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>
26 extern void print_address (unsigned long memaddr);
28 /* This file provides a disassembler function which uses
29 the disassembler interface defined in dis-asm.h. */
31 extern const struct spu_opcode spu_opcodes[];
32 extern const int spu_num_opcodes;
34 #define SPU_DISASM_TBL_SIZE (1 << 11)
35 static const struct spu_opcode *spu_disassemble_table[SPU_DISASM_TBL_SIZE];
38 init_spu_disassemble (void)
42 /* If two instructions have the same opcode then we prefer the first
43 * one. In most cases it is just an alternate mnemonic. */
44 for (i = 0; i < spu_num_opcodes; i++)
46 int o = spu_opcodes[i].opcode;
47 if (o >= SPU_DISASM_TBL_SIZE)
48 continue; /* abort (); */
49 if (spu_disassemble_table[o] == 0)
50 spu_disassemble_table[o] = &spu_opcodes[i];
54 /* Determine the instruction from the 10 least significant bits. */
55 static const struct spu_opcode *
56 get_index_for_opcode (unsigned int insn)
58 const struct spu_opcode *index;
59 unsigned int opcode = insn >> (32-11);
61 /* Init the table. This assumes that element 0/opcode 0 (currently
62 * NOP) is always used */
63 if (spu_disassemble_table[0] == 0)
64 init_spu_disassemble ();
66 if ((index = spu_disassemble_table[opcode & 0x780]) != 0
67 && index->insn_type == RRR)
70 if ((index = spu_disassemble_table[opcode & 0x7f0]) != 0
71 && (index->insn_type == RI18 || index->insn_type == LBT))
74 if ((index = spu_disassemble_table[opcode & 0x7f8]) != 0
75 && index->insn_type == RI10)
78 if ((index = spu_disassemble_table[opcode & 0x7fc]) != 0
79 && (index->insn_type == RI16))
82 if ((index = spu_disassemble_table[opcode & 0x7fe]) != 0
83 && (index->insn_type == RI8))
86 if ((index = spu_disassemble_table[opcode & 0x7ff]) != 0)
92 /* Print a Spu instruction. */
95 print_insn_spu (unsigned long insn, unsigned long memaddr)
99 const struct spu_opcode *index;
102 index = get_index_for_opcode (insn);
106 printf(".long 0x%x", insn);
112 tag = (enum spu_insns)(index - spu_opcodes);
113 printf("%s", index->mnemonic);
114 if (tag == M_BI || tag == M_BISL || tag == M_IRET || tag == M_BISLED
115 || tag == M_BIHNZ || tag == M_BIHZ || tag == M_BINZ || tag == M_BIZ
116 || tag == M_SYNC || tag == M_HBR)
118 int fb = (insn >> (32-18)) & 0x7f;
120 printf(tag == M_SYNC ? "c" : "p");
126 if (index->arg[0] != 0)
129 for (i = 1; i <= index->arg[0]; i++)
131 int arg = index->arg[i];
132 if (arg != A_P && !paren && i > 1)
139 DECODE_INSN_RT (insn));
143 DECODE_INSN_RA (insn));
147 DECODE_INSN_RB (insn));
151 DECODE_INSN_RC (insn));
155 DECODE_INSN_RA (insn));
159 DECODE_INSN_RA (insn));
167 173 - DECODE_INSN_U8 (insn));
171 155 - DECODE_INSN_U8 (insn));
181 hex_value = DECODE_INSN_I7 (insn);
182 printf("%d", hex_value);
185 print_address(memaddr + DECODE_INSN_I9a (insn) * 4);
188 print_address(memaddr + DECODE_INSN_I9b (insn) * 4);
192 hex_value = DECODE_INSN_I10 (insn);
193 printf("%d", hex_value);
196 hex_value = DECODE_INSN_I10 (insn) * 16;
197 printf("%d", hex_value);
200 hex_value = DECODE_INSN_I16 (insn);
201 printf("%d", hex_value);
204 hex_value = DECODE_INSN_U16 (insn);
205 printf("%u", hex_value);
208 value = DECODE_INSN_I16 (insn) * 4;
213 hex_value = memaddr + value;
214 print_address(hex_value & 0x3ffff);
218 value = DECODE_INSN_U16 (insn) * 4;
222 print_address(value);
225 value = DECODE_INSN_U18 (insn);
232 print_address(value);
235 hex_value = DECODE_INSN_U14 (insn);
236 printf("%u", hex_value);
239 if (arg != A_P && paren)
246 printf("\t# %x", hex_value);