| 基于AltiVec技术的浮点乘加单元的设计 |
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| 引用本文： | 赵明亮,樊晓桠,黄小平,姚涛. 基于AltiVec技术的浮点乘加单元的设计[J]. 计算机测量与控制, 2010, 18(1) |
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| 作者姓名： | 赵明亮 樊晓桠 黄小平 姚涛 |
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| 作者单位： | 西北工业大学,航空微电子中心,陕西,西安,710065 |
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| 基金项目： | 国家自然基金(60773223);;国家自然基金重点项目(60736012) |
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| 摘 要： | Alti Vec技术是为提高PowerPC的向量处理能力而对PowerPC指令集体系结构的扩展;浮点乘加单元是向量处理单元的主要构成部分,设计一种基于Alti Vec技术的向量浮点乘加单元;在基本浮点乘加器的基础上,提出了java模式下对非规格化数的预规格化处理;设计采用了一种半并行的结构,与传统的全并行结构相比可以节省一半的硬件面积;时钟频率为266 MHz时,java模式下5拍可以完成,非java模式下4拍可以完成。
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| 关 键 词： | AltiVec 浮点乘加器 java模式 预规格化 |
Design of Floating-Point Multiply-Add Fused Unit Based on AltiVec Technology |
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| Zhao Mingliang,Fan Xiaoya,Huang Xiaoping,Yao Tao. Design of Floating-Point Multiply-Add Fused Unit Based on AltiVec Technology[J]. Computer Measurement & Control, 2010, 18(1) |
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| Authors: | Zhao Mingliang Fan Xiaoya Huang Xiaoping Yao Tao |
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| Affiliation: | Aviation Microelectronics Center in Northwestern Polytechnical University/a>;Xi'an 710065/a>;China |
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| Abstract: | AltiVec technology is an extension to the PowerPC Instruction Set Architecture to enhance the performance in vector processing.Floating-point multiply-add fused(MAF) unit is a main component of the vector processing unit.This paper presents a vector floating-point MAF unit based on AltiVec technology.Pre-normalization logic is added to traditional floating-point structure to deal with denormalized number in java mode.It also proposes a semi-parallel structure to construct the vector floating-point MAF unit,... |
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| Keywords: | AltiVec floating-point multiply-add fused java mode pre-normalization |
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