Annotation of src/external/gpl3/binutils.old/dist/opcodes/spu-dis.c, Revision 1.1.1.5
1.1 christos 1: /* Disassemble SPU instructions
2:
1.1.1.5 ! christos 3: Copyright (C) 2006-2020 Free Software Foundation, Inc.
1.1 christos 4:
5: This file is part of the GNU opcodes library.
6:
7: This library 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 3, or (at your option)
10: any later version.
11:
12: It is distributed in the hope that it will be useful, but WITHOUT
13: ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14: or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15: License for more details.
16:
17: You should have received a copy of the GNU General Public License
18: along with this file; see the file COPYING. If not, write to the
19: Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston,
20: MA 02110-1301, USA. */
21:
22: #include "sysdep.h"
23: #include <stdio.h>
1.1.1.4 christos 24: #include "disassemble.h"
1.1 christos 25: #include "opcode/spu.h"
26:
27: /* This file provides a disassembler function which uses
28: the disassembler interface defined in dis-asm.h. */
29:
30: extern const struct spu_opcode spu_opcodes[];
31: extern const int spu_num_opcodes;
32:
33: static const struct spu_opcode *spu_disassemble_table[(1<<11)];
34:
35: static void
36: init_spu_disassemble (void)
37: {
38: int i;
39:
40: /* If two instructions have the same opcode then we prefer the first
41: * one. In most cases it is just an alternate mnemonic. */
42: for (i = 0; i < spu_num_opcodes; i++)
43: {
44: int o = spu_opcodes[i].opcode;
45: if (o >= (1 << 11))
46: abort ();
47: if (spu_disassemble_table[o] == 0)
48: spu_disassemble_table[o] = &spu_opcodes[i];
49: }
50: }
51:
52: /* Determine the instruction from the 10 least significant bits. */
53: static const struct spu_opcode *
54: get_index_for_opcode (unsigned int insn)
55: {
56: const struct spu_opcode *op_index;
57: unsigned int opcode = insn >> (32-11);
58:
59: /* Init the table. This assumes that element 0/opcode 0 (currently
60: * NOP) is always used */
61: if (spu_disassemble_table[0] == 0)
62: init_spu_disassemble ();
63:
64: if ((op_index = spu_disassemble_table[opcode & 0x780]) != 0
65: && op_index->insn_type == RRR)
66: return op_index;
67:
68: if ((op_index = spu_disassemble_table[opcode & 0x7f0]) != 0
69: && (op_index->insn_type == RI18 || op_index->insn_type == LBT))
70: return op_index;
71:
72: if ((op_index = spu_disassemble_table[opcode & 0x7f8]) != 0
73: && op_index->insn_type == RI10)
74: return op_index;
75:
76: if ((op_index = spu_disassemble_table[opcode & 0x7fc]) != 0
77: && (op_index->insn_type == RI16))
78: return op_index;
79:
80: if ((op_index = spu_disassemble_table[opcode & 0x7fe]) != 0
81: && (op_index->insn_type == RI8))
82: return op_index;
83:
84: if ((op_index = spu_disassemble_table[opcode & 0x7ff]) != 0)
85: return op_index;
86:
87: return 0;
88: }
89:
90: /* Print a Spu instruction. */
91:
92: int
93: print_insn_spu (bfd_vma memaddr, struct disassemble_info *info)
94: {
95: bfd_byte buffer[4];
96: int value;
97: int hex_value;
98: int status;
99: unsigned int insn;
100: const struct spu_opcode *op_index;
101: enum spu_insns tag;
102:
103: status = (*info->read_memory_func) (memaddr, buffer, 4, info);
104: if (status != 0)
105: {
106: (*info->memory_error_func) (status, memaddr, info);
107: return -1;
108: }
109:
110: insn = bfd_getb32 (buffer);
111:
112: op_index = get_index_for_opcode (insn);
113:
114: if (op_index == 0)
115: {
116: (*info->fprintf_func) (info->stream, ".long 0x%x", insn);
117: }
118: else
119: {
120: int i;
121: int paren = 0;
122: tag = (enum spu_insns)(op_index - spu_opcodes);
123: (*info->fprintf_func) (info->stream, "%s", op_index->mnemonic);
124: if (tag == M_BI || tag == M_BISL || tag == M_IRET || tag == M_BISLED
125: || tag == M_BIHNZ || tag == M_BIHZ || tag == M_BINZ || tag == M_BIZ
126: || tag == M_SYNC || tag == M_HBR)
127: {
128: int fb = (insn >> (32-18)) & 0x7f;
129: if (fb & 0x40)
130: (*info->fprintf_func) (info->stream, tag == M_SYNC ? "c" : "p");
131: if (fb & 0x20)
132: (*info->fprintf_func) (info->stream, "d");
133: if (fb & 0x10)
134: (*info->fprintf_func) (info->stream, "e");
135: }
136: if (op_index->arg[0] != 0)
137: (*info->fprintf_func) (info->stream, "\t");
138: hex_value = 0;
139: for (i = 1; i <= op_index->arg[0]; i++)
140: {
141: int arg = op_index->arg[i];
142: if (arg != A_P && !paren && i > 1)
143: (*info->fprintf_func) (info->stream, ",");
144:
145: switch (arg)
146: {
147: case A_T:
148: (*info->fprintf_func) (info->stream, "$%d",
149: DECODE_INSN_RT (insn));
150: break;
151: case A_A:
152: (*info->fprintf_func) (info->stream, "$%d",
153: DECODE_INSN_RA (insn));
154: break;
155: case A_B:
156: (*info->fprintf_func) (info->stream, "$%d",
157: DECODE_INSN_RB (insn));
158: break;
159: case A_C:
160: (*info->fprintf_func) (info->stream, "$%d",
161: DECODE_INSN_RC (insn));
162: break;
163: case A_S:
164: (*info->fprintf_func) (info->stream, "$sp%d",
165: DECODE_INSN_RA (insn));
166: break;
167: case A_H:
168: (*info->fprintf_func) (info->stream, "$ch%d",
169: DECODE_INSN_RA (insn));
170: break;
171: case A_P:
172: paren++;
173: (*info->fprintf_func) (info->stream, "(");
174: break;
175: case A_U7A:
176: (*info->fprintf_func) (info->stream, "%d",
177: 173 - DECODE_INSN_U8 (insn));
178: break;
179: case A_U7B:
180: (*info->fprintf_func) (info->stream, "%d",
181: 155 - DECODE_INSN_U8 (insn));
182: break;
183: case A_S3:
184: case A_S6:
185: case A_S7:
186: case A_S7N:
187: case A_U3:
188: case A_U5:
189: case A_U6:
190: case A_U7:
191: hex_value = DECODE_INSN_I7 (insn);
192: (*info->fprintf_func) (info->stream, "%d", hex_value);
193: break;
194: case A_S11:
195: (*info->print_address_func) (memaddr + DECODE_INSN_I9a (insn) * 4,
196: info);
197: break;
198: case A_S11I:
199: (*info->print_address_func) (memaddr + DECODE_INSN_I9b (insn) * 4,
200: info);
201: break;
202: case A_S10:
203: case A_S10B:
204: hex_value = DECODE_INSN_I10 (insn);
205: (*info->fprintf_func) (info->stream, "%d", hex_value);
206: break;
207: case A_S14:
208: hex_value = DECODE_INSN_I10 (insn) * 16;
209: (*info->fprintf_func) (info->stream, "%d", hex_value);
210: break;
211: case A_S16:
212: hex_value = DECODE_INSN_I16 (insn);
213: (*info->fprintf_func) (info->stream, "%d", hex_value);
214: break;
215: case A_X16:
216: hex_value = DECODE_INSN_U16 (insn);
217: (*info->fprintf_func) (info->stream, "%u", hex_value);
218: break;
219: case A_R18:
220: value = DECODE_INSN_I16 (insn) * 4;
221: if (value == 0)
222: (*info->fprintf_func) (info->stream, "%d", value);
223: else
224: {
225: hex_value = memaddr + value;
226: (*info->print_address_func) (hex_value & 0x3ffff, info);
227: }
228: break;
229: case A_S18:
230: value = DECODE_INSN_U16 (insn) * 4;
231: if (value == 0)
232: (*info->fprintf_func) (info->stream, "%d", value);
233: else
234: (*info->print_address_func) (value, info);
235: break;
236: case A_U18:
237: value = DECODE_INSN_U18 (insn);
238: if (value == 0 || !(*info->symbol_at_address_func)(0, info))
239: {
240: hex_value = value;
241: (*info->fprintf_func) (info->stream, "%u", value);
242: }
243: else
244: (*info->print_address_func) (value, info);
245: break;
246: case A_U14:
247: hex_value = DECODE_INSN_U14 (insn);
248: (*info->fprintf_func) (info->stream, "%u", hex_value);
249: break;
250: }
251: if (arg != A_P && paren)
252: {
253: (*info->fprintf_func) (info->stream, ")");
254: paren--;
255: }
256: }
257: if (hex_value > 16)
258: (*info->fprintf_func) (info->stream, "\t# %x", hex_value);
259: }
260: return 4;
261: }
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