public void executeConditionalBranch(PcodeOpRaw op) {
		Varnode condVar = op.getInput(1);
		boolean takeBranch = false;
		if (condVar.getSize() > 8) {
			takeBranch = !memstate.getBigInteger(condVar, false).equals(BigInteger.ZERO);
		}
		else {
			takeBranch = memstate.getValue(condVar) != 0;
		}
		if (takeBranch) {
			executeBranch(op);
		}
		else {
			fallthruOp();
		}
	}
Update the iterator into the current pcode cache, and if necessary, generate
the pcode for the fallthru instruction and reset the iterator.
Ghidra/Framework/Emulation/src/main/java/ghidra/pcode/emulate/Emulate.java