Function Set64BitPrecisionControl

src/config.cc:63–67

typedef unsigned int FPControl;

FPControl Set64BitPrecisionControl() {
  FPControl old_ctrl = _control87(0, 0);
  _control87(_PC_64, _MCW_PC);
  return old_ctrl;
}

void ResetPrecisionControl(FPControl old_ctrl) {
  _control87(old_ctrl, _MCW_PC);