1 /* Disassemble SPU instructions
3 Copyright 2006 Free Software Foundation, Inc.
5 This file is part of GDB, GAS, and the GNU binutils.
7 This program 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 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License along
18 with this program; if not, write to the Free Software Foundation, Inc.,
19 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
21 #include <linux/string.h>
27 /* This file provides a disassembler function which uses
28 the disassembler interface defined in dis-asm.h. */
30 extern const struct spu_opcode spu_opcodes[];
31 extern const int spu_num_opcodes;
33 #define SPU_DISASM_TBL_SIZE (1 << 11)
34 static const struct spu_opcode *spu_disassemble_table[SPU_DISASM_TBL_SIZE];
37 init_spu_disassemble (void)
41 /* If two instructions have the same opcode then we prefer the first
42 * one. In most cases it is just an alternate mnemonic. */
43 for (i = 0; i < spu_num_opcodes; i++)
45 int o = spu_opcodes[i].opcode;
46 if (o >= SPU_DISASM_TBL_SIZE)
47 continue; /* abort (); */
48 if (spu_disassemble_table[o] == 0)
49 spu_disassemble_table[o] = &spu_opcodes[i];
53 /* Determine the instruction from the 10 least significant bits. */
54 static const struct spu_opcode *
55 get_index_for_opcode (unsigned int insn)
57 const struct spu_opcode *index;
58 unsigned int opcode = insn >> (32-11);
60 /* Init the table. This assumes that element 0/opcode 0 (currently
61 * NOP) is always used */
62 if (spu_disassemble_table[0] == 0)
63 init_spu_disassemble ();
65 if ((index = spu_disassemble_table[opcode & 0x780]) != 0
66 && index->insn_type == RRR)
69 if ((index = spu_disassemble_table[opcode & 0x7f0]) != 0
70 && (index->insn_type == RI18 || index->insn_type == LBT))
73 if ((index = spu_disassemble_table[opcode & 0x7f8]) != 0
74 && index->insn_type == RI10)
77 if ((index = spu_disassemble_table[opcode & 0x7fc]) != 0
78 && (index->insn_type == RI16))
81 if ((index = spu_disassemble_table[opcode & 0x7fe]) != 0
82 && (index->insn_type == RI8))
85 if ((index = spu_disassemble_table[opcode & 0x7ff]) != 0)
91 /* Print a Spu instruction. */
94 print_insn_spu (unsigned long insn, unsigned long memaddr)
98 const struct spu_opcode *index;
101 index = get_index_for_opcode (insn);
105 printf(".long 0x%x", insn);
111 tag = (enum spu_insns)(index - spu_opcodes);
112 printf("%s", index->mnemonic);
113 if (tag == M_BI || tag == M_BISL || tag == M_IRET || tag == M_BISLED
114 || tag == M_BIHNZ || tag == M_BIHZ || tag == M_BINZ || tag == M_BIZ
115 || tag == M_SYNC || tag == M_HBR)
117 int fb = (insn >> (32-18)) & 0x7f;
119 printf(tag == M_SYNC ? "c" : "p");
125 if (index->arg[0] != 0)
128 for (i = 1; i <= index->arg[0]; i++)
130 int arg = index->arg[i];
131 if (arg != A_P && !paren && i > 1)
138 DECODE_INSN_RT (insn));
142 DECODE_INSN_RA (insn));
146 DECODE_INSN_RB (insn));
150 DECODE_INSN_RC (insn));
154 DECODE_INSN_RA (insn));
158 DECODE_INSN_RA (insn));
166 173 - DECODE_INSN_U8 (insn));
170 155 - DECODE_INSN_U8 (insn));
180 hex_value = DECODE_INSN_I7 (insn);
181 printf("%d", hex_value);
184 print_address(memaddr + DECODE_INSN_I9a (insn) * 4);
187 print_address(memaddr + DECODE_INSN_I9b (insn) * 4);
191 hex_value = DECODE_INSN_I10 (insn);
192 printf("%d", hex_value);
195 hex_value = DECODE_INSN_I10 (insn) * 16;
196 printf("%d", hex_value);
199 hex_value = DECODE_INSN_I16 (insn);
200 printf("%d", hex_value);
203 hex_value = DECODE_INSN_U16 (insn);
204 printf("%u", hex_value);
207 value = DECODE_INSN_I16 (insn) * 4;
212 hex_value = memaddr + value;
213 print_address(hex_value & 0x3ffff);
217 value = DECODE_INSN_U16 (insn) * 4;
221 print_address(value);
224 value = DECODE_INSN_U18 (insn);
231 print_address(value);
234 hex_value = DECODE_INSN_U14 (insn);
235 printf("%u", hex_value);
238 if (arg != A_P && paren)
245 printf("\t# %x", hex_value);