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Prefetching exception vectors by early lookup exception vectors within a cache memory
Prefetching exception vectors by early lookup exception vectors within a cache memory
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机译:通过缓存中的早期查找异常向量来预取异常向量
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摘要
An integrated circuit processor core 4 is provided with an instruction pipeline 20 along which program instructions advance. When an exception condition occurs part way through execution of a particular program instruction, then a prefetch of the exception handling program instruction corresponding to that exception is initiated before the currently executing program instruction has completed. In this way the exception handling program instruction is more rapidly available to start the exception processing. The early prefetch may involve performing a lookup in a cache memory 6 and any necessary linefill upon a miss. In addition, the exception handling program instruction amy also be fed into the instruction pipeline 20 before an instruction boundary is reached.
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