diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/ppc/xmon/ppc.h |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/ppc/xmon/ppc.h')
-rw-r--r-- | arch/ppc/xmon/ppc.h | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/arch/ppc/xmon/ppc.h b/arch/ppc/xmon/ppc.h new file mode 100644 index 000000000000..2345ecba1fe9 --- /dev/null +++ b/arch/ppc/xmon/ppc.h | |||
@@ -0,0 +1,240 @@ | |||
1 | /* ppc.h -- Header file for PowerPC opcode table | ||
2 | Copyright 1994 Free Software Foundation, Inc. | ||
3 | Written by Ian Lance Taylor, Cygnus Support | ||
4 | |||
5 | This file is part of GDB, GAS, and the GNU binutils. | ||
6 | |||
7 | GDB, GAS, and the GNU binutils are free software; you can redistribute | ||
8 | them and/or modify them under the terms of the GNU General Public | ||
9 | License as published by the Free Software Foundation; either version | ||
10 | 1, or (at your option) any later version. | ||
11 | |||
12 | GDB, GAS, and the GNU binutils are distributed in the hope that they | ||
13 | will be useful, but WITHOUT ANY WARRANTY; without even the implied | ||
14 | warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | ||
15 | the GNU General Public 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 Free | ||
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | ||
20 | |||
21 | #ifndef PPC_H | ||
22 | #define PPC_H | ||
23 | |||
24 | /* The opcode table is an array of struct powerpc_opcode. */ | ||
25 | |||
26 | struct powerpc_opcode | ||
27 | { | ||
28 | /* The opcode name. */ | ||
29 | const char *name; | ||
30 | |||
31 | /* The opcode itself. Those bits which will be filled in with | ||
32 | operands are zeroes. */ | ||
33 | unsigned long opcode; | ||
34 | |||
35 | /* The opcode mask. This is used by the disassembler. This is a | ||
36 | mask containing ones indicating those bits which must match the | ||
37 | opcode field, and zeroes indicating those bits which need not | ||
38 | match (and are presumably filled in by operands). */ | ||
39 | unsigned long mask; | ||
40 | |||
41 | /* One bit flags for the opcode. These are used to indicate which | ||
42 | specific processors support the instructions. The defined values | ||
43 | are listed below. */ | ||
44 | unsigned long flags; | ||
45 | |||
46 | /* An array of operand codes. Each code is an index into the | ||
47 | operand table. They appear in the order which the operands must | ||
48 | appear in assembly code, and are terminated by a zero. */ | ||
49 | unsigned char operands[8]; | ||
50 | }; | ||
51 | |||
52 | /* The table itself is sorted by major opcode number, and is otherwise | ||
53 | in the order in which the disassembler should consider | ||
54 | instructions. */ | ||
55 | extern const struct powerpc_opcode powerpc_opcodes[]; | ||
56 | extern const int powerpc_num_opcodes; | ||
57 | |||
58 | /* Values defined for the flags field of a struct powerpc_opcode. */ | ||
59 | |||
60 | /* Opcode is defined for the PowerPC architecture. */ | ||
61 | #define PPC_OPCODE_PPC (01) | ||
62 | |||
63 | /* Opcode is defined for the POWER (RS/6000) architecture. */ | ||
64 | #define PPC_OPCODE_POWER (02) | ||
65 | |||
66 | /* Opcode is defined for the POWER2 (Rios 2) architecture. */ | ||
67 | #define PPC_OPCODE_POWER2 (04) | ||
68 | |||
69 | /* Opcode is only defined on 32 bit architectures. */ | ||
70 | #define PPC_OPCODE_32 (010) | ||
71 | |||
72 | /* Opcode is only defined on 64 bit architectures. */ | ||
73 | #define PPC_OPCODE_64 (020) | ||
74 | |||
75 | /* Opcode is supported by the Motorola PowerPC 601 processor. The 601 | ||
76 | is assumed to support all PowerPC (PPC_OPCODE_PPC) instructions, | ||
77 | but it also supports many additional POWER instructions. */ | ||
78 | #define PPC_OPCODE_601 (040) | ||
79 | |||
80 | /* A macro to extract the major opcode from an instruction. */ | ||
81 | #define PPC_OP(i) (((i) >> 26) & 0x3f) | ||
82 | |||
83 | /* The operands table is an array of struct powerpc_operand. */ | ||
84 | |||
85 | struct powerpc_operand | ||
86 | { | ||
87 | /* The number of bits in the operand. */ | ||
88 | int bits; | ||
89 | |||
90 | /* How far the operand is left shifted in the instruction. */ | ||
91 | int shift; | ||
92 | |||
93 | /* Insertion function. This is used by the assembler. To insert an | ||
94 | operand value into an instruction, check this field. | ||
95 | |||
96 | If it is NULL, execute | ||
97 | i |= (op & ((1 << o->bits) - 1)) << o->shift; | ||
98 | (i is the instruction which we are filling in, o is a pointer to | ||
99 | this structure, and op is the opcode value; this assumes twos | ||
100 | complement arithmetic). | ||
101 | |||
102 | If this field is not NULL, then simply call it with the | ||
103 | instruction and the operand value. It will return the new value | ||
104 | of the instruction. If the ERRMSG argument is not NULL, then if | ||
105 | the operand value is illegal, *ERRMSG will be set to a warning | ||
106 | string (the operand will be inserted in any case). If the | ||
107 | operand value is legal, *ERRMSG will be unchanged (most operands | ||
108 | can accept any value). */ | ||
109 | unsigned long (*insert) PARAMS ((unsigned long instruction, long op, | ||
110 | const char **errmsg)); | ||
111 | |||
112 | /* Extraction function. This is used by the disassembler. To | ||
113 | extract this operand type from an instruction, check this field. | ||
114 | |||
115 | If it is NULL, compute | ||
116 | op = ((i) >> o->shift) & ((1 << o->bits) - 1); | ||
117 | if ((o->flags & PPC_OPERAND_SIGNED) != 0 | ||
118 | && (op & (1 << (o->bits - 1))) != 0) | ||
119 | op -= 1 << o->bits; | ||
120 | (i is the instruction, o is a pointer to this structure, and op | ||
121 | is the result; this assumes twos complement arithmetic). | ||
122 | |||
123 | If this field is not NULL, then simply call it with the | ||
124 | instruction value. It will return the value of the operand. If | ||
125 | the INVALID argument is not NULL, *INVALID will be set to | ||
126 | non-zero if this operand type can not actually be extracted from | ||
127 | this operand (i.e., the instruction does not match). If the | ||
128 | operand is valid, *INVALID will not be changed. */ | ||
129 | long (*extract) PARAMS ((unsigned long instruction, int *invalid)); | ||
130 | |||
131 | /* One bit syntax flags. */ | ||
132 | unsigned long flags; | ||
133 | }; | ||
134 | |||
135 | /* Elements in the table are retrieved by indexing with values from | ||
136 | the operands field of the powerpc_opcodes table. */ | ||
137 | |||
138 | extern const struct powerpc_operand powerpc_operands[]; | ||
139 | |||
140 | /* Values defined for the flags field of a struct powerpc_operand. */ | ||
141 | |||
142 | /* This operand takes signed values. */ | ||
143 | #define PPC_OPERAND_SIGNED (01) | ||
144 | |||
145 | /* This operand takes signed values, but also accepts a full positive | ||
146 | range of values when running in 32 bit mode. That is, if bits is | ||
147 | 16, it takes any value from -0x8000 to 0xffff. In 64 bit mode, | ||
148 | this flag is ignored. */ | ||
149 | #define PPC_OPERAND_SIGNOPT (02) | ||
150 | |||
151 | /* This operand does not actually exist in the assembler input. This | ||
152 | is used to support extended mnemonics such as mr, for which two | ||
153 | operands fields are identical. The assembler should call the | ||
154 | insert function with any op value. The disassembler should call | ||
155 | the extract function, ignore the return value, and check the value | ||
156 | placed in the valid argument. */ | ||
157 | #define PPC_OPERAND_FAKE (04) | ||
158 | |||
159 | /* The next operand should be wrapped in parentheses rather than | ||
160 | separated from this one by a comma. This is used for the load and | ||
161 | store instructions which want their operands to look like | ||
162 | reg,displacement(reg) | ||
163 | */ | ||
164 | #define PPC_OPERAND_PARENS (010) | ||
165 | |||
166 | /* This operand may use the symbolic names for the CR fields, which | ||
167 | are | ||
168 | lt 0 gt 1 eq 2 so 3 un 3 | ||
169 | cr0 0 cr1 1 cr2 2 cr3 3 | ||
170 | cr4 4 cr5 5 cr6 6 cr7 7 | ||
171 | These may be combined arithmetically, as in cr2*4+gt. These are | ||
172 | only supported on the PowerPC, not the POWER. */ | ||
173 | #define PPC_OPERAND_CR (020) | ||
174 | |||
175 | /* This operand names a register. The disassembler uses this to print | ||
176 | register names with a leading 'r'. */ | ||
177 | #define PPC_OPERAND_GPR (040) | ||
178 | |||
179 | /* This operand names a floating point register. The disassembler | ||
180 | prints these with a leading 'f'. */ | ||
181 | #define PPC_OPERAND_FPR (0100) | ||
182 | |||
183 | /* This operand is a relative branch displacement. The disassembler | ||
184 | prints these symbolically if possible. */ | ||
185 | #define PPC_OPERAND_RELATIVE (0200) | ||
186 | |||
187 | /* This operand is an absolute branch address. The disassembler | ||
188 | prints these symbolically if possible. */ | ||
189 | #define PPC_OPERAND_ABSOLUTE (0400) | ||
190 | |||
191 | /* This operand is optional, and is zero if omitted. This is used for | ||
192 | the optional BF and L fields in the comparison instructions. The | ||
193 | assembler must count the number of operands remaining on the line, | ||
194 | and the number of operands remaining for the opcode, and decide | ||
195 | whether this operand is present or not. The disassembler should | ||
196 | print this operand out only if it is not zero. */ | ||
197 | #define PPC_OPERAND_OPTIONAL (01000) | ||
198 | |||
199 | /* This flag is only used with PPC_OPERAND_OPTIONAL. If this operand | ||
200 | is omitted, then for the next operand use this operand value plus | ||
201 | 1, ignoring the next operand field for the opcode. This wretched | ||
202 | hack is needed because the Power rotate instructions can take | ||
203 | either 4 or 5 operands. The disassembler should print this operand | ||
204 | out regardless of the PPC_OPERAND_OPTIONAL field. */ | ||
205 | #define PPC_OPERAND_NEXT (02000) | ||
206 | |||
207 | /* This operand should be regarded as a negative number for the | ||
208 | purposes of overflow checking (i.e., the normal most negative | ||
209 | number is disallowed and one more than the normal most positive | ||
210 | number is allowed). This flag will only be set for a signed | ||
211 | operand. */ | ||
212 | #define PPC_OPERAND_NEGATIVE (04000) | ||
213 | |||
214 | /* The POWER and PowerPC assemblers use a few macros. We keep them | ||
215 | with the operands table for simplicity. The macro table is an | ||
216 | array of struct powerpc_macro. */ | ||
217 | |||
218 | struct powerpc_macro | ||
219 | { | ||
220 | /* The macro name. */ | ||
221 | const char *name; | ||
222 | |||
223 | /* The number of operands the macro takes. */ | ||
224 | unsigned int operands; | ||
225 | |||
226 | /* One bit flags for the opcode. These are used to indicate which | ||
227 | specific processors support the instructions. The values are the | ||
228 | same as those for the struct powerpc_opcode flags field. */ | ||
229 | unsigned long flags; | ||
230 | |||
231 | /* A format string to turn the macro into a normal instruction. | ||
232 | Each %N in the string is replaced with operand number N (zero | ||
233 | based). */ | ||
234 | const char *format; | ||
235 | }; | ||
236 | |||
237 | extern const struct powerpc_macro powerpc_macros[]; | ||
238 | extern const int powerpc_num_macros; | ||
239 | |||
240 | #endif /* PPC_H */ | ||