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, unsigned cur_eip);
 126 void helper_ljmp_protected_T0_T1(void);
 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);
 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);
 138 void cpu_x86_update_cr3(CPUX86State *env);
 139 void cpu_x86_flush_tlb(CPUX86State *env, uint32_t addr);
 140 int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr,
 141                              int is_write, int is_user, int is_softmmu);
 142 void tlb_fill(unsigned long addr, int is_write, int is_user,
 143               void *retaddr);
 144 void __hidden cpu_lock(void);
 145 void __hidden cpu_unlock(void);
 146 void do_interrupt(int intno, int is_int, int error_code,
 147                   unsigned int next_eip, int is_hw);
 148 void do_interrupt_user(int intno, int is_int, int error_code,
 149                        unsigned int next_eip);
 150 void raise_interrupt(int intno, int is_int, int error_code,
 151                      unsigned int next_eip);
 152 void raise_exception_err(int exception_index, int error_code);
 153 void raise_exception(int exception_index);
 154 void __hidden cpu_loop_exit(void);
 155 void helper_fsave(uint8_t *ptr, int data32);
 156 void helper_frstor(uint8_t *ptr, int data32);
 157
 158 void OPPROTO op_movl_eflags_T0(void);
 159 void OPPROTO op_movl_T0_eflags(void);
 160 void raise_interrupt(int intno, int is_int, int error_code,
 161                      unsigned int next_eip);
 162 void raise_exception_err(int exception_index, int error_code);
 163 void raise_exception(int exception_index);
 164 void helper_divl_EAX_T0(uint32_t eip);
 165 void helper_idivl_EAX_T0(uint32_t eip);
 166 void helper_cmpxchg8b(void);
 167 void helper_cpuid(void);
 168 void helper_rdtsc(void);
 169 void helper_rdmsr(void);
 170 void helper_wrmsr(void);
 171 void helper_lsl(void);
 172 void helper_lar(void);
 173 void helper_verr(void);
 174 void helper_verw(void);
 175
 176 void check_iob_T0(void);
 177 void check_iow_T0(void);
 178 void check_iol_T0(void);
 179 void check_iob_DX(void);
 180 void check_iow_DX(void);
 181 void check_iol_DX(void);
 182
 183 /* XXX: move that to a generic header */
 184 #if !defined(CONFIG_USER_ONLY)
 185
 186 #define ldul_user ldl_user
 187 #define ldul_kernel ldl_kernel
 188
 189 #define ACCESS_TYPE 0
 190 #define MEMSUFFIX _kernel
 191 #define DATA_SIZE 1
 192 #include "softmmu_header.h"
 193
 194 #define DATA_SIZE 2
 195 #include "softmmu_header.h"
 196
 197 #define DATA_SIZE 4
 198 #include "softmmu_header.h"
 199
 200 #define DATA_SIZE 8
 201 #include "softmmu_header.h"
 202 #undef ACCESS_TYPE
 203 #undef MEMSUFFIX
 204
 205 #define ACCESS_TYPE 1
 206 #define MEMSUFFIX _user
 207 #define DATA_SIZE 1
 208 #include "softmmu_header.h"
 209
 210 #define DATA_SIZE 2
 211 #include "softmmu_header.h"
 212
 213 #define DATA_SIZE 4
 214 #include "softmmu_header.h"
 215
 216 #define DATA_SIZE 8
 217 #include "softmmu_header.h"
 218 #undef ACCESS_TYPE
 219 #undef MEMSUFFIX
 220
 221 /* these access are slower, they must be as rare as possible */
 222 #define ACCESS_TYPE 2
 223 #define MEMSUFFIX _data
 224 #define DATA_SIZE 1
 225 #include "softmmu_header.h"
 226
 227 #define DATA_SIZE 2
 228 #include "softmmu_header.h"
 229
 230 #define DATA_SIZE 4
 231 #include "softmmu_header.h"
 232
 233 #define DATA_SIZE 8
 234 #include "softmmu_header.h"
 235 #undef ACCESS_TYPE
 236 #undef MEMSUFFIX
 237
 238 #define ldub(p) ldub_data(p)
 239 #define ldsb(p) ldsb_data(p)
 240 #define lduw(p) lduw_data(p)
 241 #define ldsw(p) ldsw_data(p)
 242 #define ldl(p) ldl_data(p)
 243 #define ldq(p) ldq_data(p)
 244
 245 #define stb(p, v) stb_data(p, v)
 246 #define stw(p, v) stw_data(p, v)
 247 #define stl(p, v) stl_data(p, v)
 248 #define stq(p, v) stq_data(p, v)
 249
 250 static inline double ldfq(void *ptr)
 251 {
 252     union {
 253         double d;
 254         uint64_t i;
 255     } u;
 256     u.i = ldq(ptr);
 257     return u.d;
 258 }
 259
 260 static inline void stfq(void *ptr, double v)
 261 {
 262     union {
 263         double d;
 264         uint64_t i;
 265     } u;
 266     u.d = v;
 267     stq(ptr, u.i);
 268 }
 269
 270 static inline float ldfl(void *ptr)
 271 {
 272     union {
 273         float f;
 274         uint32_t i;
 275     } u;
 276     u.i = ldl(ptr);
 277     return u.f;
 278 }
 279
 280 static inline void stfl(void *ptr, float v)
 281 {
 282     union {
 283         float f;
 284         uint32_t i;
 285     } u;
 286     u.f = v;
 287     stl(ptr, u.i);
 288 }
 289
 290 #endif /* !defined(CONFIG_USER_ONLY) */
 291
 292 #ifdef USE_X86LDOUBLE
 293 /* use long double functions */
 294 #define lrint lrintl
 295 #define llrint llrintl
 296 #define fabs fabsl
 297 #define sin sinl
 298 #define cos cosl
 299 #define sqrt sqrtl
 300 #define pow powl
 301 #define log logl
 302 #define tan tanl
 303 #define atan2 atan2l
 304 #define floor floorl
 305 #define ceil ceill
 306 #define rint rintl
 307 #endif
 308
 309 extern int lrint(CPU86_LDouble x);
 310 extern int64_t llrint(CPU86_LDouble x);
 311 extern CPU86_LDouble fabs(CPU86_LDouble x);
 312 extern CPU86_LDouble sin(CPU86_LDouble x);
 313 extern CPU86_LDouble cos(CPU86_LDouble x);
 314 extern CPU86_LDouble sqrt(CPU86_LDouble x);
 315 extern CPU86_LDouble pow(CPU86_LDouble, CPU86_LDouble);
 316 extern CPU86_LDouble log(CPU86_LDouble x);
 317 extern CPU86_LDouble tan(CPU86_LDouble x);
 318 extern CPU86_LDouble atan2(CPU86_LDouble, CPU86_LDouble);
 319 extern CPU86_LDouble floor(CPU86_LDouble x);
 320 extern CPU86_LDouble ceil(CPU86_LDouble x);
 321 extern CPU86_LDouble rint(CPU86_LDouble x);
 322
 323 #define RC_MASK         0xc00
 324 #define RC_NEAR         0x000
 325 #define RC_DOWN         0x400
 326 #define RC_UP           0x800
 327 #define RC_CHOP         0xc00
 328
 329 #define MAXTAN 9223372036854775808.0
 330
 331 #ifdef __arm__
 332 /* we have no way to do correct rounding - a FPU emulator is needed */
 333 #define FE_DOWNWARD   FE_TONEAREST
 334 #define FE_UPWARD     FE_TONEAREST
 335 #define FE_TOWARDZERO FE_TONEAREST
 336 #endif
 337
 338 #ifdef USE_X86LDOUBLE
 339
 340 /* only for x86 */
 341 typedef union {
 342     long double d;
 343     struct {
 344         unsigned long long lower;
 345         unsigned short upper;
 346     } l;
 347 } CPU86_LDoubleU;
 348
 349 /* the following deal with x86 long double-precision numbers */
 350 #define MAXEXPD 0x7fff
 351 #define EXPBIAS 16383
 352 #define EXPD(fp)        (fp.l.upper & 0x7fff)
 353 #define SIGND(fp)       ((fp.l.upper) & 0x8000)
 354 #define MANTD(fp)       (fp.l.lower)
 355 #define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7fff)) | EXPBIAS
 356
 357 #else
 358
 359 /* NOTE: arm is horrible as double 32 bit words are stored in big endian ! */
 360 typedef union {
 361     double d;
 362 #if !defined(WORDS_BIGENDIAN) && !defined(__arm__)
 363     struct {
 364         uint32_t lower;
 365         int32_t upper;
 366     } l;
 367 #else
 368     struct {
 369         int32_t upper;
 370         uint32_t lower;
 371     } l;
 372 #endif
 373 #ifndef __arm__
 374     int64_t ll;
 375 #endif
 376 } CPU86_LDoubleU;
 377
 378 /* the following deal with IEEE double-precision numbers */
 379 #define MAXEXPD 0x7ff
 380 #define EXPBIAS 1023
 381 #define EXPD(fp)        (((fp.l.upper) >> 20) & 0x7FF)
 382 #define SIGND(fp)       ((fp.l.upper) & 0x80000000)
 383 #ifdef __arm__
 384 #define MANTD(fp)       (fp.l.lower | ((uint64_t)(fp.l.upper & ((1 << 20) - 1)) << 32))
 385 #else
 386 #define MANTD(fp)       (fp.ll & ((1LL << 52) - 1))
 387 #endif
 388 #define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7ff << 20)) | (EXPBIAS << 20)
 389 #endif
 390
 391 static inline void fpush(void)
 392 {
 393     env->fpstt = (env->fpstt - 1) & 7;
 394     env->fptags[env->fpstt] = 0; /* validate stack entry */
 395 }
 396
 397 static inline void fpop(void)
 398 {
 399     env->fptags[env->fpstt] = 1; /* invvalidate stack entry */
 400     env->fpstt = (env->fpstt + 1) & 7;
 401 }
 402
 403 #ifndef USE_X86LDOUBLE
 404 static inline CPU86_LDouble helper_fldt(uint8_t *ptr)
 405 {
 406     CPU86_LDoubleU temp;
 407     int upper, e;
 408     uint64_t ll;
 409
 410     /* mantissa */
 411     upper = lduw(ptr + 8);
 412     /* XXX: handle overflow ? */
 413     e = (upper & 0x7fff) - 16383 + EXPBIAS; /* exponent */
 414     e |= (upper >> 4) & 0x800; /* sign */
 415     ll = (ldq(ptr) >> 11) & ((1LL << 52) - 1);
 416 #ifdef __arm__
 417     temp.l.upper = (e << 20) | (ll >> 32);
 418     temp.l.lower = ll;
 419 #else
 420     temp.ll = ll | ((uint64_t)e << 52);
 421 #endif
 422     return temp.d;
 423 }
 424
 425 static inline void helper_fstt(CPU86_LDouble f, uint8_t *ptr)
 426 {
 427     CPU86_LDoubleU temp;
 428     int e;
 429
 430     temp.d = f;
 431     /* mantissa */
 432     stq(ptr, (MANTD(temp) << 11) | (1LL << 63));
 433     /* exponent + sign */
 434     e = EXPD(temp) - EXPBIAS + 16383;
 435     e |= SIGND(temp) >> 16;
 436     stw(ptr + 8, e);
 437 }
 438 #else
 439
 440 /* XXX: same endianness assumed */
 441
 442 #ifdef CONFIG_USER_ONLY
 443
 444 static inline CPU86_LDouble helper_fldt(uint8_t *ptr)
 445 {
 446     return *(CPU86_LDouble *)ptr;
 447 }
 448
 449 static inline void helper_fstt(CPU86_LDouble f, uint8_t *ptr)
 450 {
 451     *(CPU86_LDouble *)ptr = f;
 452 }
 453
 454 #else
 455
 456 /* we use memory access macros */
 457
 458 static inline CPU86_LDouble helper_fldt(uint8_t *ptr)
 459 {
 460     CPU86_LDoubleU temp;
 461
 462     temp.l.lower = ldq(ptr);
 463     temp.l.upper = lduw(ptr + 8);
 464     return temp.d;
 465 }
 466
 467 static inline void helper_fstt(CPU86_LDouble f, uint8_t *ptr)
 468 {
 469     CPU86_LDoubleU temp;
 470
 471     temp.d = f;
 472     stq(ptr, temp.l.lower);
 473     stw(ptr + 8, temp.l.upper);
 474 }
 475
 476 #endif /* !CONFIG_USER_ONLY */
 477
 478 #endif /* USE_X86LDOUBLE */
 479
 480 const CPU86_LDouble f15rk[7];
 481
 482 void helper_fldt_ST0_A0(void);
 483 void helper_fstt_ST0_A0(void);
 484 void helper_fbld_ST0_A0(void);
 485 void helper_fbst_ST0_A0(void);
 486 void helper_f2xm1(void);
 487 void helper_fyl2x(void);
 488 void helper_fptan(void);
 489 void helper_fpatan(void);
 490 void helper_fxtract(void);
 491 void helper_fprem1(void);
 492 void helper_fprem(void);
 493 void helper_fyl2xp1(void);
 494 void helper_fsqrt(void);
 495 void helper_fsincos(void);
 496 void helper_frndint(void);
 497 void helper_fscale(void);
 498 void helper_fsin(void);
 499 void helper_fcos(void);
 500 void helper_fxam_ST0(void);
 501 void helper_fstenv(uint8_t *ptr, int data32);
 502 void helper_fldenv(uint8_t *ptr, int data32);
 503 void helper_fsave(uint8_t *ptr, int data32);
 504 void helper_frstor(uint8_t *ptr, int data32);
 505
 506 const uint8_t parity_table[256];
 507 const uint8_t rclw_table[32];
 508 const uint8_t rclb_table[32];
 509
 510 static inline uint32_t compute_eflags(void)
 511 {
 512     return env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK);
 513 }
 514
 515 /* NOTE: CC_OP must be modified manually to CC_OP_EFLAGS */
 516 static inline void load_eflags(int eflags, int update_mask)
 517 {
 518     CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
 519     DF = 1 - (2 * ((eflags >> 10) & 1));
 520     env->eflags = (env->eflags & ~update_mask) |
 521         (eflags & update_mask);
 522 }
 523