1 /* Disassemble moxie instructions.
2 Copyright (C) 2009-2019 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);