中文摘要：

X处理器是我国自主设计的基于EPIC思想的高性能通用微处理器．介绍了8级流水线和OLSM执行模型，以很少的硬件代价克服了基本EPIC模型的局限性．设计了一种多分支预测结构，支持多条分支指令的并行执行，并通过判定执行减少分支指令的数目；设计了两级cache存储器，提出DTD低功耗设计方法，并通过前瞻执行隐藏访存的延迟．最后，展望了高性能通用微处理器的发展趋势．

英文摘要：

The X processor is an EPIC based high-performance general-purpose microprocessor. Eight-stage pipelines and OLSM execution model are designed, which overcomes the limitations of traditional EPIC execution model with little hardware overhead. A multi-branch predication structure is designed for parallel execution of multiple branch instructions. Predication is used to reduce branch instructions. Two-level cache memory is designed. DTD method is presented for low power design and speculation is used to hide memory latency. Finally, the future of high-performance microprocessors is prospected.