Reducing the cost of branches

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Abstract
Pipelining is the major organizational technique that computers use to reach higher single-processor performance. A fundamental disadvantage of pipelining is the loss incurred due to branches that require stalling or flushing the pipeline. Both hardware solutions and architectural changes have been proposed to overcome these problems. This paper examines a range of schemes for reducing branch cost focusing on both static (compile-time) and dynamic (hardware-assisted) prediction of branches. These schemes are investigated from quantitative performance and implementation viewpoints. 1

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