Function BitFieldClear

Bcore/src/main/cpp/base/bit_utils.h:417–423

//                       lsb      0
template <typename T>
inline static constexpr T BitFieldClear(T value, size_t lsb, size_t width) {
  DCHECK_GE(BitSizeOf(value), lsb + width) << "Bit field out of range for value";
  const auto val = static_cast<std::make_unsigned_t<T>>(value);
  const auto mask = MaskLeastSignificant<T>(width);

  return static_cast<T>(val & ~(mask << lsb));
}

// Inserts the contents of 'data' into bitfield of 'value'  starting
// at the least significant bit "lsb" with a bitwidth of 'width'.