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
|
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2001-2012 The Bochs Project
// Copyright (C) 2017 Google Inc.
//
// 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, write to the Free Software
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA B 02110-1301 USA
/////////////////////////////////////////////////////////////////////////
/*
* flags functions
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "cpu.h"
#include "x86_flags.h"
#include "x86.h"
void SET_FLAGS_OxxxxC(CPUX86State *env, uint32_t new_of, uint32_t new_cf)
{
uint32_t temp_po = new_of ^ new_cf;
env->hvf_emul->lflags.auxbits &= ~(LF_MASK_PO | LF_MASK_CF);
env->hvf_emul->lflags.auxbits |= (temp_po << LF_BIT_PO) |
(new_cf << LF_BIT_CF);
}
void SET_FLAGS_OSZAPC_SUB32(CPUX86State *env, uint32_t v1, uint32_t v2,
uint32_t diff)
{
SET_FLAGS_OSZAPC_SUB_32(v1, v2, diff);
}
void SET_FLAGS_OSZAPC_SUB16(CPUX86State *env, uint16_t v1, uint16_t v2,
uint16_t diff)
{
SET_FLAGS_OSZAPC_SUB_16(v1, v2, diff);
}
void SET_FLAGS_OSZAPC_SUB8(CPUX86State *env, uint8_t v1, uint8_t v2,
uint8_t diff)
{
SET_FLAGS_OSZAPC_SUB_8(v1, v2, diff);
}
void SET_FLAGS_OSZAPC_ADD32(CPUX86State *env, uint32_t v1, uint32_t v2,
uint32_t diff)
{
SET_FLAGS_OSZAPC_ADD_32(v1, v2, diff);
}
void SET_FLAGS_OSZAPC_ADD16(CPUX86State *env, uint16_t v1, uint16_t v2,
uint16_t diff)
{
SET_FLAGS_OSZAPC_ADD_16(v1, v2, diff);
}
void SET_FLAGS_OSZAPC_ADD8(CPUX86State *env, uint8_t v1, uint8_t v2,
uint8_t diff)
{
SET_FLAGS_OSZAPC_ADD_8(v1, v2, diff);
}
void SET_FLAGS_OSZAP_SUB32(CPUX86State *env, uint32_t v1, uint32_t v2,
uint32_t diff)
{
SET_FLAGS_OSZAP_SUB_32(v1, v2, diff);
}
void SET_FLAGS_OSZAP_SUB16(CPUX86State *env, uint16_t v1, uint16_t v2,
uint16_t diff)
{
SET_FLAGS_OSZAP_SUB_16(v1, v2, diff);
}
void SET_FLAGS_OSZAP_SUB8(CPUX86State *env, uint8_t v1, uint8_t v2,
uint8_t diff)
{
SET_FLAGS_OSZAP_SUB_8(v1, v2, diff);
}
void SET_FLAGS_OSZAP_ADD32(CPUX86State *env, uint32_t v1, uint32_t v2,
uint32_t diff)
{
SET_FLAGS_OSZAP_ADD_32(v1, v2, diff);
}
void SET_FLAGS_OSZAP_ADD16(CPUX86State *env, uint16_t v1, uint16_t v2,
uint16_t diff)
{
SET_FLAGS_OSZAP_ADD_16(v1, v2, diff);
}
void SET_FLAGS_OSZAP_ADD8(CPUX86State *env, uint8_t v1, uint8_t v2,
uint8_t diff)
{
SET_FLAGS_OSZAP_ADD_8(v1, v2, diff);
}
void SET_FLAGS_OSZAPC_LOGIC32(CPUX86State *env, uint32_t diff)
{
SET_FLAGS_OSZAPC_LOGIC_32(diff);
}
void SET_FLAGS_OSZAPC_LOGIC16(CPUX86State *env, uint16_t diff)
{
SET_FLAGS_OSZAPC_LOGIC_16(diff);
}
void SET_FLAGS_OSZAPC_LOGIC8(CPUX86State *env, uint8_t diff)
{
SET_FLAGS_OSZAPC_LOGIC_8(diff);
}
void SET_FLAGS_SHR32(CPUX86State *env, uint32_t v, int count, uint32_t res)
{
int cf = (v >> (count - 1)) & 0x1;
int of = (((res << 1) ^ res) >> 31);
SET_FLAGS_OSZAPC_LOGIC_32(res);
SET_FLAGS_OxxxxC(env, of, cf);
}
void SET_FLAGS_SHR16(CPUX86State *env, uint16_t v, int count, uint16_t res)
{
int cf = (v >> (count - 1)) & 0x1;
int of = (((res << 1) ^ res) >> 15);
SET_FLAGS_OSZAPC_LOGIC_16(res);
SET_FLAGS_OxxxxC(env, of, cf);
}
void SET_FLAGS_SHR8(CPUX86State *env, uint8_t v, int count, uint8_t res)
{
int cf = (v >> (count - 1)) & 0x1;
int of = (((res << 1) ^ res) >> 7);
SET_FLAGS_OSZAPC_LOGIC_8(res);
SET_FLAGS_OxxxxC(env, of, cf);
}
void SET_FLAGS_SAR32(CPUX86State *env, int32_t v, int count, uint32_t res)
{
int cf = (v >> (count - 1)) & 0x1;
SET_FLAGS_OSZAPC_LOGIC_32(res);
SET_FLAGS_OxxxxC(env, 0, cf);
}
void SET_FLAGS_SAR16(CPUX86State *env, int16_t v, int count, uint16_t res)
{
int cf = (v >> (count - 1)) & 0x1;
SET_FLAGS_OSZAPC_LOGIC_16(res);
SET_FLAGS_OxxxxC(env, 0, cf);
}
void SET_FLAGS_SAR8(CPUX86State *env, int8_t v, int count, uint8_t res)
{
int cf = (v >> (count - 1)) & 0x1;
SET_FLAGS_OSZAPC_LOGIC_8(res);
SET_FLAGS_OxxxxC(env, 0, cf);
}
void SET_FLAGS_SHL32(CPUX86State *env, uint32_t v, int count, uint32_t res)
{
int of, cf;
cf = (v >> (32 - count)) & 0x1;
of = cf ^ (res >> 31);
SET_FLAGS_OSZAPC_LOGIC_32(res);
SET_FLAGS_OxxxxC(env, of, cf);
}
void SET_FLAGS_SHL16(CPUX86State *env, uint16_t v, int count, uint16_t res)
{
int of = 0, cf = 0;
if (count <= 16) {
cf = (v >> (16 - count)) & 0x1;
of = cf ^ (res >> 15);
}
SET_FLAGS_OSZAPC_LOGIC_16(res);
SET_FLAGS_OxxxxC(env, of, cf);
}
void SET_FLAGS_SHL8(CPUX86State *env, uint8_t v, int count, uint8_t res)
{
int of = 0, cf = 0;
if (count <= 8) {
cf = (v >> (8 - count)) & 0x1;
of = cf ^ (res >> 7);
}
SET_FLAGS_OSZAPC_LOGIC_8(res);
SET_FLAGS_OxxxxC(env, of, cf);
}
bool get_PF(CPUX86State *env)
{
uint32_t temp = (255 & env->hvf_emul->lflags.result);
temp = temp ^ (255 & (env->hvf_emul->lflags.auxbits >> LF_BIT_PDB));
temp = (temp ^ (temp >> 4)) & 0x0F;
return (0x9669U >> temp) & 1;
}
void set_PF(CPUX86State *env, bool val)
{
uint32_t temp = (255 & env->hvf_emul->lflags.result) ^ (!val);
env->hvf_emul->lflags.auxbits &= ~(LF_MASK_PDB);
env->hvf_emul->lflags.auxbits |= (temp << LF_BIT_PDB);
}
bool _get_OF(CPUX86State *env)
{
return ((env->hvf_emul->lflags.auxbits + (1U << LF_BIT_PO)) >> LF_BIT_CF) & 1;
}
bool get_OF(CPUX86State *env)
{
return _get_OF(env);
}
bool _get_CF(CPUX86State *env)
{
return (env->hvf_emul->lflags.auxbits >> LF_BIT_CF) & 1;
}
bool get_CF(CPUX86State *env)
{
return _get_CF(env);
}
void set_OF(CPUX86State *env, bool val)
{
SET_FLAGS_OxxxxC(env, val, _get_CF(env));
}
void set_CF(CPUX86State *env, bool val)
{
SET_FLAGS_OxxxxC(env, _get_OF(env), (val));
}
bool get_AF(CPUX86State *env)
{
return (env->hvf_emul->lflags.auxbits >> LF_BIT_AF) & 1;
}
void set_AF(CPUX86State *env, bool val)
{
env->hvf_emul->lflags.auxbits &= ~(LF_MASK_AF);
env->hvf_emul->lflags.auxbits |= (val) << LF_BIT_AF;
}
bool get_ZF(CPUX86State *env)
{
return !env->hvf_emul->lflags.result;
}
void set_ZF(CPUX86State *env, bool val)
{
if (val) {
env->hvf_emul->lflags.auxbits ^=
(((env->hvf_emul->lflags.result >> LF_SIGN_BIT) & 1) << LF_BIT_SD);
/* merge the parity bits into the Parity Delta Byte */
uint32_t temp_pdb = (255 & env->hvf_emul->lflags.result);
env->hvf_emul->lflags.auxbits ^= (temp_pdb << LF_BIT_PDB);
/* now zero the .result value */
env->hvf_emul->lflags.result = 0;
} else {
env->hvf_emul->lflags.result |= (1 << 8);
}
}
bool get_SF(CPUX86State *env)
{
return ((env->hvf_emul->lflags.result >> LF_SIGN_BIT) ^
(env->hvf_emul->lflags.auxbits >> LF_BIT_SD)) & 1;
}
void set_SF(CPUX86State *env, bool val)
{
bool temp_sf = get_SF(env);
env->hvf_emul->lflags.auxbits ^= (temp_sf ^ val) << LF_BIT_SD;
}
void set_OSZAPC(CPUX86State *env, uint32_t flags32)
{
set_OF(env, env->hvf_emul->rflags.of);
set_SF(env, env->hvf_emul->rflags.sf);
set_ZF(env, env->hvf_emul->rflags.zf);
set_AF(env, env->hvf_emul->rflags.af);
set_PF(env, env->hvf_emul->rflags.pf);
set_CF(env, env->hvf_emul->rflags.cf);
}
void lflags_to_rflags(CPUX86State *env)
{
env->hvf_emul->rflags.cf = get_CF(env);
env->hvf_emul->rflags.pf = get_PF(env);
env->hvf_emul->rflags.af = get_AF(env);
env->hvf_emul->rflags.zf = get_ZF(env);
env->hvf_emul->rflags.sf = get_SF(env);
env->hvf_emul->rflags.of = get_OF(env);
}
void rflags_to_lflags(CPUX86State *env)
{
env->hvf_emul->lflags.auxbits = env->hvf_emul->lflags.result = 0;
set_OF(env, env->hvf_emul->rflags.of);
set_SF(env, env->hvf_emul->rflags.sf);
set_ZF(env, env->hvf_emul->rflags.zf);
set_AF(env, env->hvf_emul->rflags.af);
set_PF(env, env->hvf_emul->rflags.pf);
set_CF(env, env->hvf_emul->rflags.cf);
}
|
