public void round() {
		BigFloat half = new BigFloat(fracbits, expbits, FloatKind.FINITE, +1,
			BigInteger.ONE.shiftLeft(fracbits - 1), -1);
		add(half);
		floor();
	}
Round this value to the nearest whole number
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/pcode/floatformat/BigFloat.java