Restructuring Mesh-Connected Processor Arrays with Spares on Four Sides by Orthogonal Side Rotation

An array with spares on four sides and the restructuring algorithm for it were proposed in [1]. However, the restructuring algorithm described in [1] is too complicated to be realized in hardware. Here, we propose a method to improve such the situation. First, the array is considered to be an (N +2) (N +2) array if four PEs are added to the four corners of the array and the spares are included. The (N+2) (N+2) array is divided into four subarrays, each of which is of size (N=2 + 1)(N=2 + 1), and the orthogonal side rotation introduced here is individually applied to each subarray. The reliabilities are given by computer simulation. They fairly increase, comparing with those in [1]. :