1 /* Disassemble moxie instructions.
2 Copyright (C) 2009-2017 Free Software Foundation, Inc.
4 This file is part of the GNU opcodes library.
6 This library is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3, or (at your option)
11 It is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
14 License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA. */
27 #include "opcode/moxie.h"
28 #include "disassemble.h"
30 static fprintf_ftype fpr
;
33 /* Macros to extract operands from the instruction word. */
34 #define OP_A(i) ((i >> 4) & 0xf)
35 #define OP_B(i) (i & 0xf)
36 #define INST2OFFSET(o) ((((signed short)((o & ((1<<10)-1))<<6))>>6)<<1)
38 static const char * reg_names
[16] =
39 { "$fp", "$sp", "$r0", "$r1", "$r2", "$r3", "$r4", "$r5",
40 "$r6", "$r7", "$r8", "$r9", "$r10", "$r11", "$r12", "$r13" };
43 print_insn_moxie (bfd_vma addr
, struct disassemble_info
* info
)
47 stream
= info
->stream
;
48 const moxie_opc_info_t
* opcode
;
51 fpr
= info
->fprintf_func
;
53 if ((status
= info
->read_memory_func (addr
, buffer
, 2, info
)))
56 if (info
->endian
== BFD_ENDIAN_BIG
)
57 iword
= bfd_getb16 (buffer
);
59 iword
= bfd_getl16 (buffer
);
61 /* Form 1 instructions have the high bit set to 0. */
62 if ((iword
& (1<<15)) == 0)
64 /* Extract the Form 1 opcode. */
65 opcode
= &moxie_form1_opc_info
[iword
>> 8];
66 switch (opcode
->itype
)
69 fpr (stream
, "%s", opcode
->name
);
72 fpr (stream
, "%s\t%s", opcode
->name
,
73 reg_names
[OP_A(iword
)]);
76 fpr (stream
, "%s\t%s, %s", opcode
->name
,
77 reg_names
[OP_A(iword
)],
78 reg_names
[OP_B(iword
)]);
83 if ((status
= info
->read_memory_func (addr
+ 2, buffer
, 4, info
)))
85 if (info
->endian
== BFD_ENDIAN_BIG
)
86 imm
= bfd_getb32 (buffer
);
88 imm
= bfd_getl32 (buffer
);
89 fpr (stream
, "%s\t%s, 0x%x", opcode
->name
,
90 reg_names
[OP_A(iword
)], imm
);
97 if ((status
= info
->read_memory_func (addr
+ 2, buffer
, 4, info
)))
99 if (info
->endian
== BFD_ENDIAN_BIG
)
100 imm
= bfd_getb32 (buffer
);
102 imm
= bfd_getl32 (buffer
);
103 fpr (stream
, "%s\t0x%x", opcode
->name
, imm
);
110 if ((status
= info
->read_memory_func (addr
+ 2, buffer
, 4, info
)))
112 if (info
->endian
== BFD_ENDIAN_BIG
)
113 imm
= bfd_getb32 (buffer
);
115 imm
= bfd_getl32 (buffer
);
116 fpr (stream
, "%s\t", opcode
->name
);
117 info
->print_address_func ((bfd_vma
) imm
, info
);
122 fpr (stream
, "%s\t(%s), %s", opcode
->name
,
123 reg_names
[OP_A(iword
)], reg_names
[OP_B(iword
)]);
126 fpr (stream
, "%s\t%s, (%s)", opcode
->name
,
127 reg_names
[OP_A(iword
)], reg_names
[OP_B(iword
)]);
132 if ((status
= info
->read_memory_func (addr
+ 2, buffer
, 4, info
)))
134 if (info
->endian
== BFD_ENDIAN_BIG
)
135 imm
= bfd_getb32 (buffer
);
137 imm
= bfd_getl32 (buffer
);
138 fpr (stream
, "%s\t0x%x, %s",
139 opcode
->name
, imm
, reg_names
[OP_A(iword
)]);
146 if ((status
= info
->read_memory_func (addr
+2, buffer
, 2, info
)))
148 if (info
->endian
== BFD_ENDIAN_BIG
)
149 imm
= bfd_getb16 (buffer
);
151 imm
= bfd_getl16 (buffer
);
152 fpr (stream
, "%s\t0x%x(%s), %s", opcode
->name
,
154 reg_names
[OP_A(iword
)],
155 reg_names
[OP_B(iword
)]);
162 if ((status
= info
->read_memory_func (addr
+2, buffer
, 2, info
)))
164 if (info
->endian
== BFD_ENDIAN_BIG
)
165 imm
= bfd_getb16 (buffer
);
167 imm
= bfd_getl16 (buffer
);
168 fpr (stream
, "%s\t%s, 0x%x(%s)",
170 reg_names
[OP_A(iword
)],
172 reg_names
[OP_B(iword
)]);
183 else if ((iword
& (1<<14)) == 0)
185 /* Extract the Form 2 opcode. */
186 opcode
= &moxie_form2_opc_info
[(iword
>> 12) & 3];
187 switch (opcode
->itype
)
190 fpr (stream
, "%s\t%s, 0x%x",
192 reg_names
[(iword
>> 8) & 0xf],
193 iword
& ((1 << 8) - 1));
196 fpr (stream
, "%s", opcode
->name
);
207 /* Extract the Form 3 opcode. */
208 opcode
= &moxie_form3_opc_info
[(iword
>> 10) & 15];
209 switch (opcode
->itype
)
212 fpr (stream
, "%s\t", opcode
->name
);
213 info
->print_address_func ((bfd_vma
) (addr
+ INST2OFFSET(iword
) + 2),
227 info
->memory_error_func (status
, addr
, info
);
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