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A bit-width optimization methodology for polynomial-based function evaluation

delete2007-04-01
delete26
PRE
AI
L
Lee, Dong-U *
V
Villasenor, John D.
DOI:10.1109/TC.2007.1013delete
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摘要

摘要

En 中文
We present an automated bit-width optimization methodology for polynomial-based hardware function evaluation. Due to the analytical nature of the approach, overflow protection and precision accurate to one unit in the last place (ulp) can be guaranteed. A range analysis technique based on computing the root of the derivative of a signal is utilized to determine the minimal number of integer bits. Fractional bit requirements are established using an analytical error expression derived from the functions that occur along the data path. Global fractional bit optimization across multiple computation stages is performed using simulated annealing and circuit area estimation functions.
Keyword:
computer arithmetic
elementary function approximation
field programmable gate arrays
finite wordlength effects
minimax approximation and algorithms

期刊

IEEE Transactions on Computers 封面图
IEEE Transactions on Computers
IF:
3.8
论文数:
5.4K
被引数:
9.8K

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