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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 "exec/helper-proto.h" | |
22 | ||
23 | const uint8_t parity_table[256] = { | |
24 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
25 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
26 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
27 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
28 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
29 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
30 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
31 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
32 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
33 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
34 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
35 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
36 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
37 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
38 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
39 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
40 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
41 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
42 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
43 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
44 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
45 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
46 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
47 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
48 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
49 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
50 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
51 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
52 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
53 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
54 | CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0, | |
55 | 0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P, | |
56 | }; | |
57 | ||
58 | #define SHIFT 0 | |
59 | #include "cc_helper_template.h" | |
60 | #undef SHIFT | |
61 | ||
62 | #define SHIFT 1 | |
63 | #include "cc_helper_template.h" | |
64 | #undef SHIFT | |
65 | ||
66 | #define SHIFT 2 | |
67 | #include "cc_helper_template.h" | |
68 | #undef SHIFT | |
69 | ||
70 | #ifdef TARGET_X86_64 | |
71 | ||
72 | #define SHIFT 3 | |
73 | #include "cc_helper_template.h" | |
74 | #undef SHIFT | |
75 | ||
76 | #endif | |
77 | ||
78 | static target_ulong compute_all_adcx(target_ulong dst, target_ulong src1, | |
79 | target_ulong src2) | |
80 | { | |
81 | return (src1 & ~CC_C) | (dst * CC_C); | |
82 | } | |
83 | ||
84 | static target_ulong compute_all_adox(target_ulong dst, target_ulong src1, | |
85 | target_ulong src2) | |
86 | { | |
87 | return (src1 & ~CC_O) | (src2 * CC_O); | |
88 | } | |
89 | ||
90 | static target_ulong compute_all_adcox(target_ulong dst, target_ulong src1, | |
91 | target_ulong src2) | |
92 | { | |
93 | return (src1 & ~(CC_C | CC_O)) | (dst * CC_C) | (src2 * CC_O); | |
94 | } | |
95 | ||
96 | target_ulong helper_cc_compute_all(target_ulong dst, target_ulong src1, | |
97 | target_ulong src2, int op) | |
98 | { | |
99 | switch (op) { | |
100 | default: /* should never happen */ | |
101 | return 0; | |
102 | ||
103 | case CC_OP_EFLAGS: | |
104 | return src1; | |
105 | case CC_OP_CLR: | |
106 | return CC_Z | CC_P; | |
107 | ||
108 | case CC_OP_MULB: | |
109 | return compute_all_mulb(dst, src1); | |
110 | case CC_OP_MULW: | |
111 | return compute_all_mulw(dst, src1); | |
112 | case CC_OP_MULL: | |
113 | return compute_all_mull(dst, src1); | |
114 | ||
115 | case CC_OP_ADDB: | |
116 | return compute_all_addb(dst, src1); | |
117 | case CC_OP_ADDW: | |
118 | return compute_all_addw(dst, src1); | |
119 | case CC_OP_ADDL: | |
120 | return compute_all_addl(dst, src1); | |
121 | ||
122 | case CC_OP_ADCB: | |
123 | return compute_all_adcb(dst, src1, src2); | |
124 | case CC_OP_ADCW: | |
125 | return compute_all_adcw(dst, src1, src2); | |
126 | case CC_OP_ADCL: | |
127 | return compute_all_adcl(dst, src1, src2); | |
128 | ||
129 | case CC_OP_SUBB: | |
130 | return compute_all_subb(dst, src1); | |
131 | case CC_OP_SUBW: | |
132 | return compute_all_subw(dst, src1); | |
133 | case CC_OP_SUBL: | |
134 | return compute_all_subl(dst, src1); | |
135 | ||
136 | case CC_OP_SBBB: | |
137 | return compute_all_sbbb(dst, src1, src2); | |
138 | case CC_OP_SBBW: | |
139 | return compute_all_sbbw(dst, src1, src2); | |
140 | case CC_OP_SBBL: | |
141 | return compute_all_sbbl(dst, src1, src2); | |
142 | ||
143 | case CC_OP_LOGICB: | |
144 | return compute_all_logicb(dst, src1); | |
145 | case CC_OP_LOGICW: | |
146 | return compute_all_logicw(dst, src1); | |
147 | case CC_OP_LOGICL: | |
148 | return compute_all_logicl(dst, src1); | |
149 | ||
150 | case CC_OP_INCB: | |
151 | return compute_all_incb(dst, src1); | |
152 | case CC_OP_INCW: | |
153 | return compute_all_incw(dst, src1); | |
154 | case CC_OP_INCL: | |
155 | return compute_all_incl(dst, src1); | |
156 | ||
157 | case CC_OP_DECB: | |
158 | return compute_all_decb(dst, src1); | |
159 | case CC_OP_DECW: | |
160 | return compute_all_decw(dst, src1); | |
161 | case CC_OP_DECL: | |
162 | return compute_all_decl(dst, src1); | |
163 | ||
164 | case CC_OP_SHLB: | |
165 | return compute_all_shlb(dst, src1); | |
166 | case CC_OP_SHLW: | |
167 | return compute_all_shlw(dst, src1); | |
168 | case CC_OP_SHLL: | |
169 | return compute_all_shll(dst, src1); | |
170 | ||
171 | case CC_OP_SARB: | |
172 | return compute_all_sarb(dst, src1); | |
173 | case CC_OP_SARW: | |
174 | return compute_all_sarw(dst, src1); | |
175 | case CC_OP_SARL: | |
176 | return compute_all_sarl(dst, src1); | |
177 | ||
178 | case CC_OP_BMILGB: | |
179 | return compute_all_bmilgb(dst, src1); | |
180 | case CC_OP_BMILGW: | |
181 | return compute_all_bmilgw(dst, src1); | |
182 | case CC_OP_BMILGL: | |
183 | return compute_all_bmilgl(dst, src1); | |
184 | ||
185 | case CC_OP_ADCX: | |
186 | return compute_all_adcx(dst, src1, src2); | |
187 | case CC_OP_ADOX: | |
188 | return compute_all_adox(dst, src1, src2); | |
189 | case CC_OP_ADCOX: | |
190 | return compute_all_adcox(dst, src1, src2); | |
191 | ||
192 | #ifdef TARGET_X86_64 | |
193 | case CC_OP_MULQ: | |
194 | return compute_all_mulq(dst, src1); | |
195 | case CC_OP_ADDQ: | |
196 | return compute_all_addq(dst, src1); | |
197 | case CC_OP_ADCQ: | |
198 | return compute_all_adcq(dst, src1, src2); | |
199 | case CC_OP_SUBQ: | |
200 | return compute_all_subq(dst, src1); | |
201 | case CC_OP_SBBQ: | |
202 | return compute_all_sbbq(dst, src1, src2); | |
203 | case CC_OP_LOGICQ: | |
204 | return compute_all_logicq(dst, src1); | |
205 | case CC_OP_INCQ: | |
206 | return compute_all_incq(dst, src1); | |
207 | case CC_OP_DECQ: | |
208 | return compute_all_decq(dst, src1); | |
209 | case CC_OP_SHLQ: | |
210 | return compute_all_shlq(dst, src1); | |
211 | case CC_OP_SARQ: | |
212 | return compute_all_sarq(dst, src1); | |
213 | case CC_OP_BMILGQ: | |
214 | return compute_all_bmilgq(dst, src1); | |
215 | #endif | |
216 | } | |
217 | } | |
218 | ||
219 | uint32_t cpu_cc_compute_all(CPUX86State *env, int op) | |
220 | { | |
221 | return helper_cc_compute_all(CC_DST, CC_SRC, CC_SRC2, op); | |
222 | } | |
223 | ||
224 | target_ulong helper_cc_compute_c(target_ulong dst, target_ulong src1, | |
225 | target_ulong src2, int op) | |
226 | { | |
227 | switch (op) { | |
228 | default: /* should never happen */ | |
229 | case CC_OP_LOGICB: | |
230 | case CC_OP_LOGICW: | |
231 | case CC_OP_LOGICL: | |
232 | case CC_OP_LOGICQ: | |
233 | case CC_OP_CLR: | |
234 | return 0; | |
235 | ||
236 | case CC_OP_EFLAGS: | |
237 | case CC_OP_SARB: | |
238 | case CC_OP_SARW: | |
239 | case CC_OP_SARL: | |
240 | case CC_OP_SARQ: | |
241 | case CC_OP_ADOX: | |
242 | return src1 & 1; | |
243 | ||
244 | case CC_OP_INCB: | |
245 | case CC_OP_INCW: | |
246 | case CC_OP_INCL: | |
247 | case CC_OP_INCQ: | |
248 | case CC_OP_DECB: | |
249 | case CC_OP_DECW: | |
250 | case CC_OP_DECL: | |
251 | case CC_OP_DECQ: | |
252 | return src1; | |
253 | ||
254 | case CC_OP_MULB: | |
255 | case CC_OP_MULW: | |
256 | case CC_OP_MULL: | |
257 | case CC_OP_MULQ: | |
258 | return src1 != 0; | |
259 | ||
260 | case CC_OP_ADCX: | |
261 | case CC_OP_ADCOX: | |
262 | return dst; | |
263 | ||
264 | case CC_OP_ADDB: | |
265 | return compute_c_addb(dst, src1); | |
266 | case CC_OP_ADDW: | |
267 | return compute_c_addw(dst, src1); | |
268 | case CC_OP_ADDL: | |
269 | return compute_c_addl(dst, src1); | |
270 | ||
271 | case CC_OP_ADCB: | |
272 | return compute_c_adcb(dst, src1, src2); | |
273 | case CC_OP_ADCW: | |
274 | return compute_c_adcw(dst, src1, src2); | |
275 | case CC_OP_ADCL: | |
276 | return compute_c_adcl(dst, src1, src2); | |
277 | ||
278 | case CC_OP_SUBB: | |
279 | return compute_c_subb(dst, src1); | |
280 | case CC_OP_SUBW: | |
281 | return compute_c_subw(dst, src1); | |
282 | case CC_OP_SUBL: | |
283 | return compute_c_subl(dst, src1); | |
284 | ||
285 | case CC_OP_SBBB: | |
286 | return compute_c_sbbb(dst, src1, src2); | |
287 | case CC_OP_SBBW: | |
288 | return compute_c_sbbw(dst, src1, src2); | |
289 | case CC_OP_SBBL: | |
290 | return compute_c_sbbl(dst, src1, src2); | |
291 | ||
292 | case CC_OP_SHLB: | |
293 | return compute_c_shlb(dst, src1); | |
294 | case CC_OP_SHLW: | |
295 | return compute_c_shlw(dst, src1); | |
296 | case CC_OP_SHLL: | |
297 | return compute_c_shll(dst, src1); | |
298 | ||
299 | case CC_OP_BMILGB: | |
300 | return compute_c_bmilgb(dst, src1); | |
301 | case CC_OP_BMILGW: | |
302 | return compute_c_bmilgw(dst, src1); | |
303 | case CC_OP_BMILGL: | |
304 | return compute_c_bmilgl(dst, src1); | |
305 | ||
306 | #ifdef TARGET_X86_64 | |
307 | case CC_OP_ADDQ: | |
308 | return compute_c_addq(dst, src1); | |
309 | case CC_OP_ADCQ: | |
310 | return compute_c_adcq(dst, src1, src2); | |
311 | case CC_OP_SUBQ: | |
312 | return compute_c_subq(dst, src1); | |
313 | case CC_OP_SBBQ: | |
314 | return compute_c_sbbq(dst, src1, src2); | |
315 | case CC_OP_SHLQ: | |
316 | return compute_c_shlq(dst, src1); | |
317 | case CC_OP_BMILGQ: | |
318 | return compute_c_bmilgq(dst, src1); | |
319 | #endif | |
320 | } | |
321 | } | |
322 | ||
323 | void helper_write_eflags(CPUX86State *env, target_ulong t0, | |
324 | uint32_t update_mask) | |
325 | { | |
326 | cpu_load_eflags(env, t0, update_mask); | |
327 | } | |
328 | ||
329 | target_ulong helper_read_eflags(CPUX86State *env) | |
330 | { | |
331 | uint32_t eflags; | |
332 | ||
333 | eflags = cpu_cc_compute_all(env, CC_OP); | |
334 | eflags |= (env->df & DF_MASK); | |
335 | eflags |= env->eflags & ~(VM_MASK | RF_MASK); | |
336 | return eflags; | |
337 | } | |
338 | ||
339 | void helper_clts(CPUX86State *env) | |
340 | { | |
341 | env->cr[0] &= ~CR0_TS_MASK; | |
342 | env->hflags &= ~HF_TS_MASK; | |
343 | } | |
344 | ||
345 | void helper_reset_rf(CPUX86State *env) | |
346 | { | |
347 | env->eflags &= ~RF_MASK; | |
348 | } | |
349 | ||
350 | void helper_cli(CPUX86State *env) | |
351 | { | |
352 | env->eflags &= ~IF_MASK; | |
353 | } | |
354 | ||
355 | void helper_sti(CPUX86State *env) | |
356 | { | |
357 | env->eflags |= IF_MASK; | |
358 | } | |
359 | ||
360 | void helper_clac(CPUX86State *env) | |
361 | { | |
362 | env->eflags &= ~AC_MASK; | |
363 | } | |
364 | ||
365 | void helper_stac(CPUX86State *env) | |
366 | { | |
367 | env->eflags |= AC_MASK; | |
368 | } | |
369 | ||
370 | #if 0 | |
371 | /* vm86plus instructions */ | |
372 | void helper_cli_vm(CPUX86State *env) | |
373 | { | |
374 | env->eflags &= ~VIF_MASK; | |
375 | } | |
376 | ||
377 | void helper_sti_vm(CPUX86State *env) | |
378 | { | |
379 | env->eflags |= VIF_MASK; | |
380 | if (env->eflags & VIP_MASK) { | |
381 | raise_exception(env, EXCP0D_GPF); | |
382 | } | |
383 | } | |
384 | #endif | |
385 | ||
386 | void helper_set_inhibit_irq(CPUX86State *env) | |
387 | { | |
388 | env->hflags |= HF_INHIBIT_IRQ_MASK; | |
389 | } | |
390 | ||
391 | void helper_reset_inhibit_irq(CPUX86State *env) | |
392 | { | |
393 | env->hflags &= ~HF_INHIBIT_IRQ_MASK; | |
394 | } |