protected void scaleUpTo(int newLength) {
		if (kind != FloatKind.FINITE) {
			throw new AssertionError("scaling of non-finite float!");
		}
		int d = newLength - this.unscaled.bitLength();
		if (d > 0) {
			this.upscale(d);
		}
	}
Return the BigFloat with the given number of bits representing (quiet) NaN.

@param fracbits number of fractional bits
@param expbits number of bits in the exponent
@param sign +1 or -1
@return a BigFloat representing (quiet) NaN
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/pcode/floatformat/BigFloat.java