gwj / at91sam9263 · Files

/*
 *  i386 micro operations
 * 
 *  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 "exec-i386.h"

/* n must be a constant to be efficient */
static inline int lshift(int x, int n)

{

    if (n >= 0)
        return x << n;
    else
        return x >> (-n);

}

/* we define the various pieces of code used by the JIT */

#define REG EAX
#define REGNAME _EAX
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG ECX
#define REGNAME _ECX
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG EDX
#define REGNAME _EDX
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG EBX
#define REGNAME _EBX
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG ESP
#define REGNAME _ESP
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG EBP
#define REGNAME _EBP
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG ESI
#define REGNAME _ESI
#include "opreg_template.h"
#undef REG
#undef REGNAME

#define REG EDI
#define REGNAME _EDI
#include "opreg_template.h"
#undef REG
#undef REGNAME

/* operations with flags */

void OPPROTO op_addl_T0_T1_cc(void)
{
    CC_SRC = T0;
    T0 += T1;
    CC_DST = T0;
}

void OPPROTO op_orl_T0_T1_cc(void)
{
    T0 |= T1;
    CC_DST = T0;
}

void OPPROTO op_andl_T0_T1_cc(void)
{
    T0 &= T1;
    CC_DST = T0;
}

void OPPROTO op_subl_T0_T1_cc(void)
{
    CC_SRC = T0;
    T0 -= T1;
    CC_DST = T0;
}

void OPPROTO op_xorl_T0_T1_cc(void)
{
    T0 ^= T1;
    CC_DST = T0;
}

void OPPROTO op_cmpl_T0_T1_cc(void)
{
    CC_SRC = T0;
    CC_DST = T0 - T1;
}

void OPPROTO op_negl_T0_cc(void)
{
    CC_SRC = 0;
    T0 = -T0;
    CC_DST = T0;
}

void OPPROTO op_incl_T0_cc(void)
{

    CC_SRC = cc_table[CC_OP].compute_c();

    T0++;
    CC_DST = T0;
}

void OPPROTO op_decl_T0_cc(void)
{

    CC_SRC = cc_table[CC_OP].compute_c();

    T0--;
    CC_DST = T0;
}

void OPPROTO op_testl_T0_T1_cc(void)
{
    CC_DST = T0 & T1;
}

/* operations without flags */

void OPPROTO op_addl_T0_T1(void)
{
    T0 += T1;
}

void OPPROTO op_orl_T0_T1(void)
{
    T0 |= T1;
}

void OPPROTO op_andl_T0_T1(void)
{
    T0 &= T1;
}

void OPPROTO op_subl_T0_T1(void)
{
    T0 -= T1;
}

void OPPROTO op_xorl_T0_T1(void)
{
    T0 ^= T1;
}

void OPPROTO op_negl_T0(void)
{
    T0 = -T0;
}

void OPPROTO op_incl_T0(void)
{
    T0++;
}

void OPPROTO op_decl_T0(void)
{
    T0--;
}

void OPPROTO op_notl_T0(void)
{
    T0 = ~T0;
}

void OPPROTO op_bswapl_T0(void)
{
    T0 = bswap32(T0);
}

/* multiply/divide */
void OPPROTO op_mulb_AL_T0(void)
{
    unsigned int res;
    res = (uint8_t)EAX * (uint8_t)T0;
    EAX = (EAX & 0xffff0000) | res;
    CC_SRC = (res & 0xff00);
}

void OPPROTO op_imulb_AL_T0(void)
{
    int res;
    res = (int8_t)EAX * (int8_t)T0;
    EAX = (EAX & 0xffff0000) | (res & 0xffff);
    CC_SRC = (res != (int8_t)res);
}

void OPPROTO op_mulw_AX_T0(void)
{
    unsigned int res;
    res = (uint16_t)EAX * (uint16_t)T0;
    EAX = (EAX & 0xffff0000) | (res & 0xffff);
    EDX = (EDX & 0xffff0000) | ((res >> 16) & 0xffff);
    CC_SRC = res >> 16;
}

void OPPROTO op_imulw_AX_T0(void)
{
    int res;
    res = (int16_t)EAX * (int16_t)T0;
    EAX = (EAX & 0xffff0000) | (res & 0xffff);
    EDX = (EDX & 0xffff0000) | ((res >> 16) & 0xffff);
    CC_SRC = (res != (int16_t)res);
}

void OPPROTO op_mull_EAX_T0(void)
{
    uint64_t res;
    res = (uint64_t)((uint32_t)EAX) * (uint64_t)((uint32_t)T0);
    EAX = res;
    EDX = res >> 32;
    CC_SRC = res >> 32;
}

void OPPROTO op_imull_EAX_T0(void)
{
    int64_t res;
    res = (int64_t)((int32_t)EAX) * (int64_t)((int32_t)T0);
    EAX = res;
    EDX = res >> 32;
    CC_SRC = (res != (int32_t)res);
}

void OPPROTO op_imulw_T0_T1(void)
{
    int res;
    res = (int16_t)T0 * (int16_t)T1;
    T0 = res;
    CC_SRC = (res != (int16_t)res);
}

void OPPROTO op_imull_T0_T1(void)
{
    int64_t res;

    res = (int64_t)((int32_t)T0) * (int64_t)((int32_t)T1);

    T0 = res;
    CC_SRC = (res != (int32_t)res);
}

/* division, flags are undefined */

/* XXX: add exceptions for overflow */

void OPPROTO op_divb_AL_T0(void)
{
    unsigned int num, den, q, r;

    num = (EAX & 0xffff);
    den = (T0 & 0xff);

    if (den == 0) {
        EIP = PARAM1;

        raise_exception(EXCP00_DIVZ);

    }

    q = (num / den) & 0xff;
    r = (num % den) & 0xff;
    EAX = (EAX & 0xffff0000) | (r << 8) | q;
}

void OPPROTO op_idivb_AL_T0(void)
{
    int num, den, q, r;

    num = (int16_t)EAX;
    den = (int8_t)T0;

    if (den == 0) {
        EIP = PARAM1;

        raise_exception(EXCP00_DIVZ);

    }

    q = (num / den) & 0xff;
    r = (num % den) & 0xff;
    EAX = (EAX & 0xffff0000) | (r << 8) | q;
}

void OPPROTO op_divw_AX_T0(void)
{
    unsigned int num, den, q, r;

    num = (EAX & 0xffff) | ((EDX & 0xffff) << 16);
    den = (T0 & 0xffff);

    if (den == 0) {
        EIP = PARAM1;

        raise_exception(EXCP00_DIVZ);

    }

    q = (num / den) & 0xffff;
    r = (num % den) & 0xffff;
    EAX = (EAX & 0xffff0000) | q;
    EDX = (EDX & 0xffff0000) | r;
}

void OPPROTO op_idivw_AX_T0(void)
{
    int num, den, q, r;

    num = (EAX & 0xffff) | ((EDX & 0xffff) << 16);
    den = (int16_t)T0;

    if (den == 0) {
        EIP = PARAM1;

        raise_exception(EXCP00_DIVZ);

    }

    q = (num / den) & 0xffff;
    r = (num % den) & 0xffff;
    EAX = (EAX & 0xffff0000) | q;
    EDX = (EDX & 0xffff0000) | r;
}

void OPPROTO op_divl_EAX_T0(void)
{

    helper_divl_EAX_T0(PARAM1);

}

void OPPROTO op_idivl_EAX_T0(void)
{

    helper_idivl_EAX_T0(PARAM1);

}

/* constant load & misc op */

void OPPROTO op_movl_T0_im(void)

{
    T0 = PARAM1;
}

void OPPROTO op_addl_T0_im(void)
{
    T0 += PARAM1;
}

void OPPROTO op_andl_T0_ffff(void)
{
    T0 = T0 & 0xffff;
}

void OPPROTO op_movl_T0_T1(void)
{
    T0 = T1;
}

void OPPROTO op_movl_T1_im(void)

{
    T1 = PARAM1;
}

void OPPROTO op_addl_T1_im(void)
{
    T1 += PARAM1;
}

void OPPROTO op_movl_T1_A0(void)
{
    T1 = A0;
}

void OPPROTO op_movl_A0_im(void)

{
    A0 = PARAM1;
}

void OPPROTO op_addl_A0_im(void)
{
    A0 += PARAM1;
}

void OPPROTO op_addl_A0_AL(void)
{
    A0 += (EAX & 0xff);
}

void OPPROTO op_andl_A0_ffff(void)
{
    A0 = A0 & 0xffff;
}

/* memory access */

void OPPROTO op_ldub_T0_A0(void)
{
    T0 = ldub((uint8_t *)A0);
}

void OPPROTO op_ldsb_T0_A0(void)
{
    T0 = ldsb((int8_t *)A0);
}

void OPPROTO op_lduw_T0_A0(void)
{
    T0 = lduw((uint8_t *)A0);
}

void OPPROTO op_ldsw_T0_A0(void)
{
    T0 = ldsw((int8_t *)A0);
}

void OPPROTO op_ldl_T0_A0(void)
{
    T0 = ldl((uint8_t *)A0);
}

void OPPROTO op_ldub_T1_A0(void)
{
    T1 = ldub((uint8_t *)A0);
}

void OPPROTO op_ldsb_T1_A0(void)
{
    T1 = ldsb((int8_t *)A0);
}

void OPPROTO op_lduw_T1_A0(void)
{
    T1 = lduw((uint8_t *)A0);
}

void OPPROTO op_ldsw_T1_A0(void)
{
    T1 = ldsw((int8_t *)A0);
}

void OPPROTO op_ldl_T1_A0(void)
{
    T1 = ldl((uint8_t *)A0);
}

void OPPROTO op_stb_T0_A0(void)
{
    stb((uint8_t *)A0, T0);
}

void OPPROTO op_stw_T0_A0(void)
{
    stw((uint8_t *)A0, T0);
}

void OPPROTO op_stl_T0_A0(void)
{
    stl((uint8_t *)A0, T0);
}

/* used for bit operations */

void OPPROTO op_add_bitw_A0_T1(void)
{
    A0 += ((int32_t)T1 >> 4) << 1;
}

void OPPROTO op_add_bitl_A0_T1(void)
{
    A0 += ((int32_t)T1 >> 5) << 2;
}

/* indirect jump */

void OPPROTO op_jmp_T0(void)
{

    EIP = T0;

}

void OPPROTO op_jmp_im(void)
{

    EIP = PARAM1;

}

void OPPROTO op_raise_interrupt(void)

{

    int intno;

    unsigned int next_eip;

    intno = PARAM1;

    next_eip = PARAM2;
    raise_interrupt(intno, 1, 0, next_eip);

}

void OPPROTO op_raise_exception(void)

{

    int exception_index;
    exception_index = PARAM1;
    raise_exception(exception_index);

}

void OPPROTO op_into(void)
{
    int eflags;
    eflags = cc_table[CC_OP].compute_all();
    if (eflags & CC_O) {

        raise_interrupt(EXCP04_INTO, 1, 0, PARAM1);

    }

    FORCE_RET();

}

void OPPROTO op_cli(void)
{
    env->eflags &= ~IF_MASK;
}

void OPPROTO op_sti(void)
{

    env->eflags |= IF_MASK;

}

#if 0

/* vm86plus instructions */
void OPPROTO op_cli_vm(void)
{
    env->eflags &= ~VIF_MASK;
}

void OPPROTO op_sti_vm(void)
{
    env->eflags |= VIF_MASK;
    if (env->eflags & VIP_MASK) {
        EIP = PARAM1;
        raise_exception(EXCP0D_GPF);
    }
    FORCE_RET();
}

#endif

void OPPROTO op_boundw(void)
{
    int low, high, v;
    low = ldsw((uint8_t *)A0);
    high = ldsw((uint8_t *)A0 + 2);
    v = (int16_t)T0;

    if (v < low || v > high) {
        EIP = PARAM1;

        raise_exception(EXCP05_BOUND);

    }

    FORCE_RET();
}

void OPPROTO op_boundl(void)
{
    int low, high, v;
    low = ldl((uint8_t *)A0);
    high = ldl((uint8_t *)A0 + 4);
    v = T0;

    if (v < low || v > high) {
        EIP = PARAM1;

        raise_exception(EXCP05_BOUND);

    }

    FORCE_RET();
}

void OPPROTO op_cmpxchg8b(void)
{

    helper_cmpxchg8b();

}

void OPPROTO op_jmp_tb_next(void)
{
    JUMP_TB(PARAM1, 0, PARAM2);
}

void OPPROTO op_movl_T0_0(void)
{
    T0 = 0;
}

/* multiple size ops */

#define ldul ldl

#define SHIFT 0

#include "ops_template.h"

#undef SHIFT

#define SHIFT 1

#include "ops_template.h"

#undef SHIFT

#define SHIFT 2

#include "ops_template.h"

#undef SHIFT

/* sign extend */

void OPPROTO op_movsbl_T0_T0(void)
{
    T0 = (int8_t)T0;
}

void OPPROTO op_movzbl_T0_T0(void)
{
    T0 = (uint8_t)T0;
}

void OPPROTO op_movswl_T0_T0(void)
{
    T0 = (int16_t)T0;
}

void OPPROTO op_movzwl_T0_T0(void)
{
    T0 = (uint16_t)T0;
}

void OPPROTO op_movswl_EAX_AX(void)
{
    EAX = (int16_t)EAX;
}

void OPPROTO op_movsbw_AX_AL(void)
{
    EAX = (EAX & 0xffff0000) | ((int8_t)EAX & 0xffff);
}

void OPPROTO op_movslq_EDX_EAX(void)
{
    EDX = (int32_t)EAX >> 31;
}

void OPPROTO op_movswl_DX_AX(void)
{
    EDX = (EDX & 0xffff0000) | (((int16_t)EAX >> 15) & 0xffff);
}

/* push/pop */

void op_pushl_T0(void)
{
    uint32_t offset;
    offset = ESP - 4;
    stl((void *)offset, T0);
    /* modify ESP after to handle exceptions correctly */
    ESP = offset;
}

void op_pushw_T0(void)
{
    uint32_t offset;
    offset = ESP - 2;
    stw((void *)offset, T0);
    /* modify ESP after to handle exceptions correctly */
    ESP = offset;
}

void op_pushl_ss32_T0(void)

{
    uint32_t offset;
    offset = ESP - 4;

    stl(env->seg_cache[R_SS].base + offset, T0);
    /* modify ESP after to handle exceptions correctly */
    ESP = offset;
}

void op_pushw_ss32_T0(void)
{
    uint32_t offset;
    offset = ESP - 2;
    stw(env->seg_cache[R_SS].base + offset, T0);

    /* modify ESP after to handle exceptions correctly */
    ESP = offset;
}

void op_pushl_ss16_T0(void)
{
    uint32_t offset;
    offset = (ESP - 4) & 0xffff;
    stl(env->seg_cache[R_SS].base + offset, T0);
    /* modify ESP after to handle exceptions correctly */
    ESP = (ESP & ~0xffff) | offset;
}

void op_pushw_ss16_T0(void)
{
    uint32_t offset;
    offset = (ESP - 2) & 0xffff;
    stw(env->seg_cache[R_SS].base + offset, T0);
    /* modify ESP after to handle exceptions correctly */
    ESP = (ESP & ~0xffff) | offset;
}

/* NOTE: ESP update is done after */

void op_popl_T0(void)
{
    T0 = ldl((void *)ESP);

}

void op_popw_T0(void)
{
    T0 = lduw((void *)ESP);
}

void op_popl_ss32_T0(void)
{
    T0 = ldl(env->seg_cache[R_SS].base + ESP);
}

void op_popw_ss32_T0(void)
{
    T0 = lduw(env->seg_cache[R_SS].base + ESP);
}

void op_popl_ss16_T0(void)
{
    T0 = ldl(env->seg_cache[R_SS].base + (ESP & 0xffff));
}

void op_popw_ss16_T0(void)
{
    T0 = lduw(env->seg_cache[R_SS].base + (ESP & 0xffff));
}

void op_addl_ESP_4(void)
{

    ESP += 4;
}

void op_addl_ESP_2(void)
{
    ESP += 2;
}

void op_addw_ESP_4(void)
{
    ESP = (ESP & ~0xffff) | ((ESP + 4) & 0xffff);
}

void op_addw_ESP_2(void)
{
    ESP = (ESP & ~0xffff) | ((ESP + 2) & 0xffff);
}

void op_addl_ESP_im(void)
{
    ESP += PARAM1;
}

void op_addw_ESP_im(void)
{
    ESP = (ESP & ~0xffff) | ((ESP + PARAM1) & 0xffff);

}

void OPPROTO op_rdtsc(void)

{

    helper_rdtsc();

}

void OPPROTO op_cpuid(void)
{
    helper_cpuid();
}

/* bcd */

/* XXX: exception */
void OPPROTO op_aam(void)
{
    int base = PARAM1;
    int al, ah;
    al = EAX & 0xff;
    ah = al / base;
    al = al % base;
    EAX = (EAX & ~0xffff) | al | (ah << 8);
    CC_DST = al;
}

void OPPROTO op_aad(void)
{
    int base = PARAM1;
    int al, ah;
    al = EAX & 0xff;
    ah = (EAX >> 8) & 0xff;
    al = ((ah * base) + al) & 0xff;
    EAX = (EAX & ~0xffff) | al;
    CC_DST = al;
}

void OPPROTO op_aaa(void)
{
    int icarry;
    int al, ah, af;
    int eflags;

    eflags = cc_table[CC_OP].compute_all();
    af = eflags & CC_A;
    al = EAX & 0xff;
    ah = (EAX >> 8) & 0xff;

    icarry = (al > 0xf9);
    if (((al & 0x0f) > 9 ) || af) {
        al = (al + 6) & 0x0f;
        ah = (ah + 1 + icarry) & 0xff;
        eflags |= CC_C | CC_A;
    } else {
        eflags &= ~(CC_C | CC_A);
        al &= 0x0f;
    }
    EAX = (EAX & ~0xffff) | al | (ah << 8);
    CC_SRC = eflags;
}

void OPPROTO op_aas(void)
{
    int icarry;
    int al, ah, af;
    int eflags;

    eflags = cc_table[CC_OP].compute_all();
    af = eflags & CC_A;
    al = EAX & 0xff;
    ah = (EAX >> 8) & 0xff;

    icarry = (al < 6);
    if (((al & 0x0f) > 9 ) || af) {
        al = (al - 6) & 0x0f;
        ah = (ah - 1 - icarry) & 0xff;
        eflags |= CC_C | CC_A;
    } else {
        eflags &= ~(CC_C | CC_A);
        al &= 0x0f;
    }
    EAX = (EAX & ~0xffff) | al | (ah << 8);
    CC_SRC = eflags;
}

void OPPROTO op_daa(void)
{
    int al, af, cf;
    int eflags;

    eflags = cc_table[CC_OP].compute_all();
    cf = eflags & CC_C;
    af = eflags & CC_A;
    al = EAX & 0xff;

    eflags = 0;
    if (((al & 0x0f) > 9 ) || af) {
        al = (al + 6) & 0xff;
        eflags |= CC_A;
    }
    if ((al > 0x9f) || cf) {
        al = (al + 0x60) & 0xff;
        eflags |= CC_C;
    }
    EAX = (EAX & ~0xff) | al;
    /* well, speed is not an issue here, so we compute the flags by hand */
    eflags |= (al == 0) << 6; /* zf */
    eflags |= parity_table[al]; /* pf */
    eflags |= (al & 0x80); /* sf */
    CC_SRC = eflags;
}

void OPPROTO op_das(void)
{
    int al, al1, af, cf;
    int eflags;

    eflags = cc_table[CC_OP].compute_all();
    cf = eflags & CC_C;
    af = eflags & CC_A;
    al = EAX & 0xff;

    eflags = 0;
    al1 = al;
    if (((al & 0x0f) > 9 ) || af) {
        eflags |= CC_A;
        if (al < 6 || cf)
            eflags |= CC_C;
        al = (al - 6) & 0xff;
    }
    if ((al1 > 0x99) || cf) {
        al = (al - 0x60) & 0xff;
        eflags |= CC_C;
    }
    EAX = (EAX & ~0xff) | al;
    /* well, speed is not an issue here, so we compute the flags by hand */
    eflags |= (al == 0) << 6; /* zf */
    eflags |= parity_table[al]; /* pf */
    eflags |= (al & 0x80); /* sf */
    CC_SRC = eflags;
}

/* segment handling */

void OPPROTO op_movl_seg_T0(void)
{

    load_seg(PARAM1, T0 & 0xffff, PARAM2);
}

/* faster VM86 version */
void OPPROTO op_movl_seg_T0_vm(void)
{
    int selector;

    selector = T0 & 0xffff;
    /* env->segs[] access */
    *(uint32_t *)((char *)env + PARAM1) = selector;
    /* env->seg_cache[] access */
    ((SegmentCache *)((char *)env + PARAM2))->base = (void *)(selector << 4);

}

void OPPROTO op_movl_T0_seg(void)
{
    T0 = env->segs[PARAM1];
}

void OPPROTO op_movl_A0_seg(void)
{
    A0 = *(unsigned long *)((char *)env + PARAM1);
}

void OPPROTO op_addl_A0_seg(void)
{
    A0 += *(unsigned long *)((char *)env + PARAM1);
}

void OPPROTO op_lsl(void)
{
    helper_lsl();
}

void OPPROTO op_lar(void)
{
    helper_lar();
}

/* flags handling */

/* slow jumps cases : in order to avoid calling a function with a
   pointer (which can generate a stack frame on PowerPC), we use
   op_setcc to set T0 and then call op_jcc. */
void OPPROTO op_jcc(void)

{

    if (T0)
        JUMP_TB(PARAM1, 0, PARAM2);

    else

        JUMP_TB(PARAM1, 1, PARAM3);

    FORCE_RET();

}

/* slow set cases (compute x86 flags) */
void OPPROTO op_seto_T0_cc(void)
{
    int eflags;
    eflags = cc_table[CC_OP].compute_all();
    T0 = (eflags >> 11) & 1;
}

void OPPROTO op_setb_T0_cc(void)
{
    T0 = cc_table[CC_OP].compute_c();
}

void OPPROTO op_setz_T0_cc(void)
{
    int eflags;
    eflags = cc_table[CC_OP].compute_all();
    T0 = (eflags >> 6) & 1;
}

void OPPROTO op_setbe_T0_cc(void)
{
    int eflags;
    eflags = cc_table[CC_OP].compute_all();
    T0 = (eflags & (CC_Z | CC_C)) != 0;
}

void OPPROTO op_sets_T0_cc(void)
{
    int eflags;
    eflags = cc_table[CC_OP].compute_all();
    T0 = (eflags >> 7) & 1;
}

void OPPROTO op_setp_T0_cc(void)
{
    int eflags;
    eflags = cc_table[CC_OP].compute_all();
    T0 = (eflags >> 2) & 1;
}

void OPPROTO op_setl_T0_cc(void)
{
    int eflags;
    eflags = cc_table[CC_OP].compute_all();
    T0 = ((eflags ^ (eflags >> 4)) >> 7) & 1;
}

void OPPROTO op_setle_T0_cc(void)
{
    int eflags;
    eflags = cc_table[CC_OP].compute_all();
    T0 = (((eflags ^ (eflags >> 4)) & 0x80) || (eflags & CC_Z)) != 0;
}

void OPPROTO op_xor_T0_1(void)
{
    T0 ^= 1;
}

void OPPROTO op_set_cc_op(void)
{
    CC_OP = PARAM1;
}

#define FL_UPDATE_MASK32 (TF_MASK | AC_MASK | ID_MASK)
#define FL_UPDATE_MASK16 (TF_MASK)

void OPPROTO op_movl_eflags_T0(void)
{

    int eflags;
    eflags = T0;
    CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
    DF = 1 - (2 * ((eflags >> 10) & 1));
    /* we also update some system flags as in user mode */

    env->eflags = (env->eflags & ~FL_UPDATE_MASK32) | (eflags & FL_UPDATE_MASK32);
}

void OPPROTO op_movw_eflags_T0(void)
{
    int eflags;
    eflags = T0;
    CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
    DF = 1 - (2 * ((eflags >> 10) & 1));
    /* we also update some system flags as in user mode */
    env->eflags = (env->eflags & ~FL_UPDATE_MASK16) | (eflags & FL_UPDATE_MASK16);
}

#if 0
/* vm86plus version */

void OPPROTO op_movw_eflags_T0_vm(void)
{
    int eflags;
    eflags = T0;
    CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
    DF = 1 - (2 * ((eflags >> 10) & 1));
    /* we also update some system flags as in user mode */
    env->eflags = (env->eflags & ~(FL_UPDATE_MASK16 | VIF_MASK)) |
        (eflags & FL_UPDATE_MASK16);
    if (eflags & IF_MASK) {
        env->eflags |= VIF_MASK;
        if (env->eflags & VIP_MASK) {
            EIP = PARAM1;
            raise_exception(EXCP0D_GPF);
        }
    }
    FORCE_RET();
}

void OPPROTO op_movl_eflags_T0_vm(void)
{
    int eflags;
    eflags = T0;
    CC_SRC = eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
    DF = 1 - (2 * ((eflags >> 10) & 1));
    /* we also update some system flags as in user mode */
    env->eflags = (env->eflags & ~(FL_UPDATE_MASK32 | VIF_MASK)) |
        (eflags & FL_UPDATE_MASK32);
    if (eflags & IF_MASK) {
        env->eflags |= VIF_MASK;
        if (env->eflags & VIP_MASK) {
            EIP = PARAM1;
            raise_exception(EXCP0D_GPF);
        }
    }
    FORCE_RET();

}

#endif

/* XXX: compute only O flag */
void OPPROTO op_movb_eflags_T0(void)
{
    int of;
    of = cc_table[CC_OP].compute_all() & CC_O;

    CC_SRC = (T0 & (CC_S | CC_Z | CC_A | CC_P | CC_C)) | of;

}

void OPPROTO op_movl_T0_eflags(void)
{

    int eflags;
    eflags = cc_table[CC_OP].compute_all();
    eflags |= (DF & DF_MASK);
    eflags |= env->eflags & ~(VM_MASK | RF_MASK);
    T0 = eflags;