A new class of optimal bounded-degree VLSI sorting networks

摘要

Minimum-area very large scale integration (VLSI) networks have been proposed for sorting N elements in O(log,N) time. However, most of such networks proposed have complex structures, and no explicit network construction is given in others. New designs of optimal VLSI sorters that combine rotate-sort with enumeration-sort to sort N numbers, each of length w (1+ in )logN bits (for any constant in <0), in time T in ( Omega (logN), Theta square root (NlogN)). The main attributes of the proposed sorters are a significantly smaller number of sorting nodes than in previous designs and smaller constant factors in their time complexity. The proposed sorters use a new class of reduced-area K-shuffle layouts to route data between sorting stages. These layouts can be also used to provide explicit designs for the column-sort technique developed by F.T. Leighton (1985).