C++ (Cpp) write_RMW_virtual_word示例

示例#1

文件： arith16.cpp 项目： hack477/bochs4wii

void BX_CPP_AttrRegparmN(1) BX_CPU_C::CMPXCHG_EwGwM(bxInstruction_c *i)
{
#if BX_CPU_LEVEL >= 4
  Bit16u op1_16, op2_16, diff_16;

  BX_CPU_CALL_METHODR(i->ResolveModrm, (i));

  op1_16 = read_RMW_virtual_word(i->seg(), RMAddr(i));
  diff_16 = AX - op1_16;
  SET_FLAGS_OSZAPC_SUB_16(AX, op1_16, diff_16);

  if (diff_16 == 0) {  // if accumulator == dest
    // dest <-- src
    op2_16 = BX_READ_16BIT_REG(i->nnn());
    write_RMW_virtual_word(op2_16);
  }
  else {
    // accumulator <-- dest
    AX = op1_16;
  }
#else
  BX_INFO(("CMPXCHG_EwGw: not supported for cpu-level <= 3"));
  UndefinedOpcode(i);
#endif
}

示例#2

文件： arith16.cpp 项目： hack477/bochs4wii

void BX_CPP_AttrRegparmN(1) BX_CPU_C::XADD_EwGwM(bxInstruction_c *i)
{
#if BX_CPU_LEVEL >= 4
  Bit16u op1_16, op2_16, sum_16;

  /* XADD dst(r/m), src(r)
   * temp <-- src + dst         | sum = op2 + op1
   * src  <-- dst               | op2 = op1
   * dst  <-- tmp               | op1 = sum
   */

  BX_CPU_CALL_METHODR(i->ResolveModrm, (i));

  op1_16 = read_RMW_virtual_word(i->seg(), RMAddr(i));
  op2_16 = BX_READ_16BIT_REG(i->nnn());
  sum_16 = op1_16 + op2_16;
  write_RMW_virtual_word(sum_16);

  /* and write destination into source */
  BX_WRITE_16BIT_REG(i->nnn(), op1_16);

  SET_FLAGS_OSZAPC_ADD_16(op1_16, op2_16, sum_16);
#else
  BX_INFO(("XADD_EwGw: not supported on < 80486"));
  UndefinedOpcode(i);
#endif
}

示例#3

文件： data_xfer16.cpp 项目： hack477/bochs4wii

void BX_CPP_AttrRegparmN(1) BX_CPU_C::XCHG_EwGwM(bxInstruction_c *i)
{
  Bit16u op1_16, op2_16;

  BX_CPU_CALL_METHODR(i->ResolveModrm, (i));

  op1_16 = read_RMW_virtual_word(i->seg(), RMAddr(i));
  op2_16 = BX_READ_16BIT_REG(i->nnn());

  write_RMW_virtual_word(op2_16);
  BX_WRITE_16BIT_REG(i->nnn(), op1_16);
}

示例#4

文件： arith16.cpp 项目： iver6/BA

BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::DEC_EwM(bxInstruction_c *i)
{
    bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));

    Bit32u op1_16 = read_RMW_virtual_word(i->seg(), eaddr);
    op1_16--;
    write_RMW_virtual_word(op1_16);

    SET_FLAGS_OSZAP_SUB_16(op1_16 + 1, 0, op1_16);

    BX_NEXT_INSTR(i);
}

示例#5

文件： arith16.cpp 项目： hack477/bochs4wii

void BX_CPP_AttrRegparmN(1) BX_CPU_C::DEC_EwM(bxInstruction_c *i)
{
  Bit16u op1_16;

  BX_CPU_CALL_METHODR(i->ResolveModrm, (i));

  op1_16 = read_RMW_virtual_word(i->seg(), RMAddr(i));
  op1_16--;
  write_RMW_virtual_word(op1_16);

  SET_FLAGS_OSZAPC_DEC_16(op1_16);
}

示例#6

文件： arith16.cpp 项目： hack477/bochs4wii

void BX_CPP_AttrRegparmN(1) BX_CPU_C::NEG_EwM(bxInstruction_c *i)
{
  Bit16u op1_16;

  BX_CPU_CALL_METHODR(i->ResolveModrm, (i));

  op1_16 = read_RMW_virtual_word(i->seg(), RMAddr(i));
  op1_16 = - (Bit16s)(op1_16);
  write_RMW_virtual_word(op1_16);

  SET_FLAGS_OSZAPC_RESULT_16(op1_16, BX_LF_INSTR_NEG16);
}

示例#7

文件： arith16.cpp 项目： hack477/bochs4wii

void BX_CPP_AttrRegparmN(1) BX_CPU_C::SUB_EwIwM(bxInstruction_c *i)
{
  Bit16u op1_16, op2_16 = i->Iw(), diff_16;

  BX_CPU_CALL_METHODR(i->ResolveModrm, (i));

  op1_16 = read_RMW_virtual_word(i->seg(), RMAddr(i));
  diff_16 = op1_16 - op2_16;
  write_RMW_virtual_word(diff_16);

  SET_FLAGS_OSZAPC_SUB_16(op1_16, op2_16, diff_16);
}

示例#8

文件： arith16.cpp 项目： hack477/bochs4wii

void BX_CPP_AttrRegparmN(1) BX_CPU_C::ADC_EwIwM(bxInstruction_c *i)
{
  bx_bool temp_CF = getB_CF();
  Bit16u op1_16, op2_16 = i->Iw(), sum_16;

  BX_CPU_CALL_METHODR(i->ResolveModrm, (i));

  op1_16 = read_RMW_virtual_word(i->seg(), RMAddr(i));
  sum_16 = op1_16 + op2_16 + temp_CF;
  write_RMW_virtual_word(sum_16);

  SET_FLAGS_OSZAPC_16(op1_16, op2_16, sum_16, BX_LF_INSTR_ADD_ADC16(temp_CF));
}

示例#9

文件： arith16.cpp 项目： hack477/bochs4wii

void BX_CPP_AttrRegparmN(1) BX_CPU_C::ADD_EwGwM(bxInstruction_c *i)
{
  Bit16u op1_16, op2_16, sum_16;

  BX_CPU_CALL_METHODR(i->ResolveModrm, (i));

  op1_16 = read_RMW_virtual_word(i->seg(), RMAddr(i));
  op2_16 = BX_READ_16BIT_REG(i->nnn());
  sum_16 = op1_16 + op2_16;
  write_RMW_virtual_word(sum_16);

  SET_FLAGS_OSZAPC_ADD_16(op1_16, op2_16, sum_16);
}

示例#10

文件： arith16.cpp 项目： iver6/BA

BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::ADC_EwGwM(bxInstruction_c *i)
{
    bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));

    Bit32u op1_16 = read_RMW_virtual_word(i->seg(), eaddr);
    Bit32u op2_16 = BX_READ_16BIT_REG(i->nnn());
    Bit32u sum_16 = op1_16 + op2_16 + getB_CF();

    write_RMW_virtual_word(sum_16);

    SET_FLAGS_OSZAPC_ADD_16(op1_16, op2_16, sum_16);

    BX_NEXT_INSTR(i);
}

示例#11

文件： arith16.cpp 项目： iver6/BA

BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::SUB_EwIwM(bxInstruction_c *i)
{
    bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));

    Bit32u op1_16 = read_RMW_virtual_word(i->seg(), eaddr);
    Bit32u op2_16 = i->Iw();
    Bit32u diff_16 = op1_16 - op2_16;

    write_RMW_virtual_word(diff_16);

    SET_FLAGS_OSZAPC_SUB_16(op1_16, op2_16, diff_16);

    BX_NEXT_INSTR(i);
}

示例#12

文件： arith16.cpp 项目： hack477/bochs4wii

void BX_CPP_AttrRegparmN(1) BX_CPU_C::SBB_EwGwM(bxInstruction_c *i)
{
  Bit16u op1_16, op2_16, diff_16;
  bx_bool temp_CF = getB_CF();

  BX_CPU_CALL_METHODR(i->ResolveModrm, (i));

  op1_16 = read_RMW_virtual_word(i->seg(), RMAddr(i));
  op2_16 = BX_READ_16BIT_REG(i->nnn());
  diff_16 = op1_16 - (op2_16 + temp_CF);
  write_RMW_virtual_word(diff_16);

  SET_FLAGS_OSZAPC_16(op1_16, op2_16, diff_16, BX_LF_INSTR_SUB_SBB16(temp_CF));
}

示例#13

文件： arith16.cpp 项目： iver6/BA

BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::CMPXCHG_EwGwM(bxInstruction_c *i)
{
    bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));

    Bit16u op1_16 = read_RMW_virtual_word(i->seg(), eaddr);
    Bit16u diff_16 = AX - op1_16;

    SET_FLAGS_OSZAPC_SUB_16(AX, op1_16, diff_16);

    if (diff_16 == 0) {  // if accumulator == dest
        // dest <-- src
        write_RMW_virtual_word(BX_READ_16BIT_REG(i->nnn()));
    }
    else {
        // accumulator <-- dest
        AX = op1_16;
    }

    BX_NEXT_INSTR(i);
}

示例#14

文件： arith16.cpp 项目： iver6/BA

BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::XADD_EwGwM(bxInstruction_c *i)
{
    /* XADD dst(r/m), src(r)
     * temp <-- src + dst         | sum = op2 + op1
     * src  <-- dst               | op2 = op1
     * dst  <-- tmp               | op1 = sum
     */

    bx_address eaddr = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));

    Bit32u op1_16 = read_RMW_virtual_word(i->seg(), eaddr);
    Bit32u op2_16 = BX_READ_16BIT_REG(i->nnn());
    Bit32u sum_16 = op1_16 + op2_16;

    write_RMW_virtual_word(sum_16);

    /* and write destination into source */
    BX_WRITE_16BIT_REG(i->nnn(), op1_16);

    SET_FLAGS_OSZAPC_ADD_16(op1_16, op2_16, sum_16);

    BX_NEXT_INSTR(i);
}