C++ (Cpp) rawbits_to_double Beispiele

Beispiel #1

Datei: MozSimulator-vixl.cpp Projekt: juj/gecko-dev

void Simulator::ResetState() {
  // Reset the system registers.
  nzcv_ = SimSystemRegister::DefaultValueFor(NZCV);
  fpcr_ = SimSystemRegister::DefaultValueFor(FPCR);

  // Reset registers to 0.
  pc_ = NULL;
  pc_modified_ = false;
  for (unsigned i = 0; i < kNumberOfRegisters; i++) {
    set_xreg(i, 0xbadbeef);
  }
  // Set FP registers to a value that is a NaN in both 32-bit and 64-bit FP.
  uint64_t nan_bits = UINT64_C(0x7ff0dead7f8beef1);
  VIXL_ASSERT(IsSignallingNaN(rawbits_to_double(nan_bits & kDRegMask)));
  VIXL_ASSERT(IsSignallingNaN(rawbits_to_float(nan_bits & kSRegMask)));
  for (unsigned i = 0; i < kNumberOfFPRegisters; i++) {
    set_dreg_bits(i, nan_bits);
  }
  // Returning to address 0 exits the Simulator.
  set_lr(kEndOfSimAddress);
  set_resume_pc(nullptr);
}

Beispiel #2

Datei: Utils-vixl.cpp Projekt: AlexOreshkevich/mongo

double double_pack(uint64_t sign, uint64_t exp, uint64_t mantissa) {
  uint64_t bits = (sign << 63) | (exp << 52) | mantissa;
  return rawbits_to_double(bits);
}