Invention Grant
US6041399A VLIW system with predicated instruction execution for individual
instruction fields
失效
具有针对各个指令字段执行预定指令的VLIW系统
- Patent Title: VLIW system with predicated instruction execution for individual instruction fields
- Patent Title (中): 具有针对各个指令字段执行预定指令的VLIW系统
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Application No.: US884667Application Date: 1997-06-27
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Publication No.: US6041399APublication Date: 2000-03-21
- Inventor: Koichi Terada , Keiji Kojima , Yoshifumi Fujikawa , Tohru Nojiri , Kiyokazu Nishioka
- Applicant: Koichi Terada , Keiji Kojima , Yoshifumi Fujikawa , Tohru Nojiri , Kiyokazu Nishioka
- Applicant Address: JPX Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JPX Tokyo
- Priority: JPX8-182141 19960711
- Main IPC: G06F9/30
- IPC: G06F9/30 ; G06F9/32 ; G06F9/34 ; G06F9/38 ; G06F9/45
Abstract:
In the case of constituting a processing unit having the characteristic of a VLIW type processing unit and the characteristic of a pipeline type processing unit, since reference to the result of operations is made among a plurality of processing units executing in parallel the operations, transfer of the register file is frequently generated among the processing units, resulting in insufficient effect of the high speed operations. In view of solving this problem, the predicate registers are provided and moreover a means for broadcasting the update data of the predicate register to all processing units is also provided. Thereby, operations for obtaining branching condition and numerical value can be realized in different processing units and the number of steps of the processing program can be reduced. In addition, since high speed transfer between the processing units of the data register having a wider bit width is no longer required and thereby the mounting area can be reduced and high speed processing unit can be realized.
Public/Granted literature
- US4735915A Method of manufacturing a semiconductor random access memory element Public/Granted day:1988-04-05
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