发明授权
US5694587A Specialized millicode instructions for test PSW validity, load with
access test, and character translation assist
失效
测试PSW有效性的专用millicode指令，访问测试负载和字符翻译辅助
- 专利标题： Specialized millicode instructions for test PSW validity, load with access test, and character translation assist
- 专利标题（中）： 测试PSW有效性的专用millicode指令，访问测试负载和字符翻译辅助
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申请号： US414154申请日： 1995-03-31
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公开(公告)号： US5694587A公开(公告)日： 1997-12-02
- 发明人: Charles Franklin Webb , Mark Steven Farrell , Mark Anthony Check , John Stephen Liptay
- 申请人： Charles Franklin Webb , Mark Steven Farrell , Mark Anthony Check , John Stephen Liptay
- 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： G06F9/30
- IPC分类号： G06F9/30 ; G06F9/305 ; G06F9/318 ; G06F9/38 ; G06F11/07
摘要：
A pipelined computer processor in a milli-mode architected state tests the validity of a program status word with a mask stored in a millicode general register. The mask indicates bits in the program status word which are to be zeros if the word is valid. A logical AND operation is performed between correspondingly positioned bits in the word and bits in the mask and in addition the status of at least one other bit in the word is checked, a bit other than a correspondingly positioned bit.
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