Design Issues in Division and Other Floating-Point Operations (1997)
| Venue: | IEEE Transactions on Computers |
| Citations: | 19 - 7 self |
BibTeX
@ARTICLE{Oberman97designissues,
author = {Stuart F. Oberman and Student Member and Michael J. Flynn},
title = {Design Issues in Division and Other Floating-Point Operations},
journal = {IEEE Transactions on Computers},
year = {1997},
volume = {46},
pages = {154--161}
}
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Abstract
Floating-point division is generally regarded as a low frequency, high latency operation in typical floating-point applications. However, in the worst case, a high latency hardware floating-point divider can contribute an additional 0.50 CPI to a system executing SPECfp92 applications. This paper presents the system performance impact of floating-point division latency for varying instruction issue rates. It also examines the performance implications of shared multiplication hardware, shared square root, on-the-fly rounding and conversion, and fused functional units. Using a system level study as a basis, it is shown how typical floating-point applications can guide the designer in making implementation decisions and trade-offs.
