Method bit_length

Source/external/fast_float.h:2376–2379

get the number of bits in the bigint.

  // get the number of bits in the bigint.
  FASTFLOAT_CONSTEXPR20 int bit_length() const noexcept {
	int lz = ctlz();
	return int(limb_bits * vec.len()) - lz;
  }

  FASTFLOAT_CONSTEXPR20 bool mul(limb y) noexcept {
	return small_mul(vec, y);