Application of ameliorated Harris Hawks optimizer for designing of low-power signed floating-point MAC architecture

摘要

Recently established Harris Hawks optimization (HHO) has natural behaviour for finding an optimum solution in global search space without getting trapped in previous convergence. However, the exploitation phase of the current Harris Hawks optimizer algorithm is poor. In the present research, an improved version of the Harris Hawks optimization algorithm, which combined HHO with Particle Swarm Optimization and named as ameliorated Harris Hawks optimizer algorithm, has been proposed to find the solution of various optimization problems such as nonlinear, non-convex and highly constrained engineering design problem. In the proposed research, the exploitation phase of the existing HHO algorithm is improved using a particle swarm optimization algorithm and its performance tested for CEC2005, CECE2017 and CEC2018 benchmark problems. Also, discrete algorithms such as FFT algorithms, convolution and image processing algorithm use multiply and accumulate (MAC) unit as a critical component. The efficiency of a MAC is mainly dependent upon the speed of operation, power dissipation and chip area along with the complexity level of the circuit. In this research paper, a power-efficient signed floating-point MAC (SFMAC) is proposed using universal compressor-based multiplier (UCM). Instead of having a complex design architecture, a simple multiplexer-based circuit is used to achieve signed floating output. The 8 x 8 SFMAC can take 8-bit mantissa and 3-bit exponent. And therefore, the input to the SFMAC can be in the range of - (7.96875)(10) to + (7.96875)(10). The design and implementation of the proposed architecture is done on the Cadence Spectre tool in GPDK 90 nm and TSMC 130 nm technologies. The analysis has proved that the proposed SFMAC architecture has consumed the least power than the recent MAC architectures available in the literature.