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).
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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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#define MAX_GPRS 32
31#define PAGE_SIZE 4096
32#undef __HALF_WORD_INSN__
33
34#define OPERAND_DELIM (',')
35
36#define OR32_IF_DELAY (1)
37#define OR32_W_FLAG   (2)
38#define OR32_R_FLAG   (4)
39
40struct or32_letter
41{
42  char letter;
43  int  sign;
44  /* int  reloc; relocation per letter ??  */
45};
46
47/* Main instruction specification array.  */
48struct or32_opcode
49{
50  /* Name of the instruction.  */
51  char *name;
52
53  /* A string of characters which describe the operands.
54     Valid characters are:
55     ,() Itself.  Characters appears in the assembly code.
56     rA	 Register operand.
57     rB  Register operand.
58     rD  Register operand.
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).  */
66  char *args;
67
68  /* Opcode and operand encoding.  */
69  char *encoding;
70  void (*exec) (void);
71  unsigned int flags;
72};
73
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)
83
84/* MM: Data how to decode operands.  */
85extern struct insn_op_struct
86{
87  unsigned long type;
88  unsigned long data;
89} **op_start;
90
91#ifdef HAS_EXECUTION
92extern void l_invalid (void);
93extern void l_sfne    (void);
94extern void l_bf      (void);
95extern void l_add     (void);
96extern void l_sw      (void);
97extern void l_sb      (void);
98extern void l_sh      (void);
99extern void l_lwz     (void);
100extern void l_lbs     (void);
101extern void l_lbz     (void);
102extern void l_lhs     (void);
103extern void l_lhz     (void);
104extern void l_movhi   (void);
105extern void l_and     (void);
106extern void l_or      (void);
107extern void l_xor     (void);
108extern void l_sub     (void);
109extern void l_mul     (void);
110extern void l_div     (void);
111extern void l_divu    (void);
112extern void l_sll     (void);
113extern void l_sra     (void);
114extern void l_srl     (void);
115extern void l_j       (void);
116extern void l_jal     (void);
117extern void l_jalr    (void);
118extern void l_jr      (void);
119extern void l_rfe     (void);
120extern void l_nop     (void);
121extern void l_bnf     (void);
122extern void l_sfeq    (void);
123extern void l_sfgts   (void);
124extern void l_sfges   (void);
125extern void l_sflts   (void);
126extern void l_sfles   (void);
127extern void l_sfgtu   (void);
128extern void l_sfgeu   (void);
129extern void l_sfltu   (void);
130extern void l_sfleu   (void);
131extern void l_mtspr   (void);
132extern void l_mfspr   (void);
133extern void l_sys     (void);
134extern void l_trap    (void); /* CZ 21/06/01.  */
135extern void l_macrc   (void);
136extern void l_mac     (void);
137extern void l_msb     (void);
138extern void l_invalid (void);
139extern void l_cust1   (void);
140extern void l_cust2   (void);
141extern void l_cust3   (void);
142extern void l_cust4   (void);
143#endif
144extern void l_none    (void);
145
146extern const struct or32_letter or32_letters[];
147
148extern const struct  or32_opcode or32_opcodes[];
149
150extern const unsigned int or32_num_opcodes;
151
152/* Calculates instruction length in bytes.  Always 4 for OR32.  */
153extern int insn_len (int);
154
155/* Is individual insn's operand signed or unsigned?  */
156extern int letter_signed (char);
157
158/* Number of letters in the individual lettered operand.  */
159extern int letter_range (char);
160
161/* MM: Returns index of given instruction name.  */
162extern int insn_index (char *);
163
164/* MM: Returns instruction name from index.  */
165extern const char *insn_name (int);
166
167/* MM: Constructs new FSM, based on or32_opcodes.  */
168extern void build_automata (void);
169
170/* MM: Destructs FSM.  */
171extern void destruct_automata (void);
172
173/* MM: Decodes instruction using FSM.  Call build_automata first.  */
174extern int insn_decode (unsigned int);
175
176/* Disassemble one instruction from insn to disassemble.
177   Return the size of the instruction.  */
178int disassemble_insn (unsigned long);
179
180#endif
181