发明公开
EP0221191A1 Alu and condition code control unit for data processor 失效
算术逻辑单元和单元,用于存储在处理单元的条件指令。

  • 专利标题: Alu and condition code control unit for data processor
  • 专利标题(中): 算术逻辑单元和单元,用于存储在处理单元的条件指令。
  • 申请号: EP84103253.5
    申请日: 1980-04-30
  • 公开(公告)号: EP0221191A1
    公开(公告)日: 1987-05-13
  • 发明人: Tredennick, Harry LeslieGunter, Thomas Glen
  • 申请人: MOTOROLA, INC.
  • 申请人地址: Corporate Offices, Motorola Center 1303 East Algonquin Rd. Schaumburg Illinois 60196 US
  • 专利权人: MOTOROLA, INC.
  • 当前专利权人: MOTOROLA, INC.
  • 当前专利权人地址: Corporate Offices, Motorola Center 1303 East Algonquin Rd. Schaumburg Illinois 60196 US
  • 代理机构: Newens, Leonard Eric
  • 优先权: US41202 19790521
  • 主分类号: G06F9/26
  • IPC分类号: G06F9/26
Alu and condition code control unit for data processor
摘要:
A data processor which is adapted for microprogrammed operation has a control store includes an ALU and condition code control unit for controlling operations performed by an arithmetic-logic unit within the execution unit of the data processor and for controlling the setting of the condition code bits in a status register. The ALU and condition code control unit is arranged in a row and column format. A decoder coupled to a macroinstruction register selects a row which is selected over an entire period that is required to execute macroinstruction. The row corresponds to a set of operations and condition code settings associated with a particular macroinstruction. The control store output provides information for selecting the proper column during each microcycle used to execute the macroinstruction. ALU function control signals and the condition code control signals are selected simultaneously according to the selected row and column.
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