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Analysis of the influence of register file size on energy consumption, code size, and execution time

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5 Author(s)
L. Wehmeyer ; Dept. of Comput. Sci. XII, Dortmund Univ., Germany ; M. K. Jain ; S. Steinke ; P. Marwedel
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Interest in low-power embedded systems has increased considerably in the past few years. To produce low-power code and to allow an estimation of power consumption of software running on embedded systems, a power model was developed based on physical measurement using an evaluation board and integrated into a compiler and profiler. The compiler uses the power information to choose instruction sequences consuming less power, whereas the profiler gives information about the total power consumed during execution of the generated program. The used compiler is parameterized such that, e.g., the register file size may be changed. The resulting code is evaluated with respect to code size, performance, and power consumption for different register file sizes. The extracted information is especially useful during application analysis and architecture space exploration in application-specific integrated processor (ASIP) design. Our analysis gives the designer the ability to estimate the desirable register file size for an ASIP design. The size of the register file should be considered as a design parameter since it has a strong impact on the energy consumption of embedded systems

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IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems  (Volume:20 ,  Issue: 11 )