Function is_odd_integer

system/lib/llvm-libc/src/math/generic/pow.cpp:173–183

};

bool is_odd_integer(double x) {
  using FPBits = fputil::FPBits<double>;
  FPBits xbits(x);
  uint64_t x_u = xbits.uintval();
  unsigned x_e = static_cast<unsigned>(xbits.get_biased_exponent());
  unsigned lsb =
      static_cast<unsigned>(cpp::countr_zero(x_u | FPBits::EXP_MASK));
  constexpr unsigned UNIT_EXPONENT =
      static_cast<unsigned>(FPBits::EXP_BIAS + FPBits::FRACTION_LEN);
  return (x_e + lsb == UNIT_EXPONENT);
}

bool is_integer(double x) {
  using FPBits = fputil::FPBits<double>;