A Polymorphic Register File for Matrix Operations

Catalin Ciobanu1,  Georgi Kuzmanov1,  Alex Ramirez2,  Georgi Gaydadjiev1
1TU Delft, The Netherlands, 2Polytechnic University of Catalonia, Spain


Abstract

Previous vector architectures divided the available register file space in a fixed number of registers of equal sizes and shapes. We propose a register file organization which allows dynamic creation of a variable number of multidimensional registers of arbitrary sizes referred to as a Polymorphic Register File. Our objective is to evaluate the performance benefits of the proposed organization. Simulation results using real applications (Floyd and CG) suggest speedups of up to 3 times compared to the Cell SPU for Floyd and 2 times compared to a one dimensional vectorized version of the sparse matrix vector multiplication. Moreover, in the same experimental context, a large reduction in the number of executed instructions of up to 3000 times for Floyd and 2000 times for sparse matrix vector multiplication is achieved.