1 /* Table of opcodes for the OpenRISC 1000 ISA.
2 Copyright 2002, 2003 Free Software Foundation, Inc.
3 Contributed by Damjan Lampret (lampret@opencores.org).
5 This file is part of or1k_gen_isa, or1ksim, GDB and GAS.
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.
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.
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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
21 /* We treat all letters the same in encode/decode routines so
22 we need to assign some characteristics to them like signess etc. */
27 #define NUM_UNSIGNED (0)
28 #define NUM_SIGNED (1)
31 #define PAGE_SIZE 4096
32 #undef __HALF_WORD_INSN__
34 #define OPERAND_DELIM (',')
36 #define OR32_IF_DELAY (1)
37 #define OR32_W_FLAG (2)
38 #define OR32_R_FLAG (4)
44 /* int reloc; relocation per letter ?? */
47 /* Main instruction specification array. */
50 /* Name of the instruction. */
53 /* A string of characters which describe the operands.
55 ,() Itself. Characters appears in the assembly code.
59 I An immediate operand, range -32768 to 32767.
60 J An immediate operand, range . (unused)
61 K An immediate operand, range 0 to 65535.
62 L An immediate operand, range 0 to 63.
63 M An immediate operand, range . (unused)
64 N An immediate operand, range -33554432 to 33554431.
65 O An immediate operand, range . (unused). */
68 /* Opcode and operand encoding. */
74 #define OPTYPE_LAST (0x80000000)
75 #define OPTYPE_OP (0x40000000)
76 #define OPTYPE_REG (0x20000000)
77 #define OPTYPE_SIG (0x10000000)
78 #define OPTYPE_DIS (0x08000000)
79 #define OPTYPE_DST (0x04000000)
80 #define OPTYPE_SBIT (0x00001F00)
81 #define OPTYPE_SHR (0x0000001F)
82 #define OPTYPE_SBIT_SHR (8)
84 /* MM: Data how to decode operands. */
85 extern struct insn_op_struct
92 extern void l_invalid (void);
93 extern void l_sfne (void);
94 extern void l_bf (void);
95 extern void l_add (void);
96 extern void l_sw (void);
97 extern void l_sb (void);
98 extern void l_sh (void);
99 extern void l_lwz (void);
100 extern void l_lbs (void);
101 extern void l_lbz (void);
102 extern void l_lhs (void);
103 extern void l_lhz (void);
104 extern void l_movhi (void);
105 extern void l_and (void);
106 extern void l_or (void);
107 extern void l_xor (void);
108 extern void l_sub (void);
109 extern void l_mul (void);
110 extern void l_div (void);
111 extern void l_divu (void);
112 extern void l_sll (void);
113 extern void l_sra (void);
114 extern void l_srl (void);
115 extern void l_j (void);
116 extern void l_jal (void);
117 extern void l_jalr (void);
118 extern void l_jr (void);
119 extern void l_rfe (void);
120 extern void l_nop (void);
121 extern void l_bnf (void);
122 extern void l_sfeq (void);
123 extern void l_sfgts (void);
124 extern void l_sfges (void);
125 extern void l_sflts (void);
126 extern void l_sfles (void);
127 extern void l_sfgtu (void);
128 extern void l_sfgeu (void);
129 extern void l_sfltu (void);
130 extern void l_sfleu (void);
131 extern void l_mtspr (void);
132 extern void l_mfspr (void);
133 extern void l_sys (void);
134 extern void l_trap (void); /* CZ 21/06/01. */
135 extern void l_macrc (void);
136 extern void l_mac (void);
137 extern void l_msb (void);
138 extern void l_invalid (void);
139 extern void l_cust1 (void);
140 extern void l_cust2 (void);
141 extern void l_cust3 (void);
142 extern void l_cust4 (void);
144 extern void l_none (void);
146 extern const struct or32_letter or32_letters
[];
148 extern const struct or32_opcode or32_opcodes
[];
150 extern const unsigned int or32_num_opcodes
;
152 /* Calculates instruction length in bytes. Always 4 for OR32. */
153 extern int insn_len (int);
155 /* Is individual insn's operand signed or unsigned? */
156 extern int letter_signed (char);
158 /* Number of letters in the individual lettered operand. */
159 extern int letter_range (char);
161 /* MM: Returns index of given instruction name. */
162 extern int insn_index (char *);
164 /* MM: Returns instruction name from index. */
165 extern const char *insn_name (int);
167 /* MM: Constructs new FSM, based on or32_opcodes. */
168 extern void build_automata (void);
170 /* MM: Destructs FSM. */
171 extern void destruct_automata (void);
173 /* MM: Decodes instruction using FSM. Call build_automata first. */
174 extern int insn_decode (unsigned int);
176 /* Disassemble one instruction from insn to disassemble.
177 Return the size of the instruction. */
178 int disassemble_insn (unsigned long);
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