target-i386/exec.h

   1 /*
   2  *  i386 execution defines
   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, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20 #include "config.h"
  21 #include "dyngen-exec.h"
  22
  23 /* at least 4 register variables are defines */
  24 register struct CPUX86State *env asm(AREG0);
  25 register uint32_t T0 asm(AREG1);
  26 register uint32_t T1 asm(AREG2);
  27 register uint32_t T2 asm(AREG3);
  28
  29 #define A0 T2
  30
  31 /* if more registers are available, we define some registers too */
  32 #ifdef AREG4
  33 register uint32_t EAX asm(AREG4);
  34 #define reg_EAX
  35 #endif
  36
  37 #ifdef AREG5
  38 register uint32_t ESP asm(AREG5);
  39 #define reg_ESP
  40 #endif
  41
  42 #ifdef AREG6
  43 register uint32_t EBP asm(AREG6);
  44 #define reg_EBP
  45 #endif
  46
  47 #ifdef AREG7
  48 register uint32_t ECX asm(AREG7);
  49 #define reg_ECX
  50 #endif
  51
  52 #ifdef AREG8
  53 register uint32_t EDX asm(AREG8);
  54 #define reg_EDX
  55 #endif
  56
  57 #ifdef AREG9
  58 register uint32_t EBX asm(AREG9);
  59 #define reg_EBX
  60 #endif
  61
  62 #ifdef AREG10
  63 register uint32_t ESI asm(AREG10);
  64 #define reg_ESI
  65 #endif
  66
  67 #ifdef AREG11
  68 register uint32_t EDI asm(AREG11);
  69 #define reg_EDI
  70 #endif
  71
  72 extern FILE *logfile;
  73 extern int loglevel;
  74
  75 #ifndef reg_EAX
  76 #define EAX (env->regs[R_EAX])
  77 #endif
  78 #ifndef reg_ECX
  79 #define ECX (env->regs[R_ECX])
  80 #endif
  81 #ifndef reg_EDX
  82 #define EDX (env->regs[R_EDX])
  83 #endif
  84 #ifndef reg_EBX
  85 #define EBX (env->regs[R_EBX])
  86 #endif
  87 #ifndef reg_ESP
  88 #define ESP (env->regs[R_ESP])
  89 #endif
  90 #ifndef reg_EBP
  91 #define EBP (env->regs[R_EBP])
  92 #endif
  93 #ifndef reg_ESI
  94 #define ESI (env->regs[R_ESI])
  95 #endif
  96 #ifndef reg_EDI
  97 #define EDI (env->regs[R_EDI])
  98 #endif
  99 #define EIP  (env->eip)
 100 #define DF  (env->df)
 101
 102 #define CC_SRC (env->cc_src)
 103 #define CC_DST (env->cc_dst)
 104 #define CC_OP  (env->cc_op)
 105
 106 /* float macros */
 107 #define FT0    (env->ft0)
 108 #define ST0    (env->fpregs[env->fpstt])
 109 #define ST(n)  (env->fpregs[(env->fpstt + (n)) & 7])
 110 #define ST1    ST(1)
 111
 112 #ifdef USE_FP_CONVERT
 113 #define FP_CONVERT  (env->fp_convert)
 114 #endif
 115
 116 #include "cpu.h"
 117 #include "exec-all.h"
 118
 119 typedef struct CCTable {
 120     int (*compute_all)(void); /* return all the flags */
 121     int (*compute_c)(void);  /* return the C flag */
 122 } CCTable;
 123
 124 extern CCTable cc_table[];
 125
 126 void load_seg(int seg_reg, int selector);
 127 void helper_ljmp_protected_T0_T1(int next_eip);
 128 void helper_lcall_real_T0_T1(int shift, int next_eip);
 129 void helper_lcall_protected_T0_T1(int shift, int next_eip);
 130 void helper_iret_real(int shift);
 131 void helper_iret_protected(int shift, int next_eip);
 132 void helper_lret_protected(int shift, int addend);
 133 void helper_lldt_T0(void);
 134 void helper_ltr_T0(void);
 135 void helper_movl_crN_T0(int reg);
 136 void helper_movl_drN_T0(int reg);
 137 void helper_invlpg(unsigned int addr);
 138 void cpu_x86_update_cr0(CPUX86State *env, uint32_t new_cr0);
 139 void cpu_x86_update_cr3(CPUX86State *env, uint32_t new_cr3);
 140 void cpu_x86_update_cr4(CPUX86State *env, uint32_t new_cr4);
 141 void cpu_x86_flush_tlb(CPUX86State *env, uint32_t addr);
 142 int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr,
 143                              int is_write, int is_user, int is_softmmu);
 144 void tlb_fill(unsigned long addr, int is_write, int is_user,
 145               void *retaddr);
 146 void __hidden cpu_lock(void);
 147 void __hidden cpu_unlock(void);
 148 void do_interrupt(int intno, int is_int, int error_code,
 149                   unsigned int next_eip, int is_hw);
 150 void do_interrupt_user(int intno, int is_int, int error_code,
 151                        unsigned int next_eip);
 152 void raise_interrupt(int intno, int is_int, int error_code,
 153                      unsigned int next_eip);
 154 void raise_exception_err(int exception_index, int error_code);
 155 void raise_exception(int exception_index);
 156 void __hidden cpu_loop_exit(void);
 157 void helper_fsave(uint8_t *ptr, int data32);
 158 void helper_frstor(uint8_t *ptr, int data32);
 159
 160 void OPPROTO op_movl_eflags_T0(void);
 161 void OPPROTO op_movl_T0_eflags(void);
 162 void raise_interrupt(int intno, int is_int, int error_code,
 163                      unsigned int next_eip);
 164 void raise_exception_err(int exception_index, int error_code);
 165 void raise_exception(int exception_index);
 166 void helper_divl_EAX_T0(uint32_t eip);
 167 void helper_idivl_EAX_T0(uint32_t eip);
 168 void helper_cmpxchg8b(void);
 169 void helper_cpuid(void);
 170 void helper_rdtsc(void);
 171 void helper_rdmsr(void);
 172 void helper_wrmsr(void);
 173 void helper_lsl(void);
 174 void helper_lar(void);
 175 void helper_verr(void);
 176 void helper_verw(void);
 177
 178 void check_iob_T0(void);
 179 void check_iow_T0(void);
 180 void check_iol_T0(void);
 181 void check_iob_DX(void);
 182 void check_iow_DX(void);
 183 void check_iol_DX(void);
 184
 185 /* XXX: move that to a generic header */
 186 #if !defined(CONFIG_USER_ONLY)
 187
 188 #define ldul_user ldl_user
 189 #define ldul_kernel ldl_kernel
 190
 191 #define ACCESS_TYPE 0
 192 #define MEMSUFFIX _kernel
 193 #define DATA_SIZE 1
 194 #include "softmmu_header.h"
 195
 196 #define DATA_SIZE 2
 197 #include "softmmu_header.h"
 198
 199 #define DATA_SIZE 4
 200 #include "softmmu_header.h"
 201
 202 #define DATA_SIZE 8
 203 #include "softmmu_header.h"
 204 #undef ACCESS_TYPE
 205 #undef MEMSUFFIX
 206
 207 #define ACCESS_TYPE 1
 208 #define MEMSUFFIX _user
 209 #define DATA_SIZE 1
 210 #include "softmmu_header.h"
 211
 212 #define DATA_SIZE 2
 213 #include "softmmu_header.h"
 214
 215 #define DATA_SIZE 4
 216 #include "softmmu_header.h"
 217
 218 #define DATA_SIZE 8
 219 #include "softmmu_header.h"
 220 #undef ACCESS_TYPE
 221 #undef MEMSUFFIX
 222
 223 /* these access are slower, they must be as rare as possible */
 224 #define ACCESS_TYPE 2
 225 #define MEMSUFFIX _data
 226 #define DATA_SIZE 1
 227 #include "softmmu_header.h"
 228
 229 #define DATA_SIZE 2
 230 #include "softmmu_header.h"
 231
 232 #define DATA_SIZE 4
 233 #include "softmmu_header.h"
 234
 235 #define DATA_SIZE 8
 236 #include "softmmu_header.h"
 237 #undef ACCESS_TYPE
 238 #undef MEMSUFFIX
 239
 240 #define ldub(p) ldub_data(p)
 241 #define ldsb(p) ldsb_data(p)
 242 #define lduw(p) lduw_data(p)
 243 #define ldsw(p) ldsw_data(p)
 244 #define ldl(p) ldl_data(p)
 245 #define ldq(p) ldq_data(p)
 246
 247 #define stb(p, v) stb_data(p, v)
 248 #define stw(p, v) stw_data(p, v)
 249 #define stl(p, v) stl_data(p, v)
 250 #define stq(p, v) stq_data(p, v)
 251
 252 static inline double ldfq(void *ptr)
 253 {
 254     union {
 255         double d;
 256         uint64_t i;
 257     } u;
 258     u.i = ldq(ptr);
 259     return u.d;
 260 }
 261
 262 static inline void stfq(void *ptr, double v)
 263 {
 264     union {
 265         double d;
 266         uint64_t i;
 267     } u;
 268     u.d = v;
 269     stq(ptr, u.i);
 270 }
 271
 272 static inline float ldfl(void *ptr)
 273 {
 274     union {
 275         float f;
 276         uint32_t i;
 277     } u;
 278     u.i = ldl(ptr);
 279     return u.f;
 280 }
 281
 282 static inline void stfl(void *ptr, float v)
 283 {
 284     union {
 285         float f;
 286         uint32_t i;
 287     } u;
 288     u.f = v;
 289     stl(ptr, u.i);
 290 }
 291
 292 #endif /* !defined(CONFIG_USER_ONLY) */
 293
 294 #ifdef USE_X86LDOUBLE
 295 /* use long double functions */
 296 #define lrint lrintl
 297 #define llrint llrintl
 298 #define fabs fabsl
 299 #define sin sinl
 300 #define cos cosl
 301 #define sqrt sqrtl
 302 #define pow powl
 303 #define log logl
 304 #define tan tanl
 305 #define atan2 atan2l
 306 #define floor floorl
 307 #define ceil ceill
 308 #define rint rintl
 309 #endif
 310
 311 #if !defined(_BSD)
 312 extern int lrint(CPU86_LDouble x);
 313 extern int64_t llrint(CPU86_LDouble x);
 314 #else
 315 #define lrint(d)                ((int)rint(d))
 316 #define llrint(d)               ((int)rint(d))
 317 #endif
 318 extern CPU86_LDouble fabs(CPU86_LDouble x);
 319 extern CPU86_LDouble sin(CPU86_LDouble x);
 320 extern CPU86_LDouble cos(CPU86_LDouble x);
 321 extern CPU86_LDouble sqrt(CPU86_LDouble x);
 322 extern CPU86_LDouble pow(CPU86_LDouble, CPU86_LDouble);
 323 extern CPU86_LDouble log(CPU86_LDouble x);
 324 extern CPU86_LDouble tan(CPU86_LDouble x);
 325 extern CPU86_LDouble atan2(CPU86_LDouble, CPU86_LDouble);
 326 extern CPU86_LDouble floor(CPU86_LDouble x);
 327 extern CPU86_LDouble ceil(CPU86_LDouble x);
 328 extern CPU86_LDouble rint(CPU86_LDouble x);
 329
 330 #define RC_MASK         0xc00
 331 #define RC_NEAR         0x000
 332 #define RC_DOWN         0x400
 333 #define RC_UP           0x800
 334 #define RC_CHOP         0xc00
 335
 336 #define MAXTAN 9223372036854775808.0
 337
 338 #ifdef __arm__
 339 /* we have no way to do correct rounding - a FPU emulator is needed */
 340 #define FE_DOWNWARD   FE_TONEAREST
 341 #define FE_UPWARD     FE_TONEAREST
 342 #define FE_TOWARDZERO FE_TONEAREST
 343 #endif
 344
 345 #ifdef USE_X86LDOUBLE
 346
 347 /* only for x86 */
 348 typedef union {
 349     long double d;
 350     struct {
 351         unsigned long long lower;
 352         unsigned short upper;
 353     } l;
 354 } CPU86_LDoubleU;
 355
 356 /* the following deal with x86 long double-precision numbers */
 357 #define MAXEXPD 0x7fff
 358 #define EXPBIAS 16383
 359 #define EXPD(fp)        (fp.l.upper & 0x7fff)
 360 #define SIGND(fp)       ((fp.l.upper) & 0x8000)
 361 #define MANTD(fp)       (fp.l.lower)
 362 #define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7fff)) | EXPBIAS
 363
 364 #else
 365
 366 /* NOTE: arm is horrible as double 32 bit words are stored in big endian ! */
 367 typedef union {
 368     double d;
 369 #if !defined(WORDS_BIGENDIAN) && !defined(__arm__)
 370     struct {
 371         uint32_t lower;
 372         int32_t upper;
 373     } l;
 374 #else
 375     struct {
 376         int32_t upper;
 377         uint32_t lower;
 378     } l;
 379 #endif
 380 #ifndef __arm__
 381     int64_t ll;
 382 #endif
 383 } CPU86_LDoubleU;
 384
 385 /* the following deal with IEEE double-precision numbers */
 386 #define MAXEXPD 0x7ff
 387 #define EXPBIAS 1023
 388 #define EXPD(fp)        (((fp.l.upper) >> 20) & 0x7FF)
 389 #define SIGND(fp)       ((fp.l.upper) & 0x80000000)
 390 #ifdef __arm__
 391 #define MANTD(fp)       (fp.l.lower | ((uint64_t)(fp.l.upper & ((1 << 20) - 1)) << 32))
 392 #else
 393 #define MANTD(fp)       (fp.ll & ((1LL << 52) - 1))
 394 #endif
 395 #define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7ff << 20)) | (EXPBIAS << 20)
 396 #endif
 397
 398 static inline void fpush(void)
 399 {
 400     env->fpstt = (env->fpstt - 1) & 7;
 401     env->fptags[env->fpstt] = 0; /* validate stack entry */
 402 }
 403
 404 static inline void fpop(void)
 405 {
 406     env->fptags[env->fpstt] = 1; /* invvalidate stack entry */
 407     env->fpstt = (env->fpstt + 1) & 7;
 408 }
 409
 410 #ifndef USE_X86LDOUBLE
 411 static inline CPU86_LDouble helper_fldt(uint8_t *ptr)
 412 {
 413     CPU86_LDoubleU temp;
 414     int upper, e;
 415     uint64_t ll;
 416
 417     /* mantissa */
 418     upper = lduw(ptr + 8);
 419     /* XXX: handle overflow ? */
 420     e = (upper & 0x7fff) - 16383 + EXPBIAS; /* exponent */
 421     e |= (upper >> 4) & 0x800; /* sign */
 422     ll = (ldq(ptr) >> 11) & ((1LL << 52) - 1);
 423 #ifdef __arm__
 424     temp.l.upper = (e << 20) | (ll >> 32);
 425     temp.l.lower = ll;
 426 #else
 427     temp.ll = ll | ((uint64_t)e << 52);
 428 #endif
 429     return temp.d;
 430 }
 431
 432 static inline void helper_fstt(CPU86_LDouble f, uint8_t *ptr)
 433 {
 434     CPU86_LDoubleU temp;
 435     int e;
 436
 437     temp.d = f;
 438     /* mantissa */
 439     stq(ptr, (MANTD(temp) << 11) | (1LL << 63));
 440     /* exponent + sign */
 441     e = EXPD(temp) - EXPBIAS + 16383;
 442     e |= SIGND(temp) >> 16;
 443     stw(ptr + 8, e);
 444 }
 445 #else
 446
 447 /* XXX: same endianness assumed */
 448
 449 #ifdef CONFIG_USER_ONLY
 450
 451 static inline CPU86_LDouble helper_fldt(uint8_t *ptr)
 452 {
 453     return *(CPU86_LDouble *)ptr;
 454 }
 455
 456 static inline void helper_fstt(CPU86_LDouble f, uint8_t *ptr)
 457 {
 458     *(CPU86_LDouble *)ptr = f;
 459 }
 460
 461 #else
 462
 463 /* we use memory access macros */
 464
 465 static inline CPU86_LDouble helper_fldt(uint8_t *ptr)
 466 {
 467     CPU86_LDoubleU temp;
 468
 469     temp.l.lower = ldq(ptr);
 470     temp.l.upper = lduw(ptr + 8);
 471     return temp.d;
 472 }
 473
 474 static inline void helper_fstt(CPU86_LDouble f, uint8_t *ptr)
 475 {
 476     CPU86_LDoubleU temp;
 477
 478     temp.d = f;
 479     stq(ptr, temp.l.lower);
 480     stw(ptr + 8, temp.l.upper);
 481 }
 482
 483 #endif /* !CONFIG_USER_ONLY */
 484
 485 #endif /* USE_X86LDOUBLE */
 486
 487 #define FPUS_IE (1 << 0)
 488 #define FPUS_DE (1 << 1)
 489 #define FPUS_ZE (1 << 2)
 490 #define FPUS_OE (1 << 3)
 491 #define FPUS_UE (1 << 4)
 492 #define FPUS_PE (1 << 5)
 493 #define FPUS_SF (1 << 6)
 494 #define FPUS_SE (1 << 7)
 495 #define FPUS_B  (1 << 15)
 496
 497 #define FPUC_EM 0x3f
 498
 499 const CPU86_LDouble f15rk[7];
 500
 501 void helper_fldt_ST0_A0(void);
 502 void helper_fstt_ST0_A0(void);
 503 void fpu_raise_exception(void);
 504 CPU86_LDouble helper_fdiv(CPU86_LDouble a, CPU86_LDouble b);
 505 void helper_fbld_ST0_A0(void);
 506 void helper_fbst_ST0_A0(void);
 507 void helper_f2xm1(void);
 508 void helper_fyl2x(void);
 509 void helper_fptan(void);
 510 void helper_fpatan(void);
 511 void helper_fxtract(void);
 512 void helper_fprem1(void);
 513 void helper_fprem(void);
 514 void helper_fyl2xp1(void);
 515 void helper_fsqrt(void);
 516 void helper_fsincos(void);
 517 void helper_frndint(void);
 518 void helper_fscale(void);
 519 void helper_fsin(void);
 520 void helper_fcos(void);
 521 void helper_fxam_ST0(void);
 522 void helper_fstenv(uint8_t *ptr, int data32);
 523 void helper_fldenv(uint8_t *ptr, int data32);
 524 void helper_fsave(uint8_t *ptr, int data32);
 525 void helper_frstor(uint8_t *ptr, int data32);
 526 void restore_native_fp_state(CPUState *env);
 527 void save_native_fp_state(CPUState *env);
 528
 529 const uint8_t parity_table[256];
 530 const uint8_t rclw_table[32];
 531 const uint8_t rclb_table[32];
 532
 533 static inline uint32_t compute_eflags(void)
 534 {
 535     return env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK);
 536 }
 537
 538 /* NOTE: CC_OP must be modified manually to CC_OP_EFLAGS */
 539 static inline void load_eflags(int eflags, int update_mask)
 540 {
 541     CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
 542     DF = 1 - (2 * ((eflags >> 10) & 1));
 543     env->eflags = (env->eflags & ~update_mask) |
 544         (eflags & update_mask);
 545 }
 546