exec-i386.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-i386.h"
 116 #include "exec.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 jmp_seg(int selector, unsigned int new_eip);
 127 void helper_iret_protected(int shift);
 128 void helper_lldt_T0(void);
 129 void helper_ltr_T0(void);
 130 void helper_movl_crN_T0(int reg);
 131 void helper_movl_drN_T0(int reg);
 132 void helper_invlpg(unsigned int addr);
 133 void cpu_x86_update_cr0(CPUX86State *env);
 134 void cpu_x86_update_cr3(CPUX86State *env);
 135 void cpu_x86_flush_tlb(CPUX86State *env, uint32_t addr);
 136 int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr, int is_write);
 137 void __hidden cpu_lock(void);
 138 void __hidden cpu_unlock(void);
 139 void do_interrupt(int intno, int is_int, int error_code,
 140                   unsigned int next_eip);
 141 void do_interrupt_user(int intno, int is_int, int error_code,
 142                        unsigned int next_eip);
 143 void raise_interrupt(int intno, int is_int, int error_code,
 144                      unsigned int next_eip);
 145 void raise_exception_err(int exception_index, int error_code);
 146 void raise_exception(int exception_index);
 147 void __hidden cpu_loop_exit(void);
 148 void helper_fsave(uint8_t *ptr, int data32);
 149 void helper_frstor(uint8_t *ptr, int data32);
 150
 151 void OPPROTO op_movl_eflags_T0(void);
 152 void OPPROTO op_movl_T0_eflags(void);
 153 void raise_interrupt(int intno, int is_int, int error_code,
 154                      unsigned int next_eip);
 155 void raise_exception_err(int exception_index, int error_code);
 156 void raise_exception(int exception_index);
 157 void helper_divl_EAX_T0(uint32_t eip);
 158 void helper_idivl_EAX_T0(uint32_t eip);
 159 void helper_cmpxchg8b(void);
 160 void helper_cpuid(void);
 161 void helper_rdtsc(void);
 162 void helper_rdmsr(void);
 163 void helper_wrmsr(void);
 164 void helper_lsl(void);
 165 void helper_lar(void);
 166
 167 #ifdef USE_X86LDOUBLE
 168 /* use long double functions */
 169 #define lrint lrintl
 170 #define llrint llrintl
 171 #define fabs fabsl
 172 #define sin sinl
 173 #define cos cosl
 174 #define sqrt sqrtl
 175 #define pow powl
 176 #define log logl
 177 #define tan tanl
 178 #define atan2 atan2l
 179 #define floor floorl
 180 #define ceil ceill
 181 #define rint rintl
 182 #endif
 183
 184 extern int lrint(CPU86_LDouble x);
 185 extern int64_t llrint(CPU86_LDouble x);
 186 extern CPU86_LDouble fabs(CPU86_LDouble x);
 187 extern CPU86_LDouble sin(CPU86_LDouble x);
 188 extern CPU86_LDouble cos(CPU86_LDouble x);
 189 extern CPU86_LDouble sqrt(CPU86_LDouble x);
 190 extern CPU86_LDouble pow(CPU86_LDouble, CPU86_LDouble);
 191 extern CPU86_LDouble log(CPU86_LDouble x);
 192 extern CPU86_LDouble tan(CPU86_LDouble x);
 193 extern CPU86_LDouble atan2(CPU86_LDouble, CPU86_LDouble);
 194 extern CPU86_LDouble floor(CPU86_LDouble x);
 195 extern CPU86_LDouble ceil(CPU86_LDouble x);
 196 extern CPU86_LDouble rint(CPU86_LDouble x);
 197
 198 #define RC_MASK         0xc00
 199 #define RC_NEAR         0x000
 200 #define RC_DOWN         0x400
 201 #define RC_UP           0x800
 202 #define RC_CHOP         0xc00
 203
 204 #define MAXTAN 9223372036854775808.0
 205
 206 #ifdef __arm__
 207 /* we have no way to do correct rounding - a FPU emulator is needed */
 208 #define FE_DOWNWARD   FE_TONEAREST
 209 #define FE_UPWARD     FE_TONEAREST
 210 #define FE_TOWARDZERO FE_TONEAREST
 211 #endif
 212
 213 #ifdef USE_X86LDOUBLE
 214
 215 /* only for x86 */
 216 typedef union {
 217     long double d;
 218     struct {
 219         unsigned long long lower;
 220         unsigned short upper;
 221     } l;
 222 } CPU86_LDoubleU;
 223
 224 /* the following deal with x86 long double-precision numbers */
 225 #define MAXEXPD 0x7fff
 226 #define EXPBIAS 16383
 227 #define EXPD(fp)        (fp.l.upper & 0x7fff)
 228 #define SIGND(fp)       ((fp.l.upper) & 0x8000)
 229 #define MANTD(fp)       (fp.l.lower)
 230 #define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7fff)) | EXPBIAS
 231
 232 #else
 233
 234 /* NOTE: arm is horrible as double 32 bit words are stored in big endian ! */
 235 typedef union {
 236     double d;
 237 #if !defined(WORDS_BIGENDIAN) && !defined(__arm__)
 238     struct {
 239         uint32_t lower;
 240         int32_t upper;
 241     } l;
 242 #else
 243     struct {
 244         int32_t upper;
 245         uint32_t lower;
 246     } l;
 247 #endif
 248 #ifndef __arm__
 249     int64_t ll;
 250 #endif
 251 } CPU86_LDoubleU;
 252
 253 /* the following deal with IEEE double-precision numbers */
 254 #define MAXEXPD 0x7ff
 255 #define EXPBIAS 1023
 256 #define EXPD(fp)        (((fp.l.upper) >> 20) & 0x7FF)
 257 #define SIGND(fp)       ((fp.l.upper) & 0x80000000)
 258 #ifdef __arm__
 259 #define MANTD(fp)       (fp.l.lower | ((uint64_t)(fp.l.upper & ((1 << 20) - 1)) << 32))
 260 #else
 261 #define MANTD(fp)       (fp.ll & ((1LL << 52) - 1))
 262 #endif
 263 #define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7ff << 20)) | (EXPBIAS << 20)
 264 #endif
 265
 266 static inline void fpush(void)
 267 {
 268     env->fpstt = (env->fpstt - 1) & 7;
 269     env->fptags[env->fpstt] = 0; /* validate stack entry */
 270 }
 271
 272 static inline void fpop(void)
 273 {
 274     env->fptags[env->fpstt] = 1; /* invvalidate stack entry */
 275     env->fpstt = (env->fpstt + 1) & 7;
 276 }
 277
 278 #ifndef USE_X86LDOUBLE
 279 static inline CPU86_LDouble helper_fldt(uint8_t *ptr)
 280 {
 281     CPU86_LDoubleU temp;
 282     int upper, e;
 283     uint64_t ll;
 284
 285     /* mantissa */
 286     upper = lduw(ptr + 8);
 287     /* XXX: handle overflow ? */
 288     e = (upper & 0x7fff) - 16383 + EXPBIAS; /* exponent */
 289     e |= (upper >> 4) & 0x800; /* sign */
 290     ll = (ldq(ptr) >> 11) & ((1LL << 52) - 1);
 291 #ifdef __arm__
 292     temp.l.upper = (e << 20) | (ll >> 32);
 293     temp.l.lower = ll;
 294 #else
 295     temp.ll = ll | ((uint64_t)e << 52);
 296 #endif
 297     return temp.d;
 298 }
 299
 300 static inline void helper_fstt(CPU86_LDouble f, uint8_t *ptr)
 301 {
 302     CPU86_LDoubleU temp;
 303     int e;
 304
 305     temp.d = f;
 306     /* mantissa */
 307     stq(ptr, (MANTD(temp) << 11) | (1LL << 63));
 308     /* exponent + sign */
 309     e = EXPD(temp) - EXPBIAS + 16383;
 310     e |= SIGND(temp) >> 16;
 311     stw(ptr + 8, e);
 312 }
 313 #endif
 314
 315 const CPU86_LDouble f15rk[7];
 316
 317 void helper_fldt_ST0_A0(void);
 318 void helper_fstt_ST0_A0(void);
 319 void helper_fbld_ST0_A0(void);
 320 void helper_fbst_ST0_A0(void);
 321 void helper_f2xm1(void);
 322 void helper_fyl2x(void);
 323 void helper_fptan(void);
 324 void helper_fpatan(void);
 325 void helper_fxtract(void);
 326 void helper_fprem1(void);
 327 void helper_fprem(void);
 328 void helper_fyl2xp1(void);
 329 void helper_fsqrt(void);
 330 void helper_fsincos(void);
 331 void helper_frndint(void);
 332 void helper_fscale(void);
 333 void helper_fsin(void);
 334 void helper_fcos(void);
 335 void helper_fxam_ST0(void);
 336 void helper_fstenv(uint8_t *ptr, int data32);
 337 void helper_fldenv(uint8_t *ptr, int data32);
 338 void helper_fsave(uint8_t *ptr, int data32);
 339 void helper_frstor(uint8_t *ptr, int data32);
 340
 341 const uint8_t parity_table[256];
 342 const uint8_t rclw_table[32];
 343 const uint8_t rclb_table[32];
 344
 345 static inline uint32_t compute_eflags(void)
 346 {
 347     return env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK);
 348 }
 349
 350 #define FL_UPDATE_MASK32 (TF_MASK | AC_MASK | ID_MASK)
 351
 352 #define FL_UPDATE_CPL0_MASK (TF_MASK | IF_MASK | IOPL_MASK | NT_MASK | \
 353                              RF_MASK | AC_MASK | ID_MASK)
 354
 355 /* NOTE: CC_OP must be modified manually to CC_OP_EFLAGS */
 356 static inline void load_eflags(int eflags, int update_mask)
 357 {
 358     CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
 359     DF = 1 - (2 * ((eflags >> 10) & 1));
 360     env->eflags = (env->eflags & ~update_mask) |
 361         (eflags & update_mask);
 362 }