Function BitFieldInsert

Bcore/src/main/cpp/base/bit_utils.h:444–456

template <typename T, typename T2>
inline static constexpr T BitFieldInsert(T value, T2 data, size_t lsb, size_t width) {
  DCHECK_GE(BitSizeOf(value), lsb + width) << "Bit field out of range for value";
  if (width != 0u) {
    DCHECK_GE(MaxInt<T2>(width), data) << "Data out of range [too large] for bitwidth";
    DCHECK_LE(MinInt<T2>(width), data) << "Data out of range [too small] for bitwidth";
  } else {
    DCHECK_EQ(static_cast<T2>(0), data) << "Data out of range [nonzero] for bitwidth 0";
  }
  const auto data_mask = MaskLeastSignificant<T2>(width);
  const auto value_cleared = BitFieldClear(value, lsb, width);

  return static_cast<T>(value_cleared | ((data & data_mask) << lsb));
}

// Extracts the bitfield starting at the least significant bit "lsb" with a bitwidth of 'width'.
// Signed types are sign-extended during extraction. (Equivalent of ARM UBFX/SBFX instruction).