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
|
/* Disassemble moxie instructions.
Copyright 2009
Free Software Foundation, Inc.
This file is part of the GNU opcodes library.
This library 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 3, or (at your option)
any later version.
It 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. */
#include <stdio.h>
#include "sysdep.h"
#define STATIC_TABLE
#define DEFINE_TABLE
#include "opcode/moxie.h"
#include "dis-asm.h"
static fprintf_ftype fpr;
static void *stream;
/* Macros to extract operands from the instruction word. */
#define OP_A(i) ((i >> 4) & 0xf)
#define OP_B(i) (i & 0xf)
#define INST2OFFSET(o) ((((signed short)((o & ((1<<10)-1))<<6))>>6)<<1)
static const char * reg_names[16] =
{ "$fp", "$sp", "$r0", "$r1", "$r2", "$r3", "$r4", "$r5",
"$r6", "$r7", "$r8", "$r9", "$r10", "$r11", "$r12", "$r13" };
int
print_insn_moxie (bfd_vma addr, struct disassemble_info * info)
{
int length = 2;
int status;
stream = info->stream;
const moxie_opc_info_t * opcode;
bfd_byte buffer[4];
unsigned short iword;
fpr = info->fprintf_func;
if ((status = info->read_memory_func (addr, buffer, 2, info)))
goto fail;
iword = bfd_getb16 (buffer);
/* Form 1 instructions have the high bit set to 0. */
if ((iword & (1<<15)) == 0)
{
/* Extract the Form 1 opcode. */
opcode = &moxie_form1_opc_info[iword >> 8];
switch (opcode->itype)
{
case MOXIE_F1_NARG:
fpr (stream, "%s", opcode->name);
break;
case MOXIE_F1_A:
fpr (stream, "%s\t%s", opcode->name,
reg_names[OP_A(iword)]);
break;
case MOXIE_F1_AB:
fpr (stream, "%s\t%s, %s", opcode->name,
reg_names[OP_A(iword)],
reg_names[OP_B(iword)]);
break;
case MOXIE_F1_A4:
{
unsigned imm;
if ((status = info->read_memory_func (addr + 2, buffer, 4, info)))
goto fail;
imm = bfd_getb32 (buffer);
fpr (stream, "%s\t%s, 0x%x", opcode->name,
reg_names[OP_A(iword)], imm);
length = 6;
}
break;
case MOXIE_F1_4:
{
unsigned imm;
if ((status = info->read_memory_func (addr + 2, buffer, 4, info)))
goto fail;
imm = bfd_getb32 (buffer);
fpr (stream, "%s\t0x%x", opcode->name, imm);
length = 6;
}
break;
case MOXIE_F1_M:
{
unsigned imm;
if ((status = info->read_memory_func (addr + 2, buffer, 4, info)))
goto fail;
imm = bfd_getb32 (buffer);
fpr (stream, "%s\t", opcode->name);
info->print_address_func ((bfd_vma) imm, info);
length = 6;
}
break;
case MOXIE_F1_AiB:
fpr (stream, "%s\t(%s), %s", opcode->name,
reg_names[OP_A(iword)], reg_names[OP_B(iword)]);
break;
case MOXIE_F1_ABi:
fpr (stream, "%s\t%s, (%s)", opcode->name,
reg_names[OP_A(iword)], reg_names[OP_B(iword)]);
break;
case MOXIE_F1_4A:
{
unsigned imm;
if ((status = info->read_memory_func (addr + 2, buffer, 4, info)))
goto fail;
imm = bfd_getb32 (buffer);
fpr (stream, "%s\t0x%x, %s",
opcode->name, imm, reg_names[OP_A(iword)]);
length = 6;
}
break;
case MOXIE_F1_AiB4:
{
unsigned imm;
if ((status = info->read_memory_func (addr+2, buffer, 4, info)))
goto fail;
imm = bfd_getb32 (buffer);
fpr (stream, "%s\t0x%x(%s), %s", opcode->name,
imm,
reg_names[OP_A(iword)],
reg_names[OP_B(iword)]);
length = 6;
}
break;
case MOXIE_F1_ABi4:
{
unsigned imm;
if ((status = info->read_memory_func (addr+2, buffer, 4, info)))
goto fail;
imm = bfd_getb32 (buffer);
fpr (stream, "%s\t%s, 0x%x(%s)",
opcode->name,
reg_names[OP_A(iword)],
imm,
reg_names[OP_B(iword)]);
length = 6;
}
break;
default:
abort ();
}
}
else if ((iword & (1<<14)) == 0)
{
/* Extract the Form 2 opcode. */
opcode = &moxie_form2_opc_info[(iword >> 12) & 3];
switch (opcode->itype)
{
case MOXIE_F2_A8V:
fpr (stream, "%s\t%s, 0x%x",
opcode->name,
reg_names[(iword >> 8) & 0xf],
iword & ((1 << 8) - 1));
break;
case MOXIE_F2_NARG:
fpr (stream, "%s", opcode->name);
break;
default:
abort();
}
}
else
{
/* Extract the Form 3 opcode. */
opcode = &moxie_form3_opc_info[(iword >> 10) & 15];
switch (opcode->itype)
{
case MOXIE_F3_PCREL:
fpr (stream, "%s\t", opcode->name);
info->print_address_func ((bfd_vma) (addr + INST2OFFSET(iword)),
info);
break;
default:
abort();
}
}
return length;
fail:
info->memory_error_func (status, addr, info);
return -1;
}
|
