An interleaved rational/radix arithmetic system for high-precision computations

K. Hwang, T. Chang
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引用次数: 3

Abstract

A new interleaved rational/radix number system is proposed for upgrading the precision of normalized Floating-Point (FLP) arithmetic operations without increasing the basic word length. A complete set of rational rounding and arithmetic algorithms are developed. The Average Relative Representation Error (ARRE) of the proposed flexible FLP system is computed through a series of simulation studies on CDC 6500. Our results show a 10% improvement of representation accuracy when compared with the ARRE of conventional FLP system. The architecture of a rational FLP arithmetic processor is also presented. Tradeoffs between operating speed and computing accuracy are discussed.
用于高精度计算的交错有理数/基数算术系统
为了在不增加基本字长的情况下提高归一化浮点(FLP)算术运算的精度,提出了一种新的有理数/基数交错系统。给出了一套完整的有理舍入算法和算术算法。通过在CDC 6500上的一系列仿真研究,计算了柔性FLP系统的平均相对表示误差(ARRE)。结果表明,与传统FLP系统的ARRE相比,表征精度提高了10%。给出了一个合理的FLP算法处理器的结构。讨论了运算速度和计算精度之间的权衡。
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