A method and system for renaming registers of said system is proposed in which mixed instruction sets, e.g. 32 bit and 64 bit instructions are carried out concurrently in one program. In case of an instruction sequence of a preceding 64 bit instruction and one or more 32 bit instructions to be executed...http://www.google.com.hk/patents/US6237076?utm_source=gb-gplus-share專利 US6237076 - Method for register renaming by copying a 32 bits instruction directly or indirectly to a 64 bits instruction
