Abstract
Deep Neural Networks (DNNs) have various performance requirements and power constraints depending on applications. To maximize the energy-efficiency of hardware accelerators for different applications, the accelerators need to support various bit-width configurations. When designing bit-reconfigurable accelerators, each PE must have variable shift-addition logic, which takes a large amount of area and power. This paper introduces an area and energy efficient precision-scalable neural network accelerator (BitBlade), which reduces the control overhead for variable shift-addition using bitwise summation method. The proposed BitBlade, when synthesized in a 28nm CMOS technology, showed reduction in area by 41% and in energy by 36-46% compared to the state-of-the-art precision-scalable architecture [14].
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