Instruction set and executing method of the same by microcomputer
    1.
    发明授权
    Instruction set and executing method of the same by microcomputer 失效
    微机的指令集和执行方法

    公开(公告)号:US06253314B1

    公开(公告)日:2001-06-26

    申请号:US08844103

    申请日:1997-04-28

    申请人: Sakae Itoh

    发明人: Sakae Itoh

    IPC分类号: G06F9306

    摘要: A computer program product, method and apparatus for utilizing common prefix codes in computing instructions so as to reduce the number instructions required to perform identical operations for varying operand sizes. In one form, the common prefix code is appended as the higher order portion of the instruction word to form a second series of instructions. These computing instructions may be utilized in conjunction with a flag register, which, in one application, designates which series of instructions to use; either the original instructions or the modified instructions containing the common prefix. In another application, the flag register designates which register or memory should be used to store the operands and the associated results. Through the use of common prefix codes and the flag register, operands of various sizes can be efficiently manipulated through a simplified scheme of instructions.

    摘要翻译: 一种用于在计算指令中利用公用前缀码的计算机程序产品,方法和装置,以便减少执行用于改变操作数大小的相同操作所需的编号指令。 在一种形式中,公共前缀码作为指令字的高阶部分被附加以形成第二系列指令。 这些计算指令可以与标志寄存器一起使用,该标志寄存器在一个应用中指定使用哪一系列指令; 原始指令或包含公共前缀的修改指令。 在另一个应用中,标志寄存器指定应使用哪个寄存器或存储器来存储操作数和相关联的结果。 通过使用公共前缀码和标志寄存器,可以通过简化的指令方案有效地操纵各种大小的操作数。