发明授权
- 专利标题: Method for handling condition code modifiers in an out-of-order multi-issue multi-stranded processor
- 专利标题(中): 用于处理无序多问题多链处理器中条件码修改器的方法
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申请号: US10738576申请日: 2003-12-17
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公开(公告)号: US07065635B1公开(公告)日: 2006-06-20
- 发明人: Rabin A. Sugumar , Sorin Iacobovici , Chandra M. R. Thimmannagari
- 申请人: Rabin A. Sugumar , Sorin Iacobovici , Chandra M. R. Thimmannagari
- 申请人地址: US CA Santa Clara
- 专利权人: Sun Microsystems, Inc.
- 当前专利权人: Sun Microsystems, Inc.
- 当前专利权人地址: US CA Santa Clara
- 代理机构: Osha-Liang LLP
- 主分类号: G06F9/38
- IPC分类号: G06F9/38
摘要:
A technique for handling a condition code modifying instruction in an out-of-order multi-stranded processor involves providing a condition code architectural register file for each strand, providing a condition code working register file, and assigning condition code architectural register file identification information (CARF_ID) and condition code working register file identification information (CWRF_ID) to the condition code modifying instruction. CARF_ID is used to index a location in a condition code rename table to which the CWRF_ID is stored. Thereafter, upon an exception-free execution of the condition code modifying instruction, a result of the execution is copied from the condition code working register file to the condition code architectural register file dependent on CARF_ID, CWRF_ID, register type information, and strand identification information.
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