Archipelago » qemu

/*

 *  i386 execution defines 

 *

 *  Copyright (c) 2003 Fabrice Bellard

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

#include "dyngen-exec.h"

/* at least 4 register variables are defines */

register struct CPUX86State *env asm(AREG0);

register uint32_t T0 asm(AREG1);

register uint32_t T1 asm(AREG2);

register uint32_t T2 asm(AREG3);

#define A0 T2

/* if more registers are available, we define some registers too */

#ifdef AREG4

register uint32_t EAX asm(AREG4);

#define reg_EAX

#endif

#ifdef AREG5

register uint32_t ESP asm(AREG5);

#define reg_ESP

#endif

#ifdef AREG6

register uint32_t EBP asm(AREG6);

#define reg_EBP

#endif

#ifdef AREG7

register uint32_t ECX asm(AREG7);

#define reg_ECX

#endif

#ifdef AREG8

register uint32_t EDX asm(AREG8);

#define reg_EDX

#endif

#ifdef AREG9

register uint32_t EBX asm(AREG9);

#define reg_EBX

#endif

#ifdef AREG10

register uint32_t ESI asm(AREG10);

#define reg_ESI

#endif

#ifdef AREG11

register uint32_t EDI asm(AREG11);

#define reg_EDI

#endif

extern FILE *logfile;

extern int loglevel;

#ifndef reg_EAX

#define EAX (env->regs[R_EAX])

#endif

#ifndef reg_ECX

#define ECX (env->regs[R_ECX])

#endif

#ifndef reg_EDX

#define EDX (env->regs[R_EDX])

#endif

#ifndef reg_EBX

#define EBX (env->regs[R_EBX])

#endif

#ifndef reg_ESP

#define ESP (env->regs[R_ESP])

#endif

#ifndef reg_EBP

#define EBP (env->regs[R_EBP])

#endif

#ifndef reg_ESI

#define ESI (env->regs[R_ESI])

#endif

#ifndef reg_EDI

#define EDI (env->regs[R_EDI])

#endif

#define EIP  (env->eip)

#define DF  (env->df)

#define CC_SRC (env->cc_src)

#define CC_DST (env->cc_dst)

#define CC_OP  (env->cc_op)

/* float macros */

#define FT0    (env->ft0)

#define ST0    (env->fpregs[env->fpstt])

#define ST(n)  (env->fpregs[(env->fpstt + (n)) & 7])

#define ST1    ST(1)

#ifdef USE_FP_CONVERT

#define FP_CONVERT  (env->fp_convert)

#endif

#include "cpu-i386.h"

#include "exec.h"

typedef struct CCTable {

    int (*compute_all)(void); /* return all the flags */

    int (*compute_c)(void);  /* return the C flag */

} CCTable;

extern CCTable cc_table[];

void load_seg(int seg_reg, int selector, unsigned cur_eip);

void jmp_seg(int selector, unsigned int new_eip);

void helper_iret_protected(int shift);

void helper_lldt_T0(void);

void helper_ltr_T0(void);

void helper_movl_crN_T0(int reg);

void helper_movl_drN_T0(int reg);

void helper_invlpg(unsigned int addr);

void cpu_x86_update_cr0(CPUX86State *env);

void cpu_x86_update_cr3(CPUX86State *env);

void cpu_x86_flush_tlb(CPUX86State *env, uint32_t addr);

int cpu_x86_handle_mmu_fault(CPUX86State *env, uint32_t addr, int is_write);

void __hidden cpu_lock(void);

void __hidden cpu_unlock(void);

void do_interrupt(int intno, int is_int, int error_code, 

                  unsigned int next_eip);

void do_interrupt_user(int intno, int is_int, int error_code, 

                       unsigned int next_eip);

void raise_interrupt(int intno, int is_int, int error_code, 

                     unsigned int next_eip);

void raise_exception_err(int exception_index, int error_code);

void raise_exception(int exception_index);

void __hidden cpu_loop_exit(void);

void helper_fsave(uint8_t *ptr, int data32);

void helper_frstor(uint8_t *ptr, int data32);

void OPPROTO op_movl_eflags_T0(void);

void OPPROTO op_movl_T0_eflags(void);

void raise_interrupt(int intno, int is_int, int error_code, 

                     unsigned int next_eip);

void raise_exception_err(int exception_index, int error_code);

void raise_exception(int exception_index);

void helper_divl_EAX_T0(uint32_t eip);

void helper_idivl_EAX_T0(uint32_t eip);

void helper_cmpxchg8b(void);

void helper_cpuid(void);

void helper_rdtsc(void);

void helper_rdmsr(void);

void helper_wrmsr(void);

void helper_lsl(void);

void helper_lar(void);

#ifdef USE_X86LDOUBLE

/* use long double functions */

#define lrint lrintl

#define llrint llrintl

#define fabs fabsl

#define sin sinl

#define cos cosl

#define sqrt sqrtl

#define pow powl

#define log logl

#define tan tanl

#define atan2 atan2l

#define floor floorl

#define ceil ceill

#define rint rintl

#endif

extern int lrint(CPU86_LDouble x);

extern int64_t llrint(CPU86_LDouble x);

extern CPU86_LDouble fabs(CPU86_LDouble x);

extern CPU86_LDouble sin(CPU86_LDouble x);

extern CPU86_LDouble cos(CPU86_LDouble x);

extern CPU86_LDouble sqrt(CPU86_LDouble x);

extern CPU86_LDouble pow(CPU86_LDouble, CPU86_LDouble);

extern CPU86_LDouble log(CPU86_LDouble x);

extern CPU86_LDouble tan(CPU86_LDouble x);

extern CPU86_LDouble atan2(CPU86_LDouble, CPU86_LDouble);

extern CPU86_LDouble floor(CPU86_LDouble x);

extern CPU86_LDouble ceil(CPU86_LDouble x);

extern CPU86_LDouble rint(CPU86_LDouble x);

#define RC_MASK         0xc00

#define RC_NEAR                0x000

#define RC_DOWN                0x400

#define RC_UP                0x800

#define RC_CHOP                0xc00

#define MAXTAN 9223372036854775808.0

#ifdef __arm__

/* we have no way to do correct rounding - a FPU emulator is needed */

#define FE_DOWNWARD   FE_TONEAREST

#define FE_UPWARD     FE_TONEAREST

#define FE_TOWARDZERO FE_TONEAREST

#endif

#ifdef USE_X86LDOUBLE

/* only for x86 */

typedef union {

    long double d;

    struct {

        unsigned long long lower;

        unsigned short upper;

    } l;

} CPU86_LDoubleU;

/* the following deal with x86 long double-precision numbers */

#define MAXEXPD 0x7fff

#define EXPBIAS 16383

#define EXPD(fp)        (fp.l.upper & 0x7fff)

#define SIGND(fp)        ((fp.l.upper) & 0x8000)

#define MANTD(fp)       (fp.l.lower)

#define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7fff)) | EXPBIAS

#else

/* NOTE: arm is horrible as double 32 bit words are stored in big endian ! */

typedef union {

    double d;

#if !defined(WORDS_BIGENDIAN) && !defined(__arm__)

    struct {

        uint32_t lower;

        int32_t upper;

    } l;

#else

    struct {

        int32_t upper;

        uint32_t lower;

    } l;

#endif

#ifndef __arm__

    int64_t ll;

#endif

} CPU86_LDoubleU;

/* the following deal with IEEE double-precision numbers */

#define MAXEXPD 0x7ff

#define EXPBIAS 1023

#define EXPD(fp)        (((fp.l.upper) >> 20) & 0x7FF)

#define SIGND(fp)        ((fp.l.upper) & 0x80000000)

#ifdef __arm__

#define MANTD(fp)        (fp.l.lower | ((uint64_t)(fp.l.upper & ((1 << 20) - 1)) << 32))

#else

#define MANTD(fp)        (fp.ll & ((1LL << 52) - 1))

#endif

#define BIASEXPONENT(fp) fp.l.upper = (fp.l.upper & ~(0x7ff << 20)) | (EXPBIAS << 20)

#endif

static inline void fpush(void)

{

    env->fpstt = (env->fpstt - 1) & 7;

    env->fptags[env->fpstt] = 0; /* validate stack entry */

}

static inline void fpop(void)

{

    env->fptags[env->fpstt] = 1; /* invvalidate stack entry */

    env->fpstt = (env->fpstt + 1) & 7;

}

#ifndef USE_X86LDOUBLE

static inline CPU86_LDouble helper_fldt(uint8_t *ptr)

{

    CPU86_LDoubleU temp;

    int upper, e;

    uint64_t ll;

    /* mantissa */

    upper = lduw(ptr + 8);

    /* XXX: handle overflow ? */

    e = (upper & 0x7fff) - 16383 + EXPBIAS; /* exponent */

    e |= (upper >> 4) & 0x800; /* sign */

    ll = (ldq(ptr) >> 11) & ((1LL << 52) - 1);

#ifdef __arm__

    temp.l.upper = (e << 20) | (ll >> 32);

    temp.l.lower = ll;

#else

    temp.ll = ll | ((uint64_t)e << 52);

#endif

    return temp.d;

}

static inline void helper_fstt(CPU86_LDouble f, uint8_t *ptr)

{

    CPU86_LDoubleU temp;

    int e;

    temp.d = f;

    /* mantissa */

    stq(ptr, (MANTD(temp) << 11) | (1LL << 63));

    /* exponent + sign */

    e = EXPD(temp) - EXPBIAS + 16383;

    e |= SIGND(temp) >> 16;

    stw(ptr + 8, e);

}

#endif

const CPU86_LDouble f15rk[7];

void helper_fldt_ST0_A0(void);

void helper_fstt_ST0_A0(void);

void helper_fbld_ST0_A0(void);

void helper_fbst_ST0_A0(void);

void helper_f2xm1(void);

void helper_fyl2x(void);

void helper_fptan(void);

void helper_fpatan(void);

void helper_fxtract(void);

void helper_fprem1(void);

void helper_fprem(void);

void helper_fyl2xp1(void);

void helper_fsqrt(void);

void helper_fsincos(void);

void helper_frndint(void);

void helper_fscale(void);

void helper_fsin(void);

void helper_fcos(void);

void helper_fxam_ST0(void);

void helper_fstenv(uint8_t *ptr, int data32);

void helper_fldenv(uint8_t *ptr, int data32);

void helper_fsave(uint8_t *ptr, int data32);

void helper_frstor(uint8_t *ptr, int data32);

const uint8_t parity_table[256];

const uint8_t rclw_table[32];

const uint8_t rclb_table[32];

static inline uint32_t compute_eflags(void)

{

    return env->eflags | cc_table[CC_OP].compute_all() | (DF & DF_MASK);

}

#define FL_UPDATE_MASK32 (TF_MASK | AC_MASK | ID_MASK)

#define FL_UPDATE_CPL0_MASK (TF_MASK | IF_MASK | IOPL_MASK | NT_MASK | \

                             RF_MASK | AC_MASK | ID_MASK)

/* NOTE: CC_OP must be modified manually to CC_OP_EFLAGS */

static inline void load_eflags(int eflags, int update_mask)

{

    CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);

    DF = 1 - (2 * ((eflags >> 10) & 1));

    env->eflags = (env->eflags & ~update_mask) | 

        (eflags & update_mask);

}