Commit | Line | Data |
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1da177e4 | 1 | /* ppc-dis.c -- Disassemble PowerPC instructions |
897f112b ME |
2 | Copyright 1994, 1995, 2000, 2001, 2002, 2003, 2004, 2005, 2006 |
3 | Free Software Foundation, Inc. | |
1da177e4 LT |
4 | Written by Ian Lance Taylor, Cygnus Support |
5 | ||
6 | This file is part of GDB, GAS, and the GNU binutils. | |
7 | ||
8 | GDB, GAS, and the GNU binutils are free software; you can redistribute | |
9 | them and/or modify them under the terms of the GNU General Public | |
10 | License as published by the Free Software Foundation; either version | |
11 | 2, or (at your option) any later version. | |
12 | ||
13 | GDB, GAS, and the GNU binutils are distributed in the hope that they | |
14 | will be useful, but WITHOUT ANY WARRANTY; without even the implied | |
15 | warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
16 | the GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this file; see the file COPYING. If not, write to the Free | |
897f112b | 20 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
1da177e4 | 21 | |
897f112b | 22 | #include <asm/cputable.h> |
1da177e4 LT |
23 | #include "nonstdio.h" |
24 | #include "ansidecl.h" | |
25 | #include "ppc.h" | |
e0426047 | 26 | #include "dis-asm.h" |
1da177e4 LT |
27 | |
28 | /* Print a PowerPC or POWER instruction. */ | |
29 | ||
30 | int | |
4c4c8723 | 31 | print_insn_powerpc (unsigned long insn, unsigned long memaddr) |
1da177e4 LT |
32 | { |
33 | const struct powerpc_opcode *opcode; | |
34 | const struct powerpc_opcode *opcode_end; | |
35 | unsigned long op; | |
4c4c8723 | 36 | int dialect; |
1da177e4 | 37 | |
4c4c8723 | 38 | dialect = PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_COMMON |
1da177e4 LT |
39 | | PPC_OPCODE_64 | PPC_OPCODE_POWER4 | PPC_OPCODE_ALTIVEC; |
40 | ||
897f112b ME |
41 | if (cpu_has_feature(CPU_FTRS_POWER5)) |
42 | dialect |= PPC_OPCODE_POWER5; | |
43 | ||
44 | if (cpu_has_feature(CPU_FTRS_CELL)) | |
45 | dialect |= PPC_OPCODE_CELL | PPC_OPCODE_ALTIVEC; | |
46 | ||
47 | if (cpu_has_feature(CPU_FTRS_POWER6)) | |
48 | dialect |= PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_ALTIVEC; | |
49 | ||
1da177e4 LT |
50 | /* Get the major opcode of the instruction. */ |
51 | op = PPC_OP (insn); | |
52 | ||
53 | /* Find the first match in the opcode table. We could speed this up | |
54 | a bit by doing a binary search on the major opcode. */ | |
55 | opcode_end = powerpc_opcodes + powerpc_num_opcodes; | |
56 | again: | |
57 | for (opcode = powerpc_opcodes; opcode < opcode_end; opcode++) | |
58 | { | |
59 | unsigned long table_op; | |
60 | const unsigned char *opindex; | |
61 | const struct powerpc_operand *operand; | |
62 | int invalid; | |
63 | int need_comma; | |
64 | int need_paren; | |
65 | ||
66 | table_op = PPC_OP (opcode->opcode); | |
67 | if (op < table_op) | |
68 | break; | |
69 | if (op > table_op) | |
70 | continue; | |
71 | ||
72 | if ((insn & opcode->mask) != opcode->opcode | |
73 | || (opcode->flags & dialect) == 0) | |
74 | continue; | |
75 | ||
76 | /* Make two passes over the operands. First see if any of them | |
77 | have extraction functions, and, if they do, make sure the | |
78 | instruction is valid. */ | |
79 | invalid = 0; | |
80 | for (opindex = opcode->operands; *opindex != 0; opindex++) | |
81 | { | |
82 | operand = powerpc_operands + *opindex; | |
83 | if (operand->extract) | |
84 | (*operand->extract) (insn, dialect, &invalid); | |
85 | } | |
86 | if (invalid) | |
87 | continue; | |
88 | ||
89 | /* The instruction is valid. */ | |
90 | printf("%s", opcode->name); | |
91 | if (opcode->operands[0] != 0) | |
92 | printf("\t"); | |
93 | ||
94 | /* Now extract and print the operands. */ | |
95 | need_comma = 0; | |
96 | need_paren = 0; | |
97 | for (opindex = opcode->operands; *opindex != 0; opindex++) | |
98 | { | |
99 | long value; | |
100 | ||
101 | operand = powerpc_operands + *opindex; | |
102 | ||
103 | /* Operands that are marked FAKE are simply ignored. We | |
104 | already made sure that the extract function considered | |
105 | the instruction to be valid. */ | |
106 | if ((operand->flags & PPC_OPERAND_FAKE) != 0) | |
107 | continue; | |
108 | ||
109 | /* Extract the value from the instruction. */ | |
110 | if (operand->extract) | |
111 | value = (*operand->extract) (insn, dialect, &invalid); | |
112 | else | |
113 | { | |
114 | value = (insn >> operand->shift) & ((1 << operand->bits) - 1); | |
115 | if ((operand->flags & PPC_OPERAND_SIGNED) != 0 | |
116 | && (value & (1 << (operand->bits - 1))) != 0) | |
117 | value -= 1 << operand->bits; | |
118 | } | |
119 | ||
120 | /* If the operand is optional, and the value is zero, don't | |
121 | print anything. */ | |
122 | if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0 | |
123 | && (operand->flags & PPC_OPERAND_NEXT) == 0 | |
124 | && value == 0) | |
125 | continue; | |
126 | ||
127 | if (need_comma) | |
128 | { | |
129 | printf(","); | |
130 | need_comma = 0; | |
131 | } | |
132 | ||
133 | /* Print the operand as directed by the flags. */ | |
897f112b ME |
134 | if ((operand->flags & PPC_OPERAND_GPR) != 0 |
135 | || ((operand->flags & PPC_OPERAND_GPR_0) != 0 && value != 0)) | |
1da177e4 LT |
136 | printf("r%ld", value); |
137 | else if ((operand->flags & PPC_OPERAND_FPR) != 0) | |
138 | printf("f%ld", value); | |
139 | else if ((operand->flags & PPC_OPERAND_VR) != 0) | |
140 | printf("v%ld", value); | |
141 | else if ((operand->flags & PPC_OPERAND_RELATIVE) != 0) | |
142 | print_address (memaddr + value); | |
143 | else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0) | |
144 | print_address (value & 0xffffffff); | |
145 | else if ((operand->flags & PPC_OPERAND_CR) == 0 | |
146 | || (dialect & PPC_OPCODE_PPC) == 0) | |
147 | printf("%ld", value); | |
148 | else | |
149 | { | |
150 | if (operand->bits == 3) | |
897f112b | 151 | printf("cr%ld", value); |
1da177e4 LT |
152 | else |
153 | { | |
154 | static const char *cbnames[4] = { "lt", "gt", "eq", "so" }; | |
155 | int cr; | |
156 | int cc; | |
157 | ||
158 | cr = value >> 2; | |
159 | if (cr != 0) | |
160 | printf("4*cr%d+", cr); | |
161 | cc = value & 3; | |
162 | printf("%s", cbnames[cc]); | |
163 | } | |
164 | } | |
165 | ||
166 | if (need_paren) | |
167 | { | |
168 | printf(")"); | |
169 | need_paren = 0; | |
170 | } | |
171 | ||
172 | if ((operand->flags & PPC_OPERAND_PARENS) == 0) | |
173 | need_comma = 1; | |
174 | else | |
175 | { | |
176 | printf("("); | |
177 | need_paren = 1; | |
178 | } | |
179 | } | |
180 | ||
181 | /* We have found and printed an instruction; return. */ | |
182 | return 4; | |
183 | } | |
184 | ||
185 | if ((dialect & PPC_OPCODE_ANY) != 0) | |
186 | { | |
187 | dialect = ~PPC_OPCODE_ANY; | |
188 | goto again; | |
189 | } | |
190 | ||
191 | /* We could not find a match. */ | |
192 | printf(".long 0x%lx", insn); | |
193 | ||
194 | return 4; | |
195 | } |