root / target-i386 / cc_helper.c @ 45724d6d
History | View | Annotate | Download (8.7 kB)
| 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 "helper.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 int compute_all_eflags(CPUX86State *env) |
| 79 |
{
|
| 80 |
return CC_SRC;
|
| 81 |
} |
| 82 |
|
| 83 |
static int compute_c_eflags(CPUX86State *env) |
| 84 |
{
|
| 85 |
return CC_SRC & CC_C;
|
| 86 |
} |
| 87 |
|
| 88 |
uint32_t helper_cc_compute_all(CPUX86State *env, int op)
|
| 89 |
{
|
| 90 |
switch (op) {
|
| 91 |
default: /* should never happen */ |
| 92 |
return 0; |
| 93 |
|
| 94 |
case CC_OP_EFLAGS:
|
| 95 |
return compute_all_eflags(env);
|
| 96 |
|
| 97 |
case CC_OP_MULB:
|
| 98 |
return compute_all_mulb(env);
|
| 99 |
case CC_OP_MULW:
|
| 100 |
return compute_all_mulw(env);
|
| 101 |
case CC_OP_MULL:
|
| 102 |
return compute_all_mull(env);
|
| 103 |
|
| 104 |
case CC_OP_ADDB:
|
| 105 |
return compute_all_addb(env);
|
| 106 |
case CC_OP_ADDW:
|
| 107 |
return compute_all_addw(env);
|
| 108 |
case CC_OP_ADDL:
|
| 109 |
return compute_all_addl(env);
|
| 110 |
|
| 111 |
case CC_OP_ADCB:
|
| 112 |
return compute_all_adcb(env);
|
| 113 |
case CC_OP_ADCW:
|
| 114 |
return compute_all_adcw(env);
|
| 115 |
case CC_OP_ADCL:
|
| 116 |
return compute_all_adcl(env);
|
| 117 |
|
| 118 |
case CC_OP_SUBB:
|
| 119 |
return compute_all_subb(env);
|
| 120 |
case CC_OP_SUBW:
|
| 121 |
return compute_all_subw(env);
|
| 122 |
case CC_OP_SUBL:
|
| 123 |
return compute_all_subl(env);
|
| 124 |
|
| 125 |
case CC_OP_SBBB:
|
| 126 |
return compute_all_sbbb(env);
|
| 127 |
case CC_OP_SBBW:
|
| 128 |
return compute_all_sbbw(env);
|
| 129 |
case CC_OP_SBBL:
|
| 130 |
return compute_all_sbbl(env);
|
| 131 |
|
| 132 |
case CC_OP_LOGICB:
|
| 133 |
return compute_all_logicb(env);
|
| 134 |
case CC_OP_LOGICW:
|
| 135 |
return compute_all_logicw(env);
|
| 136 |
case CC_OP_LOGICL:
|
| 137 |
return compute_all_logicl(env);
|
| 138 |
|
| 139 |
case CC_OP_INCB:
|
| 140 |
return compute_all_incb(env);
|
| 141 |
case CC_OP_INCW:
|
| 142 |
return compute_all_incw(env);
|
| 143 |
case CC_OP_INCL:
|
| 144 |
return compute_all_incl(env);
|
| 145 |
|
| 146 |
case CC_OP_DECB:
|
| 147 |
return compute_all_decb(env);
|
| 148 |
case CC_OP_DECW:
|
| 149 |
return compute_all_decw(env);
|
| 150 |
case CC_OP_DECL:
|
| 151 |
return compute_all_decl(env);
|
| 152 |
|
| 153 |
case CC_OP_SHLB:
|
| 154 |
return compute_all_shlb(env);
|
| 155 |
case CC_OP_SHLW:
|
| 156 |
return compute_all_shlw(env);
|
| 157 |
case CC_OP_SHLL:
|
| 158 |
return compute_all_shll(env);
|
| 159 |
|
| 160 |
case CC_OP_SARB:
|
| 161 |
return compute_all_sarb(env);
|
| 162 |
case CC_OP_SARW:
|
| 163 |
return compute_all_sarw(env);
|
| 164 |
case CC_OP_SARL:
|
| 165 |
return compute_all_sarl(env);
|
| 166 |
|
| 167 |
#ifdef TARGET_X86_64
|
| 168 |
case CC_OP_MULQ:
|
| 169 |
return compute_all_mulq(env);
|
| 170 |
|
| 171 |
case CC_OP_ADDQ:
|
| 172 |
return compute_all_addq(env);
|
| 173 |
|
| 174 |
case CC_OP_ADCQ:
|
| 175 |
return compute_all_adcq(env);
|
| 176 |
|
| 177 |
case CC_OP_SUBQ:
|
| 178 |
return compute_all_subq(env);
|
| 179 |
|
| 180 |
case CC_OP_SBBQ:
|
| 181 |
return compute_all_sbbq(env);
|
| 182 |
|
| 183 |
case CC_OP_LOGICQ:
|
| 184 |
return compute_all_logicq(env);
|
| 185 |
|
| 186 |
case CC_OP_INCQ:
|
| 187 |
return compute_all_incq(env);
|
| 188 |
|
| 189 |
case CC_OP_DECQ:
|
| 190 |
return compute_all_decq(env);
|
| 191 |
|
| 192 |
case CC_OP_SHLQ:
|
| 193 |
return compute_all_shlq(env);
|
| 194 |
|
| 195 |
case CC_OP_SARQ:
|
| 196 |
return compute_all_sarq(env);
|
| 197 |
#endif
|
| 198 |
} |
| 199 |
} |
| 200 |
|
| 201 |
uint32_t cpu_cc_compute_all(CPUX86State *env, int op)
|
| 202 |
{
|
| 203 |
return helper_cc_compute_all(env, op);
|
| 204 |
} |
| 205 |
|
| 206 |
uint32_t helper_cc_compute_c(CPUX86State *env, int op)
|
| 207 |
{
|
| 208 |
switch (op) {
|
| 209 |
default: /* should never happen */ |
| 210 |
return 0; |
| 211 |
|
| 212 |
case CC_OP_EFLAGS:
|
| 213 |
return compute_c_eflags(env);
|
| 214 |
|
| 215 |
case CC_OP_MULB:
|
| 216 |
return compute_c_mull(env);
|
| 217 |
case CC_OP_MULW:
|
| 218 |
return compute_c_mull(env);
|
| 219 |
case CC_OP_MULL:
|
| 220 |
return compute_c_mull(env);
|
| 221 |
|
| 222 |
case CC_OP_ADDB:
|
| 223 |
return compute_c_addb(env);
|
| 224 |
case CC_OP_ADDW:
|
| 225 |
return compute_c_addw(env);
|
| 226 |
case CC_OP_ADDL:
|
| 227 |
return compute_c_addl(env);
|
| 228 |
|
| 229 |
case CC_OP_ADCB:
|
| 230 |
return compute_c_adcb(env);
|
| 231 |
case CC_OP_ADCW:
|
| 232 |
return compute_c_adcw(env);
|
| 233 |
case CC_OP_ADCL:
|
| 234 |
return compute_c_adcl(env);
|
| 235 |
|
| 236 |
case CC_OP_SUBB:
|
| 237 |
return compute_c_subb(env);
|
| 238 |
case CC_OP_SUBW:
|
| 239 |
return compute_c_subw(env);
|
| 240 |
case CC_OP_SUBL:
|
| 241 |
return compute_c_subl(env);
|
| 242 |
|
| 243 |
case CC_OP_SBBB:
|
| 244 |
return compute_c_sbbb(env);
|
| 245 |
case CC_OP_SBBW:
|
| 246 |
return compute_c_sbbw(env);
|
| 247 |
case CC_OP_SBBL:
|
| 248 |
return compute_c_sbbl(env);
|
| 249 |
|
| 250 |
case CC_OP_LOGICB:
|
| 251 |
return compute_c_logicb();
|
| 252 |
case CC_OP_LOGICW:
|
| 253 |
return compute_c_logicw();
|
| 254 |
case CC_OP_LOGICL:
|
| 255 |
return compute_c_logicl();
|
| 256 |
|
| 257 |
case CC_OP_INCB:
|
| 258 |
return compute_c_incl(env);
|
| 259 |
case CC_OP_INCW:
|
| 260 |
return compute_c_incl(env);
|
| 261 |
case CC_OP_INCL:
|
| 262 |
return compute_c_incl(env);
|
| 263 |
|
| 264 |
case CC_OP_DECB:
|
| 265 |
return compute_c_incl(env);
|
| 266 |
case CC_OP_DECW:
|
| 267 |
return compute_c_incl(env);
|
| 268 |
case CC_OP_DECL:
|
| 269 |
return compute_c_incl(env);
|
| 270 |
|
| 271 |
case CC_OP_SHLB:
|
| 272 |
return compute_c_shlb(env);
|
| 273 |
case CC_OP_SHLW:
|
| 274 |
return compute_c_shlw(env);
|
| 275 |
case CC_OP_SHLL:
|
| 276 |
return compute_c_shll(env);
|
| 277 |
|
| 278 |
case CC_OP_SARB:
|
| 279 |
return compute_c_sarl(env);
|
| 280 |
case CC_OP_SARW:
|
| 281 |
return compute_c_sarl(env);
|
| 282 |
case CC_OP_SARL:
|
| 283 |
return compute_c_sarl(env);
|
| 284 |
|
| 285 |
#ifdef TARGET_X86_64
|
| 286 |
case CC_OP_MULQ:
|
| 287 |
return compute_c_mull(env);
|
| 288 |
|
| 289 |
case CC_OP_ADDQ:
|
| 290 |
return compute_c_addq(env);
|
| 291 |
|
| 292 |
case CC_OP_ADCQ:
|
| 293 |
return compute_c_adcq(env);
|
| 294 |
|
| 295 |
case CC_OP_SUBQ:
|
| 296 |
return compute_c_subq(env);
|
| 297 |
|
| 298 |
case CC_OP_SBBQ:
|
| 299 |
return compute_c_sbbq(env);
|
| 300 |
|
| 301 |
case CC_OP_LOGICQ:
|
| 302 |
return compute_c_logicq();
|
| 303 |
|
| 304 |
case CC_OP_INCQ:
|
| 305 |
return compute_c_incl(env);
|
| 306 |
|
| 307 |
case CC_OP_DECQ:
|
| 308 |
return compute_c_incl(env);
|
| 309 |
|
| 310 |
case CC_OP_SHLQ:
|
| 311 |
return compute_c_shlq(env);
|
| 312 |
|
| 313 |
case CC_OP_SARQ:
|
| 314 |
return compute_c_sarl(env);
|
| 315 |
#endif
|
| 316 |
} |
| 317 |
} |
| 318 |
|
| 319 |
void helper_write_eflags(CPUX86State *env, target_ulong t0,
|
| 320 |
uint32_t update_mask) |
| 321 |
{
|
| 322 |
cpu_load_eflags(env, t0, update_mask); |
| 323 |
} |
| 324 |
|
| 325 |
target_ulong helper_read_eflags(CPUX86State *env) |
| 326 |
{
|
| 327 |
uint32_t eflags; |
| 328 |
|
| 329 |
eflags = helper_cc_compute_all(env, CC_OP); |
| 330 |
eflags |= (DF & DF_MASK); |
| 331 |
eflags |= env->eflags & ~(VM_MASK | RF_MASK); |
| 332 |
return eflags;
|
| 333 |
} |
| 334 |
|
| 335 |
void helper_clts(CPUX86State *env)
|
| 336 |
{
|
| 337 |
env->cr[0] &= ~CR0_TS_MASK;
|
| 338 |
env->hflags &= ~HF_TS_MASK; |
| 339 |
} |
| 340 |
|
| 341 |
void helper_reset_rf(CPUX86State *env)
|
| 342 |
{
|
| 343 |
env->eflags &= ~RF_MASK; |
| 344 |
} |
| 345 |
|
| 346 |
void helper_cli(CPUX86State *env)
|
| 347 |
{
|
| 348 |
env->eflags &= ~IF_MASK; |
| 349 |
} |
| 350 |
|
| 351 |
void helper_sti(CPUX86State *env)
|
| 352 |
{
|
| 353 |
env->eflags |= IF_MASK; |
| 354 |
} |
| 355 |
|
| 356 |
#if 0
|
| 357 |
/* vm86plus instructions */
|
| 358 |
void helper_cli_vm(CPUX86State *env)
|
| 359 |
{
|
| 360 |
env->eflags &= ~VIF_MASK;
|
| 361 |
}
|
| 362 |
|
| 363 |
void helper_sti_vm(CPUX86State *env)
|
| 364 |
{
|
| 365 |
env->eflags |= VIF_MASK;
|
| 366 |
if (env->eflags & VIP_MASK) {
|
| 367 |
raise_exception(env, EXCP0D_GPF);
|
| 368 |
}
|
| 369 |
}
|
| 370 |
#endif
|
| 371 |
|
| 372 |
void helper_set_inhibit_irq(CPUX86State *env)
|
| 373 |
{
|
| 374 |
env->hflags |= HF_INHIBIT_IRQ_MASK; |
| 375 |
} |
| 376 |
|
| 377 |
void helper_reset_inhibit_irq(CPUX86State *env)
|
| 378 |
{
|
| 379 |
env->hflags &= ~HF_INHIBIT_IRQ_MASK; |
| 380 |
} |