1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* Disassemble SPU instructions
4 Copyright 2006 Free Software Foundation, Inc.
6 This file is part of GDB, GAS, and the GNU binutils.
10 #include <linux/string.h>
16 /* This file provides a disassembler function which uses
17 the disassembler interface defined in dis-asm.h. */
19 extern const struct spu_opcode spu_opcodes[];
20 extern const int spu_num_opcodes;
22 #define SPU_DISASM_TBL_SIZE (1 << 11)
23 static const struct spu_opcode *spu_disassemble_table[SPU_DISASM_TBL_SIZE];
26 init_spu_disassemble (void)
30 /* If two instructions have the same opcode then we prefer the first
31 * one. In most cases it is just an alternate mnemonic. */
32 for (i = 0; i < spu_num_opcodes; i++)
34 int o = spu_opcodes[i].opcode;
35 if (o >= SPU_DISASM_TBL_SIZE)
36 continue; /* abort (); */
37 if (spu_disassemble_table[o] == 0)
38 spu_disassemble_table[o] = &spu_opcodes[i];
42 /* Determine the instruction from the 10 least significant bits. */
43 static const struct spu_opcode *
44 get_index_for_opcode (unsigned int insn)
46 const struct spu_opcode *index;
47 unsigned int opcode = insn >> (32-11);
49 /* Init the table. This assumes that element 0/opcode 0 (currently
50 * NOP) is always used */
51 if (spu_disassemble_table[0] == 0)
52 init_spu_disassemble ();
54 if ((index = spu_disassemble_table[opcode & 0x780]) != 0
55 && index->insn_type == RRR)
58 if ((index = spu_disassemble_table[opcode & 0x7f0]) != 0
59 && (index->insn_type == RI18 || index->insn_type == LBT))
62 if ((index = spu_disassemble_table[opcode & 0x7f8]) != 0
63 && index->insn_type == RI10)
66 if ((index = spu_disassemble_table[opcode & 0x7fc]) != 0
67 && (index->insn_type == RI16))
70 if ((index = spu_disassemble_table[opcode & 0x7fe]) != 0
71 && (index->insn_type == RI8))
74 if ((index = spu_disassemble_table[opcode & 0x7ff]) != 0)
80 /* Print a Spu instruction. */
83 print_insn_spu (unsigned long insn, unsigned long memaddr)
87 const struct spu_opcode *index;
90 index = get_index_for_opcode (insn);
94 printf(".long 0x%lx", insn);
100 tag = (enum spu_insns)(index - spu_opcodes);
101 printf("%s", index->mnemonic);
102 if (tag == M_BI || tag == M_BISL || tag == M_IRET || tag == M_BISLED
103 || tag == M_BIHNZ || tag == M_BIHZ || tag == M_BINZ || tag == M_BIZ
104 || tag == M_SYNC || tag == M_HBR)
106 int fb = (insn >> (32-18)) & 0x7f;
108 printf(tag == M_SYNC ? "c" : "p");
114 if (index->arg[0] != 0)
117 for (i = 1; i <= index->arg[0]; i++)
119 int arg = index->arg[i];
120 if (arg != A_P && !paren && i > 1)
127 DECODE_INSN_RT (insn));
131 DECODE_INSN_RA (insn));
135 DECODE_INSN_RB (insn));
139 DECODE_INSN_RC (insn));
143 DECODE_INSN_RA (insn));
147 DECODE_INSN_RA (insn));
155 173 - DECODE_INSN_U8 (insn));
159 155 - DECODE_INSN_U8 (insn));
169 hex_value = DECODE_INSN_I7 (insn);
170 printf("%d", hex_value);
173 print_address(memaddr + DECODE_INSN_I9a (insn) * 4);
176 print_address(memaddr + DECODE_INSN_I9b (insn) * 4);
180 hex_value = DECODE_INSN_I10 (insn);
181 printf("%d", hex_value);
184 hex_value = DECODE_INSN_I10 (insn) * 16;
185 printf("%d", hex_value);
188 hex_value = DECODE_INSN_I16 (insn);
189 printf("%d", hex_value);
192 hex_value = DECODE_INSN_U16 (insn);
193 printf("%u", hex_value);
196 value = DECODE_INSN_I16 (insn) * 4;
201 hex_value = memaddr + value;
202 print_address(hex_value & 0x3ffff);
206 value = DECODE_INSN_U16 (insn) * 4;
210 print_address(value);
213 value = DECODE_INSN_U18 (insn);
220 print_address(value);
223 hex_value = DECODE_INSN_U14 (insn);
224 printf("%u", hex_value);
227 if (arg != A_P && paren)
234 printf("\t# %x", hex_value);