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3c3bdf30 | 1 | /* mmix.h -- Header file for MMIX opcode table |
2571583a | 2 | Copyright (C) 2001-2017 Free Software Foundation, Inc. |
3c3bdf30 NC |
3 | Written by Hans-Peter Nilsson (hp@bitrange.com) |
4 | ||
e4e42b45 | 5 | This file is part of GDB, GAS, and the GNU binutils. |
3c3bdf30 | 6 | |
e4e42b45 NC |
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 3, | |
10 | or (at your option) any later version. | |
3c3bdf30 | 11 | |
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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. | |
3c3bdf30 | 16 | |
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17 | You should have received a copy of the GNU General Public License |
18 | along with this file; see the file COPYING3. If not, write to the Free | |
19 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, | |
20 | MA 02110-1301, USA. */ | |
3c3bdf30 NC |
21 | |
22 | /* We could have just a char*[] table indexed by the register number, but | |
23 | that would not allow for synonyms. The table is terminated with an | |
24 | entry with a NULL name. */ | |
25 | struct mmix_spec_reg | |
26 | { | |
27 | const char *name; | |
28 | unsigned int number; | |
29 | }; | |
30 | ||
31 | /* General indication of the type of instruction. */ | |
32 | enum mmix_insn_type | |
33 | { | |
34 | mmix_type_pseudo, | |
35 | mmix_type_normal, | |
36 | mmix_type_branch, | |
37 | mmix_type_condbranch, | |
38 | mmix_type_memaccess_octa, | |
39 | mmix_type_memaccess_tetra, | |
40 | mmix_type_memaccess_wyde, | |
41 | mmix_type_memaccess_byte, | |
42 | mmix_type_memaccess_block, | |
43 | mmix_type_jsr | |
44 | }; | |
45 | ||
46 | /* Type of operands an instruction takes. Use when parsing assembly code | |
47 | and disassembling. */ | |
48 | enum mmix_operands_type | |
49 | { | |
50 | mmix_operands_none = 0, | |
51 | ||
52 | /* All operands are registers: "$X,$Y,$Z". */ | |
53 | mmix_operands_regs, | |
54 | ||
55 | /* "$X,YZ", like SETH. */ | |
56 | mmix_operands_reg_yz, | |
57 | ||
58 | /* The regular "$X,$Y,$Z|Z". | |
59 | The Z is optional; if only "$X,$Y" is given, then "$X,$Y,0" is | |
60 | assumed. */ | |
61 | mmix_operands_regs_z_opt, | |
62 | ||
63 | /* The regular "$X,$Y,$Z|Z". */ | |
64 | mmix_operands_regs_z, | |
65 | ||
66 | /* "Address"; only JMP. Zero operands allowed unless GNU syntax. */ | |
67 | mmix_operands_jmp, | |
68 | ||
69 | /* "$X|X,$Y,$Z|Z": PUSHGO; like "3", but X can be expressed as an | |
70 | integer. */ | |
71 | mmix_operands_pushgo, | |
72 | ||
73 | /* Two registers or a register and a byte, like FLOT, possibly with | |
74 | rounding: "$X,$Z|Z" or "$X,ROUND_MODE,$Z|Z". */ | |
75 | mmix_operands_roundregs_z, | |
76 | ||
77 | /* "X,YZ", POP. Unless GNU syntax, zero or one operand is allowed. */ | |
78 | mmix_operands_pop, | |
79 | ||
80 | /* Two registers, possibly with rounding: "$X,$Z" or | |
81 | "$X,ROUND_MODE,$Z". */ | |
82 | mmix_operands_roundregs, | |
83 | ||
84 | /* "XYZ", like SYNC. */ | |
85 | mmix_operands_sync, | |
86 | ||
87 | /* "X,$Y,$Z|Z", like SYNCD. */ | |
88 | mmix_operands_x_regs_z, | |
89 | ||
90 | /* "$X,Y,$Z|Z", like NEG and NEGU. The Y field is optional, default 0. */ | |
91 | mmix_operands_neg, | |
92 | ||
93 | /* "$X,Address, like GETA or branches. */ | |
94 | mmix_operands_regaddr, | |
95 | ||
96 | /* "$X|X,Address, like PUSHJ. */ | |
97 | mmix_operands_pushj, | |
98 | ||
99 | /* "$X,spec_reg"; GET. */ | |
100 | mmix_operands_get, | |
101 | ||
102 | /* "spec_reg,$Z|Z"; PUT. */ | |
103 | mmix_operands_put, | |
104 | ||
105 | /* Two registers, "$X,$Y". */ | |
106 | mmix_operands_set, | |
107 | ||
108 | /* "$X,0"; SAVE. */ | |
109 | mmix_operands_save, | |
110 | ||
111 | /* "0,$Z"; UNSAVE. */ | |
112 | mmix_operands_unsave, | |
113 | ||
114 | /* "X,Y,Z"; like SWYM or TRAP. Zero (or 1 if GNU syntax) to three | |
115 | operands, interpreted as 0; XYZ; X, YZ and X, Y, Z. */ | |
116 | mmix_operands_xyz_opt, | |
117 | ||
118 | /* Just "Z", like RESUME. Unless GNU syntax, the operand can be omitted | |
119 | and will then be assumed zero. */ | |
120 | mmix_operands_resume, | |
121 | ||
122 | /* These are specials to handle that pseudo-directives are specified | |
123 | like ordinary insns when being mmixal-compatible. They signify the | |
124 | specific pseudo-directive rather than the operands type. */ | |
125 | ||
126 | /* LOC. */ | |
127 | mmix_operands_loc, | |
128 | ||
129 | /* PREFIX. */ | |
130 | mmix_operands_prefix, | |
131 | ||
132 | /* BYTE. */ | |
133 | mmix_operands_byte, | |
134 | ||
135 | /* WYDE. */ | |
136 | mmix_operands_wyde, | |
137 | ||
138 | /* TETRA. */ | |
139 | mmix_operands_tetra, | |
140 | ||
141 | /* OCTA. */ | |
142 | mmix_operands_octa, | |
143 | ||
144 | /* LOCAL. */ | |
145 | mmix_operands_local, | |
146 | ||
147 | /* BSPEC. */ | |
148 | mmix_operands_bspec, | |
149 | ||
150 | /* ESPEC. */ | |
151 | mmix_operands_espec, | |
152 | }; | |
153 | ||
154 | struct mmix_opcode | |
155 | { | |
156 | const char *name; | |
157 | unsigned long match; | |
158 | unsigned long lose; | |
159 | enum mmix_operands_type operands; | |
160 | ||
161 | /* This is used by the disassembly function. */ | |
162 | enum mmix_insn_type type; | |
163 | }; | |
164 | ||
165 | /* Declare the actual tables. */ | |
166 | extern const struct mmix_opcode mmix_opcodes[]; | |
167 | ||
168 | /* This one is terminated with an entry with a NULL name. */ | |
169 | extern const struct mmix_spec_reg mmix_spec_regs[]; | |
170 | ||
171 | /* Some insn values we use when padding and synthesizing address loads. */ | |
172 | #define IMM_OFFSET_BIT 1 | |
173 | #define COND_INV_BIT 0x8 | |
174 | #define PRED_INV_BIT 0x10 | |
175 | ||
176 | #define PUSHGO_INSN_BYTE 0xbe | |
177 | #define GO_INSN_BYTE 0x9e | |
178 | #define SETL_INSN_BYTE 0xe3 | |
179 | #define INCML_INSN_BYTE 0xe6 | |
180 | #define INCMH_INSN_BYTE 0xe5 | |
181 | #define INCH_INSN_BYTE 0xe4 | |
182 | #define SWYM_INSN_BYTE 0xfd | |
906e88d4 | 183 | #define JMP_INSN_BYTE 0xf0 |
3c3bdf30 NC |
184 | |
185 | /* We can have 256 - 32 (local registers) - 1 ($255 is not allocatable) | |
186 | global registers. */ | |
187 | #define MAX_GREGS 223 |