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