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d172d4ba 1/* Table of opcodes for the DLX microprocess.
250d07de 2 Copyright (C) 2002-2021 Free Software Foundation, Inc.
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3
4 This file is part of GDB and GAS.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
e4e42b45 8 the Free Software Foundation; either version 3 of the License, or
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9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
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18 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 MA 02110-1301, USA.
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20
21 Initially created by Kuang Hwa Lin, 2002. */
22
23/* Following are the function codes for the Special OP (ALU). */
24#define ALUOP 0x00000000
25#define SPECIALOP 0x00000000
26
27#define NOPF 0x00000000
28#define SLLF 0x00000004
29#define SRLF 0x00000006
30#define SRAF 0x00000007
31
32#define SEQUF 0x00000010
33#define SNEUF 0x00000011
34#define SLTUF 0x00000012
35#define SGTUF 0x00000013
36#define SLEUF 0x00000014
37#define SGEUF 0x00000015
38
39#define ADDF 0x00000020
40#define ADDUF 0x00000021
41#define SUBF 0x00000022
42#define SUBUF 0x00000023
43#define ANDF 0x00000024
44#define ORF 0x00000025
45#define XORF 0x00000026
46
47#define SEQF 0x00000028
48#define SNEF 0x00000029
49#define SLTF 0x0000002A
50#define SGTF 0x0000002B
51#define SLEF 0x0000002C
52#define SGEF 0x0000002D
53 /* Following special functions was not mentioned in the
54 Hennessy's book but was implemented in the RTL. */
55#define MVTSF 0x00000030
56#define MVFSF 0x00000031
57#define BSWAPF 0x00000032
58#define LUTF 0x00000033
59/* Following special functions was mentioned in the
60 Hennessy's book but was not implemented in the RTL. */
61#define MULTF 0x00000005
62#define MULTUF 0x00000006
63#define DIVF 0x00000007
64#define DIVUF 0x00000008
65
66
67/* Following are the rest of the OPcodes:
68 JOP = (0x002 << 26), JALOP = (0x003 << 26), BEQOP = (0x004 << 26), BNEOP = (0x005 << 26)
69 ADDIOP = (0x008 << 26), ADDUIOP= (0x009 << 26), SUBIOP = (0x00A << 26), SUBUIOP= (0x00B << 26)
70 ANDIOP = (0x00C << 26), ORIOP = (0x00D << 26), XORIOP = (0x00E << 26), LHIOP = (0x00F << 26)
71 RFEOP = (0x010 << 26), TRAPOP = (0x011 << 26), JROP = (0x012 << 26), JALROP = (0x013 << 26)
72 BREAKOP= (0x014 << 26)
73 SEQIOP = (0x018 << 26), SNEIOP = (0x019 << 26), SLTIOP = (0x01A << 26), SGTIOP = (0x01B << 26)
74 SLEIOP = (0x01C << 26), SGEIOP = (0x01D << 26)
75 LBOP = (0x020 << 26), LHOP = (0x021 << 26), LWOP = (0x023 << 26), LBUOP = (0x024 << 26)
76 LHUOP = (0x025 << 26), SBOP = (0x028 << 26), SHOP = (0x029 << 26), SWOP = (0x02B << 26)
77 LSBUOP = (0x026 << 26), LSHU = (0x027 << 26), LSW = (0x02C << 26),
78 SEQUIOP= (0x030 << 26), SNEUIOP= (0x031 << 26), SLTUIOP= (0x032 << 26), SGTUIOP= (0x033 << 26)
79 SLEUIOP= (0x034 << 26), SGEUIOP= (0x035 << 26)
80 SLLIOP = (0x036 << 26), SRLIOP = (0x037 << 26), SRAIOP = (0x038 << 26). */
81#define JOP 0x08000000
82#define JALOP 0x0c000000
83#define BEQOP 0x10000000
84#define BNEOP 0x14000000
85
86#define ADDIOP 0x20000000
87#define ADDUIOP 0x24000000
88#define SUBIOP 0x28000000
89#define SUBUIOP 0x2c000000
90#define ANDIOP 0x30000000
91#define ORIOP 0x34000000
92#define XORIOP 0x38000000
93#define LHIOP 0x3c000000
94#define RFEOP 0x40000000
95#define TRAPOP 0x44000000
96#define JROP 0x48000000
97#define JALROP 0x4c000000
98#define BREAKOP 0x50000000
99
100#define SEQIOP 0x60000000
101#define SNEIOP 0x64000000
102#define SLTIOP 0x68000000
103#define SGTIOP 0x6c000000
104#define SLEIOP 0x70000000
105#define SGEIOP 0x74000000
106
107#define LBOP 0x80000000
108#define LHOP 0x84000000
109#define LWOP 0x8c000000
110#define LBUOP 0x90000000
111#define LHUOP 0x94000000
112#define LDSTBU
113#define LDSTHU
114#define SBOP 0xa0000000
115#define SHOP 0xa4000000
116#define SWOP 0xac000000
117#define LDST
118
119#define SEQUIOP 0xc0000000
120#define SNEUIOP 0xc4000000
121#define SLTUIOP 0xc8000000
122#define SGTUIOP 0xcc000000
123#define SLEUIOP 0xd0000000
124#define SGEUIOP 0xd4000000
125
126#define SLLIOP 0xd8000000
127#define SRLIOP 0xdc000000
128#define SRAIOP 0xe0000000
129
130/* Following 3 ops was added to provide the MP atonmic operation. */
131#define LSBUOP 0x98000000
132#define LSHUOP 0x9c000000
133#define LSWOP 0xb0000000
134
135/* Following opcode was defined in the Hennessy's book as
136 "normal" opcode but was implemented in the RTL as special
137 functions. */
138#if 0
139#define MVTSOP 0x50000000
140#define MVFSOP 0x54000000
141#endif
142
143struct dlx_opcode
144{
145 /* Name of the instruction. */
f86f5863 146 const char *name;
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147
148 /* Opcode word. */
149 unsigned long opcode;
150
151 /* A string of characters which describe the operands.
152 Valid characters are:
153 , Itself. The character appears in the assembly code.
154 a rs1 The register number is in bits 21-25 of the instruction.
155 b rs2/rd The register number is in bits 16-20 of the instruction.
156 c rd. The register number is in bits 11-15 of the instruction.
157 f FUNC bits 0-10 of the instruction.
158 i An immediate operand is in bits 0-16 of the instruction. 0 extended
159 I An immediate operand is in bits 0-16 of the instruction. sign extended
160 d An 16 bit PC relative displacement.
161 D An immediate operand is in bits 0-25 of the instruction.
162 N No opperands needed, for nops.
163 P it can be a register or a 16 bit operand. */
f86f5863 164 const char *args;
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165};
166
92007e40 167static const struct dlx_opcode dlx_opcodes[] =
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168 {
169 /* Arithmetic and Logic R-TYPE instructions. */
170 { "nop", (ALUOP|NOPF), "N" }, /* NOP */
171 { "add", (ALUOP|ADDF), "c,a,b" }, /* Add */
172 { "addu", (ALUOP|ADDUF), "c,a,b" }, /* Add Unsigned */
173 { "sub", (ALUOP|SUBF), "c,a,b" }, /* SUB */
174 { "subu", (ALUOP|SUBUF), "c,a,b" }, /* Sub Unsigned */
175 { "mult", (ALUOP|MULTF), "c,a,b" }, /* MULTIPLY */
176 { "multu", (ALUOP|MULTUF), "c,a,b" }, /* MULTIPLY Unsigned */
177 { "div", (ALUOP|DIVF), "c,a,b" }, /* DIVIDE */
178 { "divu", (ALUOP|DIVUF), "c,a,b" }, /* DIVIDE Unsigned */
179 { "and", (ALUOP|ANDF), "c,a,b" }, /* AND */
180 { "or", (ALUOP|ORF), "c,a,b" }, /* OR */
181 { "xor", (ALUOP|XORF), "c,a,b" }, /* Exclusive OR */
182 { "sll", (ALUOP|SLLF), "c,a,b" }, /* SHIFT LEFT LOGICAL */
183 { "sra", (ALUOP|SRAF), "c,a,b" }, /* SHIFT RIGHT ARITHMETIC */
184 { "srl", (ALUOP|SRLF), "c,a,b" }, /* SHIFT RIGHT LOGICAL */
185 { "seq", (ALUOP|SEQF), "c,a,b" }, /* Set if equal */
186 { "sne", (ALUOP|SNEF), "c,a,b" }, /* Set if not equal */
187 { "slt", (ALUOP|SLTF), "c,a,b" }, /* Set if less */
188 { "sgt", (ALUOP|SGTF), "c,a,b" }, /* Set if greater */
189 { "sle", (ALUOP|SLEF), "c,a,b" }, /* Set if less or equal */
190 { "sge", (ALUOP|SGEF), "c,a,b" }, /* Set if greater or equal */
191 { "sequ", (ALUOP|SEQUF), "c,a,b" }, /* Set if equal unsigned */
192 { "sneu", (ALUOP|SNEUF), "c,a,b" }, /* Set if not equal unsigned */
193 { "sltu", (ALUOP|SLTUF), "c,a,b" }, /* Set if less unsigned */
194 { "sgtu", (ALUOP|SGTUF), "c,a,b" }, /* Set if greater unsigned */
195 { "sleu", (ALUOP|SLEUF), "c,a,b" }, /* Set if less or equal unsigned*/
196 { "sgeu", (ALUOP|SGEUF), "c,a,b" }, /* Set if greater or equal */
197 { "mvts", (ALUOP|MVTSF), "c,a" }, /* Move to special register */
198 { "mvfs", (ALUOP|MVFSF), "c,a" }, /* Move from special register */
199 { "bswap", (ALUOP|BSWAPF), "c,a,b" }, /* ??? Was not documented */
200 { "lut", (ALUOP|LUTF), "c,a,b" }, /* ????? same as above */
201
202 /* Arithmetic and Logical Immediate I-TYPE instructions. */
203 { "addi", ADDIOP, "b,a,I" }, /* Add Immediate */
204 { "addui", ADDUIOP, "b,a,i" }, /* Add Usigned Immediate */
205 { "subi", SUBIOP, "b,a,I" }, /* Sub Immediate */
206 { "subui", SUBUIOP, "b,a,i" }, /* Sub Unsigned Immedated */
207 { "andi", ANDIOP, "b,a,i" }, /* AND Immediate */
208 { "ori", ORIOP, "b,a,i" }, /* OR Immediate */
209 { "xori", XORIOP, "b,a,i" }, /* Exclusive OR Immediate */
210 { "slli", SLLIOP, "b,a,i" }, /* SHIFT LEFT LOCICAL Immediate */
211 { "srai", SRAIOP, "b,a,i" }, /* SHIFT RIGHT ARITH. Immediate */
212 { "srli", SRLIOP, "b,a,i" }, /* SHIFT RIGHT LOGICAL Immediate*/
213 { "seqi", SEQIOP, "b,a,i" }, /* Set if equal */
214 { "snei", SNEIOP, "b,a,i" }, /* Set if not equal */
215 { "slti", SLTIOP, "b,a,i" }, /* Set if less */
216 { "sgti", SGTIOP, "b,a,i" }, /* Set if greater */
217 { "slei", SLEIOP, "b,a,i" }, /* Set if less or equal */
218 { "sgei", SGEIOP, "b,a,i" }, /* Set if greater or equal */
219 { "sequi", SEQUIOP, "b,a,i" }, /* Set if equal */
220 { "sneui", SNEUIOP, "b,a,i" }, /* Set if not equal */
221 { "sltui", SLTUIOP, "b,a,i" }, /* Set if less */
222 { "sgtui", SGTUIOP, "b,a,i" }, /* Set if greater */
223 { "sleui", SLEUIOP, "b,a,i" }, /* Set if less or equal */
224 { "sgeui", SGEUIOP, "b,a,i" }, /* Set if greater or equal */
225 /* Macros for I type instructions. */
226 { "mov", ADDIOP, "b,P" }, /* a move macro */
227 { "movu", ADDUIOP, "b,P" }, /* a move macro, unsigned */
228
229#if 0
230 /* Move special. */
231 { "mvts", MVTSOP, "b,a" }, /* Move From Integer to Special */
232 { "mvfs", MVFSOP, "b,a" }, /* Move From Special to Integer */
233#endif
234
235 /* Load high Immediate I-TYPE instruction. */
236 { "lhi", LHIOP, "b,i" }, /* Load High Immediate */
237 { "lui", LHIOP, "b,i" }, /* Load High Immediate */
238 { "sethi", LHIOP, "b,i" }, /* Load High Immediate */
239
240 /* LOAD/STORE BYTE 8 bits I-TYPE. */
241 { "lb", LBOP, "b,a,I" }, /* Load Byte */
242 { "lbu", LBUOP, "b,a,I" }, /* Load Byte Unsigned */
243 { "ldstbu", LSBUOP, "b,a,I" }, /* Load store Byte Unsigned */
244 { "sb", SBOP, "b,a,I" }, /* Store Byte */
245
246 /* LOAD/STORE HALFWORD 16 bits. */
247 { "lh", LHOP, "b,a,I" }, /* Load Halfword */
248 { "lhu", LHUOP, "b,a,I" }, /* Load Halfword Unsigned */
249 { "ldsthu", LSHUOP, "b,a,I" }, /* Load Store Halfword Unsigned */
250 { "sh", SHOP, "b,a,I" }, /* Store Halfword */
251
252 /* LOAD/STORE WORD 32 bits. */
253 { "lw", LWOP, "b,a,I" }, /* Load Word */
254 { "sw", SWOP, "b,a,I" }, /* Store Word */
255 { "ldstw", LSWOP, "b,a,I" }, /* Load Store Word */
256
257 /* Branch PC-relative, 16 bits offset. */
258 { "beqz", BEQOP, "a,d" }, /* Branch if a == 0 */
259 { "bnez", BNEOP, "a,d" }, /* Branch if a != 0 */
260 { "beq", BEQOP, "a,d" }, /* Branch if a == 0 */
261 { "bne", BNEOP, "a,d" }, /* Branch if a != 0 */
262
263 /* Jumps Trap and RFE J-TYPE. */
264 { "j", JOP, "D" }, /* Jump, PC-relative 26 bits */
265 { "jal", JALOP, "D" }, /* JAL, PC-relative 26 bits */
266 { "break", BREAKOP, "D" }, /* break to OS */
267 { "trap" , TRAPOP, "D" }, /* TRAP to OS */
268 { "rfe", RFEOP, "N" }, /* Return From Exception */
269 /* Macros. */
270 { "call", JOP, "D" }, /* Jump, PC-relative 26 bits */
271
272 /* Jumps Trap and RFE I-TYPE. */
273 { "jr", JROP, "a" }, /* Jump Register, Abs (32 bits) */
274 { "jalr", JALROP, "a" }, /* JALR, Abs (32 bits) */
275 /* Macros. */
276 { "retr", JROP, "a" }, /* Jump Register, Abs (32 bits) */
277
278 { "", 0x0, "" } /* Dummy entry, not included in NUM_OPCODES.
279 This lets code examine entry i + 1 without
280 checking if we've run off the end of the table. */
281 };
282
283const unsigned int num_dlx_opcodes = (((sizeof dlx_opcodes) / (sizeof dlx_opcodes[0])) - 1);