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1 | /* | |
2 | * Format of an instruction in memory. | |
3 | * | |
4 | * This file is subject to the terms and conditions of the GNU General Public | |
5 | * License. See the file "COPYING" in the main directory of this archive | |
6 | * for more details. | |
7 | * | |
8 | * Copyright (C) 1996, 2000 by Ralf Baechle | |
9 | * Copyright (C) 2006 by Thiemo Seufer | |
10 | */ | |
11 | #ifndef _ASM_INST_H | |
12 | #define _ASM_INST_H | |
13 | ||
14 | /* | |
15 | * Major opcodes; before MIPS IV cop1x was called cop3. | |
16 | */ | |
17 | enum major_op { | |
18 | spec_op, bcond_op, j_op, jal_op, | |
19 | beq_op, bne_op, blez_op, bgtz_op, | |
20 | addi_op, addiu_op, slti_op, sltiu_op, | |
21 | andi_op, ori_op, xori_op, lui_op, | |
22 | cop0_op, cop1_op, cop2_op, cop1x_op, | |
23 | beql_op, bnel_op, blezl_op, bgtzl_op, | |
24 | daddi_op, daddiu_op, ldl_op, ldr_op, | |
25 | spec2_op, jalx_op, mdmx_op, spec3_op, | |
26 | lb_op, lh_op, lwl_op, lw_op, | |
27 | lbu_op, lhu_op, lwr_op, lwu_op, | |
28 | sb_op, sh_op, swl_op, sw_op, | |
29 | sdl_op, sdr_op, swr_op, cache_op, | |
30 | ll_op, lwc1_op, lwc2_op, pref_op, | |
31 | lld_op, ldc1_op, ldc2_op, ld_op, | |
32 | sc_op, swc1_op, swc2_op, major_3b_op, | |
33 | scd_op, sdc1_op, sdc2_op, sd_op | |
34 | }; | |
35 | ||
36 | /* | |
37 | * func field of spec opcode. | |
38 | */ | |
39 | enum spec_op { | |
40 | sll_op, movc_op, srl_op, sra_op, | |
41 | sllv_op, pmon_op, srlv_op, srav_op, | |
42 | jr_op, jalr_op, movz_op, movn_op, | |
43 | syscall_op, break_op, spim_op, sync_op, | |
44 | mfhi_op, mthi_op, mflo_op, mtlo_op, | |
45 | dsllv_op, spec2_unused_op, dsrlv_op, dsrav_op, | |
46 | mult_op, multu_op, div_op, divu_op, | |
47 | dmult_op, dmultu_op, ddiv_op, ddivu_op, | |
48 | add_op, addu_op, sub_op, subu_op, | |
49 | and_op, or_op, xor_op, nor_op, | |
50 | spec3_unused_op, spec4_unused_op, slt_op, sltu_op, | |
51 | dadd_op, daddu_op, dsub_op, dsubu_op, | |
52 | tge_op, tgeu_op, tlt_op, tltu_op, | |
53 | teq_op, spec5_unused_op, tne_op, spec6_unused_op, | |
54 | dsll_op, spec7_unused_op, dsrl_op, dsra_op, | |
55 | dsll32_op, spec8_unused_op, dsrl32_op, dsra32_op | |
56 | }; | |
57 | ||
58 | /* | |
59 | * func field of spec2 opcode. | |
60 | */ | |
61 | enum spec2_op { | |
62 | madd_op, maddu_op, mul_op, spec2_3_unused_op, | |
63 | msub_op, msubu_op, /* more unused ops */ | |
64 | clz_op = 0x20, clo_op, | |
65 | dclz_op = 0x24, dclo_op, | |
66 | sdbpp_op = 0x3f | |
67 | }; | |
68 | ||
69 | /* | |
70 | * func field of spec3 opcode. | |
71 | */ | |
72 | enum spec3_op { | |
73 | ext_op, dextm_op, dextu_op, dext_op, | |
74 | ins_op, dinsm_op, dinsu_op, dins_op, | |
75 | bshfl_op = 0x20, | |
76 | dbshfl_op = 0x24, | |
77 | rdhwr_op = 0x3b | |
78 | }; | |
79 | ||
80 | /* | |
81 | * rt field of bcond opcodes. | |
82 | */ | |
83 | enum rt_op { | |
84 | bltz_op, bgez_op, bltzl_op, bgezl_op, | |
85 | spimi_op, unused_rt_op_0x05, unused_rt_op_0x06, unused_rt_op_0x07, | |
86 | tgei_op, tgeiu_op, tlti_op, tltiu_op, | |
87 | teqi_op, unused_0x0d_rt_op, tnei_op, unused_0x0f_rt_op, | |
88 | bltzal_op, bgezal_op, bltzall_op, bgezall_op, | |
89 | rt_op_0x14, rt_op_0x15, rt_op_0x16, rt_op_0x17, | |
90 | rt_op_0x18, rt_op_0x19, rt_op_0x1a, rt_op_0x1b, | |
91 | bposge32_op, rt_op_0x1d, rt_op_0x1e, rt_op_0x1f | |
92 | }; | |
93 | ||
94 | /* | |
95 | * rs field of cop opcodes. | |
96 | */ | |
97 | enum cop_op { | |
98 | mfc_op = 0x00, dmfc_op = 0x01, | |
99 | cfc_op = 0x02, mtc_op = 0x04, | |
100 | dmtc_op = 0x05, ctc_op = 0x06, | |
101 | bc_op = 0x08, cop_op = 0x10, | |
102 | copm_op = 0x18 | |
103 | }; | |
104 | ||
105 | /* | |
106 | * rt field of cop.bc_op opcodes | |
107 | */ | |
108 | enum bcop_op { | |
109 | bcf_op, bct_op, bcfl_op, bctl_op | |
110 | }; | |
111 | ||
112 | /* | |
113 | * func field of cop0 coi opcodes. | |
114 | */ | |
115 | enum cop0_coi_func { | |
116 | tlbr_op = 0x01, tlbwi_op = 0x02, | |
117 | tlbwr_op = 0x06, tlbp_op = 0x08, | |
118 | rfe_op = 0x10, eret_op = 0x18 | |
119 | }; | |
120 | ||
121 | /* | |
122 | * func field of cop0 com opcodes. | |
123 | */ | |
124 | enum cop0_com_func { | |
125 | tlbr1_op = 0x01, tlbw_op = 0x02, | |
126 | tlbp1_op = 0x08, dctr_op = 0x09, | |
127 | dctw_op = 0x0a | |
128 | }; | |
129 | ||
130 | /* | |
131 | * fmt field of cop1 opcodes. | |
132 | */ | |
133 | enum cop1_fmt { | |
134 | s_fmt, d_fmt, e_fmt, q_fmt, | |
135 | w_fmt, l_fmt | |
136 | }; | |
137 | ||
138 | /* | |
139 | * func field of cop1 instructions using d, s or w format. | |
140 | */ | |
141 | enum cop1_sdw_func { | |
142 | fadd_op = 0x00, fsub_op = 0x01, | |
143 | fmul_op = 0x02, fdiv_op = 0x03, | |
144 | fsqrt_op = 0x04, fabs_op = 0x05, | |
145 | fmov_op = 0x06, fneg_op = 0x07, | |
146 | froundl_op = 0x08, ftruncl_op = 0x09, | |
147 | fceill_op = 0x0a, ffloorl_op = 0x0b, | |
148 | fround_op = 0x0c, ftrunc_op = 0x0d, | |
149 | fceil_op = 0x0e, ffloor_op = 0x0f, | |
150 | fmovc_op = 0x11, fmovz_op = 0x12, | |
151 | fmovn_op = 0x13, frecip_op = 0x15, | |
152 | frsqrt_op = 0x16, fcvts_op = 0x20, | |
153 | fcvtd_op = 0x21, fcvte_op = 0x22, | |
154 | fcvtw_op = 0x24, fcvtl_op = 0x25, | |
155 | fcmp_op = 0x30 | |
156 | }; | |
157 | ||
158 | /* | |
159 | * func field of cop1x opcodes (MIPS IV). | |
160 | */ | |
161 | enum cop1x_func { | |
162 | lwxc1_op = 0x00, ldxc1_op = 0x01, | |
163 | pfetch_op = 0x07, swxc1_op = 0x08, | |
164 | sdxc1_op = 0x09, madd_s_op = 0x20, | |
165 | madd_d_op = 0x21, madd_e_op = 0x22, | |
166 | msub_s_op = 0x28, msub_d_op = 0x29, | |
167 | msub_e_op = 0x2a, nmadd_s_op = 0x30, | |
168 | nmadd_d_op = 0x31, nmadd_e_op = 0x32, | |
169 | nmsub_s_op = 0x38, nmsub_d_op = 0x39, | |
170 | nmsub_e_op = 0x3a | |
171 | }; | |
172 | ||
173 | /* | |
174 | * func field for mad opcodes (MIPS IV). | |
175 | */ | |
176 | enum mad_func { | |
177 | madd_fp_op = 0x08, msub_fp_op = 0x0a, | |
178 | nmadd_fp_op = 0x0c, nmsub_fp_op = 0x0e | |
179 | }; | |
180 | ||
181 | /* | |
182 | * Damn ... bitfields depend from byteorder :-( | |
183 | */ | |
184 | #ifdef __MIPSEB__ | |
185 | struct j_format { /* Jump format */ | |
186 | unsigned int opcode : 6; | |
187 | unsigned int target : 26; | |
188 | }; | |
189 | ||
190 | struct i_format { /* Immediate format (addi, lw, ...) */ | |
191 | unsigned int opcode : 6; | |
192 | unsigned int rs : 5; | |
193 | unsigned int rt : 5; | |
194 | signed int simmediate : 16; | |
195 | }; | |
196 | ||
197 | struct u_format { /* Unsigned immediate format (ori, xori, ...) */ | |
198 | unsigned int opcode : 6; | |
199 | unsigned int rs : 5; | |
200 | unsigned int rt : 5; | |
201 | unsigned int uimmediate : 16; | |
202 | }; | |
203 | ||
204 | struct c_format { /* Cache (>= R6000) format */ | |
205 | unsigned int opcode : 6; | |
206 | unsigned int rs : 5; | |
207 | unsigned int c_op : 3; | |
208 | unsigned int cache : 2; | |
209 | unsigned int simmediate : 16; | |
210 | }; | |
211 | ||
212 | struct r_format { /* Register format */ | |
213 | unsigned int opcode : 6; | |
214 | unsigned int rs : 5; | |
215 | unsigned int rt : 5; | |
216 | unsigned int rd : 5; | |
217 | unsigned int re : 5; | |
218 | unsigned int func : 6; | |
219 | }; | |
220 | ||
221 | struct p_format { /* Performance counter format (R10000) */ | |
222 | unsigned int opcode : 6; | |
223 | unsigned int rs : 5; | |
224 | unsigned int rt : 5; | |
225 | unsigned int rd : 5; | |
226 | unsigned int re : 5; | |
227 | unsigned int func : 6; | |
228 | }; | |
229 | ||
230 | struct f_format { /* FPU register format */ | |
231 | unsigned int opcode : 6; | |
232 | unsigned int : 1; | |
233 | unsigned int fmt : 4; | |
234 | unsigned int rt : 5; | |
235 | unsigned int rd : 5; | |
236 | unsigned int re : 5; | |
237 | unsigned int func : 6; | |
238 | }; | |
239 | ||
240 | struct ma_format { /* FPU multipy and add format (MIPS IV) */ | |
241 | unsigned int opcode : 6; | |
242 | unsigned int fr : 5; | |
243 | unsigned int ft : 5; | |
244 | unsigned int fs : 5; | |
245 | unsigned int fd : 5; | |
246 | unsigned int func : 4; | |
247 | unsigned int fmt : 2; | |
248 | }; | |
249 | ||
250 | #elif defined(__MIPSEL__) | |
251 | ||
252 | struct j_format { /* Jump format */ | |
253 | unsigned int target : 26; | |
254 | unsigned int opcode : 6; | |
255 | }; | |
256 | ||
257 | struct i_format { /* Immediate format */ | |
258 | signed int simmediate : 16; | |
259 | unsigned int rt : 5; | |
260 | unsigned int rs : 5; | |
261 | unsigned int opcode : 6; | |
262 | }; | |
263 | ||
264 | struct u_format { /* Unsigned immediate format */ | |
265 | unsigned int uimmediate : 16; | |
266 | unsigned int rt : 5; | |
267 | unsigned int rs : 5; | |
268 | unsigned int opcode : 6; | |
269 | }; | |
270 | ||
271 | struct c_format { /* Cache (>= R6000) format */ | |
272 | unsigned int simmediate : 16; | |
273 | unsigned int cache : 2; | |
274 | unsigned int c_op : 3; | |
275 | unsigned int rs : 5; | |
276 | unsigned int opcode : 6; | |
277 | }; | |
278 | ||
279 | struct r_format { /* Register format */ | |
280 | unsigned int func : 6; | |
281 | unsigned int re : 5; | |
282 | unsigned int rd : 5; | |
283 | unsigned int rt : 5; | |
284 | unsigned int rs : 5; | |
285 | unsigned int opcode : 6; | |
286 | }; | |
287 | ||
288 | struct p_format { /* Performance counter format (R10000) */ | |
289 | unsigned int func : 6; | |
290 | unsigned int re : 5; | |
291 | unsigned int rd : 5; | |
292 | unsigned int rt : 5; | |
293 | unsigned int rs : 5; | |
294 | unsigned int opcode : 6; | |
295 | }; | |
296 | ||
297 | struct f_format { /* FPU register format */ | |
298 | unsigned int func : 6; | |
299 | unsigned int re : 5; | |
300 | unsigned int rd : 5; | |
301 | unsigned int rt : 5; | |
302 | unsigned int fmt : 4; | |
303 | unsigned int : 1; | |
304 | unsigned int opcode : 6; | |
305 | }; | |
306 | ||
307 | struct ma_format { /* FPU multipy and add format (MIPS IV) */ | |
308 | unsigned int fmt : 2; | |
309 | unsigned int func : 4; | |
310 | unsigned int fd : 5; | |
311 | unsigned int fs : 5; | |
312 | unsigned int ft : 5; | |
313 | unsigned int fr : 5; | |
314 | unsigned int opcode : 6; | |
315 | }; | |
316 | ||
317 | #else /* !defined (__MIPSEB__) && !defined (__MIPSEL__) */ | |
318 | #error "MIPS but neither __MIPSEL__ nor __MIPSEB__?" | |
319 | #endif | |
320 | ||
321 | union mips_instruction { | |
322 | unsigned int word; | |
323 | unsigned short halfword[2]; | |
324 | unsigned char byte[4]; | |
325 | struct j_format j_format; | |
326 | struct i_format i_format; | |
327 | struct u_format u_format; | |
328 | struct c_format c_format; | |
329 | struct r_format r_format; | |
330 | struct f_format f_format; | |
331 | struct ma_format ma_format; | |
332 | }; | |
333 | ||
334 | /* HACHACHAHCAHC ... */ | |
335 | ||
336 | /* In case some other massaging is needed, keep MIPSInst as wrapper */ | |
337 | ||
338 | #define MIPSInst(x) x | |
339 | ||
340 | #define I_OPCODE_SFT 26 | |
341 | #define MIPSInst_OPCODE(x) (MIPSInst(x) >> I_OPCODE_SFT) | |
342 | ||
343 | #define I_JTARGET_SFT 0 | |
344 | #define MIPSInst_JTARGET(x) (MIPSInst(x) & 0x03ffffff) | |
345 | ||
346 | #define I_RS_SFT 21 | |
347 | #define MIPSInst_RS(x) ((MIPSInst(x) & 0x03e00000) >> I_RS_SFT) | |
348 | ||
349 | #define I_RT_SFT 16 | |
350 | #define MIPSInst_RT(x) ((MIPSInst(x) & 0x001f0000) >> I_RT_SFT) | |
351 | ||
352 | #define I_IMM_SFT 0 | |
353 | #define MIPSInst_SIMM(x) ((int)((short)(MIPSInst(x) & 0xffff))) | |
354 | #define MIPSInst_UIMM(x) (MIPSInst(x) & 0xffff) | |
355 | ||
356 | #define I_CACHEOP_SFT 18 | |
357 | #define MIPSInst_CACHEOP(x) ((MIPSInst(x) & 0x001c0000) >> I_CACHEOP_SFT) | |
358 | ||
359 | #define I_CACHESEL_SFT 16 | |
360 | #define MIPSInst_CACHESEL(x) ((MIPSInst(x) & 0x00030000) >> I_CACHESEL_SFT) | |
361 | ||
362 | #define I_RD_SFT 11 | |
363 | #define MIPSInst_RD(x) ((MIPSInst(x) & 0x0000f800) >> I_RD_SFT) | |
364 | ||
365 | #define I_RE_SFT 6 | |
366 | #define MIPSInst_RE(x) ((MIPSInst(x) & 0x000007c0) >> I_RE_SFT) | |
367 | ||
368 | #define I_FUNC_SFT 0 | |
369 | #define MIPSInst_FUNC(x) (MIPSInst(x) & 0x0000003f) | |
370 | ||
371 | #define I_FFMT_SFT 21 | |
372 | #define MIPSInst_FFMT(x) ((MIPSInst(x) & 0x01e00000) >> I_FFMT_SFT) | |
373 | ||
374 | #define I_FT_SFT 16 | |
375 | #define MIPSInst_FT(x) ((MIPSInst(x) & 0x001f0000) >> I_FT_SFT) | |
376 | ||
377 | #define I_FS_SFT 11 | |
378 | #define MIPSInst_FS(x) ((MIPSInst(x) & 0x0000f800) >> I_FS_SFT) | |
379 | ||
380 | #define I_FD_SFT 6 | |
381 | #define MIPSInst_FD(x) ((MIPSInst(x) & 0x000007c0) >> I_FD_SFT) | |
382 | ||
383 | #define I_FR_SFT 21 | |
384 | #define MIPSInst_FR(x) ((MIPSInst(x) & 0x03e00000) >> I_FR_SFT) | |
385 | ||
386 | #define I_FMA_FUNC_SFT 2 | |
387 | #define MIPSInst_FMA_FUNC(x) ((MIPSInst(x) & 0x0000003c) >> I_FMA_FUNC_SFT) | |
388 | ||
389 | #define I_FMA_FFMT_SFT 0 | |
390 | #define MIPSInst_FMA_FFMT(x) (MIPSInst(x) & 0x00000003) | |
391 | ||
392 | typedef unsigned int mips_instruction; | |
393 | ||
394 | #endif /* _ASM_INST_H */ |