1 /* Disassemble moxie instructions.
3 Free Software Foundation, Inc.
5 This file is part of the GNU opcodes library.
7 This library is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 It is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
28 #include "opcode/moxie.h"
31 static fprintf_ftype fpr
;
34 /* Macros to extract operands from the instruction word. */
35 #define OP_A(i) ((i >> 4) & 0xf)
36 #define OP_B(i) (i & 0xf)
37 #define INST2OFFSET(o) ((((signed short)((o & ((1<<10)-1))<<6))>>6)<<1)
39 static const char * reg_names
[16] =
40 { "$fp", "$sp", "$r0", "$r1", "$r2", "$r3", "$r4", "$r5",
41 "$r6", "$r7", "$r8", "$r9", "$r10", "$r11", "$r12", "$r13" };
44 print_insn_moxie (bfd_vma addr
, struct disassemble_info
* info
)
48 stream
= info
->stream
;
49 const moxie_opc_info_t
* opcode
;
52 fpr
= info
->fprintf_func
;
54 if ((status
= info
->read_memory_func (addr
, buffer
, 2, info
)))
56 iword
= bfd_getb16 (buffer
);
58 /* Form 1 instructions have the high bit set to 0. */
59 if ((iword
& (1<<15)) == 0)
61 /* Extract the Form 1 opcode. */
62 opcode
= &moxie_form1_opc_info
[iword
>> 8];
63 switch (opcode
->itype
)
66 fpr (stream
, "%s", opcode
->name
);
69 fpr (stream
, "%s\t%s", opcode
->name
,
70 reg_names
[OP_A(iword
)]);
73 fpr (stream
, "%s\t%s, %s", opcode
->name
,
74 reg_names
[OP_A(iword
)],
75 reg_names
[OP_B(iword
)]);
80 if ((status
= info
->read_memory_func (addr
+ 2, buffer
, 4, info
)))
82 imm
= bfd_getb32 (buffer
);
83 fpr (stream
, "%s\t%s, 0x%x", opcode
->name
,
84 reg_names
[OP_A(iword
)], imm
);
91 if ((status
= info
->read_memory_func (addr
+ 2, buffer
, 4, info
)))
93 imm
= bfd_getb32 (buffer
);
94 fpr (stream
, "%s\t0x%x", opcode
->name
, imm
);
101 if ((status
= info
->read_memory_func (addr
+ 2, buffer
, 4, info
)))
103 imm
= bfd_getb32 (buffer
);
104 fpr (stream
, "%s\t", opcode
->name
);
105 info
->print_address_func ((bfd_vma
) imm
, info
);
110 fpr (stream
, "%s\t(%s), %s", opcode
->name
,
111 reg_names
[OP_A(iword
)], reg_names
[OP_B(iword
)]);
114 fpr (stream
, "%s\t%s, (%s)", opcode
->name
,
115 reg_names
[OP_A(iword
)], reg_names
[OP_B(iword
)]);
120 if ((status
= info
->read_memory_func (addr
+ 2, buffer
, 4, info
)))
122 imm
= bfd_getb32 (buffer
);
123 fpr (stream
, "%s\t0x%x, %s",
124 opcode
->name
, imm
, reg_names
[OP_A(iword
)]);
131 if ((status
= info
->read_memory_func (addr
+2, buffer
, 4, info
)))
133 imm
= bfd_getb32 (buffer
);
134 fpr (stream
, "%s\t0x%x(%s), %s", opcode
->name
,
136 reg_names
[OP_A(iword
)],
137 reg_names
[OP_B(iword
)]);
144 if ((status
= info
->read_memory_func (addr
+2, buffer
, 4, info
)))
146 imm
= bfd_getb32 (buffer
);
147 fpr (stream
, "%s\t%s, 0x%x(%s)",
149 reg_names
[OP_A(iword
)],
151 reg_names
[OP_B(iword
)]);
159 else if ((iword
& (1<<14)) == 0)
161 /* Extract the Form 2 opcode. */
162 opcode
= &moxie_form2_opc_info
[(iword
>> 12) & 3];
163 switch (opcode
->itype
)
166 fpr (stream
, "%s\t%s, 0x%x",
168 reg_names
[(iword
>> 8) & 0xf],
169 iword
& ((1 << 8) - 1));
172 fpr (stream
, "%s", opcode
->name
);
180 /* Extract the Form 3 opcode. */
181 opcode
= &moxie_form3_opc_info
[(iword
>> 10) & 15];
182 switch (opcode
->itype
)
185 fpr (stream
, "%s\t", opcode
->name
);
186 info
->print_address_func ((bfd_vma
) (addr
+ INST2OFFSET(iword
)),
197 info
->memory_error_func (status
, addr
, info
);
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