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3b16e843 NC |
1 | /* Table of opcodes for the OpenRISC 1000 ISA. |
2 | Copyright 2002 Free Software Foundation, Inc. | |
3 | Contributed by Damjan Lampret (lampret@opencores.org). | |
4 | ||
5 | This file is part of or1k_gen_isa, or1ksim, GDB and GAS. | |
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 | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | /* We treat all letters the same in encode/decode routines so | |
22 | we need to assign some characteristics to them like signess etc. */ | |
23 | ||
24 | #ifndef OR32_H_ISA | |
25 | #define OR32_H_ISA | |
26 | ||
27 | #define NUM_UNSIGNED (0) | |
28 | #define NUM_SIGNED (1) | |
29 | ||
30 | #ifndef PARAMS | |
31 | #define PARAMS(x) x | |
32 | #endif | |
33 | ||
34 | #ifndef CONST | |
35 | #define CONST const | |
36 | #endif | |
37 | ||
38 | #define MAX_GPRS 32 | |
39 | #define PAGE_SIZE 4096 | |
40 | #undef __HALF_WORD_INSN__ | |
41 | ||
42 | #define OPERAND_DELIM (',') | |
43 | ||
44 | #define OR32_IF_DELAY (1) | |
45 | #define OR32_W_FLAG (2) | |
46 | #define OR32_R_FLAG (4) | |
47 | ||
48 | struct or32_letter | |
49 | { | |
50 | char letter; | |
51 | int sign; | |
52 | /* int reloc; relocation per letter ?? */ | |
53 | }; | |
54 | ||
55 | /* Main instruction specification array. */ | |
56 | struct or32_opcode | |
57 | { | |
58 | /* Name of the instruction. */ | |
59 | char *name; | |
60 | ||
61 | /* A string of characters which describe the operands. | |
62 | Valid characters are: | |
63 | ,() Itself. Characters appears in the assembly code. | |
64 | rA Register operand. | |
65 | rB Register operand. | |
66 | rD Register operand. | |
67 | I An immediate operand, range -32768 to 32767. | |
68 | J An immediate operand, range . (unused) | |
69 | K An immediate operand, range 0 to 65535. | |
70 | L An immediate operand, range 0 to 63. | |
71 | M An immediate operand, range . (unused) | |
72 | N An immediate operand, range -33554432 to 33554431. | |
73 | O An immediate operand, range . (unused). */ | |
74 | char *args; | |
75 | ||
76 | /* Opcode and operand encoding. */ | |
77 | char *encoding; | |
78 | void (*exec) PARAMS ((void)); | |
79 | unsigned int flags; | |
80 | }; | |
81 | ||
82 | #define OPTYPE_LAST (0x80000000) | |
83 | #define OPTYPE_OP (0x40000000) | |
84 | #define OPTYPE_REG (0x20000000) | |
85 | #define OPTYPE_SIG (0x10000000) | |
86 | #define OPTYPE_DIS (0x08000000) | |
87 | #define OPTYPE_DST (0x04000000) | |
88 | #define OPTYPE_SBIT (0x00001F00) | |
89 | #define OPTYPE_SHR (0x0000001F) | |
90 | #define OPTYPE_SBIT_SHR (8) | |
91 | ||
92 | /* MM: Data how to decode operands. */ | |
93 | extern struct insn_op_struct | |
94 | { | |
95 | unsigned long type; | |
96 | unsigned long data; | |
97 | } **op_start; | |
98 | ||
99 | #ifdef HAS_EXECUTION | |
100 | extern void l_invalid PARAMS ((void)); | |
101 | extern void l_sfne PARAMS ((void)); | |
102 | extern void l_bf PARAMS ((void)); | |
103 | extern void l_add PARAMS ((void)); | |
104 | extern void l_sw PARAMS ((void)); | |
105 | extern void l_sb PARAMS ((void)); | |
106 | extern void l_sh PARAMS ((void)); | |
107 | extern void l_lwz PARAMS ((void)); | |
108 | extern void l_lbs PARAMS ((void)); | |
109 | extern void l_lbz PARAMS ((void)); | |
110 | extern void l_lhs PARAMS ((void)); | |
111 | extern void l_lhz PARAMS ((void)); | |
112 | extern void l_movhi PARAMS ((void)); | |
113 | extern void l_and PARAMS ((void)); | |
114 | extern void l_or PARAMS ((void)); | |
115 | extern void l_xor PARAMS ((void)); | |
116 | extern void l_sub PARAMS ((void)); | |
117 | extern void l_mul PARAMS ((void)); | |
118 | extern void l_div PARAMS ((void)); | |
119 | extern void l_divu PARAMS ((void)); | |
120 | extern void l_sll PARAMS ((void)); | |
121 | extern void l_sra PARAMS ((void)); | |
122 | extern void l_srl PARAMS ((void)); | |
123 | extern void l_j PARAMS ((void)); | |
124 | extern void l_jal PARAMS ((void)); | |
125 | extern void l_jalr PARAMS ((void)); | |
126 | extern void l_jr PARAMS ((void)); | |
127 | extern void l_rfe PARAMS ((void)); | |
128 | extern void l_nop PARAMS ((void)); | |
129 | extern void l_bnf PARAMS ((void)); | |
130 | extern void l_sfeq PARAMS ((void)); | |
131 | extern void l_sfgts PARAMS ((void)); | |
132 | extern void l_sfges PARAMS ((void)); | |
133 | extern void l_sflts PARAMS ((void)); | |
134 | extern void l_sfles PARAMS ((void)); | |
135 | extern void l_sfgtu PARAMS ((void)); | |
136 | extern void l_sfgeu PARAMS ((void)); | |
137 | extern void l_sfltu PARAMS ((void)); | |
138 | extern void l_sfleu PARAMS ((void)); | |
139 | extern void l_mtspr PARAMS ((void)); | |
140 | extern void l_mfspr PARAMS ((void)); | |
141 | extern void l_sys PARAMS ((void)); | |
142 | extern void l_trap PARAMS ((void)); /* CZ 21/06/01. */ | |
143 | extern void l_macrc PARAMS ((void)); | |
144 | extern void l_mac PARAMS ((void)); | |
145 | extern void l_msb PARAMS ((void)); | |
146 | extern void l_invalid PARAMS ((void)); | |
147 | extern void l_cust1 PARAMS ((void)); | |
148 | extern void l_cust2 PARAMS ((void)); | |
149 | extern void l_cust3 PARAMS ((void)); | |
150 | extern void l_cust4 PARAMS ((void)); | |
151 | #endif | |
152 | extern void l_none PARAMS ((void)); | |
153 | ||
154 | extern const struct or32_letter or32_letters[]; | |
155 | ||
156 | extern const struct or32_opcode or32_opcodes[]; | |
157 | ||
158 | extern const unsigned int or32_num_opcodes; | |
159 | ||
160 | /* Calculates instruction length in bytes. Always 4 for OR32. */ | |
161 | extern int insn_len PARAMS ((int)); | |
162 | ||
163 | /* Is individual insn's operand signed or unsigned? */ | |
164 | extern int letter_signed PARAMS ((char)); | |
165 | ||
166 | /* Number of letters in the individual lettered operand. */ | |
167 | extern int letter_range PARAMS ((char)); | |
168 | ||
169 | /* MM: Returns index of given instruction name. */ | |
170 | extern int insn_index PARAMS ((char *)); | |
171 | ||
172 | /* MM: Returns instruction name from index. */ | |
173 | extern const char *insn_name PARAMS ((int)); | |
174 | ||
175 | /* MM: Constructs new FSM, based on or32_opcodes. */ | |
176 | extern void build_automata PARAMS ((void)); | |
177 | ||
178 | /* MM: Destructs FSM. */ | |
179 | extern void destruct_automata PARAMS ((void)); | |
180 | ||
181 | /* MM: Decodes instruction using FSM. Call build_automata first. */ | |
182 | extern int insn_decode PARAMS ((unsigned int)); | |
183 | ||
184 | /* Disassemble one instruction from insn to disassemble. | |
185 | Return the size of the instruction. */ | |
186 | int disassemble_insn PARAMS ((unsigned long)); | |
187 | ||
188 | #endif |