source: trunk/src/binutils/opcodes/d10v-dis.c@ 581

Last change on this file since 581 was 10, checked in by bird, 22 years ago

Initial revision
  • Property cvs2svn:cvs-rev set to 1.1
  • Property svn:eol-style set to native
  • Property svn:executable set to *
File size: 7.5 KB
Line 
1/* Disassemble D10V instructions.
2 Copyright 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
3
4This program is free software; you can redistribute it and/or modify
5it under the terms of the GNU General Public License as published by
6the Free Software Foundation; either version 2 of the License, or
7(at your option) any later version.
8
9This program is distributed in the hope that it will be useful,
10but WITHOUT ANY WARRANTY; without even the implied warranty of
11MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12GNU General Public License for more details.
13
14You should have received a copy of the GNU General Public License
15along with this program; if not, write to the Free Software
16Foundation, 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/d10v.h"
23#include "dis-asm.h"
24
25/* the PC wraps at 18 bits, except for the segment number */
26/* so use this mask to keep the parts we want */
27#define PC_MASK 0x0303FFFF
28
29static void dis_2_short PARAMS ((unsigned long insn, bfd_vma memaddr,
30 struct disassemble_info *info, int order));
31static void dis_long PARAMS ((unsigned long insn, bfd_vma memaddr,
32 struct disassemble_info *info));
33
34int
35print_insn_d10v (memaddr, info)
36 bfd_vma memaddr;
37 struct disassemble_info *info;
38{
39 int status;
40 bfd_byte buffer[4];
41 unsigned long insn;
42
43 status = (*info->read_memory_func) (memaddr, buffer, 4, info);
44 if (status != 0)
45 {
46 (*info->memory_error_func) (status, memaddr, info);
47 return -1;
48 }
49 insn = bfd_getb32 (buffer);
50
51 status = insn & FM11;
52 switch (status) {
53 case 0:
54 dis_2_short (insn, memaddr, info, 2);
55 break;
56 case FM01:
57 dis_2_short (insn, memaddr, info, 0);
58 break;
59 case FM10:
60 dis_2_short (insn, memaddr, info, 1);
61 break;
62 case FM11:
63 dis_long (insn, memaddr, info);
64 break;
65 }
66 return 4;
67}
68
69static void
70print_operand (oper, insn, op, memaddr, info)
71 struct d10v_operand *oper;
72 unsigned long insn;
73 struct d10v_opcode *op;
74 bfd_vma memaddr;
75 struct disassemble_info *info;
76{
77 int num, shift;
78
79 if (oper->flags == OPERAND_ATMINUS)
80 {
81 (*info->fprintf_func) (info->stream, "@-");
82 return;
83 }
84 if (oper->flags == OPERAND_MINUS)
85 {
86 (*info->fprintf_func) (info->stream, "-");
87 return;
88 }
89 if (oper->flags == OPERAND_PLUS)
90 {
91 (*info->fprintf_func) (info->stream, "+");
92 return;
93 }
94 if (oper->flags == OPERAND_ATSIGN)
95 {
96 (*info->fprintf_func) (info->stream, "@");
97 return;
98 }
99 if (oper->flags == OPERAND_ATPAR)
100 {
101 (*info->fprintf_func) (info->stream, "@(");
102 return;
103 }
104
105 shift = oper->shift;
106
107 /* the LONG_L format shifts registers over by 15 */
108 if (op->format == LONG_L && (oper->flags & OPERAND_REG))
109 shift += 15;
110
111 num = (insn >> shift) & (0x7FFFFFFF >> (31 - oper->bits));
112
113 if (oper->flags & OPERAND_REG)
114 {
115 int i;
116 int match=0;
117 num += (oper->flags
118 & (OPERAND_GPR|OPERAND_FFLAG|OPERAND_CFLAG|OPERAND_CONTROL));
119 if (oper->flags & (OPERAND_ACC0|OPERAND_ACC1))
120 num += num ? OPERAND_ACC1 : OPERAND_ACC0;
121 for (i = 0; i < d10v_reg_name_cnt(); i++)
122 {
123 if (num == d10v_predefined_registers[i].value)
124 {
125 if (d10v_predefined_registers[i].pname)
126 (*info->fprintf_func) (info->stream, "%s",d10v_predefined_registers[i].pname);
127 else
128 (*info->fprintf_func) (info->stream, "%s",d10v_predefined_registers[i].name);
129 match=1;
130 break;
131 }
132 }
133 if (match == 0)
134 {
135 /* this would only get executed if a register was not in the
136 register table */
137 if (oper->flags & (OPERAND_ACC0|OPERAND_ACC1))
138 (*info->fprintf_func) (info->stream, "a");
139 else if (oper->flags & OPERAND_CONTROL)
140 (*info->fprintf_func) (info->stream, "cr");
141 else if(oper->flags & OPERAND_REG)
142 (*info->fprintf_func) (info->stream, "r");
143 (*info->fprintf_func) (info->stream, "%d",num);
144 }
145 }
146 else
147 {
148 /* addresses are right-shifted by 2 */
149 if (oper->flags & OPERAND_ADDR)
150 {
151 long max;
152 int neg=0;
153 max = (1 << (oper->bits - 1));
154 if (num & max)
155 {
156 num = -num & ((1 << oper->bits)-1);
157 neg = 1;
158 }
159 num = num<<2;
160 if (info->flags & INSN_HAS_RELOC)
161 (*info->print_address_func) (num & PC_MASK, info);
162 else
163 {
164 if (neg)
165 (*info->print_address_func) ((memaddr - num) & PC_MASK, info);
166 else
167 (*info->print_address_func) ((memaddr + num) & PC_MASK, info);
168 }
169 }
170 else
171 {
172 if (oper->flags & OPERAND_SIGNED)
173 {
174 int max = (1 << (oper->bits - 1));
175 if (num & max)
176 {
177 num = -num & ((1 << oper->bits)-1);
178 (*info->fprintf_func) (info->stream, "-");
179 }
180 }
181 (*info->fprintf_func) (info->stream, "0x%x",num);
182 }
183 }
184}
185
186
187static void
188dis_long (insn, memaddr, info)
189 unsigned long insn;
190 bfd_vma memaddr;
191 struct disassemble_info *info;
192{
193 int i;
194 char buf[32];
195 struct d10v_opcode *op = (struct d10v_opcode *)d10v_opcodes;
196 struct d10v_operand *oper;
197 int need_paren = 0;
198 int match = 0;
199
200 while (op->name)
201 {
202 if ((op->format & LONG_OPCODE) && ((op->mask & insn) == op->opcode))
203 {
204 match = 1;
205 (*info->fprintf_func) (info->stream, "%s\t", op->name);
206 for ( i=0; op->operands[i]; i++)
207 {
208 oper = (struct d10v_operand *)&d10v_operands[op->operands[i]];
209 if (oper->flags == OPERAND_ATPAR)
210 need_paren = 1;
211 print_operand (oper, insn, op, memaddr, info);
212 if (op->operands[i+1] && oper->bits &&
213 d10v_operands[op->operands[i+1]].flags != OPERAND_PLUS &&
214 d10v_operands[op->operands[i+1]].flags != OPERAND_MINUS)
215 (*info->fprintf_func) (info->stream, ", ");
216 }
217 break;
218 }
219 op++;
220 }
221
222 if (!match)
223 (*info->fprintf_func) (info->stream, ".long\t0x%08x",insn);
224
225 if (need_paren)
226 (*info->fprintf_func) (info->stream, ")");
227}
228
229static void
230dis_2_short (insn, memaddr, info, order)
231 unsigned long insn;
232 bfd_vma memaddr;
233 struct disassemble_info *info;
234 int order;
235{
236 int i,j;
237 char astr[2][32];
238 unsigned int ins[2];
239 struct d10v_opcode *op;
240 char buf[32];
241 int match, num_match=0;
242 struct d10v_operand *oper;
243 int need_paren = 0;
244
245 ins[0] = (insn & 0x3FFFFFFF) >> 15;
246 ins[1] = insn & 0x00007FFF;
247
248 for(j=0;j<2;j++)
249 {
250 op = (struct d10v_opcode *)d10v_opcodes;
251 match=0;
252 while (op->name)
253 {
254 if ((op->format & SHORT_OPCODE) && ((op->mask & ins[j]) == op->opcode))
255 {
256 (*info->fprintf_func) (info->stream, "%s\t",op->name);
257 for (i=0; op->operands[i]; i++)
258 {
259 oper = (struct d10v_operand *)&d10v_operands[op->operands[i]];
260 if (oper->flags == OPERAND_ATPAR)
261 need_paren = 1;
262 print_operand (oper, ins[j], op, memaddr, info);
263 if (op->operands[i+1] && oper->bits &&
264 d10v_operands[op->operands[i+1]].flags != OPERAND_PLUS &&
265 d10v_operands[op->operands[i+1]].flags != OPERAND_MINUS)
266 (*info->fprintf_func) (info->stream, ", ");
267 }
268 match = 1;
269 num_match++;
270 break;
271 }
272 op++;
273 }
274 if (!match)
275 (*info->fprintf_func) (info->stream, "unknown");
276
277 switch (order)
278 {
279 case 0:
280 (*info->fprintf_func) (info->stream, "\t->\t");
281 order = -1;
282 break;
283 case 1:
284 (*info->fprintf_func) (info->stream, "\t<-\t");
285 order = -1;
286 break;
287 case 2:
288 (*info->fprintf_func) (info->stream, "\t||\t");
289 order = -1;
290 break;
291 default:
292 break;
293 }
294 }
295
296 if (num_match == 0)
297 (*info->fprintf_func) (info->stream, ".long\t0x%08x",insn);
298
299 if (need_paren)
300 (*info->fprintf_func) (info->stream, ")");
301}
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