Esempi in C++ (Cpp) per BX_WRITE_FPU_REG

Esempio n. 1

File: fpu_compare.cpp Progetto: iver6/BA

BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FCMOV_ST0_STj(bxInstruction_c *i)
{
  BX_CPU_THIS_PTR prepareFPU(i);
  BX_CPU_THIS_PTR FPU_update_last_instruction(i);

  if (IS_TAG_EMPTY(0) || IS_TAG_EMPTY(i->rm()))
  {
     FPU_stack_underflow(0);
     BX_NEXT_INSTR(i);
  }

  floatx80 sti_reg = BX_READ_FPU_REG(i->rm());

  bx_bool condition = 0;
  switch(i->nnn() & 3)
  {
     case 0: condition = get_CF(); break;
     case 1: condition = get_ZF(); break;
     case 2: condition = get_CF() || get_ZF(); break;
     case 3: condition = get_PF(); break;
     default:
        BX_PANIC(("FCMOV_ST0_STj: default case"));
  }
  if (i->b1() & 1)
     condition = !condition;

  if (condition)
     BX_WRITE_FPU_REG(sti_reg, 0);

  BX_NEXT_INSTR(i);
}

Esempio n. 2

File: fpu_load_store.cpp Progetto: hack477/bochs4wii

void BX_CPP_AttrRegparmN(1) BX_CPU_C::FLD_STi(bxInstruction_c *i)
{
#if BX_SUPPORT_FPU
  BX_CPU_THIS_PTR prepareFPU(i);

  clear_C1();

  if (! IS_TAG_EMPTY(-1))
  {
    BX_CPU_THIS_PTR FPU_stack_overflow();
    return;
  }

  if (IS_TAG_EMPTY(i->rm()))
  {
    BX_CPU_THIS_PTR FPU_stack_underflow(0);
    return;
  }

  floatx80 sti_reg = BX_READ_FPU_REG(i->rm());

  BX_CPU_THIS_PTR the_i387.FPU_push();
  BX_WRITE_FPU_REG(sti_reg, 0);
#else
  BX_INFO(("FLD_STi: required FPU, configure --enable-fpu"));
#endif
}

Esempio n. 3

File: fpu_load_store.cpp Progetto: hack477/bochs4wii

void BX_CPP_AttrRegparmN(1) BX_CPU_C::FLD_DOUBLE_REAL(bxInstruction_c *i)
{
#if BX_SUPPORT_FPU
  BX_CPU_THIS_PTR prepareFPU(i);

  float64 load_reg = read_virtual_qword(i->seg(), RMAddr(i));

  clear_C1();

  if (! IS_TAG_EMPTY(-1)) {
    BX_CPU_THIS_PTR FPU_stack_overflow();
    return;
  }

  float_status_t status =
     FPU_pre_exception_handling(BX_CPU_THIS_PTR the_i387.get_control_word());

  // convert to floatx80 format
  floatx80 result = float64_to_floatx80(load_reg, status);

  if (BX_CPU_THIS_PTR FPU_exception(status.float_exception_flags))
    return;

  BX_CPU_THIS_PTR the_i387.FPU_push();
  BX_WRITE_FPU_REG(result, 0);
#else
  BX_INFO(("FLD_DOUBLE_REAL: required FPU, configure --enable-fpu"));
#endif
}

Esempio n. 4

File: fpu_load_store.cpp Progetto: iver6/BA

BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FLD_STi(bxInstruction_c *i)
{
  BX_CPU_THIS_PTR prepareFPU(i);
  FPU_update_last_instruction(i);

  clear_C1();

  if (! IS_TAG_EMPTY(-1))
  {
    FPU_stack_overflow();
    BX_NEXT_INSTR(i);
  }

  floatx80 sti_reg = floatx80_default_nan;

  if (IS_TAG_EMPTY(i->rm()))
  {
    FPU_exception(FPU_EX_Stack_Underflow);

    if (! BX_CPU_THIS_PTR the_i387.is_IA_masked()) 
      BX_NEXT_INSTR(i);
  }
  else {
    sti_reg = BX_READ_FPU_REG(i->rm());
  }

  BX_CPU_THIS_PTR the_i387.FPU_push();
  BX_WRITE_FPU_REG(sti_reg, 0);

  BX_NEXT_INSTR(i);
}

Esempio n. 5

File: fpu_load_store.cpp Progetto: hack477/bochs4wii

void BX_CPP_AttrRegparmN(1) BX_CPU_C::FST_STi(bxInstruction_c *i)
{
#if BX_SUPPORT_FPU
  BX_CPU_THIS_PTR prepareFPU(i);

  int pop_stack = i->nnn() & 1;
  // handle special case of FSTP opcode @ 0xDF 0xD0..D7
  if (i->b1() == 0xdf)
    pop_stack = 1;

  clear_C1();

  if (IS_TAG_EMPTY(0)) {
    BX_CPU_THIS_PTR FPU_stack_underflow(i->rm(), pop_stack);
    return;
  }

  floatx80 st0_reg = BX_READ_FPU_REG(0);

  BX_WRITE_FPU_REG(st0_reg, i->rm());
  if (pop_stack)
     BX_CPU_THIS_PTR the_i387.FPU_pop();
#else
  BX_INFO(("FST(P)_STi: required FPU, configure --enable-fpu"));
#endif
}

Esempio n. 6

File: fpu_load_store.cpp Progetto: iver6/BA

BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FLD_DOUBLE_REAL(bxInstruction_c *i)
{
  BX_CPU_THIS_PTR prepareFPU(i);

  RMAddr(i) = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
  float64 load_reg = read_virtual_qword(i->seg(), RMAddr(i));

  FPU_update_last_instruction(i);

  clear_C1();

  if (! IS_TAG_EMPTY(-1)) {
    FPU_stack_overflow();
    BX_NEXT_INSTR(i);
  }

  float_status_t status =
    FPU_pre_exception_handling(BX_CPU_THIS_PTR the_i387.get_control_word());

  // convert to floatx80 format
  floatx80 result = float64_to_floatx80(load_reg, status);

  unsigned unmasked = FPU_exception(status.float_exception_flags);
  if (! (unmasked & FPU_CW_Invalid)) {
    BX_CPU_THIS_PTR the_i387.FPU_push();
    BX_WRITE_FPU_REG(result, 0);
  }

  BX_NEXT_INSTR(i);
}

Esempio n. 7

File: fpu_load_store.cpp Progetto: iver6/BA

BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FST_STi(bxInstruction_c *i)
{
  BX_CPU_THIS_PTR prepareFPU(i);
  FPU_update_last_instruction(i);

  int pop_stack = i->nnn() & 1;
  // handle special case of FSTP opcode @ 0xDF 0xD0..D7
  if (i->b1() == 0xdf)
    pop_stack = 1;

  clear_C1();

  if (IS_TAG_EMPTY(0)) {
    FPU_stack_underflow(i->rm(), pop_stack);
  }
  else {
    floatx80 st0_reg = BX_READ_FPU_REG(0);

    BX_WRITE_FPU_REG(st0_reg, i->rm());
    if (pop_stack)
      BX_CPU_THIS_PTR the_i387.FPU_pop();
  }

  BX_NEXT_INSTR(i);
}

Esempio n. 8

File: ferr.cpp Progetto: iver6/BA

void BX_CPU_C::FPU_stack_overflow(void)
{
  /* The masked response */
  if (BX_CPU_THIS_PTR the_i387.is_IA_masked())
  {
    BX_CPU_THIS_PTR the_i387.FPU_push();
    BX_WRITE_FPU_REG(floatx80_default_nan, 0);
  }
  FPU_exception(FPU_EX_Stack_Overflow);
}

Esempio n. 9

File: ferr.cpp Progetto: iver6/BA

void BX_CPU_C::FPU_stack_underflow(int stnr, int pop_stack)
{
  /* The masked response */
  if (BX_CPU_THIS_PTR the_i387.is_IA_masked())
  {
    BX_WRITE_FPU_REG(floatx80_default_nan, stnr);
    if (pop_stack)
        BX_CPU_THIS_PTR the_i387.FPU_pop();
  }
  FPU_exception(FPU_EX_Stack_Underflow);
}

Esempio n. 10

File: fpu_const.cpp Progetto: hack477/bochs4wii

void BX_CPP_AttrRegparmN(1) BX_CPU_C::FLDPI(bxInstruction_c *i)
{
#if BX_SUPPORT_FPU
  BX_CPU_THIS_PTR prepareFPU(i);

  clear_C1();

  if (! IS_TAG_EMPTY(-1))
  {
      BX_CPU_THIS_PTR FPU_stack_overflow();
      return;
  }

  BX_CPU_THIS_PTR the_i387.FPU_push();
  BX_WRITE_FPU_REG(FPU_round_const(Const_PI, DOWN_OR_CHOP() ? -1 : 0), 0);
#else
  BX_INFO(("FLDPI: required FPU, configure --enable-fpu"));
#endif
}

Esempio n. 11

File: fpu_load_store.cpp Progetto: hack477/bochs4wii

/* DF /4 */
void BX_CPP_AttrRegparmN(1) BX_CPU_C::FBLD_PACKED_BCD(bxInstruction_c *i)
{
#if BX_SUPPORT_FPU
  BX_CPU_THIS_PTR prepareFPU(i);

  // read packed bcd from memory
  Bit16u hi2 = read_virtual_word (i->seg(), RMAddr(i) + 8);
  Bit64u lo8 = read_virtual_qword(i->seg(), RMAddr(i));

  clear_C1();

  if (! IS_TAG_EMPTY(-1))
  {
    BX_CPU_THIS_PTR FPU_stack_overflow();
    return;
  }

  // convert packed BCD to 64-bit integer
  Bit64s scale = 1;
  Bit64s val64 = 0;

  for (int n = 0; n < 16; n++)
  {
    val64 += (lo8 & 0x0f) * scale;
    lo8 >>= 4;
    scale *= 10;
  }

  val64 += (hi2 & 0x0f) * scale;
  val64 += ((hi2>>4) & 0x0f) * scale * 10;

  floatx80 result = int64_to_floatx80(val64);
  if (hi2 & 0x8000)	// set negative
      floatx80_chs(result);

  BX_CPU_THIS_PTR the_i387.FPU_push();
  BX_WRITE_FPU_REG(result, 0);
#else
  BX_INFO(("FBLD_PACKED_BCD: required FPU, configure --enable-fpu"));
#endif
}

Esempio n. 12

File: fpu_load_store.cpp Progetto: iver6/BA

/* DF /4 */
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FBLD_PACKED_BCD(bxInstruction_c *i)
{
  BX_CPU_THIS_PTR prepareFPU(i);

  RMAddr(i) = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
  Bit16u hi2 = read_virtual_word(i->seg(), (RMAddr(i) + 8) & i->asize_mask());
  Bit64u lo8 = read_virtual_qword(i->seg(), RMAddr(i));

  FPU_update_last_instruction(i);

  clear_C1();

  if (! IS_TAG_EMPTY(-1))
  {
    FPU_stack_overflow();
    BX_NEXT_INSTR(i);
  }

  // convert packed BCD to 64-bit integer
  Bit64s scale = 1;
  Bit64s val64 = 0;

  for (int n = 0; n < 16; n++)
  {
    val64 += (lo8 & 0x0f) * scale;
    lo8 >>= 4;
    scale *= 10;
  }

  val64 += (hi2 & 0x0f) * scale;
  val64 += ((hi2>>4) & 0x0f) * scale * 10;

  floatx80 result = int64_to_floatx80(val64);
  if (hi2 & 0x8000)        // set negative
      floatx80_chs(result);

  BX_CPU_THIS_PTR the_i387.FPU_push();
  BX_WRITE_FPU_REG(result, 0);

  BX_NEXT_INSTR(i);
}

Esempio n. 13

File: fpu_load_store.cpp Progetto: hack477/bochs4wii

/* DF /5 */
void BX_CPP_AttrRegparmN(1) BX_CPU_C::FILD_QWORD_INTEGER(bxInstruction_c *i)
{
#if BX_SUPPORT_FPU
  BX_CPU_THIS_PTR prepareFPU(i);

  Bit64s load_reg = (Bit64s) read_virtual_qword(i->seg(), RMAddr(i));

  clear_C1();

  if (! IS_TAG_EMPTY(-1)) {
    BX_CPU_THIS_PTR FPU_stack_overflow();
    return;
  }

  floatx80 result = int64_to_floatx80(load_reg);
  BX_CPU_THIS_PTR the_i387.FPU_push();
  BX_WRITE_FPU_REG(result, 0);
#else
  BX_INFO(("FILD_QWORD_INTEGER: required FPU, configure --enable-fpu"));
#endif
}

Esempio n. 14

File: fpu_load_store.cpp Progetto: hack477/bochs4wii

void BX_CPP_AttrRegparmN(1) BX_CPU_C::FLD_EXTENDED_REAL(bxInstruction_c *i)
{
#if BX_SUPPORT_FPU
  BX_CPU_THIS_PTR prepareFPU(i);

  floatx80 result;
  read_virtual_tword(i->seg(), RMAddr(i), &result);

  clear_C1();

  if (! IS_TAG_EMPTY(-1)) {
    BX_CPU_THIS_PTR FPU_stack_overflow();
    return;
  }

  BX_CPU_THIS_PTR the_i387.FPU_push();

  BX_WRITE_FPU_REG(result, 0);
#else
  BX_INFO(("FLD_EXTENDED_REAL: required FPU, configure --enable-fpu"));
#endif
}

Esempio n. 15

File: fpu_load_store.cpp Progetto: iver6/BA

/* DF /5 */
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FILD_QWORD_INTEGER(bxInstruction_c *i)
{
  BX_CPU_THIS_PTR prepareFPU(i);

  RMAddr(i) = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
  Bit64s load_reg = (Bit64s) read_virtual_qword(i->seg(), RMAddr(i));

  FPU_update_last_instruction(i);

  clear_C1();

  if (! IS_TAG_EMPTY(-1)) {
    FPU_stack_overflow();
  }
  else {
    floatx80 result = int64_to_floatx80(load_reg);
    BX_CPU_THIS_PTR the_i387.FPU_push();
    BX_WRITE_FPU_REG(result, 0);
  }

  BX_NEXT_INSTR(i);
}

Esempio n. 16

File: fpu_load_store.cpp Progetto: iver6/BA

BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FLD_EXTENDED_REAL(bxInstruction_c *i)
{
  BX_CPU_THIS_PTR prepareFPU(i);

  floatx80 result;

  RMAddr(i) = BX_CPU_CALL_METHODR(i->ResolveModrm, (i));
  result.fraction = read_virtual_qword(i->seg(), RMAddr(i));
  result.exp      = read_virtual_word(i->seg(), (RMAddr(i)+8) & i->asize_mask());

  FPU_update_last_instruction(i);

  clear_C1();

  if (! IS_TAG_EMPTY(-1)) {
    FPU_stack_overflow();
  }
  else {
    BX_CPU_THIS_PTR the_i387.FPU_push();
    BX_WRITE_FPU_REG(result, 0);
  }

  BX_NEXT_INSTR(i);
}