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