public long getValue() {
			if (isRegisterRelativeValue()) {
				long off = value;
				int size = relativeRegister.getBitLength();
				off = (off << (64 - size)) >> (64 - size);
				return off;
			}
			return value;
		}
@return constant value.  This value is register-relative
if isRegisterRelativeValue() returns true.
Ghidra/Features/Base/src/main/java/ghidra/program/util/SymbolicPropogator.java