private int decodeSignedInt32(int input) {
		if ((input & 0x01) == 0x01) {
			return -(input >> 1);
		}
		return input >> 1;
	}
Constructor for this symbol component.
@param reader {@link PdbByteReader} from which this data is deserialized.
@throws PdbException Upon not enough data left to parse.
Ghidra/Features/PDB/src/main/java/ghidra/app/util/bin/format/pdb2/pdbreader/symbol/InstructionAnnotation.java