aboutsummaryrefslogtreecommitdiff
path: root/target/i386/cc_helper.c
blob: 83af223c9f7f13c5bd5a6eea21e2a989ef957d4b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
/*
 *  x86 condition code helpers
 *
 *  Copyright (c) 2003 Fabrice Bellard
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 */

#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/helper-proto.h"

const uint8_t parity_table[256] = {
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    CC_P, 0, 0, CC_P, 0, CC_P, CC_P, 0,
    0, CC_P, CC_P, 0, CC_P, 0, 0, CC_P,
};

#define SHIFT 0
#include "cc_helper_template.h"
#undef SHIFT

#define SHIFT 1
#include "cc_helper_template.h"
#undef SHIFT

#define SHIFT 2
#include "cc_helper_template.h"
#undef SHIFT

#ifdef TARGET_X86_64

#define SHIFT 3
#include "cc_helper_template.h"
#undef SHIFT

#endif

static target_ulong compute_all_adcx(target_ulong dst, target_ulong src1,
                                     target_ulong src2)
{
    return (src1 & ~CC_C) | (dst * CC_C);
}

static target_ulong compute_all_adox(target_ulong dst, target_ulong src1,
                                     target_ulong src2)
{
    return (src1 & ~CC_O) | (src2 * CC_O);
}

static target_ulong compute_all_adcox(target_ulong dst, target_ulong src1,
                                      target_ulong src2)
{
    return (src1 & ~(CC_C | CC_O)) | (dst * CC_C) | (src2 * CC_O);
}

target_ulong helper_cc_compute_all(target_ulong dst, target_ulong src1,
                                   target_ulong src2, int op)
{
    switch (op) {
    default: /* should never happen */
        return 0;

    case CC_OP_EFLAGS:
        return src1;
    case CC_OP_CLR:
        return CC_Z | CC_P;

    case CC_OP_MULB:
        return compute_all_mulb(dst, src1);
    case CC_OP_MULW:
        return compute_all_mulw(dst, src1);
    case CC_OP_MULL:
        return compute_all_mull(dst, src1);

    case CC_OP_ADDB:
        return compute_all_addb(dst, src1);
    case CC_OP_ADDW:
        return compute_all_addw(dst, src1);
    case CC_OP_ADDL:
        return compute_all_addl(dst, src1);

    case CC_OP_ADCB:
        return compute_all_adcb(dst, src1, src2);
    case CC_OP_ADCW:
        return compute_all_adcw(dst, src1, src2);
    case CC_OP_ADCL:
        return compute_all_adcl(dst, src1, src2);

    case CC_OP_SUBB:
        return compute_all_subb(dst, src1);
    case CC_OP_SUBW:
        return compute_all_subw(dst, src1);
    case CC_OP_SUBL:
        return compute_all_subl(dst, src1);

    case CC_OP_SBBB:
        return compute_all_sbbb(dst, src1, src2);
    case CC_OP_SBBW:
        return compute_all_sbbw(dst, src1, src2);
    case CC_OP_SBBL:
        return compute_all_sbbl(dst, src1, src2);

    case CC_OP_LOGICB:
        return compute_all_logicb(dst, src1);
    case CC_OP_LOGICW:
        return compute_all_logicw(dst, src1);
    case CC_OP_LOGICL:
        return compute_all_logicl(dst, src1);

    case CC_OP_INCB:
        return compute_all_incb(dst, src1);
    case CC_OP_INCW:
        return compute_all_incw(dst, src1);
    case CC_OP_INCL:
        return compute_all_incl(dst, src1);

    case CC_OP_DECB:
        return compute_all_decb(dst, src1);
    case CC_OP_DECW:
        return compute_all_decw(dst, src1);
    case CC_OP_DECL:
        return compute_all_decl(dst, src1);

    case CC_OP_SHLB:
        return compute_all_shlb(dst, src1);
    case CC_OP_SHLW:
        return compute_all_shlw(dst, src1);
    case CC_OP_SHLL:
        return compute_all_shll(dst, src1);

    case CC_OP_SARB:
        return compute_all_sarb(dst, src1);
    case CC_OP_SARW:
        return compute_all_sarw(dst, src1);
    case CC_OP_SARL:
        return compute_all_sarl(dst, src1);

    case CC_OP_BMILGB:
        return compute_all_bmilgb(dst, src1);
    case CC_OP_BMILGW:
        return compute_all_bmilgw(dst, src1);
    case CC_OP_BMILGL:
        return compute_all_bmilgl(dst, src1);

    case CC_OP_ADCX:
        return compute_all_adcx(dst, src1, src2);
    case CC_OP_ADOX:
        return compute_all_adox(dst, src1, src2);
    case CC_OP_ADCOX:
        return compute_all_adcox(dst, src1, src2);

#ifdef TARGET_X86_64
    case CC_OP_MULQ:
        return compute_all_mulq(dst, src1);
    case CC_OP_ADDQ:
        return compute_all_addq(dst, src1);
    case CC_OP_ADCQ:
        return compute_all_adcq(dst, src1, src2);
    case CC_OP_SUBQ:
        return compute_all_subq(dst, src1);
    case CC_OP_SBBQ:
        return compute_all_sbbq(dst, src1, src2);
    case CC_OP_LOGICQ:
        return compute_all_logicq(dst, src1);
    case CC_OP_INCQ:
        return compute_all_incq(dst, src1);
    case CC_OP_DECQ:
        return compute_all_decq(dst, src1);
    case CC_OP_SHLQ:
        return compute_all_shlq(dst, src1);
    case CC_OP_SARQ:
        return compute_all_sarq(dst, src1);
    case CC_OP_BMILGQ:
        return compute_all_bmilgq(dst, src1);
#endif
    }
}

uint32_t cpu_cc_compute_all(CPUX86State *env, int op)
{
    return helper_cc_compute_all(CC_DST, CC_SRC, CC_SRC2, op);
}

target_ulong helper_cc_compute_c(target_ulong dst, target_ulong src1,
                                 target_ulong src2, int op)
{
    switch (op) {
    default: /* should never happen */
    case CC_OP_LOGICB:
    case CC_OP_LOGICW:
    case CC_OP_LOGICL:
    case CC_OP_LOGICQ:
    case CC_OP_CLR:
        return 0;

    case CC_OP_EFLAGS:
    case CC_OP_SARB:
    case CC_OP_SARW:
    case CC_OP_SARL:
    case CC_OP_SARQ:
    case CC_OP_ADOX:
        return src1 & 1;

    case CC_OP_INCB:
    case CC_OP_INCW:
    case CC_OP_INCL:
    case CC_OP_INCQ:
    case CC_OP_DECB:
    case CC_OP_DECW:
    case CC_OP_DECL:
    case CC_OP_DECQ:
        return src1;

    case CC_OP_MULB:
    case CC_OP_MULW:
    case CC_OP_MULL:
    case CC_OP_MULQ:
        return src1 != 0;

    case CC_OP_ADCX:
    case CC_OP_ADCOX:
        return dst;

    case CC_OP_ADDB:
        return compute_c_addb(dst, src1);
    case CC_OP_ADDW:
        return compute_c_addw(dst, src1);
    case CC_OP_ADDL:
        return compute_c_addl(dst, src1);

    case CC_OP_ADCB:
        return compute_c_adcb(dst, src1, src2);
    case CC_OP_ADCW:
        return compute_c_adcw(dst, src1, src2);
    case CC_OP_ADCL:
        return compute_c_adcl(dst, src1, src2);

    case CC_OP_SUBB:
        return compute_c_subb(dst, src1);
    case CC_OP_SUBW:
        return compute_c_subw(dst, src1);
    case CC_OP_SUBL:
        return compute_c_subl(dst, src1);

    case CC_OP_SBBB:
        return compute_c_sbbb(dst, src1, src2);
    case CC_OP_SBBW:
        return compute_c_sbbw(dst, src1, src2);
    case CC_OP_SBBL:
        return compute_c_sbbl(dst, src1, src2);

    case CC_OP_SHLB:
        return compute_c_shlb(dst, src1);
    case CC_OP_SHLW:
        return compute_c_shlw(dst, src1);
    case CC_OP_SHLL:
        return compute_c_shll(dst, src1);

    case CC_OP_BMILGB:
        return compute_c_bmilgb(dst, src1);
    case CC_OP_BMILGW:
        return compute_c_bmilgw(dst, src1);
    case CC_OP_BMILGL:
        return compute_c_bmilgl(dst, src1);

#ifdef TARGET_X86_64
    case CC_OP_ADDQ:
        return compute_c_addq(dst, src1);
    case CC_OP_ADCQ:
        return compute_c_adcq(dst, src1, src2);
    case CC_OP_SUBQ:
        return compute_c_subq(dst, src1);
    case CC_OP_SBBQ:
        return compute_c_sbbq(dst, src1, src2);
    case CC_OP_SHLQ:
        return compute_c_shlq(dst, src1);
    case CC_OP_BMILGQ:
        return compute_c_bmilgq(dst, src1);
#endif
    }
}

void helper_write_eflags(CPUX86State *env, target_ulong t0,
                         uint32_t update_mask)
{
    cpu_load_eflags(env, t0, update_mask);
}

target_ulong helper_read_eflags(CPUX86State *env)
{
    uint32_t eflags;

    eflags = cpu_cc_compute_all(env, CC_OP);
    eflags |= (env->df & DF_MASK);
    eflags |= env->eflags & ~(VM_MASK | RF_MASK);
    return eflags;
}

void helper_clts(CPUX86State *env)
{
    env->cr[0] &= ~CR0_TS_MASK;
    env->hflags &= ~HF_TS_MASK;
}

void helper_reset_rf(CPUX86State *env)
{
    env->eflags &= ~RF_MASK;
}

void helper_cli(CPUX86State *env)
{
    env->eflags &= ~IF_MASK;
}

void helper_sti(CPUX86State *env)
{
    env->eflags |= IF_MASK;
}

void helper_clac(CPUX86State *env)
{
    env->eflags &= ~AC_MASK;
}

void helper_stac(CPUX86State *env)
{
    env->eflags |= AC_MASK;
}

#if 0
/* vm86plus instructions */
void helper_cli_vm(CPUX86State *env)
{
    env->eflags &= ~VIF_MASK;
}

void helper_sti_vm(CPUX86State *env)
{
    env->eflags |= VIF_MASK;
    if (env->eflags & VIP_MASK) {
        raise_exception_ra(env, EXCP0D_GPF, GETPC());
    }
}
#endif