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1 | /* |
2 | * x86 condition code helpers | |
3 | * | |
4 | * Copyright (c) 2003 Fabrice Bellard | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library 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 GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include "cpu.h" | |
21 | #include "dyngen-exec.h" | |
22 | #include "helper.h" | |
23 | ||
24 | const uint8_t parity_table[256] = { | |
25 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
26 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
27 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
28 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
29 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
30 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
31 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
32 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
33 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
34 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
35 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
36 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
37 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
38 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
39 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
40 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
41 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
42 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
43 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
44 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
45 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
46 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
47 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
48 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
49 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
50 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
51 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
52 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
53 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
54 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
55 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
56 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
57 | }; | |
58 | ||
59 | #define SHIFT 0 | |
60 | #include "cc_helper_template.h" | |
61 | #undef SHIFT | |
62 | ||
63 | #define SHIFT 1 | |
64 | #include "cc_helper_template.h" | |
65 | #undef SHIFT | |
66 | ||
67 | #define SHIFT 2 | |
68 | #include "cc_helper_template.h" | |
69 | #undef SHIFT | |
70 | ||
71 | #ifdef TARGET_X86_64 | |
72 | ||
73 | #define SHIFT 3 | |
74 | #include "cc_helper_template.h" | |
75 | #undef SHIFT | |
76 | ||
77 | #endif | |
78 | ||
79 | static int compute_all_eflags(void) | |
80 | { | |
81 | return CC_SRC; | |
82 | } | |
83 | ||
84 | static int compute_c_eflags(void) | |
85 | { | |
86 | return CC_SRC & CC_C; | |
87 | } | |
88 | ||
89 | uint32_t helper_cc_compute_all(int op) | |
90 | { | |
91 | switch (op) { | |
92 | default: /* should never happen */ | |
93 | return 0; | |
94 | ||
95 | case CC_OP_EFLAGS: | |
96 | return compute_all_eflags(); | |
97 | ||
98 | case CC_OP_MULB: | |
99 | return compute_all_mulb(); | |
100 | case CC_OP_MULW: | |
101 | return compute_all_mulw(); | |
102 | case CC_OP_MULL: | |
103 | return compute_all_mull(); | |
104 | ||
105 | case CC_OP_ADDB: | |
106 | return compute_all_addb(); | |
107 | case CC_OP_ADDW: | |
108 | return compute_all_addw(); | |
109 | case CC_OP_ADDL: | |
110 | return compute_all_addl(); | |
111 | ||
112 | case CC_OP_ADCB: | |
113 | return compute_all_adcb(); | |
114 | case CC_OP_ADCW: | |
115 | return compute_all_adcw(); | |
116 | case CC_OP_ADCL: | |
117 | return compute_all_adcl(); | |
118 | ||
119 | case CC_OP_SUBB: | |
120 | return compute_all_subb(); | |
121 | case CC_OP_SUBW: | |
122 | return compute_all_subw(); | |
123 | case CC_OP_SUBL: | |
124 | return compute_all_subl(); | |
125 | ||
126 | case CC_OP_SBBB: | |
127 | return compute_all_sbbb(); | |
128 | case CC_OP_SBBW: | |
129 | return compute_all_sbbw(); | |
130 | case CC_OP_SBBL: | |
131 | return compute_all_sbbl(); | |
132 | ||
133 | case CC_OP_LOGICB: | |
134 | return compute_all_logicb(); | |
135 | case CC_OP_LOGICW: | |
136 | return compute_all_logicw(); | |
137 | case CC_OP_LOGICL: | |
138 | return compute_all_logicl(); | |
139 | ||
140 | case CC_OP_INCB: | |
141 | return compute_all_incb(); | |
142 | case CC_OP_INCW: | |
143 | return compute_all_incw(); | |
144 | case CC_OP_INCL: | |
145 | return compute_all_incl(); | |
146 | ||
147 | case CC_OP_DECB: | |
148 | return compute_all_decb(); | |
149 | case CC_OP_DECW: | |
150 | return compute_all_decw(); | |
151 | case CC_OP_DECL: | |
152 | return compute_all_decl(); | |
153 | ||
154 | case CC_OP_SHLB: | |
155 | return compute_all_shlb(); | |
156 | case CC_OP_SHLW: | |
157 | return compute_all_shlw(); | |
158 | case CC_OP_SHLL: | |
159 | return compute_all_shll(); | |
160 | ||
161 | case CC_OP_SARB: | |
162 | return compute_all_sarb(); | |
163 | case CC_OP_SARW: | |
164 | return compute_all_sarw(); | |
165 | case CC_OP_SARL: | |
166 | return compute_all_sarl(); | |
167 | ||
168 | #ifdef TARGET_X86_64 | |
169 | case CC_OP_MULQ: | |
170 | return compute_all_mulq(); | |
171 | ||
172 | case CC_OP_ADDQ: | |
173 | return compute_all_addq(); | |
174 | ||
175 | case CC_OP_ADCQ: | |
176 | return compute_all_adcq(); | |
177 | ||
178 | case CC_OP_SUBQ: | |
179 | return compute_all_subq(); | |
180 | ||
181 | case CC_OP_SBBQ: | |
182 | return compute_all_sbbq(); | |
183 | ||
184 | case CC_OP_LOGICQ: | |
185 | return compute_all_logicq(); | |
186 | ||
187 | case CC_OP_INCQ: | |
188 | return compute_all_incq(); | |
189 | ||
190 | case CC_OP_DECQ: | |
191 | return compute_all_decq(); | |
192 | ||
193 | case CC_OP_SHLQ: | |
194 | return compute_all_shlq(); | |
195 | ||
196 | case CC_OP_SARQ: | |
197 | return compute_all_sarq(); | |
198 | #endif | |
199 | } | |
200 | } | |
201 | ||
202 | uint32_t cpu_cc_compute_all(CPUX86State *env1, int op) | |
203 | { | |
204 | CPUX86State *saved_env; | |
205 | uint32_t ret; | |
206 | ||
207 | saved_env = env; | |
208 | env = env1; | |
209 | ret = helper_cc_compute_all(op); | |
210 | env = saved_env; | |
211 | return ret; | |
212 | } | |
213 | ||
214 | uint32_t helper_cc_compute_c(int op) | |
215 | { | |
216 | switch (op) { | |
217 | default: /* should never happen */ | |
218 | return 0; | |
219 | ||
220 | case CC_OP_EFLAGS: | |
221 | return compute_c_eflags(); | |
222 | ||
223 | case CC_OP_MULB: | |
224 | return compute_c_mull(); | |
225 | case CC_OP_MULW: | |
226 | return compute_c_mull(); | |
227 | case CC_OP_MULL: | |
228 | return compute_c_mull(); | |
229 | ||
230 | case CC_OP_ADDB: | |
231 | return compute_c_addb(); | |
232 | case CC_OP_ADDW: | |
233 | return compute_c_addw(); | |
234 | case CC_OP_ADDL: | |
235 | return compute_c_addl(); | |
236 | ||
237 | case CC_OP_ADCB: | |
238 | return compute_c_adcb(); | |
239 | case CC_OP_ADCW: | |
240 | return compute_c_adcw(); | |
241 | case CC_OP_ADCL: | |
242 | return compute_c_adcl(); | |
243 | ||
244 | case CC_OP_SUBB: | |
245 | return compute_c_subb(); | |
246 | case CC_OP_SUBW: | |
247 | return compute_c_subw(); | |
248 | case CC_OP_SUBL: | |
249 | return compute_c_subl(); | |
250 | ||
251 | case CC_OP_SBBB: | |
252 | return compute_c_sbbb(); | |
253 | case CC_OP_SBBW: | |
254 | return compute_c_sbbw(); | |
255 | case CC_OP_SBBL: | |
256 | return compute_c_sbbl(); | |
257 | ||
258 | case CC_OP_LOGICB: | |
259 | return compute_c_logicb(); | |
260 | case CC_OP_LOGICW: | |
261 | return compute_c_logicw(); | |
262 | case CC_OP_LOGICL: | |
263 | return compute_c_logicl(); | |
264 | ||
265 | case CC_OP_INCB: | |
266 | return compute_c_incl(); | |
267 | case CC_OP_INCW: | |
268 | return compute_c_incl(); | |
269 | case CC_OP_INCL: | |
270 | return compute_c_incl(); | |
271 | ||
272 | case CC_OP_DECB: | |
273 | return compute_c_incl(); | |
274 | case CC_OP_DECW: | |
275 | return compute_c_incl(); | |
276 | case CC_OP_DECL: | |
277 | return compute_c_incl(); | |
278 | ||
279 | case CC_OP_SHLB: | |
280 | return compute_c_shlb(); | |
281 | case CC_OP_SHLW: | |
282 | return compute_c_shlw(); | |
283 | case CC_OP_SHLL: | |
284 | return compute_c_shll(); | |
285 | ||
286 | case CC_OP_SARB: | |
287 | return compute_c_sarl(); | |
288 | case CC_OP_SARW: | |
289 | return compute_c_sarl(); | |
290 | case CC_OP_SARL: | |
291 | return compute_c_sarl(); | |
292 | ||
293 | #ifdef TARGET_X86_64 | |
294 | case CC_OP_MULQ: | |
295 | return compute_c_mull(); | |
296 | ||
297 | case CC_OP_ADDQ: | |
298 | return compute_c_addq(); | |
299 | ||
300 | case CC_OP_ADCQ: | |
301 | return compute_c_adcq(); | |
302 | ||
303 | case CC_OP_SUBQ: | |
304 | return compute_c_subq(); | |
305 | ||
306 | case CC_OP_SBBQ: | |
307 | return compute_c_sbbq(); | |
308 | ||
309 | case CC_OP_LOGICQ: | |
310 | return compute_c_logicq(); | |
311 | ||
312 | case CC_OP_INCQ: | |
313 | return compute_c_incl(); | |
314 | ||
315 | case CC_OP_DECQ: | |
316 | return compute_c_incl(); | |
317 | ||
318 | case CC_OP_SHLQ: | |
319 | return compute_c_shlq(); | |
320 | ||
321 | case CC_OP_SARQ: | |
322 | return compute_c_sarl(); | |
323 | #endif | |
324 | } | |
325 | } | |
326 | ||
327 | void helper_write_eflags(target_ulong t0, uint32_t update_mask) | |
328 | { | |
329 | cpu_load_eflags(env, t0, update_mask); | |
330 | } | |
331 | ||
332 | target_ulong helper_read_eflags(void) | |
333 | { | |
334 | uint32_t eflags; | |
335 | ||
336 | eflags = helper_cc_compute_all(CC_OP); | |
337 | eflags |= (DF & DF_MASK); | |
338 | eflags |= env->eflags & ~(VM_MASK | RF_MASK); | |
339 | return eflags; | |
340 | } | |
341 | ||
342 | void helper_clts(void) | |
343 | { | |
344 | env->cr[0] &= ~CR0_TS_MASK; | |
345 | env->hflags &= ~HF_TS_MASK; | |
346 | } | |
347 | ||
348 | void helper_reset_rf(void) | |
349 | { | |
350 | env->eflags &= ~RF_MASK; | |
351 | } | |
352 | ||
353 | void helper_cli(void) | |
354 | { | |
355 | env->eflags &= ~IF_MASK; | |
356 | } | |
357 | ||
358 | void helper_sti(void) | |
359 | { | |
360 | env->eflags |= IF_MASK; | |
361 | } | |
362 | ||
363 | #if 0 | |
364 | /* vm86plus instructions */ | |
365 | void helper_cli_vm(void) | |
366 | { | |
367 | env->eflags &= ~VIF_MASK; | |
368 | } | |
369 | ||
370 | void helper_sti_vm(void) | |
371 | { | |
372 | env->eflags |= VIF_MASK; | |
373 | if (env->eflags & VIP_MASK) { | |
374 | raise_exception(env, EXCP0D_GPF); | |
375 | } | |
376 | } | |
377 | #endif | |
378 | ||
379 | void helper_set_inhibit_irq(void) | |
380 | { | |
381 | env->hflags |= HF_INHIBIT_IRQ_MASK; | |
382 | } | |
383 | ||
384 | void helper_reset_inhibit_irq(void) | |
385 | { | |
386 | env->hflags &= ~HF_INHIBIT_IRQ_MASK; | |
387 | } |