Predicate controlled software pipelined loop processing with prediction of predicate writing and value prediction for use in subsequent iteration

发明授权

US06629238B1 Predicate controlled software pipelined loop processing with prediction of predicate writing and value prediction for use in subsequent iteration 失效

标题翻译：谓词控制软件流水线循环处理，预测谓词写入和值预测，用于后续迭代

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专利标题： Predicate controlled software pipelined loop processing with prediction of predicate writing and value prediction for use in subsequent iteration
专利标题（中）： 谓词控制软件流水线循环处理，预测谓词写入和值预测，用于后续迭代
申请号： US09474462

申请日： 1999-12-29
公开(公告)号： US06629238B1

公开(公告)日： 2003-09-30
发明人: Judge K. Arora , Tse-Yu Yeh
申请人： Judge K. Arora , Tse-Yu Yeh
主分类号： G06F938
IPC分类号： G06F938

Predicate controlled software pipelined loop processing with prediction of predicate writing and value prediction for use in subsequent iteration

摘要：

The present invention provides a mechanism for predicting whether a predicate is written and a value of the predicate to be written. For one embodiment, a predicate predictor is used to predict whether a predicate, in some cases a stage predicate, is written and a value to be written for the predicate, using the branch type and branch prediction information supplied by a branch predictor. The predicted stage predicate value controls data hazard handling and data bypasses operations for intermediate stages of the processor's instruction execution pipeline. The predicted stage predicate value may be validated when the modulo-scheduled loop instruction is resolved at the back end of the instruction execution pipeline.

摘要（中）：

本发明提供了一种用于预测谓词是否被写入的机制和要写入的谓词的值。对于一个实施例，谓词预测器用于使用由分支预测器提供的分支类型和分支预测信息来预测谓词（在某些情况下是舞台谓词）是否被写入，并且为谓词写入的值。预测阶段谓词值控制处理器指令执行管线的中间阶段的数据危险处理和数据旁路操作。当在指令执行管线的后端解决模数调度循环指令时，可以验证预测阶段谓词值。

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