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A Design of Dual-Phase Instructions for a effective Logarithm and Exponent Arithmetic  

Kim, Chi-Yong (서경대학교 컴퓨터공학과)
Lee, Kwang-Yeob (서경대학교 컴퓨터공학과)
Publication Information
Journal of IKEEE / v.14, no.2, 2010 , pp. 64-68 More about this Journal
Abstract
This paper proposes efficient log and exponent calculation methods using a dual phase instruction set without additional ALU unit for a mobile enviroment. Using the Dual Phase Instruction set, it extracts exponent and mantissa from expression of floating point and calculates 24bit single precision floating point of log approximation using the Taylor series expansion algorithm. And with dual phase instruction set, it reduces instruction excution cycles. The proposed Dual Phase architecture reduces the performance degradation and maintain smaller size.
Keywords
logarithm arithmetic; exponent arithmetic; dual phase; arithmetic instruction;
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