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    • 3. 发明授权
    • Data pointer for outputting indirect addressing mode addresses within a
single cycle and method therefor
    • 用于在单个周期内输出间接寻址模式地址的数据指针及其方法
    • US6098160A
    • 2000-08-01
    • US959559
    • 1997-10-28
    • Rodney J. DrakeRandy L. YachIgor WojewodaJoseph W. TrieceBrian BolesDarrel Johansen
    • Rodney J. DrakeRandy L. YachIgor WojewodaJoseph W. TrieceBrian BolesDarrel Johansen
    • G06F9/35G06F12/00
    • G06F9/35
    • A data pointer for generating an indirect addressing mode address within a single cycle for a selected one of a plurality of multiple indirect addressing modes. The data pointer is used with a processor architecture scheme which allows for encoding of multiple addressing modes. A data pointer register is coupled to the processor architecture scheme for storing a current address of an operand to be used in a simple indirect addressing mode. An incrementer is coupled to the data pointer register for incrementing the current address of an operand to be used in a simple indirect data addressing mode by a set number thereby generating an address of an operand to be used in an indirect addressing mode with auto preincrement. An adder is coupled to the data pointer register for combining the current address of an operand to be used in a simple indirect data addressing mode with an offset number thereby generating an address of an operand to be used in an indirect addressing mode with offset. A multiplexer circuit is coupled to an output of the data pointer register, to an output of the incrementer, and to an output of the adder for selecting a desired indirect addressing mode address.
    • 一种数据指针,用于在多个间接寻址模式中选定的一个周期内在单个周期内生成间接寻址模式地址。 数据指针与处理器架构方案一起使用,该方案允许对多种寻址模式进行编码。 数据指针寄存器耦合到处理器架构方案,用于存储要在简单的间接寻址模式中使用的操作数的当前地址。 增量器被耦合到数据指针寄存器,用于以简单的间接数据寻址模式递增一个操作数的当前地址一个设定的数字,从而产生要以具有自动预压缩的间接寻址方式使用的操作数的地址。 加法器耦合到数据指针寄存器,用于将要在简单间接数据寻址模式中使用的操作数的当前地址与偏移号组合,从而生成要在具有偏移量的间接寻址模式中使用的操作数的地址。 多路复用器电路耦合到数据指针寄存器的输出,加法器的输出端和加法器的输出端,用于选择期望的间接寻址模式地址。