public int getNumUncertainBits() {
		int popcnt = 0;
		for (byte dit : dits) {
			popcnt += popcount[0xff & dit];
		}
		return 8 * dits.length - popcnt;
	}
Get number of bits that are ditted (don't care)

@return number of ditted bits (don't care)
Ghidra/Features/Base/src/main/java/ghidra/util/bytesearch/DittedBitSequence.java