METHOD OF ENCODING REGISTER INSTRUCTION FIELDS

摘要

The method selects registers by a register instruction field having x bits. A first group of registers has up to 2y registers and a second group of registers has up to 2z registers where y and z are at least one and not great than x. The method includes encoding an instruction field with x bits wherein y of the x bits designates a register of the first group and z bits of the x bits designates a register of the second group. The register of the first group designated by the y bits of the instruction field and the register of the second group designated by the z bits of the instruction field are selected.