[byte].contents))
116 /* extract any info parts */
117 switch (opcode->bytes[byte].insert)
123 func (stream, "can't cope with insert %d\n",
124 opcode->bytes[byte].insert);
127 rn = buffer[byte] & 0x7;
130 rs = buffer[byte] & 0x7;
133 cr = buffer[byte] & 0x7;
138 cr = buffer[byte] & 0x7;
143 FETCH_DATA (info, buffer + byte + 2);
144 disp = (buffer[byte] << 8) | (buffer[byte + 1]);
148 disp = ((char) (buffer[byte]));
152 rd = buffer[byte] & 0x7;
155 FETCH_DATA (info, buffer + byte + 3);
158 | (buffer[byte + 1] << 8)
159 | (buffer[byte + 2]);
162 FETCH_DATA (info, buffer + byte + 2);
163 abs = (buffer[byte] << 8) | (buffer[byte + 1]);
166 abs = (buffer[byte]);
169 FETCH_DATA (info, buffer + byte + 2);
170 imm = (buffer[byte] << 8) | (buffer[byte + 1]);
173 imm = (buffer[byte]) & 0xf;
177 imm = (buffer[byte]);
180 FETCH_DATA (info, buffer + byte + 2);
181 pcrel = (buffer[byte] << 8) | (buffer[byte + 1]);
184 pcrel = (buffer[byte]);
187 switch (buffer[byte] & 0x7)
207 /* We get here when all the masks have passed so we can output the
209 FETCH_DATA (info, buffer + opcode->length);
210 for (i = 0; i < opcode->length; i++)
212 (func) (stream, "%02x ", buffer[i]);
216 (func) (stream, " ");
218 (func) (stream, "%s\t", opcode->name);
219 for (i = 0; i < opcode->nargs; i++)
222 (func) (stream, ",");
223 switch (opcode->arg_type[i])
229 func (stream, "@(0x%x:16,r%d)", disp, rn);
232 func (stream, "@(0x%x:8 (%d),r%d)", disp & 0xff, disp, rn);
235 func (stream, "@(0x%x:16,r%d)", disp, rd);
238 func (stream, "@(0x%x:8 (%d), r%d)", disp & 0xff, disp, rd);
241 func (stream, "@(0x%x:8 (%d), fp)", disp & 0xff, disp, rn);
245 func (stream, "%s", crname[cr]);
248 func (stream, "r%d", rn);
251 func (stream, "r%d", rd);
254 func (stream, "r%d", rs);
257 func (stream, "@-r%d", rn);
260 func (stream, "@r%d+", rn);
263 func (stream, "@r%d", rn);
266 func (stream, "@r%d", rd);
269 func (stream, "@sp+");
272 func (stream, "@-sp");
275 func (stream, "@0x%0x:24", abs);
278 func (stream, "@0x%0x:16", abs & 0xffff);
281 func (stream, "@0x%0x:8", abs & 0xff);
284 func (stream, "#0x%0x:16", imm & 0xffff);
291 for (i = 0; i < 8; i++)
299 func (stream, "r%d", i);
305 func (stream, "#0x%0x:8", imm & 0xff);
308 func (stream, "0x%0x:16", (pcrel + addr + opcode->length) & 0xffff);
311 func (stream, "#0x%0x:8",
312 ((char) pcrel + addr + opcode->length) & 0xffff);
315 func (stream, "#%d:q", qim);
318 func (stream, "#%d:4", imm);
322 return opcode->length;
326 /* Couldn't understand anything */
327 func (stream, "%02x\t\t*unknown*", buffer[0]);