@Override
	public DataType toDataType() throws DuplicateNameException, IOException {
		DataType dt = getSizeInBytes() == 2 ? WORD : DWORD;
		return new TypedefDataType(toString(), dt);
	}
The high-order 7 bits for the currently defined relocation opcode values.

Binary values indicated by "x" are "don't care" 
operands. For example, any combination of the high-order 7 bits that starts 
with two zero bits (00) indicates the RelocBySectDWithSkip instruction. 

Relocation instructions are stored in 2-byte relocation blocks. Most instructions 
take up one block that combines an opcode and related arguments. Instructions 
that are larger than 2 bytes have an opcode and some of the operands in the 
first 2-byte block, with other operands in the following 2-byte blocks. The 
opcode occupies the upper (higher-order) bits of the block that contains it. 
Relocation instructions can be decoded from the high-order 7 bits of their first 
block. 

All currently defined relocation instructions relocate locations as words 
(that is, 4-byte values).
Ghidra/Features/Base/src/main/java/ghidra/app/util/bin/format/pef/Relocation.java