Commit | Line | Data |
---|---|---|
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> |
b92a226e | 23 | #include <asm/cpu_has_feature.h> |
1da177e4 LT |
24 | #include "nonstdio.h" |
25 | #include "ansidecl.h" | |
26 | #include "ppc.h" | |
e0426047 | 27 | #include "dis-asm.h" |
1da177e4 LT |
28 | |
29 | /* Print a PowerPC or POWER instruction. */ | |
30 | ||
31 | int | |
4c4c8723 | 32 | print_insn_powerpc (unsigned long insn, unsigned long memaddr) |
1da177e4 LT |
33 | { |
34 | const struct powerpc_opcode *opcode; | |
35 | const struct powerpc_opcode *opcode_end; | |
36 | unsigned long op; | |
4c4c8723 | 37 | int dialect; |
1da177e4 | 38 | |
4c4c8723 | 39 | dialect = PPC_OPCODE_PPC | PPC_OPCODE_CLASSIC | PPC_OPCODE_COMMON |
1da177e4 LT |
40 | | PPC_OPCODE_64 | PPC_OPCODE_POWER4 | PPC_OPCODE_ALTIVEC; |
41 | ||
897f112b ME |
42 | if (cpu_has_feature(CPU_FTRS_POWER5)) |
43 | dialect |= PPC_OPCODE_POWER5; | |
44 | ||
45 | if (cpu_has_feature(CPU_FTRS_CELL)) | |
46 | dialect |= PPC_OPCODE_CELL | PPC_OPCODE_ALTIVEC; | |
47 | ||
48 | if (cpu_has_feature(CPU_FTRS_POWER6)) | |
49 | dialect |= PPC_OPCODE_POWER5 | PPC_OPCODE_POWER6 | PPC_OPCODE_ALTIVEC; | |
50 | ||
1da177e4 LT |
51 | /* Get the major opcode of the instruction. */ |
52 | op = PPC_OP (insn); | |
53 | ||
54 | /* Find the first match in the opcode table. We could speed this up | |
55 | a bit by doing a binary search on the major opcode. */ | |
56 | opcode_end = powerpc_opcodes + powerpc_num_opcodes; | |
57 | again: | |
58 | for (opcode = powerpc_opcodes; opcode < opcode_end; opcode++) | |
59 | { | |
60 | unsigned long table_op; | |
61 | const unsigned char *opindex; | |
62 | const struct powerpc_operand *operand; | |
63 | int invalid; | |
64 | int need_comma; | |
65 | int need_paren; | |
66 | ||
67 | table_op = PPC_OP (opcode->opcode); | |
68 | if (op < table_op) | |
69 | break; | |
70 | if (op > table_op) | |
71 | continue; | |
72 | ||
73 | if ((insn & opcode->mask) != opcode->opcode | |
74 | || (opcode->flags & dialect) == 0) | |
75 | continue; | |
76 | ||
77 | /* Make two passes over the operands. First see if any of them | |
78 | have extraction functions, and, if they do, make sure the | |
79 | instruction is valid. */ | |
80 | invalid = 0; | |
81 | for (opindex = opcode->operands; *opindex != 0; opindex++) | |
82 | { | |
83 | operand = powerpc_operands + *opindex; | |
84 | if (operand->extract) | |
85 | (*operand->extract) (insn, dialect, &invalid); | |
86 | } | |
87 | if (invalid) | |
88 | continue; | |
89 | ||
90 | /* The instruction is valid. */ | |
91 | printf("%s", opcode->name); | |
92 | if (opcode->operands[0] != 0) | |
93 | printf("\t"); | |
94 | ||
95 | /* Now extract and print the operands. */ | |
96 | need_comma = 0; | |
97 | need_paren = 0; | |
98 | for (opindex = opcode->operands; *opindex != 0; opindex++) | |
99 | { | |
100 | long value; | |
101 | ||
102 | operand = powerpc_operands + *opindex; | |
103 | ||
104 | /* Operands that are marked FAKE are simply ignored. We | |
105 | already made sure that the extract function considered | |
106 | the instruction to be valid. */ | |
107 | if ((operand->flags & PPC_OPERAND_FAKE) != 0) | |
108 | continue; | |
109 | ||
110 | /* Extract the value from the instruction. */ | |
111 | if (operand->extract) | |
112 | value = (*operand->extract) (insn, dialect, &invalid); | |
113 | else | |
114 | { | |
115 | value = (insn >> operand->shift) & ((1 << operand->bits) - 1); | |
116 | if ((operand->flags & PPC_OPERAND_SIGNED) != 0 | |
117 | && (value & (1 << (operand->bits - 1))) != 0) | |
118 | value -= 1 << operand->bits; | |
119 | } | |
120 | ||
121 | /* If the operand is optional, and the value is zero, don't | |
122 | print anything. */ | |
123 | if ((operand->flags & PPC_OPERAND_OPTIONAL) != 0 | |
124 | && (operand->flags & PPC_OPERAND_NEXT) == 0 | |
125 | && value == 0) | |
126 | continue; | |
127 | ||
128 | if (need_comma) | |
129 | { | |
130 | printf(","); | |
131 | need_comma = 0; | |
132 | } | |
133 | ||
134 | /* Print the operand as directed by the flags. */ | |
897f112b ME |
135 | if ((operand->flags & PPC_OPERAND_GPR) != 0 |
136 | || ((operand->flags & PPC_OPERAND_GPR_0) != 0 && value != 0)) | |
1da177e4 LT |
137 | printf("r%ld", value); |
138 | else if ((operand->flags & PPC_OPERAND_FPR) != 0) | |
139 | printf("f%ld", value); | |
140 | else if ((operand->flags & PPC_OPERAND_VR) != 0) | |
141 | printf("v%ld", value); | |
142 | else if ((operand->flags & PPC_OPERAND_RELATIVE) != 0) | |
143 | print_address (memaddr + value); | |
144 | else if ((operand->flags & PPC_OPERAND_ABSOLUTE) != 0) | |
145 | print_address (value & 0xffffffff); | |
146 | else if ((operand->flags & PPC_OPERAND_CR) == 0 | |
147 | || (dialect & PPC_OPCODE_PPC) == 0) | |
148 | printf("%ld", value); | |
149 | else | |
150 | { | |
151 | if (operand->bits == 3) | |
897f112b | 152 | printf("cr%ld", value); |
1da177e4 LT |
153 | else |
154 | { | |
155 | static const char *cbnames[4] = { "lt", "gt", "eq", "so" }; | |
156 | int cr; | |
157 | int cc; | |
158 | ||
159 | cr = value >> 2; | |
160 | if (cr != 0) | |
161 | printf("4*cr%d+", cr); | |
162 | cc = value & 3; | |
163 | printf("%s", cbnames[cc]); | |
164 | } | |
165 | } | |
166 | ||
167 | if (need_paren) | |
168 | { | |
169 | printf(")"); | |
170 | need_paren = 0; | |
171 | } | |
172 | ||
173 | if ((operand->flags & PPC_OPERAND_PARENS) == 0) | |
174 | need_comma = 1; | |
175 | else | |
176 | { | |
177 | printf("("); | |
178 | need_paren = 1; | |
179 | } | |
180 | } | |
181 | ||
182 | /* We have found and printed an instruction; return. */ | |
183 | return 4; | |
184 | } | |
185 | ||
186 | if ((dialect & PPC_OPCODE_ANY) != 0) | |
187 | { | |
188 | dialect = ~PPC_OPCODE_ANY; | |
189 | goto again; | |
190 | } | |
191 | ||
192 | /* We could not find a match. */ | |
193 | printf(".long 0x%lx", insn); | |
194 | ||
195 | return 4; | |
196 | } |