Exemplos de int64_to_floatx80 em C++ (Cpp)

Exemplo n.º 1

Arquivo: fpu_load_store.cpp Projeto: 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
}

Exemplo n.º 2

Arquivo: fpu_load_store.cpp Projeto: 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);
}

Exemplo n.º 3

Arquivo: fpu_load_store.cpp Projeto: 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
}

Exemplo n.º 4

Arquivo: fpu_load_store.cpp Projeto: 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);
}