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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/* Opcode decoder for the Renesas RX
Copyright 2008, 2009, 2010
Free Software Foundation, Inc.
Written by DJ Delorie <dj@redhat.com>
This file is part of GDB, the GNU Debugger and GAS, the GNU Assembler.
This program 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 of the License, or
(at your option) any later version.
This program 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. */
/* The RX decoder in libopcodes is used by the simulator, gdb's
analyzer, and the disassembler. Given an opcode data source,
it decodes the next opcode into the following structures. */
typedef enum
{
RX_AnySize = 0,
RX_Byte, /* undefined extension */
RX_UByte,
RX_SByte,
RX_Word, /* undefined extension */
RX_UWord,
RX_SWord,
RX_3Byte,
RX_Long,
} RX_Size;
typedef enum
{
RX_Operand_None,
RX_Operand_Immediate, /* #addend */
RX_Operand_Register, /* Rn */
RX_Operand_Indirect, /* [Rn + addend] */
RX_Operand_Postinc, /* [Rn+] */
RX_Operand_Predec, /* [-Rn] */
RX_Operand_Condition, /* eq, gtu, etc */
RX_Operand_Flag, /* [UIOSZC] */
} RX_Operand_Type;
typedef enum
{
RXO_unknown,
RXO_mov, /* d = s (signed) */
RXO_movbi, /* d = [s,s2] (signed) */
RXO_movbir, /* [s,s2] = d (signed) */
RXO_pushm, /* s..s2 */
RXO_popm, /* s..s2 */
RXO_xchg, /* s <-> d */
RXO_stcc, /* d = s if cond(s2) */
RXO_rtsd, /* rtsd, 1=imm, 2-0 = reg if reg type */
/* These are all either d OP= s or, if s2 is set, d = s OP s2. Note
that d may be "None". */
RXO_and,
RXO_or,
RXO_xor,
RXO_add,
RXO_sub,
RXO_mul,
RXO_div,
RXO_divu,
RXO_shll,
RXO_shar,
RXO_shlr,
RXO_adc, /* d = d + s + carry */
RXO_sbb, /* d = d - s - ~carry */
RXO_abs, /* d = |s| */
RXO_max, /* d = max(d,s) */
RXO_min, /* d = min(d,s) */
RXO_emul, /* d:64 = d:32 * s */
RXO_emulu, /* d:64 = d:32 * s (unsigned) */
RXO_ediv, /* d:64 / s; d = quot, d+1 = rem */
RXO_edivu, /* d:64 / s; d = quot, d+1 = rem */
RXO_rolc, /* d <<= 1 through carry */
RXO_rorc, /* d >>= 1 through carry*/
RXO_rotl, /* d <<= #s without carry */
RXO_rotr, /* d >>= #s without carry*/
RXO_revw, /* d = revw(s) */
RXO_revl, /* d = revl(s) */
RXO_branch, /* pc = d if cond(s) */
RXO_branchrel,/* pc += d if cond(s) */
RXO_jsr, /* pc = d */
RXO_jsrrel, /* pc += d */
RXO_rts,
RXO_nop,
RXO_nop2,
RXO_nop3,
RXO_scmpu,
RXO_smovu,
RXO_smovb,
RXO_suntil,
RXO_swhile,
RXO_smovf,
RXO_sstr,
RXO_rmpa,
RXO_mulhi,
RXO_mullo,
RXO_machi,
RXO_maclo,
RXO_mvtachi,
RXO_mvtaclo,
RXO_mvfachi,
RXO_mvfacmi,
RXO_mvfaclo,
RXO_racw,
RXO_sat, /* sat(d) */
RXO_satr,
RXO_fadd, /* d op= s */
RXO_fcmp,
RXO_fsub,
RXO_ftoi,
RXO_fmul,
RXO_fdiv,
RXO_round,
RXO_itof,
RXO_bset, /* d |= (1<<s) */
RXO_bclr, /* d &= ~(1<<s) */
RXO_btst, /* s & (1<<s2) */
RXO_bnot, /* d ^= (1<<s) */
RXO_bmcc, /* d<s> = cond(s2) */
RXO_clrpsw, /* flag index in d */
RXO_setpsw, /* flag index in d */
RXO_mvtipl, /* new IPL in s */
RXO_rtfi,
RXO_rte,
RXO_rtd, /* undocumented */
RXO_brk,
RXO_dbt, /* undocumented */
RXO_int, /* vector id in s */
RXO_stop,
RXO_wait,
RXO_sccnd, /* d = cond(s) ? 1 : 0 */
} RX_Opcode_ID;
/* Condition bitpatterns, as registers. */
#define RXC_eq 0
#define RXC_z 0
#define RXC_ne 1
#define RXC_nz 1
#define RXC_c 2
#define RXC_nc 3
#define RXC_gtu 4
#define RXC_leu 5
#define RXC_pz 6
#define RXC_n 7
#define RXC_ge 8
#define RXC_lt 9
#define RXC_gt 10
#define RXC_le 11
#define RXC_o 12
#define RXC_no 13
#define RXC_always 14
#define RXC_never 15
typedef struct
{
RX_Operand_Type type;
int reg;
int addend;
RX_Size size;
} RX_Opcode_Operand;
typedef struct
{
RX_Opcode_ID id;
int n_bytes;
int prefix;
char * syntax;
RX_Size size;
/* By convention, these are destination, source1, source2. */
RX_Opcode_Operand op[3];
/* The logic here is:
newflags = (oldflags & ~(int)flags_0) | flags_1 | (op_flags & flags_s)
Only the O, S, Z, and C flags are affected. */
char flags_0; /* This also clears out flags-to-be-set. */
char flags_1;
char flags_s;
} RX_Opcode_Decoded;
/* Within the syntax, %c-style format specifiers are as follows:
%% = '%' character
%0 = operand[0] (destination)
%1 = operand[1] (source)
%2 = operand[2] (2nd source)
%s = operation size (b/w/l)
%SN = operand size [N] (N=0,1,2)
%aN = op[N] as an address (N=0,1,2)
Register numbers 0..15 are general registers. 16..31 are control
registers. 32..47 are condition codes. */
int rx_decode_opcode (unsigned long, RX_Opcode_Decoded *, int (*)(void *), void *);
|
