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Data Flow Transformation for Energy-Efficient Implementation of Givens RotationBased QRD NAMITA SHARMA and PREETI RANJAN PANDA, Indian Institute of Technology Delhi FRANCKY CATTHOOR, Interuniversity Microelectronics Centre and K. U. Leuven MIN LI, Interuniversity Microelectronics Centre PRASHANT AGRAWAL, Interuniversity Microelectronics Centre and K. U. Leuven QR decomposition (QRD), a matrix decomposition algorithm widely used in embedded application domain, can be realized in a large number of valid processing sequences that differ significantly in the number of memory accesses and computations, and hence the overall implementation energy. With modern low-power embedded processors evolving toward register files with wide memory interfaces and vector functional units (FUs), data flow in these algorithms needs to be carefully devised to efficiently utilize the costly wide memory accesses and the vector FUs. In this article, we present an energy-efficient data flow transformation strategy for the Givens rotationbased QRD. Categories and Subject Descriptors: C.3 [Special Purpose and Application-Based Systems]: RealTime and Embedded Systems; D.3.4 [Programming Languages]: Processors--Compilers, optimization; E.1 [Data Structures]: Arrays General Terms: Design Additional Key Words and Phrases: Data flow transformation, energy optimization, matrix decomposition, SIMD architectures ACM Reference Format: Namita Sharma, Preeti Ranjan Panda, Francky Catthoor, Min Li, and Prashant Agrawal. 2016. Data
ACM Transactions on Embedded Computing Systems (TECS) – Association for Computing Machinery
Published: Jan 13, 2016
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