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The Design of High-Performance Dynamic Asynchronous Pipelines: Lookahead Style

机译:高性能动态异步管道的设计:超前风格

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A new class of asynchronous pipelines is proposed, called lookahead pipelines (LP), which use dynamic logic and are capable of delivering multi-gigahertz throughputs. Since they are asynchronous, these pipelines avoid problems related to high-speed clock distribution, such as clock power, management of clock skew, and inflexibility in handling varied environments. The designs are based on the well-known PS0 style of Williams and Horowitz as a starting point, but achieve significant improvements through novel protocol optimizations: the pipeline communication is structured so that critical events can be detected and exploited earlier. A special focus of this work is to target extremely fine-grain or gate-level pipelines, where the datapath is sectioned into stages, each consisting of logic that is only a single level deep. Both dual-rail and single-rail pipeline implementations are proposed. All the implementations are characterized by low-cost control structures and the avoidance of explicit latches. Post-layout SPICE simulations, in 0.18-$mu $ m technology, indicate that the best dual-rail LP design has more than twice the throughput (1.04 giga data items/s) of Williams'' PS0 design, while the best single-rail LP design achieves even higher throughput (1.55 giga data items/s).
机译:提出了一种新型的异步管道,称为超前管道(LP),该管道使用动态逻辑并能够提供数千兆赫的吞吐量。由于它们是异步的,因此这些流水线避免了与高速时钟分配有关的问题,例如时钟功率,时钟偏斜的管理以及在处理各种环境中的灵活性。这些设计基于Williams和Horowitz的著名PS0风格作为起点,但是通过新颖的协议优化实现了显着的改进:流水线通信的结构使得可以更早地检测和利用关键事件。这项工作的特别重点是针对极细粒度或门级的管道,其中数据路径被分成多个阶段,每个阶段都由仅深一层的逻辑组成。提出了双轨和单轨管道实施。所有实现均以低成本控制结构和避免显式锁存为特征。采用0.18-μm技术的布局后SPICE仿真表明,最好的双轨LP设计的吞吐量(1.04千兆数据项/秒)是Williams PS0设计的两倍以上,而最好的单轨LP设计具有rail LP设计可实现更高的吞吐量(1.55千兆数据项/秒)。

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