发明授权
- 专利标题: Very fast pipelined shifter element with parity prediction
- 专利标题(中): 具有奇偶校验预测的非常快速的流水线移位器元件
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申请号: US765003申请日: 1997-07-14
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公开(公告)号: US5978957A公开(公告)日: 1999-11-02
- 发明人: Wilhelm Haller , Klaus Getzlaff , Erwin Pfeffer , Ute Gaertner , Gunter Gerwig
- 申请人: Wilhelm Haller , Klaus Getzlaff , Erwin Pfeffer , Ute Gaertner , Gunter Gerwig
- 申请人地址: NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: NY Armonk
- 主分类号: G06F11/10
- IPC分类号: G06F11/10 ; G06F5/01
摘要:
A shifting structure and method which separates a shifting operation into partial shifts which may be executed in different pipeline staged is described herein. In a first pipe stage, an operand is read out and at least one partial shift is accomplished by placing the operand or parts thereof into registers coupled to a shift unit. The shift unit, in a second pipe stage, finalizes the shifting operation executing the remaining partial shifts, thereby reducing the time required for the total shifting operation. A control string is derived in the shift unit based on the shift amount to correct the output of the shifted result as well as providing for parity prediction therefor.
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