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 /* XXX: factorize this mess */
  24 #ifdef TARGET_X86_64
  25 #define TARGET_LONG_BITS 64
  26 #else
  27 #define TARGET_LONG_BITS 32
  28 #endif
  29
  30 #include "cpu-defs.h"
  31
  32 register struct CPUX86State *env asm(AREG0);
  33
  34 #include "qemu-log.h"
  35
  36 #define EAX (env->regs[R_EAX])
  37 #define ECX (env->regs[R_ECX])
  38 #define EDX (env->regs[R_EDX])
  39 #define EBX (env->regs[R_EBX])
  40 #define ESP (env->regs[R_ESP])
  41 #define EBP (env->regs[R_EBP])
  42 #define ESI (env->regs[R_ESI])
  43 #define EDI (env->regs[R_EDI])
  44 #define EIP (env->eip)
  45 #define DF  (env->df)
  46
  47 #define CC_SRC (env->cc_src)
  48 #define CC_DST (env->cc_dst)
  49 #define CC_OP  (env->cc_op)
  50
  51 /* float macros */
  52 #define FT0    (env->ft0)
  53 #define ST0    (env->fpregs[env->fpstt].d)
  54 #define ST(n)  (env->fpregs[(env->fpstt + (n)) & 7].d)
  55 #define ST1    ST(1)
  56
  57 #include "cpu.h"
  58 #include "exec-all.h"
  59
  60 void cpu_x86_update_cr3(CPUX86State *env, target_ulong new_cr3);
  61 void cpu_x86_update_cr4(CPUX86State *env, uint32_t new_cr4);
  62 int cpu_x86_handle_mmu_fault(CPUX86State *env, target_ulong addr,
  63                              int is_write, int mmu_idx, int is_softmmu);
  64 void __hidden cpu_lock(void);
  65 void __hidden cpu_unlock(void);
  66 void do_interrupt(int intno, int is_int, int error_code,
  67                   target_ulong next_eip, int is_hw);
  68 void do_interrupt_user(int intno, int is_int, int error_code,
  69                        target_ulong next_eip);
  70 void raise_interrupt(int intno, int is_int, int error_code,
  71                      int next_eip_addend);
  72 void raise_exception_err(int exception_index, int error_code);
  73 void raise_exception(int exception_index);
  74 void do_smm_enter(void);
  75 void __hidden cpu_loop_exit(void);
  76
  77 /* n must be a constant to be efficient */
  78 static inline target_long lshift(target_long x, int n)
  79 {
  80     if (n >= 0)
  81         return x << n;
  82     else
  83         return x >> (-n);
  84 }
  85
  86 #include "helper.h"
  87
  88 static inline void svm_check_intercept(uint32_t type)
  89 {
  90     helper_svm_check_intercept_param(type, 0);
  91 }
  92
  93 #if !defined(CONFIG_USER_ONLY)
  94
  95 #include "softmmu_exec.h"
  96
  97 #endif /* !defined(CONFIG_USER_ONLY) */
  98
  99 #ifdef USE_X86LDOUBLE
 100 /* use long double functions */
 101 #define floatx_to_int32 floatx80_to_int32
 102 #define floatx_to_int64 floatx80_to_int64
 103 #define floatx_to_int32_round_to_zero floatx80_to_int32_round_to_zero
 104 #define floatx_to_int64_round_to_zero floatx80_to_int64_round_to_zero
 105 #define int32_to_floatx int32_to_floatx80
 106 #define int64_to_floatx int64_to_floatx80
 107 #define float32_to_floatx float32_to_floatx80
 108 #define float64_to_floatx float64_to_floatx80
 109 #define floatx_to_float32 floatx80_to_float32
 110 #define floatx_to_float64 floatx80_to_float64
 111 #define floatx_abs floatx80_abs
 112 #define floatx_chs floatx80_chs
 113 #define floatx_round_to_int floatx80_round_to_int
 114 #define floatx_compare floatx80_compare
 115 #define floatx_compare_quiet floatx80_compare_quiet
 116 #else
 117 #define floatx_to_int32 float64_to_int32
 118 #define floatx_to_int64 float64_to_int64
 119 #define floatx_to_int32_round_to_zero float64_to_int32_round_to_zero
 120 #define floatx_to_int64_round_to_zero float64_to_int64_round_to_zero
 121 #define int32_to_floatx int32_to_float64
 122 #define int64_to_floatx int64_to_float64
 123 #define float32_to_floatx float32_to_float64
 124 #define float64_to_floatx(x, e) (x)
 125 #define floatx_to_float32 float64_to_float32
 126 #define floatx_to_float64(x, e) (x)
 127 #define floatx_abs float64_abs
 128 #define floatx_chs float64_chs
 129 #define floatx_round_to_int float64_round_to_int
 130 #define floatx_compare float64_compare
 131 #define floatx_compare_quiet float64_compare_quiet
 132 #endif
 133
 134 #define RC_MASK         0xc00
 135 #define RC_NEAR         0x000
 136 #define RC_DOWN         0x400
 137 #define RC_UP           0x800
 138 #define RC_CHOP         0xc00
 139
 140 #define MAXTAN 9223372036854775808.0
 141
 142 #ifdef USE_X86LDOUBLE
 143
 144 /* only for x86 */
 145 typedef union {
 146     long double d;
 147     struct {
 148         unsigned long long lower;
 149         unsigned short upper;
 150     } l;
 151 } CPU86_LDoubleU;
 152
 153 /* the following deal with x86 long double-precision numbers */
 154 #define MAXEXPD 0x7fff
 155 #define EXPBIAS 16383
 156 #define EXPD(fp)        (fp.l.upper & 0x7fff)
 157 #define SIGND(fp)       ((fp.l.upper) & 0x8000)
 158 #define MANTD(fp)       (fp.l.lower)
 159 #define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7fff)) | EXPBIAS
 160
 161 #else
 162
 163 /* NOTE: arm is horrible as double 32 bit words are stored in big endian ! */
 164 typedef union {
 165     double d;
 166 #if !defined(WORDS_BIGENDIAN) && !defined(__arm__)
 167     struct {
 168         uint32_t lower;
 169         int32_t upper;
 170     } l;
 171 #else
 172     struct {
 173         int32_t upper;
 174         uint32_t lower;
 175     } l;
 176 #endif
 177 #ifndef __arm__
 178     int64_t ll;
 179 #endif
 180 } CPU86_LDoubleU;
 181
 182 /* the following deal with IEEE double-precision numbers */
 183 #define MAXEXPD 0x7ff
 184 #define EXPBIAS 1023
 185 #define EXPD(fp)        (((fp.l.upper) >> 20) & 0x7FF)
 186 #define SIGND(fp)       ((fp.l.upper) & 0x80000000)
 187 #ifdef __arm__
 188 #define MANTD(fp)       (fp.l.lower | ((uint64_t)(fp.l.upper & ((1 << 20) - 1)) << 32))
 189 #else
 190 #define MANTD(fp)       (fp.ll & ((1LL << 52) - 1))
 191 #endif
 192 #define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7ff << 20)) | (EXPBIAS << 20)
 193 #endif
 194
 195 static inline void fpush(void)
 196 {
 197     env->fpstt = (env->fpstt - 1) & 7;
 198     env->fptags[env->fpstt] = 0; /* validate stack entry */
 199 }
 200
 201 static inline void fpop(void)
 202 {
 203     env->fptags[env->fpstt] = 1; /* invvalidate stack entry */
 204     env->fpstt = (env->fpstt + 1) & 7;
 205 }
 206
 207 #ifndef USE_X86LDOUBLE
 208 static inline CPU86_LDouble helper_fldt(target_ulong ptr)
 209 {
 210     CPU86_LDoubleU temp;
 211     int upper, e;
 212     uint64_t ll;
 213
 214     /* mantissa */
 215     upper = lduw(ptr + 8);
 216     /* XXX: handle overflow ? */
 217     e = (upper & 0x7fff) - 16383 + EXPBIAS; /* exponent */
 218     e |= (upper >> 4) & 0x800; /* sign */
 219     ll = (ldq(ptr) >> 11) & ((1LL << 52) - 1);
 220 #ifdef __arm__
 221     temp.l.upper = (e << 20) | (ll >> 32);
 222     temp.l.lower = ll;
 223 #else
 224     temp.ll = ll | ((uint64_t)e << 52);
 225 #endif
 226     return temp.d;
 227 }
 228
 229 static inline void helper_fstt(CPU86_LDouble f, target_ulong ptr)
 230 {
 231     CPU86_LDoubleU temp;
 232     int e;
 233
 234     temp.d = f;
 235     /* mantissa */
 236     stq(ptr, (MANTD(temp) << 11) | (1LL << 63));
 237     /* exponent + sign */
 238     e = EXPD(temp) - EXPBIAS + 16383;
 239     e |= SIGND(temp) >> 16;
 240     stw(ptr + 8, e);
 241 }
 242 #else
 243
 244 /* we use memory access macros */
 245
 246 static inline CPU86_LDouble helper_fldt(target_ulong ptr)
 247 {
 248     CPU86_LDoubleU temp;
 249
 250     temp.l.lower = ldq(ptr);
 251     temp.l.upper = lduw(ptr + 8);
 252     return temp.d;
 253 }
 254
 255 static inline void helper_fstt(CPU86_LDouble f, target_ulong ptr)
 256 {
 257     CPU86_LDoubleU temp;
 258
 259     temp.d = f;
 260     stq(ptr, temp.l.lower);
 261     stw(ptr + 8, temp.l.upper);
 262 }
 263
 264 #endif /* USE_X86LDOUBLE */
 265
 266 #define FPUS_IE (1 << 0)
 267 #define FPUS_DE (1 << 1)
 268 #define FPUS_ZE (1 << 2)
 269 #define FPUS_OE (1 << 3)
 270 #define FPUS_UE (1 << 4)
 271 #define FPUS_PE (1 << 5)
 272 #define FPUS_SF (1 << 6)
 273 #define FPUS_SE (1 << 7)
 274 #define FPUS_B  (1 << 15)
 275
 276 #define FPUC_EM 0x3f
 277
 278 extern const CPU86_LDouble f15rk[7];
 279
 280 void fpu_raise_exception(void);
 281 void restore_native_fp_state(CPUState *env);
 282 void save_native_fp_state(CPUState *env);
 283
 284 extern const uint8_t parity_table[256];
 285 extern const uint8_t rclw_table[32];
 286 extern const uint8_t rclb_table[32];
 287
 288 static inline uint32_t compute_eflags(void)
 289 {
 290     return env->eflags | helper_cc_compute_all(CC_OP) | (DF & DF_MASK);
 291 }
 292
 293 /* NOTE: CC_OP must be modified manually to CC_OP_EFLAGS */
 294 static inline void load_eflags(int eflags, int update_mask)
 295 {
 296     CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
 297     DF = 1 - (2 * ((eflags >> 10) & 1));
 298     env->eflags = (env->eflags & ~update_mask) |
 299         (eflags & update_mask) | 0x2;
 300 }
 301
 302 static inline void env_to_regs(void)
 303 {
 304 #ifdef reg_EAX
 305     EAX = env->regs[R_EAX];
 306 #endif
 307 #ifdef reg_ECX
 308     ECX = env->regs[R_ECX];
 309 #endif
 310 #ifdef reg_EDX
 311     EDX = env->regs[R_EDX];
 312 #endif
 313 #ifdef reg_EBX
 314     EBX = env->regs[R_EBX];
 315 #endif
 316 #ifdef reg_ESP
 317     ESP = env->regs[R_ESP];
 318 #endif
 319 #ifdef reg_EBP
 320     EBP = env->regs[R_EBP];
 321 #endif
 322 #ifdef reg_ESI
 323     ESI = env->regs[R_ESI];
 324 #endif
 325 #ifdef reg_EDI
 326     EDI = env->regs[R_EDI];
 327 #endif
 328 }
 329
 330 static inline void regs_to_env(void)
 331 {
 332 #ifdef reg_EAX
 333     env->regs[R_EAX] = EAX;
 334 #endif
 335 #ifdef reg_ECX
 336     env->regs[R_ECX] = ECX;
 337 #endif
 338 #ifdef reg_EDX
 339     env->regs[R_EDX] = EDX;
 340 #endif
 341 #ifdef reg_EBX
 342     env->regs[R_EBX] = EBX;
 343 #endif
 344 #ifdef reg_ESP
 345     env->regs[R_ESP] = ESP;
 346 #endif
 347 #ifdef reg_EBP
 348     env->regs[R_EBP] = EBP;
 349 #endif
 350 #ifdef reg_ESI
 351     env->regs[R_ESI] = ESI;
 352 #endif
 353 #ifdef reg_EDI
 354     env->regs[R_EDI] = EDI;
 355 #endif
 356 }
 357
 358 static inline int cpu_halted(CPUState *env) {
 359     /* handle exit of HALTED state */
 360     if (!env->halted)
 361         return 0;
 362     /* disable halt condition */
 363     if (((env->interrupt_request & CPU_INTERRUPT_HARD) &&
 364          (env->eflags & IF_MASK)) ||
 365         (env->interrupt_request & CPU_INTERRUPT_NMI)) {
 366         env->halted = 0;
 367         return 0;
 368     }
 369     return EXCP_HALTED;
 370 }
 371
 372 /* load efer and update the corresponding hflags. XXX: do consistency
 373    checks with cpuid bits ? */
 374 static inline void cpu_load_efer(CPUState *env, uint64_t val)
 375 {
 376     env->efer = val;
 377     env->hflags &= ~(HF_LMA_MASK | HF_SVME_MASK);
 378     if (env->efer & MSR_EFER_LMA)
 379         env->hflags |= HF_LMA_MASK;
 380     if (env->efer & MSR_EFER_SVME)
 381         env->hflags |= HF_SVME_MASK;
 382 }