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-rw-r--r--arch/powerpc/xmon/spu-dis.c249
1 files changed, 249 insertions, 0 deletions
diff --git a/arch/powerpc/xmon/spu-dis.c b/arch/powerpc/xmon/spu-dis.c
new file mode 100644
index 000000000000..75ac0815f1a4
--- /dev/null
+++ b/arch/powerpc/xmon/spu-dis.c
@@ -0,0 +1,249 @@
1/* Disassemble SPU instructions
2
3 Copyright 2006 Free Software Foundation, Inc.
4
5 This file is part of GDB, GAS, and the GNU binutils.
6
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.
11
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.
16
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. */
20
21#include <linux/string.h>
22#include "nonstdio.h"
23#include "ansidecl.h"
24#include "spu.h"
25
26extern void print_address (unsigned long memaddr);
27
28/* This file provides a disassembler function which uses
29 the disassembler interface defined in dis-asm.h. */
30
31extern const struct spu_opcode spu_opcodes[];
32extern const int spu_num_opcodes;
33
34#define SPU_DISASM_TBL_SIZE (1 << 11)
35static const struct spu_opcode *spu_disassemble_table[SPU_DISASM_TBL_SIZE];
36
37static void
38init_spu_disassemble (void)
39{
40 int i;
41
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++)
45 {
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];
51 }
52}
53
54/* Determine the instruction from the 10 least significant bits. */
55static const struct spu_opcode *
56get_index_for_opcode (unsigned int insn)
57{
58 const struct spu_opcode *index;
59 unsigned int opcode = insn >> (32-11);
60
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 ();
65
66 if ((index = spu_disassemble_table[opcode & 0x780]) != 0
67 && index->insn_type == RRR)
68 return index;
69
70 if ((index = spu_disassemble_table[opcode & 0x7f0]) != 0
71 && (index->insn_type == RI18 || index->insn_type == LBT))
72 return index;
73
74 if ((index = spu_disassemble_table[opcode & 0x7f8]) != 0
75 && index->insn_type == RI10)
76 return index;
77
78 if ((index = spu_disassemble_table[opcode & 0x7fc]) != 0
79 && (index->insn_type == RI16))
80 return index;
81
82 if ((index = spu_disassemble_table[opcode & 0x7fe]) != 0
83 && (index->insn_type == RI8))
84 return index;
85
86 if ((index = spu_disassemble_table[opcode & 0x7ff]) != 0)
87 return index;
88
89 return 0;
90}
91
92/* Print a Spu instruction. */
93
94int
95print_insn_spu (unsigned long insn, unsigned long memaddr)
96{
97 int value;
98 int hex_value;
99 const struct spu_opcode *index;
100 enum spu_insns tag;
101
102 index = get_index_for_opcode (insn);
103
104 if (index == 0)
105 {
106 printf(".long 0x%x", insn);
107 }
108 else
109 {
110 int i;
111 int paren = 0;
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)
117 {
118 int fb = (insn >> (32-18)) & 0x7f;
119 if (fb & 0x40)
120 printf(tag == M_SYNC ? "c" : "p");
121 if (fb & 0x20)
122 printf("d");
123 if (fb & 0x10)
124 printf("e");
125 }
126 if (index->arg[0] != 0)
127 printf("\t");
128 hex_value = 0;
129 for (i = 1; i <= index->arg[0]; i++)
130 {
131 int arg = index->arg[i];
132 if (arg != A_P && !paren && i > 1)
133 printf(",");
134
135 switch (arg)
136 {
137 case A_T:
138 printf("$%d",
139 DECODE_INSN_RT (insn));
140 break;
141 case A_A:
142 printf("$%d",
143 DECODE_INSN_RA (insn));
144 break;
145 case A_B:
146 printf("$%d",
147 DECODE_INSN_RB (insn));
148 break;
149 case A_C:
150 printf("$%d",
151 DECODE_INSN_RC (insn));
152 break;
153 case A_S:
154 printf("$sp%d",
155 DECODE_INSN_RA (insn));
156 break;
157 case A_H:
158 printf("$ch%d",
159 DECODE_INSN_RA (insn));
160 break;
161 case A_P:
162 paren++;
163 printf("(");
164 break;
165 case A_U7A:
166 printf("%d",
167 173 - DECODE_INSN_U8 (insn));
168 break;
169 case A_U7B:
170 printf("%d",
171 155 - DECODE_INSN_U8 (insn));
172 break;
173 case A_S3:
174 case A_S6:
175 case A_S7:
176 case A_S7N:
177 case A_U3:
178 case A_U5:
179 case A_U6:
180 case A_U7:
181 hex_value = DECODE_INSN_I7 (insn);
182 printf("%d", hex_value);
183 break;
184 case A_S11:
185 print_address(memaddr + DECODE_INSN_I9a (insn) * 4);
186 break;
187 case A_S11I:
188 print_address(memaddr + DECODE_INSN_I9b (insn) * 4);
189 break;
190 case A_S10:
191 case A_S10B:
192 hex_value = DECODE_INSN_I10 (insn);
193 printf("%d", hex_value);
194 break;
195 case A_S14:
196 hex_value = DECODE_INSN_I10 (insn) * 16;
197 printf("%d", hex_value);
198 break;
199 case A_S16:
200 hex_value = DECODE_INSN_I16 (insn);
201 printf("%d", hex_value);
202 break;
203 case A_X16:
204 hex_value = DECODE_INSN_U16 (insn);
205 printf("%u", hex_value);
206 break;
207 case A_R18:
208 value = DECODE_INSN_I16 (insn) * 4;
209 if (value == 0)
210 printf("%d", value);
211 else
212 {
213 hex_value = memaddr + value;
214 print_address(hex_value & 0x3ffff);
215 }
216 break;
217 case A_S18:
218 value = DECODE_INSN_U16 (insn) * 4;
219 if (value == 0)
220 printf("%d", value);
221 else
222 print_address(value);
223 break;
224 case A_U18:
225 value = DECODE_INSN_U18 (insn);
226 if (value == 0 || 1)
227 {
228 hex_value = value;
229 printf("%u", value);
230 }
231 else
232 print_address(value);
233 break;
234 case A_U14:
235 hex_value = DECODE_INSN_U14 (insn);
236 printf("%u", hex_value);
237 break;
238 }
239 if (arg != A_P && paren)
240 {
241 printf(")");
242 paren--;
243 }
244 }
245 if (hex_value > 16)
246 printf("\t# %x", hex_value);
247 }
248 return 4;
249}
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